直流电机维修绕组接处理方法：电机维修绕组接错绕组接错造成不完整的旋转磁场，致使启动困难、三相电流不平衡、噪声大等症状，严重时若不及时处理会烧坏绕组。 滚珠法。 如滚珠沿定子内圆周表面旋转滚动，说明正确，否则绕组有接错现象。 指南针法。如果绕组没有接错，则在一相绕组中，指南针经过相邻的极（相）组时，所指的极性应相反，在三相绕组中相邻的不同相的极（相）组也相反；如极性方向不变时，说明有一极（相）组反接；若指向不定，则相组内有反接的线圈。 万用表电压法。按接线图，如果两次测量电压表均无指示，或一次有读数、一次没有读数，说明绕组有接反处。 常见的还有干电池法、毫安表剩磁法、直流电动机转向法等。

直流电机维修技术：控(kong)制设(she)备的接(jie)(jie)线错误(wu)、过(guo)电(dian)(dian)(dian)(dian)(dian)流(liu)继电(dian)(dian)(dian)(dian)(dian)器(qi)调整的整定值偏小、电(dian)(dian)(dian)(dian)(dian)源未(wei)接(jie)(jie)通，如熔丝烧断(duan)(duan)、开关有(you)故障(zhang)或(huo)触头(tou)接(jie)(jie)触不(bu)良(liang)、引线断(duan)(duan)路等(deng)、电(dian)(dian)(dian)(dian)(dian)源至电(dian)(dian)(dian)(dian)(dian)动(dong)机(ji)(ji)之间的连(lian)接(jie)(jie)有(you)故障(zhang)、直流(liu)电(dian)(dian)(dian)(dian)(dian)动(dong)机(ji)(ji)绕(rao)组有(you)故障(zhang)，如相(xiang)间短路、接(jie)(jie)地(di)、接(jie)(jie)错线、断(duan)(duan)路等(deng)、绕(rao)线式转子异(yi)步电(dian)(dian)(dian)(dian)(dian)动(dong)机(ji)(ji)起(qi)动(dong)误(wu)操作或(huo)起(qi)动(dong)电(dian)(dian)(dian)(dian)(dian)阻过(guo)小、直流(liu)电(dian)(dian)(dian)(dian)(dian)动(dong)机(ji)(ji)轴承(cheng)有(you)故障(zhang)，被卡(ka)住；8）定、转子铁芯相(xiang)擦（扫膛），等(deng)于增加(jia)过(guo)大的负(fu)载、直流(liu)电(dian)(dian)(dian)(dian)(dian)动(dong)机(ji)(ji)负(fu)载过(guo)大或(huo)机(ji)(ji)械转动(dong)部(bu)分被卡(ka)住等(deng)。

直流电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)维修时候需要注意的(de)(de)(de)事项：直流电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)的(de)(de)(de)出(chu)线(xian)(xian)(xian)电(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)承(cheng)(cheng)受(shou)振动，所以(yi)要选用弹性较(jiao)大的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)作电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)引(yin)线(xian)(xian)(xian)，一般电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)引(yin)线(xian)(xian)(xian)在电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)出(chu)线(xian)(xian)(xian)根部(bu)容易振断或磨破损伤，当出(chu)现此(ci)类(lei)故障时要打开电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)，从电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)内部(bu)重(zhong)新接线(xian)(xian)(xian)、直流电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)的(de)(de)(de)轴承(cheng)(cheng)要选用重(zhong)型轴承(cheng)(cheng)，均可承(cheng)(cheng)载(zai)一定(ding)的(de)(de)(de)轴向(xiang)负荷(he)，不论(lun)安(an)装方(fang)向(xiang)如何(he)，轴承(cheng)(cheng)寿(shou)命不受(shou)轴向(xiang)负荷(he)的(de)(de)(de)影响(xiang)。拆卸轴承(cheng)(cheng)时要记录好(hao)偏(pian)(pian)心块(kuai)(kuai)的(de)(de)(de)位置(zhi)及激(ji)振力的(de)(de)(de)百分值，更换完轴承(cheng)(cheng)后检查电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)的(de)(de)(de)转(zhuan)轴应有一定(ding)的(de)(de)(de)轴向(xiang)串动，先不装偏(pian)(pian)心块(kuai)(kuai)空试电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)，运行(xing)正(zheng)常后按原记录复位好(hao)偏(pian)(pian)心块(kuai)(kuai)、偏(pian)(pian)心块(kuai)(kuai)的(de)(de)(de)防护(hu)罩要密(mi)封好(hao)，防止(zhi)粉尘(chen)进入内部(bu)，影响(xiang)电(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)运行(xing)。

直流电机维修绕(rao)组(zu)接(jie)处理方法(fa)：一(yi)个(ge)(ge)线(xian)圈或(huo)线(xian)圈组(zu)接(jie)反，则空(kong)载电(dian)流有较大的(de)不平(ping)衡，应进(jin)厂(chang)(chang)返修(xiu)。引(yin)出线(xian)错(cuo)误(wu)的(de)应正确判断首尾后重新(xin)连接(jie)。减压启动接(jie)错(cuo)的(de)应对照(zhao)接(jie)线(xian)图或(huo)原理图，认(ren)真(zhen)校对重新(xin)接(jie)线(xian)。新(xin)电(dian)机下线(xian)或(huo)重接(jie)新(xin)绕(rao)组(zu)后接(jie)线(xian)错(cuo)误(wu)的(de)，应送厂(chang)(chang)返修(xiu)。定子(zi)绕(rao)组(zu)一(yi)相接(jie)反时(shi)，接(jie)反的(de)一(yi)相电(dian)流特(te)别大，可根据(ju)这个(ge)(ge)特(te)点查找故障并进(jin)行维(wei)修(xiu)。把“Y”型接(jie)成“△”型或(huo)匝数不够，则空(kong)载电(dian)流大，应及(ji)时(shi)更正。