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DC代(dai)表的是(shi)(shi)(shi)直(zhi)流(liu)電(dian)(dian)，又稱“恒流(liu)電(dian)(dian)”，恒定電(dian)(dian)流(liu)是(shi)(shi)(shi)直(zhi)流(liu)電(dian)(dian)的一(yi)種，是(shi)(shi)(shi)大小(xiao)(xiao)和方向都不變(bian)的直(zhi)流(liu)電(dian)(dian)。恒定電(dian)(dian)流(liu)是(shi)(shi)(shi)指大小(xiao)(xiao)（電(dian)(dian)壓(ya)高低(di)）和方向（正負(fu)極）都不隨時間(jian)(jian)（相對(dui)范圍內）而(er)變(bian)化。AC代(dai)表的是(shi)(shi)(shi)交(jiao)流(liu)電(dian)(dian)。強度(du)與方向都隨時間(jian)(jian)做周期性變(bian)化的電(dian)(dian)流(liu)叫做交(jiao)變(bian)電(dian)(dian)流(liu)，簡(jian)稱交(jiao)流(liu)電(dian)(dian)我們常見的電(dian)(dian)燈、電(dian)(dian)動(dong)機(ji)等用的電(dian)(dian)都是(shi)(shi)(shi)交(jiao)流(liu)電(dian)(dian)。

目前(qian)我國統一(yi)的(de)(de)額定電(dian)(dian)(dian)壓(ya)為220V，手(shou)(shou)機(ji)(ji)充電(dian)(dian)(dian)器(qi)就(jiu)相當(dang)于是(shi)一(yi)個小型的(de)(de)變壓(ya)器(qi)，通(tong)過手(shou)(shou)機(ji)(ji)充電(dian)(dian)(dian)器(qi)把(ba)220V的(de)(de)高壓(ya)脈(mo)沖(chong)轉(zhuan)換為5V低(di)壓(ya)脈(mo)沖(chong)，再通(tong)過充電(dian)(dian)(dian)器(qi)的(de)(de)轉(zhuan)換穩壓(ya)等(deng)，直(zhi)接變為5V的(de)(de)直(zhi)流(liu)電(dian)(dian)(dian)，也就(jiu)是(shi)“恒壓(ya)”作用(yong)。手(shou)(shou)機(ji)(ji)充電(dian)(dian)(dian)器(qi)上面的(de)(de)變壓(ya)器(qi)變出來的(de)(de)是(shi)交流(liu)電(dian)(dian)(dian)，通(tong)過整流(liu)電(dian)(dian)(dian)路再變換出直(zhi)流(liu)電(dian)(dian)(dian)后給手(shou)(shou)機(ji)(ji)充電(dian)(dian)(dian)，就(jiu)是(shi)直(zhi)流(liu)電(dian)(dian)(dian)。這就(jiu)是(shi)手(shou)(shou)機(ji)(ji)充電(dian)(dian)(dian)器(qi)的(de)(de)工作原理。

另外電(dian)源(yuan)適配器廠(chang)家也在這(zhe)里(li)建議您為了充電(dian)安(an)全，在選擇手機充電(dian)器的一定要選擇正規(gui)廠(chang)家生產的充電(dian)器