Global fast terminal sliding mode control strategy for permanent magnet synchronous motor based on load torque Luenberger observer

Abstract

Aiming at the problems of slow response speed and chattering phenomenon in general sliding mode control of permanent magnet synchronous motor, a global fast terminal sliding mode control strategy is proposed to improve the response speed and the anti-interference ability of the system. A load torque Luenberger observer is designed, and the observed value is fed back to the global fast terminal sliding mode controller of permanent magnet synchronous motor control system in order to reduce the influence of external load disturbance. A permanent magnet synchronous motor experiments platform is built to verify the performance of the proposed control strategy and the effectiveness of the observer. The experimental results show that the load torque Luenberger observer can better observe the actual load torque and track the actual speed of the motor. The global fast terminal sliding mode control strategy improves the response speed of the motor and enhances the robustness of the system.