直流电机维修在逐步(bu)加快推(tui)进(jin)以(yi)国(guo)内市场(chang)为主(zhu)，向国(guo)内、国(guo)际(ji)同步(bu)发展的(de)转型，加快推(tui)进(jin)由制造商向成(cheng)套供货商、系统服务商转型。

必需要不停地学(xue)习，伺(si)服电(dian)(dian)(dian)机的(de)维(wei)(wei)修中。用(yong)一个个方法(fa)去(qu)总结(jie)。伺(si)服电(dian)(dian)(dian)机维(wei)(wei)修为大家简析怎样去(qu)改变直流电(dian)(dian)(dian)机的(de)转(zhuan)(zhuan)速(su)(su)。直流电(dian)(dian)(dian)机转(zhuan)(zhuan)速(su)(su)的(de)控制(zhi)方法(fa)调(diao)(diao)节电(dian)(dian)(dian)枢电(dian)(dian)(dian)压。改变电(dian)(dian)(dian)枢电(dian)(dian)(dian)压从而改变转(zhuan)(zhuan)速(su)(su)，属(shu)恒转(zhuan)(zhuan)矩调(diao)(diao)速(su)(su)方法(fa)，动态响(xiang)应快，适用(yong)于(yu)要求大范围无级(ji)平滑(hua)调(diao)(diao)速(su)(su)的(de)系统。

使电(dian)(dian)(dian)动机从额定转速(su)(su)(su)向上变速(su)(su)(su)，改变电(dian)(dian)(dian)机主磁通中只能减弱磁通。属恒(heng)功率调(diao)速(su)(su)(su)方法，动态响应较慢，虽能无(wu)级(ji)平(ping)滑调(diao)速(su)(su)(su)，但调(diao)速(su)(su)(su)范(fan)围小。只能有级(ji)调(diao)速(su)(su)(su)，改变电(dian)(dian)(dian)枢电(dian)(dian)(dian)路电(dian)(dian)(dian)阻R电(dian)(dian)(dian)动机电(dian)(dian)(dian)枢外串电(dian)(dian)(dian)阻进行调(diao)速(su)(su)(su)。平(ping)滑性差、机械特(te)性软、效率低。

直流电机维修不同的(de)转(zhuan)速详细表达了具体工(gong)作(zuo)特点，因此掌(zhang)握(wo)改变直流(liu)电机转(zhuan)速的(de)方法是非(fei)常重要的(de)。