2018 Volume 15 Issue 6 Pages 20171270
In this paper, a permanent magnet synchronous motor controller that improves the robustness to parameter perturbations and load disturbances is proposed for electric drive applications. The speed loop uses global integral sliding mode control strategy, chooses an appropriate global integral sliding surface, maintains a continuous control law, realizes the sliding mode motion throughout the entire motion of the system through a dynamic nonlinear sliding surface, effectively weakens the chattering inherent in the sliding mode control system, and significantly improves the dynamic quality. The load torque sliding mode observer is used to realize the feed-forward compensation of the load torque, the influence on the performance of control system caused by load torque disturbance can be inhibited. The proposed controller is found to be more effective than the conventional controller, as demonstrated through simulations and experiments.
