一、電動車電機功率怎么看

1、國家標(biao)準規定電(dian)動車電(dian)機(ji)功率不(bu)得大于400W。

2、電機上(shang)一般不會寫功率，只能看說明書或向銷售人員或廠家(jia)咨詢。

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

二、電動車電機的工作原理

電動(dong)車電機是(shi)(shi)把電能(neng)轉(zhuan)換成機械(xie)能(neng)的(de)一種設備。它是(shi)(shi)利用(yong)通電線圈（也就(jiu)是(shi)(shi)定子繞組(zu)）產生旋轉(zhuan)磁(ci)場并作用(yong)于轉(zhuan)子鼠籠式式閉(bi)合鋁框形成磁(ci)電動(dong)力旋轉(zhuan)扭矩。

電(dian)(dian)(dian)(dian)動(dong)(dong)車電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)按使用電(dian)(dian)(dian)(dian)源不(bu)(bu)同(tong)分(fen)為直流(liu)(liu)電(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)(ji)和(he)交流(liu)(liu)電(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)(ji)，電(dian)(dian)(dian)(dian)力系統中的(de)電(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)(ji)大(da)部分(fen)是交流(liu)(liu)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)，可以是同(tong)步(bu)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)或者是異步(bu)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)（電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)定子(zi)磁(ci)場轉(zhuan)速(su)(su)與(yu)轉(zhuan)子(zi)旋(xuan)轉(zhuan)轉(zhuan)速(su)(su)不(bu)(bu)保(bao)持同(tong)步(bu)速(su)(su)）。電(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)(ji)主(zhu)要由定子(zi)與(yu)轉(zhuan)子(zi)組成，通電(dian)(dian)(dian)(dian)導線在磁(ci)場中受力運(yun)動(dong)(dong)的(de)方(fang)向(xiang)(xiang)跟電(dian)(dian)(dian)(dian)流(liu)(liu)方(fang)向(xiang)(xiang)和(he)磁(ci)感線（磁(ci)場方(fang)向(xiang)(xiang)）方(fang)向(xiang)(xiang)有關。電(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)(ji)工作(zuo)原理(li)是磁(ci)場對電(dian)(dian)(dian)(dian)流(liu)(liu)受力的(de)作(zuo)用，使電(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)(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)機(ji)一切正常的情況下，啟(qi)動(dong)機(ji)或蓄電池有故障都會使發動(dong)機(ji)難以(yi)啟(qi)動(dong)，甚(shen)至不能啟(qi)動(dong)。遇此情況，首先要了解啟(qi)動(dong)機(ji)與蓄電池的使用(yong)情況，以(yi)便大致(zhi)判斷(duan)故障部位。若蓄電池使用(yong)時(shi)(shi)間(jian)已經(jing)超過1年(nian)，應重點(dian)檢查(cha)其技術狀(zhuang)況；若蓄電池使用(yong)時(shi)(shi)間(jian)較(jiao)短，而啟(qi)動(dong)機(ji)長時(shi)(shi)間(jian)未檢修(xiu)，則應從(cong)啟(qi)動(dong)機(ji)查(cha)起。然后根據啟(qi)動(dong)時(shi)(shi)的故障現象進行分析和處理：

1、啟(qi)動(dong)時(shi)只聽(ting)到啟(qi)動(dong)機電磁開(kai)關(guan)“咯咯”聲，或首次(ci)啟(qi)動(dong)時(shi)啟(qi)動(dong)機帶(dai)動(dong)曲軸(zhou)(zhou)緩(huan)轉幾下，繼(ji)而出現啟(qi)動(dong)電磁開(kai)關(guan)“咯咯”響，但曲軸(zhou)(zhou)卻不(bu)轉動(dong)。此現象一(yi)般屬(shu)于(yu)蓄電池(chi)“斷格”故障(zhang)。

2、臨時停(ting)(ting)車每(mei)次都能啟動(dong)，但停(ting)(ting)車時間較長或第二(er)天啟動(dong)時卻只能使曲軸轉一(yi)下。此現象屬于蓄(xu)電池自放(fang)電嚴重，其極板、隔板嚴重老化，說明(ming)該蓄(xu)電池已經接(jie)近報廢。

3、啟(qi)動(dong)時啟(qi)動(dong)機突然(ran)轉(zhuan)動(dong)無(wu)力，并(bing)伴有(you)燒(shao)橡膠(jiao)氣味或(huo)蓄電(dian)池處(chu)有(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(ji)(ji)驅(qu)動(dong)齒(chi)輪(lun)與(yu)發動(dong)機(ji)(ji)飛(fei)(fei)輪(lun)齒(chi)圈發出撞擊的空轉聲，其原因有二：一是(shi)飛(fei)(fei)輪(lun)齒(chi)圈的嚙(nie)合(he)切(qie)入面變形；二是(shi)啟(qi)動(dong)機(ji)(ji)驅(qu)動(dong)齒(chi)輪(lun)與(yu)飛(fei)(fei)輪(lun)齒(chi)圈的間隙太大。兩者無法嚙(nie)合(he)，發動(dong)機(ji)(ji)也就不能啟(qi)動(dong)。

5、電(dian)源總(zong)開(kai)關(guan)一(yi)接(jie)通，啟(qi)動(dong)(dong)(dong)機(ji)驅動(dong)(dong)(dong)齒(chi)(chi)(chi)輪(lun)就和飛輪(lun)齒(chi)(chi)(chi)圈嚙合(he)在(zai)一(yi)起轉(zhuan)動(dong)(dong)(dong)。出現這種故障，一(yi)是(shi)啟(qi)動(dong)(dong)(dong)機(ji)電(dian)磁開(kai)關(guan)的保持線(xian)圈錯接(jie)在(zai)了電(dian)源接(jie)線(xian)柱上；二(er)是(shi)鑰(yao)匙(chi)開(kai)關(guan)上的3根線(xian)接(jie)錯，判(pan)斷方法是(shi)：鑰(yao)匙(chi)在(zai)“0”位(wei)置(zhi)時啟(qi)動(dong)(dong)(dong)機(ji)驅動(dong)(dong)(dong)齒(chi)(chi)(chi)輪(lun)不轉(zhuan)，在(zai)“2”位(wei)置(zhi)時啟(qi)動(dong)(dong)(dong)電(dian)機(ji)驅動(dong)(dong)(dong)齒(chi)(chi)(chi)輪(lun)與飛輪(lun)齒(chi)(chi)(chi)圈嚙合(he)一(yi)起轉(zhuan)動(dong)(dong)(dong)。

6、啟(qi)動(dong)(dong)開關轉到啟(qi)動(dong)(dong)位置發(fa)動(dong)(dong)機不(bu)能啟(qi)動(dong)(dong)，也(ye)無其(qi)他現(xian)象。這種故障(zhang)，一是鑰匙、開關因(yin)磨損(sun)而(er)未接(jie)通啟(qi)動(dong)(dong)電(dian)(dian)路(lu)；二是啟(qi)動(dong)(dong)機繼電(dian)(dian)器未接(jie)通啟(qi)動(dong)(dong)機電(dian)(dian)磁開關電(dian)(dian)路(lu)；三是電(dian)(dian)源開關未接(jie)通主(zhu)電(dian)(dian)路(lu)。

7、啟動時只有(you)輕微“嗒”的(de)一聲，再無任何反應，這是啟動繼電(dian)器發(fa)(fa)卡所(suo)致。這時只要按(an)一下電(dian)磁鐵尾部，迫(po)使電(dian)磁鐵前移，即可將啟動電(dian)路接通，從(cong)而使發(fa)(fa)動機啟動。