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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:
  本機可(ke)以對48伏以下的(de)(de)(de)蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)池進行快速全(quan)自動充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian),充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)機功率(lv)最大可(ke)以達(da)到600瓦。STK702-015是一(yi)片功能強大的(de)(de)(de)大規模(mo)(mo)厚(hou)膜開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu),內含輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)、PWM控(kong)制(zhi)、輸(shu)出(chu)驅動電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)、功率(lv)場效(xiao)應(ying)管(guan)輸(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)等。它和簡單(dan)而且專用的(de)(de)(de)外圍電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)一(yi)起組成(cheng)性能可(ke)靠的(de)(de)(de)開(kai)關(guan)穩壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)通過電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)濾波(bo)(bo)器(qi)后(hou)(hou)分成(cheng)兩路(lu)(lu):一(yi)路(lu)(lu)經整(zheng)流(liu)(liu)濾波(bo)(bo)后(hou)(hou)供給PWM脈(mo)寬控(kong)制(zhi)驅動模(mo)(mo)塊STK702-015的(de)(de)(de)31、32腳(jiao),內部(bu)PWM開(kai)始工作,產生70KHZ的(de)(de)(de)開(kai)關(guan)信號并驅動功率(lv)場效(xiao)應(ying)管(guan)作強勁的(de)(de)(de)D類(lei)放大后(hou)(hou)由25、26腳(jiao)輸(shu)出(chu),經過特殊的(de)(de)(de)LC電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)推(tui)動高頻變壓(ya)器(qi)工作,經次級降壓(ya)后(hou)(hou)由快恢(hui)復二極管(guan)MOR3040PT半波(bo)(bo)整(zheng)流(liu)(liu)后(hou)(hou)輸(shu)出(chu),這(zhe)里沒(mei)有(you)濾波(bo)(bo)電(dian)(dian)(dian)(dian)(dian)(dian)容,這(zhe)和普通的(de)(de)(de)開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)有(you)些區別(bie),理論和實踐告訴我們:脈(mo)動直(zhi)流(liu)(liu)比平滑的(de)(de)(de)直(zhi)流(liu)(liu)對蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)池的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)果更(geng)(geng)好,而本機的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)脈(mo)沖頻率(lv)高達(da)70KHZ,所以充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)果更(geng)(geng)好,充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)速度更(geng)(geng)快。300伏直(zhi)流(liu)(liu)另一(yi)路(lu)(lu)向輔(fu)助開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)供電(dian)(dian)(dian)(dian)(dian)(dian),輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)輸(shu)出(chu)的(de)(de)(de)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)通過一(yi)個開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)后(hou)(hou)給PWM脈(mo)寬控(kong)制(zhi)驅動模(mo)(mo)塊提供直(zhi)流(liu)(liu)工作電(dian)(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)施能電器設備(bei)有限(xian)公(gong)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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