的設(she)(she)計(ji)一般包括變壓(ya)、整流、濾波(bo)、穩(wen)壓(ya)四個(ge)(ge)基(ji)本環節。為了提(ti)高電(dian)(dian)(dian)(dian)(dian)(dian)源的(de)質量(liang)及其可(ke)靠性(xing)，需對電(dian)(dian)(dian)(dian)(dian)(dian)源輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)進行(xing)采樣(yang)、比較、放大，并用(yong)此誤差放大信號來調節其輸入電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，使得負載變化時(shi)輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)保(bao)(bao)持穩(wen)定。此外(wai)，為了提(ti)高電(dian)(dian)(dian)(dian)(dian)(dian)源的(de)使用(yong)安全性(xing)能，需設(she)(she)計(ji)簡單(dan)可(ke)靠的(de)過壓(ya)過流保(bao)(bao)護電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，防(fang)止電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)流過大時(shi)損壞(huai)負載元件(jian)。以下將從電(dian)(dian)(dian)(dian)(dian)(dian)源主電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)、控制(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)、保(bao)(bao)護電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)設(she)(she)計(ji)等(deng)3個(ge)(ge)方(fang)面簡要介紹直流穩(wen)壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)源的(de)制(zhi)作方(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(ba)高壓(ya)交(jiao)流(liu)(liu)電變為(wei)所需(xu)要(yao)的(de)(de)低壓(ya)交(jiao)流(liu)(liu)電;整流(liu)(liu)器把(ba)交(jiao)流(liu)(liu)電變為(wei)脈(mo)動直流(liu)(liu)電;濾(lv)波器濾(lv)除(chu)直流(liu)(liu)中的(de)(de)交(jiao)流(liu)(liu)成分;穩(wen)壓(ya)器把(ba)波動較大的(de)(de)直流(liu)(liu)電壓(ya)變為(wei)穩(wen)定的(de)(de)直流(liu)(liu)電壓(ya)輸(shu)出。