河(he)源電磁鐵失磁的(de)原(yuan)因(yin)
致使(shi)失磁(ci)(ci)(ci)(ci)的因素有:轉(zhuan)子繞組(zu)(zu)故(gu)障、勵(li)磁(ci)(ci)(ci)(ci)機(ji)(ji)故(gu)障、主動滅磁(ci)(ci)(ci)(ci)開關誤跳、半導體(ti)(ti)勵(li)磁(ci)(ci)(ci)(ci)體(ti)(ti)系(xi)中(zhong)某(mou)些元件損壞或回路發(fa)作(zuo)故(gu)障以及誤操作(zuo)等(deng)。河源電(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)鐵失磁(ci)(ci)(ci)(ci)的損害(hai)首要體(ti)(ti)現在對發(fa)電(dian)(dian)(dian)機(ji)(ji)自身(shen)和對電(dian)(dian)(dian)力(li)體(ti)(ti)系(xi)的損害(hai)!對發(fa)電(dian)(dian)(dian)機(ji)(ji)自身(shen)的損害(hai):(1)發(fa)電(dian)(dian)(dian)機(ji)(ji)失磁(ci)(ci)(ci)(ci)后(hou),定子端部漏磁(ci)(ci)(ci)(ci)增強,使(shi)端部的部件和端部鐵芯(xin)過熱(re)。(2)異步運轉(zhuan)后(hou),發(fa)電(dian)(dian)(dian)機(ji)(ji)的等(deng)效(xiao)電(dian)(dian)(dian)抗降(jiang)低(di),由變為(wei)。因此從體(ti)(ti)系(xi)中(zhong)吸收的無功(gong)添加,使(shi)定子繞組(zu)(zu)過熱(re)。(3)發(fa)電(dian)(dian)(dian)機(ji)(ji)轉(zhuan)子繞組(zu)(zu)呈(cheng)現的差頻電(dian)(dian)(dian)流在轉(zhuan)子繞組(zu)(zu)中(zhong)