Abstracts
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Lecture Session 5
L5a: Topic 3:
Power factor correction, Modelling and simulation
(J. Kolar, ETH
Zürich, Switzerland, J. Kyyra, Helsinki University of
Technology, Finland)
Modeling and
Analysis of High Frequency Interactions between cascaded buck converters
Jean-Christophe Crebier
Laboratoire d’Electrotechnique de Grenoble
LEG-ENSIEG, INPG/UJF-CNRS UMR 5529
BP 46, 38402 St Martin d’Hères cedex,
GRENOBLE, FRANCE
Phone 33/(0)4.76.82.62.99
Fax 33/(0)4.76.82.63.00
E-mail: crebier@leg.ensieg.inpg.fr
Sergio Busquets-Monge, Robert Gannett, Dushan Boroyevich
Center for Power Electronics Systems CPES –VPI&SU
Blacksburg, VA, 24060-0111
Design and Experimental Analysis of a
Three-Phase Single-Stage 8.5kW Buck-Derived PWM-Rectifier System (VIENNA
Rectifier III)
Franz Stögerer
Technical University Vienna
Dept. of El. Drives and Machines
Power Electronics Group
Gusshausstr. 27/E372,
A-1040 Wien /AUSTRIA
Phone: +43-1-58801-37228
E-mail:
fstoegerer@ieam.tuwien.ac.at
Johann W. Kolar
Swiss Federal Institute of Technology
ETH Zurich
Power Electronic Systems Laboratory
ETH-Zentrum/ETL H22
CH-8092 Zurich/Switzerland
Phone: +41-1-6322834
Email: kolar@lem.ee.ethz.ch
In this paper a practical investigation of
a VIENNA Rectifier III is presented. The stresses on the power components are
calculated in analytical form based on the analysis of an equivalent DC/DC
converter system. This gives the basis for the dimensioning and practical
realization of a 8.5kW 400VAC/48VDC prototype of the
system. There, for system control an outer output voltage control loop and an
inner output inductor current control loop are provided and implemented on a
digital signal processor (ADSP 21061) which transfers the relative on-times of
the power transistors to an EPLD for generation of the gating signals of the
power transistors. Finally, the dependency of the efficiency, of the power
factor and of the THD of the mains current on the output power as gained from
measurements on the prototype are given.
Animation of Power Electronics and Electrical
Drives.
Peter J. van Duijsen
Simulation Research
P. O. Box 397, NL-2400 AJ,
Alphen aan den Rijn, The Netherlands
Tel: +31 172 492353
Fax: +31 172 492477
http://www.caspoc.com
Email: p.vanduijsen@caspoc.com
Dan Lascu
Politehnica University Timişoara
Faculty of Electronics and Telecommunications,
Bd. Vasile Pârvan 2, 1900 Timişoara, Romania
Phone: 0040-56-204332, ext. 642
Fax: 0040-56-190608,
Email: d.lascu@caspoc.com
In this paper a new multilevel simulation/animation tool Caspoc®, [Simulation
Research, 2001] is described, which during simulation animates the power
electronic circuit. The user sees the level of the node-voltages, the level of
the branch currents and most important, he can see the current path in the
circuit. The simulation tool can animate any power electronic circuit or
electrical drive.
Examples of power electronic and electrical drive animations are given, which
show the advantage of animation.
Design of a 2.0 kW
on – board charger for electric vehicles with sinusoidal input characteristics
E. Tatakis, N. Papanikolaou, E. Rikos
University of Patras
Department of Electrical & Computer Engineering
Laboratory of Electromechanical Energy Conversion
26500 Rion – Patras, GREECE
tel. +30.61.997351
fax +30.61.997362
e-mail:
e.c.tatakis@ee.upatras.gr
papanik@ee.upatras.gr
rikos@ee.upatras.gr
This paper presents the design procedure of a single phase 2.0kW on – board
charger for electric vehicles (EVs). The design strategy that will be followed
manages to combine the appropriate regulation of the mains current, as well as
the charging current, among with a simplified P.F.C. control loop that does not
include an input current sensing stage. Moreover, the power stage is simplified
too, as it is consisted of a single converter only and thus producing high power
density. The whole design procedure, as well as simulation and experimental
results for this charger and comparison with an additional thyristorised one,
will be presented.
L5b: Topic 4:
Application of control methods to electrical systems
(J. P.
Louis, ENS Cachan, France, G. Asher, University of Nottingham,
UK)
Fuzzy logic application for improving speed control
and captured energy using the wind speed information for wind turbines
M.M.Prats*, E.Galván*, J.M.Carrasco*, J..A.Sánchez*, L.G.Franquelo*, C.
