A sensorless control of surface-mount permanent magnet synchronous motor based on rotor flux estimation

This paper proposes a sensorless field-oriented control(FOC) strategy for Surface-mount Permanent Magnet Synchronous Motor(SPMSM). Firstly, a rotor flux estimation method with a high pass filter is introduced. Secondly, the basic principle of PLL and PI parameters tuning method derivation are demonstrated. And then, the compensation method for the phase shift caused by the high pass filter has been revealed. Finally, simulations and experiments verify the correctness and validity of the proposed method.