一、電動車電機功率怎么看

1、國(guo)家(jia)標準規定(ding)電(dian)動(dong)車電(dian)機功率不得大于400W。

2、電(dian)機上(shang)一般不(bu)會寫功率，只(zhi)能看(kan)說明書或向(xiang)銷售人員或廠家咨(zi)詢。

3、一般電動(dong)車(che)電機(ji)(ji)功率(lv)有(you)350w、450w、500w、最高的800w，很(hen)多64v的電動(dong)車(che)，大部分(fen)是350w。如果輪(lun)胎是300—10（跟摩(mo)(mo)托車(che)輪(lun)轂直徑(jing)和(he)寬度一樣(yang)）的話(hua)，那個(ge)叫電動(dong)摩(mo)(mo)托車(che)，那就是500w至(zhi)800w電機(ji)(ji)。

二、電動車電機的工作原理

電動(dong)車(che)電機是(shi)把(ba)電能(neng)轉(zhuan)換成機械能(neng)的一種設備。它是(shi)利(li)用(yong)通電線圈（也就是(shi)定子繞組）產生旋轉(zhuan)磁(ci)場(chang)并作用(yong)于轉(zhuan)子鼠(shu)籠式式閉合鋁框形成磁(ci)電動(dong)力旋轉(zhuan)扭矩。

電(dian)(dian)動車電(dian)(dian)機(ji)按(an)使(shi)用(yong)電(dian)(dian)源不(bu)同(tong)分為直流(liu)電(dian)(dian)動機(ji)和(he)交流(liu)電(dian)(dian)動機(ji)，電(dian)(dian)力系(xi)統中的電(dian)(dian)動機(ji)大部(bu)分是(shi)交流(liu)電(dian)(dian)機(ji)，可以(yi)是(shi)同(tong)步電(dian)(dian)機(ji)或者(zhe)是(shi)異步電(dian)(dian)機(ji)（電(dian)(dian)機(ji)定子磁場(chang)(chang)轉速(su)與(yu)轉子旋轉轉速(su)不(bu)保持同(tong)步速(su)）。電(dian)(dian)動機(ji)主要由(you)定子與(yu)轉子組成(cheng)，通電(dian)(dian)導線在磁場(chang)(chang)中受(shou)力運動的方(fang)向跟電(dian)(dian)流(liu)方(fang)向和(he)磁感(gan)線（磁場(chang)(chang)方(fang)向）方(fang)向有關(guan)。電(dian)(dian)動機(ji)工作原(yuan)理是(shi)磁場(chang)(chang)對電(dian)(dian)流(liu)受(shou)力的作用(yong)，使(shi)電(dian)(dian)動機(ji)轉動。

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三、電動汽車電機維修教程

在發(fa)動(dong)(dong)(dong)機(ji)(ji)一切(qie)正常的情況下(xia)，啟(qi)(qi)動(dong)(dong)(dong)機(ji)(ji)或蓄電池(chi)有故(gu)障(zhang)(zhang)都會(hui)使發(fa)動(dong)(dong)(dong)機(ji)(ji)難以啟(qi)(qi)動(dong)(dong)(dong)，甚(shen)至不能啟(qi)(qi)動(dong)(dong)(dong)。遇此情況，首先(xian)要了解啟(qi)(qi)動(dong)(dong)(dong)機(ji)(ji)與蓄電池(chi)的使用情況，以便大致判(pan)斷故(gu)障(zhang)(zhang)部位。若(ruo)蓄電池(chi)使用時(shi)間(jian)(jian)已經(jing)超過1年，應(ying)重點檢查(cha)其(qi)技術(shu)狀況；若(ruo)蓄電池(chi)使用時(shi)間(jian)(jian)較短(duan)，而(er)啟(qi)(qi)動(dong)(dong)(dong)機(ji)(ji)長時(shi)間(jian)(jian)未檢修(xiu)，則應(ying)從啟(qi)(qi)動(dong)(dong)(dong)機(ji)(ji)查(cha)起。然后根(gen)據啟(qi)(qi)動(dong)(dong)(dong)時(shi)的故(gu)障(zhang)(zhang)現象進行(xing)分析和處理(li)：

1、啟動時(shi)只(zhi)聽(ting)到啟動機電(dian)磁(ci)開關(guan)“咯(ge)(ge)咯(ge)(ge)”聲，或首次啟動時(shi)啟動機帶動曲(qu)軸緩轉幾(ji)下，繼而(er)出現啟動電(dian)磁(ci)開關(guan)“咯(ge)(ge)咯(ge)(ge)”響，但(dan)曲(qu)軸卻不轉動。此(ci)現象一(yi)般屬于蓄電(dian)池“斷格(ge)”故障。

