Abstracts
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Dialogue Session 3
DS3.1: Topic 3:
Power supplies
(J. L. Van
Eck, ULB, Belgium, A.
Berthon, L2ES-CREEBEL, France)
Improved High-Power-Factor Three-Phase Diode Rectifiers Using
Ripple-Power Re-Rectification
Tiiu Sakkos, Vello Sarv, and Jaan Jنrvik
TALLINN TECHNICAL UNIVERSITY
Kopli 82
EE10412 Tallinn, Estonia
Tel.: +372 6 703 607
Fax: +372 6 613 655
e-mail: eeri@eeri.ee
Efficient two-stage power factor correctors for three-phase diode rectifiers
to ensure a close-to-unity power factor are proposed, analyzed, and verified.
The technique proposed is based on the ripple-power re-rectification into an
additional quantity of the DC output power. The new schemes contain a
series-resonant third-harmonic filter and a low-power auxiliary AC-DC converter
for optimum ripple-power re-rectification. An advantage of the new schemes is
elimination of the magnetic third-harmonic current injection device used in the
previous schemes. The high values of the power factor hold in the wide range of
the load and supply-voltage variation.
Development of a Novel Power Apparatus to Make up for Voltage Dips and
Interruptions Based on Quick Reversible Operation of a PWM Converter
Contact Address:
Ilmenau Technical University, Dept. of Power Electronics and Control
POBOX 100565, D-98684 Ilmenau, Germany
Phone: ++49 3677 692850, Fax: ++49 3677 691469,
e-mail:
tobias.reimann@e-technik.tu-ilmenau.de
The paper investigates the power losses and temperature performance of MOSFET
devices in a low voltage synchronous rectifier circuit. Different devices are
applied to compare their characteristics and several auxiliary circuits are
proposed to improve the efficiency of the power converter. The novel topologies
are discussed using PSPICE simulations and experimental results. It is shown
that adding an auxiliary circuit in synchronous rectifiers using MOSFETs as main
devices is an effective method to reduce the power losses. So, the power MOSFETs
can operate with reduced heat sink under high current condition
Single phase
Hybrid Power Factor Correction
W. Ettes, A. Bron
Philips DAP BV
Oliemolenstraat 5, 9200 CA
Drachten, the Netherlands
Tel.: +31 512 592206
W.Ettes@Philips.com
Andries.Bron@Philips.com
To reduce the amplitude of the higher harmonics of the line current,
rectifiers with both active and passive filters are widely used. These so called
Power Factor Corrector's (PFC's) can be grouped into three kinds: active PFC,
passive PFC and hybrid PFC. The active PFC’s draw a ‘perfect’ line current from
the mains but due to the HF switching process additional noise and losses are
introduced. Passive PFC’s are very simple to apply but they are bulky and
stabilisation of the DC output voltage is absent. Although the line current is
distorted with higher harmonics, the passive PFC complies with the IEC-61000-3-2
guideline if the filter inductor value is properly designed. A further reduction
of the size and weight of the filter inductor of the passive PFC is possible if
the hybrid PFC method is applied. The hybrid PFC exists of a parallel connection
of a passive and an active PFC. In this paper the design of a 1 kW hybrid PFC is
described which complies with the IEC-61000-3-2 guideline. The main objective of
the hybrid PFC design is to reduce the size and cost of a passive PFC, without
adding complexity too much.
Control
strategy for reducing inrush current in three-phase UPS systems
Shoji Nishikata, Shohei Kuroda, and Teruo Kataoka
Department of Electrical Engineering, Tokyo Denki University
2-2 Kanda-Nishikicho, Chiyoda-ku, Tokyo, 101-8457 Japan
Phone:+81-3-5280-3313
Fax:+81-3-5280-3573
E-mail:west@cck.dendai.ac.jp
Control strategy for reducing inrush current when a load of
capacitor-filtered rectifier is connected to a three-phase UPS system is
proposed. Inrush current can be greatly reduced when digital control with inrush
current suppression loop in addition to observer, voltage drop compensator and
PID controller is applied to the system. Transient responses of UPS output
voltage and load current when the load is connected are shown, and the
usefulness of the proposed control is verified with simulations and experiments.
Improvements in
Voltage Regulation and Current Sharing with the Droop Function
Enrico Dallago, Marco Passoni
Power Electronics Laboratory, Department of Electrical Engineering,
UNIVERSITY OF PAVIA
Via Ferrata -1, 27100
Pavia, Italy.
Phone : +39.0382505267 Fax : +39.0382422276
e-mail : dallago@unipv.it
passoni@unipv.it
http://ipvsp5.unipv.it/elpot.html
In this work voltage regulation with the droop function for low-voltage (LV),
high-current (HC) applications is analyzed. A new dynamic analysis of the droop
function gives a simple criterion for its sizing and a useful expression of the
output impedance. The results are also applied to a two-phase converter with
droop current sharing to evaluate both static and dynamic performance.
Experimental results confirm theoretical predictions.
Modelling of
the Asymmetrical Half-Bridge ZVT PWM Converter
Tobias Tolle
Philips Research Laboratories
P.O.Box 500 145, 52085 Aachen, Germany
Tel.: xx49 241 6003-706, Fax –465
E-mail: tobias.tolle@philips.com
Thomas Duerbaum
Philips Research Laboratories
P.O.Box 500 145, 52085 Aachen, Germany
Tel.: xx49 241 6003-258, Fax: -465
E-mail: thomas.duerbaum@philips.com
The BR-TRC2 converter is a member of the family of Asymmetrical Half-Bridge
topologies with several advantages, as zero voltage transition (ZVT), one diode
per output, limited voltage stress of the switching transistors, utilisation of
the transformers leakage inductance, and PWM fixed frequency control. This
article presents an introduction to this topology, giving a description and two
mathematical models that include losses of the components in practical
applications
Novel
evaluation of transient performance in a DC-AC flyback converter
Enrico Dallago, Alberto Danioni, Marco Passoni
Power Electronics Laboratory, Department of Electrical Engineering,
UNIVERSITY OF PAVIA
Via Ferrata -1, 27100
Pavia, Italy.
Phone : +39.0382505267 Fax : +39.0382422276
e-mail :dallago@unipv.it
alberto.danioni@unipv.it
passoni@unipv.it
http://ipvsp5.unipv.it/elpot.html
In this paper a CCM (Continuous Conduction Mode) Flyback Converter with PWM
technique is considered and the performance of the dynamic load regulation
investigated. A novel cycle-by-cycle modelization has been developed. This model
overcomes the limits of the averaged small signal model when large duty cycle
variations during the load transient are considered. .Theoretical results were
confirmed by experimental ones.
A New
Piezoelectric Transformer Control for an AC/DC Converter
F.Nuño, J.Díaz, J.A.Martín, M.J.Prieto
UNIVERSIDAD DE OVIEDO
Campus Universitario de Viesques, Edificio Oeste, 3
Gijón, Spain
Phone: +34 985 18 20 71
Fax: +34 985 18 21 38
fernando@ate.uniovi.es
http://www.ate.uniovi.es/
During the last years, a clear trend to miniaturise AC/DC adapters for portable
terminals has been detected world-wide. This could be possible by replacing the
classical transformer, built with commercial magnetic cores that not only limit
the miniaturisation of the converter but are also EMI sources, by an alternative
piezoelectric transformer, which features low profile, high power density (several
times higher than high frequency magnetic ones) and low EMI generation.
Due to the PT behavior, very frequency-dependent, previous works presented
frequency modulation to control the output voltage like the most natural way.
Also PWM control techniques can be employed in combination with the frequency
control to achieve both line and load regulation. In this paper, a new control
strategy is introduced that can be used with PT-based converters. It can
simplify the control design process and only a few components are necessary. The
switches in the power stage are so operated that a constant-frequency, constant
duty-cycle voltage waveform is applied to the input of the PT. The response of
the component to this waveform originates an output voltage that builds up to a
maximum allowable value. When this value is reached, the control circuit detects
this situation and stops driving the switches. The PT input is zero and the
output voltage is pulled down until a minimum allowable value is reached. At
this point the control circuit activates the switches again and the cycle starts
anew. This hysteretic control is well-known and employed in low standby-power
SMPS but never for a PT control. The main features of this control are presented
in the paper.
In any case, Piezoelectric Transformers are not yet usual devices in power
electronics converters, only a few companies develop this kind of elements and
several limitations have been detected along this work.
Single Stage
Resonant PFC Rectifier Based on LCT Integrated Device
K. Laouamri, J.-P. Ferrieux, J. C. Crebier
Laboratoire d'Electrotechnique de Grenoble
INPG/UJF UMR-CNRS 5529
ENSIEG, B. P. 46, 38402 Saint-Martin-d'Hères Cedex France
Phone: (33) 4 76 82 64 77 Fax: (33) 4 76 82 63 00
E-mail:
Khaled.Laouamri@leg.ensieg.inpg.fr
In the literature, several AC/DC converters are studied and presented. All kinds
of topologies and techniques are covered under this topic. This includes
single-switch, half-bridge and full bridge topologies as well as hard,
quasi-resonant and resonant switching. Different techniques are also developed
to control these converters ensuring high power factor. The aim of this paper is
to present a low-cost solution for low-power applications. A high frequency AC
to DC converter that respects the EN 6100-3-2 standard and suitable for
applications in the power range of 300 W, is presented. Its topology is based on
full-bridge series-resonant converter that operates below the half of resonant
frequency. The converter features zero-current for both turn-on and turn-off and
reduces switching-current for the output rectifier. These advantages make the
series-resonant topology suitable for operation at high frequency. Thus,
electromagnetic integration of the LCT network (Inductor-Capacitor-Transformer)
will be successfully applied owing to the fact that the values of the inductor
and capacitor are relatively small at this range of frequency. Computer
simulation and experimental results are presented.
Design and
Implementation of a Low-Cost High-Frequency Power Supply Family for Ozone
Generation
J. Marcos Alonso, María Valdés, Antonio J. Calleja, Javier Ribas
Universidad de Oviedo, DIEECS - Electrónica
Campus Viesques, Edificio 3
33204 - Gijón, Spain
Phone: +34 985 182087
FAX: + 34 985 182138
E-mail: marcos@ate.uniovi.es
http:// www.ate.uniovi.es
Julio Losada
ETRONECOLOGY
Plaza Primo de Rivera, 1
33001 Oviedo, Spain
Phone: +34 985 132903 FAX: +34 985 336743
E-mail: etron@netcom.es
http:// www.netcom.es/etron
A low-cost high-frequency power supply family for ozone generation is presented
in this paper. Firstly, the results obtained from the ozone reactor tested at
high frequency are presented, and a new model for its high frequency behavior is
proposed. Secondly, the basic power supply stage is presented and analyzed,
obtaining some important characteristics that allow the correct design of this
power converter. Around the proposed converter several models of power supplies
able to drive the ozone reactor from different ac and dc input voltages have
been developed. Simulation and experimental results are also provided to
evaluate the possibilities of the proposed converter.
By-Pass
Thyristor Based Method for Minimizing the Reactive Power Consumption in
Single-Phase Controlled Converter
A. A. Aboul-Naga, A. R. Amin, M. M. Atout
Mansoura University
Electrical Engineering Dept. Faculty of Engineering
Mansoura 35516, Egypt
Phone: (2050)-244403 / Fax: (2050)- 244690
E-mail: aboulnaga@mail.com
http://www.geocities.com/aaboulnaga/aly.html
Prof. Dr. A. R. Amin, Electrical Eng. Dept., Mansoura University, Egypt
Prof. Dr. M. M. Atout, Electrical Eng. Dept., Helwan University, Egypt
As a method for improving the input power factor of an AC-DC converter, a novel
by-pass thyristor technique is proposed. Its commutation mechanism is described.
The experimental and theoretical results are given which show a good input power
factor, a good waveform of line current and a wide adjustable range of DC output
voltage.
A New
Power-Factor-Correction Controller for the Current-Source Parallel Resonant
Rectifier based on the Quasi-Steady-State Approach
Miguel Castilla, Luis García de Vicuña, and Oscar López
UNIVERSIDAD POLITÉCNICA DE CATALUÑA
Departamento de Ingeniería Electrónica
Avda. Víctor Balaguer s/n, 08800 Vilanova i la Geltrú, Spain
Phone: 34 93 896.77.63
Fax: 34 93 896.77.00
mcastilla@eel.upc.es,
vicuna@eel.upc.es
This paper presents a simple control architecture for the high-power-factor
current-source parallel resonant rectifier, based on the quasi-steady-state
approach. In relation to traditional multiplier approach, the proposed
controller substitutes the multiplier circuit and the input-voltage sensor by a
multiplexer and low-pass filter, simplifying the control circuitry. Moreover,
the comparison of the line-current distortion of these controllers shows similar
performance.
A BIBRED with
improved output voltage
Vesa Tuomainen
Helsinki University of Technology
Institute of Intelligent Power Electronics
P.O. Box 3000, 02015-HUT
Helsinki, FINLAND
+358 09 451 5355 / +358 9 451 2432
vesa.tuomainen@hut.fi
Jorma Kyyrä
Helsinki University of Technology
Institute of Intelligent Power Electronics
P.O. Box 3000, 02015-HUT
Helsinki, FINLAND
+358 09 451 2436 / +358 9 451 2432
jorma.kyyra@hut.fi
BIBRED is a well-known Single-Stage AC/DC converter. It is able to produce an
input current with low harmonic content and a regulated and isolated output
voltage with only one switching stage. Input stage is kept in discontinuous
conduction mode and the duty ratio is kept essentially constant during a line
cycle in order to get a sinusoidal input current. This leads however to a
harmful voltage ripple on the output voltage at double line frequency and in the
worst case a low frequency oscillation between the output side capacitors of
BIBRED. The origin of the problem and the operation principles of the converter
are presented and discussed in the paper. A simple way to avoid the ripple on
the output voltage and to damp the oscillation without actively controlling the
circuit is presented in the paper. It is shown that a diode in series with the
output inductor attenuates the ripple at the output and confines the ripple to
the auxiliary capacitor at the secondary side of BIBRED. Simulated and measured
results are shown in the paper.
High-Power-Factor Isolated Resonant Rectifier Topology Using Quantum
Control
Miguel Castilla, Luis García de Vicuña, Josep Maria Guerrero, and Oscar López
UNIVERSIDAD POLITÉCNICA DE CATALUÑA
Departamento de Ingeniería Electrónica
Avda. Víctor Balaguer s/n, 08800 Vilanova i la Geltrú, Spain
Phone: 34 93 896.77.63
Fax: 34 93 896.77.00
mcastilla@eel.upc.es,
vicuna@eel.upc.es,
oscar@eel.upc.es
This paper presents a new third-order isolated series-loaded resonant circuit
using quantum control which operates as a high-power-factor rectifier. In
relation to conventional load-resonant converters, the proposed topology show
the next interesting features: low-input current distortion, step-down and
step-up operation, ZCS conditions, and peak current in power devices
proportional to load current.
Design and Analysis of Output Filter for UPS Inverter
Jaesik
Kim*,
Jaeho Choi*,
Frede Blaabjerg**
* CHUNGBUK NATIONAL UNIVERSITY
48 Gaesindong, Cheongju, S. KOREA
Tel: +82 43 261 2425, Fax: +82 43 276 7217
choi@power.chungbuk.ac.kr
** AALBORG UNIVERSITY
Pontoppicanstraede 101, Aalborg East, Denmark
Tel: +45 9635 9254, Fax: +45 9815 1411
fbl@iet.auc.dk
This paper proposes a design method of the L-C output filter for UPS inverter. There are two kinds of harmonic sources that make the UPS output voltage waveform be distorted: One is caused by the PWM switching of inverter but most of it can be eliminated by inserting the L-C filter in the output side of inverter. The other is caused by the nonlinear characteristics of the load current. If the output impedance of the UPS inverter is almost zero, then the output voltage waveform may be independent on the nonlinear load current characteristics. But the configuration of the power circuit with L-C filter cannot meet the zero-output impedance at all. The feedback controller complements the harmonic distortion due to the nonlinear load current. But the design value of L-C filter and the system performance of the controller are coupled each other and it is difficult to design the L-C filter considering the system performance of the controller in the conventional method. In this paper, the harmonic components caused by two different sources are analyzed separately based on the transfer function described as the closed form. The filter value can be calculated with the given value of system time constant determined by the switching frequency, the speed of control processor, and the controller gain. A design procedure is described by a single flow chart and explained step by step. The validity of the proposed filter design algorithm is verified through the simulation and experiments
High Power Factor Electronic Ballast for Tubular Fluorescent Lamp
Helder C. Silva; João A. Corrêa Pinto*; Ernane A. A. Coelho; Barreto L.H.S.C.;
Luiz C. de Freitas; Valdeir J. Farias and João B. Vieira Jr
Universidade Federal de Uberlândia
Faculdade de Engenharia Elétrica - Feelt
Campus Santa Mônica - Bloco “ 3N ”
38400-902 – Uberlândia - MG – Brazil
Phone/Fax: +55 34 3239-4166
Email: batista@ufu.br
*Centro Federal de Educação Tecnológica do
Coordenação de Eletrônica
Av. Almirante Barroso, 1155 – Bairro: Marco
CEP: 66.240-260 Belém - PA – Brazil
Phone: (5591)226-0122 Fax: (5591) 226-9710
Email: joao.pinto@cefetpa.br
A high power factor (HPF) electronic ballast, with low switching
losses, single power processing stage, that provides high frequency voltage to
the fluorescent lamps is presented. HPF
is achieved by using a nonconventional
boost converter operating in critical conduction mode.
Fast AC/ DC converter with nearly unity power factor using the resonant
current controller
J.C. Le Claire
GE44 – LARGE
Bd de l'Université - BP 406
44602 SAINT-NAZAIRE CEDEX, FRANCE
jclc@esa-igelec.gavysn.univ-nantes.fr
This paper describes a Power Factor Correction of an AC/DC power converter
using a recent Resonant Current Controller (RCC). The investigated converter
involves an input passive filter in order to remove the inter-modulation
frequencies due to the pulse modulation. The Resonant Current Controller
regulates the AC/DC inverter input current whose shape depends on the utility
waveform. Therefore, the RCC criterion is investigated. Thereafter, as the
chosen filter suits to the RCC operating modes, we target a nearly unity power
factor. Indeed, due to the accurate tracking of the RCC, the inverter input
current accurately tracks the network voltage waveform. Results demonstrate the
excellent RCC behaviour in the proposed scheme and agree with the simulated ones.
An Active Circuit to Obtain Symmetrical Power Supply Control
Montes Jr, N.L.; Bissochi Jr, C.A.; F. Vincenzi, R. S.;
Ernane A. A. Coelho and Barreto L. H.S.C.
