恒流限壓大功率蓄電池充電機方案
2019/4/3 9:04:57??????點擊：
恒(heng)流(liu)限壓(ya)大功率蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機可(ke)以對48伏以下的(de)蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池進行快速(su)全自(zi)動(dong)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)功率最大可(ke)以達到600瓦。STK702-015是一(yi)(yi)片功能(neng)強大的(de)大規模厚膜開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，內含輔助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)、PWM控制、輸(shu)出驅(qu)動(dong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)、功率場(chang)效(xiao)(xiao)應(ying)管輸(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)等。它(ta)和(he)簡單而(er)且專用的(de)外圍電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)一(yi)(yi)起組成性能(neng)可(ke)靠的(de)開(kai)(kai)關(guan)(guan)穩壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)通過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)濾(lv)波(bo)器(qi)后分(fen)成兩路(lu)(lu)(lu)：一(yi)(yi)路(lu)(lu)(lu)經整(zheng)流(liu)濾(lv)波(bo)后供(gong)給PWM脈(mo)寬控制驅(qu)動(dong)模塊STK702-015的(de)31、32腳(jiao)，內部PWM開(kai)(kai)始工(gong)作，產(chan)生70KHZ的(de)開(kai)(kai)關(guan)(guan)信號并驅(qu)動(dong)功率場(chang)效(xiao)(xiao)應(ying)管作強勁(jing)的(de)D類放大后由25、26腳(jiao)輸(shu)出，經過(guo)特殊(shu)的(de)LC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)推動(dong)高(gao)頻(pin)變壓(ya)器(qi)工(gong)作，經次級降壓(ya)后由快恢復二極(ji)管MOR3040PT半波(bo)整(zheng)流(liu)后輸(shu)出，這里沒(mei)有(you)濾(lv)波(bo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)，這和(he)普通的(de)開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)有(you)些區別(bie)，理論和(he)實踐告訴我們(men)：脈(mo)動(dong)直流(liu)比平滑的(de)直流(liu)對蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池的(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)(xiao)果更好(hao)，而(er)本機的(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)脈(mo)沖(chong)頻(pin)率高(gao)達70KHZ，所以充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)(xiao)果更好(hao)，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)速(su)度更快。300伏直流(liu)另一(yi)(yi)路(lu)(lu)(lu)向(xiang)輔助(zhu)開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，輔助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)輸(shu)出的(de)直流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)通過(guo)一(yi)(yi)個(ge)開(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)后給PWM脈(mo)寬控制驅(qu)動(dong)模塊提供(gong)直流(liu)工(gong)作電(dian)(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(shang)海施能(neng)電器設備有限公(gong)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(shang)海施能(neng)電器設備有限公(gong)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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