一、電動車電機功率怎么看

1、國家(jia)標(biao)準規定電(dian)動車(che)電(dian)機功率不(bu)得(de)大于400W。

2、電機上一般不會寫功率，只能看說明書或向銷(xiao)售(shou)人(ren)員或廠(chang)家(jia)咨詢。

3、一般電(dian)(dian)(dian)動(dong)車電(dian)(dian)(dian)機功(gong)率有350w、450w、500w、最高的(de)800w，很多64v的(de)電(dian)(dian)(dian)動(dong)車，大部分是(shi)(shi)350w。如(ru)果輪(lun)胎是(shi)(shi)300—10（跟摩托車輪(lun)轂直徑和寬(kuan)度一樣）的(de)話，那個叫電(dian)(dian)(dian)動(dong)摩托車，那就是(shi)(shi)500w至(zhi)800w電(dian)(dian)(dian)機。

二、電動車電機的工作原理

電動車電機(ji)是(shi)把電能(neng)轉(zhuan)換成機(ji)械能(neng)的一種設(she)備。它(ta)是(shi)利用通電線圈（也就(jiu)是(shi)定子(zi)繞(rao)組）產生旋(xuan)轉(zhuan)磁場并作用于轉(zhuan)子(zi)鼠籠式式閉(bi)合鋁框形成磁電動力(li)旋(xuan)轉(zhuan)扭矩。

電(dian)(dian)(dian)動(dong)(dong)車電(dian)(dian)(dian)機(ji)按使用(yong)電(dian)(dian)(dian)源不同(tong)(tong)分為直流(liu)電(dian)(dian)(dian)動(dong)(dong)機(ji)和交流(liu)電(dian)(dian)(dian)動(dong)(dong)機(ji)，電(dian)(dian)(dian)力系(xi)統中的電(dian)(dian)(dian)動(dong)(dong)機(ji)大部分是交流(liu)電(dian)(dian)(dian)機(ji)，可以是同(tong)(tong)步電(dian)(dian)(dian)機(ji)或者是異(yi)步電(dian)(dian)(dian)機(ji)（電(dian)(dian)(dian)機(ji)定(ding)子(zi)磁場轉(zhuan)速與轉(zhuan)子(zi)旋轉(zhuan)轉(zhuan)速不保持同(tong)(tong)步速）。電(dian)(dian)(dian)動(dong)(dong)機(ji)主要由(you)定(ding)子(zi)與轉(zhuan)子(zi)組成，通電(dian)(dian)(dian)導線在磁場中受力運動(dong)(dong)的方(fang)向跟電(dian)(dian)(dian)流(liu)方(fang)向和磁感線（磁場方(fang)向）方(fang)向有關。電(dian)(dian)(dian)動(dong)(dong)機(ji)工作(zuo)原(yuan)理是磁場對電(dian)(dian)(dian)流(liu)受力的作(zuo)用(yong)，使電(dian)(dian)(dian)動(dong)(dong)機(ji)轉(zhuan)動(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

在發動(dong)(dong)(dong)機(ji)一切正常的(de)情況(kuang)(kuang)下，啟(qi)(qi)(qi)動(dong)(dong)(dong)機(ji)或蓄電(dian)池有故障(zhang)都會(hui)使發動(dong)(dong)(dong)機(ji)難以啟(qi)(qi)(qi)動(dong)(dong)(dong)，甚(shen)至不(bu)能啟(qi)(qi)(qi)動(dong)(dong)(dong)。遇此(ci)情況(kuang)(kuang)，首(shou)先要了(le)解啟(qi)(qi)(qi)動(dong)(dong)(dong)機(ji)與蓄電(dian)池的(de)使用(yong)情況(kuang)(kuang)，以便大致判斷故障(zhang)部位。若(ruo)蓄電(dian)池使用(yong)時(shi)間已(yi)經超過1年，應重點檢查其技術狀況(kuang)(kuang)；若(ruo)蓄電(dian)池使用(yong)時(shi)間較短，而啟(qi)(qi)(qi)動(dong)(dong)(dong)機(ji)長時(shi)間未(wei)檢修，則應從(cong)啟(qi)(qi)(qi)動(dong)(dong)(dong)機(ji)查起。然后根據啟(qi)(qi)(qi)動(dong)(dong)(dong)時(shi)的(de)故障(zhang)現(xian)象進行分析和處理：

