Current Loop Control Strategy of PMSM Based on Fractional Order PID Control Technology

Abstract

High performance permanent magnet synchronous motor(PMSM) servo system needs fast current response, but the uncertainty of the motor, parameter change and load disturbance during the motor operation will affect the performance of PMSM. Therefore, based on fractional order PID control technology, this paper presents the design process and implementation method of the current controller for the high dynamic response requirement of the PMSM current loop, and discusses the parameter sensitivity of the motor. The simulation and experimental results show that the proposed control strategy is correct and effective, which can effectively improve the dynamic performance of the current loop and thus contribute to the overall performance of the servo system.