Abstract：Sensorless control of permanent magnet synchronous motor (PMSM) is usually based on high frequency signal injection at low speed or zero speed. The rotation high frequency injection method identifies the rotor position, but its accuracy is easily affected by the controller sampling and calculation delay, the inverter output and waveform distortion delay, and the delay of the filter during the signal demodulation. On the basis of theoretical deduction and analysis of rotor position deviation, this paper proposes that the phase deviations produced by signal delay can be divided into two types for analysis and compensation. Subsequently, a control strategy for rotating high frequency signal injection is proposed. This strategy can effectively reduce the phase deviation caused by signal delay and improve the accuracy of rotor position estimation. The delay caused by rotor position deviation is changing with time, and the proposed strategy has the characteristics of on-line computation and real-time compensation. Therefore, the on-line detection accuracy of rotor position can be improved. Experiments verify the correctness of the theoretical analysis and the effectiveness of the strategy.
郭磊, 杨中平, 林飞. 带误差补偿的高频信号注入永磁同步电机无传感器控制策略[J]. 电工技术学报, 2019, 34(21): 4458-4466.
Guo Lei, Yang Zhongpin, Lin Fei. A Sensorless Control Strategy for High Frequency Signal Injection Permanent Magnet Synchronous Motor with Error Compensation. Transactions of China Electrotechnical Society, 2019, 34(21): 4458-4466.
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2019, Vol. 34 