Batista**
* Dpto. de Ingeniería Electrónica. Escuela Superior de Ingenieros. Universidad
de Sevilla
Camino de los Descubrimientos s/n 41092 Sevilla. Spain. Tel: 954487372
** MADE Energías Renovables, S.A. Torre Europa. Pº Castellana 95, planta 29,
28046 Madrid. Spain
This paper describes a fuzzy logic application for improving the variable speed
and blade pitch wind turbine performance. The simulated model is going to be
implemented using a programmable logic controller as the fuzzy controller
designed. The used fuzzy controller as well as improving transition between
power optimization and power limitation of the wind turbine at rated wind speed,
it also permits to improve the captured wind energy at high wind speed working
conditions using wind speed as input controller.
Use of Co-simulation in the Design of Control
Devices for Static Converters
Régis Ruelland Guillaume Gateau J.C. Hapiot
Laboratoire d’Electrotechnique et d’Electronique Industrielle
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
URL : http://www.leei.enseeiht.fr/
email : {ruelland,gateau,hapiot}@leei.enseeiht.fr
e-mail:
ruelland@leei.enseeiht.fr
gateau@leei.enseeiht.fr
haiot@leei.enseeiht.fr
A new stage called co-simulation in the design cycle of the control devices
dedicated to power electronics applications is proposed. In a first part, the
interest of this new stage and the establishment of a co-simulation environment
is explained. Then, the co-simulation environment is used in the design and the
implementation of a non-linear control for multi-cell converter.
Near-time-optimal position control of electrical drives with reluctance
synchronous motor
Vittek, Ján*, Dodds, Stephen J.**
*University of Žilina, Dept. of Electric Traction and Energetic, Velký diel, 010
26 Žilina, Slovak Republic, tel.: +421 89 513 2155
fax: +421 89 565 4963
e-mail: vittek@fel.utc.sk
**University of East London, Dept. of Electrical and Electronic Engineering, 4
University Way, London E16 2RD, UK
tel.: +44 208 223 2379
fax:+44 208 223 2874
e-mail:s.j.dodds@uel.ac.uk
A new approach for the position control of electrical drives with reluctance
synchronous motors is presented. The principles of time optimal control and
forced dynamic control are combined to form a nearly time optimal position
control performance in drives equipped with controllers enabling close following
of time varying reference position inputs. The position response of a real time
model of the closed-loop time optimal control system provides the reference
input to the drive control loop. The method is applied here to reluctance
synchronous motor with speed control loops based on forced dynamic. Simulation
results confirm the near time optimal performance.
Wide Bandwidth Single and Three-Phase PLL Structures
for Utility Connected Systems
Sidelmo Magalhães Silva
sidelmo@ieee.org
Lícia Neto Arruda
licia@ieee.org
Braz J. Cardoso Filho
cardosob@cpdee.ufmg.br
Universidade Federal de Minas Gerais
Av. Antônio Carlos, 6627. Pampulha
Belo Horizonte, MG. Brazil
CEP: 32170-010
TEL: +55 (31) 34994841
Phase-locked
Loop (PLL) systems have been widely used in many applications involving
automatic control, such as communications, instrumentation and electric drives.
This paper presents a detailed study of a PLL structure for three-phase
grid-tied systems. Its operation under utility distorted conditions is
analyzed, as well as its ability to give quasi-instantaneous information of
phase, frequency and amplitude of the utility voltages. Additionally, a new PLL
structure for single-phase systems is introduced. This new PLL is compared with
the conventional zero-crossing PLL type. Small signal models and dynamic stiffness characteristics for
the PLL's are presented. Experimental results from a DSP-based system are
included to support the theoretical analysis.
L5c: Topic 6: PM and
SR motor drives
(W. Schumacher, T.U. Braunschweig, Germany, J.
Reinert, Emotron AB, Sweden)
Very Simple Robust Digital Position Control Algorithm of PMSM using
Neural Network with State Feedback
Jong-Sun Ko, Sung-Koo Youn
School of Electrical-Electronic and Information Engineering, Wonkwang University
344-2 Sinyong-Dong
Iksan, South Korea
+82-63-831-6134
jsko@wonkwang.ac.kr
A very simple control approach using neural network for the robust position
control of a Permanent Magnet Synchronous Motor (PMSM) is presented. The linear
quadratic controller plus feedforward neural network is employed to obtain the
robust PMSM system approximately linearized using field-orientation method for
an AC servo. The neural network is trained in on-line phases and a feedforward
recall and error back-propagation training compose this neural network. Since
the total numbers of nodes are only eight, this system easily is realized by the
general microprocessor. During the normal operation, the input-output response
is sampled and the weighting value is trained multi-times by error
back-propagation method at each sample period to accommodate the possible
variations in the parameters or load torque. And the state space analysis is
performed to obtain the state feedback gains systematically. In addition, the
robustness is also obtained without affecting overall system response. A
floating-point Digital Signal Processor DS1102 Board (TMS320C31) realizes this
method. This board provides a free 6.2'' length Industry Standard Architecture
(ISA) slot with 16-bits connector. The basic DSP software is used to write
C-program, which is compiled by using ANSI-C style function prototypes.