2、臨時(shi)停車(che)每次(ci)都能(neng)啟(qi)動，但停車(che)時(shi)間較長或第(di)二天啟(qi)動時(shi)卻只能(neng)使曲軸(zhou)轉(zhuan)一(yi)下。此現(xian)象屬(shu)于蓄電池(chi)自(zi)放電嚴(yan)重，其極板(ban)、隔(ge)板(ban)嚴(yan)重老化，說明該蓄電池(chi)已經接近(jin)報廢。

3、啟(qi)動時啟(qi)動機突然(ran)轉動無力，并(bing)伴有(you)燒橡膠氣(qi)味(wei)或(huo)蓄電(dian)池處有(you)煙(yan)冒出，多屬極(ji)樁、極(ji)樁夾子接觸不良(liang)而發熱燒損。

4、若啟(qi)動(dong)(dong)時(shi)啟(qi)動(dong)(dong)機(ji)(ji)驅(qu)(qu)動(dong)(dong)齒(chi)(chi)(chi)輪與發(fa)(fa)動(dong)(dong)機(ji)(ji)飛輪齒(chi)(chi)(chi)圈發(fa)(fa)出撞擊的空轉聲，其原(yuan)因有二：一(yi)是(shi)飛輪齒(chi)(chi)(chi)圈的嚙合(he)切入面變形；二是(shi)啟(qi)動(dong)(dong)機(ji)(ji)驅(qu)(qu)動(dong)(dong)齒(chi)(chi)(chi)輪與飛輪齒(chi)(chi)(chi)圈的間隙(xi)太大。兩者(zhe)無法嚙合(he)，發(fa)(fa)動(dong)(dong)機(ji)(ji)也(ye)就不能啟(qi)動(dong)(dong)。

5、電(dian)源總開(kai)關一(yi)接(jie)通(tong)，啟動(dong)(dong)(dong)(dong)(dong)機(ji)驅(qu)動(dong)(dong)(dong)(dong)(dong)齒(chi)(chi)(chi)輪就和飛輪齒(chi)(chi)(chi)圈嚙合在(zai)一(yi)起(qi)轉動(dong)(dong)(dong)(dong)(dong)。出(chu)現這(zhe)種故(gu)障，一(yi)是啟動(dong)(dong)(dong)(dong)(dong)機(ji)電(dian)磁開(kai)關的(de)保持(chi)線圈錯(cuo)(cuo)接(jie)在(zai)了電(dian)源接(jie)線柱上(shang)；二是鑰匙開(kai)關上(shang)的(de)3根線接(jie)錯(cuo)(cuo)，判斷方法(fa)是：鑰匙在(zai)“0”位置時啟動(dong)(dong)(dong)(dong)(dong)機(ji)驅(qu)動(dong)(dong)(dong)(dong)(dong)齒(chi)(chi)(chi)輪不轉，在(zai)“2”位置時啟動(dong)(dong)(dong)(dong)(dong)電(dian)機(ji)驅(qu)動(dong)(dong)(dong)(dong)(dong)齒(chi)(chi)(chi)輪與飛輪齒(chi)(chi)(chi)圈嚙合一(yi)起(qi)轉動(dong)(dong)(dong)(dong)(dong)。

6、啟(qi)(qi)動開(kai)(kai)關(guan)轉到啟(qi)(qi)動位(wei)置發動機不能啟(qi)(qi)動，也無(wu)其他(ta)現象。這種故障，一是(shi)鑰(yao)匙、開(kai)(kai)關(guan)因磨損而未(wei)接(jie)通(tong)啟(qi)(qi)動電(dian)(dian)(dian)路；二是(shi)啟(qi)(qi)動機繼電(dian)(dian)(dian)器未(wei)接(jie)通(tong)啟(qi)(qi)動機電(dian)(dian)(dian)磁開(kai)(kai)關(guan)電(dian)(dian)(dian)路；三(san)是(shi)電(dian)(dian)(dian)源開(kai)(kai)關(guan)未(wei)接(jie)通(tong)主(zhu)電(dian)(dian)(dian)路。

7、啟(qi)動(dong)(dong)(dong)時(shi)(shi)只(zhi)有輕微“嗒”的(de)一聲(sheng)，再無任(ren)何(he)反應，這是啟(qi)動(dong)(dong)(dong)繼電器發卡所致。這時(shi)(shi)只(zhi)要按(an)一下電磁(ci)(ci)鐵(tie)尾部(bu)，迫使(shi)電磁(ci)(ci)鐵(tie)前移，即可將啟(qi)動(dong)(dong)(dong)電路接(jie)通，從而(er)使(shi)發動(dong)(dong)(dong)機啟(qi)動(dong)(dong)(dong)。