Universidade Federal de Uberlândia
Faculdade de Engenharia Elétrica
Campus Santa Mônica - Bloco “3N”
38400-902 - Uberlândia - MG – Brasil
Phone/Fax: 55 34 239-4166
E-mail: batista@ufu.br
This paper presents a controlled symmetrical power supply. While feeding
unbalanced loads, the converter will operate in the switching mode, and the
circuit will only process the energy necessary to balance the output voltages.
Switches conduction losses depends on how unbalanced the loads are.
Multi-Resonant Soft-Switched Forward Type AC/DC Converter
Michihiko Nagao and Koosuke Harada
Energy Electronics Laboratory
Sojo University
4-22-1 Ikeda, Kumamoto, 860-0082
Japan
Tel:+81-96-326-3111
Fax: +81-96-326-3004
E-mail: nagao@ee.sojo-u.ac.jp
This paper presents a novel AC/DC converter circuit employing a multi resonance.
This converter is constructed basically by a forward type DC/DC converter and
connected only one resonance capacitor CR. The proposed converter accomplishes
high power factor and soft switching under constant switching frequency without
the feedback diode to reset the transformer.
A single-phase-stage buck rectifier with an output voltage wde range
V. FERNÃO PIRES * #
* Escola Superior Tecnologia de Setúbal, Instituto Politécnico de Setúbal, Rua
do Vale de Chaves, Estefanilha, 2914-508 Setúbal, phone: +351265790000, fax:
+351265721869,
email: vpires@est.ips.pt
# CAUTL – Centro Automática Univ. Técnica de Lisboa, Av. Rovisco Pais, 1, 1096
Lisboa Codex, phone: +351218417436, fax: +351218417167
In this paper a new single-phase single-stage Buck rectifier with low effects
on the main will be presented and discussed. This topology allows obtaining an
input source current presenting low harmonic content and behaving as high power
factor loads. The output voltage wide range is the main advantage over the known
topologies. In the known topologies the output voltage is lower than the peak of
the input ac voltage. For the new topology the output voltage is lower than the
double of the peak of the input ac voltage. Therefore the output voltage range
is increased two times. To achieve sinusoidal input current and high power
factor, sliding mode control of the input current is proposed. A Proportional
Integral (PI) controller is adopted to regulate the output voltage of the
converter.
DS3.2: Topic 4:
Application of control methods to electrical systems
(Betty Semail, EUDIL, France, J. L. Thomas, Alstom, France)
A FUZZY LOGIC-BASED LOAD FREQUENCY CONTROLLER: The Multi-Area Control
Problem
A. M. Abdel-Hamid
Assistant Prof., Department of Electrical Engineering, Faculty of Engineering,
El-Monoufia University, Shebin El-Kom (32511), Egypt.
E-Mail: abdelhamied@gmx.de
This paper extends a research work of fuzzy logic control application for
Load Frequency Control(LFC) of electric power system. A fuzzy logic algorithm is
proposed to control an interconnected multi area power system. The advantage of
the designed LFC controller is that its input signals can be taken centrally
from the tie line power which straightforwardly measurable at any individual
area. Accordingly, the high costs of local LFC at every station can be minimized.
A throughout examination of the membership functions has been executed in order
to get robust controller action even if the areas parameters are changing around
more than ±50% uncertainty factors. Using the tie line power as an input to the
fuzzy controller has proved that they include enough knowledge base to enable
this controller giving efficient damping to the frequency variations allover the
different interconnected buses.
INSENSIBLE CONTROL TO PARAMETER VARIATION APLLIED TO AN INDUCTION MOTOR: A
REFERENCE MODEL APPROACH.
S. Cauët, L. Rambault, E. Etien, G. Champenois
LAII-ESIP
40, avenue du Recteur Pineau
Poitiers , France
tel: 33(0)549453508/fax:33(0)549454034
e-mail:
sebastien.cauet@esip.univ-poitiers.fr
Abstract:
A linearized feedback system with a reference model is designed for an induction
motor. The use of a reference model enables the nearly decoupling between the
rotor speed and the rotor flux modulus which yields the independence of their
dynamics with respect to resistance and inductance deviations. An experimental
comparison test is carried out.
Real Time Induction Motor Drive Using Sliding Mode Linearization
Etien E Laboratoire d’Automatique et d’Informatique Industrielle
60 Avenue du recteur Pineau
86000 Poitiers, France
05.49.45.36.42 / Fax : 05.49.45.40.34
etien@esip.univ-poitiers.fr
In variable speed domain, many applications need high performances in term of
torque and accuracy. To obtain high performances, several control methods have
been developed few years ago. The variable structures of control methods were
developed principally in Russia since 1950. Sliding mode theory has been used
for Induction Motor (I.M) drive for a long time [1]. Introduce as a relative
easier control design, sliding mode using switched control produces chattering
phenomena and torque perturbations. Also, many solutions try to limit those
drawbacks by using smoothed nonlinearities. In an other hand, many methods of
non linear system control have been developed like linearization, backstepping
[2] , [3]. This paper shows the utilization of sliding mode theory, well known
by speed drive conceptors, in order to linearize the I.M behavior. Continuous
feedbacks are designed to limit the chattering problem and a model based
approach is used to impose motor state trajectories in despite of parameter
variations.
Fuzzy Adaptive Control Methods for Power Electronics Applications
António P. Martins, Adriano S. Carvalho
FACULTY OF ENGINEERING OF THE UNIVERSITY OF PORTO
Rua Dr. Roberto Frias, s/n, 4200-465, Porto, Portugal
Phone: +351 22 5081816; Fax: +351 22 5081443
e-mail: ajm@fe.up.pt,
asc@fe.up.pt
Fuzzy logic control application in power electronics is relatively new.
However, the superior performance obtained in some cases originated high quality
research in the difficult domains of controller adaptation and stability.
General stability results, as in conventional control methods, are not easy to
obtain and usually are associated with particular processes and controller
structures. In the field of adaptive fuzzy control, there are much more
quantitative and qualitative results. In this paper it is studied the
application of fuzzy adaptive control methods in power electronics and systems.
These applications are usually characterized by a known process structure but
with some poor knowledge of its dynamics, parameters and disturbances. This is a
major application area of fuzzy adaptive systems. In this paper it is discussed
different adaptive fuzzy control methods applied to power electronics and
systems and it is presented an illustrative example.
Anti-windup Circuits with On-line Optimisation by Genetic Algorithm
W.G. da Silva
Dep. of Electrical Engineering
Universidade do Estado de Minas Gerais
Instituto Superior de Ensino e Pesquisa de Ituiutaba - ISEPI
Ituiutaba - MG - Brazil
wander@ituiutaba.uemg.br
P.P. Acarnley and J.W.Finch
Dept. of Electrical and Electronic Engineering
University of Newcastle upon Tyne
Newcastle upon Tyne - United Kingdom
p.p.acarnley@ncl.ac.uk
j.w.finch@ncl.ac.uk
This work presents a study of some commonly used anti-windup circuits for use
with proportional-integral speed controllers for drive application in the
presence of load disturbance. Optimisation of the controller parameters and the
anti-windup settings is achieved on-line using a genetic algorithm. Experimental
results are presented to illustrate the efficiency of each anti-windup circuit.
Fuzzy Logic Control for Direct Torque Control Induction Motor Drives with
Inverter Controlled using Space Vector Modulation Technique
Yen-Shin Lai, Juo-Chiun Lin
Department of Electrical Engineering, National Taipei University of Technology
1, Sec. 3, Chuan-Hsiao E. Rd., Taipei, Taiwan
E-mail: yslai@ntut.edu.tw
Recent research results [1-3] have shown that using conventional PWM
technique for inverter control instead of switching table in a Direct Torque
Control (DTC) induction motor drive can effectively reduce the torque ripple
without invoking the increase of sampling frequency. However, three controllers,
including torque, flux and speed controllers, are required for DTC-based
induction motor drives with PWM inverter control. Moreover, the parameters of
controllers are usually decided by trial and error approach.
The objective of this paper is to present the applications of fuzzy logic
control to DTC-based induction motor drives with inverter controlled using space
vector modulation technique. It will be shown that the controllers are
implemented using PI-type fuzzy logic control and the presented DTC-based
induction motor drive has the features of fast response, disturbance rejection,
and low speed ripple. Experimental results derived from a test system will be
presented confirming the theoretical development.
Investigation into the Performance of Various Control Methods for Direct
Torque Control Induction Motor Drives
Yen-Shin Lai, Juo-Chiun Lin
Department of Electrical Engineering, National Taipei University of Technology
1, Sec. 3, Chuan-Hsiao E. Rd., Taipei, Taiwan
E-mail: yslai@ntut.edu.tw
The main theme of this paper is to investigate the performance of various
types control methods, including proportional-integral (PI) control, PI-type
fuzzy logic control (FLC), proportional-derivative (PD) type FLC, hybrid control,
and combination of PD-type FLC and I control, for direct torque control (DTC)
induction motor drives. The so-called hybrid control approach is a new method
presented in this paper, which consists of PI control at steady state, PI-type
fuzzy logic control at transient state, and a simple switching mechanism between
steady and transient states.
The pros and cons of these controllers will be demonstrated by intensive
experimental results. It will be shown that the proposed hybrid control approach
is with fast tracking capability, less steady state error, and robust to load
disturbance while not resorting to complicated or observer-based control method.
Neural Networks Implementation of Model Reference Adaptive Systems in
Induction Motor Drive
Jerzy Jelonkiewicz, Andrzej Przybył
Czestochowa University of Technology
Dabrowskiego 69
42-200 Czestochowa, Poland
tel. +48-343250549 fax. +48-343250546
jelon@kik.pcz.czest.pl,
przybyl@kik.pcz.czest.pl
http:// www.kik.pcz.czest.pl
In the paper four rotor speed estimators are considered, which are based on
Model Reference Adaptive Systems (MRAS). Then neural networks structures are
selected to implement the schemes. This approach offers more freedom to select
better set of input signals for the networks at the cost of open loop operation.
The best networks substituting reference model and adaptive model with
controller are compared to select the best configuration. Then the networks are
implemented in the DSP system It is expected that these networks can offer
additional features like better accuracy and insensitivity to motor parameter
variation.
An Input-Output Linearisation Based Sliding Mode Scheme For Induction
Motor Control Using A Sliding Mode Flux Observer
A. Benchaib C. Edwards
Power Electronics Research Team Control and Instrumentation Group
ALSTOM Technologies Engineering Department
9, rue Ampere University of Leicester
91345 Massy Leicester LE1 7RH
France United kingdom
This paper proposes a new scheme for induction motor control. The controller
is based on input-output linearisation and sliding mode techniques. Stator
currents are derived using input-output linearisation methods to ensure speed
and كux tracking. Thereafter, stator voltages are designed which seek to provide
stator current tracking using sliding mode ideas. The control scheme assumes
that only the motor speed and stator currents are measured and the observer
estimates the unmeasured flux components. Some simulation results are given to
show the performances of the scheme.
Neural networks rotor position estimators in PM synchronous motor drive
Jerzy Jelonkiewicz
Czestochowa University of Technology
Dabrowskiego 69
42-200 Czestochowa, Poland
tel. +48-343250549 fax. +48-343250546
jelon@kik.pcz.czest.pl
http://www.kik.pcz.czest.pl
In the paper different rotor position estimation methods without speed/position
sensors, applied in PM synchronous motor (PMSM), are considered. Then neural
networks are proposed to diminish computing requirements. It is expected that
these networks can estimate rotor position with high accuracy and can offer
other features like insensitivity to motor parameter variation.
Modeling And Control Aspects Of Active Magnetic Bearing
A.E. Hartavı , O. Ustun, R.N. Tuncay
Electrical Engineering Department
Istanbul Technical University
80626 Maslak-ISTANBUL/TURKEY
Tel: +90 212 285 67 75
Fax: +90 212 285 67 00
E-mail: hartavi@elk.itu.edu.tr,
ustun@elk.itu.edu.tr,
tuncay@elk.itu.edu.tr
This paper presents the design, control and experiments of a magnetic bearing
system, of which operation principle is based upon dc magnetic attraction.
Initially, electromechanical model is derived for representing dynamics of the
system. The magnetic bearing model is formed in virtual environment (VisSimTM)
and simulation results have obtained for various improper conditions such as the
deviation from balanced condition. Then, design optimization is achieved by
using FEM analysis and the results of the simulation is presented. Finally,
experimental set up is formed in which digital PD type controller is used for
obtaining a stable levitation. It is shown that, the system is levitated stable
at standstill.
Intelligent Battery Charger using Fuzzy Time Interval Method for Mobile
Applications
Darwin T.W. Liang
UNIVERSITY OF BRADFORD
Dept. of Electronics & Telecommunications
Bradford, England
(44) 1274 234039/391521(fax)
E-mail: d.t.w.liang@bradford.ac.uk
http://www.et.brad.ac.uk
Alberto Sanchez T.
ESCUELA POLITECNICA NACIONAL
P.O. Box 17-01-2759
Quito, Ecuador
(593) 2 507134 Ext. 311
E-mail: asanchez@uio.satnet.net
http://wwwfie.epn.edu.ec
An intelligent battery charger algorithm is presented using a fuzzy
rule-based time interval method. The proposed strategy is capable of
pre-determining the battery charge status prior to charging, and correctly
terminating the charging process without overcharging the battery beyond its
full capacity. The scheme is designed and implemented using a low-cost micro
controller chip as the brain to control a prototype power transistor charger.
Theoretical analysis are illustrated and explained. Experimental results are
presented for verification.
Comparison between fuzzy logic regulation and variable structure approach
applied to DC motor control
Franck Betin, A. Sivert, Daniel Pinchon
Institut Universitaire de Technologie de l’Aisne – CREA
15, avenue François Mitterrand, 02880 Cuffies - FRANCE
Tel: +(33) 3 23 76 40 24
Fax:+(33) 3 23 76 40 25
Email:
Franck.Betin@iut.u-picardie.fr
In this paper, two control strategies are used to control the position of a
DC motor drive. The first one is based on the fuzzy logic theory and the second
one is based on the variable structure approach. The designs of the two control
laws are completely different but the aims of the two algorithms are the same.
Indeed, when the parameters of the two controllers are correctly chosen, the
trajectories in the phase plane slides around the same line. The characteristics
of the two controllers are first presented and then the experimental results
obtained with an Intel 80C196kb microcontroller are depicted.
Control laws soft switching for a DC/DC converter
D. Alejo, P. Maussion and J. Faucher
Laboratoire d'Electrotechnique et d'Electronique Industrielle
Unité Mixte de Recherche INPT-ENSEEIHT / CNRS n° 5828
BP 7122 - 2 rue Camichel - 31071 Toulouse Cedex 7 – France
http://www.leei.enseeiht.fr
E-mail: alejo@leei.enseeiht.fr
maussion@leei.enseeiht.fr
faucher@leei.enseeiht.fr
This paper describes a new principle lying on soft commutation between two
control laws by the mean of fuzzy logic used to design a robust and simple
control law for a dc to dc converter. This soft switching between a classical IP
controller and a simple non-linear law provides significant dynamic and static
performances enhancement on simulation and experimental results. The tuning of
the fuzzy logic parameters is made through Hooke and Jeaves optimisation
procedure.
A solar battery charger for two modes of operation using a dc-dc buck
converter based on a Fuzzy Logic Controller
Rafael M. Lamaison, SergioVivas, Juan Peracaula
UPC - Universidad Politécnica de Cataluña
Diagonal 647 Planta 9, ETSEIB
08028 Barcelona, Spain
Tel. 34-93-4011098
Fax. 34-93-4017785
lamaison@eel.upc.es
In this paper a solar battery charger for two modes of operation using a
dc-dc buck converter based on a Fuzzy Logic Controller (FLC) has been worked
out. To improve energetic efficiency of a photovoltaic system an optimum power
transfer from the solar panel to its load is needed. A C++ language program to
simulate the system and the Fuzzy Logic Control in a closed loop scheme has been
developed. On the other hand, experimental results of the FLC operating in two
power modes of charges are presented. The two modes of charges are constant
current with voltage limited and constant voltage with current limited.
Generalized Model for Robustness Analysis of Positioning with Flux
Oriented Controlled Induction Machine
E. Laroche(1), Y. Bonnassieux(2), H. Abou-Kandil(2), J.P. Louis(2)
(1) Laboratoire des Sciences de l’Image, de l’Informatique et de la Télédétection (LSIIT),
Parc d’innovation, bd Sébastien Brant, F 67400 Illkirch
Phone : (33) 3 90 24 44 68 – Fax : (33) 3 90 24 44 80
Edouard.Laroche@ipst-ulp.u-strasbg.fr
(2) Laboratoire d’Electricité, Signaux et Robotique (LESiR),
61, av. du président Wilson, F 94235 Cachan
Phone : (33) 1 47 40 53 44 – Fax : (33) 1 47 40 24 31
Yvan.bonnassieux@lesir.ens-cachan.fr
A model is presented in this paper allowing
robustness evaluation via
m‑analysis
of systems including induction motors with flux oriented control (FOC). The
system considered is composed of an induction motor connected to a mechanical
load via a flexible joint. Parameter uncertainties are simultaneously
considered on both electric and mechanical parts. The model of flux oriented
controlled induction machine, accounting for parameter errors, is developed and
transformed in a shape ad-hoc for robustness analysis.
m‑analysis background is presented and results are given in the
case of a controller designed with H¥ “loop-shaping” method.
An energy efficient self-adjusting speed controller for industrial DC
motor drives
A.M.Sharaf * , S.I. Abu-Azab
Electrical Engineering Department
United Arab Emirates University
Al-Ain, P.O. Box 17555, U.A.E.
A.sharaf@uaeu.ac.ae
* Presently a professor of electrical engineering at the university of New
Brunswick, Fredericton, N.B.
CANADA E3B5A3
A.sharaf@unb.ca
The paper presents a novel self adjusting speed (SAC) controller comprising
two dynamic error regulation loops (speed and power) to ensure effective speed
reference tracking as well as power/energy conservation for common cyclical
loads driven by industrial large DC motor drives.
Neural Network Based Predictive Control of Electrical Drives with Elastic
Transmission and Backlash
Ivan Petrović, Zoran Rac, Nedjeljko Perić
UNIVERSITY OF ZAGREB, FACULTY OF ELECTRICAL ENGINEERING AND COMPUTING,
DEPARTMENT OF CONTROL AND COMPUTER ENGINEERING IN AUTOMATION
Unska 3
Zagreb, Croatia
Phone number/Fax number: +38516129844/+38516129809,
e-mail: ivan.petrovic@fer.hr
http://www.rasip.fer.hr/act
A control strategy based on generalized predictive controller (GPC) is
proposed for control of electrical drives with transmission elasticity and
backlash. Neural network based model is used for identification of the two-mass
mechanical system with elastic transmission and backlash with negligible
friction. It is assumed that only measurement at the load side is available.
Since GPC controller requires linear process model, neural model is linearized
by means of instantaneous linearization in each sample instant. This control
strategy is then compared to the classical GPC based on linear process model by
computer simulations and experimentally on a laboratory model of the electrical
drive with transmission elasticity and backlash.