IPM Synchronous Machine Drive
Response to Symmetrical and Asymmetrical Short Circuit Faults
Brian A. Welchko†
Thomas M. Jahns†
†Dept. of Elect. and Comp. Engr.
University of Wisconsin-Madison
1415 Engineering Drive
Madison, WI 53706, USA
Tel: 608-262-5702
Fax: 608-262-5559
e-mail: bwelchko@ieee.org
e-mail: jahns@engr.wisc.edu
Wen L. Soong‡
‡University of Adelaide
Dept. of Elect. & Elect. Engr.
Adelaide
South Australia 5005
Tel: 61 8 8303 4117
Fax: 61 8 8303 4360
e-mail:
wlsoong@eleceng.adelaide.edu.au
James M. Nagashima*
*General Motors - Advanced Technology Vehicles
3050 Lomita Blvd.
Torrance, CA 90505
Tel: 310-517-5966
Fax: 310-517-5766
e-mail: NagashiJ@pcssmtp.hac.com
A closed-form solution is presented for the
steady-state response of interior permanent magnet (IPM) synchronous machines
to symmetrical short circuits including the effects of q-axis magnetic saturation.
Machine response to single-phase asymmetrical short circuits is also
investigated. Experimental data is
presented to verify predicted behavior for both types of short circuits. It is shown that single-phase asymmetrical
short circuit faults produce more severe fault responses with high pulsating
torque and a significant threat of rotor demagnetization. A control strategy that purposely transitions
such faults into symmetrical three-phase short circuits can minimize the fault
severity and associated demagnetization risks.
Implications for the design of IPM machines with improved fault
tolerance are discussed.
On The Performance Improvement of A
Novel Hybrid Type Switched Reluctance Motor
Jun OYAMA, Tsuyoshi HIGUCHI, Takashi ABE, Toshinori TANAKA, Eiji YAMADA
Department of Electrical and Electronic Engineering, Nagasaki University
1-14 Bunkyo-Machi
Nagasaki, JAPAN
+81-95-847-1111/+81-95-846-7379
e-mail:oyama@net.nagasaki-u.ac.jp
http://:www.ec.nagasaki-u.ac.jp
In the previous paper, we proposed a cylindrical stator hybrid type switched
reluctance motor (SRM) which had a pair of permanent magnets attached on the
rotor between the poles. The improvement in the characteristic was confirmed by
adopting the permanent magnet torque combined with the reluctance torque. This
paper describes the experimental results under an advanced firing angle and an
on-state angle control. Furthermore, a new hybrid type SRM with salient pole
stator is proposed and the design was optimized by FEM. The remarkable
improvement of machine performance in the hybrid type SRM over standard VR type
SRM is confirmed with experimental results.
Brushless-DC Motor using Soft
Magnetic Composites as a Direct Drive in an Electric Bicycle
Annette Muetze
Dep. of Electrical
Energy Conversion
DARMSTADT UNIV.
OF TECHNOLOGY
Landgraf-Georg-Straße 4
D-64283 Darmstadt
Phone: +49 6151 162167
Fax: +49 6151 166033
Email: amuetze@ew.tu-darmstadt.de
Alan Jack
Dep. Elec.&Electronic Engineering
UNIV. NEWCASTLE UPON TYNE
Newcastle upon Tyne,
Tyne, NE1 7RU, UK
Phone: +44 191 222 7343
Fax: +44 191 222 8180
Email: alan.jack@newcastle.ac.uk
Barrie Mecrow
Dep. Elec.&Electronic Engineering
UNIV. NEWCASTLE UPON TYNE
Newcastle upon Tyne,
Tyne, NE1 7RU, UK
Phone: +44 191 222 7329
Fax: +44 191 222 8180
Email:
barrie.mecrow@newcastle.ac.uk
Recent advances in materials research have
produced soft magnetic composites that can be considered for use in electrical
machines. New drive concepts are needed to fully take advantage of this new
material. An electric bicycle with a new drive with very good performance and
low cost is presented. A major part of this drive is a new brushless-dc motor
using soft magnetic composites. The motor is also suitable for other drive
applications.
L5d: Topic 13:
Education
(T. Undeland, NTNU, Norway, A. Vandenput, T.U.
