Research on PMSM control of sliding mode-PI hybrid control and decoupling compensation.

Traditional sliding mode control tends to generate big jitters and large control gains. In this paper, a sliding mode PI hybrid control strategy based on a new reaching law is proposed. Based on the traditional exponential reaching law, a hybrid control strategy based on a new reaching law to address the system jiUers is designed. As the motor starts, it works together with PI regulator to reduce the starting current. Since the salient pole effect and model error affect the performance of three-phase permanent magnet synchronous motor, the decoupled current PI control strategy is proposed. The feedforward decoupling compensation is introduced in the current loop, and the parameters of the current loop are adjusted by internal model control to improve the robustness and decoupling performance of the control system. The results of the simulation and experiment show the proposed control strategy improves the control precision and stability. [ABSTRACT FROM AUTHOR]