Supervisory Control of Multiple AC Motors Coupled Through Mechanical Stiff
Shaft
Zbigniew Nowacki, Sławomir Sikora, Andrzej Jezierski
Technical University of Lodz
Lodz, Poland
Tel.: +48 42 6312556, Fax: +48 42 6312551
znowacki@ck-sg.p.lodz.pl
The important problem in the multiple AC motors coupled through mechanical
stiff shaft drives is non-uniform load distribution. This article introduces the
structure of laboratory model of AC multi-motor drive system along with its
supervising control unit. The results of laboratory and simulation tests are
presented.
Speed-Sensorless Control of An Induction Motor Using Fuzzy Logic
Daniel PIRJAN, Francis LABRIQUE, Paul SENTE
UNIVERSITE CATHOLIQUE DE LOUVAIN
3 Place du Levant
Louvain La Neuve 1348, BELGIUM
Phone:++32 10 47 2250
Fax: ++32 10 47 8667
E-mail: pirjan@lei.ucl.ac.be
labrique@lei.ucl.ac.be
sente@lei.ucl.ac.be
The paper presents the experimental results obtained with a speed-sensorless
FOC of an induction motor (IM) supplied by a PWM-Voltage Source Inverter (VSI).
The speed tuning signal is estimated with a model reference adaptive system (MRAS)
observer which uses the back e.m.fs quantities. Mamdani’s fuzzy logic
controllers (FLC) are used for the speed controller and also for the MRAS
controller.
Flux-guided
control strategy for pulse pattern changes without transients of torque and
current for high power IGBT-Inverter drives
Evers, Christoph
Ruhr-Universität Bochum
Institute for Generation and Application
of electrical Energy
D-44780 Bochum
Phone: ++49 234 / 32 24642
Fax: ++49 234 / 32 04642
evers@eaee.ruhr-uni-bochum.de
Wörner, Kai
Ruhr-Universität Bochum
Institute for Generation and Application
of electrical Energy
D-44780 Bochum
Phone: ++49 234 / 32 24642
Fax: ++49 234 / 32 04642
woerner@eaee.ruhr-uni-bochum.de
Hoffmann, Frank
Siemens Transportation Systems
TS GT E3
Günther-Scharowsky Str. 1
D-91058 Erlangen
Phone: ++49 9131 / 7 35151
Fax: ++49 9131 / 818 35151
frank.2.hoffmann@ts.siemens.de
Steimel, Andreas
Ruhr-Universität Bochum
Institute for Generation and Application
of electrical Energy
D-44780 Bochum
Phone: ++49 234 / 32 23890
Fax: ++49 234 / 32 14597
steimel@eaee.ruhr-uni-bochum.de
A flux-guided regime for pulse pattern
changes (PPC) of quasi-synchronous pulse patterns without unwanted transients
for high power inverter drives is presented. Contrasting known timer-controlled
strategies the orientation at the stator flux guarantees predictable
distortions in torque and current at the PPCs, too. Characteristics are
explained and verified by measurements.
DS3.3: Topic 6:
Adjustable speed drive systems
(B. Davat,
ENSEM-INPL, France)
Stability analysis of digital current vector control of
ac-machines
Martin Riese and Jochen Bechtler
Heidelberger Druckmaschinen AG
Kurfürstenanlage 52-60, D-69115 Heidelberg, Germany
Martin.Riese@de.heidelberg.com,
Jochen.Bechtler@de.heidelberg.com
Current vector control based on the discrete model of ac-machines has been shown
to enable fast torque impression and decoupling of field- and quadrature axis
currents. The respective controller design may however lead to an unstable
disturbance response, depending on the motor parameters. A solution is presented
and verified by measured results.
A Medium Voltage AC Drive with Active Front End And
Improved Performance
Navid Zargari Manish Pande Jason Wiseman Steven
Rizzo
ROCKWELL AUTOMATION
135 Dundas St.
Cambridge, ON, CANADA N1R-5X1
tel: 519-740-4100-2208, fax: 519-740-4163
nrzargari@ra.rockwell.com
A new Curent Source Inverter (CSI)-based Medium
Voltage ac drive with Active Front End (AFE), sensorless vector control and
Symmetric Gate Commutated Thyristors (SGCTs) is presented. The paper emphasizes
a PWM rectifier front end since this configuration can meet the IEEE-519
requirements without the need for an isolation or multi winding transformer. The
proposed drive operates the SGCTs with minimal snubbers and at a higher
switching frequency than GTOs. This results in a reduction in the size of the
filter components and improved performance characteristics while maintaining
minimum component count. The paper describes the direct sensorless vector
control adapted for Current Source inverters and focuses on the implementation
and application issues of the PWM rectifier and the control strategy. Two 4160V
drives (600hp and 1250hp) are tested and the steady state and dynamic response
to load/speed changes is presented and discussed.
Variable-Speed Asynchronous Drives Employing Structural Harmonic
Elimination Techniques
P. Bolognesi, D. Casini, L. Taponecco
Department of Electrical Systems and Automation - University of Pisa
Via Diotisalvi 2 - 56126 Pisa - Italy - tel. +39-050-565111 - fax +39-050-565333
http://www.dsea.unipi.it
e-mail:
Paolo.Bolognesi@DSEA.UniPi.It
It still exists many practical applications of induction motors whose
performance requirements are limited to soft startup and gross speed
adjustability with acceptable torque profile, while a low drive cost constitutes
a key issue. In such cases, conventional solutions are still employed since
advanced inverter drives result usually not attractive for such purposes, due to
a too high cost / actual benefits ratio. This paper proposes the application of
simple structural harmonic elimination methods as low-complexity modulation
techniques for low-end, low-cost inverter drives for induction motors employing
the scalar V/f regulation strategy. The employ of a very simple control system,
a low switching frequency inverter and a standard single-winding motor should in
fact permit to offer such drives with a limited overcost with respect to
conventional solutions, which could be accepted considering the achievable
adjustability improvements.
Design considerations and simulation results are reported.
Single Phase Mains Supplied Variable Speed Induction Motor Drive
Peter Lürkens
Philips Research Laboratories
Aachen, Germany
+49-241-6003-259/+49-241-6003-465
peter.luerkens@philips.com
http://www.research.philips.com/
A new control method allows to operate a 3-phase induction motor with a
simple voltage source inverter from the single-phase mains with low mains
harmonics at a wide speed range. No electrolytic capacitors are required anymore.
Even the torque ripple can be low. The control method implements a kind of
inverse compensation of the DC bus voltage which removes all frequency
components from the motor phase voltage except two, symmetrical to the modulator
frequency.
Large Capacity High Efficiency Three-Level GCT Inverter System for Steel
Rolling Mill Drives
Masato Koyama*, Yasuhito Shimomura*, Hiroaki Yamaguchi*, Makoto Mukunoki*, Hideo
Okayama**, Shoji Mizoguchi*
Mitsubishi Electric Corporation
*1-1-2, Wadasaki-cho, Hyogo-ku, Kobe 652-8555, JAPAN
*TEL:+81-78-682-6852, FAX:+81-78-682-6238
**8-1-1, Tsukaguchi Honmachi, Amagasaki, 661-8661, JAPAN
*E-mail address:
koyamam@pic.melco.co.jp
The number of large capacity voltage source inverters using GTO thyristors
applied to steel rolling mill drives is increasing due to their advantages such
as high power factor and high output frequency. Further improvement in power
conversion efficiency is desired for these voltage source inverters. This paper
presents a new large capacity (12MVA) high efficiency three-level inverter using
GCT thyristor with world’s largest capacity of 6kV/6kA. In this paper, we
describe several key techniques such as high performance GCT gate drive circuit
and snubber-less main circuit developed to realize this new GCT inverter. Some
experimental results are shown to demonstrate that the developed GCT inverter
has enough robustness and reliability to be applied for the steel main rolling
mill drives.
High Performance Anti-Windup Control for Speed Servo System of Vector
Controlled Induction Motor
Kiyoshi Ohishi and Emiko Hayasaka
Department of Electrical Engineering, Nagaoka University of Technology
1603-1 Kamitomioka-cho, Nagaoka-city, NIIGATA, 940-2188, Japan
Phone: +81-258-47-9525, FAX: +81-258-47-9500
e-mail: ohishi@vos.nagaokaut.ac.jp
Generally, a speed servo system of vector-controlled induction motor has a
limitation of motor volt-age and motor current. When the speed servo system has
a large torque reference, the output of its PI
controller is often saturated. In this case, the conventional servo system stops
the integral calculation of its PI controller. However, this system often has a
large overshoot and or an oscillated response caused by both a windup phenomenon
and phase error on vector control condition. This paper proposes a new
anti-windup control method for the speed servo system of vector-controlled
induction motor. The pro-posed method compensates the phase error on vector
control condition, and always keeps the vector control condition. The
experimental results show that the proposed system well regulates a motor speed
and a motor secondary magnetic flux for a large torque reference without a
windup phenomenon.
Power Converter Filtering Techniques design for Very High Speed Drive
Systems
M.Carpita*,
D. Colombo*, A. Monti^, A. Fradilli°
*ABB Ricerca,
viale Edison 50, Sesto San Giovanni,
20099 Milano,
Italy
mauro.carpita@it.abb.com
dario.colombo@it.abb.com
University of South Carolina,
Columbia (SC),
USA
MONTI@engr.sc.edu
P.zza
Leonardo da Vinci 32, 20133 Milano,
Italy
Recently industry started to show interest on very high speed, high power
drives. In designing this kind of drives several problem must be faced, both on
the power converter and on the motor. ABB is now studying an experimental high
power, high speed drive based on PM motor.
One of the main problems in designing the drive is to supply the motor with a
good voltage waveform from the harmonics point of view. One possible solution is
to put a suitable passive filter between the power converter and the motor. In
this paper three different solutions are described: a complete passive power
filter, a decoupled control with passive filter and a sliding mode approach.
High Efficiency Vector Control System Using Open-Winding Motor and Two Space
Vector Modulated Inverters
Yoshitaka Kawabata
Osaka Prefectural College of Technology
Saiwai-cho 26-12, Neyagawa, Osaka, 572-8572, JAPAN
TEL: +81-72-821-6401, FAX: +81-72-821-0134
kawabata@ecs.osaka-pct.ac.jp
Motoshi Nasu, Tomoyuki Kawakami, Emenike Ejiogu and Takao Kawabata
Ritsumeikan University
Nojihigashi 1-1-1, Kusatsu, Shiga, 525-8577, JAPAN
TEL: +81-77-566-1111, FAX: +81-77-561-2663
kawabata@se.ritsumei.ac.jp
This paper proposes a new high efficiency drive system using an open-winding a.c.
motor and two space vector modulated inverters. This configuration consists of a
3-level inverter with switching at once every cycle and a 2-level inverter of
about 1kHz switching frequency, connected respectively to the opposite terminals
of the open-winding a.c. motor. With the proposed configuration, good current
waveforms, low acoustic noise and high efficiency can be obtained. Moreover,
this space vector modulation system is suitable for the vector control
DSP-BASED
INTELLIGENT MOTION CONTROL
S. Beierke / J.C. Soroka
Texas Instruments
D-85350, Freising
Germany
Tel.: +49-8161-804885 / +33 -49322 2410
Fax: 49-8161-804310
E-mail: sbei@ti.com /
jc-soroka@ti.com
P. Vas
Department of Engineering
University of Aberdeen
Aberdeen, AB24 3UE
United Kingdom
Tel.: 44-1224-272818
Fax: 44-1224-272497
E-mail: p.vas@eng.abdn.ac.uk
At present there is a rapid increase in the number of digital signal processors
(DSPs) for various motion control applications. However, a very significant
further increase is expected in the near future due to wider applications in
existing and new areas: domestic appliances, automotive auxiliaries,
micro-electromechanical systems, military systems, etc. The present paper
discusses the state-of-the-art Texas Instruments (TI) fixed point and floating
point DSPs used in motion control applications and will also focus on future
activities.
A High Performance Sensorless Induction Motor Drive for use in Multi-Motor
Speed Synchronised Applications
G. Turl, M. Sumner and G. M. Asher
School of Electrical and Electronic Engineering
The University of Nottingham, University Park
Nottingham NG7 2RD, UK
Tel: +44 (0) 115 9515549
Fax: +44 (0) 115 9515616
Email: gt@eee.nottingham.ac.uk
http://www.eee.nottingham.ac.uk/power/
This paper presents a high performance sensorless induction motor drive that is
based on the machine electrical model and tuned by a robust speed estimate. This
estimate is obtained from an adaptive algorithm tracking rotor slot harmonics
that appear in voltage and current quantities. The resultant system is tested
for use in multi-motor, speed synchronised drives, an application typically
requiring encodered performance. Excellent system performance is demonstrated on
a dual 4kW experimental rig.
Design of a Compact BLDC motor for Transient Applications
Y.K. Chin, W.M. Arshad, T. Bäckström & C. Sadarangani
Royal Institute of Technology (KTH)
Department of Electrical Engineering
Teknikringen 33, SE-100 44
Stockholm, Sweden
Tel: + 46 8 790 7757 Fax: + 46 8 205 268
E-mail: Robert.chin@ekc.kth.se
http://www.ekc.kth.se/eme/
Applications such as emergency breakers, protective devices in explosive
environments, emergency exit openings etc. fall into a broad category that can
be grouped under a general term transient applications. This paper presents a
compact brushless permanent magnet (BLDC) motor design for those short time
operations. Design procedures for both interior and exterior rotor BLDC
configurations are described. Design analysis is verified by testing and
building a prototype motor. It is found that the most critical design criterion
is to avoid magnet demagnetisation. A thermal check on the design is always
advisable although thermal loading is negligible.
Instantaneous
Power Control of Induction Machines
R.E. Betz
Department of Electrical and Computer Engineering
University of Newcastle, Callaghan, NSW, Australia.
TEL: +61-2-4921-6091, FAX: +61-2-4921-6993
Email:
reb@ecemail.newcastle.edu.au
http://www.ee.newcastle.edu.au/users/staff/reb
B.J. Cook
Department of Electrical and Computer Engineering
University of Newcastle, Callaghan, NSW, Australia.
TEL: +61-2-4921-6022, FAX: +61-2-4921-6993
Email:
brian@ecemail.newcastle.edu.au
http://www.ee.newcastle.edu.au/users/staff/brian/Brian.html
High performance induction machine control is usually implemented using field
oriented control (FOC) or direct torque control (DTC). These strategies both
have their strengths and weaknesses. The concept of instantaneous power control
(IPC) has been used previously in power compensators and to control the voltage
on the DC link of drive systems, but it is a new concept for the control of
induction machines. By simultaneously controlling the instantaneous real and
imaginary power flowing into the machine it is possible to control the machine’s
instantaneous torque and flux. The algorithm to achieve this is more robust to
machine parameter inaccuracies compared to the classical field oriented control,
and is capable of similar dynamic performance to field oriented and direct
torque control. This paper develops the IPC algorithm, and then presents
simulation results of its performance. Special emphasis is given to the effects
of practical issues such as parameter accuracy and inverter dead time on the
performance of the algorithm.
A cost optimised direct drive for low-speed industrial applications
Göran Göransson Lars Sjöberg Jürgen Reinert
Emotron AB
Mörsaregatan 12, 250 24 Helsingborg
Sweden
Tel. +46 42 16 99 63/ Fax +46 42 16 99 49
goran.goransson@emotron.se,
lars.sjoberg@emotron.se,
jurgen.reinert@emotron.se,
http://www.emotron.se
This paper entails the selection of a drive suited best for applications
demanding variable low-speed operation at low production costs and high
reliability. According to the specification, different possible drives are first
compared to each other before detailed design considerations for the chosen
solution, a 3‑phase switched reluctance drive, is presented. Along with
experimental results, considerations for a cost optimised motor and converter
design are given.
Speed Control of an Induction Motor with Acceleration Feedforward Control
Jae-Wang Lee, Sang-Hoon Kim
Electrical and Computer Engineering Dept. of Kangwon National University,
Chunchon, Korea (ZIP 200-701)
Tel. : +82-33-250-6293 Fax. : +82-33-241-3775
E-mail : kshoon@cc.kangwon.ac.kr
In this paper, a novel speed control strategy using an acceleration
feedforward compensation by the estimation of the system inertia is proposed.
With the proposed method, the enhanced speed control performance can be achieved
and the speed response against the disturbance torque can be improved for the
vector-controlled induction motor drive systems in which the bandwidth of the
speed controller cannot be made large enough. The simulation and experimental
results confirm the validity of the proposed strategy.
Modeling and Optimal Integration of a FPGA-Based Position Estimator for
Sensorless Controller of Fully-Pitched Winding Reluctance Motor Drives
Y.A. Chapuis(1),
Y. Kebbati(1), T. Kosaka(2), N. Matsui(2)(1):LEPSI-IN2P3-ULP Strasbourg
23
rue du Loess, 67037 Strasbourg, France
Tel :
(33)(0)3 90 24 28 64 / Fax : ~ 28 70
e-mail :
chapuis,kebbati@lepsi.in2p3.fr
http://www-lepsi.in2p3.fr
(2) :Department of Electrical and Computer Engineering. Nagoya Institute
of Technology.
Gokiso
Showa, Nagoya 466-8555, Japan.
Tel :
(81) 52 735 5420 / Fax : ~5442
e-mail :
kosaka,matsui@elcom.nitech.ac.jp
http://www.elcom.nitech.ac.jp
This paper present a FPGA solution for a fuzzy logic based-position estimator
of a sensorless controller of fully-pitched winding reluctance motor drives. A
modular architecture of a position estimator is proposed in order to reach
flexible and optimization performances of integration. Indeed, IC design can
increase the specificity of a digital controller by exploiting the parallelism
presented in most algorithms. Moreover, this solution can reduce the cost of the
implementation by only use the necessary hardware. The aim of the integration is
to relieve and to speed up the DSP calculation tasks while improving control
results A modular architecture approach is proposed by decomposing the general
algorithm of the position estimator in specific module architectures. Afterwards,
these modules which are designed, synthesized and valid by simulation from VHDL
models. Behavior simulation results of the FPGA are obtained by post-simulation
and delay retro-annotation using Altera components library. Hardware results of
position estimator integration will be also done.
