The Research On Control Method Of BLDCM Based On Fuzzy Control

With the rapid development of modern digital signal processor, modern power electronics technology and control technology, and as the brushless direct current motor has great advantages, such as small size, wide speed range, simple control circuit and high efficiency, it has been widely used in the industrial production and home electric fields. Thus, people have a higher requirement for motor control. At present, there is a development trend that the motor controller takes the modern digital signal processor as the control core and uses the modern strategies to get higher control accuracy and control performance.For not only the problem that the brushless direct current motor control system is a complex system with multi-variable, time-variability and non-linear, but also the shortcomings of simple PID control performance. The essay proposes an improved program that fuzzy-PID control method is used for the speed loop of the brushless direct current motor control system. Build the simulation model in Matlab/Simulink. By simulation results, standard fuzzy-PID control used in the speed loop can reduce regulation time, reduce start-up speed overshoot and improve the system’s anti-interference ability.Motor control system using standard fuzzy-PID control which has the shortcomings that large amount of calculation and commutation torque ripple. The paper proposes a modified fuzzy control method that fuzzy PD+fuzzy ID controller replaces the standard fuzzy PID controller. The simulation results show that Fuzzy PD+fuzzy ID control has obvious advantages in the anti-load disturbance, reducing start-up speed overshoot and suppressing torque steady-state error, basically satisfying the high performance requirement of brushless direct current motor, which provide a strong theoretical basis for the practical application.