Hybrid Sensor-less Control of Permanent Magnet Synchronous Motor in Low-speed Region

Yasuhiro Yamamoto; Hirohito Funato; Satoshi Ogasawara

Hybrid Sensor-less Control of Permanent Magnet Synchronous Motor in Low-speed Region

Yasuhiro Yamamoto

Hirohito Funato

Satoshi Ogasawara

Vol. 8, No. 4, pp. 301-308, Oct. 2008

10.6113/JPE.2008.8.4.301

Permanent magnet synchronous motor

Stabilization control

High frequency

Separation filter

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Abstract

This paper proposes a method of improving the stability in sensor-less control of permanent magnet synchronous motors. The control method for low-speed region is divided into two: One is a high frequency method, which involves a problem of reverse rotation once misdetection of the permanent magnet polarity should occur, and another one is a current drive method, which has a problem that phase and speed oscillations are caused by quick speed changes. Hence, authors propose adoption of the current drive method for the basic control system with added compensation of stabilization by means of the high frequency method. This combination secures stable control with no risk of reversal and less vibration. In addition, authors have also considered a frequency separation filter of a shorter delay time so that current control performance will not lower even when high frequencies are introduced. This filter has achieved simplified compensation using repetitive characteristic through the utilization of the periodicity of high frequency current. Simulation and experiment have been conducted to verify that the stable performance of this system is improved.

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Cite this article

[IEEE Style]

Y. Yamamoto, H. Funato, S. Ogasawara, "Hybrid Sensor-less Control of Permanent Magnet Synchronous Motor in Low-speed Region," Journal of Power Electronics, vol. 8, no. 4, pp. 301-308, 2008. DOI: 10.6113/JPE.2008.8.4.301.

[ACM Style]

Yasuhiro Yamamoto, Hirohito Funato, and Satoshi Ogasawara. 2008. Hybrid Sensor-less Control of Permanent Magnet Synchronous Motor in Low-speed Region. Journal of Power Electronics, 8, 4, (2008), 301-308. DOI: 10.6113/JPE.2008.8.4.301.