PMSM speed controller using switching algorithm of PD and Sliding mode control

This paper proposes a realization of robust speed control for permanent magnet synchronous motor by using PD-Sliding mode hybrid control. The PD control has a good performance in the transient period while the sliding mode control has robustness against the system uncertainties. The proposed control method is proposed for the control of permanent magnet synchronous motor by taking advantages of both the PD and sliding mode controls. And the chattering problem of Sliding mode control is eliminated to apply the sigmoid function under the control of a switching function. The stability of the sliding mode control is verified by the Lyapunov function with the setting up of variable gains. The simple switching algorithm used for stability of hybrid control system. The embodiment of speed controllers has evaluated through experiments with 2KW SAMSUNG ROCKWELL PMSM. The PD-sliding mode algorithm which is shows a good performance in the transient period and robustness against disturbances. Robustness of the PD-sliding mode algorithm can be further checked with various external disturbances.