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：
本機可(ke)以(yi)對(dui)48伏以(yi)下的(de)(de)(de)(de)(de)(de)(de)蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池進行快速(su)全自(zi)動(dong)(dong)(dong)(dong)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機功(gong)(gong)率(lv)最大(da)可(ke)以(yi)達(da)到600瓦。STK702-015是一(yi)(yi)片(pian)功(gong)(gong)能(neng)強大(da)的(de)(de)(de)(de)(de)(de)(de)大(da)規模(mo)厚膜(mo)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路，內含輔助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)、PWM控制(zhi)、輸(shu)出驅(qu)動(dong)(dong)(dong)(dong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路、功(gong)(gong)率(lv)場效(xiao)(xiao)應(ying)管(guan)輸(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路等。它和(he)(he)簡單而且專用的(de)(de)(de)(de)(de)(de)(de)外圍電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路一(yi)(yi)起組成(cheng)性能(neng)可(ke)靠(kao)的(de)(de)(de)(de)(de)(de)(de)開(kai)(kai)關(guan)穩壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路。交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)通(tong)(tong)過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)濾(lv)波(bo)器(qi)后分成(cheng)兩路：一(yi)(yi)路經(jing)整流(liu)(liu)濾(lv)波(bo)后供給(gei)(gei)PWM脈寬(kuan)控制(zhi)驅(qu)動(dong)(dong)(dong)(dong)模(mo)塊STK702-015的(de)(de)(de)(de)(de)(de)(de)31、32腳(jiao)，內部PWM開(kai)(kai)始工作，產生70KHZ的(de)(de)(de)(de)(de)(de)(de)開(kai)(kai)關(guan)信(xin)號并驅(qu)動(dong)(dong)(dong)(dong)功(gong)(gong)率(lv)場效(xiao)(xiao)應(ying)管(guan)作強勁的(de)(de)(de)(de)(de)(de)(de)D類(lei)放(fang)大(da)后由25、26腳(jiao)輸(shu)出，經(jing)過特(te)殊的(de)(de)(de)(de)(de)(de)(de)LC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路推動(dong)(dong)(dong)(dong)高頻變壓(ya)器(qi)工作，經(jing)次級降(jiang)壓(ya)后由快恢復二極管(guan)MOR3040PT半波(bo)整流(liu)(liu)后輸(shu)出，這里沒有濾(lv)波(bo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容，這和(he)(he)普(pu)通(tong)(tong)的(de)(de)(de)(de)(de)(de)(de)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)有些區別，理論和(he)(he)實踐告訴我們：脈動(dong)(dong)(dong)(dong)直(zhi)(zhi)流(liu)(liu)比平滑的(de)(de)(de)(de)(de)(de)(de)直(zhi)(zhi)流(liu)(liu)對(dui)蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池的(de)(de)(de)(de)(de)(de)(de)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)(xiao)果(guo)更(geng)好，而本機的(de)(de)(de)(de)(de)(de)(de)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)脈沖頻率(lv)高達(da)70KHZ，所以(yi)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)(xiao)果(guo)更(geng)好，充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)速(su)度更(geng)快。300伏直(zhi)(zhi)流(liu)(liu)另一(yi)(yi)路向輔助(zhu)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，輔助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)輸(shu)出的(de)(de)(de)(de)(de)(de)(de)直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)通(tong)(tong)過一(yi)(yi)個(ge)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路后給(gei)(gei)PWM脈寬(kuan)控制(zhi)驅(qu)動(dong)(dong)(dong)(dong)模(mo)塊提供直(zhi)(zhi)流(liu)(liu)工作電(dian)(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(dian)器設備有限公司(si)始(shi)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(dian)器設備有限公司(si)始(shi)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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