光耦(ou)是(shi)電源(yuan)適配器里面(mian)眾多元(yuan)器件的其中之(zhi)一，具(ju)有體(ti)積小、壽命長、抗干擾能(neng)力強等許多優良特點(dian)。基本上(shang)每一個正規的在適配器減少電磁干擾(rao)的方案(an)上，每天的電都要(yao)用到(dao)它，現在就來和大家(jia)說一(yi)說光耦這個東西(xi)具體(ti)到底有什么作用。
在的繁雜的電路(lu)中，光耦主要起到一個信號傳(chuan)遞隔離的作用(yong)。聽起來可能很抽象，下面電源適配器廠家就簡單的說一(yi)下光耦(ou)工作流程(cheng)和作(zuo)用：
電源適配(pei)器(qi)廠家給適配(pei)器(qi)加上光耦是有很意義的，變壓(ya)器(qi)提供(gong)會給(gei)光(guang)耦(ou)(ou)提供(gong)一個專用(yong)的(de)光(guang)耦(ou)(ou)電(dian)(dian)(dian)源，當(dang)(dang)這個光(guang)耦(ou)(ou)電(dian)(dian)(dian)流(liu)(liu)和(he)電(dian)(dian)(dian)壓(ya)低于(yu)穩壓(ya)管給(gei)出的(de)標(biao)準電(dian)(dian)(dian)流(liu)(liu)電(dian)(dian)(dian)壓(ya)時(shi)，光(guang)耦(ou)(ou)就會接通(tong)，進行信號傳遞，加大電(dian)(dian)(dian)流(liu)(liu)電(dian)(dian)(dian)壓(ya)的(de)輸出。當(dang)(dang)變壓(ya)器(qi)提供(gong)的(de)電(dian)(dian)(dian)流(liu)(liu)和(he)電(dian)(dian)(dian)壓(ya)高于(yu)穩壓(ya)管給(gei)出的(de)標(biao)準電(dian)(dian)(dian)流(liu)(liu)電(dian)(dian)(dian)壓(ya)時(shi)，光(guang)耦(ou)(ou)關閉，對信號進行隔(ge)離，降低輸出電(dian)(dian)(dian)流(liu)(liu)和(he)電(dian)(dian)(dian)壓(ya)。真正的(de)實現了而實現了“電—光(guang)—電”的電路(lu)控制。
值得(de)注意的(de)是，光(guang)耦(ou)這個元器件還起(qi)到了保護電(dian)(dian)(dian)(dian)路的(de)作用，比如說，一(yi)旦變壓器發生(sheng)故障，就會停止光(guang)耦(ou)電(dian)(dian)(dian)(dian)源(yuan)(yuan)的(de)傳輸，光(guang)耦(ou)就會關(guan)閉電(dian)(dian)(dian)(dian)流電(dian)(dian)(dian)(dian)壓的(de)傳輸，對電(dian)(dian)(dian)(dian)路進行隔離，從而(er)保護開關(guan)管不(bu)被大電(dian)(dian)(dian)(dian)流擊穿燒毀。所以(yi)很多的(de)電(dian)(dian)(dian)(dian)源(yuan)(yuan)適配器廠家在生(sheng)產(chan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)的(de)時候(hou)都會應用光(guang)耦(ou)、電(dian)(dian)(dian)(dian)容電(dian)(dian)(dian)(dian)阻等(deng)元器件。
但(dan)是像一(yi)些小(xiao)的(de)電(dian)(dian)源適配(pei)器(qi)廠家(jia)就沒有那么多的(de)講究了(le)，變(bian)壓器(qi)、電(dian)(dian)容、電(dian)(dian)阻(zu)等少(shao)量幾(ji)個(ge)元(yuan)器(qi)件就組(zu)成了(le)一(yi)個(ge)電(dian)(dian)源電(dian)(dian)路(lu)，不重視電(dian)(dian)路(lu)保護，充電(dian)(dian)安(an)全難以保證。好(hao)品質，還(huan)得看大廠家(jia)！
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