Eindhoven, The Netherlands)
Environmental Engineering in the Power Electronics
Education
Annika Nilsson *, Per Karlsson **, Lars Gertmar **,***
* Department of Building and Environmental Technology
Lund University, Lund, Sweden
Phone: +46 46 222 96 15
Fax: +46 46 222 45 35
** Department of Industrial Electrical Engineering and Automation
Lund University, Lund, Sweden
Phone: +46 46 222 92 90
Fax: +46 46 14 21 14
*** ABB Corporate Research, Vنsterهs, Sweden
Phone: +46 21 32 31 31
Fax: +46 21 32 32 64
E-mail:
annika.nilsson@byggtek.lth.se
per.karlsson@iea.lth.se
lars.gertmar@iea.lth.se
Sustainable development and engineering ethics as well as social aspects of
engineering are emerging issues related to power electronics. Several important
topics like environmentally sustainable products and electromagnetic
compatibility fit into this description. Therefore, these issues have recently
become part of the advanced course on power electronics at Lund University. The
authors’ intention with the present overview paper is to share the ingredients
and results so far and to review ongoing Nordic activities that could form a
basis for others to expand from traditional power electronics. It is our firm
opinion that issues like LCA, EPR, EMC, EMI have to be addressed and highlighted
in the education of power electronic engineers.
TEACHING POWER ELECTRONICS IN 21 CENTURY
P. Bauer, J.Kolar
Delft University of Technology,
Mekelweg 4, 2628 CD Delft, The Netherlands
e-mail:
P.Bauer@its.tudelft.nl
http://ee.its.tudelft.nl/epp/A_Frames.htm
ETH Zurich; Power Electronics Laboratory
Physikstrasse 2, CH-8092 Zurich, Switzerland
e-mail:
kolar@lem.ee.ethz.ch
Web based learning tool and two projects oriented practicals for power
electronics education are introduced in the paper: problem based learning in the
first year of study (Theme project) and design oriented practical for the fourth
year of study as a supplement to lectures of Power Electronics.
Students build their own Switched Mode Power
Supplies or how to promote
Power Electronics at Universities
Heinz van der Broeck
FH-Kِlön University of Applied Sciences Cologne
Betzdorfer Str. 2
50679 Kِöln Germany
phone ++49 221 8275 2262
fax ++49 221 8275 2256
heinz.vdbroeck@fh-koeln.de
The paper presents a concept of labwork in “switched mode power supplies” for
students at
universities as a supplement to the lecture. Aim of the labwork is to make power
electronics more attractive to students, especially to those who originally
preferred non power related subjects. Three power circuits have been prepared to
be built by the students. These are a step down chopper, a flyback converter and
an electronic “DC-DC transformer” based on a series resonant converter. Within
the course the students learn to design and build reactive components, they use
a smart power IC, insert a voltage control loop and they get an impression of
resonant topologies. Thus, the laboratory work covers many different subjects of
electrical engineering. The theory is presented in the lecture while most
information of the labwork (e.g. datasheets) are available via internet. Up to
now the labwork has been carried out 2 times at the FH Kِln and the RWTH Aachen.
It found high interest among all participating students who enjoyed building
their own SMPS circuits. The success of the labwork can also be seen in the fact
that many of the students have been encouraged to chose power electronics as a
subject for their diplom thesis.
[Back to Lecture Sessions] [Back to top]
Lecture Session
6
L6a: Topic 3:
Power supplies
(J. Uceda, UPM, Spain, P. Mathys, ULB, Belgium)
Application of self-adjusting features of resonant
converters
Kuno Janson, Jaan Jevik and Toomas Vinnal
TALLINN TECHNICAL UNIVERSITY
82 Kopli Str., EE10412
Tallinn, Estonia
Tel.: +(372) 644 989 92
Fax: +(372) 620 3096
E-mail: Jaanvik@cc.ttu.ee
For supply consumers, that need approximately constant power at variable load
resistance it is suitable to use the converter with alternating parallel and
series resonance. Such converter operates like a transformer with variable
transforming ratio. The electromagnetic processes in the converter and the
converter parameters at different loads are described.
Optimised pulse modulation for plasma power supply
Peter Schmitt
Dipl. El. Ing. ETH
ETH Zürich. Professur für elektrotechnische Entwicklungen und Konstruktionen
Technoparkstr. 1
CH-8005 Zürich, Schweiz
e-mail: schmitt@eek.ee.ethz.ch
Christian Gerster
Dr. sc. techn., Dipl. El. Ing. ETH
Sulzer Electronics AG, Neue Technologien und Innovationen
Technoparkstr. 1
CH-8005 Zürich, Schweiz
e-mail:
christian.gerster@bluewin.ch
In this paper, a new modulation technique is introduced that combines
current- and voltage mode control with active pulse balancing to prevent
saturation of the transformer of a modular switched mode power supply for plasma
applications. Transformers with amorphous alloy or nano-crystallin alloy core
materials can be operated efficiently in the medium-frequency range with
resonant IGBT circuits. The switching commands for the power semiconductor are
preferably digitally generated. The modulation technique was realized with a
CPLD and tested in a digital controlled plasma supply.
