的設計一般包括變壓(ya)(ya)(ya)、整(zheng)流(liu)、濾波(bo)、穩壓(ya)(ya)(ya)四個基本環節(jie)。為了提(ti)高電(dian)(dian)(dian)(dian)(dian)源(yuan)的質量(liang)及其可(ke)靠性，需對電(dian)(dian)(dian)(dian)(dian)源(yuan)輸出電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)進行采樣(yang)、比(bi)較、放(fang)大(da)，并(bing)用此誤(wu)差放(fang)大(da)信號來(lai)調節(jie)其輸入(ru)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)，使(shi)得負載變化時輸出電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)保(bao)持穩定(ding)。此外(wai)，為了提(ti)高電(dian)(dian)(dian)(dian)(dian)源(yuan)的使(shi)用安(an)全性能，需設計簡(jian)單可(ke)靠的過(guo)壓(ya)(ya)(ya)過(guo)流(liu)保(bao)護電(dian)(dian)(dian)(dian)(dian)路(lu)，防止電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)(dian)流(liu)過(guo)大(da)時損(sun)壞負載元(yuan)件。以下(xia)將從電(dian)(dian)(dian)(dian)(dian)源(yuan)主(zhu)電(dian)(dian)(dian)(dian)(dian)路(lu)、控制電(dian)(dian)(dian)(dian)(dian)路(lu)、保(bao)護電(dian)(dian)(dian)(dian)(dian)路(lu)設計等3個方(fang)(fang)面簡(jian)要介(jie)紹直流(liu)穩壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)(dian)源(yuan)的制作(zuo)方(fang)(fang)法(fa)。

主電路部分設計主要包括電源變壓器、整流電路、濾波電路、穩壓電路設計(圖1)。變壓器把高壓交(jiao)流(liu)(liu)電(dian)變為(wei)(wei)所需要的低壓交(jiao)流(liu)(liu)電(dian);整流(liu)(liu)器(qi)把交(jiao)流(liu)(liu)電(dian)變為(wei)(wei)脈動直流(liu)(liu)電(dian);濾波(bo)器(qi)濾除直流(liu)(liu)中的交(jiao)流(liu)(liu)成分;穩壓器(qi)把波(bo)動較大的直流(liu)(liu)電(dian)壓變為(wei)(wei)穩定的直流(liu)(liu)電(dian)壓輸出。