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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)(ya)大(da)功率(lv)(lv)蓄(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機可(ke)以(yi)對(dui)48伏(fu)以(yi)下的(de)(de)(de)蓄(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池進行快(kuai)速全自(zi)動(dong)(dong)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian),充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)功率(lv)(lv)最大(da)可(ke)以(yi)達到(dao)600瓦。STK702-015是一片(pian)功能強大(da)的(de)(de)(de)大(da)規模厚膜開關電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu),內(nei)(nei)含輔(fu)助(zhu)(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)、PWM控制(zhi)(zhi)、輸(shu)(shu)出驅(qu)(qu)動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)、功率(lv)(lv)場效(xiao)應(ying)管輸(shu)(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)等。它和簡單而(er)(er)且專用(yong)的(de)(de)(de)外(wai)圍電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)一起組成性能可(ke)靠的(de)(de)(de)開關穩壓(ya)(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)。交流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)通(tong)(tong)(tong)過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)濾波(bo)(bo)器(qi)后(hou)分(fen)成兩路(lu)(lu)(lu)(lu):一路(lu)(lu)(lu)(lu)經整(zheng)流(liu)(liu)濾波(bo)(bo)后(hou)供(gong)給(gei)PWM脈寬(kuan)控制(zhi)(zhi)驅(qu)(qu)動(dong)(dong)模塊STK702-015的(de)(de)(de)31、32腳,內(nei)(nei)部PWM開始工作(zuo),產生(sheng)70KHZ的(de)(de)(de)開關信號并驅(qu)(qu)動(dong)(dong)功率(lv)(lv)場效(xiao)應(ying)管作(zuo)強勁的(de)(de)(de)D類放大(da)后(hou)由(you)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)(dian)路(lu)(lu)(lu)(lu)推動(dong)(dong)高(gao)頻(pin)變壓(ya)(ya)器(qi)工作(zuo),經次級(ji)降壓(ya)(ya)后(hou)由(you)快(kuai)恢復二極管MOR3040PT半波(bo)(bo)整(zheng)流(liu)(liu)后(hou)輸(shu)(shu)出,這(zhe)里沒有濾波(bo)(bo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容,這(zhe)和普通(tong)(tong)(tong)的(de)(de)(de)開關電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)有些(xie)區(qu)別,理論(lun)和實踐告(gao)訴(su)我們(men):脈動(dong)(dong)直(zhi)(zhi)流(liu)(liu)比平滑的(de)(de)(de)直(zhi)(zhi)流(liu)(liu)對(dui)蓄(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)果(guo)更好,而(er)(er)本(ben)機的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)脈沖(chong)頻(pin)率(lv)(lv)高(gao)達70KHZ,所(suo)以(yi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)果(guo)更好,充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)速度更快(kuai)。300伏(fu)直(zhi)(zhi)流(liu)(liu)另(ling)一路(lu)(lu)(lu)(lu)向輔(fu)助(zhu)(zhu)開關電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian),輔(fu)助(zhu)(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)輸(shu)(shu)出的(de)(de)(de)直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)通(tong)(tong)(tong)過一個(ge)開關電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)后(hou)給(gei)PWM脈寬(kuan)控制(zhi)(zhi)驅(qu)(qu)動(dong)(dong)模塊提供(gong)直(zhi)(zhi)流(liu)(liu)工作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(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。上海施能電器設備有限(xian)公司始建(jian)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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