Asymmetrical rectifier with isolated secondary regulation in
multiple-output applications
M. Michon, J.L. Duarte & M. Hendrix
Technical University of Eindhoven
P.O.Box 513 - 5600 MB
Eindhoven, The Netherlands
Tel: +31/(0)40-2473504/ Fax: +31(0)40-2434364
m.m.j.a.michon@tue.nl
A soft-switching DC-DC power supply with isolated multiple outputs is
described. It has the ability to provide regulation for the outputs without
using secondary-to-primary feedback signals. The rectifiers on the secondary
side are operated with asymmetrical conduction times and can be independently
regulated. As an application example, a three-output converter for feeding high
perfor-mance LEDs is analyzed, modeled and implemented. Relevant measurements
from a 50W/200kHz prototype are given.
Robust Deadbeat Control for UPS using State and Disturbance Observers
P. Mattavelli
Department of Electrical Engineering, University of Padova
Via Gradenigo 6/a, 35131 Padova - ITALY
Phone: +39-049-827.7525 Fax: +39-049-827.7599
e-mail:
mattavelli@light.dei.unipd.it
This paper investigates the use of deadbeat control on both output voltage
and inductor current for the inverter stage of Uninterruptible Power Supplies
(UPS). Besides the linear state feedback which allocates system poles in the
origin so as to achieve deadbeat response for all state variables, this paper
proposes the use of a state observer and a disturbance observer for the
compensation of the computational delay and for the estimation of the load
current, respectively. In the proposed solution, undesired oscillations on the
inductor current, which usually occur when the deadbeat control is performed
only on the output voltage, are avoided. Moreover, with a proper design of
observer parameters, it is possible to minimise the control sensitivity to model
uncertainties, parameter mismatches and noise on sensed variables, which usually
characterize existing deadbeat control techniques. Finally, an additional
control provision is proposed for the implementation of the current limitation
of the power converter. Simulation and experimental results on a single-phase
UPS laboratory prototype (1 kVA) confirm the effectiveness of the proposed
solution.
A Non-Linear Control Applied to the Half-Bridge Complementary-Control
Converter
Josep M. Guerrero, Luis Garcia de Vicuña, José Matas, Miguel Castilla
UNIVERSITAT POLITECNICA DE CATALUNYA
C. Comte d’Urgell, 187
08036 Barcelona, Spain
Telephone: +34 93 413 72 90
Fax: +34 93 413 74 01
josep.m.guerrero@upc.es
In this paper a large-signal model for the Half-Bridge Complementary-Control
(HBCC) converter is presented in order to deduce a non-linear control for this
conversion structure. The procedure proposed allows to obtain a fast controller
that provides both tight regulation and a robust voltage response against input
voltage and load disturbances.
L6b: Topic 4+5:
Advanced control of power converters
(P. B. Thoegersen, Danfoss
Drives A/S, Denmark, M. Braun, University of Karlsruhe, Germany)
Simple Digital Control of Converters using Building Blocks
Martin Ossmann
Aachen University of Applied Sciences
Eupener Str. 70
52066 Aachen, Germany
Phone: +49-241-6009-2135
Digital control of converters usually needs a fast PWM generator and fast DSP
processing.
It is shown that using the direct digital synthesis (DDS) principle it is
possible to generate a high resolution PWM-like control with much less
processing power and low clock rates. This is achived by dithering on a coarse
scale with low computational e®ort. If the Sigma-Delta principle is used as
concept for analog to digital conversion it is possible to built complete
controllers that are mainly based on digital circuitry. We show how to control
converters with simple, cheap and low-power digital circuitry with the °exibility
of software.
Results from implementations are shown. As example a single-active-switch
two-output converter
has been built where both outputs are regulated using a 8 bit microcontroller.
Optimal State Feedback Control of a Vector Controlled Current Source
Rectifier
Alfons Klönne
Christian-Abrechts-University of Kiel
Power Electronics and Electrical Drives
Kaiserstr. 2
24143 Kiel, Germany
Phone: +49 431 / 880-6104
Fax: +49 431 / 880-6103
http://www.tf.uni-kiel.de/etech/LEA
Friedrich W. Fuchs
Christian-Abrechts-University of Kiel
Power Electronics and Electrical Drives
Kaiserstr. 2
24143 Kiel, Germany
Phone: +49 431 / 880-6100
Fax: +49 431 / 880-6103
fwf@tf.uni-kiel.de
http://www.tf.uni-kiel.de/etech/LEA
Pulsewidth modulated current source rectifiers find their application in
three phase current source power converters for variable speed drives. Special
attention has to be given to the control at the line side because of the
LC-Filter with low damping constant. This investigation firstly reports the
design and analysis of the multivariable optimal state feedback control for the
current source rectifier. Here the dc link is equipped with an ohmic load. In
optimal control, the control strategy is sought that gives the best trade-off
between performance and cost of control. High stability and robustness against
parameter changes are two important advantages of optimal control. The line side
rectifier has been modelled within the separated d-q-frame. The proposed method
enables the independent control of the active and reactive component of the
supply current vector. A performance index with quadratic weighting is chosen so
that a stable operational behaviour and small resonances at the mains are
achieved. The model of the system with multivariable optimal state feedback
control was investigated in simulations with varying weighting parameters for
stationary and dynamic behaviour. Finally, the control has been implemented in a
DSP-system and FPGA-kit. Experimental results are presented to a 22 kW converter
test bench.
