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电气过载为什么电流会过大

更新时间: 2020-09-28 00:00:00     

电气过载电流过大的原因:

1、过载时负载转矩增加,电机减速,转子和旋转磁场之间的相对速度增加,切割磁力线速度增加,感应电势增加,电流会增大;

2、另外,过载时电机温升较额定负载时高,相应的线圈因温度变高阻值变大,阻值变大后电流随之也加大。

关键词: 电气 过载 为什么 电流

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