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(ji)上的(de)DC代(dai)表的(de)是(shi)直流(liu)電(dian)，又稱“恒流(liu)電(dian)”，恒定(ding)電(dian)流(liu)是(shi)直流(liu)電(dian)的(de)一種，是(shi)大(da)小和(he)(he)方向(xiang)都(dou)(dou)不(bu)變(bian)的(de)直流(liu)電(dian)。恒定(ding)電(dian)流(liu)是(shi)指大(da)小（電(dian)壓(ya)高低）和(he)(he)方向(xiang)（正負(fu)極(ji)）都(dou)(dou)不(bu)隨(sui)時(shi)間（相(xiang)對(dui)范圍內）而變(bian)化。AC代(dai)表的(de)是(shi)交(jiao)流(liu)電(dian)。強度與方向(xiang)都(dou)(dou)隨(sui)時(shi)間做周(zhou)期(qi)性變(bian)化的(de)電(dian)流(liu)叫做交(jiao)變(bian)電(dian)流(liu)，簡稱交(jiao)流(liu)電(dian)我們常見(jian)的(de)電(dian)燈、電(dian)動機(ji)等(deng)用的(de)電(dian)都(dou)(dou)是(shi)交(jiao)流(liu)電(dian)。

目前我國(guo)統一的(de)(de)額(e)定電(dian)(dian)(dian)壓(ya)(ya)(ya)為(wei)(wei)(wei)220V，手機(ji)(ji)(ji)充(chong)(chong)電(dian)(dian)(dian)器(qi)就(jiu)(jiu)相(xiang)當于是一個小型的(de)(de)變(bian)(bian)壓(ya)(ya)(ya)器(qi)，通(tong)過(guo)手機(ji)(ji)(ji)充(chong)(chong)電(dian)(dian)(dian)器(qi)把220V的(de)(de)高壓(ya)(ya)(ya)脈(mo)(mo)沖轉(zhuan)換為(wei)(wei)(wei)5V低壓(ya)(ya)(ya)脈(mo)(mo)沖，再通(tong)過(guo)充(chong)(chong)電(dian)(dian)(dian)器(qi)的(de)(de)轉(zhuan)換穩壓(ya)(ya)(ya)等，直(zhi)接變(bian)(bian)為(wei)(wei)(wei)5V的(de)(de)直(zhi)流(liu)(liu)電(dian)(dian)(dian)，也就(jiu)(jiu)是“恒壓(ya)(ya)(ya)”作(zuo)(zuo)用。手機(ji)(ji)(ji)充(chong)(chong)電(dian)(dian)(dian)器(qi)上面的(de)(de)變(bian)(bian)壓(ya)(ya)(ya)器(qi)變(bian)(bian)出來的(de)(de)是交流(liu)(liu)電(dian)(dian)(dian)，通(tong)過(guo)整流(liu)(liu)電(dian)(dian)(dian)路再變(bian)(bian)換出直(zhi)流(liu)(liu)電(dian)(dian)(dian)后給手機(ji)(ji)(ji)充(chong)(chong)電(dian)(dian)(dian)，就(jiu)(jiu)是直(zhi)流(liu)(liu)電(dian)(dian)(dian)。這就(jiu)(jiu)是手機(ji)(ji)(ji)充(chong)(chong)電(dian)(dian)(dian)器(qi)的(de)(de)工作(zuo)(zuo)原(yuan)理。

另外電(dian)源適配器廠家也在這里建議您為(wei)了充(chong)電(dian)安全，在選擇手機充(chong)電(dian)器的(de)一定要選擇正規廠家生(sheng)產的(de)充(chong)電(dian)器