Double closed loop control for BLDC based on whole fuzzy controllers

Abstract

This paper focuse on the design and implementation of speed-current double closed loop for permanent magnet brushless DC motor(BLDC). In analyzing the characteristics of the fuzzy controller, The new form of whole fuzzy controllers are proposed. Speed loop worked with a fuzzy adaptive PID controller is the main loop of the system. As the current loop is inner loop which is a servo system, The fuzzy control method with intelligent weight function is designed to control current loop. The whole fuzzy controllers are compared with traditional PID by simulation through MATLAB. The consequence of simulation indicates that compared with the traditional PID control, the method modifies the dynamic performance and robustness of BLDC system.