DTC Strategy for
Multi-machine Multi-inverter industrial System
J. Belhadj(1)(2), I. Belkhodja(1), B. De Fornel(3), M. Pietrzak-David(3)
LSE-ENIT, BP 37 le Belvèdère 1002 Tunis-Tunisia, Tél (216)1874700,Fax (216) 872 729
ESSTT, 5 Av. Taha Hussen 1008 Tunis-Tunisia, Fax (216) 1 391 166
Jamel.belhadj@esstt.rnu.tn , ilhem.belkhoja@enit.rnu.tn
(3) LEEI, UMR-INPT-ENSEEIHT/ CNRS, BP7122, 2 Rue Camichel, Toulouse Cedex 7 France, Tél (33) 561588208, Fax (33) 561620976
Bernard.de.fornel@leei.enseeiht.fr , Maria.david@leei.enseeiht.fr
The basic aim of this paper is to apply the Direct Torque Control (DTC) strategy to an industrial multi-machine multi-inverter system. Different functioning scenarios are analyzed to study the complexity of this system. Mechanical and electrical couplings constitute the principal operation difficulty of this system mainly when one of the machines is perturbed. Speeds and tension controls are designed and their performances are analyzed and compared with those obtained with a Flux Oriented Control (FOC).
Symetrisation of
asymetrical short-circuits in IGBT drives
A.Colasse, L. Delporte, J-E. Masselus
ALSTOM Belgium / Transport
BP 4211
B-6001 Charleroi, Belgium
M. Osée, P. Mathys
ULB Elmitel
Av. Roosevelt, 50 CP 165/56
B-1050 Brussels, Belgium
This paper presents the implementation of a protection strategy to reduce the
transient overtorque of an induction motor in case of failure of the IGBT
voltage source inverter feeding this motor.
The protection strategy is applicable to 2-level and 3-level inverters and was
implemented on several railways vehicles.
Different Control Strategies for Three-phase PWM Inverters
Mourad Fathallah
*, Francis Calmon **, Christian Gontrand *, M. H. El-husseini *, Jean Pierre
Chante *
* Centre de Génie Electrique de Lyon - INSA de Lyon
** ST Microelectronics - Grenoble, France
mourad@cegely.insa-lyon.fr
This paper presents a novel VHDL
architecture aimed to optimize the integration of control algorithms for
asynchronous motors and to develop digital modeling strategies in order to
master the design and analysis of large and complex systems. Algorithms and
methods to implement an ASIC has been studied in this work with the aim to
offer an optimized solution to the IC designer. It is also question of a
general purpose study on different implementation approaches applied to motor
regulation. The designed control IC can be incorporated with a digital signal
processor (DSP) to provide an effective solution for high-performance ac
drives. Simulations and experimental tests gave entire satisfaction.
Vector controlled
induction drive system for direct driven electrical vehicle
Khawatmi , M.
University of Pisa / Italy - Dept. of Electrical System and Automation (DSEA)
E-mail khawatmi@dsea.unipi.it.
Tel.+39. 050 565348 Fax.+39. 050 565333- 2, Diotisalvi St. I - 56126 Pisa /
Italy
The paper deals with a new method for simultaneous speed and rotor resistance
estimation in vector controlled induction motor drive system, with emphasis on
its’ application in Direct Driven Electrical Vehicle. The direct rotor field
orientation method has been chosen as vector control strategy. In order to
estimate the rotor flux components, a Robust Adaptive Flux Observer has taken
into consideration [1,3]. The simultaneous speed and rotor resistance estimation
is performed only using the model of the induction motor together with
statistical algorithms
Implementation of Modified MRAC to Drives Control
Petar Crnozija and Keljko Ban
University of Zagreb, Faculty of Electrical Engineering and Computing
Unska 3, HR-10000 Zagreb, CROATIA
Phone: + 385 1 6129 848, Fax: + 385 1 6129 809
E-mail: petar.crnosija@fer.hr
Yurij A. Bortsov
State Technical University
Sankt Petersburg, Prof. Popov Street 5, RUSSIA
Model reference adaptive control and self-tuning controller are the most
frequently used adaptive methods. Model reference adaptive control with
parameter adaptation and self-tuning controller need more iteration for optimal
tuning of controller parameters and new tuning of controller parameters for
changed plant parameters. The main advantage of a model reference adaptive
control scheme with signal adaptation is that it acts optimally in the first
change of reference and disturbance value and that it does not need new tuning
for changed plant parameters. The implementation of reference model and signal
adaptation algorithm for adaptive control of electrical drives is discussed. The
basic structure of an MRAC with signal adaptation algorithm is described. The
modified structure of a signal adaptation mechanism with adjustable reference
model of a plant and/or adjustable observer, which eliminates high frequency
oscillation from the plant is described. An MRAC with a modified signal
adaptation algorithm has been implemented on a dc motor drive. The presented
oscillograms show that the influence of parameter variation and load torque can
be quickly and significantly reduced by using the plant reference model and
modified signal adaptation algorithm.
Flux-guided control strategy for pulse pattern changes without transients of
torque and current for high power IGBT-Inverter drives
Evers, Christoph
Ruhr-Universität Bochum
Institute for Generation and Application
of electrical Energy
D-44780 Bochum
Phone: ++49 234 / 32 24642
Fax: ++49 234 / 32 04642
evers@eaee.ruhr-uni-bochum.de
Wörner, Kai
Ruhr-Universität Bochum
Institute for Generation and Application
of electrical Energy
D-44780 Bochum
Phone: ++49 234 / 32 24642
Fax: ++49 234 / 32 04642
woerner@eaee.ruhr-uni-bochum.de
Hoffmann, Frank
Siemens Transportation Systems
TS GT E3
Günther-Scharowsky Str. 1
D-91058 Erlangen
Phone: ++49 9131 / 7 35151
Fax: ++49 9131 / 818 35151
frank.2.hoffmann@ts.siemens.de
Steimel, Andreas
Ruhr-Universität Bochum
Institute for Generation and Application
of electrical Energy
D-44780 Bochum
Phone: ++49 234 / 32 23890
Fax: ++49 234 / 32 14597
steimel@eaee.ruhr-uni-bochum.de
A flux-guided regime for pulse pattern changes (PPC) of quasi-synchronous
pulse patterns without unwanted transients for high power inverter drives is
presented. Contrasting known timer-controlled strategies the orientation at the
stator flux guarantees predictable distortions in torque and current at the
PPCs, too. Characteristics are explained and verified by measurements.
DS3.4: Topic 6:
Sensorless techniques
(E. Levi,
Liverpool John Moores University, UK)
Diagnosis by
parameter estimation of stator and rotor faults occuring in induction machines
S. Bachir*,**, S. Tnani*, J. C. Trigeassou*, G. Champenois*
* Laboratoire d’Automatique et d’Informatique
Industrielle
40, avenue du Recteur Pineau, 86020 Poitiers Cedex, France.
** Moteurs LEROY SOMER, Direction Scientifique, 16015 Angoulème Cedex, France
Phone : (33) 5 49 45 36 43 / Fax : (33) 5 49 45 40 34
E-mail :
Smail.Bachir@esip.univ-poitiers.fr
The
authors propose a new diagnosis method for simultaneous stator and rotor faults
in induction motors. This method is based on parameter estimation of the new
Park’s model, developed to take into account inter turn short-circuits of
stator windings and broken rotor bars. A diagnosis procedure has been validated
on real faulty experiments.
Doubly-fed a.c.
machines: classification and comparison
B. Hopfensperger
(formerly University of Newcastle upon Tyne)
Siemens AG, Automation & Drives
Frauenauracherstr. 80, 91056 Erlangen, Germany
Tel: +49-(0)9131-98-2744
bernhard.hopfensperger@erlf.siemens.de
D.J. Atkinson
Dept. of Electrical and Electronic Eng.
University of Newcastle upon Tyne
Newcastle upon Tyne, NE1 7RU, U.K.
Tel: +44-(0)191-222-8357
dave.atkinson@newcastle.ac.uk
A doubly-fed machine is a three phase a.c. machine with two accessible three
phase windings from which power can be fed to or extracted from. This paper
classifies and describes the various types of such an electrical machine with
their potential in variable-speed constant-frequency applications. Construction
issues, frequency behaviour, power flow, modeling and control are the main focus
points. Covered machines are the single doubly-fed (wound rotor ) induction
machine (SDFM), the cascaded doubly-fed induction machine (CDFM), the
single-frame cascaded doubly-fed induction machine (SF-CDFM), the so-called
brushless doubly-fed induction machine (BDFM), the doubly-fed reluctance machine
(DFRM) and the tandem induction machine (TIM). A comparison list concludes this
machine overview.
Speed Sensorless Vector Control of Parallel Connected Dual Induction Motor
Yusuke KONO, Hirotoshi KAWAI, Shinichi YOKOMIZO and Kouki MATSUSE
Dept.of Electrical Engineering, Meiji University
1-1-1, Higashimita, Tama-ku, Kawasaki 214-8571, JAPAN
Phone / Fax 81-44-934-7293
E-mail:matsuse@isc.meiji.ac.jp
The purpose of this work is to present the speed-sensorless vector control
method of the torque production from each rotor of two induction motors with
parallel connected stator windings fed by a single inverter. In this paper an
adaptive rotor flux observer is applied to the method in order to eliminate a
flux sensor, and an adaptive scheme for rotor speed is added to the adaptive
rotor flux observer in order to eliminate a speed sensor. The experimental
results show that the proposed method is useful under the rating of each
induction motor are different.
BLDC motor position detection at standstill
F. Bonvin and Y. Perriard
Swiss Federal Institue of Technology, Electromechanical Institute (EPFL-LEME)
ELG-Ecublens, CH-1015 LAUSANNE, Switzerland.
Phone number : ++41.21.693.2692, Fax Number : ++41.21.693.20.50
frederic.bonvin@epfl.ch,
yves.perriard@epfl.ch
In some applications, it is interesting to know the position of a BLDC Motor
at standstill. This paper propose one solution using the saturation property of
the motor. Principle, simulation and measures are presented. The results of
industrial applications are exposed and discussed. Several preview works has
been done on this subject. The purpose of this paper is to present a new method
allowing to enhance the precision up to 2.
Furthermor, the method can be applied to all type of brushless DC motors, even
with airgap or toothless ones.
Microcomputer-based control system for drives with resilient couplings
Maciej Tondos
University of Mining & Metallurgy
Al. Mickiewicza 30, 30-059 Kraków, Poland
phone: (+48 12) 617 39 21, fax: (+48 12) 637 40 35
e-mail: tondos@uci.agh.edu.pl
Wojciech Mysiński
Technical University of Cracow
ul. Warszawska 24, 31-155 Kraków, Poland
phone: (+48 12) 628 26 98, fax: (+48 12) 628 26 54
e-mail: mysinski@usk.pk.edu.pl
This paper is concerned with principles of the estimation of non-measurable
state variables and external torque load in drives with an elastic motor shaft (two
mass system). In many drive systems, the use of resilient couplings between the
motor and the processing machine, due to elastic shafts and gears, is often
unavoidable. In this paper, speed control for torsional vibration suppression in
a 2-mass motor drive system is studied. The speed control method which uses a
state and disturbance observer with a PI controller has a better control
response than a typical PI speed controller.
Estimating the Back-EMF of an Induction Motor
Veli-Matti Leppänen and Jorma Luomi
Helsinki University of Technology
Institute of Intelligent Power Electronics
P.O. Box 3000, FIN-02015 HUT, Finland
+358 9 451 4966
Fax +358 9 460 224
E-mail: veli-matti.leppanen@hut.fi
Information about the back-emf of an induction motor can be used in various
control and estimation schemes. This paper proposes a simple method for fast
tracking of the back-emf based on the evaluation of the derivative of the stator
current during a PWM switching period. No prior knowledge of motor parameters is
needed. Simulation results show that the estimated back-emf is in close
agreement with the actual one even under transient conditions.
Speed Sensorless Sliding Mode Torque and Flux Control of Induction Motor
with Stator Resistance Adaptation Algorithm
Miran Rodič, Karel Jezernik
University of Maribor, Faculty of Electrical Engineering and Computer Science
Smetanova 17
Maribor, Slovenia
Tel. (++386 2) 220 7308 / Fax. (++386 2) 220 7315
e-mail: miran.rodic@uni-mb.si,
karel.jezernik@uni-mb.si
http://www.ro.feri.uni-mb.si
Speed sensorless induction motor torque and flux tracking control algorithm
is presented. Proposed approach addresses the problem of operation at both, low
and high speed. The idea is realized using a non-linear flux observer by
introducing a non-linear stator frequency dependent gain and stator resistance
adaptation algorithm. The analysis of the proposed method is included. A
presented stator resistance adaptation algorithm makes the observer robust to
the parameter uncertainties. The performance is investigated and verified with
experiments.
Rotor Speed And Position Observer For PMSM Sensorless Control System
Konrad Urbański, Krzysztof Zawirski
POZNAŃ UNIVERSITY OF TECHNOLOGY
Institute of Industrial Electrical Engineering
Piotrowo 3a, 61-138
Poznań, Poland
phone +48-61-6652386, fax +48-61-6652389
e-mail: zawirski@sol.put.poznan.pl
A problem of rotor speed and position detection for sensorless PMSM drive was
analysed in the paper. The concept based on detecting back EMF, induced in the
stator windings, was developed and modified. A general structure of observer,
with more complex function of corrector than traditional one was introduced. On
the base of this concept the observer with proportional-integral and sliding
mode correction was proposed. Simulation as well as experimental results showed
good properties of proposed observer structure.
A Speed Adaptive Kalman Filter Observer For Induction Motors
José L. Mora, A. Torralba, L. G. Franquelo
Dpto. de Ingeniería Electrónica de la Universidad de Sevilla
Escuela Superior de Ingenieros
Sevilla, Spain
email: mora@gte.esi.us.es
The extended Kalman filter has been applied extensively for speed and flux
estimation in induction machines. The main drawback of this estimator is its
complexity, and related to his, the high sample time needed for its
implementation in a DSP, so the expected performance is greatly reduced.
This paper presents a linear Kalman filter for rotor flux observation with
adaptive speed estimation that reduces the number of operations by a factor of
8.5 compared with the straightforward implementation of the extended Kalman
filter.
This estimator and an indirect vector control algorithm has been implemented in
a single DSP, allowing a sample time of only 50ms. The experimental results
shows a great dynamic performance, low speed error and a good response in low
speed operation.
Influence of Rotor Design on Sensorless Control for Induction Motors
Thomas M. Wolbank, Reinhard Wöhrnschimmel
Vienna University of Technology
Department of Electrical Machines and Drives
Gusshausstrasse 25/372, A-1040
Vienna, AUSTRIA
thomas.wolbank@tuwien.ac.at
Sensorless, field oriented control of standard induction motors at and near
zero frequency can only be achieved by exploiting inherent saliencies. The two
most prominent saliencies, which are usually exploited are caused by saturation
and slotting, thus enable the detection of the main flux and the rotor position.
The influence of these saliencies is not evident in normal operation of the
drive. However, it can be detected with a high frequency or transient excitation
caused by the inverter. Therefore, the high-frequency response is evaluated to
obtain the control signal.
As the interaction of all saliencies may lead to a deterioration of the
performance of the sensorless control algorithm in specific points of operation
it is advantageous to exploit only one saliency trying to compensate the
influence of the others. To facilitate this separation, different machine design
parameters can be adjusted reference to the saliency which has to be suppressed.
This paper is focused on the influence of different rotor design parameters on
the sensorless control signal. Measurements were performed reference to
sensorless control and to the spatial distribution of the transient flux change
measured with test coils placed at different areas of the machines.
To achieve this, differently designed machines have been manufactured, only
influencing the saliencies present in standard induction machines.
In addition results obtained from simulations covering transient hysteresis
effects are presented and compared to give a further insight into the transient
electrical behaviour of induction machines.
The sensorless control scheme applied in this paper is based on a transient
excitation of the machine. It detects local differences in the stator impedance
of the machine caused by spatial saliencies by evaluating the transient current
change due to voltage pulses applied to the terminals of the machine.
Sensorless speed control of slip-ring AC motor based on rotor voltage
frequency estimation
Fetah Kolonić *, Tomislav Idžotić ***
FACULTY OF ELECTRICAL ENGINEERING AND COMPUTING
Unska 3, Zagreb, Croatia, Tel./Fax. +(385 1) 6129-804 / 6129-705
Alojz Slutej **
ABB Automation Systems,
72167 Västerås, Sweden, phone:+46 21 340 528, fax:+46 21 240 290,
fetah.kolonic@fer.hr *
alojz.slutej@se.abb.com **
tomislav.idzotic@fer.hr ***
Sensorless speed control system with slip-ring AC motor is a highly
developed, wellproven system for heavy duty tasks especially in the field of
industrial cranes and another heavy duty material handling systems. In
situations where there is no tachometer or incremental encoder as a speed
feedback devices, actual speed information is realized via rotor voltage
frequency estimation (RVFE). Using line frequency as a reference, the
fundamental component of the rotor frequency gives the slip of the motor, which
determines the speed in digital form.
Position Estimation for Sensorless Control of Hybrid Stepper Motors
Including Zero Speed
Dipl.-Ing. Peter Aicher
Technische Universität München
Lehrstuhl für Feingerätebau und Mikrotechnik
Chair for precision engineering and micromechanics
Boltzmannstr. 15
85747 Garching, Germany
Tel./Fax.: ++49 (0)89 289-15187/-1512
aicher@fgb.mw.tum.de
http://www.fgb.mw.tum.de
A sensorless method for rotor position estimation of a hybrid stepper motor
has been developed. Injecting a high frequency carrier voltage to track spatial
inductance variations the method works at low speeds and at standstill. The
influence of speed and load conditions on the estimation error is investigated.
Improved rotor position estimation for maximum torque/current control of PMSM
drives
Stasi S., Salvatore L., Cupertino F.
POLITECNICO DI BARI
via E. Orabona 4
Bari, Italy
+39 080 5963258/+39 080 5963410
stasi@deemail.poliba.it,
salvatore@poliba.it,
cupertino@ieee.org
This paper presents a novel PMSM sensorless control scheme. The observed
rotor position is obtained from the active and reactive electromagnetic torque
calculated in both the stationary a-b and rotor d-q reference frame. This
observed rotor position is improved by the addition of a term, derived from the
d-axis current controller voltage output, and used for the coordinate
transformation. The further compensation of the global time-delay, introduced by
the voltage-, current-filters, and inverter, has to be added to the estimated
rotor position to calculate the current feedback signals and obtain maximum
torque/current control of the drive. The original scheme guarantees a good field
orientation even if parameter variations occur and/or initial rotor position is
not exactly known.
Novel Hardware Current Controller for Sensorless INFORM-based Permanent
Magnet Synchronous Drives
Robeischl Ewald, Schrödl Manfred IEEE, Kremsl Robert
Vienna University of Technology
Institute of Electrical Drives and Machines
Gusshausstrasse 25-29/E372
A-1040 Vienna
Austria
Tel.: +43/1/58801/37227; Fax.: +43/1/58801/37299
ewald.robeisch@tuwien.ac.at
e372@tuwien.ac.at
This paper presents a newly developed discrete-time hardware current
controller based on DC-link current measurement. It is combined with a
sensorless PMSM drive, which can be operated with highly dynamic properties in
the full speed range including low speed and standstill.
