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(ben)機(ji)可以(yi)(yi)(yi)對(dui)48伏以(yi)(yi)(yi)下的(de)(de)(de)(de)蓄電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)進行(xing)快速全自動(dong)充電(dian)(dian)(dian)(dian)(dian)(dian)，充電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)功(gong)(gong)率最大可以(yi)(yi)(yi)達到600瓦。STK702-015是一(yi)片功(gong)(gong)能強大的(de)(de)(de)(de)大規模厚膜開(kai)(kai)(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)，內含輔(fu)助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)、PWM控制、輸(shu)出(chu)驅動(dong)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)、功(gong)(gong)率場效(xiao)應管(guan)輸(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)等。它(ta)和(he)簡(jian)單而且專用的(de)(de)(de)(de)外圍電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)一(yi)起組成性能可靠的(de)(de)(de)(de)開(kai)(kai)(kai)(kai)關(guan)(guan)穩壓(ya)(ya)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)。交流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)通過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)濾波(bo)器(qi)后(hou)分成兩(liang)路(lu)(lu)(lu)(lu)：一(yi)路(lu)(lu)(lu)(lu)經(jing)整(zheng)流(liu)(liu)(liu)濾波(bo)后(hou)供(gong)(gong)給PWM脈寬控制驅動(dong)模塊(kuai)STK702-015的(de)(de)(de)(de)31、32腳，內部(bu)PWM開(kai)(kai)(kai)(kai)始工(gong)作(zuo)(zuo)，產生70KHZ的(de)(de)(de)(de)開(kai)(kai)(kai)(kai)關(guan)(guan)信號(hao)并驅動(dong)功(gong)(gong)率場效(xiao)應管(guan)作(zuo)(zuo)強勁的(de)(de)(de)(de)D類放大后(hou)由25、26腳輸(shu)出(chu)，經(jing)過(guo)(guo)特殊的(de)(de)(de)(de)LC電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)推(tui)動(dong)高(gao)頻(pin)變壓(ya)(ya)器(qi)工(gong)作(zuo)(zuo)，經(jing)次級降壓(ya)(ya)后(hou)由快恢(hui)復二極(ji)管(guan)MOR3040PT半波(bo)整(zheng)流(liu)(liu)(liu)后(hou)輸(shu)出(chu)，這(zhe)(zhe)里沒有(you)濾波(bo)電(dian)(dian)(dian)(dian)(dian)(dian)容，這(zhe)(zhe)和(he)普(pu)通的(de)(de)(de)(de)開(kai)(kai)(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)有(you)些區(qu)別，理論和(he)實踐告訴我們：脈動(dong)直(zhi)流(liu)(liu)(liu)比平滑(hua)的(de)(de)(de)(de)直(zhi)流(liu)(liu)(liu)對(dui)蓄電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)(de)充電(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)果更(geng)好(hao)，而本(ben)機(ji)的(de)(de)(de)(de)充電(dian)(dian)(dian)(dian)(dian)(dian)脈沖頻(pin)率高(gao)達70KHZ，所以(yi)(yi)(yi)充電(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)果更(geng)好(hao)，充電(dian)(dian)(dian)(dian)(dian)(dian)速度(du)更(geng)快。300伏直(zhi)流(liu)(liu)(liu)另一(yi)路(lu)(lu)(lu)(lu)向輔(fu)助(zhu)開(kai)(kai)(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)，輔(fu)助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)出(chu)的(de)(de)(de)(de)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)通過(guo)(guo)一(yi)個開(kai)(kai)(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)后(hou)給PWM脈寬控制驅動(dong)模塊(kuai)提供(gong)(gong)直(zhi)流(liu)(liu)(liu)工(gong)作(zuo)(zuo)電(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)能電器設備(bei)有限(xian)公司(si)始建(jian)于(yu)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。上海施(shi)能電器設備(bei)有限(xian)公司(si)始建(jian)于(yu)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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