細心的朋友在充電的時候會注意到許多充電器的上面都會有標著DC和AC這樣的字樣許多朋友都不明白這代表什么意思，今天電源適配器生產廠家就來告訴大家這些字樣代表著什么意思，順便和給大家普及一下充電器的工作原理。

手機上(shang)的(de)DC代(dai)表的(de)是(shi)(shi)直流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)，又稱“恒(heng)(heng)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)”，恒(heng)(heng)定電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)是(shi)(shi)直流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)的(de)一種，是(shi)(shi)大小和方(fang)向(xiang)都不(bu)變(bian)的(de)直流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)。恒(heng)(heng)定電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)是(shi)(shi)指大小（電(dian)(dian)(dian)壓高(gao)低）和方(fang)向(xiang)（正負極）都不(bu)隨時間(jian)（相對范(fan)圍內）而(er)變(bian)化。AC代(dai)表的(de)是(shi)(shi)交(jiao)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)。強度與(yu)方(fang)向(xiang)都隨時間(jian)做(zuo)周期性(xing)變(bian)化的(de)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)叫做(zuo)交(jiao)變(bian)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)，簡稱交(jiao)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)我們(men)常見的(de)電(dian)(dian)(dian)燈、電(dian)(dian)(dian)動機等用的(de)電(dian)(dian)(dian)都是(shi)(shi)交(jiao)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)。

目前我國統(tong)一的(de)額定電(dian)壓(ya)為220V，手(shou)機充(chong)(chong)(chong)電(dian)器(qi)就(jiu)相當(dang)于是一個小型的(de)變壓(ya)器(qi)，通(tong)過(guo)手(shou)機充(chong)(chong)(chong)電(dian)器(qi)把220V的(de)高壓(ya)脈沖轉換為5V低壓(ya)脈沖，再通(tong)過(guo)充(chong)(chong)(chong)電(dian)器(qi)的(de)轉換穩壓(ya)等，直(zhi)接(jie)變為5V的(de)直(zhi)流(liu)電(dian)，也就(jiu)是“恒壓(ya)”作用。手(shou)機充(chong)(chong)(chong)電(dian)器(qi)上面的(de)變壓(ya)器(qi)變出(chu)來(lai)的(de)是交(jiao)流(liu)電(dian)，通(tong)過(guo)整流(liu)電(dian)路再變換出(chu)直(zhi)流(liu)電(dian)后給手(shou)機充(chong)(chong)(chong)電(dian)，就(jiu)是直(zhi)流(liu)電(dian)。這就(jiu)是手(shou)機充(chong)(chong)(chong)電(dian)器(qi)的(de)工作原理。

另(ling)外電(dian)源適配器(qi)(qi)廠家也在這(zhe)里建(jian)議您為(wei)了(le)充電(dian)安(an)全，在選擇(ze)手機充電(dian)器(qi)(qi)的一定要選擇(ze)正規(gui)廠家生產的充電(dian)器(qi)(qi)