Abstract
As the character of brushless DC motor (BLDCM) is nonlinear, the classical control method can not obtain satisfied performance, so the fuzzy control is used to control BLDCM, but the conventional fuzzy controller has no integral part, which performance is similar to Proportional Derivative(PD) controller, so its static control precision cannot be guaranteed. In this paper, a fuzzy Proportional Integral and Derivative(PID) controller that can ensure static precision is proposed to improve the performance of conventional fuzzy controller and is applied to the speed control of brushless DC motor. The proposed fuzzy-PID method employs fuzzy control when the error is big, employs the PID control when the error is small, so it has both the rapid response of ordinary fuzzy controller and the steady precision of PID controller. The experiment results show the dynamic and static performance of the proposed fuzzy-PID controller are all excellent, the overshoot is zero, the speed respond is fast and the static precision is high, better than the conventional PID controller and the conventional fuzzy controller in speed control.
Published Version
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