1、啟(qi)動(dong)(dong)時只聽到啟(qi)動(dong)(dong)機電磁(ci)開關(guan)“咯(ge)咯(ge)”聲，或(huo)首次(ci)啟(qi)動(dong)(dong)時啟(qi)動(dong)(dong)機帶動(dong)(dong)曲軸緩(huan)轉(zhuan)幾下，繼而出(chu)現(xian)啟(qi)動(dong)(dong)電磁(ci)開關(guan)“咯(ge)咯(ge)”響，但(dan)曲軸卻不(bu)轉(zhuan)動(dong)(dong)。此現(xian)象(xiang)一般屬于蓄(xu)電池“斷格”故障。

2、臨時停車每次都(dou)能啟(qi)動，但停車時間較(jiao)長或第(di)二(er)天啟(qi)動時卻(que)只能使曲軸轉一下。此現象屬于(yu)蓄電池自放電嚴(yan)重，其(qi)極(ji)板、隔板嚴(yan)重老化(hua)，說明該蓄電池已經接近(jin)報(bao)廢(fei)。

3、啟動時啟動機突然轉動無(wu)力，并伴有(you)燒(shao)橡膠氣味或蓄電(dian)池處有(you)煙(yan)冒出(chu)，多屬極樁(zhuang)、極樁(zhuang)夾子接觸不良而發熱燒(shao)損。

4、若啟(qi)動(dong)(dong)(dong)時啟(qi)動(dong)(dong)(dong)機(ji)驅動(dong)(dong)(dong)齒(chi)輪與(yu)發動(dong)(dong)(dong)機(ji)飛(fei)輪齒(chi)圈發出撞擊(ji)的空(kong)轉聲，其原因(yin)有二(er)：一是飛(fei)輪齒(chi)圈的嚙合(he)切入面變形；二(er)是啟(qi)動(dong)(dong)(dong)機(ji)驅動(dong)(dong)(dong)齒(chi)輪與(yu)飛(fei)輪齒(chi)圈的間隙太大。兩者無法(fa)嚙合(he)，發動(dong)(dong)(dong)機(ji)也就不能啟(qi)動(dong)(dong)(dong)。

5、電(dian)(dian)源(yuan)總開關一接通(tong)，啟動(dong)(dong)(dong)機(ji)驅(qu)動(dong)(dong)(dong)齒(chi)(chi)輪(lun)就和飛輪(lun)齒(chi)(chi)圈嚙合在一起轉(zhuan)動(dong)(dong)(dong)。出現(xian)這(zhe)種(zhong)故障(zhang)，一是(shi)啟動(dong)(dong)(dong)機(ji)電(dian)(dian)磁開關的(de)保持(chi)線圈錯接在了電(dian)(dian)源(yuan)接線柱(zhu)上；二是(shi)鑰匙開關上的(de)3根線接錯，判斷方法(fa)是(shi)：鑰匙在“0”位(wei)置時啟動(dong)(dong)(dong)機(ji)驅(qu)動(dong)(dong)(dong)齒(chi)(chi)輪(lun)不轉(zhuan)，在“2”位(wei)置時啟動(dong)(dong)(dong)電(dian)(dian)機(ji)驅(qu)動(dong)(dong)(dong)齒(chi)(chi)輪(lun)與(yu)飛輪(lun)齒(chi)(chi)圈嚙合一起轉(zhuan)動(dong)(dong)(dong)。

6、啟(qi)動(dong)(dong)開關(guan)轉(zhuan)到啟(qi)動(dong)(dong)位置發動(dong)(dong)機不能啟(qi)動(dong)(dong)，也無其(qi)他(ta)現象。這種故障(zhang)，一是鑰(yao)匙、開關(guan)因(yin)磨損(sun)而未接通(tong)啟(qi)動(dong)(dong)電路；二是啟(qi)動(dong)(dong)機繼電器未接通(tong)啟(qi)動(dong)(dong)機電磁開關(guan)電路；三是電源開關(guan)未接通(tong)主電路。

7、啟(qi)動(dong)時只有(you)輕微“嗒”的一(yi)聲，再無任何反應，這是啟(qi)動(dong)繼(ji)電(dian)器發卡(ka)所致。這時只要按一(yi)下電(dian)磁鐵尾部，迫使電(dian)磁鐵前移(yi)，即(ji)可將(jiang)啟(qi)動(dong)電(dian)路接(jie)通，從(cong)而使發動(dong)機啟(qi)動(dong)。