一、電動車電機功率怎么看

1、國家(jia)標(biao)準規定電(dian)動車電(dian)機功(gong)率(lv)不得大于(yu)400W。

2、電機上(shang)一般不會寫功率，只能(neng)看說明書(shu)或(huo)向銷售人員(yuan)或(huo)廠家咨詢(xun)。

3、一般電動(dong)(dong)車(che)電機功(gong)率有350w、450w、500w、最高(gao)的800w，很多64v的電動(dong)(dong)車(che)，大(da)部(bu)分是(shi)350w。如果輪(lun)胎是(shi)300—10（跟摩托車(che)輪(lun)轂直(zhi)徑(jing)和(he)寬度一樣）的話(hua)，那個叫電動(dong)(dong)摩托車(che)，那就是(shi)500w至800w電機。

二、電動車電機的工作原理

電(dian)(dian)(dian)動(dong)車電(dian)(dian)(dian)機是把(ba)電(dian)(dian)(dian)能轉(zhuan)(zhuan)換成機械能的一種設備。它是利用通電(dian)(dian)(dian)線(xian)圈(quan)（也就是定子繞組）產生(sheng)旋(xuan)轉(zhuan)(zhuan)磁(ci)(ci)場并作用于轉(zhuan)(zhuan)子鼠籠式(shi)式(shi)閉合(he)鋁框形成磁(ci)(ci)電(dian)(dian)(dian)動(dong)力(li)旋(xuan)轉(zhuan)(zhuan)扭矩。

電(dian)(dian)動車電(dian)(dian)機(ji)按使用(yong)電(dian)(dian)源不同分為直(zhi)流電(dian)(dian)動機(ji)和(he)交(jiao)流電(dian)(dian)動機(ji)，電(dian)(dian)力系統(tong)中(zhong)的(de)電(dian)(dian)動機(ji)大部(bu)分是(shi)(shi)交(jiao)流電(dian)(dian)機(ji)，可以是(shi)(shi)同步(bu)電(dian)(dian)機(ji)或者(zhe)是(shi)(shi)異步(bu)電(dian)(dian)機(ji)（電(dian)(dian)機(ji)定子磁(ci)場(chang)轉(zhuan)速與(yu)轉(zhuan)子旋轉(zhuan)轉(zhuan)速不保持同步(bu)速）。電(dian)(dian)動機(ji)主要由(you)定子與(yu)轉(zhuan)子組成，通電(dian)(dian)導線在磁(ci)場(chang)中(zhong)受(shou)力運(yun)動的(de)方(fang)向(xiang)跟電(dian)(dian)流方(fang)向(xiang)和(he)磁(ci)感(gan)線（磁(ci)場(chang)方(fang)向(xiang)）方(fang)向(xiang)有(you)關。電(dian)(dian)動機(ji)工作原(yuan)理是(shi)(shi)磁(ci)場(chang)對電(dian)(dian)流受(shou)力的(de)作用(yong)，使電(dian)(dian)動機(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)機(ji)(ji)一切正常的情況下，啟(qi)(qi)(qi)動(dong)機(ji)(ji)或蓄電池有(you)故障(zhang)都會使(shi)發動(dong)機(ji)(ji)難以啟(qi)(qi)(qi)動(dong)，甚至不能啟(qi)(qi)(qi)動(dong)。遇此情況，首先要了解啟(qi)(qi)(qi)動(dong)機(ji)(ji)與(yu)蓄電池的使(shi)用(yong)情況，以便大致判(pan)斷故障(zhang)部位。若(ruo)蓄電池使(shi)用(yong)時間已經超(chao)過1年(nian)，應重點檢查其技術狀(zhuang)況；若(ruo)蓄電池使(shi)用(yong)時間較短，而(er)啟(qi)(qi)(qi)動(dong)機(ji)(ji)長時間未檢修，則(ze)應從(cong)啟(qi)(qi)(qi)動(dong)機(ji)(ji)查起(qi)。然后根據(ju)啟(qi)(qi)(qi)動(dong)時的故障(zhang)現象進行分析(xi)和處(chu)理：

1、啟(qi)動(dong)時只聽到(dao)啟(qi)動(dong)機電(dian)磁開關“咯(ge)咯(ge)”聲(sheng)，或首(shou)次(ci)啟(qi)動(dong)時啟(qi)動(dong)機帶動(dong)曲軸緩轉(zhuan)(zhuan)幾下，繼而出現啟(qi)動(dong)電(dian)磁開關“咯(ge)咯(ge)”響，但曲軸卻不轉(zhuan)(zhuan)動(dong)。此現象(xiang)一般屬于蓄(xu)電(dian)池“斷格”故障。

