事實上，電機故障并不是電機本身的原因。主要是變頻器調試不規范或使用變頻電機時使用非變頻電機造成的。主要情況如下：

　　變頻器維(wei)護：變頻器導致(zhi)電機燒毀的原因是什(shen)么?

　　1、變頻電機采用普(pu)通電機。

　　由于普(pu)通(tong)電(dian)機(ji)的冷卻風扇與轉(zhuan)軸(zhou)相連，當用變頻器(qi)調速(su)(su)時，轉(zhuan)速(su)(su)不穩定，達不到電(dian)機(ji)的額定轉(zhuan)速(su)(su)，冷卻風扇不能發揮正常作用，導致(zhi)電(dian)機(ji)冷卻不良;此外(wai)，普(pu)通(tong)電(dian)機(ji)未按變頻要求設計，導致(zhi)電(dian)機(ji)發熱或燃燒。

　　2、變頻電機未經調試直接(jie)與變頻器(qi)連(lian)接(jie)。

　　變(bian)(bian)頻器(qi)通(tong)過兩種(zhong)方式(shi)控(kong)(kong)(kong)制(zhi)電(dian)(dian)(dian)機(ji)(ji)(ji)Z：矢量(liang)控(kong)(kong)(kong)制(zhi)和(he)v/f曲線控(kong)(kong)(kong)制(zhi)。每個控(kong)(kong)(kong)制(zhi)模式(shi)應 控(kong)(kong)(kong)制(zhi)電(dian)(dian)(dian)機(ji)(ji)(ji)類型(同步、異步、帶或不(bu)帶編碼器(qi))。電(dian)(dian)(dian)機(ji)(ji)(ji)額定(ding)功率(lv)(lv)。額定(ding)電(dian)(dian)(dian)壓(ya)。額定(ding)電(dian)(dian)(dian)流(liu)。速度或極數。額定(ding)頻率(lv)(lv)。Z高工作頻率(lv)(lv)。電(dian)(dian)(dian)機(ji)(ji)(ji)啟(qi)動和(he)停止的加速和(he)減速時間。變(bian)(bian)頻器(qi)控(kong)(kong)(kong)制(zhi)電(dian)(dian)(dian)機(ji)(ji)(ji)的保護(hu)方式(shi)和(he)保護(hu)比(bi)例(li)系數。荷載(zai)波頻率(lv)(lv)至關重(zhong)要。設置這些參數后(hou)，選擇是使用(yong)矢量(liang)控(kong)(kong)(kong)制(zhi)還(huan)是v/f控(kong)(kong)(kong)制(zhi)。選擇矢量(liang)控(kong)(kong)(kong)制(zhi)時，電(dian)(dian)(dian)機(ji)(ji)(ji)應具有(you)空載(zai)和(he)變(bian)(bian)頻器(qi)匹配(pei)的動態(tai)自學(xue)習(xi)或負載(zai)靜態(tai)自學(xue)習(xi)。自學(xue)習(xi)后(hou)，電(dian)(dian)(dian)機(ji)(ji)(ji)與變(bian)(bian)頻器(qi)配(pei)合，充分發(fa)揮矢量(liang)控(kong)(kong)(kong)制(zhi)的精(jing)度;選擇v/f控(kong)(kong)(kong)件(jian)時，不(bu)需要自學(xue)習(xi)。參數調整后(hou)，可直接(jie)通(tong)電(dian)(dian)(dian)。

　　3、變頻電機(ji)風機(ji)運行方向(xiang)與風機(ji)上標明的旋轉方向(xiang)不一致。

　　風扇無(wu)法(fa)工作，導致(zhi)電機散熱不良，電機產(chan)生的熱量無(wu)法(fa)散發，導致(zhi)電機發熱或(huo)燃燒。

　　4、以上三種情況中，2例(li)和3例(li)發生(sheng)率Z高(gao)。