PMSM Sliding Mode Control Based on a Reaching law

The speed loop of the AC servo system used to apply PI control method, it makes the system vulnerable to the volatile motor parameters and load disturbances. Sliding mode control(SMC) has successfully overcome the above-mentioned defects of PI control method and is expected to be widely used in high-performance servo systems. The id=0 control method is adopted in this paper and a reaching law sliding mode controller is designed on this basis. Then the PI control method frequently applied in speed loop is replaced by this SMC controller and the feasibility and superiority are tested through simulation results in the end. Keywords-permanent magnet sychronous motor(PMSM); vector control; sliding mode control(SMC); reaching law