Adaptive robust control for high-speed permanent magnet synchronous motor systems

Abstract

To deal with parametric uncertainty, load disturbance together with other nonlinear factors in highspeed permanent magnet synchronous motor (PMSM) systems, an adaptive robust controller (ARC) is proposed based on direct torque control method. In the high-speed PMSM modeling process, the unknown nonlinear factors, including modeling error and uncertain disturbance, are considered. Based on the optimized motor model, the adaptive robust speed controller is designed. The stability of the closed-loop system is verified by the Lyapunov theory. Simulation results show that the proposed controller provides better performance than the traditional PI controller in terms of stability, adaptability and robustness.