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)功率不得(de)大(da)于400W。

2、電(dian)機上一般(ban)不會寫功(gong)率，只能(neng)看說明書或(huo)向銷售人員或(huo)廠(chang)家咨詢。

3、一般電(dian)(dian)動車電(dian)(dian)機功率有350w、450w、500w、最高的(de)800w，很多64v的(de)電(dian)(dian)動車，大部分(fen)是350w。如果(guo)輪胎是300—10（跟摩托(tuo)車輪轂(gu)直徑和寬度一樣）的(de)話，那個叫電(dian)(dian)動摩托(tuo)車，那就是500w至(zhi)800w電(dian)(dian)機。

二、電動車電機的工作原理

電(dian)(dian)動車(che)電(dian)(dian)機是把電(dian)(dian)能轉(zhuan)換成機械能的一(yi)種設備。它(ta)是利用通電(dian)(dian)線圈(quan)（也(ye)就(jiu)是定(ding)子繞組）產生旋(xuan)轉(zhuan)磁場(chang)并作用于轉(zhuan)子鼠籠式式閉合鋁框形成磁電(dian)(dian)動力(li)旋(xuan)轉(zhuan)扭矩。

電(dian)(dian)(dian)(dian)(dian)動車電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)按(an)使(shi)用(yong)電(dian)(dian)(dian)(dian)(dian)源不同分為直(zhi)流電(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)(ji)和交流電(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)(ji)，電(dian)(dian)(dian)(dian)(dian)力(li)系統中的電(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)(ji)大(da)部分是交流電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)，可以是同步電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)或者是異(yi)步電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)（電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)定(ding)子(zi)(zi)磁場(chang)轉(zhuan)速與轉(zhuan)子(zi)(zi)旋轉(zhuan)轉(zhuan)速不保持同步速）。電(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)(ji)主(zhu)要(yao)由定(ding)子(zi)(zi)與轉(zhuan)子(zi)(zi)組成，通電(dian)(dian)(dian)(dian)(dian)導線在磁場(chang)中受(shou)力(li)運(yun)動的方(fang)向(xiang)跟(gen)電(dian)(dian)(dian)(dian)(dian)流方(fang)向(xiang)和磁感(gan)線（磁場(chang)方(fang)向(xiang)）方(fang)向(xiang)有(you)關。電(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)(ji)工作(zuo)原理是磁場(chang)對電(dian)(dian)(dian)(dian)(dian)流受(shou)力(li)的作(zuo)用(yong)，使(shi)電(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)(ji)轉(zhuan)動。

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)下，啟(qi)(qi)動(dong)(dong)(dong)機(ji)或蓄(xu)電(dian)(dian)池(chi)有故障都會使(shi)發動(dong)(dong)(dong)機(ji)難(nan)以啟(qi)(qi)動(dong)(dong)(dong)，甚(shen)至不(bu)能啟(qi)(qi)動(dong)(dong)(dong)。遇此情況(kuang)，首先(xian)要(yao)了(le)解啟(qi)(qi)動(dong)(dong)(dong)機(ji)與蓄(xu)電(dian)(dian)池(chi)的(de)使(shi)用(yong)情況(kuang)，以便大(da)致判斷故障部位。若蓄(xu)電(dian)(dian)池(chi)使(shi)用(yong)時間(jian)已經超(chao)過(guo)1年，應(ying)重點檢(jian)查其技術狀況(kuang)；若蓄(xu)電(dian)(dian)池(chi)使(shi)用(yong)時間(jian)較短(duan)，而(er)啟(qi)(qi)動(dong)(dong)(dong)機(ji)長時間(jian)未檢(jian)修，則(ze)應(ying)從啟(qi)(qi)動(dong)(dong)(dong)機(ji)查起。然后根據啟(qi)(qi)動(dong)(dong)(dong)時的(de)故障現象進行分析和處理：

1、啟(qi)動時只聽到啟(qi)動機電(dian)磁(ci)開關“咯(ge)咯(ge)”聲(sheng)，或首次啟(qi)動時啟(qi)動機帶動曲軸(zhou)(zhou)緩轉幾下，繼而出現啟(qi)動電(dian)磁(ci)開關“咯(ge)咯(ge)”響，但(dan)曲軸(zhou)(zhou)卻不轉動。此現象(xiang)一般屬于蓄電(dian)池“斷格”故障。