Position Sensorless PMSM DTC-Drive for Industrial Applications
Markku Niemelä, Julius Luukko, Juha Pyrhönen
LAPPEENRANTA UNIVERSITY OF TECHNOLOGY
P.O.Box 20
FIN-53851 Lappeenranta
Lappeenranta, Finland
Tel. +358 5 621 11, Fax. +358 5 621 6799
Markku.Niemela@lut.fi
Permanent magnet synchronous motors (PMSM) have become attractive to many
variable speed industrial applications in medium and large power drives. In this
paper a sensorless DTC-drive for a PMSM is presented. The principle of
determination of the initial rotor position at start-up, the operation at zero
speed and at low rotational speeds in general are described. Some of the results
of the numerous experiments performed with a laboratory prototype drive are
given.
DS3.5: Topic 6: Estimation techniques
(R. B. Inderka, RWTH - Aachen - ISEA, Germany)
Impact of Iron Loss on Direct Torque Control of Induction Machines and its
Compensation
E.Levi, T.Pham-Dinh,
LIVERPOOL JOHN MOORES UNIVERSITY
School of Engineering, Byrom St
Liverpool L3 3AF, UK
Tel: +(44-151) 231 2257, Fax: +(44-151) 298 2624
e-mail: e.levi@livjm.ac.uk
General theory of electrical machines neglects the existence of the iron
loss. As a consequence, all the high performance control schemes are
characterised with certain amount of detuning, caused by the iron loss. Impact
of iron loss on operation of field oriented induction machines has been recently
subjected to detailed scrutiny and appropriate methods of iron loss compensation
have been developed. As far as direct toque control (DTC) of induction machines
is concerned, it appears that a corresponding study has never been done. This
paper discusses two aspects related to the problem of iron loss in DTC of
induction machines: detuning effects and means for compensation. A detailed
simulation study is at first performed and the influence of iron loss on
accuracy of the DTC scheme is evaluated. It is shown that the net consequence of
the iron loss existence is a difference between the torque reference and the
average motor output torque, that may be substantial. On the other hand,
accuracy of stator flux magnitude and position estimation, being based on stator
voltage and current measurement, is not affected by the iron loss existence. On
the basis of the results of the detuning study, an iron loss compensation method
is developed. The method can be used in an extremely simple form for a variety
of induction machines, that consists of deduction of a constant, iron loss
related, torque component from the initial torque estimate
Comparative Evaluation of Flux Observers in a High Performance Drives
Testbed
Eric A. Carter, Alberto Bellini*, Dustin Murdock, and Robert D. Lorenz
University of Wisconsin - Madison
1513 University Avenue
Madison, WI 53706 USA
ecarter@students.wisc.edu
damurco@students.wisc.edu
lorenz@engr.wisc.edu
*University of Parma
Parco Area delle Scienze, 181/A, ITALY
+39 0521 905831/+39 0522 905822
bellini@ee.unipr.it
This paper presents a comparative evaluation of flux observers for
state-of-the-art, direct field oriented induction machine drives. The
implementation is part of the development of a high performance drive testbed.
Included in the full paper is the development of the overall testbed layout,
test and measurement systems embedded in the testbed, as well as the control
topology.
FUZZY LOGIC BASED GAINS determination of induction motor flux observers
F. Berthereau*,
B. Robyns*, J.P. Hautier¨
*
¨Laboratoire
d'Electrotechnique et d'Electronique de Puissance (L2EP)
* Ecole des Hautes
Etudes Industrielles - 13, rue de Toul, F-59046 Lille Cedex, France
E-mail: benoit.robyns@hei.fr
Tel.:++.33.3.28.38.48.58 - Fax.:++.33.3.28.38.48.04
¨
E.N.S.A.M. - 8, boulevard Louis
XIV, F-59046 Lille Cedex, France
It is proposed in this paper a method to compute gains of induction motor
flux observers, based on fuzzy logic associated to a theoretical sensitivity
analysis. The theoretical analysis, taking the magnetic saturation into account,
allows to study the observer sensitivity to all parameter uncertainties. The
fuzzy logic associated to the theoretical analysis allows to determine observer
gains which optimize together dynamics and sensitivity criteria. Although the
theoretical sensitivity analysis may be developed for observers in any reference
frame, the proposed method is applied in this paper respectively to a reduced
and a full order flux observers based on the Park model in the stator reference
frame only. The proposed method is validated by experiments on a 750W induction
motor.
A Self-Organizing Neuro-Fuzzy Speed Estimator for DC Motor Drives
D.Kukolj E. Levi
UNIVERSITY OF NOVI SAD
Faculty of Technical Sciences, Fruskogorska
21000 Novi Sad, Yugolsavia
Tel: 381 21 58 165, Fax: 381 21 350 610
e-mail: kukolj@uns.ns.ac.yu
LIVERPOOL JOHN MOORES UNIV.
School of Engineering, Byrom St
Liverpool L3 3AF, UK
Tel: 44 151 231 2257, Fax: 44 151 298 2624
e-mail: e.levi@livjm.ac.uk
The paper deals with an application of a self-organising Takagi-Sugeno fuzzy
rule-based model, combined with a feed-forward neural network, as a speed
estimator for separetely excited DC motor drives. The proposed speed estimator
is characterised with moderate computational requirements and with a simple
knowledge base. These features have enabled implementation of the speed
estimator in a low-cost 20-bit MASC 3500 digital signal processor. The
implemented speed estimator was tested for a variety of operating conditions and
a very satisfactory accuracy was achieved.
New Dead-time Compensation using Disturbance Observer
in a Vector Controlled PM Synchronous Motor
Drive
Hyun-Soo Kim, Hyung-Tae Moon, and Myung-Joong Youn
Department of Electrical Engineering & Computer Science
Korea Advanced Institute of Science and Technology
373-1 Kusong-Dong, Yusong-Gu, Taejon 305-701, Korea
Phone : 82-42-869-3422, Fax : 82-42-869-3410
E-mail : mmyoun@ee.kaist.ac.kr
A new on-line dead-time compensation method for a permanent magnet (PM)
synchronous motor drive is proposed. Using a simple disturbance observer without
any additional circuits and off-line experimental measurements, disturbance
voltages in the synchronous reference dq frame caused by the dead time and
non-ideal switching characteristics of power devices are estimated in an on-line
manner and fed to voltage references in order to compensate the dead-time
effects. The proposed method is applied to a PM synchronous motor drive system
and implemented by using software of a digital signal processor (DSP) TMS320C31.
Experiments are carried out for this system and the results well demonstrate the
effectiveness of the proposed method.
Identification of the mechanical parameters in high performances
drives
Armando Bellini — Stefano Bifaretti — Stefano Costantini
Department of Electronic Engineering, University of Rome “Tor Vergata”
Via di Tor Vergata 110, 00133 ROMA (Italy)
Tel. +390672597364, Fax +39062020519,
e-mail bellini@ing.uniroma2.it
http://www.eln.uniroma2.it/webelind/
In high performance drives it is important to have a rapid and precise
control of the motor rotation speed. To this aim a clean measure of the speed is
necessary to have; it is useful to identify the load parameters so to increase
the sturdiness of the system and, eventually, proceed to a self-tuning of the
speed regulator. This paper proposes to employ a parameter estimator composed by
a Steady State Kalman Filter (SSKF) that furnishes dynamic variables (speed and
acceleration), and by a Recursive Least Square algorithm (RLS) that provides the
load parameter.
A reduced order kalman observer for induction motor flux estimation
Armando Bellini — Stefano Bifaretti – Stefano Costantini
Department of Electronic Engineering, University of Rome "Tor Vergata"
Via di Tor Vergata 110, 00133 ROMA (Italy)
Tel. +390672597364, Fax +39062020519,
e-mail bellini@ing.uniroma2.it
http://www.eln.uniroma2.it/webelind/
Many field oriented induction motor drives use a state observer to determine
the components of the rotor flux representative vector. To this aim, different
kinds of observers, based on deterministic or stochastic models, are used. The
employment of a stochastic observer needs much more math operations; therefore
its implementation on a microcomputer-based control circuit requires suitable
simplifications. The paper presents a new reduced order stochastic observer,
whose implementation requires a number of math operations that can be easily on
line performed by recent microprocessors.
Adaptation of Vector Control of Induction Motor for Rotor Time Constant
Variation
Petr Palacky, Pavel Brandstetter
VSB-Technical University of Ostrava
17.listopadu 15, Depart. 448
Ostrava-Poruba, Czech Republic
tel.: +420-69-6994287, fax: +420-69-6994050
email: petr.palacky@vsb.cz
The range of controlled electrical drives is greatly expanded by the
transition to A.C. motors. Control in a moving reference frame, such as field
orientation, presents a unifying principle for the design of high dynamic
performance drives. The main problem of the vector control in the field
co-ordinates of motor is the separation of torque and flux control circuits
without mutually influencing. For this purpose the knowledge of the value and
position of the rotor flux vector is necessary. Parameters of the machine are
not constant. Especially the stator and rotor resistances are varied in
dependence on the changing temperature of the motor. In this paper is presented
the rotor time constant adaptation method.
Luenberger Observer for High Speed Induction Machine Drives based on a New
Pole Placement Method
G.Griva, P.Ferraris, F.Profumo, R.Bojoi
Politecnico di Torino, Dip. Ing. Elettrica Ind.le,
c.so Duca degli Abruzzi No. 24
10129, Torino, Italy
Tel: +39-011-564.7159, Fax: +39-011-564.7199
email: grivag@athena.polito.it
R.Maceratini, G.Barba
FIAT R&D Center
Orbassano, Italy
The Luenberger Observer is one of the most attractive solutions to estimate
the magnetic flux in Induction Machine Drives. In fact, it is possible to obtain
a speed estimation for “sensorless” vector control with a simple modification of
the algorithm.
Nevertheless, when high operation speeds are needed, the discrete-time
implementation requires a considerable computational effort because of the
speed-dependent continuous-time model.
This paper presents a new method to calculate the feedback gain matrix which
generalizes a well known result and can guarantee stability of the observer over
a wide speed range. The accuracy can be further improved by a simplified
second-order approximation in the discrete-time rotor equations. The overall
computational cost is very low and it is comparable to a first-order
approximation.
Measurement and Estimation of the Multivariable Frequency Response
Functions of Synchronous Machines
N. Dedene*, R. Pintelon* and Ph. Lataire**
*Department ELEC, **Department ETEC
VRIJE UNIVERSITEIT BRUSSEL
Pleinlaan 02, 1050 Brussels, Belgium
Phone: (+32-2)6292946, Fax: (+32-2)6292850
E-mail: Nele.Dedene@vub.ac.be
This paper presents a multiple-input multiple-output method for the
measurement and identification of the d-axis impedance functions of synchronous
machines. The proposed procedures are tested at different saturation levels on a
130kVA salient pole synchronous machine. The standstill frequency response
estimated main inductances are compared to the no-load open-circuit
characteristic.
Sensorless control system of double fed induction machine with predictive
current controller
*#Krzeminski Z., "Popenda
A., #Melcer M., *Ladach P.
*TECHNICAL UNIVERSITY OF GDANSK
Ul. Sobieskiego 7, 80-952 Gdansk, POLAND
Tel.: +48 58 3472348 Fax: +48 58 3410880 E-mail:
zkrzem@ely.pg.gda.pl
"TECHNICAL UNIVERSITY OF CZESTOCHOWA
Al. Armii Krajowej 17, 42-200 Czestochowa, POLAND
Tel.: +48 34 3250840 Fax : +48 34 3250822 E-mail:
popenda@el.pcz.czest.pl
#ELECTROTECHNICAL INSTITUTE
Ul. Narwicka 1, 80-557 Gdansk, POLAND
Tel.: +48 58 3431291 Fax: E-mail:
zbigniew.krzeminski@iel.gda.pl
A control system for the double fed induction
machine is presented in the paper. The measurement of the rotor position angle
is avoided in the proposed system because of application of phase locked loop
for synchronization of rotor current with stator voltage. Two cases of the
rotor current control are considered: the first one is the independent control
of the rotor current components by hysteresis controllers in a three-phase
system, and the second one is the control using predictive current controller.
The control systems for the double fed machine have been investigated by
simulations and experimentally and their properties are compared.
Sensorless Speed Detection of Induction Machines Using Wavelet
Decomposition
Aleksandar Obradovic, Momir Djurovic, Gojko Joksimovic
Elektrotehnicki fakultet, University of Montenegro,
Cetinjski put bb
81000 Podgorica, Yugoslavia
Phone/Fax: +381-81-245839 / +381-81-245873
E-mail: momirdj@cg.ac.yu
By using the Wavelet decomposition in time domain and the measurements of the
stator current one can determine the speed of induction machines without having
any sensor. The use of the Wavelet decomposition eliminates some disadvantages,
which are brought in calculations using STFT. It has produced results in shorter
time for the same accuracy.
Estimation of Induction Motor Variables based on ANN Utilising Apriori
Information
Jaroslava Žilková, Jaroslav Timko, Viliam Fedák
Technical University of Košice
Letná 9, 042 00 Košice
Košice, Slovak Republic
tel.:+421-55-602 2278 / fax: +421-55-602 2277
e-mail: zilka@tuke.sk
timkoj@tuke.sk
fedakv@tuke.sk
Artificial Neural Networks (ANN) is utilised in estimator for system
variables identification. Using ANN approach the induction motor rotor flux
observer has been developed. The method of estimation of rotor flux is based on
feedforward on-line learning ANN. Obtained results show good performance both in
steady and transient states of the developed observer. The estimator is robust
against variances of the rotor resistance.
A Radial Force Estimation with Search Coil Fluxes in a Bearingless
Induction Motor driven by Multi Inverters
Koji Kiryu*, Akira Chiba* and Tadashi Fukao**
*Department of Electrical Engineering,
Faculty of Science and Technology, Science University of Tokyo,
2641 Yamazaki, Noda, Chiba, Japan 278-8510.
Tel.+81(471)24-1501 Ext.3700
Email:chiba@ee.noda.sut.ac.jp
**Department of Mechanical Systems Engineering,
Musashi Institute of Technology
1-28-1 Tamazutsumi Setagaya-ku, Tokyo, Japan
Tel.+81(3)3703-3111 Ext.3933
Email:tfukao@me.musashi-tech.ac.jp
In this paper, a principle of radial force estimation based on the induced
voltage in search coils is shown. The proposed method is applied to a test
machine. It is confirmed that the estimated radial force is corresponding to the
generated radial force in both static and dynamic tests.
A Self-Organizing Neuro-Fuzzy Speed Estimator for DC Motor Drives
D.Kukolj E. Levi
UNIVERSITY OF NOVI SAD
Faculty of Technical Sciences, Fruskogorska
21000 Novi Sad, Yugolsavia
Tel: 381 21 58 165, Fax: 381 21 350 610
e-mail: kukolj@uns.ns.ac.yu
LIVERPOOL JOHN MOORES UNIV.
School of Engineering, Byrom St
Liverpool L3 3AF, UK
Tel: 44 151 231 2257, Fax: 44 151 298 2624
e-mail: e.levi@livjm.ac.uk
The paper deals with an application of a self-organising Takagi-Sugeno fuzzy
rule-based model, combined with a feed-forward neural network, as a speed
estimator for separetely excited DC motor drives. The proposed speed estimator
is characterised with moderate computational requirements and with a simple
knowledge base. These features have enabled implementation of the speed
estimator in a low-cost 20-bit MASC 3500 digital signal processor. The
implemented speed estimator was tested for a variety of operating conditions and
a very satisfactory accuracy was achieved.
DS3.6: Topic 6:
Design and diagnostic
(M.
Fasching, Siemens, Austria)
Effect of Load on Acoustic Noise Radiated from PWM Controlled Induction
Machines
Z.Q. Zhu, L. Xu, D. Howe
University of Sheffield
Department of Electronic & Electrical Engineering,
Mappin Street, Sheffield S1 3JD, UK
Tel: +44-114-2225195, Fax: +44-114-2225196
E-Mail: Z.Q.ZHU@SHEFFIELD.AC.UK
The paper systematically reports theoretical and experimental investigations
of the effect of load conditions on the acoustic noise radiated by PWM
controlled induction machines. The current and noise spectra, as well as the
sound pressure level, are measured and analysed as both switching frequency and
load are varied. The origins of the noise sources on load were identified,
particularly those due to the interaction of permeance field harmonics and mmf
field harmonics associated with current harmonics, and the measured noise
frequencies are compared with theoretical predictions.
Rotor Cage Fault Diagnosis in Operating Three-Phase Induction Motors,
Under the Presence of Time-Varying Loads
S. M. A. Cruz A., J. Marques Cardoso
UNIVERSIDADE DE COIMBRA
Departamento de Engenharia Electrotécnica, Pَlo II – Pinhal Marrocos
Coimbra, Portugal
Telef: + 351 239 796200 / Fax: + 351 239 796247
smacruz@ieee.org,
ajmcardoso@ieee.org
This paper deals with the use of the synchronous reference frame current Park’s
Vector Approach in the diagnosis of rotor cage faults in three-phase induction
motors, under the presence of time-varying loads. An analytical study, based on
the d-q model of the induction motor is presented, showing how the occurrence of
abrupt changes in the motor load torque affect quantities like the d-q axis
components and the spectrum of the motor supply current, among others,
emphasizing its implications in the diagnosis of rotor faults in operating
three-phase induction motors. Several simulated and experimental results have
shown that the current spectral components produced by the occurrence of rotor
faults can easily be indistinguishable from the ones introduced by time-varying
loads. On the other hand, the synchronous reference frame current Park’s Vector
representation allow us to dissociate the effects produced by the presence of
rotor faults from the ones originated by the mechanical load of the motor, thus
allowing the diagnosis of rotor faults in a motor coupled to any kind of
mechanical load.
Influence ofLoad Torque on RotorAsymmetry Effects in Squirrel Cage
Induction Machines Including Detection by Means of the Vienna Monitoring Method
C.Kral,F.Pirker,G.Pascoli
Arsenal Research
Faradaygasse 3, 1030 Vienna, Austria
fax: +43—50550—6595
email: kral.c@arsenal.ac.at
http://www.arsenal.ac.at
The aim of this contribution is the investigation of the influence of load
torque on rotor fault specific effects. An asymmetric rotor cage causes sideband
currents and shaft torque modulations which depend on the actual load state. In
general, these are well known phenomenas. While their frequencies moves with the
actual slip, amplitudes and phase angles show non linear dependencies. These
dependencies will be investigated and analyzed. Simulation and measurement
results are presented.
This paper deals with the Vienna Monitoring Method (VMM), too. The VMM is based
on the comparison of calculated torque values which are obtained from two
different mathematical machine models. The impact of load torque on the VMM will
be investigated.
