A new adaptive flux weakening method of PMSM

In this paper, an adaptive flux weakening method for PMSM is proposed. The demagnetization current can be obtained by an adaptive PI regulator according to the reference voltage output by the current loop controller and the voltage limitation of the inverter. This method can reduce the dependency on motor parameters and improve the robust and precision of flux weakening control. To avoid the damage on rotor permanent magnet by the flux-weakening current, a rotor flux observer based on extended Kalman filter is proposed to realize the real-time flux monitoring. Some simulation and experiments are implemented to verify the performance of the proposed method.