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電動(dòng)機(jī)的輸入功率和輸出功率

發(fā)布日期:2022-04-18 點(diǎn)擊率:1253

    電動(dòng)機(jī)從電源吸取的有功功率,稱為電動(dòng)機(jī)的輸入功率,一般用P1表示。電動(dòng)機(jī)轉(zhuǎn)軸上輸出的機(jī)械功率,稱為輸出功率,一般用P2表示。在額定負(fù)載下,P2就是額定功率PN。

    電動(dòng)機(jī)運(yùn)行時(shí),內(nèi)部總有一定的功率損耗,這些損耗包括:繞組的銅(或鋁)損耗、鐵心上的鐵損耗以及各種機(jī)械損耗等。因此,輸入功率等于損耗功率和輸出功率之和,亦即輸出功率總是小于輸入功率。

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