48伏以下的蓄電池進行快速全自動充電機的工作原理
2019/4/16 9:16:25??????點擊：
本機(ji)可(ke)以(yi)對(dui)48伏以(yi)下的(de)(de)(de)(de)(de)蓄電(dian)(dian)(dian)(dian)(dian)池(chi)進行快(kuai)速全自動(dong)(dong)充(chong)電(dian)(dian)(dian)(dian)(dian)，充(chong)電(dian)(dian)(dian)(dian)(dian)機(ji)功(gong)率最大可(ke)以(yi)達到600瓦(wa)。STK702-015是一片功(gong)能強(qiang)大的(de)(de)(de)(de)(de)大規模(mo)厚膜開(kai)(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)路(lu)，內(nei)含輔(fu)助電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)、PWM控制(zhi)、輸(shu)出(chu)驅(qu)動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)路(lu)、功(gong)率場(chang)效應(ying)管(guan)輸(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)路(lu)等(deng)。它(ta)和簡單(dan)而且專用的(de)(de)(de)(de)(de)外圍電(dian)(dian)(dian)(dian)(dian)路(lu)一起組(zu)成(cheng)性能可(ke)靠的(de)(de)(de)(de)(de)開(kai)(kai)(kai)關(guan)穩壓(ya)電(dian)(dian)(dian)(dian)(dian)路(lu)。交流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)通(tong)過電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)濾波(bo)器后(hou)分成(cheng)兩(liang)路(lu)：一路(lu)經(jing)整流(liu)(liu)(liu)濾波(bo)后(hou)供給PWM脈(mo)寬控制(zhi)驅(qu)動(dong)(dong)模(mo)塊STK702-015的(de)(de)(de)(de)(de)31、32腳，內(nei)部PWM開(kai)(kai)(kai)始工(gong)(gong)作，產生70KHZ的(de)(de)(de)(de)(de)開(kai)(kai)(kai)關(guan)信號并驅(qu)動(dong)(dong)功(gong)率場(chang)效應(ying)管(guan)作強(qiang)勁的(de)(de)(de)(de)(de)D類放大后(hou)由25、26腳輸(shu)出(chu)，經(jing)過特殊(shu)的(de)(de)(de)(de)(de)LC電(dian)(dian)(dian)(dian)(dian)路(lu)推動(dong)(dong)高頻變壓(ya)器工(gong)(gong)作，經(jing)次(ci)級降壓(ya)后(hou)由快(kuai)恢復(fu)二極管(guan)MOR3040PT半波(bo)整流(liu)(liu)(liu)后(hou)輸(shu)出(chu)，這里沒有濾波(bo)電(dian)(dian)(dian)(dian)(dian)容，這和普通(tong)的(de)(de)(de)(de)(de)開(kai)(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)有些區別，理論和實(shi)踐(jian)告訴我們：脈(mo)動(dong)(dong)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)比(bi)平滑的(de)(de)(de)(de)(de)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)對(dui)蓄電(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)(de)(de)充(chong)電(dian)(dian)(dian)(dian)(dian)效果(guo)更好(hao)，而本機(ji)的(de)(de)(de)(de)(de)充(chong)電(dian)(dian)(dian)(dian)(dian)脈(mo)沖頻率高達70KHZ，所以(yi)充(chong)電(dian)(dian)(dian)(dian)(dian)效果(guo)更好(hao)，充(chong)電(dian)(dian)(dian)(dian)(dian)速度(du)更快(kuai)。300伏直(zhi)(zhi)(zhi)流(liu)(liu)(liu)另一路(lu)向輔(fu)助開(kai)(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)供電(dian)(dian)(dian)(dian)(dian)，輔(fu)助電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)出(chu)的(de)(de)(de)(de)(de)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)通(tong)過一個開(kai)(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)路(lu)后(hou)給PWM脈(mo)寬控制(zhi)驅(qu)動(dong)(dong)模(mo)塊提供直(zhi)(zhi)(zhi)流(liu)(liu)(liu)工(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)壓(ya)。
當開始充電時，蓄電池的電壓較低，與充電機的壓差較大，初始充電電流很大，如果不加以限制，可能會損壞蓄電池和充電機，所以本機中由LM358的一個運放和電流取樣電阻組成一個自動限流電路，當充電電流超過設定的值時（例如10安培）電流取樣電阻上的壓降使LM358的一個運放輸出低電平，控制PWM脈寬控制驅動模塊STK702-015輸出的脈沖寬度變窄，從而輸出電壓降低，充電電流減小。當蓄電池充滿后（一般充滿后的蓄電池電壓為標稱電壓的1.3倍）LM358的另一個運放組成的電壓比較器輸出低電平，這時綠色發光二極管點亮，同時切斷PWM脈寬控制驅動模塊的直流工作電壓。表示充電完成，此時的充電機只有輔助電源供電，功耗很小。上海(hai)施能電器(qi)設(she)備有限公司始建于1984年(nian)，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。
當開始充電時，蓄電池的電壓較低，與充電機的壓差較大，初始充電電流很大，如果不加以限制，可能會損壞蓄電池和充電機，所以本機中由LM358的一個運放和電流取樣電阻組成一個自動限流電路，當充電電流超過設定的值時（例如10安培）電流取樣電阻上的壓降使LM358的一個運放輸出低電平，控制PWM脈寬控制驅動模塊STK702-015輸出的脈沖寬度變窄，從而輸出電壓降低，充電電流減小。當蓄電池充滿后（一般充滿后的蓄電池電壓為標稱電壓的1.3倍）LM358的另一個運放組成的電壓比較器輸出低電平，這時綠色發光二極管點亮，同時切斷PWM脈寬控制驅動模塊的直流工作電壓。表示充電完成，此時的充電機只有輔助電源供電，功耗很小。上海(hai)施能電器(qi)設(she)備有限公司始建于1984年(nian)，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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