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大功率充電機電路

2019/3/13 13:03:54??????點擊：

　　大(da)(da)功率充電(dian)(dian)(dian)(dian)機(ji)電(dian)(dian)(dian)(dian)路(lu)工(gong)作(zuo)原理：220V市電(dian)(dian)(dian)(dian)經變壓(ya)器降壓(ya)，橋堆整(zheng)流(liu)(liu)，C1、C2濾波后得到(dao)35V的(de)脈動直流(liu)(liu)電(dian)(dian)(dian)(dian)壓(ya)，從IC的(de)第(di)(di)1、2腳(jiao)輸入(ru)，該IC最高輸人(ren)電(dian)(dian)(dian)(dian)壓(ya)可達40V。輸人(ren)的(de)電(dian)(dian)(dian)(dian)壓(ya)經IC內部的(de)振蕩(dang)調(diao)制為(wei)200kHz左(zuo)右的(de)開(kai)關(guan)電(dian)(dian)(dian)(dian)壓(ya)，其內部的(de)振蕩(dang)電(dian)(dian)(dian)(dian)壓(ya)和頻(pin)率由(you)第(di)(di)3腳(jiao)的(de)外(wai)接電(dian)(dian)(dian)(dian)容所決定。第(di)(di)4腳(jiao)為(wei)抑制端，其閉鎖電(dian)(dian)(dian)(dian)壓(ya)的(de)閾(yu)值為(wei)0.7V，輸出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)經采(cai)樣電(dian)(dian)(dian)(dian)壓(ya)R2反饋至第(di)(di)4腳(jiao)后與R1比較，當閾(yu)值電(dian)(dian)(dian)(dian)壓(ya)大(da)(da)于0．7V時，輸出(chu)(chu)(chu)關(guan)斷，起到(dao)短路(lu)過(guo)電(dian)(dian)(dian)(dian)流(liu)(liu)保護作(zuo)用。第(di)(di)6腳(jiao)為(wei)輸出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)調(diao)節端，由(you)電(dian)(dian)(dian)(dian)位(wei)器RP及電(dian)(dian)(dian)(dian)阻R4將輸出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)分壓(ya)后得到(dao)調(diao)節電(dian)(dian)(dian)(dian)壓(ya)。第(di)(di)7腳(jiao)所接R3、C6為(wei)環路(lu)調(diao)節放(fang)大(da)(da)器的(de)頻(pin)率補償電(dian)(dian)(dian)(dian)路(lu)。第(di)(di)8腳(jiao)為(wei)輸出(chu)(chu)(chu)端，由(you)晶體(ti)管V將電(dian)(dian)(dian)(dian)流(liu)(liu)進行擴大(da)(da)輸出(chu)(chu)(chu)。VD為(wei)反向續流(liu)(liu)二(er)極管。L為(wei)市售的(de)電(dian)(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(neng)電器設(she)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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