一、電動車電機功率怎么看

1、國家標準規定(ding)電(dian)動車電(dian)機(ji)功率不得大于400W。

2、電機上(shang)一般(ban)不會(hui)寫(xie)功(gong)率，只能看(kan)說明(ming)書或向銷售人(ren)員或廠家咨詢。

3、一般電動(dong)車(che)電機功率有350w、450w、500w、最高的(de)(de)800w，很多64v的(de)(de)電動(dong)車(che)，大部分(fen)是(shi)350w。如果輪胎是(shi)300—10（跟摩托車(che)輪轂(gu)直徑和寬(kuan)度一樣）的(de)(de)話，那個叫電動(dong)摩托車(che)，那就是(shi)500w至800w電機。

二、電動車電機的工作原理

電(dian)(dian)動車(che)電(dian)(dian)機(ji)是(shi)把電(dian)(dian)能轉換成機(ji)械能的一種(zhong)設備。它是(shi)利用(yong)通電(dian)(dian)線圈（也就是(shi)定子繞組）產生旋(xuan)轉磁場并作用(yong)于轉子鼠(shu)籠式(shi)(shi)式(shi)(shi)閉(bi)合鋁(lv)框形(xing)成磁電(dian)(dian)動力旋(xuan)轉扭(niu)矩。

電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)車電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)按(an)使用電(dian)(dian)(dian)(dian)(dian)(dian)源不(bu)同分為直流電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)和交流電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)，電(dian)(dian)(dian)(dian)(dian)(dian)力系統中(zhong)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)大部分是(shi)交流電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)，可以是(shi)同步電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)或(huo)者是(shi)異步電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)（電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)定子磁場(chang)(chang)轉速與(yu)轉子旋轉轉速不(bu)保持同步速）。電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)主(zhu)要由定子與(yu)轉子組成，通電(dian)(dian)(dian)(dian)(dian)(dian)導線(xian)在磁場(chang)(chang)中(zhong)受力運動(dong)(dong)(dong)的(de)方向(xiang)(xiang)(xiang)跟電(dian)(dian)(dian)(dian)(dian)(dian)流方向(xiang)(xiang)(xiang)和磁感(gan)線(xian)（磁場(chang)(chang)方向(xiang)(xiang)(xiang)）方向(xiang)(xiang)(xiang)有關。電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)工作(zuo)(zuo)原理(li)是(shi)磁場(chang)(chang)對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)流受力的(de)作(zuo)(zuo)用，使電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)轉動(dong)(dong)(dong)。

該圖片由注冊用戶"秋天的浮萍"提供，版權聲明反饋

三、電動汽車電機維修教程

在發(fa)動(dong)(dong)(dong)(dong)機一(yi)切正常(chang)的情況(kuang)(kuang)(kuang)下(xia)，啟動(dong)(dong)(dong)(dong)機或蓄電(dian)池(chi)有故障都會使(shi)發(fa)動(dong)(dong)(dong)(dong)機難以啟動(dong)(dong)(dong)(dong)，甚至不能啟動(dong)(dong)(dong)(dong)。遇(yu)此(ci)情況(kuang)(kuang)(kuang)，首先要了解(jie)啟動(dong)(dong)(dong)(dong)機與蓄電(dian)池(chi)的使(shi)用(yong)情況(kuang)(kuang)(kuang)，以便大致判斷故障部位。若蓄電(dian)池(chi)使(shi)用(yong)時(shi)間(jian)已經超(chao)過(guo)1年(nian)，應重(zhong)點檢查(cha)其技術狀況(kuang)(kuang)(kuang)；若蓄電(dian)池(chi)使(shi)用(yong)時(shi)間(jian)較(jiao)短，而啟動(dong)(dong)(dong)(dong)機長時(shi)間(jian)未檢修，則應從啟動(dong)(dong)(dong)(dong)機查(cha)起。然(ran)后根據啟動(dong)(dong)(dong)(dong)時(shi)的故障現象進行分(fen)析和處理：

1、啟(qi)動(dong)時(shi)(shi)只聽(ting)到啟(qi)動(dong)機電磁開(kai)關(guan)“咯(ge)咯(ge)”聲，或首(shou)次(ci)啟(qi)動(dong)時(shi)(shi)啟(qi)動(dong)機帶動(dong)曲軸緩轉幾下，繼而(er)出現(xian)啟(qi)動(dong)電磁開(kai)關(guan)“咯(ge)咯(ge)”響，但曲軸卻不轉動(dong)。此現(xian)象一(yi)般屬于蓄電池“斷格”故障。