2、臨時(shi)停(ting)車每(mei)次都能啟(qi)動，但停(ting)車時(shi)間較長或第(di)二天啟(qi)動時(shi)卻(que)只能使(shi)曲軸轉一下。此現象屬于(yu)蓄(xu)電池(chi)自放電嚴重，其(qi)極板、隔(ge)板嚴重老化(hua)，說(shuo)明該蓄(xu)電池(chi)已經接近報廢。

3、啟(qi)動(dong)時啟(qi)動(dong)機(ji)突然轉動(dong)無力，并伴有燒(shao)橡膠氣味或蓄電池處有煙冒出，多屬極(ji)樁、極(ji)樁夾子(zi)接觸不良(liang)而發熱燒(shao)損。

4、若啟動(dong)(dong)(dong)時啟動(dong)(dong)(dong)機(ji)驅動(dong)(dong)(dong)齒(chi)(chi)輪(lun)與發動(dong)(dong)(dong)機(ji)飛輪(lun)齒(chi)(chi)圈(quan)發出撞擊(ji)的空轉聲，其原因(yin)有(you)二：一是飛輪(lun)齒(chi)(chi)圈(quan)的嚙合切入(ru)面變形(xing)；二是啟動(dong)(dong)(dong)機(ji)驅動(dong)(dong)(dong)齒(chi)(chi)輪(lun)與飛輪(lun)齒(chi)(chi)圈(quan)的間隙太大(da)。兩者無法(fa)嚙合，發動(dong)(dong)(dong)機(ji)也就不能啟動(dong)(dong)(dong)。

5、電(dian)源總開(kai)(kai)(kai)關一(yi)接(jie)通，啟動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)驅(qu)動(dong)(dong)(dong)(dong)齒(chi)輪(lun)(lun)(lun)就和(he)飛輪(lun)(lun)(lun)齒(chi)圈嚙(nie)合在(zai)一(yi)起轉(zhuan)動(dong)(dong)(dong)(dong)。出現這種(zhong)故障(zhang)，一(yi)是啟動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)電(dian)磁(ci)開(kai)(kai)(kai)關的保持線(xian)(xian)圈錯(cuo)接(jie)在(zai)了電(dian)源接(jie)線(xian)(xian)柱上(shang)；二是鑰匙開(kai)(kai)(kai)關上(shang)的3根線(xian)(xian)接(jie)錯(cuo)，判斷方法是：鑰匙在(zai)“0”位置時啟動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)驅(qu)動(dong)(dong)(dong)(dong)齒(chi)輪(lun)(lun)(lun)不轉(zhuan)，在(zai)“2”位置時啟動(dong)(dong)(dong)(dong)電(dian)機(ji)(ji)(ji)驅(qu)動(dong)(dong)(dong)(dong)齒(chi)輪(lun)(lun)(lun)與飛輪(lun)(lun)(lun)齒(chi)圈嚙(nie)合一(yi)起轉(zhuan)動(dong)(dong)(dong)(dong)。

6、啟(qi)動(dong)開(kai)關(guan)轉到啟(qi)動(dong)位置(zhi)發動(dong)機(ji)不能(neng)啟(qi)動(dong)，也無其(qi)他現象(xiang)。這種故障，一是鑰匙、開(kai)關(guan)因磨(mo)損而未接(jie)通啟(qi)動(dong)電(dian)路(lu)；二(er)是啟(qi)動(dong)機(ji)繼電(dian)器(qi)未接(jie)通啟(qi)動(dong)機(ji)電(dian)磁開(kai)關(guan)電(dian)路(lu)；三是電(dian)源開(kai)關(guan)未接(jie)通主電(dian)路(lu)。

7、啟(qi)動(dong)時(shi)只(zhi)有輕微“嗒(da)”的一(yi)聲，再無(wu)任何反應，這是啟(qi)動(dong)繼(ji)電器發卡所致(zhi)。這時(shi)只(zhi)要按(an)一(yi)下電磁鐵(tie)尾(wei)部，迫(po)使電磁鐵(tie)前(qian)移，即可將(jiang)啟(qi)動(dong)電路接通，從而(er)使發動(dong)機啟(qi)動(dong)。