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.
刘颖, 周波, 冯瑛, 赵承亮. 永磁同步电机低速无传感器控制及位置估计误差补偿[J]. 电工技术学报, 2012, 27(11): 38-45.
Liu Ying, Zhou Bo, Feng Ying, Zhao Chengliang. A Novel Sensorless Control Method of SPMSM at Low Speed and Estimated Rotor Position Error Compensation. Transactions of China Electrotechnical Society, 2012, 27(11): 38-45.
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2012, Vol. 27 
