一、換向器怎么測量好壞

換向器，亦稱“整流子”。直流電機和交流換向器電動機電樞上的一個重要部件。那么換向器怎么測量好壞呢？

1、換向器片間電阻測量

測量換(huan)向器(qi)片(pian)間(jian)電(dian)(dian)阻(zu)(zu)，能發現電(dian)(dian)樞繞(rao)組是(shi)否斷(duan)線、開焊和(he)匝(za)間(jian)短路，升高片(pian)是(shi)否斷(duan)裂以及是(shi)否存(cun)在換(huan)向器(qi)片(pian)間(jian)短路，片(pian)間(jian)電(dian)(dian)阻(zu)(zu)檢(jian)查通常采用降(jiang)壓法，也可采用專用片(pian)間(jian)電(dian)(dian)阻(zu)(zu)測量儀。

2、換向器擺渡測量

當換向(xiang)(xiang)器(qi)變形或偏心時(shi)，在運行時(shi)將(jiang)會使電(dian)(dian)(dian)刷(shua)跳動，滑(hua)動接(jie)觸都不(bu)理想，超過一定數值后，將(jiang)導致換向(xiang)(xiang)器(qi)惡化。高(gao)速電(dian)(dian)(dian)機(ji)和多種路電(dian)(dian)(dian)樞繞(rao)組電(dian)(dian)(dian)機(ji)更為敏(min)感(gan)。

二、換向器磨損到什么程度不能用

換向器在使用(yong)過(guo)程中，磨損(sun)是避免不(bu)了(le)的(de)，那(nei)么換向器磨損(sun)到什(shen)么程度不(bu)能(neng)用(yong)呢？

換向(xiang)(xiang)器(qi)(qi)磨損(sun)到相距(ju)引線4~5mm時不(bu)(bu)能(neng)用，換向(xiang)(xiang)器(qi)(qi)表(biao)面深(shen)度(du)大(da)于0.5mm時應(ying)更(geng)(geng)換。對于正常用到的電(dian)(dian)(dian)機(ji)，不(bu)(bu)管其(qi)磨損(sun)程度(du)如何，均應(ying)定期（一般兩年）更(geng)(geng)換電(dian)(dian)(dian)刷和換向(xiang)(xiang)器(qi)(qi)。無論是(shi)有刷電(dian)(dian)(dian)動車電(dian)(dian)(dian)機(ji)還是(shi)無刷電(dian)(dian)(dian)動車電(dian)(dian)(dian)機(ji)，其(qi)輸入(ru)電(dian)(dian)(dian)流過大(da)都(dou)市影響使用性能(neng)。

電機的電壓是通(tong)過控(kong)制(zhi)器(qi)供(gong)給的。控(kong)制(zhi)器(qi)內的電子組件(jian)老化會導致輸入電機的電流(liu)變大。因(yin)此須要(yao)對(dui)控(kong)制(zhi)器(qi)展開檢查，必要(yao)時更換(huan)控(kong)制(zhi)器(qi)。定期對(dui)電動車(che)電機齒(chi)輪、滾(gun)珠軸(zhou)承(cheng)以(yi)及減速零(ling)部件(jian)展開潤滑(hua)，若齒(chi)輪及滾(gun)珠軸(zhou)承(cheng)內外(wai)套磨(mo)損過大、防振片變形(xing)、彈簧性(xing)能下滑(hua)或折(zhe)斷均應更換(huan)控(kong)制(zhi)器(qi)。