Speed Control for Permanent Magnet Synchronous Motor Based on Terminal Sliding Mode High-order Control

This paper proposes a novel approach to improve the traditional speed controller of the field-oriented control (FOC) strategy for permanent magnet synchronous motor (PMSM) drives. The performance and robustness of the speed controller for PMSM drives are limited when using the traditional proportional-integral (PI) method. The proposed approach is the terminal sliding mode high-order control (TSMHC), designed to ensure fast and accurate tracking for PMSM drives. The TSMHC approach integrates the advantages of terminal sliding mode (TSM) and high-order control law. TSM brings faster tracking with smaller steady-state errors, while high-order control law can reduce the reaching time between the initial system state and the sliding-mode surface with slight chattering. The stability of the TSMHC is evaluated using the Lyapunov stability theory. The simulation results validate the efficiency and superiority of the proposed TSMHC approach.