关键词: 直流无刷电机, 无位置传感器, 反电动势采集, 换相延时

Abstract: Aiming at the problems of non conducting phase voltage acquisition point and delay commutation in the application of traditional six step drive brushless DC motor, the application driving principle is analyzed. From the application direction, the optimization method of controlling non conducting phase voltage acquisition point and the optimization control method of commutation delay after zero crossing event are proposed, which can make the non conducting phase voltage acquisition more accurate, delay commutation time is more accurate. The results show the feasibility and superiority of the optimization method.

Key words: brushlessDCmotor, sensorless, backEMFacquisition, commutationdelay