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(ben)機可以(yi)對48伏(fu)(fu)以(yi)下的(de)(de)(de)(de)蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池進(jin)行快(kuai)速(su)全自動(dong)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機功率最大可以(yi)達(da)到600瓦。STK702-015是一(yi)片功能強(qiang)大的(de)(de)(de)(de)大規模(mo)(mo)厚膜開(kai)(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，內含輔助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)、PWM控制(zhi)、輸出(chu)(chu)驅(qu)(qu)動(dong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)、功率場效應管輸出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)等(deng)。它和(he)簡單(dan)而且專用(yong)的(de)(de)(de)(de)外圍電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)一(yi)起組成性(xing)能可靠的(de)(de)(de)(de)開(kai)(kai)(kai)關(guan)(guan)穩壓電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)。交流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)通過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)濾(lv)波(bo)(bo)器后(hou)分成兩路(lu)：一(yi)路(lu)經整流(liu)(liu)濾(lv)波(bo)(bo)后(hou)供(gong)(gong)給(gei)PWM脈(mo)寬(kuan)控制(zhi)驅(qu)(qu)動(dong)模(mo)(mo)塊STK702-015的(de)(de)(de)(de)31、32腳(jiao)，內部(bu)PWM開(kai)(kai)(kai)始工作，產生70KHZ的(de)(de)(de)(de)開(kai)(kai)(kai)關(guan)(guan)信號并(bing)驅(qu)(qu)動(dong)功率場效應管作強(qiang)勁的(de)(de)(de)(de)D類放大后(hou)由25、26腳(jiao)輸出(chu)(chu)，經過特殊的(de)(de)(de)(de)LC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)推動(dong)高頻變壓器工作，經次級降壓后(hou)由快(kuai)恢復二(er)極管MOR3040PT半波(bo)(bo)整流(liu)(liu)后(hou)輸出(chu)(chu)，這里沒有(you)濾(lv)波(bo)(bo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容，這和(he)普通的(de)(de)(de)(de)開(kai)(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)有(you)些區別，理論和(he)實踐告訴(su)我們：脈(mo)動(dong)直(zhi)(zhi)流(liu)(liu)比平滑的(de)(de)(de)(de)直(zhi)(zhi)流(liu)(liu)對蓄(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池的(de)(de)(de)(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效果更好，而本(ben)機的(de)(de)(de)(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)脈(mo)沖頻率高達(da)70KHZ，所以(yi)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效果更好，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)速(su)度(du)更快(kuai)。300伏(fu)(fu)直(zhi)(zhi)流(liu)(liu)另(ling)一(yi)路(lu)向輔助(zhu)開(kai)(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，輔助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)輸出(chu)(chu)的(de)(de)(de)(de)直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓通過一(yi)個開(kai)(kai)(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)后(hou)給(gei)PWM脈(mo)寬(kuan)控制(zhi)驅(qu)(qu)動(dong)模(mo)(mo)塊提供(gong)(gong)直(zhi)(zhi)流(liu)(liu)工作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓。
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(shi)能電(dian)器設備有限(xian)公司始(shi)建于(yu)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(shi)能電(dian)器設備有限(xian)公司始(shi)建于(yu)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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