Speed Control of PMSM by Sliding Mode Control and PI Control

In order to optimize the speed-control performance of the permanent-magnet synchronous motor (PMSM) system with different disturbances and uncertainties, a nonlinear speed-control algorithm for the PMSM servo systems using sliding-mode control and disturbance compensation techniques is developed in this paper. First, a sliding-mode control and PI control method based on one novel which allows chattering reduction on control input while maintaining high tracking performance of the controller. Then, an PI control extended sliding-mode disturbance observer is proposed to estimate lumped uncertainties directly, to compensate strong disturbances and achieve high servo precisions. Simulation results PI control better than the SMC control both show the validity of the proposed control approach.