单相永磁无刷直流电机的转矩分析及其波动的抑制

Research on the Single-phase Permanent Magnet DC Motor's Torque and the Restraint on Its Ripple

本文从单相永磁无刷直流电动机内部结构的选择以及电机外部驱动模式的选择两个方面可能对电动机转矩波动产生的影响进行了详细的定性分析,得出了将渐变气隙结构与有效转角电压PWM驱动模式相结合能够有效地抑制单相永磁无刷直流电动机的转矩波动这一重要结论.

Detailed qualitative analysis was made in the paper on the effects of the choice of single phase per- manent magnet brushless DC motor＇ s inner structural forms and its outer driving methods on torque ripples.An important conclusion has been made that the connection of tapered air-gap struc- ture and the valid rotation degree driving voltage＇s PWM method can effectively reduce the torque ripples of the motor.