Single Stator Double Rotor Machine with independent controllable shafts
based on the DUOMOTOR® principle
Manfred Schrödl, Stephan Ojak, Wolfgang Zukrigl
Vienna University of Technology,
Institute of Electrical Drives and Machines
Gusshausstrasse 25-29,
A-1040 Vienna, Austria
Phone: + 43-1-58801-37201,
Fax: +43-1-58801-37299
manfred.schroedl@tuwien.ac.at,
stephan.ojak@tuwien.ac.at,
wolfgang_zukrigl@hotmail.com
http://www.ieam.tuwien.ac.at
This paper introduces a machine based on the DUOMOTOR® principle, consisting
of one stator and two rotors. These rotors are beared uniliteral and can be
controlled independently of each other. The paper starts with a mathematical
model of this new kind of machine and presents its control structure, which is
based on a digital signal processor system. The processor system reads all the
necessary machine parameters and controls the inverter, which switches the
electrical power for the DUOMOTOR® machine.
Failure
analysis of an electrical drive system with a transverse flux machine (TFM)
1 DELFT UNIVERSITY of
TECHNOLOGY & 2 ALSTOM Traxis
Mekelweg 4
2628 CD Delft, Netherlands
DS3.7: Topic 6: Modelling
and simulation
(K. M. Abbott, Alstom T&D, UK)
Dynamic Modeling of Brushless DC Motor Drives
B. K. Lee
Student Member, IEEE
Texas A&M University
Dept. of Electrical Engineering
B. Fahimi*
Member, IEEE
M. Ehsani
Fellow, IEEE
College Station, TX 77843-3128, U.S.A
Phone: +1-979-845-7582/Fax: +1-979-862-1976
E-mail: ehsani@ee.tamu.edu
http://ee.tamu.edu/~ehsani
*Electro Standards Laboratories
36 Western Industrial Drive, Cranston, RI 02921
Phone: +1-401-943-1164/Fax: +1-401-946-5790
A dynamic simulation model for the brushless dc (BLDC) motor drives using
Matlab is presented. In this model, an entire BLDC motor drive, including power
conversion unit, BLDC motor, and speed/torque control system, is investigated.
Especially, the PWM inverter is modeled using switching function concept, so
that the detailed voltage and current waveforms, such as line-to-line voltages,
inverter input current, ac line current, and switch/diode currents, can be
obtained and average/rms ratings of the components can be easily calculated.
Also, the proposed model is made into modular blocks and it can be easily
extended to other ac motor applications with a little modification. The detailed
modeling method is explained and its actual implementation is described. The
validity of the proposed model is verified by various simulation results.
Harmonic Interaction of Active-Front-End Three-Level Inverters operating in a weak network
with long cables
J. Pontt, M. Braun (*), A. Orellana
UNIVERSIDAD TECNICA FEDERICO SANTA MARIA
Electronics Department.
Casilla 110-V, Valparaيso, Chile.
Tel: (+56)-32-654554, Fax: (+56)-32-797468
jpo@elo.utfsm.cl
(*) UNIVERSITؤT KARLSRUHE (TH)
Elektrotechnisches Institut
D-76128 Karlsruhe, Germany.
The analysis of the harmonic Interaction of Active-Front-End PWM Three-Level
inverters concerning the operation in regenerative mode
within a weak network with long cables is presented. For an actual mineral processing application in
the Megawatt range, the need of harmonic filters is demonstrated for meeting the standard
IEEE-519-92.
A Novel Beatless Control for Power Converter Systems Used in AC Electric
Cars.
Satoru Inarida Tokunosuke Tanamachi Kiyoshi Nakata
Hitachi, Ltd.
1070 Ichige, Hitachinaka-shi Ibaraki-ken, Japan
Tel +81-29-276-6663 Fax +81-29-276-3149
e-mail
st-inarida@em.mito.hitachi.co.jp
In power converter systems for AC electric cars, the DC link voltage contains
a ripple component because of the single-phase voltage source. Therefore, a beat
phenomenon of the motor current occurs, which causes torque ripple and a howling
noise of the motor. A solution to this problem is use of an additional series
resonant filter at the DC link. However, addition of another component is an
obstacle to making the power converter system smaller and lighter. This paper
proposes a novel beatless control, based on the frequency modulation and vector
control, which can effectively suppress the beat phenomenon without using an
additional resonant filter at DC link. Effectiveness of the control is
demonstrated with simulation and experimental results.
Direct
Modulation of Electrical Conversions for a Multilevel Chopper
François B.1, Saudemont C.2, Fadel M.3
1Laboratoire d'Electrotechnique et d'Electronique de
Puissance de Lille (L2EP)
E.C. Lille, Cité Scientifique BP 48, 59651 Villeneuve d’Ascq, France
tel: 3 20 33 54 59, fax: 3 20 33 54 54,
e_mail: bruno.francois@ec-lille.fr
2 E.S.I.E.E., Amiens, 14, quai de la Somme, BP 100, 80083 AMIENS Cedex 2,
France
3Laboratoire d'Electrotechnique et d'Electronique Industrielle (LEEI),
Unité Mixte de Recherche I.N.P.T.-E.N.S.E.E.I.H.T. / C.N.R.S.
B.P. 7122, 2 Rue Camichel, 31071 Toulouse Cedex 7, France
In this paper the methodology of the Causal Ordered Graph (COG) is used for
the modelling of a flying capacitor cell chopper. The issues of this study is a
best understanding of the operating of this particular converter in order to
obtain a more precise design of the control system. The obtained modelling shows
that high-voltage multi levels are obtained by combination of two different
three-level functions (conversion functions). Therefore a novel PWM strategy is
deduced. It consists of separating the modulation period for creating two
fictive modulated voltages via the direct width modulation and the position
setting of both conversion functions. Therefore, the durations of electrical
conversions can be precisely calculated and directly processed by modulators.
The redundancy of the different switches configurations for the voltage half
value allows to use a particular modulation technique which limits the
deviations of the half-value voltage. Switching patterns are deduced and a
decoupling control of the capacitor voltage and the supply current is designed.
Simulation of Power Electronics Systems using “Simunet”: The new Power
electronics toolbox for “Simulink/Matlab”
Samir Salama
University of Applied Sciences
Josef-Gockeln-Str. 9
D-40474 Duesseldorf, Germany
+49(0)211 4351 314
samir.salama@fh-duesseldorf.de
This paper describes a new power electronics toolbox Simunet designed to be
used with Matlab/Simulink® from the MathWorks Inc.
Examples of application of Simunet in the Simulink environment are given and the
performance of Simunet is compared with that of Power System Blockset from the
MathWork.
Simunet convinces enormously in the following fields:
· Faster simulation speed: more than an order of magnitude
· Lower size of data file: less than 10%
· Higher accuracy of the simulation results
Adaptive derivation of inter-harmonics in variable speed drives
J. Arrillaga, G. N. Bathurst and N. R. Watson
UNIVERSITY OF CANTERBURY
Department of Electrical and Electronic Engineering
Christchurch, New Zealand
Telephone: +64-3-3642-867 Fax: +64-3-3642-761
n.watson@elec.canterbury.ac.nz
http://www.elec.canterbury.ac.nz
The calculation of interharmonics produced by a Variable Speed Drive is
performed over a range of operating points using an Iterative Harmonic Analysis
technique. The variation of the sideband frequencies and magnitudes with motor
operating point are obtained. Also discussed is the effect of different dc link
inductor sizes on the interharmonic magnitudes. The method used is shown to be
fast and robust while producing reliable information.
A Versatile Model of Squirrel Cage Induction Machines for Design,
Monitoring and Diagnosis Purposes
V. Devanneaux H. Kabbaj B. Dagues J. Faucher
Laboratoire d’Electrotechnique et d’Electronique Industrielle
Unité Mixte de Recherche INPT – ENSEEIHT/CNRS
BP7122 – 2, rue Charles Camichel
31071 TOULOUSE Cedex 7 – FRANCE
Tel. : 33-5-61-58-83-61 – Fax : 33-5-61-63-88-75
Vincent.Devanneaux@leei.enseeiht.fr
http://www.leei.enseeiht.fr
A versatile and accurate transient model of squirrel cage induction machines
is presented. A coupled magnetic circuits approach is used and very few
restrictive assumptions are made. All parameters are calculated from the actual
geometry and winding layout of the machines rather than from transformed or
equivalent variables, making this model suitable for design, monitoring and
diagnosis purposes.
The detailed depiction of the procedure needed to implement such a versatile
model with simulation results is the subject of this paper.
Modeling the Cable Oscillations in the Inverter Fed AC-machines
Antti Tarkiainen, Juha Pyrhönen
Lappeenranta University of Technology
P.O.Box 20
FIN-53851 Lappeenranta, Finland
Tel. +385 5 621 11, Fax. +358 5 621 6799
Antti.Tarkiainen@lut.fi
http://www.ee.lut.fi
The objective of the paper is to present a model of an induction motor that
takes a feeder cable in to account. The feeder cable is modeled using two
different transmission line models. The voltage reflections in a long feeder
cable of a PWM inverter fed motor produce cable oscillation that can interfere
with the control system of the motor. The presented model of an induction motor
and a feeder cable is fast enough to simulate that it can be used to study the
effect of the cable oscillation on the motor control system.
Simulation of temperature distribution in the induction machine
P. Gnacinski
Gdynia Maritime Academy
Department of Marine Electrical Power Engineering
Morska Str. 83
81-225 Gdynia, Poland
tel. +48.58.6289440/fax +48.58.6217353
Piotrg@wsm.gdynia.pl.
Temperature distribution in electrical machines is usually simulated by the
methods of finite elements and thermal schemes. The method of finite elements
enables to obtain very detailed temperature distribution in the machine,
although for many applications, it is enough to calculate only one or a few most
important temperatures in the machine. If one needs to know only simplified
temperature distribution or high speed of calculation is required (for example
on-line simulation), the method of thermal schemes is suitable.
Thermal schemes differ from each other depending on details of construction of
machines as well as on assumed simplification. This paper deals with to
comparison of the accuracy of two thermal models: simplified one and
comparatively more extended. Results of measurement and computer simulation are
presented for 3 kW 1415 rpm total-enclosed induction cage machine.
Off-line Parameter Identification Methods of a Sensorless controlled
Induction Machine used in a high efficiency low-cost traction drive
Peter PICHLER, Peter Ebner, Helmut WEISS
Department of Electrical Engineering, University of Leoben
Franz-Josef-Straße 18
A-8700 Leoben, Austria
Tel.: 0043-3842-402312
Fax : 0043-3842-402318
Peter.Pichler@notes.unileoben.ac.at
Sensorless control of a PWM inverter fed induction machine yielding a robust,
optimally designed traction drive incorporating high starting torque as well as
a wide speed range is realised by an extended non-linear machine model. Machine
parameter determination variants are compared with measured data. A motor
dimensioning procedure is developed.
DS3.8: Topic 11:
System engineering I
(S. Colombi, IMV Invertomatic Tech. SA,
Switzerland)
New Methods to Suppress EMI Noises in the Motor Drive
System
Nobuyoshi Mutoh*, Mitsukatsu Ogata, Kayhan Gulez, and Fumio Harashima
Tokyo Metropolitan Institute of Technology
6-6, Asahigaoka, Hinoshi-shi, Tokyo, 191-0065, Japan
*Tel: +81-42-585-8645, Fax: +81-42-583-5119
*E-mail: nmutoh@cc.tmit.ac.jp
New methods are studied that can suppress EMI noises, especially common mode
currents produced in the motor drive system. One is a packaging technique that
forms power converters using a four-layer printed power circuit board. The other
is a method based on the generation mechanism of common mode currents which was
developed from experimental analyses. It is proved by experiments that the
former can effectively control common mode currents, including radiated
emissions, and the latter can suppress them without any compensators between the
inverter and the motor
Analysis of Mis-operation Caused by EMI in Power Electronic Equipment
Dehong Liu, Jianguo Jiang, Zhengming Zhao
Department of Electrical Engineering, Tsinghua University, 100084
Beijing, CHINA
Tel: +86-10-62773010 / Fax: +86-10-62783057
Email:
dh-liu@mail.eea.tsinghua.edu.cn
jjg@mail.tsinghua.edu.cn
Mis-operation caused by EMI in power electronic equipment is a troublesome
problem that often occurs during design and operation process. This paper is
mainly focused on EMI sources, propagation characteristics, and suppression
schemes in power electronic equipment. As an example, disturbances in the
control circuit of a 6kW charger with a mis-operation fault are measured. The
EMI caused by switching device IGBT in the main circuit and driving pulses in
the control circuit are compared. Then by a system function approach, the high
pass characteristic of EMI coupling path from the main circuit to the control
circuit board is analyzed. Using the system function, EMI in the control circuit
caused by the IGBT is predicted. To diagnose the mis-operation in the control
circuit, susceptibilities of several digital logic integrated circuits(ICs) to
pulse like EMI, and suppression schemes are studied through experiments. As a
result, mis-operation in the control circuit of the charger is eliminated.
Determining of high fequency (HF) common mode (CM) model impedance
parameters with ANN (artifical neural networks) from EMI emissions
Kayhan Gulez 1 , Nobuyoshi Mutoh 1 , Fumio Harashima 1 , Kouhei Ohnishi 2
Mehmet Uzunoglu 3
1 Tokyo Metropolitan Institute of Technology, Department of Electronic Systems
Engineering
6-6 Asahigaoka Hino-Shi, 191-0065, Tokyo, JAPAN, Tel/Fax: +81 42 585 8645
2 Keio University, Faculty of Science and Technology, Depart. of System Design
Engineering,
3-14-1 Hiyoshi, Kohoku-ku, 223-8522 Yokohama, JAPAN
3 Yildiz Technical University, Electrical-Electronics Faculty, Electrical
Engineering
Department, 80750 Besiktas, Istanbul, TURKEY, Fax: +90 212 2594967
E-mails: kgulez@cc.tmit.ac.jp,
nmutoh@cc.tmit.ac.jp,
f.harashima@tmit.ac.jp,
ohnishi@sd.keio.ac.jp,
uzunoglu@yildiz.edu.tr
Predicting and solving EMI emissions related to Common Mode (CM) ones in
inverter (also, in pulse with modulation (PWM) inverter)-induction motor drive
systems requires various frequency-dependent effects to be considered. Thus, the
application of filter circuitry to increase the performance per size and prevent
dependency on some parameters of the motor for Electro-Magnetic Interference
(EMI) filter is considered. The major problems are power line frequency
rejection and the compensation of the feedback loop, which is influenced by the
wide-ranging utility impedance.
Thus, the proposed method allows another way to determine High Frequency (HF)
Common Mode (CM) impedance components as a beginning way and sample on the
application stage of EMI filter to prevent the EMI noise applying to the
conducted electromagnetic emissions generally caused by power supply firstly,
then secondly to Common Mode (CM) path of the motor drive system.
Optimisation of the volume of a PFC Flyback structure under EMC and loss
constraints
Chérif LAROUCI, Jean-Paul FERRIEUX, Laurent GERBAUD, James ROUDET
Laboratoire d’Electrotechnique de Grenoble, CNRS UMR 5529 INPG/UJF
ENSIEG BP 46, 38402 St Martin d’Hères cedex, France
Tel: 33 (0)4 76 82 64 39, Fax: 33 (0)4 76 82 63 00
Larouci@leg.ensieg.inpg.fr
This paper presents a sizing and optimisation procedure of a Flyback
structure used in Power Factor Correction (PFC) mode. The optimisation aim is to
get the passive component optimal volume, to respect EMC standards and to
minimise the whole losses in the structure. To avoid time-domain simulation,
analytical models of the Flyback structure are developed and used to carry out
an optimisation process. The robustness of two software algorithms is tested and
different optimisation results are presented.
Investigation of Phenomena in the System Voltage Inverter – Cable –
Induction Motor
Zdeněk Peroutka, Václav Kůs
Department of Power Electronics and Control Engineering, University of West
Bohemia
Univerzitni 8
Plzen, Czech Republic
Tel.: +420 19 7236881, Fax: +420 19 7225320
Email: pero@kve.zcu.cz,
kus@kve.zcu.cz
http://www.fel.zcu.cz/kve
The paper deals with investigation of adverse effects in the system voltage
inverter – cable – induction motor. Very important part of analysis is a model
of the motor, especially determination of motor capacitances. Several
representations (one-phase and three-phase) of the motor and the cable suitable
for determination of motor transient overvoltage have been proposed. Factors
contributing to a motor overvoltage are described. Influence of cable length,
du/dt (rise time tON) of voltage pulses and motor characteristics is
investigated. The results are compared with data obtained from a lot of
experiments and simulations.
FDTD Based Analysis of Heat Sink Effects in SMPS Circuits
Gordana Felic
Department of electrical and Electronic Engineering
The University of Melbourne
Melbourne, Australia
613 834 46713
g.felic@ee.mu.oz.au
Rob Evans
Department of electrical and Electronic Engineering
The University of Melbourne
Melbourne, Australia
613 834 46713
r.evans@ee.mu.oz.au
EMC is an integral part of Switched Mode Power Supply design. An optimal SMPS
could be considered as one, which achieves the best possible compromise between
power losses and EMI disturbances, both of which are directly related to the
switching speed of the power devices. Thus the process of finding an acceptable
switching speed becomes a critical part of the design process. This paper
considers heat sink aspects of this power-loss/EMI trade-off.
Ground Interconnections Optimal Topology for DC Power Supplies
Daniela Dragomirescu1, Ovidiu Dragomirescu2
1LAAS-CNRS, 7,Av. du Colonel Roche, 31077 Toulouse cedex 4, France
e-mail: daniela@laas.fr URL: http://www.laas.fr/~daniela
2Polytechnic University of Bucharest, 313 Splaiul Independentei, 77206 Bucharest, Romania
e-mail:
dragomir@messnet.pub.ro
This paper provides an analysis of ground noise coupling problem for DC power
supplies. Due to interconnection topology, electromagnetic compatibility
problems occur between the different stages of power supplies, leading to high
output voltage ripple, system oscillations or modifications of the designed
system parameters. The ground interconnection optimal topology and the
methodology to obtain it are given.
Switching cell analyse as main EMC sources in Power Electronic.
Corinne Duloung, Michel Bensoam, Dominique Lafore
CEGEMA-ESIM, Centre of Micro-Electronic and Systems
13 451 Marseille cedex 20
France
Phone 33/(0)4.91.05.44.55 Fax 33/(0)4.91.05.45.65
E-mail: duloung@esim.imt-mrs.fr
Power electronic equipment’s EMC performances are very difficult to analyse.
This paper focusing on main sources of EMC disturbances: the switching cell. We
present an hybrid method able to characterise EMC’s switching sources, using
current and voltage waveforms and associated signal processing.