Robust Fuzzy-Sliding Mode Control for Motor Drives
operating with Variable Loads and Pre-defined System Noise Limits
Jesus Arellano-Padilla, G. M. Asher, Member, IEEE and M. Sumner, Member, IEEE
School of Electrical and Electronic Engineering
University of Nottingham, Nottingham NG7 2RD, UK
Tel: +44 (0)115 9515545
Fax: +44 (0)115 9515616
Email: eexja@nottingham.ac.uk
This paper reviews and develops a new approach to Fuzzy Sliding Mode Control
(FSMC) for the robust speed control of practical motor drives systems.
Robustness is achieved through the definition of real time reference transient
trajectory for the SMC switching function. This trajectory error is the input
for a fuzzy interpolation between control laws corresponding to the boundary
values of the plant parameters. The paper reviews the background of the approach
and develops design procedures for the fuzzy interpolation and membership values
to yield robust performance for a very large range of parameter variations and
hence requiring little or no knowledge of the load by a commissioning engineer.
Experimental results using a Vector Controlled Induction Machines (VCIM) for
both drive and dynamometer are presented.
Fuzzy Logic Based Pulse Width Modulation for Power
Converters
A. Dell'Aquila and M. Liserre
Dipartimento di Elettrotecnica ed Elettronica - Politecnico di Bari
via E.Orabona 4, 70125
Bari, Italy
Tel +39-080-5963.263 Fax +39-080-5963.410
E-mail: dellaqui@poliba.it
liserre@poliba.it
The aim of the fuzzy logic based Pulse Width Modulation is to obtain a direct
current control of three-phase power converters; in recent years it has already
been tested in different applications with different reference signals. In the
paper the introduction of the fuzzy modulation is motivated and its history is
described with reference to papers present in literature. A deep theoretical
analysis of how to derive the fuzzy rules both for the space-vector and
separate-phase modulations is presented and discussed with the simulation
results. Different types of algorithms for the fuzzy modulation, employing a
different number of rules are also included.
Discrete Sliding Mode Control of a DC-AC Boost
Converter
José Matas Alcalá, Luis Garciá de Vicuña, and Oscar López Lapeña
Universidad Politécnica de Cataluña
Av. Victor Balaguer s/n. (08800) Vilanova i la Geltrú
matas@eel.upc.es
vicuna@eel.upc.es
oscar@eel.upc.es
This paper proposes the design of a discrete sliding control of a boost dc-ac
converter. The sliding control surfaces are designed by imposing a desired
dynamic behavior on the system, which allows us to determine the main parameters
of the sliding mode controller, and is specially interesting in tracking
problems. This procedure leads to a discrete-time switching surfaces, which
provide robustness with regard to external disturbances, and a good dynamic
response of the output voltage.
L6c: Topic 6: DTC
and Sensorless Control
(Emil Levi, Liverpool John Moores
University, UK, F. Profumo, Politecnico de Torino, Italy)
Novel Fuzzy Logic Direct Torque Control
A. Arias, J. L. Romeral, E. Aldabas, M. G. Jayne(*)
Universitat Politècnica de Catalunya. Campus Terrassa
C. Colom 1. 08222 Terrassa. Catalunya. Spain.
Tel:+34 937398015 Fax: +34 937398016
arias@eel.upc.es
(*)University of Glamorgan.
Pontypridd. CF371DL. Wales. United Kingdom
A brief review of the classical Direct Torque Control (c_DTC) in induction
motors with its fundamental principles and schemas is realised. Once the c_DTC
is fully and deeply described, its main drawbacks are introduced. It is one of
the goals of the present paper to overcome one of the worst disadvantages of the
DTC, which is the existence of a considerable ripple in its torque response. The
reduction in the torque ripple is achieved by means of a two state modulator.
Due to the fact that the torque ripple reduction involve non-linear functions,
the two state modulator is controlled by means of a fuzzy logic controller.
Then, a novel Fuzzy Logic DTC controller, which is based on the classical c_DTC
but includes a Fuzzy Logic Controlled modulator, is fully described.
Finally, an optimised way of calculating the stator reference flux value is
presented, which can be applied in any kind of induction motor drive. This
optimised stator flux reference value not only improves the torque ripple, but
also could reduce the power consumption taken from the mains supply. Results are
shown to corroborate all the presented work.
