描述

三相異步防爆電機(jī)按其工作原理可以簡(jiǎn)述如下：定子三相電壓U產(chǎn)生定子三相電流I，三相電流通過(guò)定子三相繞組產(chǎn)生磁場(chǎng)&，由于轉(zhuǎn)子與旋轉(zhuǎn)磁場(chǎng)存在相對(duì)運(yùn)動(dòng)，在轉(zhuǎn)子繞組中產(chǎn)生了感應(yīng)電動(dòng)勢(shì)E。由于轉(zhuǎn)子繞組是閉合的，因而產(chǎn)生了感應(yīng)電流I1，I1與旋轉(zhuǎn)磁場(chǎng)相互作用產(chǎn)生了電磁轉(zhuǎn)矩T，從而使轉(zhuǎn)子拖動(dòng)產(chǎn)生機(jī)械以轉(zhuǎn)速n運(yùn)轉(zhuǎn)。由于轉(zhuǎn)子與旋轉(zhuǎn)磁場(chǎng)之間有相對(duì)運(yùn)動(dòng)時(shí)，轉(zhuǎn)子繞組才會(huì)切割磁感線而產(chǎn)生感應(yīng)電動(dòng)勢(shì)和感應(yīng)電流，才能產(chǎn)生電磁轉(zhuǎn)矩，所以轉(zhuǎn)子轉(zhuǎn)速總是小于同步轉(zhuǎn)速的，兩者不可能相同的，因此為三相異步防爆電機(jī)。

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