一、電動車電機功率怎么看

1、國家標準規定(ding)電動車電機功率不得大于(yu)400W。

2、電機上一般不會寫功率，只能看說明(ming)書(shu)或(huo)向銷(xiao)售(shou)人員或(huo)廠家咨詢。

3、一(yi)般電動(dong)車(che)(che)電機(ji)功率(lv)有350w、450w、500w、最(zui)高的800w，很(hen)多64v的電動(dong)車(che)(che)，大(da)部分是350w。如果(guo)輪胎是300—10（跟摩(mo)托(tuo)車(che)(che)輪轂(gu)直徑和寬(kuan)度一(yi)樣）的話，那個叫(jiao)電動(dong)摩(mo)托(tuo)車(che)(che)，那就(jiu)是500w至800w電機(ji)。

二、電動車電機的工作原理

電動車電機(ji)是(shi)把(ba)電能轉(zhuan)換成機(ji)械能的一種設備。它是(shi)利用(yong)通(tong)電線圈（也就(jiu)是(shi)定子繞組）產生旋(xuan)轉(zhuan)磁(ci)場并作(zuo)用(yong)于轉(zhuan)子鼠籠式式閉合鋁框形成磁(ci)電動力旋(xuan)轉(zhuan)扭矩。

電(dian)(dian)(dian)動(dong)(dong)(dong)車電(dian)(dian)(dian)機(ji)按使(shi)用電(dian)(dian)(dian)源不同分(fen)為直流電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)和交(jiao)流電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)，電(dian)(dian)(dian)力系統中(zhong)的電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)大部分(fen)是(shi)交(jiao)流電(dian)(dian)(dian)機(ji)，可以(yi)是(shi)同步電(dian)(dian)(dian)機(ji)或者是(shi)異步電(dian)(dian)(dian)機(ji)（電(dian)(dian)(dian)機(ji)定子磁(ci)場(chang)轉速(su)與(yu)轉子旋轉轉速(su)不保(bao)持(chi)同步速(su)）。電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)主要(yao)由(you)定子與(yu)轉子組成，通(tong)電(dian)(dian)(dian)導線在磁(ci)場(chang)中(zhong)受(shou)力運動(dong)(dong)(dong)的方(fang)向(xiang)(xiang)跟電(dian)(dian)(dian)流方(fang)向(xiang)(xiang)和磁(ci)感(gan)線（磁(ci)場(chang)方(fang)向(xiang)(xiang)）方(fang)向(xiang)(xiang)有關(guan)。電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)工作原理是(shi)磁(ci)場(chang)對電(dian)(dian)(dian)流受(shou)力的作用，使(shi)電(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

在發動(dong)(dong)機(ji)(ji)一切正常的(de)(de)情(qing)況下(xia)，啟(qi)(qi)(qi)動(dong)(dong)機(ji)(ji)或蓄(xu)電池(chi)有故(gu)障都(dou)會使(shi)(shi)發動(dong)(dong)機(ji)(ji)難以啟(qi)(qi)(qi)動(dong)(dong)，甚至不(bu)能啟(qi)(qi)(qi)動(dong)(dong)。遇此(ci)情(qing)況，首先要(yao)了解(jie)啟(qi)(qi)(qi)動(dong)(dong)機(ji)(ji)與蓄(xu)電池(chi)的(de)(de)使(shi)(shi)用情(qing)況，以便大致(zhi)判斷故(gu)障部位。若蓄(xu)電池(chi)使(shi)(shi)用時(shi)間(jian)已經超過1年，應(ying)重點檢查(cha)其技(ji)術(shu)狀況；若蓄(xu)電池(chi)使(shi)(shi)用時(shi)間(jian)較短，而啟(qi)(qi)(qi)動(dong)(dong)機(ji)(ji)長時(shi)間(jian)未檢修，則(ze)應(ying)從啟(qi)(qi)(qi)動(dong)(dong)機(ji)(ji)查(cha)起(qi)。然(ran)后根據啟(qi)(qi)(qi)動(dong)(dong)時(shi)的(de)(de)故(gu)障現(xian)象進行分析和處理：

