一、電動車電機功率怎么看

1、國家標準規定(ding)電動車電機(ji)功率不得(de)大于400W。

2、電機(ji)上一般不會寫功率，只(zhi)能看說明書或(huo)向銷售(shou)人(ren)員或(huo)廠家咨(zi)詢。

3、一(yi)般(ban)電(dian)(dian)動(dong)車電(dian)(dian)機(ji)功率有350w、450w、500w、最(zui)高(gao)的(de)800w，很(hen)多64v的(de)電(dian)(dian)動(dong)車，大部分是350w。如果(guo)輪胎是300—10（跟摩托(tuo)車輪轂直徑和寬度一(yi)樣）的(de)話，那個(ge)叫電(dian)(dian)動(dong)摩托(tuo)車，那就是500w至(zhi)800w電(dian)(dian)機(ji)。

二、電動車電機的工作原理

電動車電機是(shi)把電能轉(zhuan)換成機械(xie)能的一種設備(bei)。它是(shi)利用通電線圈（也就(jiu)是(shi)定(ding)子(zi)繞組）產生旋(xuan)轉(zhuan)磁(ci)場并作用于轉(zhuan)子(zi)鼠(shu)籠式(shi)式(shi)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)(ji)按使用電(dian)(dian)(dian)源不同分(fen)(fen)為(wei)直流(liu)電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)和(he)交(jiao)流(liu)電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)，電(dian)(dian)(dian)力(li)系(xi)統(tong)中的電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)大部分(fen)(fen)是(shi)(shi)交(jiao)流(liu)電(dian)(dian)(dian)機(ji)(ji)，可以(yi)是(shi)(shi)同步電(dian)(dian)(dian)機(ji)(ji)或者是(shi)(shi)異(yi)步電(dian)(dian)(dian)機(ji)(ji)（電(dian)(dian)(dian)機(ji)(ji)定子磁(ci)場(chang)轉(zhuan)(zhuan)(zhuan)速與轉(zhuan)(zhuan)(zhuan)子旋轉(zhuan)(zhuan)(zhuan)轉(zhuan)(zhuan)(zhuan)速不保持同步速）。電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)主(zhu)要由(you)定子與轉(zhuan)(zhuan)(zhuan)子組成(cheng)，通電(dian)(dian)(dian)導線在磁(ci)場(chang)中受力(li)運(yun)動(dong)(dong)(dong)的方向(xiang)(xiang)跟電(dian)(dian)(dian)流(liu)方向(xiang)(xiang)和(he)磁(ci)感線（磁(ci)場(chang)方向(xiang)(xiang)）方向(xiang)(xiang)有(you)關。電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)工作原理(li)是(shi)(shi)磁(ci)場(chang)對電(dian)(dian)(dian)流(liu)受力(li)的作用，使電(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)轉(zhuan)(zhuan)(zhuan)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(zai)發(fa)動(dong)(dong)機(ji)一切正常的(de)情況(kuang)下，啟(qi)(qi)動(dong)(dong)機(ji)或蓄(xu)電(dian)池(chi)(chi)有故(gu)障都會使發(fa)動(dong)(dong)機(ji)難以啟(qi)(qi)動(dong)(dong)，甚至不能啟(qi)(qi)動(dong)(dong)。遇此情況(kuang)，首先要了(le)解啟(qi)(qi)動(dong)(dong)機(ji)與(yu)蓄(xu)電(dian)池(chi)(chi)的(de)使用(yong)(yong)情況(kuang)，以便大致判斷(duan)故(gu)障部位。若蓄(xu)電(dian)池(chi)(chi)使用(yong)(yong)時(shi)(shi)間已經超過1年，應重點檢查(cha)其技術狀(zhuang)況(kuang)；若蓄(xu)電(dian)池(chi)(chi)使用(yong)(yong)時(shi)(shi)間較短，而啟(qi)(qi)動(dong)(dong)機(ji)長時(shi)(shi)間未檢修(xiu)，則應從啟(qi)(qi)動(dong)(dong)機(ji)查(cha)起。然后根據啟(qi)(qi)動(dong)(dong)時(shi)(shi)的(de)故(gu)障現象進行分析和處理：

