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(fu)(fu)以下(xia)的蓄電(dian)(dian)(dian)(dian)(dian)(dian)池進行快速(su)全自(zi)動充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)功率最(zui)大可以達到600瓦。STK702-015是一片功能強大的大規模厚(hou)膜開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，內(nei)含輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)、PWM控(kong)(kong)制、輸(shu)(shu)(shu)(shu)出驅(qu)(qu)動電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)、功率場(chang)效(xiao)應管輸(shu)(shu)(shu)(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)等。它和(he)簡單而且專用的外圍(wei)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)一起組成(cheng)性能可靠的開(kai)關(guan)穩壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。交流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)通(tong)過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)濾(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)后分成(cheng)兩路(lu)(lu)(lu)：一路(lu)(lu)(lu)經整(zheng)流(liu)(liu)濾(lv)(lv)(lv)波(bo)(bo)(bo)后供(gong)(gong)給(gei)PWM脈寬控(kong)(kong)制驅(qu)(qu)動模塊STK702-015的31、32腳(jiao)，內(nei)部PWM開(kai)始工(gong)作(zuo)，產(chan)生70KHZ的開(kai)關(guan)信(xin)號并驅(qu)(qu)動功率場(chang)效(xiao)應管作(zuo)強勁的D類(lei)放大后由(you)25、26腳(jiao)輸(shu)(shu)(shu)(shu)出，經過(guo)特殊的LC電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)推動高(gao)(gao)頻變壓(ya)器(qi)工(gong)作(zuo)，經次級降壓(ya)后由(you)快恢復(fu)二極(ji)管MOR3040PT半波(bo)(bo)(bo)整(zheng)流(liu)(liu)后輸(shu)(shu)(shu)(shu)出，這(zhe)里沒有濾(lv)(lv)(lv)波(bo)(bo)(bo)電(dian)(dian)(dian)(dian)(dian)(dian)容，這(zhe)和(he)普通(tong)的開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)有些(xie)區別，理論和(he)實(shi)踐告(gao)訴我們：脈動直流(liu)(liu)比平(ping)滑的直流(liu)(liu)對蓄電(dian)(dian)(dian)(dian)(dian)(dian)池的充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)果更好(hao)，而本機(ji)的充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)脈沖頻率高(gao)(gao)達70KHZ，所以充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)果更好(hao)，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)速(su)度更快。300伏(fu)(fu)直流(liu)(liu)另一路(lu)(lu)(lu)向輔(fu)助開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)，輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)(shu)(shu)(shu)出的直流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)通(tong)過(guo)一個開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)后給(gei)PWM脈寬控(kong)(kong)制驅(qu)(qu)動模塊提供(gong)(gong)直流(liu)(liu)工(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(neng)電器設備有限公(gong)司始建于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。上海施能(neng)電器設備有限公(gong)司始建于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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