當向三相定子繞組中通入對稱的三相交流電時，就產生了一個以同步轉速n1沿定子和轉子內圓空間作順時針方向旋轉的旋轉磁場。由于旋轉磁場以n1轉速旋轉，轉子導體開始時是靜止的，故轉子導體將切割定子旋轉磁場而產生感應電動勢。由于轉子導體兩端被短路環短接，在感應電動勢的作用下，轉子導體中將產生與感應電動勢方向基本一致的感生電流。轉子的載流導體在定子磁場中受到電磁力的作用。電磁力對轉子軸產生電磁轉矩，驅動轉子沿著旋轉磁場方向旋轉。
   當電(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)的三相(xiang)定子繞組，通入(ru)三相(xiang)對(dui)稱交(jiao)流電(dian)(dian)(dian)(dian)后(hou)，將產生一個旋轉(zhuan)(zhuan)(zhuan)磁(ci)(ci)場(chang)(chang)，該旋轉(zhuan)(zhuan)(zhuan)磁(ci)(ci)場(chang)(chang)切割轉(zhuan)(zhuan)(zhuan)子繞組，從而(er)在轉(zhuan)(zhuan)(zhuan)子繞組中產生感應電(dian)(dian)(dian)(dian)流，載流的轉(zhuan)(zhuan)(zhuan)子導(dao)體(ti)在定子旋轉(zhuan)(zhuan)(zhuan)磁(ci)(ci)場(chang)(chang)作(zuo)用(yong)下將產生電(dian)(dian)(dian)(dian)磁(ci)(ci)力，從而(er)在電(dian)(dian)(dian)(dian)機(ji)(ji)轉(zhuan)(zhuan)(zhuan)軸(zhou)上(shang)形成電(dian)(dian)(dian)(dian)磁(ci)(ci)轉(zhuan)(zhuan)(zhuan)矩(ju)，驅動(dong)電(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)旋轉(zhuan)(zhuan)(zhuan)，并(bing)且電(dian)(dian)(dian)(dian)機(ji)(ji)旋轉(zhuan)(zhuan)(zhuan)方向(xiang)與旋轉(zhuan)(zhuan)(zhuan)磁(ci)(ci)場(chang)(chang)方向(xiang)相(xiang)同。