Load Disturbance Observer-Based Complementary Sliding Mode Control for PMSM of the Mine Traction Electric Locomotive

Abstract

For the permanent magnet synchronous motor (PMSM) control system of the mine traction electric locomotive (MTEL), the fluctuation of the load will lead to the resonance of the velocity of the MTEL and result in mechanical damage. To solve this problem, a disturbance observer-based complementary sliding mode controller (DOB-CSMC) design method is proposed in this paper. A mathematical model of PMSM is first established. Then, a disturbance observer is designed to reconstruct the load disturbances. In order to realize the static and dynamic tracking performance of the PMSM system, a saturation function-based complementary sliding mode controller is designed and the reconstructed disturbance is introduced into the controller to counteract the influence of external disturbance. Finally, the simulation and experimental results show that the DOB-CSMC method has a smaller overshoot and a shorter settling time compared with the traditional SMC method.