Abstract：In this paper, the pulsating high frequency current injection method is analyzed, where high frequency current signal is only injected into the d axis of the estimated rotor coordinate. By detecting the amplitude of the high frequency voltage, the rotor position error signal are obtained and processed to extract the information of the rotor position. Firstly, the estimating error of the rotor position is analyzed on the level of the theory and then, its mathematical expression is further deduced in this paper. Moreover, to reduce the influence of the rotor position observer and current loop PI regulator on the estimating error of the rotor position, the rotor error compensation strategy is proposed. After the simulation of system based on Matlab/Simulink, the analysis result demonstrates that the effectiveness of the improved current regulator and extracting processing of the rotor position signal, and the estimating accuracy of the rotor position is enhanced. The estimations of the position and speed of the rotor are achieved in spite of great changes in system parameters. This study method improves the accuracy and stability of the sensorless control of PMSM.
张志锋, 刘晓东. 基于高频信号注入的永磁同步电动机的无传感器控制及位置估计误差补偿[J]. 电气技术, 2017, 18(5): 12-18.
Zhang Zhifeng, Liu Xiaodong. Sensorless Control of Permanent Magnet Synchronous Motor based on High Frequency Signal Injection and Estimated Rotor Position Error Compensation. Electrical Engineering, 2017, 18(5): 12-18.
2017, Vol. 18 
