EPE Journal, "European Power Electronics and Drives", Volume 13, N° 3, 2003.
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Fiche : [REVUE462]
Titre : EPE Journal, European Power Electronics and Drives, Volume 13, N° 3, 2003.
Cité dans : [DIV322] Les revues EPE Journal et EPE Newsletter, février 2011.
Volume : 13
Numero : 3
Date : January, February, 2003
Site_web : http://www.epe-association.org/epe/main.htm
Stockage :
Vers : EPE Journal Volume 13-3 - Editorial
Vers : A Study of Sensorless Control of Induction Motor at Zero Speed Utilizing High Frequency Voltage Injection
Vers : Sensorless Rotor Position Control in a Surface Mounted PM Machine Using HF Rotating Injection
Vers : Sensorless INFORM-Control of Permanent Magnet Synchronous Machines
Vers : Statistic Properties of the INFORM-Method in Highly Dynamic Sensorless PM Motor Control Applications Down to Standstill
Vers : An Alternative to High Frequency Current Detection Techniques for Zero Speed Sensorless Control of AC Motor Drives
Vers : Lamination Design Variations for Improved Performance of Zero Speed Sensorless Controlled Induction Machines
Vers : PSCAD and Transmission Lines
Another special issue of EPE Journal
By B. Sneyers
By D. Drevensek; D. Zarko; T. A. Lipo
A detailed investigation of sensorless control of induction motor at zero
and very low speed based on injection of a pulsating high frequency
voltage signal is presented. A sensing technique is based on the secondary
effect of magnetic spatial non-linearity caused by saturation of the
stator laminations. Experimental and finite element results are presented.
By C. Silva; G. M. Asher; M. Sumner; K.J. Bradley
This paper presents the use of hf voltage signal injection for tracking
position in an off-the-shelf surface mounted permanent magnet machine. The
inherent low saliency of this type of machines presents difficulties and
makes the signal conditioning highly critical. In this paper the method of
space-modulation profiling (SMP) is used to obtain a magnetic signature of
the machine in order to correct for periodic errors in the position
signals. Experimental results illustrate the effectiveness of this
technique in providing position signals of high quality. These are then
exploited to provide closed loop sensorless position control of good bandwidth.
By Th. Preusser
In comparison to well-known sensorless control schemes, the INFORM® method
allows closed loop torque-, speed- and position-control of permanent
magnet synchronous motors in the whole speed range downto standstill. This
paper will look at some control schemes that have been in use for years.
It will then explain the technology used for INFORM, making use of a
varying reluctance around the perimeter of the machine to evaluate the
rotor position. The advantages and limitations of that innovative control
scheme will be pointed out and some experiences of industrial applications
will be presented. The paper concludes with a lookout on further developments.
By M. Schrödl
Industrial sensorless permanent magnet synchronous motors (PSM) working at
minimum speed of about 10 % of rated speed have been in use for some
years. However, PSM drives with high static and dynamic quality down to
standstill have just started to be in use in industry. This paper presents
a description of the properties of PSM drives using the INFORM® method for
sensorless zero-speed control even for torque-, speed and even
position-controlled applications. It is shown that the method is able to
ensure highly transient operation even at high torque (up to a few times
of rated torque) in the low-speed range. Evaluating the statistical
properties of the method [Figs. 5, 7] yields probabilities of failures
during the lifetime of the drive depending on the “INFORM quality” of the
PSM as well as on the dynamic load properties of the application. An
industrial example shows the advantageous application of the method in a
positioncontrolled series application.
By A. Consoli; A. Testa
The paper presents the main features of the Zero Sequence Technique (ZST),
a sensorless algorithm for AC motor drives able to work at low and zero
speed with full torque capability. The proposed method is different in
principle than any other sensorless technique and much simpler on the
implementation aspects, although it still belongs to the class of air gap
flux estimators. A distinctive characteristic of the approach is that it
also allows us to detect the amplitude of the air gap flux, thus
exploiting full flux sensing capability not limited to only flux position
estimation. Experimental and Finite Element Analysis results validate the
performance of the method in comparison with standard sensorless
techniques based on detecting the amplitude variation of high frequency
currents.
By Th. M. Wolbank; R. Woehrnschimmel; J. L. Machl
To realise a high-dynamic controlled operation of induction machines the
flux position has to be estimated during operation of the drive. Omitting
the shaft sensor leads to a deterioration of the performance at low
fundamental frequencies if fundamental wave models of the machine are
applied. To determine the flux position at zero speed without shaft sensor
it is thus necessary to use parasitic, non-fundamental wave effects of
standard induction machines, such as spatial saturation, slotting, or
other anisotropy. These effects are not evident in normal operation but
can be exploited using the high frequency or transient electrical
behaviour of the machine. All sensorless zero speed schemes currently
published thus make use of a high frequency or transient excitation of the
machine in addition to the fundamental wave, which are both impressed by
the inverter. The machine reaction on this high frequency excitation is
measured and the flux and/or rotor position signal estimated using special
algorithms and signal processing techniques. However, it turned out in the
past that the shape of the lamination and especially the slot geometry
have strong influence on the high frequency/transient electrical response
of the machine. Before realising a sensorless controlled drive it is thus
advantageous to have a look at the design of the machine as not any design
is suitable for a specific sensorless control algorithm. The presented
investigation is thus focused on the influence of the lamination geometry
on the resulting signals of a sensorless control scheme. The sensorless
control method applied is usually denoted as INFORM-method in literature
and is based on a transient excitation with voltage pulses. In the
transient electrical current response of the machine there are always all
saliencies present. The two most prominent saliencies are caused by
saturation and slotting. Their modulations in the control signals have to
be extracted and separated in order to obtain the flux or the rotor
position of the machine. Currently the interaction of the saliencies
limits the practical application of these methods. To investigate the
mentioned influence, measurements have been performed on five machines
with different lamination geometry. By comparing the extracted saliencies
of these machines, the influence of slot design on the sensorless control
signals is depicted. Thus the magnitudes of the two saliencies can be
influenced by a proper adjustment of the geometry. This association is
shown for the saturation saliency in Fig. 1. Depending if the flux or
rotor position is to be used for the machine control the corresponding
saliency can be boosted and the others attenuated. This results in a more
reliable extraction and separation of the saliencies and a more robust
control.
EPE Journal Volume 13-3 - Products and Applications
By F. Foucher
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