Abstract: Aiming at the problem that the speed loop of the permanent magnet synchronous motor vector control system adopts the PI regulator cannot adapt to the change of the motor parameters well, the control effect is not ideal. On the basis of the current predictive control (CPC) heightening the antiinterference ability and improving robustness, a sliding mode control method is proposed. The control method combining sliding mode and current prediction improves the dynamic performance of the permanent magnet synchronous motor vector control system, realizes fast speed regulation response when the load is disturbed and no overshoot control; and improves the system’s tolerance to internal resistance changes. The model of the permanent magnet synchronous motor vector control system is built in Simulink. The simulation results show that under the control of the method in this paper, the response speed and stability of the system are improved, and the time taken for the speed response from starting to stable is reduced by 60%.

Key words: vector control, permanent magnet synchronous motor, sliding mode control, current predictive control