Fuzzy PID control based on variable universe for PMSM

Abstract This paper aims to design a speed controller for PMSM so that the motor can track the given speed signal. Based on vector control strategy, united with SVPWM (Space Vector Pulse Width Modulation) technology, an on-off of inverter switches was regularly controlled to form the vector voltage to drive PMSM. Finally, the PMSM double closed-loop vector control system was built. Specifically, by the design of the speed controller method, a fuzzy PID control, according to the variable universe, was proposed to realize the high precision control requirements of the PMSM speed control system. Firstly, on the ground of the traditional PID controller, a fuzzy controller was introduced to realize the self-tuning of control parameters, and then a new function variable domain module was built to reach the self-adjustment of the fuzzy controller domain and to achieve self-tuning of control rules, improving control accuracy and response speed.