An Adaptive Compensation Strategy for Sensorless Control of PMSM Based on the Rotational High Frequency Signal Injection Scheme

In order to reduce the estimated rotor position error results for the high-resistance permanent magnet synchronous motor (PMSM), an adaptive compensation strategy for sensorless control based on the rotating high-frequency signal injection (HFSI) method is proposed. The parameter identification is accomplished through the heterodyne demodulation method, which relies on the impedance angle of the motor obtained in the standstill status. In the motor startup process, the rotor position estimation error is compensated based on the identified parameters to achieve adaptive compensation, and the applicability of the proposed method is analyzed. Finally, the effectiveness of the proposed method is verified by simulation results.