茄子视频APP官网

施能百科

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)限壓(ya)大(da)功率蓄(xu)電(dian)(dian)(dian)(dian)池(chi)充電(dian)(dian)(dian)(dian)機可以(yi)對48伏以(yi)下的(de)蓄(xu)電(dian)(dian)(dian)(dian)池(chi)進行(xing)快速全自(zi)動(dong)(dong)充電(dian)(dian)(dian)(dian),充電(dian)(dian)(dian)(dian)功率最大(da)可以(yi)達到600瓦。STK702-015是一片功能強大(da)的(de)大(da)規模厚膜開關(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)電(dian)(dian)(dian)(dian)路(lu)(lu),內含輔(fu)助電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)、PWM控制、輸出驅(qu)(qu)動(dong)(dong)電(dian)(dian)(dian)(dian)路(lu)(lu)、功率場效應管(guan)輸出電(dian)(dian)(dian)(dian)路(lu)(lu)等。它和(he)簡單而(er)(er)且專用的(de)外(wai)圍(wei)電(dian)(dian)(dian)(dian)路(lu)(lu)一起組(zu)成(cheng)(cheng)性(xing)能可靠的(de)開關(guan)穩壓(ya)電(dian)(dian)(dian)(dian)路(lu)(lu)。交流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)通過(guo)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)濾(lv)波(bo)器(qi)后分成(cheng)(cheng)兩路(lu)(lu):一路(lu)(lu)經整(zheng)流(liu)(liu)(liu)濾(lv)波(bo)后供給PWM脈(mo)(mo)寬(kuan)控制驅(qu)(qu)動(dong)(dong)模塊STK702-015的(de)31、32腳,內部PWM開始工(gong)作(zuo),產(chan)生70KHZ的(de)開關(guan)信(xin)號并驅(qu)(qu)動(dong)(dong)功率場效應管(guan)作(zuo)強勁的(de)D類放(fang)大(da)后由(you)25、26腳輸出,經過(guo)特殊的(de)LC電(dian)(dian)(dian)(dian)路(lu)(lu)推動(dong)(dong)高(gao)頻(pin)(pin)變(bian)壓(ya)器(qi)工(gong)作(zuo),經次級降壓(ya)后由(you)快恢復(fu)二極管(guan)MOR3040PT半波(bo)整(zheng)流(liu)(liu)(liu)后輸出,這里沒有(you)濾(lv)波(bo)電(dian)(dian)(dian)(dian)容,這和(he)普通的(de)開關(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)有(you)些區別,理論和(he)實踐告訴(su)我(wo)們(men):脈(mo)(mo)動(dong)(dong)直(zhi)流(liu)(liu)(liu)比平滑的(de)直(zhi)流(liu)(liu)(liu)對蓄(xu)電(dian)(dian)(dian)(dian)池(chi)的(de)充電(dian)(dian)(dian)(dian)效果更好(hao),而(er)(er)本機的(de)充電(dian)(dian)(dian)(dian)脈(mo)(mo)沖(chong)頻(pin)(pin)率高(gao)達70KHZ,所以(yi)充電(dian)(dian)(dian)(dian)效果更好(hao),充電(dian)(dian)(dian)(dian)速度更快。300伏直(zhi)流(liu)(liu)(liu)另一路(lu)(lu)向輔(fu)助開關(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)供電(dian)(dian)(dian)(dian),輔(fu)助電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)輸出的(de)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)壓(ya)通過(guo)一個開關(guan)電(dian)(dian)(dian)(dian)路(lu)(lu)后給PWM脈(mo)(mo)寬(kuan)控制驅(qu)(qu)動(dong)(dong)模塊提供直(zhi)流(liu)(liu)(liu)工(gong)作(zuo)電(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)海施能電器設(she)備有限(xian)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。
公司概況 - 公司產品 - 熱點新聞