三相异步电动机相间功率不对称现象分析及保护电路设计

Analysis of asymmetric running and its protection circuit for triphase asynchronous motor

通过对三相异步电动机空载实验中遇见的故障——三相相间功率的极大不对称性进行分析。设计了电动机在功率极大不对称运行时的保护电路,同时该保护电路对缺相运行也能起到保护作用,从而确保了三相异步电动机的安全运行。

Through analyzing the asymmetry about the power among three phase of the no-load experiments of the triphase asynchronous motor is designed. The protection circuit when the power is operated greatly and asymmetrically of motor, thus keep the safe operation of triphase asynchronous motors.