电机出厂试验停电后低频噪声现象分析

Analysis on Occurrence of Low Frequency Noise from Electric Motor Being Passed through Final Test and Turned-off

简述电机出厂试验结束后,有少许电机在停机后发生间断性的低频噪声,有时甚为严重,通过试验分析了低频噪声的来源并提出控制方法。

After motors are passed through the final test and turned-off, the discontinuous low-frequency noise occurs in some electric motors, sometimes, the noise becomes very serious. The source of the low-frequency noise is analyzed as well as its control is presented.