2、臨時(shi)停車每次都能啟(qi)動(dong)，但停車時(shi)間較長(chang)或第二天啟(qi)動(dong)時(shi)卻只(zhi)能使曲軸轉一下。此現象屬于(yu)蓄電(dian)池(chi)自(zi)放(fang)電(dian)嚴重，其(qi)極(ji)板、隔板嚴重老(lao)化，說明該蓄電(dian)池(chi)已經接近報廢(fei)。

3、啟動(dong)(dong)時啟動(dong)(dong)機突然轉動(dong)(dong)無力，并伴有(you)(you)燒(shao)橡膠(jiao)氣味(wei)或蓄電池(chi)處有(you)(you)煙冒出，多屬極(ji)樁(zhuang)、極(ji)樁(zhuang)夾子接觸不良而發熱燒(shao)損。

4、若啟(qi)動(dong)時啟(qi)動(dong)機驅(qu)(qu)動(dong)齒(chi)(chi)輪(lun)(lun)與發(fa)動(dong)機飛(fei)輪(lun)(lun)齒(chi)(chi)圈(quan)發(fa)出撞擊的(de)空轉聲，其原因(yin)有(you)二：一是飛(fei)輪(lun)(lun)齒(chi)(chi)圈(quan)的(de)嚙合切入(ru)面變形；二是啟(qi)動(dong)機驅(qu)(qu)動(dong)齒(chi)(chi)輪(lun)(lun)與飛(fei)輪(lun)(lun)齒(chi)(chi)圈(quan)的(de)間隙太大。兩者無法嚙合，發(fa)動(dong)機也(ye)就不能啟(qi)動(dong)。

5、電(dian)源(yuan)總開(kai)(kai)關一接(jie)通，啟(qi)動(dong)(dong)機驅(qu)動(dong)(dong)齒(chi)輪(lun)就和飛輪(lun)齒(chi)圈嚙(nie)合(he)在(zai)一起轉動(dong)(dong)。出現這種故(gu)障，一是啟(qi)動(dong)(dong)機電(dian)磁開(kai)(kai)關的(de)保持線圈錯接(jie)在(zai)了電(dian)源(yuan)接(jie)線柱上(shang)；二是鑰(yao)匙(chi)開(kai)(kai)關上(shang)的(de)3根線接(jie)錯，判斷方法是：鑰(yao)匙(chi)在(zai)“0”位(wei)置(zhi)時(shi)啟(qi)動(dong)(dong)機驅(qu)動(dong)(dong)齒(chi)輪(lun)不轉，在(zai)“2”位(wei)置(zhi)時(shi)啟(qi)動(dong)(dong)電(dian)機驅(qu)動(dong)(dong)齒(chi)輪(lun)與飛輪(lun)齒(chi)圈嚙(nie)合(he)一起轉動(dong)(dong)。

6、啟(qi)(qi)動(dong)開(kai)關(guan)(guan)轉(zhuan)到啟(qi)(qi)動(dong)位(wei)置(zhi)發動(dong)機不能啟(qi)(qi)動(dong)，也無(wu)其(qi)他(ta)現象。這(zhe)種故障，一是鑰匙(chi)、開(kai)關(guan)(guan)因(yin)磨(mo)損而未接(jie)通(tong)啟(qi)(qi)動(dong)電(dian)路(lu)；二是啟(qi)(qi)動(dong)機繼電(dian)器未接(jie)通(tong)啟(qi)(qi)動(dong)機電(dian)磁開(kai)關(guan)(guan)電(dian)路(lu)；三是電(dian)源開(kai)關(guan)(guan)未接(jie)通(tong)主電(dian)路(lu)。

7、啟(qi)動(dong)(dong)時(shi)(shi)只有輕微(wei)“嗒”的一聲，再無任(ren)何反應，這是啟(qi)動(dong)(dong)繼電器發卡所致。這時(shi)(shi)只要按(an)一下電磁鐵尾部(bu)，迫使(shi)電磁鐵前移，即(ji)可將(jiang)啟(qi)動(dong)(dong)電路(lu)接通，從而使(shi)發動(dong)(dong)機啟(qi)動(dong)(dong)。