Common Mode EMI Prediction for Three-phase Inverter
David González, Josep Balcells, Javier Gago, Manel Lamich
ELECTRONICS ENGINEERING DEPARTMENT. UNIVERSITAT POLITÈCNICA DE CATALUNYA
Campus de Terrassa. C/ Colon, 1 08222 Terrassa, Spain
Phone: 34 93 739 82 81 / Fax: 34 93 739 80 16
dgonzalez@eel.upc.es ;
xgago@eel.upc.es ;
balcells@eel.upc.es ;
lamich@eel.upc.es
http://petrus.upc.es
In this paper a simplified mathematical model for the prediction of the
conducted EMI generated by a three-phase inverter is presented. The model allows
the prediction of disturbances that propagates to the DC bus and to the load,
but special attention has been paid to the Common Mode (CM) current disturbances
at the load side. The model, that is based on the frequency domain, identifies
the source of disturbance and its propagation paths as well. The model is used
to study an undesired effect that take place in the induction motor drives: the
circulation of CM currents through the motor. These currents are the origin of
many problems well described on the literature and many solutions have been
proposed to fix the problem. In this paper, two different vector modulation
techniques are used: the Classical Space Vector Modulation (CSVM) and the CM
Reduction Space Vector Modulation (CMRSVM). The experimental results obtained
from the experimental plant has been compared with those provided by the model
in order to validate the model.
PCB diagnosis with high resolution HF magnetic probe
Javier Gago, David González, Josep Balcells
ELECTRONICS ENGINEERING DEPARTMENT. UNIVERSITAT POLITÈCNICA DE CATALUNYA
Campus de Terrassa: C/ Colon, 1
08222 Terrassa, Barcelona, Spain
Phone: 34 93 739 82 81 / Fax: 34 93 739 80 16
xgago@eel.upc.es ;
dgonzalez@eel.upc.es ;
balcells@eel.upc.es
http://petrus.upc.es
A near filed magnetic or electric sensor with high spatial resolution is
needed to carry out EMI measurements on PCB in order to properly identify the
components that behaves as disturbance sources. The magnetic probes commercially
available are not suitable for this purpose: they have good accuracy and enough
bandwidth but poor spatial resolution. To overcome this problem, a new magnetic
field probe has been designed. This new sensor is described in this paper and
provides a flat response up to 220MHz. A comparison of the experimental results
of EMI measurements on a microprocessor board done with the new probe and with a
commercial one are presented. These results shown that the new magnetic probe is
suitable for identifying noisy components and the efficacy of corrective
techniques like decoupling capacitors.
Side effects of LISN on EMI measurements in power converters
Balcells J. , González D., Gago J, Lamich M.
Universitat Politècnica de Catalunya, Dept. Electronics Engineering
Colom, 1 , 08222, TERRASSA, Barcelona, Spain
Tel: +34 937398193 , Fax: +34 937398016
E-mail: balcells@eel.upc.es
http://petrus.upc.es
Several measurements were performed on a power converter to obtain a model
which allowed the prediction of conducted EMI . The goal was to identify the
relevant components and lay-out parameters influencing the EMI generation and
transmission. Some of the measured disturbances could not be attributed to any
real or parasitic component in the converter and finally, it was found that they
came from the measuring set-up (namely from the standard LISN and the measuring
through the high pass surge suppression filter, HPF). The introduction of real
models for the measuring equipment in the simulation, allowed a precise
coincidence between simulated and measured EMI and showed that the standard
measuring equipment introduce some extra disturbances which are no present in
the normal working conditions.
Evaluation and Prediction of Conducted Electromagnetic Interference
Generated by High Power Density Inverters
E. Hoene, W. John, M. Michel, H. Reichl
Fraunhofer Institut for Reliability and Microintegration
Gustav-Meyer-Allee 25
13355 Berlin, Germany
hoene@izm.fhg.de
For the purpose of investigation of electromagnetic interference mechanisms
in power electronics, calculation and measurement methods to characterize
sources and spreading paths of interference were presented. The methods were
used to model a commercial converter for induction motors. In this investigation
magnetic coupling between components and the properties of the electromagnetic
environment are shown to be important for the propagation of interference in
high power density devices. The results of EMI simulation were compared to
measurements to prove the validity of the proposed methods and the models of the
setup. The derived description of interference mechanisms allows a prediction of
interference levels and efficiency of filter measures in a specific topology.
Integrated Design Approach for Medium Power Inverters
Optimized for EMC and Thermal Performance
M.Chiado Caponet, F.Profumo
Politecnico di Torino
Dipartimento di Ingegneria Elettrica Industriale
C.so Duca degli Abruzzi 24
10129 - Torino, Italy
Tel.: +39-011-564-7111
Fax: +39-011-564-7199
e-mail: profumo@polito.it
Today’s state of the art power electronics system require the design
engineers to employ an integrated approach, utilizing IGBTs, heatsink,
capacitors and gate driver circuits at their peak performance. While
functionality is of course always important, the problem of manufacturability,
cost and electromagnetic compatibility (EMC) are elements that have to be kept
into account.
In this paper the authors show how electromagnetic interference caused by power
electronic circuits can be reduced by the minimization of the total inductance
commutation loop of an inverter leg. At the same time special attention is due
to the compactness of the inverter especially as regard to the heatsink and the
thermal issues.
The goal is a proper design and construction of the inverter so tackling EMI
directly at the source where most EMI is generated. In this way application of
expensive EMI filters can be avoided. Moreover the analysis of the thermal
behavior is showed.
In order to reach this goal a proper selection and design of the inverter parts
have been made and implemented.
Specifically, a prototype of converter has been developed to reach the maximum
reduction of the stray inductance commutation loop and the maximum compactness
using the actual available technology.
Experimental results are given to show the validity of this approach.
Role of Busbar as Interconnection: Study of Current Sharing
M.Besacier, J.L.Schanen, J.Roudet
LABORATOIRE d’ELECTROTECHNIQUE de GRENOBLE, CNRS UMR 5529 INPG/UJF
BP 46, F – 38402 SMH Cedex
Grenoble, France
Phone: (33) 476826299 Fax: (33) 476826300
Maxime.Besacier@leg.ensieg.inpg.fr,
Jean-Luc.Schanen@leg.ensieg.inpg.fr
http://www-leg.ensieg.inpg.fr/
Busbar structure is commonly used in power electronics applications, due to
its low inductance. However, although its low impedance, the busbar geometry can
sometimes lead to unbalanced current in paralleled components (power switches,
capacitors...). This paper starts with the best way to provide an electrical
equivalent scheme of this component. It will be shown that some coupled
resistive effects influence current sharing, and must be taken into account in
the modeling: an original method is given to account for this phenomenon in
common circuit simulators. Some solutions to balance current with modification
of busbar geometry is presented This method is applied to an industrial busbar.
Experimental validation are brought, in frequency and time domain.
New indices to evaluate the quality of the power absorbed by a non-linear
load
A. Dell'Aquila, M. Marinelli, V. Monopoli, P. Zanchetta
Dipartimento di Elettrotecnica ed Elettronica - Politecnico di Bari
via E. Orabona 4, 70125 - Bari, Italy
Tel +39-080-596.3366 /3433 /3769 Fax +39-080-596.3410
dellaqui@poliba.it;
marinelli@deemail.poliba.it;
monopoli@deemail.poliba.it;
zanchetta@deemail.poliba.it
http://www-dee.poliba.it
Power quality monitoring is a relatively recent problem but its complexity
has been already proved. In fact, the propagation of the harmonic distortion has
been affecting the electrical networks for several years, but it is recently
assuming a growing importance because of the large diffusion of non-linear
loads. Hi-fi, computer, discharge lamp, battery charge, UPS, electrical drive
are typical distorting loads.
In this work two new indices to evaluate the quality of the power absorbed by a
non-linear load have been proposed. They rely on voltage and current waveform
measurements at the point of common coupling. Several simulations and
experimental tests have been carried out and they have proved that these new
indices are less sensitive to the network voltage conditions than the
traditional ones.
They are able not only to give an estimate of the harmonic distortion of the
current flowing in an electrical network, but they can also evaluate the
responsibilities of distributors and customers.
EMI Interference Suppression in Symmetrical non-regulated Power Supply for
High Immunity Audio Power Amplifier.
F.P. Ridao, J.M. Carrasco, and L.G. Franquelo.
Dpto. Ingeniería Electrónica.
Escuela Superior de Ingenieros de Sevilla.
Camino de los Descubrimientos s/n, 41092- Sevilla, SPAIN.
Tlf: +34-954487362, Fax: +34-954487373.
E-mail: carrasco@gte.esi.us.es
Different non-regulated symmetrical power supplies for audio power amplifier
are presented in this work, where the conducted interference to the ac power
grid, measured by a LISN, has been suppressed to the minimum. EMI measurements
in different topologies have been compared in this paper. Also, several
conventional EMI suppression components have been tested in these topologies in
order to reduce EMI interference. As a result several rectifier circuits for
main power supply with very low emissions are presented in this paper based on
fast rectifier diodes.
Conducted electromagnetic interference propagation in power
electronic converters with transformers
J. Luszcz, K. Iwan, J. Nieznanski
Technical University of Gdansk
Electrical and Control Engineering Department
ul.Narutowicza 11, 80-952 Gdansk, Poland
tel. +48 58 347 2534 fax. +48 58 341 0880
jlusz@ely.pg.gda.pl,
kiwan@ely.pg.gda.pl,
jniez@ely.pg.gda.pl
The paper presents the results of research into the propagation of
interference currents and voltages through two-winding pulse transformers. A
novel circuit model of the high-frequency transformer is proposed and discussed.
The model was developed expressly for the studies of interference generated by
power electronic converters. It takes into account the stray capacitances
inevitably existing in real transformer windings. The model has been validated
by both simulation and experiments.
Control of 50Hz-16Hz2/3 inverter for 15kV railways network
Guillaume de Preville (*), Olivier Lapierre (**), Daniel Matuszak (**)
(*) Alstom Power Conversion, 610 Epsilon Drive Ridc North Park Pittsburgh PA 15238
Tel +1(412) 963 32 37 Fax +1(412)967 69 43
(**) Alstom Power Conversion, 3 Avenue des trois Chenes Belfort
Tel +33(0)3 85 55 18 79
Fax +33(0)3 84 55 19 49;
Tel +33(0)3 85 55 16 99 Fax +33(0)3 84 55 19 49
Static Frequency Converters (SFC) are more and more used to supply the
railways single phase grid 16Hz2/3 and 25Hz. This paper shows a two SFC
realisation 15MVA 16.5kV 16Hz2/3 each for the Swedish railways transportation in
3 level GTO technology. Focus of this article is power control of the Static
Frequency Converter, after a brief description of the equipment. The control of
the SFC guarantees an appropriate operation at all possible states of the
railway grid (i.e. single supply, parallel operation with rotating converter and
others substations)
DS3.9: Topic 11: System Engineering II
A. Binder, Darmstadt University of Technology, Germany)
Contactless inductive energy transmission systems with large air
gap
Dr.-Ing. Rudolf Mecke
INSTITUT F. AUTOMATION U. KOMMUNIKATION MAGDEBURG
Steinfeldstraكe 3
D-39179 Barleben, Germany
Tel.: +49 39203 81054, Fax: +49 39203 81100
e-mail: rme@ifak.fhg.de
http://www.ifak.fhg.de
Contactless inductive energy transmission over a large air gap becomes more
and more attractive for different applications. The paper investigates the
influence of geometrical and electrical parameters on energy transmission of
different contactless magnetic assemblies with air gaps of several centimetres.
The investigations are carried out by means of flux simulation and measurements.
Especially the dimensions of the primary and secondary system, the air gap
lenght and the number of turns determine the transmission behaviour. The
efficiency of contactless energy transmission systems is mainly influenced by
the transmission frequency. In particular the efficiency of systems with a large
air gap can be considerably improved by using higher transmission frequencies in
the range of approximately 100 kHz. Therefore, a high frequency phase-shifted
controlled IGBT-inverter is developed.
The influence of the non-linear ferrite characteristics on the attenuation
of power line filters
P. Horst, M. Albach
Lehrstuhl für Elektromagnetische Felder
Friedrich-Alexander-Universitنt
Cauerstr. 7
D – 91058 Erlangen, Germany
+49(0)9131 85 - 28952 (phone) / - 27787 (fax)
M.Albach@emf.e-technik.uni-erlangen.de
Based on a 6-pole description of mains filters a simultaneous analytical
calculation of both common mode and differential mode attenuation is presented.
This procedure takes into account the various parasitics of the components and
also the complex impedance of the power supply. The conversion of dm-noise to
cm-noise is easily predictable from the simulation. Furthermore the influence of
the non-linear characteristics of the ferrite grades on the attenuation is
investigated.
Broken rotor bar detection in electrical drive using electromagnetic high
frequency signals
E.Charnal, G.Clerc, L.Nicolas
CEGELY
36 Avenue Guy de Collongues BP 163
69131 Ecully, France
04 72 18 61 05/04 78 43 37 17
emmanuel.charnal@eea.ec-lyon.fr
http://trotek05.trotek.ec-lyon.fr
In this paper, the electromagnetic radiations of an induction motor, driven
by a PWM inverter, are analysed in order to obtain information for the detection
of broken rotor bars. Significant variations of the electric and magnetic field
spectrums between healthy rotor and rotor with broken bar are observed. The
high-frequency spectral analysis of axial radiations provides a new method to
detect broken rotor bars in a motor driven by a PWM inverter.
Bearing Current Pulse Rate in Standard PWM Drives
Adam Kempski*, Ryszard Strzelecki*, Robert Smoleński*, Jacek Bojarski**, Marius Klytta***
(*) INSTITUTE OF ELECTRICAL ENGINEERING
TECHNICAL UNIVERSITY OF ZIELONA GORA
ul. Podgórna 50, 65-246 Zielona Gora, Poland
phone: (+48)(0-68) 32-82-342, fax:(+48)(0-68)325 46 15
e-mail: a.kempski@iep.pz.zgora.pl
(**) INSTITUTE OF MATHEMATICS
TECHNICAL UNIVERSITY OF ZIELONA GORA
e-mail: j.bojarski@im.pz.zgora.pl
(***) UNIVERSITY OF APPLIED SCIENCES GIESSEN-FRIEDBERG
Wiesenstrasse 14, 35390 Giessen, Germany
phone: (0641) 309 19 30/ 19 00
This paper examines AC motor bearing currents (Electric Discharge Machining –
EDM) resulting from a common mode (CM) voltage in a drives fed by PWM voltage
source inverters. Subject literature of the problem of bearing currents has been
primarily concerned with theoretical analysis of bearing current phenomena and
possible mechanisms for bearing damage [1-4]. It has been rarely related to the
quantitative results of the bearing currents appearance. However, it is a
reasonable assumption that an amplitude and the number of EDM current pulses in
a duty cycle are the most important rate–determining factors of premature
bearing damage. In this paper we present the experimental results of the
distribution of an amplitude and a rate of bearing current pulses. Parameters of
the distribution have been also determined. They can be the basis of comparative
analysis of influence of the CM current mitigation methods on the risk of
electrically induced bearing damage. Especially, we focus on the improved
systems with a CM choke and a CM transformer and an active filter for the CM
voltage cancellation.
Application of genetic algorithm in double tuned filters design
Ryszard Klempka
University of Mining and Metallurgy
Al. Mickiewicza 30, 30-059 Kraków, Poland
tel.: (4812) 617 28 09; fax: (4812) 633 22 84
klempka@tsunami.kaniup.agh.edu.pl
Zbigniew Hanzelka
University of Mining and Metallurgy
Al. Mickiewicza 30, 30-059 Kraków, Poland
tel.: (4812) 617 28 09; fax: (4812) 633 22 84
hanzel@uci.agh.edu.pl
Passive power harmonic LC filters still are a common way of reduction of the
voltage distortion. One of the possible configurations is a double tuned filter
used in large power systems and in specific industrial applications. Design of
such a filter can be brought to solution of multi-criterial optimisation problem
applying the genetic algorithm. The paper presents an original programme
developed in the MATLAB environment, employing in its first part such
algorithms, designed to higher orders filters design. Comparison of results
obtained by means of other methods with the results obtained using the genetic
algorithm indicates on substantial usability of the proposed method. The second
element of the design procedure is modelling of the whole system: supply network
- load - filter in order to verify values of voltages and currents in the system
components in various states of operation and failure states. This ensures
proper choice of the filter components ratings.
Visual Diagnostics Based on Image Wavelet Transform
Željko Hocenski, Snježana Rimac-Drlje, Tomislav Keser
Josip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering
Kneza Trpimira 2b
HR-31000 Osijek, Croatia
Phone: ++385 31 208 900; Fax: ++385 31 208 905
e-mail: zeljko.hocenski@etfos.hr;
rimac@etfos.hr;
tomislav.keser@etfos.hr
http://www.etfos.hr
The image processing described in this paper is used for visual quality
control in ceramic tile production. The tiles surface quality is described by
the surface defects. The described image processing is based on the discrete
wavelet transform method. The diagnostic algorithm is described. It is based on
comparing of the wavelet coefficients of the original image without surface
defects and the real images of ceramic tiles. The method is verified by using
the artificial defects on the image and sensitivity testing on failure contrast
and size is done. The algorithm is evaluated experimentaly using the real tile
images. The analysis of the detection capabilities and sensitivity expressed in
nondetected failures and false proclaimed defect is done also. Optimal
connection between the segment size and DSL for each type of surface failure
could be used to make efficient system for quality control and failure
classification in automated production process.
Active Power Levelling with Capacitor Energy Storage
Mieczyslaw Nowak, Jarosław Matulka, Roman Barlik
Warsaw University of Technology , Institute of Control and Industrial
Electronics
ul. Koszykowa 75 02-662 Warsaw, Poland
phone. (+48) –22 6607675, fax. (+48)~22 625 66 33
e-mail: mnowak@ee.pw.edu.pl
The paper concentrates on the use of DC capacitor energy storage for
compensation of power pulses caused by a specific type of load (i.e. drives,
welding etc. ). Two different solutions have been taken into consideration and
presented in the paper. The first one – very simple and economic, depends on
power pulse compensation affecting the DC voltage intermediate link in the
converter plant. Control of such a DC/DC converter can be done very simply with
the use of analogue technology. The second solution, more universal, because
although the use of a three phase PWM line converter which can generate all
power components is more complicated and expensive it may be economical as a
development or supplement of a complex power conditioning system. Control in
this case is also quite complex and needs the use of a powerful DSP. Both
solutions are presented but the main considerations are designed for universal
AC grid active power consumption levelling.
Power System Reinforcement Based On Reliability Evaluation
Nuran YÖRÜKEREN1, Semra ÖZTÜRK2
The University of Kocaeli , Department of Electrical Engineering
41100 İZMİT /KOCAELİ
Tel : +90 262 3351168 (1235-1225)
1e-mail : yorukeren@hotmail.com , 2e -mail : semra@kou.edu.tr
The basic function of a power system is to supply electrical energy for
customers with electrical energy as economically as possible and with an
acceptable degree of reliability and quality. Reliability evaluation involves
the joint analysis of the generation, transmission and distribution facilities
and is an important aspect in the planning and operation of the power systems.
