CPG三相(xiang)電(dian)機(ji)(ji)內(nei)部線(xian)(xian)圈的(de)許多驅(qu)動原理與單(dan)相(xiang)完全相(xiang)同。的(de)區別是(shi)，在三相(xiang)中(zhong)，當每(mei)條線(xian)(xian)達到全電(dian)壓(ya)時，線(xian)(xian)圈的(de)磁極以(yi)1/3的(de)增量圍繞(rao)轉子前進。這意味著，根據(ju)被磁化的(de)線(xian)(xian)圈的(de)順序(xu)，旋轉方向將不(bu)再像單(dan)相(xiang)電(dian)機(ji)(ji)那樣(yang)是(shi)隨機(ji)(ji)的(de)，而是(shi)完全可預測和一(yi)致的(de)。不(bu)再需要(yao)帶有電(dian)容器(qi)的(de)啟動電(dian)路，因為電(dian)機(ji)(ji)非常自然地驅(qu)動。

這(zhe)種電(dian)(dian)(dian)機(ji)的(de)(de)主(zhu)要(yao)優(you)點是(shi)在(zai)大功率應用中。首先，電(dian)(dian)(dian)源和導體通(tong)常能夠提供比住宅用戶的(de)(de)電(dian)(dian)(dian)流，并且三(san)條線路中的(de)(de)每(mei)一條單獨(du)承載的(de)(de)電(dian)(dian)(dian)流都比整個電(dian)(dian)(dian)流通(tong)過一個電(dian)(dian)(dian)路時要(yao)少。這(zhe)使得電(dian)(dian)(dian)機(ji)在(zai)功率的(de)(de)應用中很有吸引(yin)力。在(zai)大多(duo)數三(san)相電(dian)(dian)(dian)機(ji)的(de)(de)情況下，電(dian)(dian)(dian)工可(ke)以配(pei)置高壓(ya)(ya)或低(di)壓(ya)(ya)接線。如果提供電(dian)(dian)(dian)壓(ya)(ya)的(de)(de)電(dian)(dian)(dian)源，這(zhe)可(ke)以降低(di)電(dian)(dian)(dian)流消耗。