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Jean-Francois Stumper,Sascha Kuehl,Ralph Kennel 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
A predictive current control scheme for permanentmagnet synchronous motors (PMSMs) with deadbeat performance is presented. Major problems of such control schemes are the delay of the discrete control system, machine parameter uncertainties and measurement noise. With conventional methods, the delay can be easily compensated, but the effects of uncertainties can only be handled when they are comparably slow. This paper presents a new filtering method that attenuates the negative effects of parameter uncertainties in fast transients. The predictive controller inputs are actual measurements averaged with previous current predictions. As a result, the stability range is extended, and the oscillations caused by parameter uncertainties are damped. Noise sensitivity is also reduced. The system response is not slowed down. The results are confirmed analytically and experimentally.
Dirk Paulus,Jean-Francois Stumper,Peter Landsmann,Ralph Kennel 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
A rotor position estimator for a synchronous reluctance machine (SynRM) is presented. The rotor position is directly calculated based on stator current measurements and voltage commands. For position information, two machine parameters are required, stator resistance and average inductance. The average inductance is estimated online as it is operation-point dependent. The two estimators are linearly independent and can be combined. The performance is demonstrated with experimental results.