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Sensorless control of salient PMSM drives in the transition region

Oskar Wallmark (Institutionen för energi och miljö, Elteknik) ; Lennart Harnefors
IEEE Transactions on Industrial Electronics Vol. 53 (2006), 4, p. 1179-1187.
[Artikel, refereegranskad vetenskaplig]

This paper considers speed and position estimation of salient permanent-magnet synchronousmachines (PMSMs). An estimator of phase-locked loop (PLL) type is considered. Signal injection techniques are used in the zero-speed and low-speed regions, while information found in the back electromotive force (EMF) is used for higher speeds. Particular focus is put on the transition region, i.e., the speed region where the estimator switches between signal-injection and back-EMF-based methods. It is shown that the estimator may become unstable for certain setups of machine parameters and operating conditions if the transition region is determined incorrectly. To avoid this instability, design rules for how the transition region should be determined, as well as recommended selections for all parameters introduced, are given. The results of the analysis are also supported with experimental results.

Nyckelord: Permanent magnet synchronous machine, phase-locked loop, position estimation, sensorless control, signal injection, speed estimation



Denna post skapades 2006-08-25. Senast ändrad 2009-12-09.
CPL Pubid: 21970

 

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Institutioner (Chalmers)

Institutionen för energi och miljö, Elteknik

Ämnesområden

Elkraftteknik

Chalmers infrastruktur