Current Close-loop Research on Permanent Magnet Brushless Motor of Aviation Based on Phase Current

Aiming at high power BLDCM on aviation,combining with the characteristics of air power supply,the current paths of electric operation and dynamic braking of BLDCM were studied.The deficiency of conventional current closed-loop control was revealed.On the base of analysis a new current closed-loop control method based on phase current for electric operation was proposed,input phase current to PI controller which generates PWM signal to reduce its ripple.And phase current restraining method based on negative feedback for dynamic braking were proposed.Finally,The simulation results verify the correctness of theoretical analysis,as well as the effectiveness of the phase current detection and control methods the proposed.