1、啟動(dong)(dong)(dong)時只聽到(dao)啟動(dong)(dong)(dong)機電磁(ci)開關“咯(ge)咯(ge)”聲，或首(shou)次啟動(dong)(dong)(dong)時啟動(dong)(dong)(dong)機帶(dai)動(dong)(dong)(dong)曲軸(zhou)緩轉(zhuan)幾下，繼而出現啟動(dong)(dong)(dong)電磁(ci)開關“咯(ge)咯(ge)”響，但曲軸(zhou)卻(que)不轉(zhuan)動(dong)(dong)(dong)。此現象一般(ban)屬于蓄電池(chi)“斷格”故障。

2、臨時(shi)停(ting)車每次都能啟動，但停(ting)車時(shi)間較長或(huo)第二(er)天啟動時(shi)卻(que)只能使曲軸轉一下。此現象屬于蓄電池自放電嚴(yan)重，其極板(ban)(ban)、隔板(ban)(ban)嚴(yan)重老化，說明該蓄電池已經接近(jin)報廢(fei)。

3、啟(qi)動時啟(qi)動機突然(ran)轉動無力(li)，并伴有燒橡(xiang)膠(jiao)氣味或蓄電(dian)池(chi)處有煙(yan)冒出，多屬極(ji)樁(zhuang)、極(ji)樁(zhuang)夾子接觸不良而(er)發熱燒損。

4、若啟(qi)(qi)(qi)動(dong)(dong)(dong)時啟(qi)(qi)(qi)動(dong)(dong)(dong)機(ji)(ji)驅動(dong)(dong)(dong)齒(chi)輪與(yu)發(fa)(fa)動(dong)(dong)(dong)機(ji)(ji)飛(fei)輪齒(chi)圈(quan)發(fa)(fa)出撞擊(ji)的空轉(zhuan)聲，其原因有二：一是(shi)飛(fei)輪齒(chi)圈(quan)的嚙合切入面變形；二是(shi)啟(qi)(qi)(qi)動(dong)(dong)(dong)機(ji)(ji)驅動(dong)(dong)(dong)齒(chi)輪與(yu)飛(fei)輪齒(chi)圈(quan)的間隙太大。兩者(zhe)無法嚙合，發(fa)(fa)動(dong)(dong)(dong)機(ji)(ji)也就不(bu)能啟(qi)(qi)(qi)動(dong)(dong)(dong)。

5、電源總開(kai)關(guan)(guan)一(yi)(yi)接通(tong)，啟動(dong)(dong)(dong)機驅動(dong)(dong)(dong)齒輪就和(he)飛(fei)輪齒圈(quan)嚙(nie)合(he)在(zai)(zai)一(yi)(yi)起(qi)轉動(dong)(dong)(dong)。出現這(zhe)種故障(zhang)，一(yi)(yi)是啟動(dong)(dong)(dong)機電磁(ci)開(kai)關(guan)(guan)的(de)保持線(xian)圈(quan)錯接在(zai)(zai)了電源接線(xian)柱上；二是鑰(yao)匙開(kai)關(guan)(guan)上的(de)3根線(xian)接錯，判斷方法是：鑰(yao)匙在(zai)(zai)“0”位置(zhi)時啟動(dong)(dong)(dong)機驅動(dong)(dong)(dong)齒輪不(bu)轉，在(zai)(zai)“2”位置(zhi)時啟動(dong)(dong)(dong)電機驅動(dong)(dong)(dong)齒輪與飛(fei)輪齒圈(quan)嚙(nie)合(he)一(yi)(yi)起(qi)轉動(dong)(dong)(dong)。

6、啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)開關(guan)轉到(dao)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)位置發動(dong)(dong)(dong)(dong)機(ji)不能(neng)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)，也(ye)無(wu)其他現象。這種故(gu)障，一是(shi)鑰匙(chi)、開關(guan)因磨損(sun)而未(wei)(wei)接(jie)(jie)通(tong)(tong)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)電路；二是(shi)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)機(ji)繼電器(qi)未(wei)(wei)接(jie)(jie)通(tong)(tong)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)機(ji)電磁開關(guan)電路；三是(shi)電源開關(guan)未(wei)(wei)接(jie)(jie)通(tong)(tong)主電路。

7、啟(qi)動時只有(you)輕微“嗒”的一(yi)(yi)聲，再(zai)無任何反應，這是啟(qi)動繼電(dian)器發卡所致。這時只要(yao)按一(yi)(yi)下電(dian)磁鐵尾部，迫使電(dian)磁鐵前移，即可將啟(qi)動電(dian)路接通，從而使發動機(ji)啟(qi)動。