恒流限壓大功率蓄電池充電機方案
2019/4/3 9:04:57??????點擊：
恒流(liu)(liu)限壓(ya)大(da)功率(lv)蓄電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)可(ke)以對48伏以下的(de)(de)(de)(de)(de)(de)(de)蓄電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)進行快(kuai)速全自動(dong)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)功率(lv)最(zui)大(da)可(ke)以達到600瓦。STK702-015是一(yi)片功能強大(da)的(de)(de)(de)(de)(de)(de)(de)大(da)規模厚膜開關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)，內含輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源、PWM控(kong)制(zhi)、輸(shu)出(chu)(chu)驅(qu)(qu)動(dong)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)、功率(lv)場(chang)效應管(guan)輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)等。它(ta)和簡單(dan)而且專用(yong)的(de)(de)(de)(de)(de)(de)(de)外(wai)圍電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)一(yi)起組(zu)成性能可(ke)靠的(de)(de)(de)(de)(de)(de)(de)開關(guan)穩(wen)壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源通(tong)過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)源濾(lv)(lv)波(bo)器后(hou)(hou)分成兩路(lu)(lu)：一(yi)路(lu)(lu)經整流(liu)(liu)濾(lv)(lv)波(bo)后(hou)(hou)供(gong)(gong)給(gei)PWM脈(mo)寬(kuan)控(kong)制(zhi)驅(qu)(qu)動(dong)模塊(kuai)STK702-015的(de)(de)(de)(de)(de)(de)(de)31、32腳(jiao)，內部PWM開始工(gong)(gong)作(zuo)，產(chan)生70KHZ的(de)(de)(de)(de)(de)(de)(de)開關(guan)信號并驅(qu)(qu)動(dong)功率(lv)場(chang)效應管(guan)作(zuo)強勁的(de)(de)(de)(de)(de)(de)(de)D類放大(da)后(hou)(hou)由(you)25、26腳(jiao)輸(shu)出(chu)(chu)，經過(guo)特(te)殊的(de)(de)(de)(de)(de)(de)(de)LC電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)推動(dong)高頻(pin)變(bian)壓(ya)器工(gong)(gong)作(zuo)，經次級降(jiang)壓(ya)后(hou)(hou)由(you)快(kuai)恢復二極管(guan)MOR3040PT半(ban)波(bo)整流(liu)(liu)后(hou)(hou)輸(shu)出(chu)(chu)，這里沒(mei)有濾(lv)(lv)波(bo)電(dian)(dian)(dian)(dian)(dian)(dian)容，這和普通(tong)的(de)(de)(de)(de)(de)(de)(de)開關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源有些區別(bie)，理論(lun)和實踐告訴我們：脈(mo)動(dong)直(zhi)(zhi)(zhi)流(liu)(liu)比平(ping)滑的(de)(de)(de)(de)(de)(de)(de)直(zhi)(zhi)(zhi)流(liu)(liu)對蓄電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)(de)(de)(de)(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)效果更好，而本機(ji)的(de)(de)(de)(de)(de)(de)(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)脈(mo)沖頻(pin)率(lv)高達70KHZ，所以充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)效果更好，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)速度更快(kuai)。300伏直(zhi)(zhi)(zhi)流(liu)(liu)另(ling)一(yi)路(lu)(lu)向輔(fu)助開關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)，輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源輸(shu)出(chu)(chu)的(de)(de)(de)(de)(de)(de)(de)直(zhi)(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)通(tong)過(guo)一(yi)個開關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)后(hou)(hou)給(gei)PWM脈(mo)寬(kuan)控(kong)制(zhi)驅(qu)(qu)動(dong)模塊(kuai)提供(gong)(gong)直(zhi)(zhi)(zhi)流(liu)(liu)工(gong)(gong)作(zuo)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。上海施能電(dian)器設備有限公司(si)始建于(yu)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。
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。上海施能電(dian)器設備有限公司(si)始建于(yu)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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