A new PMSM speed modulation system with sliding mode based on active-disturbance-rejection control

Abstract

A sliding mode and active disturbance rejection control (SM-ADRC) was employed to regulate the speed of a permanent magnet synchronous motor (PMSM).The major advantages of the proposed control scheme are that it can maintain the original features of ADRC and make the parameters of ADRC transition smoothly. The proposed control scheme also ensures speed control accuracy and improves the robustness and anti-load disturbance ability of the system. Moreover, through the analysis of a d-axis current output equation, a novel current-loop SM-ADRC is presented to improve the system’s dynamic performance and inner ability of anti-load disturbance. Results of a simulation and experiments show that the improved sliding-mode ADRC system has the advantages of fast response, small overshoot, small steady-state error, wide speed range and high control accuracy. It shows that the system has strong anti-interference ability to reduce the influence of variations in rotational inertia, load and internal parameters.

Keywords

disturbance rejection / auto tuning / permanent magnet synchronous motor / speed modulation system

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