工頻交(jiao)流電(dian)源經(jing)過(guo)變壓(ya)(ya)(ya)器、 整流、濾(lv)波后(hou)(hou)(hou)成為(wei)一穩(wen)定的直流電(dian)。圖中其(qi)余部分(fen)(fen)是起電(dian)壓(ya)(ya)(ya)調(diao)節(jie)，實現穩(wen)壓(ya)(ya)(ya)作用的控制部分(fen)(fen)。電(dian)源接(jie)上負載后(hou)(hou)(hou)，通(tong)過(guo)采樣電(dian)路(lu)獲(huo)得輸(shu)(shu)出(chu)電(dian)壓(ya)(ya)(ya)，將此輸(shu)(shu)出(chu)電(dian)壓(ya)(ya)(ya)和基準(zhun)(zhun)電(dian)壓(ya)(ya)(ya)進行(xing)比較。如果輸(shu)(shu)出(chu)電(dian)壓(ya)(ya)(ya)小(xiao)于基準(zhun)(zhun)電(dian)壓(ya)(ya)(ya)，高壓(ya)(ya)(ya)直流穩(wen)壓(ya)(ya)(ya)電(dian)源，則(ze)(ze)將誤差值經(jing)過(guo)放大電(dian)路(lu)放大后(hou)(hou)(hou)送入調(diao)節(jie)器的輸(shu)(shu)入端，通(tong)過(guo)調(diao)節(jie)器調(diao)節(jie)使(shi)輸(shu)(shu)出(chu)電(dian)壓(ya)(ya)(ya)增加，直到和基準(zhun)(zhun)值相等；如果輸(shu)(shu)出(chu)電(dian)壓(ya)(ya)(ya)大于基準(zhun)(zhun)電(dian)壓(ya)(ya)(ya)，則(ze)(ze)通(tong)過(guo)調(diao)節(jie)器使(shi)輸(shu)(shu)出(chu)減(jian)小(xiao)。

將磁放(fang)大器(qi)和自(zi)耦(ou)變(bian)壓(ya)(ya)(ya)器(qi)串聯而成，利用(yong)電(dian)(dian)子線路改(gai)變(bian)磁放(fang)大器(qi)的(de)阻抗(kang)以(yi)(yi)穩(wen)定(ding)輸出電(dian)(dian)壓(ya)(ya)(ya)。滑動(dong)式(shi)(shi)交(jiao)(jiao)流(liu)穩(wen)壓(ya)(ya)(ya)器(qi)。通過(guo)改(gai)變(bian)變(bian)壓(ya)(ya)(ya)器(qi)滑動(dong)接點(dian)位(wei)置穩(wen)定(ding)輸出電(dian)(dian)壓(ya)(ya)(ya)。感(gan)應(ying)(ying)式(shi)(shi)交(jiao)(jiao)流(liu)穩(wen)壓(ya)(ya)(ya)器(qi)。靠改(gai)變(bian)變(bian)壓(ya)(ya)(ya)器(qi)次、初級電(dian)(dian)壓(ya)(ya)(ya)的(de)相位(wei)差，使(shi)輸出交(jiao)(jiao)流(liu)電(dian)(dian)壓(ya)(ya)(ya)穩(wen)定(ding)。晶(jing)閘(zha)管交(jiao)(jiao)流(liu)穩(wen)壓(ya)(ya)(ya)器(qi)。用(yong)晶(jing)閘(zha)管作功(gong)率調整元件(jian)。穩(wen)定(ding)度(du)高、反(fan)應(ying)(ying)快(kuai)且無噪聲。但對(dui)通信設備(bei)和電(dian)(dian)子設備(bei)造成干擾。20世紀80年代以(yi)(yi)后，又出現3種(zhong)新型交(jiao)(jiao)流(liu)穩(wen)壓(ya)(ya)(ya)電(dian)(dian)源：補償式(shi)(shi)交(jiao)(jiao)流(liu)穩(wen)壓(ya)(ya)(ya)器(qi)。數控式(shi)(shi)和步(bu)進式(shi)(shi)交(jiao)(jiao)流(liu)穩(wen)壓(ya)(ya)(ya)器(qi)。凈化(hua)式(shi)(shi)交(jiao)(jiao)流(liu)穩(wen)壓(ya)(ya)(ya)器(qi)。具有良好隔離(li)作用(yong)，可消(xiao)除來(lai)自(zi)電(dian)(dian)網的(de)尖峰(feng)干擾。

穩(wen)(wen)壓(ya)(ya)電(dian)(dian)源是(shi)為電(dian)(dian)路(lu)提供工(gong)作(zuo)電(dian)(dian)壓(ya)(ya)的(de)(de)，電(dian)(dian)路(lu)要(yao)有穩(wen)(wen)定的(de)(de)工(gong)作(zuo)狀態(tai)，首先(xian)支持它(ta)工(gong)作(zuo)的(de)(de)電(dian)(dian)源必須穩(wen)(wen)定電(dian)(dian)動自行車(che)自行車(che)控(kong)制器(qi)電(dian)(dian)路(lu)常(chang)用(yong)7824、7815、7812、7806、78L06、7805等，獲得(de)直流24V、15V、12V、5V 等穩(wen)(wen)壓(ya)(ya)工(gong)作(zuo)電(dian)(dian)源。可調(diao)穩(wen)(wen)壓(ya)(ya)電(dian)(dian)源有時還采用(yong)三極(ji)管與穩(wen)(wen)壓(ya)(ya)二極(ji)管并(bing)聯的(de)(de)形式。在充電(dian)(dian)器(qi)電(dian)(dian)路(lu)中則經常(chang)使用(yong)TL431與光電(dian)(dian)耦合器(qi)結合達到調(diao)壓(ya)(ya)、隔離、保護的(de)(de)目的(de)(de)。