1.故障原因
(1)修復(fù)時(shí),定子繞組匝數(shù)減少過多;
(2)電源電壓過高;
(3)Y接電動(dòng)機(jī)誤接為Δ;
(4)電機(jī)裝配中,轉(zhuǎn)子裝反,使定子鐵芯未對(duì)齊,有效長度減短;
(5)氣隙過大或不均勻;
(6)大修拆除舊繞組時(shí),使用熱拆法不當(dāng),使鐵芯燒損
2.故障排除
(1)重繞定子繞組,恢復(fù)正確匝數(shù);
(2)設(shè)法恢復(fù)額定電壓;
(3)改接為Y;
(4)重新裝配;
(5)更換新轉(zhuǎn)子或調(diào)整氣隙;
(6)檢修鐵芯或重新計(jì)算繞組,適當(dāng)增加匝數(shù)
(轉(zhuǎn)載)