Terminal Sliding Mode Control of Permanent Magnet Synchronous Motor Based on A Novel Adaptive Reaching Law

A novel adaptive terminal sliding mode control (NATSMC) method is proposed to improve the speed control performance of permanent magnet synchronous motor (PMSM) under external disturbance. Firstly, a novel adaptive terminal sliding mode reaching law (NATSMRL) algorithm is proposed. The algorithm has the advantages of limited time convergence, high tracking accuracy, and effective chattering suppression. Secondly, a terminal sliding mode controller (TSMC) is designed to estimate the total disturbance of the system, and the estimated disturbance is introduced into the feedforward compensation technology to improve the anti-disturbance ability of the system. Then the Lyapunov function is used to verify the closed-loop stability of the system. Finally, a comprehensive numerical and simulation analysis is carried out. The accuracy and robustness of PMSM are effectively improved compared with PI and TSMC algorithms. This control strategy is feasible and effective.