電動車充電器故障檢修
YG-WY H型電動互輪車智能充電器有電壓輸(shu)出,但充不進(jin)去電。
根據故障現象,初步判斷電源輸人整流電路部分有故障,有可能是輸出電源插頭與充電插座接觸不良所致。用十字旋具將充電器的(de)(de)(de)4顆緊固螺(luo)釘拆下,打開上蓋。首先看到輸(shu)八(ba)整流電(dian)(dian)路申的(de)(de)(de)咆源(yuan)濾波電(dian)(dian)容C5(82 uF/400V)已炸裂、漏(lou)液。然(ran)后用(yong)萬(wan)用(yong)表(biao):“R*1”擋測量(liang)輸(shu)出電(dian)(dian)源(yuan)插(cha)(cha)頭和(he)(he)充(chong)(chong)(chong)電(dian)(dian)插(cha)(cha)座,發現阻值很小,幾乎為(wei)0Ω,這(zhe)說明(ming)它們(men)接觸良好(hao)。為(wei)了萬(wan)無一失(shi),再(zai)用(yong)萬(wan)用(yong)表(biao)測量(liang)其(qi)他易損壞的(de)(de)(de)元件及充(chong)(chong)(chong)電(dian)(dian)保險管,相關的(de)(de)(de)電(dian)(dian)路圖(tu)如圖(tu)1 所示。經(jing)測量(liang)均未損壞。最后換(huan)上一個與原(yuan)(yuan)來的(de)(de)(de)耐(nai)壓(耐(nai)壓可大(da)于原(yuan)(yuan)來的(de)(de)(de)值,但絕對不能小于原(yuan)(yuan)來的(de)(de)(de)值)和(he)(he)容量(liang)相同的(de)(de)(de)電(dian)(dian)解電(dian)(dian)容(82 n F/400∨),焊好(hao),插(cha)(cha)上電(dian)(dian)源(yuan)插(cha)(cha)頭和(he)(he)充(chong)(chong)(chong)電(dian)(dian)插(cha)(cha)頭,經(jing)數小時(shi)的(de)(de)(de)充(chong)(chong)(chong)電(dian)(dian),充(chong)(chong)(chong)龜(gui)器(qi)上的(de)(de)(de)“充(chong)(chong)(chong)滿(man)(man)”指(zhi)示燈亮,表(biao)明(ming)蓄電(dian)(dian)池已充(chong)(chong)(chong)滿(man)(man),故障(zhang)排除。