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)流限(xian)壓(ya)大功(gong)率(lv)(lv)蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機可(ke)以對48伏(fu)以下的(de)(de)(de)蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)進行快(kuai)速全(quan)自動充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)功(gong)率(lv)(lv)最(zui)大可(ke)以達到600瓦。STK702-015是一片功(gong)能強大的(de)(de)(de)大規模厚膜開(kai)(kai)(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，內含輔(fu)助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)、PWM控制(zhi)、輸(shu)(shu)出驅(qu)動電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)、功(gong)率(lv)(lv)場效應(ying)管輸(shu)(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)等(deng)。它和簡單而且(qie)專用的(de)(de)(de)外圍電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)一起組(zu)成(cheng)性(xing)能可(ke)靠的(de)(de)(de)開(kai)(kai)(kai)(kai)關(guan)穩壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)。交流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)通(tong)(tong)過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)濾波(bo)器(qi)后分成(cheng)兩路(lu)：一路(lu)經整(zheng)流濾波(bo)后供給(gei)(gei)PWM脈(mo)寬控制(zhi)驅(qu)動模塊(kuai)STK702-015的(de)(de)(de)31、32腳，內部PWM開(kai)(kai)(kai)(kai)始工作(zuo)(zuo)(zuo)，產生70KHZ的(de)(de)(de)開(kai)(kai)(kai)(kai)關(guan)信號(hao)并驅(qu)動功(gong)率(lv)(lv)場效應(ying)管作(zuo)(zuo)(zuo)強勁的(de)(de)(de)D類放大后由25、26腳輸(shu)(shu)出，經過特殊的(de)(de)(de)LC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)推動高(gao)(gao)頻變壓(ya)器(qi)工作(zuo)(zuo)(zuo)，經次級降壓(ya)后由快(kuai)恢(hui)復二極管MOR3040PT半波(bo)整(zheng)流后輸(shu)(shu)出，這(zhe)里沒有濾波(bo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容，這(zhe)和普通(tong)(tong)的(de)(de)(de)開(kai)(kai)(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)有些區別，理論和實踐(jian)告訴(su)我(wo)們：脈(mo)動直(zhi)流比平滑(hua)的(de)(de)(de)直(zhi)流對蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效果更好，而本機的(de)(de)(de)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)脈(mo)沖頻率(lv)(lv)高(gao)(gao)達70KHZ，所以充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效果更好，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)速度更快(kuai)。300伏(fu)直(zhi)流另一路(lu)向輔(fu)助(zhu)開(kai)(kai)(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，輔(fu)助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)輸(shu)(shu)出的(de)(de)(de)直(zhi)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)通(tong)(tong)過一個(ge)開(kai)(kai)(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)后給(gei)(gei)PWM脈(mo)寬控制(zhi)驅(qu)動模塊(kuai)提供直(zhi)流工作(zuo)(zuo)(zuo)電(dian)(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。上海施能電器設備有限公(gong)司始建于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。上海施能電器設備有限公(gong)司始建于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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