When large power systems are studied it is very useful to develop a technique
for reinforcement based on reliability evaluation for parts of the systems. In
this study, a probabilistic function representing the loss of revenue due to
service interruption is proposed. Also a technique based on sensitivity of this
function to the FORs (Forced Outage Rates) of system components is presented to
carry out the reinforcement.
Managing ultracapacitors energy to feed electric vehicles DC bus
A. Djerdir1, D. Bouquain2, H. Gualous1, A. Berthon1
1L2ES, IGE 2 AV. Jean Moulin 90000 Belfort
2CREEBEL 1, rue Morimont 90008 Belfort
djerdir@ige.univ-fcomte.fr
The aim of this paper is to insert the ultracapacitors into an electric
vehicle. Ultracapacitors are intended to drive electric motors when overloaded.
They also recover energy coming from motors during an electric braking. Finally,
they are charged starting from the vehicle DC bus. A DC/DC converter able to
carry out the above functions and based on the boost/buck topology has been
proposed.
Investigation of the Mechanical Fault Detection Method for Inverter Fed
Three Phase Induction Motors
Zhongming Ye, Member of IEEE and Bin Wu, Senior Member of IEEE
Department of Electrical Engineering, Ryerson Polytechnic University
350 Victoria St., Toronto, Ontario, Canada, M5B 2K3
Tel: 416-979-5000-6484, Fax: 416-9795280
zmye@ee.ryerson.ca,
bwu@ee.ryerson.ca
Fault diagnostics of induction motor drive system can be achieved online
through the Motor Current Signature Analysis Method. The advantages are obvious:
the algorithm can be implemented in the control system scheme with the existing
DSP controller and current transducers. Therefore no extra cost is required.
However, owning to the fact that the monitored signal is rich in harmonics, with
frequent dynamics, and the fundamental frequency of the drive changes within a
wide range, the traditional method based on FFT analysis, does not meet the
requirement.
A novel online fault diagnostic algorithm for electrical faults of induction
motors fed by variable speed drive is studied. The innovative approach features
wavelet analysis and artificial neural network method. A new set of feature
coefficients of the mechanical faults is extracted from the stator current by
wavelet packet decomposition. The features are represented with different
frequency resolutions. And because of the wavelet function, such a feature
extraction method can be used for current signal with transients. It is also
found that as long as the samples of each cycle is kept constant, the node
numbers of the feature coefficients for the rotor bar breakage will always be
around some of the certain nodes at certain Depths, despite the change of the
fundamental frequency. These features are advantageous for the fault detection
for induction motor drive system where there are many transients, rich harmonics
distortion, and variable fundamental frequency. Multiple-layer perceptron
network is employed as a tool for the detection algorithm. The feature
coefficients with multiple frequency resolutions and the slip speed are used as
the inputs of the artificial neural network. The proposed algorithm is evaluated
on a 5 HP induction motor drive system and is proved to be able to distinguish
between healthy and faulty conditions with high accuracy.
Limitation of small DC motor drives due to the EMC EEC Standards
L. Ferraris
Dept. of Electrical Engineering - Politecnico di Torino
Corso Duca degli Abruzzi 24
10129 Torino - Italy
Ph: +390115647160 – Fax: +390115647199
luca.ferraris@polito.it
The EEC Standards establish important limitations for any kind of electrical
apparatus under the point of view of EMC problems. That implies heavy
restrictions to the Power Electronics technical freedom. In this paper the
important sector of small phase-controlled DC drives is studied. After an
introduction to the problem a deep analysis is carried out, obtaining the
maximum adoptable power for such devices depending on the voltage. The legal
constraints result very heavy.
Energy Storage for Industrial Processes
Roger G. Lawrence, PE
Suite. 3100, 1017 Main Campus Dr.
NCSU, Raleigh, NC 27606, USA
(919) 515-6682 / (919) 515-5123
rogerlawrence@rglsolutions.com
Kim L. Craven, PE
Duke Power
Charlotte, NC 28201, USA
(704) 382-3289 / (704) 382-9849
klcraven@duke-energy.com
The provision of energy storage enables industrial processes to ride through
the potentially devastating effects of the temporary loss of electrical supply.
This paper describes two energy storage devices: a low speed flywheel providing
energy to an extruder and an ultra capacitor providing energy to a water pumping
system.
Challenges and limitations of All Electric Ship designs
A.J.Blokland, E. van Dijk
Directorate Material Royal Netherlands Navy
Department of Naval Architecture and Marine Engineering
P.O. Box 20702
2500 ES The Hague, Netherlands
fax. : ++ 31 70 316 3131
e-mail :
martech.bve@dmkm.navy.dnet.mindef.nl
Enhanced safety requirements and tight economical benefits influence the
merchant ship design. Life cycle costs, survivability aspects and robust design
play an important role in naval architecture for the Royal Netherlands Navy
(RNlN). New developments in power electronics and drives make it possible to
improve the reliability of the platform and reduce life cycle costs of new ship
designs. The impact in the ship design is evaluated by replacing the
conventional energy system by new All Electric Ship (AES) concepts. Following
lessons learned during the design and commissioning of the integrated electrical
system of the PLD HNlMS Rotterdam and new hydrographic vessels a comparative
analysis of the stability, EMC and load management in electrical distribution
configurations is given.
This paper presents a survey of the influence on reliability, life cycle costs
and technical consequences applying power electronics in electrical energy naval
ship system designs.
Induction Motor Load Effect Diagnostic Utilizing Instantaneous Power
Spectrum
M’hamed. Drif (1) , N.Benouzza (1) , A.Bendiabdellah (1) and J.A.Dente(2)
(1) University of Science and Technology of Oran, Algeria
E-mail:drif@mail.univ-usto.dz Fax 213-41-425509
(2) Instituto Superior Técnico, Lisbon, Portugal
Since a load's failure, like a dip of torque for example, has an effect on
the machine supply current , then the current spectral analysis approach could
be well suited for the study of load anomalies. But the current signature
obtained depends on various phenomena and therefore a misunderstanding of the
results is quite possible.
In this paper an attempt has been made to investigate the monitoring and the
diagnostic of a load connected to an induction motor by the use of the
instantaneous power spectrum approach.
The paper presents at first the effect of different load anomalies, in
comparison with other machine anomalies such as broken bar faults. Simulation
results are then presented for each kind of load anomalies.
The relative merits of the instantaneous power spectrum approach can be well
appreciated when its results are compared with those obtained from the current
spectrum approach.
DS3.10: Topic 13:
Education
(R.
Magdalena Stephan, COPPE/EE/UFRJ, Brazil,J. Kolar,
ETH Zürich, Switzerland)
Development of Advanced Courses on Power Electronics
Ĺupčo V. Karadžinov1), Tomislav A. Džekov1) and David C. Hamill2)
1) Faculty of Electrical Engineering, Saints Cyril and Methodius University,
Karpoš II b.b., P.O. Box 574, 1000 Skopje, Macedonia, Tel.: + 389.2.399102,
Fax: + 389.2.364262, E-mail: L.Karadzinov@ukim.edu.mk
2) Surrey Space Centre, University of Surrey, Guildford,
Surrey GU2 5XH, United Kingdom, Tel. +44.1483.300800 ext. 2629,
Fax: +44.1483.876021, E-mail: D.Hamill@surrey.ac.uk
The paper
presents development of undergraduate and postgraduate advanced courses on
Power Electronics at the Faculty of Electrical Engineering, Saints Cyril and
Methodius University in Skopje, Macedonia. A modern and well-equipped
laboratory is also establishes. The courses are developed under Tempus Phare
Program of the European Union and lectured by eight professors from five European
Union universities.
Modelling and simulation of H-Multilevel Inverters
J. Rodrيguez, P. Correa, P. Lezana
Dept. of Electronics, Universidad Técnica Federico Santa Marيa.
Phone: 56-32-654203, Fax: 56-32-797469
Casilla 110-V, Valparaيso,Chile
E-mail:
jrp@elo.utfsm.cl
Abstract: This paper presents the simulation of a switching strategy for
multilevel cascade inverters, based on the space vector theory, developed in
Matlab-Simulink and Simplorer. The proposed switching strategy generates a
voltage vector with very low harmonic distortion and reduced switching
frequency.
Strategies for increasing
enrolments in undergraduate power electronics and drives courses
Simon
Round and Richard Duke
UNIVERSITY OF
CANTERBURY
Department of Electrical and Electronic Engineering
Christchurch, New Zealand
Telephone: +64-3-3642-867 Fax: +64-3-3642-761
s.round@elec.canterbury.ac.nz
http://www.elec.canterbury.ac.nz
Multimedia CAI Program of Power Electronics for College Students
Toshiyuki Kanmachi, Toshihiro Kanno *Itaru Ando, Keimei Kaino
Sendai National College of Technology *
1, Kitahara, Kamiayashi, Aoba-ku
Sendai, JAPAN 989-3124
Phone:+81-22-391-6126
Fax:+81-22-391-6144
E-mail: kanmachi@cc.sendai-ct.ac.jp
kaino@cc.sendai-ct.ac.jp
Kanno.Toshihiro@toei-electric.co.jp
http://www.sendai-ct.ac.jp
Akita National College of Technology
1-1, Bunkyou, Iijima,
Akita, JAPAN 011-8511
Phone:+81-18-847-6047
Fax:+81-18-857-3191
E-mail:i-ando@ipc.akita-nct.ac.jp
http://www.ipc.akita-nct.ac.jp
In this paper, a CAI (computer assisted
instruction) program for technical college students to learn control theories
of inverters and induction motors is described. This program consists of some
lectures, which use multimedia slide shows and some experiments in which
students will be interested. Using this multimedia program they can get good
understandings of how to use inverters and induction motors in practice. The
efficiency of this CAI program, which is confirmed by some questionnaire, will
be shown.
Simple Cheap Converters for the Classroom
Martin Ossmann
Aachen University of Applied Sciences
Eupener Str. 70
52066 Aachen, Germany
Phone: +49-241-6009-2135
e-mail: ossmann@fh-aachen.de
We show a family of simple converters for use in the classroom. Showing the
basic topolo-gies (buck,boost,buck-boost,flyback) the student can be introduced
to the functionality and problems of power conversion. The circuits are cheap
and inherently save. They can be used in a ¯rst introductory electronics course.
By building the circuits and making measurements and simulations the students
gain insight into many speci¯c topics of electronics engineering like:
measurement, devices, topologies, magnetics, control.
DSP based Emulator for Wind Power Generation Systems
Narciso Moreno Alfonso, Juan Manuel Carrasco Solís, Eduardo Galván Díez, Manuel
Perales Estévez, Leopoldo García Franquelo
Dep. of Electronic Engineer. Escuela Superior de Ingenieros.
Avda. Camino de los Descubrimientos s/n. 41092.
Sevilla, Spain
+34 95 4556980/+34 95 4282777
narciso@cica.es
http://www.eup.us.es/personal/narciso
A DSP based Wind Turbine Emulator System is presented. It consists on
two-levels software and a workbench of two electrical machines. A high level
software (called WindTE®) have been developed for a PC, in a MsWindows style.
This software presents the wind to the system and carry out control algorithms
for optimal control of maximum wind energy extraction and sets the work-point of
the Wind Turbine. A low level software integrated in a DSP develops the vector
control of AC generator current and sets the work point of the power electronics.
A set of two coupled electrical machines emulates the complete Wind Generator
system. An AC induction motor acts as a generator which is feed by a DC machine
acting as the Wind Turbine and emulating the wind profile presented by the high
level software WindTE. The generator is connected to the grid using IGBTs, so it
is possible to emulate many types of Wind Power Generation System, scalled to
the mechanical system used.
Multimedia Laboratory for Power Electronics
Željko Jakopović *, Zvonko Benčić ** and Viktor Šunde ***
FACULTY OF ELECTRICAL ENGINEERING AND COMPUTING
Unska 3
Zagreb, Croatia
Tel./Fax. +(385 1) 6129-804 / 6129-705
The paper presents multimedia laboratory for power electronics dedicated for
undergraduate and graduate power electronic courses. Concept of multimedia
laboratory is based on simultaneous application of different teaching techniques
to make courses more attractive and understandable. Video projection equipment
is used for presentation of short video-clips or prepared simulation-clips, to
introduce students into exercise. Exercise consists of simulation and
real-circuit measurement component based on the same converter circuit. Each
component of exercise is important for student’s ability to synthesize knowledge
obtained at lectures and literature, and to reach some practical experience.
Computers in the lab are networked and Internet access if fully utilized in the
lab. Exercises for basic power electronic courses ere developed and described,
but this concept is fully applicable for advanced power electronic courses.
Creation of Web-Based Learning Materials for an MSc in Power Electronics
and Drives
J P Glew, A J Forsyth & O J Westmancott
School of Electronic and Electrical Engineering
The University of Birmingham
Edgbaston - Birmingham B15 2TT - UK
Tel: (0) 121 414 3495 Fax: (0) 121 414 4291
j.p.glew@bham.ac.uk
W F Wallace & C M Johnson
School of Electronic and Electrical Engineering
The University of Newcastle
Newcastle NE1 7RU - UK
Tel: (0) 191 222 6000
P Naylor & J C Clare
School of Electrical and Electronic Engineering
The University of Nottingham
Nottingham NG7 2RD - UK
Tel: (0) 115 8466 353
The Universities of Birmingham, Nottingham and Newcastle are developing on
line distance learning materials, for an MSc in Power Electronics and Drives, to
support part time students based in industry. The Engineering and Physical
Sciences Research Council (ESPRC) funds the project. The paper details the
development of the project from inception to production of first phase materials
and outlines details of how the programme will be run by the three Universities.
Results of the preliminary evaluation of course material are presented.
Discussion of Problem-Based Learning for Teaching Advanced Power
Electronics Techniques in a Laboratory Setup
CHENG K.W.E.1, Mok V.Y.T.2, Xue X.D.1, Chan
K.W.1
1Department of Electrical Engineering,
The Hong Kong Polytechnic University, Hong Kong
Email: eeecheng@polyu.edu.hk
2Centre for Continuing and Community Education,
The Open University of Hong Kong, Hong Kong
This paper discusses the application of problem-based learning to the Power
Electronics course. The resonant technique is one of the difficult areas of
study. A Problem-based learning method of an engineering subject is proposed and
the results after the students have undertaken a range of PBL problem of the
resonant techniques is investigated. Evaluation of this method of teaching was
obtained from the students’ performance in the final examination. The result
shows the students have obtained better understanding of the advanced topic.
Simplified analytical description of static converter in the time and
frequency domain
Grzegorz Skarpetowski
Bombardier Transportation
Brown, Boveri Str. 5
CH 8050 Zurich, Switzerland
tel.+4213181213, fax. +4113182450
grzegorz.skarpetowski@ch.transport.bombardier.com
The paper explains in more detail the basics of the analytical converter
description presented by the author in previous papers. [3,4,5]. In these
publications, the information is presented in very condensed form, and it would
appear that not all elements of the theory are presented clearly enough. Some of
the letters received from different users of the theory, indicate that it is
necessary to provide additional explanations. The majority of the questions
raised concerned the property of tsd(t), the generalised function of time,
introduced by the author for describing the switching states of waves and the
converter.
Integrative Scheme/Tool for Automated Development of Switched Mode Power
Supplies based on SIMPLORER
N. Froehleke, H. D. Njiende, D. Hahm
Institute of Power Electronics and Electrical Drives
University of Paderborn
Pohlweg 47-49
33098 Paderborn, Germany
froehleke@lea.upb.de
http://lea.upb.de
P. Wallmeier
Ascom Energy Systems
Coesterweg 45
59494 Soest, Germany
peter.wallmeier@ascom.de
http://www.ascom.com
A survey about a CAE-tool for the optimized development of SMPS is presented
incl. its underlying methodology, supporting the selection of power and control
topologies by an expert system, the magnetic component and thermal design by an
enhanced modeling base for transformers and inductors, embedded into the multi
domain simulator SIMPLORER. Additionally, off-line tools for analysis of the
ever increasing multitude of new power electronic topologies and controllers
based on MATHEMATICA supplement the tool to facilitate an efficient evaluation
and comparison [1]. A design optimizer for magnetic components with solenoidal
or planar windings is accessible through the SIMPLORER simulation sheet, which
proved its capability on various applications by considerable power loss or
volume reductions.
[1] Funded by the European Community, Contract N° BRST-CT98-5310
(DG 12 - HIAS), Integrative CAE-tools for optimised development of welding power
supplies with high power density“, For information
search for „CAE-WPS“ in "dbs.cordis.lu/EN_GLOBALsearch.html"
Implementation of a Supervisory Control and Data Acquisition System as an
Educational Tool for Teaching Electrical Machines Laboratory Exercises.
M.C. Dedes, E.C. Tatakis
University of Patras
Electrical and Computer Engineering Department
Electromechanical Energy Conversion Laboratory
26500, Rio-Patras, Greece
Tel: +3061 997353, +3061 997351, Fax: +3061 997362
Email: ntentes@ee.upatras.gr,
E.C.Tatakis@ee.upatras.gr
This paper discusses our experience with introduction of computer-based
teaching techniques in the Electrical Machines’ laboratory. The problems of
laboratory work using traditional methods are reported. An alternative teaching
method that introduces computer and information science as well as automated
control systems to the educational procedure is going to be discussed. Moreover,
the implementation of a Supervisory Control and Data Acquisition (SCADA) System,
as an educational tool for the automation of laboratory exercises performance,
is presented.
An Improved Program for Snubber Design and Macromodel Generation in the
Java Environment
Regidor, Juan Claudio; Guzmán, Víctor Manuel; Giménez, María Isabel.
Universidad Simón Bolívar
Departamento de Electrónica y Circuitos
Apartado 89000
Caracas 1080-A, VENEZUELA.
Telephone: 58-2-9063719
Fax: 58-2-9063712
E-mail: jregidor@usb.ve,
vguzman@usb.ve,
mgimenez@usb.ve
This interactive CAD package, suitable for any computer platform that
supports the Java 2 language, integrates all the calculations needed for
thyristor macromodel generation, and for snubber design applied to the RC
standard snubber and to other three energy-recovering configurations, including
a new one for design with power devices encapsulated in dual-device modules. It
creates files ready to run on the SPICE simulator.
Computer-oriented course "Power electronics" for distant education
Zinoviev G.S, Gnatenko M.A
Novosibirsk State Technical University
K. Marx st. 20, Novosibirsk, 630092
Novosibirsk, Russia
(383-2) 461182
zgs@ref.nstu.ru
This training course is developed for preparing the specialists in the field
of power electronics of different levels (four) [1].It is created on the base of
computer programs package by method of ”43 in one” . It comprises four levels of
educational components: the lecture material itself on the four levels
mathematical modeling of different devices of power electronics (laboratory
works), course designing, control of the acquired knowledge on the four levels
too. Given course is used for teaching the specialists by method of distant
education.