A novel Presentation of the
direct torque and stator flux control for induction motor drives
(1&2) Ahmad Ammar NAASSANI(1), Eric MONMASSON(2), Jean Paul LOUIS(3)
Laboratoire Electricité Signaux Robotique (LESiR), IUP GEII, Université de
Cergy-Pontoise, Rue d’Eragny, Neuville-sur-Oise, F-95031 Cergy-Pontoise.
Tel (33) 1 34 25 68 91
Fax : (33) 1 34 25 69 01
e-mail :
ammar.naassani@iupge.u-cergy.fr
eric.monmasson@iupge.u-cergy.fr
(3) Laboratoire Electricité Signaux Robotique (LESiR), ENS Cachan
61, Avenue du Président Wilson, F-94230 Cachan
Tel: (33) 1 47 40 21 15
Fax: (33) 1 47 40 21 99
e-mail:
jean-paul.louis@lesir.ens-cachan.fr
In this paper, a novel approach of the DTSFC for induction machine is
proposed. Differently from basic version of DTSFC, the stator flux vector
reference is predicted using two methods. Based on one of these, the inverter
voltage vectors can be generated by several control strategies, bang-bang, SVM,
and switching table. The validity of the proposed methods is verified by
experimental tests.
A Unified Predictive DTC
Algorithm for AC Machine Sensorless Control
Maria Stefania Carmeli , Antonello Monti
Dipartimento di Elettrotecnica - Politecnico di Milano
Piazza Leonardo da Vinci, 32 - 20133 Milano (Italy)
Phone number: +39 02 2399 3702
Fax number: +39 02 2399 3703
e-mail:
carmeli@bottani.etec.polimi.it
Department of Electrical Engineering - University of South Carolina
Swearingen Center, Columbia - SC, 29208 (USA)
Phone number: +1 803 777 2722
Fax number: : +1 803 777 8045
e-mail: monti@engr.sc.edu
This paper proposes a new unified sensorless Direct Torque Control (DTC)
algorithm for AC ma-chines. The scheme overcomes the main DTC limits. In
particular a predictive algorithm able to control both stator flux and torque is
introduced and a constant inverter switching frequency is obtained. Laboratory
results on brushless and asynchronous machine are reported.
Dynamical Performances of
Sensorless Induction Motor Drive with
Different Flux and Speed Observers
T. Orlowska-Kowalska, P. Wojsznis, C.T. Kowalski
Wroclaw University of Technology
Institute of Electric Machines, Drives and Metrology
ul. Smoluchowskiego 19, 50-372 Wroclaw, Poland
Ph:(48 71) 203546; Fax: (48 71) 203467
e-mail: tok@imne.pwr.wroc.pl.
Sensorless vector control of induction motor drives requires knowledge of the
instantaneous value of the rotor flux and speed. Various methods of the rotor
flux and speed estimation were recently used, based on the mathematical models
of the induction machine, on nonlinear phenomena caused by rotor excentricity or
other motor saliences and based on neural networks. The main goal of the paper
is the comparison of chosen flux and speed observers in simulation – from the
point of view of sensitivity to motor parameter changes, as well as in
experiments - from the point of view of proper work in dynamical states and low
speed region. The four different concepts were tested: two flux simulators,
reduced and full order flux observers, with speed calculated based on estimated
flux components and so called adaptive speed observ er (MRAS) based on full
order flux observer and adaptive speed loop.
The results of simulated and laboratory tests are presented and the estimation
quality is evaluated.
Position-Sensorless Drive of the
Interior Permanent Magnet Synchronous Motor for Wide Speed Range
N. Nomura, A. Toba, T. Yamasaki, S. Ozaki, H. Ohsawa
Fuji Electric Corporate Research and Development, Ltd.
1, Fuji-machi, Hino-city, Tokyo 191-8502, Japan
TEL: +81 42 586 1102
FAX: +81 42 586 9665
nomura-naofumi@fujielectric.co.jp
A novel position-sensorless drive with torque linear control for the interior
permanent magnet synchronous motor (IPMSM) is presented in this paper. The
system has full speed-range drive capabilities from zero to and over the base
speed, which is a key requirement from the market. To save energy and to reduce
the capacity of IPMSM drive system, some methods have been reported. However, it
is difficult to realize these algorithms while controlling the torque, because
of the nonlinearity between torque and current due to the IPMSM’s saliency. To
cope with this problem, we propose a torque control method based on regulation
of the load angle. The proposed control strategy has been experimentally tested
by using three types of IPMSM, each having a different base speed. Stable
sensorless operation over the whole speed range has been obtained, regardless of
types of the motor. The system can drive IPMSM until to 7200[r/min], which is
very high speed. Therefore, the system can be applied for wide uses.
