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电容对马达的作用是什么?
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电容对马达的作用是什么?

2021-07-08

一般马达上常见到使用电容的场合,是单相电机的启动,这种电容也叫启动电容,从电路原理上看,它是起到了移相的作用,因为单相电机只有一组运行绕组,转子是鼠笼式的,单相电无法产生旋转的磁场,需要另外一组启动绕组来配合,因为只有单相220伏交流电,所以在启动绕组上串联了一个电容,电容的特点是电压不能突变,所以会让启动线圈的电流超前于运行线圈90°,这样可以在空间上形成两个旋转的磁场,从而让电机正常启动了。

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