Research on Permanent Magnet Synchronous Motor Field Weakening Control Based on Novel Sliding Mode Control Strategy

Permanent magnet synchronous motor (PMSM) has the advantages of strong power density, high efficiency and wide speed range, and has been widely used in many different industrial applications. Aiming at the PMSM speed control system in this paper, a novel sliding mode control strategy and an adaptive exponential approach law are designed, which combine the traditional sliding mode surface with integral commutator to enhance the system’s load resistance interference ability. The simulation results show that the novel sliding mode control strategy has better speed regulation performance when reaching a steady-state than the ordinary sliding mode control strategy, and the novel sliding mode control has smaller speed fluctuations, strong robustness, and effective when the load disturbance is suddenly applied. The chattering phenomenon is suppressed, and the system’s load resistance interference ability is improved.