Description
异步电动机电源电压下降,若负载转矩不变,则定子电流必然增大.
如果电动机拖动的负载较小,除起动转矩有所降低外,不会影响电动机的寿命.
但如果电动机满载运行,由于电源电压低于额定电压;会使电动机电流超过额定值,影响电动机的寿命.
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