的(de)設計(ji)(ji)一般包括變壓(ya)(ya)(ya)、整流(liu)、濾波、穩(wen)壓(ya)(ya)(ya)四個(ge)(ge)基本環節。為了(le)提高電(dian)(dian)源的質量(liang)及其(qi)可(ke)靠性，需對電(dian)(dian)源輸出電(dian)(dian)壓(ya)(ya)(ya)進行采樣、比較、放(fang)大，并用(yong)此(ci)誤(wu)差放(fang)大信號來調節其(qi)輸入電(dian)(dian)壓(ya)(ya)(ya)，使(shi)得(de)負(fu)載變化時輸出電(dian)(dian)壓(ya)(ya)(ya)保(bao)(bao)持穩(wen)定(ding)。此(ci)外，為了(le)提高電(dian)(dian)源的使(shi)用(yong)安全性能(neng)，需設計(ji)(ji)簡(jian)單可(ke)靠的過(guo)壓(ya)(ya)(ya)過(guo)流(liu)保(bao)(bao)護電(dian)(dian)路，防止電(dian)(dian)壓(ya)(ya)(ya)電(dian)(dian)流(liu)過(guo)大時損壞負(fu)載元件。以下將從電(dian)(dian)源主電(dian)(dian)路、控制(zhi)電(dian)(dian)路、保(bao)(bao)護電(dian)(dian)路設計(ji)(ji)等3個(ge)(ge)方(fang)面簡(jian)要介紹直流(liu)穩(wen)壓(ya)(ya)(ya)電(dian)(dian)源的制(zhi)作方(fang)法。

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(ba)高壓(ya)交流(liu)(liu)電(dian)(dian)變(bian)(bian)為所需要(yao)的低壓(ya)交流(liu)(liu)電(dian)(dian);整流(liu)(liu)器把(ba)交流(liu)(liu)電(dian)(dian)變(bian)(bian)為脈(mo)動直(zhi)(zhi)流(liu)(liu)電(dian)(dian);濾波(bo)器濾除(chu)直(zhi)(zhi)流(liu)(liu)中的交流(liu)(liu)成(cheng)分;穩壓(ya)器把(ba)波(bo)動較(jiao)大的直(zhi)(zhi)流(liu)(liu)電(dian)(dian)壓(ya)變(bian)(bian)為穩定的直(zhi)(zhi)流(liu)(liu)電(dian)(dian)壓(ya)輸出。