Due to the problems of easy overshoot, poor robustness and difficult parameter tuning in the SVM-DTC speed control system of PMSM, the super-twisting sliding mode active disturbance rejection control (STSM-ADRC) speed controller is proposed. Firstly, in order to reduce the adjustable parameters of ADRC, a second-order linear tracking differentiator is designed. Then, the super-twisting sliding mode algorithm is proposed to replace the nonlinear state error feedback (NLSEF) in the ADRC to further reduce its adjustable parameters and improve its robustness, whilst the stability of the controller is verified. The simulation results verify the effectiveness of the proposed method.

PMSM;Super-Twisting;ADRC;NLSEF