Abstract:

A closed loop control system is designed to obtain good speed regulating performance of brushless DC motors.The motor speed feedback control offers more stable performance and the controller unit provides the inverter with pulse width modulation signal and the switching order of the switch tube so as to realize frequency control of motor speed control.The model of the system is built and simulated on the Matlab/Simulink platform,and the numerical simulation results show that the proposed control system has good feasibility and effectiveness.

Key words: BLDC motor;frequency control of motor speed;Simulink