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)(liu)(liu)(liu)限壓(ya)(ya)(ya)大(da)功(gong)率(lv)蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)可(ke)(ke)以(yi)(yi)對(dui)48伏(fu)以(yi)(yi)下的(de)(de)(de)蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)進行快(kuai)速(su)全自動(dong)(dong)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)功(gong)率(lv)最(zui)大(da)可(ke)(ke)以(yi)(yi)達到(dao)600瓦。STK702-015是一(yi)(yi)(yi)片功(gong)能強大(da)的(de)(de)(de)大(da)規(gui)模(mo)厚(hou)膜開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，內含輔(fu)(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)、PWM控(kong)制、輸(shu)(shu)出(chu)驅(qu)(qu)動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)、功(gong)率(lv)場效應管輸(shu)(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)等。它和(he)簡單而(er)且專(zhuan)用的(de)(de)(de)外(wai)圍電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)一(yi)(yi)(yi)起組成性能可(ke)(ke)靠(kao)的(de)(de)(de)開(kai)(kai)關(guan)(guan)穩壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。交流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)通過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)濾波器后分成兩(liang)路(lu)(lu)(lu)：一(yi)(yi)(yi)路(lu)(lu)(lu)經整(zheng)流(liu)(liu)(liu)(liu)(liu)濾波后供給PWM脈(mo)(mo)寬控(kong)制驅(qu)(qu)動(dong)(dong)模(mo)塊(kuai)STK702-015的(de)(de)(de)31、32腳，內部PWM開(kai)(kai)始工作(zuo)，產生70KHZ的(de)(de)(de)開(kai)(kai)關(guan)(guan)信號并(bing)驅(qu)(qu)動(dong)(dong)功(gong)率(lv)場效應管作(zuo)強勁的(de)(de)(de)D類放大(da)后由(you)(you)25、26腳輸(shu)(shu)出(chu)，經過(guo)(guo)特殊的(de)(de)(de)LC電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)推動(dong)(dong)高頻變壓(ya)(ya)(ya)器工作(zuo)，經次(ci)級(ji)降壓(ya)(ya)(ya)后由(you)(you)快(kuai)恢復二極管MOR3040PT半波整(zheng)流(liu)(liu)(liu)(liu)(liu)后輸(shu)(shu)出(chu)，這里沒(mei)有濾波電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)，這和(he)普通的(de)(de)(de)開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)有些區別，理論和(he)實(shi)踐告訴我們：脈(mo)(mo)動(dong)(dong)直(zhi)流(liu)(liu)(liu)(liu)(liu)比平滑的(de)(de)(de)直(zhi)流(liu)(liu)(liu)(liu)(liu)對(dui)蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)效果更好(hao)，而(er)本機(ji)的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)脈(mo)(mo)沖頻率(lv)高達70KHZ，所以(yi)(yi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)效果更好(hao)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)速(su)度更快(kuai)。300伏(fu)直(zhi)流(liu)(liu)(liu)(liu)(liu)另一(yi)(yi)(yi)路(lu)(lu)(lu)向輔(fu)(fu)助開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)供電(dian)(dian)(dian)(dian)(dian)(dian)，輔(fu)(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)輸(shu)(shu)出(chu)的(de)(de)(de)直(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)通過(guo)(guo)一(yi)(yi)(yi)個開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)后給PWM脈(mo)(mo)寬控(kong)制驅(qu)(qu)動(dong)(dong)模(mo)塊(kuai)提供直(zhi)流(liu)(liu)(liu)(liu)(liu)工作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(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(neng)電器(qi)設備有限公(gong)司始(shi)建于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(shi)能(neng)電器(qi)設備有限公(gong)司始(shi)建于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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