1、啟(qi)動(dong)(dong)時(shi)(shi)只聽到啟(qi)動(dong)(dong)機電磁(ci)開關(guan)(guan)“咯咯”聲，或首次啟(qi)動(dong)(dong)時(shi)(shi)啟(qi)動(dong)(dong)機帶動(dong)(dong)曲軸(zhou)緩轉(zhuan)幾(ji)下，繼而(er)出(chu)現啟(qi)動(dong)(dong)電磁(ci)開關(guan)(guan)“咯咯”響，但曲軸(zhou)卻不轉(zhuan)動(dong)(dong)。此(ci)現象一般屬(shu)于蓄電池“斷格”故障。

2、臨時停(ting)車每次都能啟(qi)動，但停(ting)車時間較長或(huo)第二(er)天啟(qi)動時卻只能使曲軸(zhou)轉一(yi)下。此現象(xiang)屬于蓄電(dian)池(chi)自放電(dian)嚴重(zhong)，其極板、隔板嚴重(zhong)老化，說明該蓄電(dian)池(chi)已經(jing)接近報廢。

3、啟動時啟動機突(tu)然轉(zhuan)動無力，并伴有(you)燒橡膠氣味或(huo)蓄電(dian)池(chi)處有(you)煙冒出，多屬極(ji)樁、極(ji)樁夾子接觸不良而發(fa)熱燒損。

4、若(ruo)啟動(dong)(dong)時啟動(dong)(dong)機驅動(dong)(dong)齒輪(lun)(lun)與(yu)發(fa)動(dong)(dong)機飛(fei)輪(lun)(lun)齒圈(quan)發(fa)出(chu)撞擊的空轉(zhuan)聲(sheng)，其(qi)原因有二：一是(shi)飛(fei)輪(lun)(lun)齒圈(quan)的嚙(nie)合切(qie)入面(mian)變形；二是(shi)啟動(dong)(dong)機驅動(dong)(dong)齒輪(lun)(lun)與(yu)飛(fei)輪(lun)(lun)齒圈(quan)的間隙(xi)太大。兩者無法(fa)嚙(nie)合，發(fa)動(dong)(dong)機也就不能啟動(dong)(dong)。

5、電(dian)源(yuan)總開關(guan)一(yi)(yi)(yi)接通，啟(qi)動(dong)機(ji)驅動(dong)齒(chi)輪就和(he)飛(fei)輪齒(chi)圈嚙(nie)合在一(yi)(yi)(yi)起(qi)轉動(dong)。出現這(zhe)種故障，一(yi)(yi)(yi)是啟(qi)動(dong)機(ji)電(dian)磁開關(guan)的保持線圈錯接在了電(dian)源(yuan)接線柱上；二是鑰匙(chi)(chi)開關(guan)上的3根線接錯，判斷方(fang)法是：鑰匙(chi)(chi)在“0”位置時啟(qi)動(dong)機(ji)驅動(dong)齒(chi)輪不轉，在“2”位置時啟(qi)動(dong)電(dian)機(ji)驅動(dong)齒(chi)輪與飛(fei)輪齒(chi)圈嚙(nie)合一(yi)(yi)(yi)起(qi)轉動(dong)。

6、啟動(dong)(dong)開關轉(zhuan)到(dao)啟動(dong)(dong)位置發動(dong)(dong)機(ji)不能(neng)啟動(dong)(dong)，也無其他現象。這種故障，一是鑰匙、開關因磨損而未接通啟動(dong)(dong)電(dian)路(lu)(lu)；二(er)是啟動(dong)(dong)機(ji)繼電(dian)器(qi)未接通啟動(dong)(dong)機(ji)電(dian)磁開關電(dian)路(lu)(lu)；三是電(dian)源開關未接通主電(dian)路(lu)(lu)。

7、啟動(dong)時只(zhi)有輕微“嗒(da)”的一(yi)聲(sheng)，再(zai)無任何反應，這是(shi)啟動(dong)繼(ji)電器發卡所致(zhi)。這時只(zhi)要按(an)一(yi)下(xia)電磁鐵尾部(bu)，迫使電磁鐵前移，即(ji)可(ke)將啟動(dong)電路(lu)接(jie)通，從而(er)使發動(dong)機啟動(dong)。