Evaluation of Back-EMF Estimators for Sensorless Control of Permanent Magnet Synchronous Motors


Vol. 12, No. 4, pp. 604-614, Jul. 2012
10.6113/JPE.2012.12.4.604


PDF    

 Abstract

This paper presents a comparative study of position sensorless control schemes based on back-electromotive force (back-EMF) estimation in permanent magnet synchronous motors (PMSM). The characteristics of the estimated back-EMF signals are analyzed using various mathematical models of a PMSM. The transfer functions of the estimators, based on the extended EMF model in the rotor reference frame, are derived to show their similarity. They are then used for the analysis of the effects of both the motor parameter variations and the voltage errors due to inverter nonlinearity on the accuracy of the back-EMF estimation. The differences between a phase-locked-loop (PLL) type estimator and a Luenberger observer type estimator, generally used for extracting rotor speed and position information from estimated back-EMF signals, are also examined. An experimental study with a 250-W interior-permanent-magnet machine has been performed to validate the analyses.


 Statistics
Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.



Cite this article

[IEEE Style]

K. Lee and J. Ha, "Evaluation of Back-EMF Estimators for Sensorless Control of Permanent Magnet Synchronous Motors," Journal of Power Electronics, vol. 12, no. 4, pp. 604-614, 2012. DOI: 10.6113/JPE.2012.12.4.604.

[ACM Style]

Kwang-Woon Lee and Jung-Ik Ha. 2012. Evaluation of Back-EMF Estimators for Sensorless Control of Permanent Magnet Synchronous Motors. Journal of Power Electronics, 12, 4, (2012), 604-614. DOI: 10.6113/JPE.2012.12.4.604.