恒流電源與恒(heng)(heng)壓(ya)電(dian)源(yuan)(yuan)(yuan)的區別有(you)哪些呢?在(zai)我們(men)(men)日常(chang)生(sheng)活和工作中，大多數(shu)的電(dian)工工程(cheng)師們(men)(men)對(dui)于恒(heng)(heng)壓(ya)電(dian)源(yuan)(yuan)(yuan)的了解(jie)是(shi)非常(chang)熟悉的，一般恒(heng)(heng)壓(ya)電(dian)源(yuan)(yuan)(yuan)就是(shi)對(dui)于功率(lv)或者(zhe)電(dian)流(liu)有(you)著控(kong)制能力，通(tong)過輸(shu)出的電(dian)源(yuan)(yuan)(yuan)值都(dou)是(shi)固定不變(bian)的，以(yi)及對(dui)于短路、功率(lv)等方面都(dou)有(you)著保護功能，

　　而對(dui)于(yu)恒(heng)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)一般我們了解的比較(jiao)少(shao)，恒(heng)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)壓(ya)也可以稱作為(wei)(wei)穩流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)，因為(wei)(wei)平常(chang)接觸的比較(jiao)少(shao)，所以對(dui)于(yu)徹底理(li)解恒(heng)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)的概念還是(shi)具有一定(ding)難度，按物(wu)理(li)曲線(xian)來說，恒(heng)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)的輸(shu)(shu)出特點曲線(xian)與(yu)恒(heng)壓(ya)電(dian)(dian)(dian)源(yuan)的輸(shu)(shu)出曲線(xian)是(shi)完全(quan)相反(fan)的，恒(heng)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)被控(kong)制的基礎參數為(wei)(wei)輸(shu)(shu)出電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，來回依(yi)從變化的為(wei)(wei)電(dian)(dian)(dian)壓(ya)。

　　我們來通過一個例子來說(shuo)明(ming)恒流電源(yuan)(yuan)和恒壓電源(yuan)(yuan)之(zhi)前的區別：

　　一(yi)、恒壓電(dian)(dian)源(yuan)：比如說一(yi)個電(dian)(dian)壓12，電(dian)(dian)流為(wei)2安的(de)開關電(dian)(dian)源(yuan)，在要求電(dian)(dian)流從0-2之間變(bian)化(hua)時(shi)，其輸出(chu)的(de)電(dian)(dian)壓值應該是恒定不變(bian)的(de)，最多有上(shang)下不超過50%的(de)偏差，一(yi)旦電(dian)(dian)源(yuan)通過電(dian)(dian)流超過2A，那么電(dian)(dian)壓就會啟(qi)動保(bao)護機(ji)制，因為(wei)過載而停止運行。

　　二：恒(heng)流(liu)電(dian)(dian)源：還是剛(gang)剛(gang)的(de)(de)例子(zi)，如果對于電(dian)(dian)壓(ya)12伏，電(dian)(dian)流(liu)為(wei)2A的(de)(de)電(dian)(dian)壓(ya)，那騎電(dian)(dian)阻(zu)的(de)(de)正常波(bo)動(dong)范(fan)圍(wei)應該再0-6歐姆(mu)之間的(de)(de)，在(zai)這個電(dian)(dian)阻(zu)變(bian)(bian)化(hua)區間內，輸出的(de)(de)電(dian)(dian)流(liu)永遠是恒(heng)定(ding)不變(bian)(bian)的(de)(de)，而當電(dian)(dian)阻(zu)大于6歐姆(mu)時，電(dian)(dian)源就會(hui)進入保護狀態，會(hui)被認為(wei)是電(dian)(dian)壓(ya)過(guo)大而停止工作。

　　恒(heng)流電(dian)源的使(shi)用是比較(jiao)局限的，所以我們在日常工(gong)作(zuo)和生活(huo)中接觸的比少，對于(yu)橫流電(dian)壓(ya)的使(shi)用大多情(qing)況下是在電(dian)阻有變化而(er)電(dian)流必(bi)須保持穩(wen)定的場合，比較(jiao)常見(jian)就(jiu)是LED燈光的驅動等。

　　恒(heng)(heng)流(liu)(liu)電(dian)(dian)(dian)源和恒(heng)(heng)壓(ya)(ya)電(dian)(dian)(dian)源最(zui)大的(de)區別在于依付參數的(de)變(bian)化(hua)(hua)(hua)，對(dui)于恒(heng)(heng)壓(ya)(ya)電(dian)(dian)(dian)源，其(qi)可以調節的(de)參數就(jiu)是電(dian)(dian)(dian)流(liu)(liu)了(le)，大多數情況下電(dian)(dian)(dian)流(liu)(liu)輸出是從(cong)0到(dao)最(zui)大值，這個值就(jiu)是電(dian)(dian)(dian)壓(ya)(ya)可以成熟(shu)的(de)最(zui)大范圍了(le)，而(er)對(dui)于恒(heng)(heng)流(liu)(liu)電(dian)(dian)(dian)源，其(qi)可以調節的(de)參數就(jiu)是電(dian)(dian)(dian)壓(ya)(ya)了(le)，為(wei)了(le)保持電(dian)(dian)(dian)流(liu)(liu)的(de)穩定，輸出的(de)電(dian)(dian)(dian)壓(ya)(ya)必須根據電(dian)(dian)(dian)阻的(de)變(bian)化(hua)(hua)(hua)而(er)變(bian)化(hua)(hua)(hua)。