永磁同步电机低速无传感器控制及位置估计误差补偿

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Abstract A novel sensorless control method of surface-mounted permanent magnet synchronous motor (SPMSM) at low speed and a scheme of estimated position error compensation are presented in this paper. On one hand, the position and speed estimation system is designed and a form of modulation signal is proposed, which can realize any arbitrary initial rotor position detection at zero speed and steady operation at low speed. On the other hand, for the reason that the increment of error between the estimated position and the real one emerges with the speed increased, leading to uncertainty operation of system, a scheme of estimated position error compensation considering the fundamental frequency back-EMF and cross coupling terms is proposed. Precisely rotor position tracking can be achieved with the scheme. The sensorless method and compensation scheme are validated by simulation and experiment. The results show that the proposed method can well realize sensorless control of SPMSM at low (and zero) speed, and resolve the problem of the position error increment with speed, providing theoretical and experimental basis of application at wide speed range.

Key words： SPMSM sensorless control high-frequency signal injection estimated position error compensation

Received: 30 August 2011 Published: 20 March 2014

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TM351

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	Liu Ying
	Zhou Bo
	Feng Ying
	Zhao Chengliang

Cite this article:

Liu Ying,Zhou Bo,Feng Ying等. A Novel Sensorless Control Method of SPMSM at Low Speed and Estimated Rotor Position Error Compensation[J]. Transactions of China Electrotechnical Society, 2012, 27(11): 38-45.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I11/38

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