L6d: Topic 11:
System Engineering
(Mats Alakula, IEA-LTH, Sweden, U. Putz,
Consultant, Germany)
Modeling and HF Performance of
Power Cables in Electrical Motor Drives
Mario Cacciato, Alfio Consoli, Luca Finocchiaro
DEES - University of Catania
Viale A. Doria, 6 95125 Catania, ITALY
E-mail: aconsoli@dees.unict.it
Antonio Testa
DFMTFA – University of Messina
Salita Sperone, 31 98166 Messina, ITALY
E-mail: testa@ingegneria.unime.it
http://www.dees.unict.it/users/empeg/
By referring to Induction Motor Drive (IMD) systems, the present paper
investigates the influence on the power cables connecting the inverter to the
motor of dangerous motor overvoltages and electromagnetic emissions. In order to
predict such phenomena, a suitable modeling of standard cables is obtained by
finite element analysis. By connecting the model of the cable with a proper High
Frequency (HF) model of the induction machine and the converter, a
representation of the whole drive is developed. SPICE simulations are carried
out using the proposed drive model and compared with experimental results
obtained on a standard 1,1 kW induction motor drive.
Fault detection and
classification approach for a converter fed permanent magnets synchronous
machine
O. CUREA, B. DAKYO, G. BARAKAT, J. RAHARIJAONA
G.R.E.A.H. Université du Havre
25, rue Philippe Lebon, BP 540, 76058
LE HAVRE, FRANCE
Tel.: +33-2.32.74.43.31
Fax: +33-2.32.74.43.38
curea@univ-lehavre.fr
dakyo@univ-lehavre.fr
http://www.univ-lehavre.fr/recherche/greah/
The aim of the study is to carry out a converter fed machine behaviour and
malfunction from only electrical data (voltages and currents). In this purpose,
based on phasor diagram, Fourier transform and complexified power analysis, we
present here the neural networks and fuzzy logic techniques for detection and
classification.
Bond Graph
Multi-time Scale Analysis of a Railway Traction System
G. Gandanegara1, B. Sareni1,
X. Roboam1, G. Dauphin-Tanguy2
1LEEI, UMR
INPT-ENSEEIHT/CNRS No 5828
2 Rue Camichel BP 7122, 31071 Toulouse Cedex,
France
Xavier.Roboam@leei.enseeiht.fr
2LAIL,
Ecole Centrale de Lille, UPRESA CNRS 8021
BP 48, 59651 Villeneuve d’Ascq Cedex, France
gdt@ec-lille.fr
The unified formalism of bond graphs is
applicable to designing, modeling and analyzing complex and heterogeneous
physical systems. Moreover, various order-reduction methods can be applied
directly on bond graph models in order to simplify them. The aim of this paper
is to demonstrate the characteristics and the advantages of the bond graph
formalism, considering as an example, model simplification methods of a railway
traction system. Several simulations are carried out in order to validate the
simplified models. The analysis of couplings on these models highlights the
elements that cause perturbations, such as mechanical resonance.
A New Hybrid Filter Versus a Shunt
Active Power Filter
Joep Jacobs, Dirk Detjen, Rik W. De Doncker
Institute for Power Electronics and Electrical Drives
RWTH-Aachen, Germany
Jägerstraße 17-19
Aachen, Germany
Tel. +49 241 806925
Fax. +49 241 67505
jj@isea.rwth-aachen.de
http://www.isea.rwth-aachen.de
In this paper a new Shunt Hybrid Power Filter (SHPF) to compensate harmonic
currents is proposed. The SHPF comprises power factor correction capacitors and
a transformer in series. The primary windings of the transformer are fed by a
three-phase current controlled voltage source inverter. The working principle
and the control strategy of the SHPF is discussed in detail. Simulations show
the performance of the proposed filter. Furthermore, the performance of the SHPF
is compared to the performance of the well-known Shunt Active Power Filter
(SAPF). It is shown that better results are achieved with the new SHPF topology.
To verify the simulations, a laboratory prototype was built. The experimental
results of this prototype are compared to detailed simulations
Industrial characterization of the field radiated by a magnetic component. Theoretical and experimental aspects.
J. Lorange, B. Cogitore
Microspire
16, Parc d’activité du Beau Vallon
57970 Illange
Tel : 03.82.59.13.33
T. CREUZET
Institut Universitaire de Technologie 1.
Bp 67
38402 St-Martin d’Hères Cédex
J-P. Keradec, J-L Schanen,
C. Brun
L.E.G-E.N.S.I.E.G (UMR 5529)
Rue de la Houille Blanche. BP 46
38402 St-Martin d’Hères Cédex
Tel : 04.76.82.62.99
The presented work aims to characterize the magnetic field produced by magnetic components up to 50 cm far and 10 MHz. To sum up all the practical results by less than 15 parameters, we use limited multipole expansion together with related spherical harmonic functions. Measurement of loop antenna voltage needs special care because it often is in the mV range. In this paper we describe our theoretical approach and the measurement bench which has been built. To end, we present some preliminary results regarding a current loop.