輔助(zhu)電(dian)(dian)(dian)(dian)機(ji) 　電(dian)(dian)(dian)(dian)力機(ji)車上的(de)輔助(zhu)電(dian)(dian)(dian)(dian)機(ji)可用(yong)(yong)(yong)(yong)直流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)動機(ji)，也可用(yong)(yong)(yong)(yong)三(san)(san)相(xiang)交(jiao)(jiao)流(liu)(liu)(liu)異(yi)步(bu)電(dian)(dian)(dian)(dian)動機(ji)。用(yong)(yong)(yong)(yong)直流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)動機(ji)作為(wei)輔助(zhu)電(dian)(dian)(dian)(dian)機(ji)時，須由(you)專(zhuan)用(yong)(yong)(yong)(yong)的(de)硅整流(liu)(liu)(liu)器供電(dian)(dian)(dian)(dian)。用(yong)(yong)(yong)(yong)三(san)(san)相(xiang)交(jiao)(jiao)流(liu)(liu)(liu)異(yi)步(bu)輔助(zhu)電(dian)(dian)(dian)(dian)動機(ji)時，須由(you)靜止(zhi)變相(xiang)、變頻裝(zhuang)置或專(zhuan)用(yong)(yong)(yong)(yong)的(de)旋轉電(dian)(dian)(dian)(dian)機(ji)供給三(san)(san)相(xiang)電(dian)(dian)(dian)(dian)源。這種專(zhuan)用(yong)(yong)(yong)(yong)的(de)旋轉電(dian)(dian)(dian)(dian)機(ji)稱為(wei)劈(pi)相(xiang)機(ji)，可以(yi)把單相(xiang)交(jiao)(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)變為(wei)三(san)(san)相(xiang)交(jiao)(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)。