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大功率充電機電路

2019/3/13 13:03:54??????點擊:
  大功率充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)機電(dian)(dian)(dian)(dian)(dian)(dian)路工作(zuo)(zuo)原理:220V市電(dian)(dian)(dian)(dian)(dian)(dian)經變壓(ya)(ya)(ya)(ya)(ya)器(qi)降壓(ya)(ya)(ya)(ya)(ya),橋堆整流,C1、C2濾(lv)波后(hou)得到(dao)35V的(de)(de)(de)(de)脈動直流電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya),從IC的(de)(de)(de)(de)第1、2腳輸(shu)(shu)入(ru),該(gai)IC最高輸(shu)(shu)人(ren)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)可達40V。輸(shu)(shu)人(ren)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)經IC內(nei)部的(de)(de)(de)(de)振蕩調(diao)制為(wei)200kHz左右的(de)(de)(de)(de)開關電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya),其內(nei)部的(de)(de)(de)(de)振蕩電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)和(he)頻率由(you)(you)第3腳的(de)(de)(de)(de)外(wai)接電(dian)(dian)(dian)(dian)(dian)(dian)容所決(jue)定。第4腳為(wei)抑制端,其閉鎖電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)閾值為(wei)0.7V,輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)經采樣電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)R2反饋至第4腳后(hou)與R1比較,當閾值電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)大于0.7V時,輸(shu)(shu)出(chu)(chu)關斷(duan),起到(dao)短路過電(dian)(dian)(dian)(dian)(dian)(dian)流保護作(zuo)(zuo)用(yong)。第6腳為(wei)輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)調(diao)節(jie)端,由(you)(you)電(dian)(dian)(dian)(dian)(dian)(dian)位器(qi)RP及電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)R4將輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)分壓(ya)(ya)(ya)(ya)(ya)后(hou)得到(dao)調(diao)節(jie)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)。第7腳所接R3、C6為(wei)環(huan)路調(diao)節(jie)放大器(qi)的(de)(de)(de)(de)頻率補償電(dian)(dian)(dian)(dian)(dian)(dian)路。第8腳為(wei)輸(shu)(shu)出(chu)(chu)端,由(you)(you)晶(jing)體管(guan)V將電(dian)(dian)(dian)(dian)(dian)(dian)流進行(xing)擴大輸(shu)(shu)出(chu)(chu)。VD為(wei)反向續流二極管(guan)。L為(wei)市售的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)感器(qi)。
  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(shang)海施能電器設備有限公司始建于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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