电动势换向无刷直流电机的预定位方式起动

The Start Method by Means of Rotor Pre-setting for the Brushless DC Motor of Electro-motive Force Commutation

从理论上分析了电动势换向无刷直流电动机预定位方式起动过程，并用具体电路予以实现。实验证明。

The start method by means of rotor pre-setting for the brushless DC motor of electro-motive force(EMF) commutation was analyzed in this paper and the control dircuit was designed.The experiment shows that the start method by means of rotor pre-setting can start the brushless DC motor of EMF commutation reliably.