2、臨時停(ting)車每次(ci)都能(neng)啟(qi)動，但停(ting)車時間較(jiao)長(chang)或(huo)第二天啟(qi)動時卻只能(neng)使曲軸轉一(yi)下。此現(xian)象屬于蓄電池(chi)自放電嚴重，其極板、隔板嚴重老(lao)化，說明(ming)該蓄電池(chi)已(yi)經接近報廢。

3、啟動時啟動機突然轉動無力，并(bing)伴(ban)有燒橡膠(jiao)氣(qi)味(wei)或蓄電池處有煙冒出，多屬極樁、極樁夾子(zi)接(jie)觸(chu)不(bu)良而發熱(re)燒損。

4、若啟(qi)(qi)動(dong)時啟(qi)(qi)動(dong)機(ji)驅(qu)動(dong)齒輪(lun)與發動(dong)機(ji)飛(fei)(fei)輪(lun)齒圈(quan)發出(chu)撞擊的空(kong)轉聲(sheng)，其原因有二(er)：一(yi)是飛(fei)(fei)輪(lun)齒圈(quan)的嚙(nie)合(he)切入面變形；二(er)是啟(qi)(qi)動(dong)機(ji)驅(qu)動(dong)齒輪(lun)與飛(fei)(fei)輪(lun)齒圈(quan)的間隙太大。兩者無法嚙(nie)合(he)，發動(dong)機(ji)也就不能(neng)啟(qi)(qi)動(dong)。

5、電源總開關(guan)(guan)一(yi)接通，啟(qi)(qi)動(dong)(dong)(dong)機(ji)驅動(dong)(dong)(dong)齒(chi)(chi)輪(lun)(lun)就(jiu)和飛(fei)輪(lun)(lun)齒(chi)(chi)圈嚙合(he)在一(yi)起轉動(dong)(dong)(dong)。出(chu)現這(zhe)種故(gu)障，一(yi)是(shi)啟(qi)(qi)動(dong)(dong)(dong)機(ji)電磁開關(guan)(guan)的保持(chi)線(xian)圈錯接在了(le)電源接線(xian)柱(zhu)上(shang)；二是(shi)鑰匙開關(guan)(guan)上(shang)的3根線(xian)接錯，判(pan)斷方法是(shi)：鑰匙在“0”位置(zhi)(zhi)時(shi)啟(qi)(qi)動(dong)(dong)(dong)機(ji)驅動(dong)(dong)(dong)齒(chi)(chi)輪(lun)(lun)不轉，在“2”位置(zhi)(zhi)時(shi)啟(qi)(qi)動(dong)(dong)(dong)電機(ji)驅動(dong)(dong)(dong)齒(chi)(chi)輪(lun)(lun)與(yu)飛(fei)輪(lun)(lun)齒(chi)(chi)圈嚙合(he)一(yi)起轉動(dong)(dong)(dong)。

6、啟(qi)動開(kai)關(guan)轉到啟(qi)動位置發動機不能啟(qi)動，也無其他現象。這種(zhong)故障，一是(shi)鑰匙、開(kai)關(guan)因磨損而未(wei)接(jie)通(tong)(tong)啟(qi)動電(dian)(dian)路；二是(shi)啟(qi)動機繼電(dian)(dian)器(qi)未(wei)接(jie)通(tong)(tong)啟(qi)動機電(dian)(dian)磁開(kai)關(guan)電(dian)(dian)路；三是(shi)電(dian)(dian)源開(kai)關(guan)未(wei)接(jie)通(tong)(tong)主電(dian)(dian)路。

7、啟(qi)動(dong)時(shi)只有(you)輕微“嗒(da)”的一聲(sheng)，再無任(ren)何反應(ying)，這是啟(qi)動(dong)繼電器發(fa)卡所致。這時(shi)只要按(an)一下電磁鐵尾部，迫使電磁鐵前(qian)移，即可將啟(qi)動(dong)電路接通，從而(er)使發(fa)動(dong)機啟(qi)動(dong)。