High-bandwidth current control for torque-ripple compensation in PMsynchronous machines
Springob, L.
Holtz, J.
Vectron Elektronik GmbH, Krefeld;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Oct 1998
Volume: 45,
Issue: 5
On page(s): 713-721
ISSN: 0278-0046
References Cited: 11
CODEN: ITIED6
INSPEC Accession Number: 6041969
Digital Object Identifier: 10.1109/41.720327
Current Version Published: 2002-08-06
Abstract
Active compensation of torque harmonics in high-performance
synchronous permanent magnet (PM) motor drives requires high-bandwidth
current control. It is demonstrated that proportional integral (PI)
current control exhibits performance limits, even when feedforward
compensation of the rotor induced voltage and the stator inductance drop
is used. High bandwidth requirements are satisfied using a digital
deadbeat current controller. Sampling time delays are eliminated to the
extent possible by means of a current predictor. The current controller
and the predictor refer to a model of the parasitic effects of the PM
synchronous machine that is acquired and adapted to parameter changes in
real time. Stator current distortions due to deviations from the
sinusoidal flux linkage distribution are thus eliminated. The control
system facilitates compensation of high-frequency torque ripple of the
machine
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