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大功率充電機電路

2019/3/13 13:03:54??????點擊:
  大(da)功率(lv)充(chong)電(dian)(dian)(dian)機電(dian)(dian)(dian)路工作原理:220V市(shi)電(dian)(dian)(dian)經變壓(ya)器降壓(ya),橋堆整流(liu)(liu)(liu),C1、C2濾波(bo)后(hou)(hou)(hou)得到(dao)35V的(de)(de)(de)脈動直流(liu)(liu)(liu)電(dian)(dian)(dian)壓(ya),從IC的(de)(de)(de)第(di)1、2腳(jiao)輸(shu)(shu)入,該IC最(zui)高輸(shu)(shu)人電(dian)(dian)(dian)壓(ya)可達40V。輸(shu)(shu)人的(de)(de)(de)電(dian)(dian)(dian)壓(ya)經IC內部的(de)(de)(de)振蕩(dang)調(diao)制為200kHz左右的(de)(de)(de)開(kai)關(guan)電(dian)(dian)(dian)壓(ya),其內部的(de)(de)(de)振蕩(dang)電(dian)(dian)(dian)壓(ya)和頻率(lv)由第(di)3腳(jiao)的(de)(de)(de)外接(jie)電(dian)(dian)(dian)容所(suo)決定。第(di)4腳(jiao)為抑(yi)制端(duan),其閉(bi)鎖電(dian)(dian)(dian)壓(ya)的(de)(de)(de)閾(yu)值為0.7V,輸(shu)(shu)出(chu)電(dian)(dian)(dian)壓(ya)經采樣電(dian)(dian)(dian)壓(ya)R2反饋至(zhi)第(di)4腳(jiao)后(hou)(hou)(hou)與R1比較,當(dang)閾(yu)值電(dian)(dian)(dian)壓(ya)大(da)于0.7V時(shi),輸(shu)(shu)出(chu)關(guan)斷,起(qi)到(dao)短路過電(dian)(dian)(dian)流(liu)(liu)(liu)保(bao)護作用。第(di)6腳(jiao)為輸(shu)(shu)出(chu)電(dian)(dian)(dian)壓(ya)調(diao)節端(duan),由電(dian)(dian)(dian)位器RP及電(dian)(dian)(dian)阻R4將(jiang)輸(shu)(shu)出(chu)電(dian)(dian)(dian)壓(ya)分壓(ya)后(hou)(hou)(hou)得到(dao)調(diao)節電(dian)(dian)(dian)壓(ya)。第(di)7腳(jiao)所(suo)接(jie)R3、C6為環路調(diao)節放大(da)器的(de)(de)(de)頻率(lv)補償電(dian)(dian)(dian)路。第(di)8腳(jiao)為輸(shu)(shu)出(chu)端(duan),由晶體管(guan)V將(jiang)電(dian)(dian)(dian)流(liu)(liu)(liu)進行(xing)擴(kuo)大(da)輸(shu)(shu)出(chu)。VD為反向續流(liu)(liu)(liu)二極管(guan)。L為市(shi)售的(de)(de)(de)電(dian)(dian)(dian)感器。
  大功率充電機元器件選擇:IC選用LA6350專用開關型穩壓集成電路,其外殼需接地并加一定的散熱器。橋堆電流應大于15A。電源變壓器用機床上的控制變壓器改制,容量一般在150W以上,變壓器的一次用φ0.27mm漆包線繞1200匝,二次用φlmm漆包線繞165匝即成。擴流晶體管V應選電流大于15A的大功率硅管,并加足夠的散熱片。VD用2CK10快速關斷型肖特基二極管。電阻R5的功率應在5W以上。集成塊第4腳所接電阻R1、R2精度要高,一定要用碳膜類。C3的漏電流要小。C4選用高頻瓷介電容。上海施能電器設備有(you)限公司始建于1984年,上海市高新技術企業,中國工業車輛優秀配套供應商,上海電器行業名優產品,主要生產工頻系列充電機,高頻系列充電機,鋰電池充電機,系列放電機,系列充放電機等電器產品。
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