xiangbihenduogongchengshidouzhidao
，dianyuanbianyaqizaixitongzhengchangyunxingdeqiantitiaojianxia，chulehuiweixitongzhongdefangdaqigongdianwai，hainenggoujiangfangdaqiyudianyuanouheqilai。zheyangyilai，bujinrongyishidianwangzhongdeganraoyuanjinrufangdaqi，tongshiyehuijiangfangdaqichanshengdedianya、電(dian)流(liu)變(bian)化(hua)反(fan)射(she)到(dao)電(dian)網(wang)中(zhong)，由(you)此(ci)將(jiang)會(hui)產(chan)生(sheng)較(jiao)大(da)的(de)幹(gan)擾(rao)信(xin)號(hao)。因(yin)此(ci)，為(wei)了(le)避(bi)免(mian)將(jiang)電(dian)網(wang)或(huo)電(dian)路(lu)中(zhong)的(de)共(gong)模(mo)電(dian)壓(ya)偶(ou)合(he)到(dao)次(ci)級(ji)或(huo)初(chu)級(ji)中(zhong)去(qu)，對(dui)音(yin)響(xiang)用(yong)的(de)電(dian)源(yuan)變(bian)壓(ya)器(qi)的(de)繞(rao)組(zu)加(jia)法(fa)拉(la)第(di)靜(jing)電(dian)屏(ping)蔽(bi)是(shi)很(hen)關(guan)鍵(jian)的(de)。這(zhe)種(zhong)屏(ping)蔽(bi)技(ji)術(shu)可(ke)以(yi)是(shi)層(ceng)間(jian)交(jiao)替(ti)的(de)銅(tong)箔(bo)，也(ye)可(ke)以(yi)是(shi)完(wan)整(zheng)的(de)合(he)狀(zhuang)結(jie)構(gou)，總(zong)之(zhi)對(dui)變(bian)壓(ya)器(qi)繞(rao)組(zu)的(de)包(bao)圍(wei)得(de)越(yue)多(duo)，共(gong)模(mo)抑(yi)製(zhi)越(yue)好(hao)。

 

電dian源yuan變bian壓ya器qi幹gan擾rao抑yi製zhi的de另ling一yi個ge關guan鍵jian點dian，就jiu是shi針zhen對dui磁ci場chang幹gan擾rao采cai取qu適shi當dang的de抑yi製zhi方fang式shi。由you於yu磁ci場chang幹gan擾rao容rong易yi導dao致zhi放fang大da器qi質zhi量liang的de下xia降jiang，加jia之zhi磁ci屏ping蔽bi隔ge離li罩zhao的de價jia格ge比bi較jiao昂ang貴gui，所suo以yi一yi些xie國guo產chan的de產chan品pin在zai設she計ji時shi不bu會hui使shi用yong磁ci屏ping蔽bi隔ge離li罩zhao，無wu法fa對dui電dian源yuan變bian壓ya器qi進jin行xing有you效xiao的de電dian磁ci幹gan擾rao抑yi製zhi。在zai節jie省sheng成cheng本ben的de前qian提ti下xia，我wo們men可ke以yi采cai用yong多duo層ceng錳meng遊you合he金jin和he粗cu銅tong層ceng相xiang間jian的de結jie構gou，把ba變bian壓ya器qi包bao圍wei起qi來lai，一yi方fang麵mian利li用yong錳meng遊you合he金jin高gao電dian阻zu、高(gao)磁(ci)導(dao)的(de)特(te)性(xing)進(jin)行(xing)磁(ci)短(duan)路(lu)
，另(ling)一(yi)方(fang)麵(mian)通(tong)過(guo)銅(tong)層(ceng)內(nei)引(yin)起(qi)的(de)渦(wo)流(liu)產(chan)生(sheng)一(yi)個(ge)與(yu)幹(gan)擾(rao)磁(ci)場(chang)相(xiang)反(fan)的(de)磁(ci)場(chang)抵(di)消(xiao)磁(ci)幹(gan)擾(rao)，這(zhe)樣(yang)做(zuo)能(neng)夠(gou)極(ji)大(da)的(de)降(jiang)低(di)了(le)變(bian)壓(ya)器(qi)的(de)磁(ci)場(chang)外(wai)泄(xie)。除(chu)此(ci)之(zhi)外(wai)也(ye)可(ke)用(yong)1.5毫米的軟鐵板和銅板製成多層結構的磁屏蔽罩。

 

電dian源yuan變bian壓ya器qi出chu現xian噪zao聲sheng的de第di三san種zhong常chang見jian原yuan因yin，是shi低di頻pin截jie止zhi問wen題ti。當dang變bian壓ya器qi的de初chu級ji阻zu抗kang等deng於yu源yuan電dian阻zu同tong負fu載zai的de反fan射she電dian阻zu的de並bing聯lian值zhi時shi
，在zai變bian壓ya器qi的de係xi統tong內nei部bu將jiang出chu現xian低di頻pin截jie止zhi，並bing同tong時shi增zeng大da源yuan於yu幹gan式shi變bian壓ya器qi的de噪zao聲sheng，所suo以yi變bian壓ya器qi在zai設she計ji時shi必bi須xu具ju有you足zu夠gou的de電dian感gan。一yi般ban情qing況kuang下xia，在zai進jin行xing新xin型xing號hao的de變bian壓ya器qi產chan品pin設she計ji時shi
，其qi功gong率lv可ke在zai次ci級ji供gong電dian功gong率lv的de1.4—2倍之間選擇，這將會有效的實現電源變壓器幹擾抑製。