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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(ji)可以對48伏以下的(de)蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)進行快(kuai)(kuai)速(su)全自動(dong)(dong)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian),充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)功(gong)(gong)(gong)率(lv)最大(da)可以達到(dao)600瓦(wa)。STK702-015是一片功(gong)(gong)(gong)能(neng)強大(da)的(de)大(da)規模厚(hou)膜開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu),內含輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)、PWM控制(zhi)、輸(shu)(shu)出(chu)驅(qu)動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)、功(gong)(gong)(gong)率(lv)場(chang)效應管(guan)輸(shu)(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)等。它和(he)簡單(dan)而(er)且(qie)專用的(de)外圍電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)一起組成(cheng)性能(neng)可靠的(de)開(kai)(kai)關(guan)穩壓(ya)(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。交流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)通過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)濾波器后分(fen)成(cheng)兩路(lu)(lu):一路(lu)(lu)經(jing)(jing)整流(liu)(liu)濾波后供給(gei)PWM脈寬控制(zhi)驅(qu)動(dong)(dong)模塊(kuai)STK702-015的(de)31、32腳(jiao),內部PWM開(kai)(kai)始工(gong)作(zuo),產生70KHZ的(de)開(kai)(kai)關(guan)信號并(bing)驅(qu)動(dong)(dong)功(gong)(gong)(gong)率(lv)場(chang)效應管(guan)作(zuo)強勁的(de)D類(lei)放大(da)后由25、26腳(jiao)輸(shu)(shu)出(chu),經(jing)(jing)過(guo)特殊的(de)LC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)推動(dong)(dong)高頻(pin)變(bian)壓(ya)(ya)器工(gong)作(zuo),經(jing)(jing)次級降(jiang)壓(ya)(ya)后由快(kuai)(kuai)恢復(fu)二極管(guan)MOR3040PT半波整流(liu)(liu)后輸(shu)(shu)出(chu),這里沒有(you)濾波電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容,這和(he)普通的(de)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)有(you)些(xie)區別,理(li)論和(he)實踐告訴(su)我們:脈動(dong)(dong)直(zhi)(zhi)流(liu)(liu)比平滑的(de)直(zhi)(zhi)流(liu)(liu)對蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效果更(geng)好,而(er)本機(ji)的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)脈沖頻(pin)率(lv)高達70KHZ,所(suo)以充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效果更(geng)好,充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)速(su)度更(geng)快(kuai)(kuai)。300伏直(zhi)(zhi)流(liu)(liu)另一路(lu)(lu)向(xiang)輔(fu)助開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian),輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)輸(shu)(shu)出(chu)的(de)直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)通過(guo)一個開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)后給(gei)PWM脈寬控制(zhi)驅(qu)動(dong)(dong)模塊(kuai)提供直(zhi)(zhi)流(liu)(liu)工(gong)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(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。上海施(shi)能電(dian)器設備有限公(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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