kaiguandianyuanshipeiqizaigongzuoguochengzhong
，ruguoyinweidiancijianrongshejimeiyoudaowei，namebianhenrongyishoudaodianciganraobingchuxianguzhang。qishi，henduogongchengshikenengbingbulejiedeyidianshi，qiaqiashikaiguandianyuanneibudekaiguandianluyetongyangshizhuyaodedianciganraoyuanzhiyi，yetongyangshixuyaojishicaiquxiangguancuoshijinxingkongzhide。

開關電源的內部核心構造主要由開關管和高頻變壓器組成。這種組織結構在工作中所產生的dv/dtshijuyoujiaodafududemaichong，pindaijiaokuanqiexiebofengfu，zheyejiushiduikaiguandianyuanshipeiqizaochengdianciganraodewentisuozai。zaigongzuozhong，zhezhongmaichongganraochanshengdezhuyaoyuanyinzhuyaoyouyixialiangdian：

最zui常chang見jian的de一yi種zhong原yuan因yin是shi開kai關guan電dian路lu的de開kai關guan管guan負fu載zai為wei高gao頻pin變bian壓ya器qi初chu級ji線xian圈quan
，進jin而er變bian成cheng感gan性xing負fu載zai。在zai開kai關guan管guan導dao通tong瞬shun間jian，初chu級ji線xian圈quan產chan生sheng很hen大da的de湧yong流liu，並bing在zai初chu級ji線xian圈quan的de兩liang端duan出chu現xian較jiao高gao的de浪lang湧yong尖jian峰feng電dian壓ya。而er在zai開kai關guan管guan斷duan開kai瞬shun間jian
，由you於yu初chu級ji線xian圈quan的de漏lou磁ci通tong，致zhi使shi一yi部bu分fen能neng量liang沒mei有you從cong一yi次ci線xian圈quan傳chuan輸shu到dao二er次ci線xian圈quan，儲chu藏zang在zai電dian感gan中zhong的de這zhe部bu分fen能neng量liang將jiang和he集ji電dian極ji電dian路lu中zhong的de電dian容rong、電(dian)阻(zu)形(xing)成(cheng)帶(dai)有(you)尖(jian)峰(feng)的(de)衰(shuai)減(jian)振(zhen)蕩(dang)
，疊(die)加(jia)在(zai)關(guan)斷(duan)電(dian)壓(ya)上(shang)，形(xing)成(cheng)關(guan)斷(duan)電(dian)壓(ya)尖(jian)峰(feng)。這(zhe)種(zhong)電(dian)源(yuan)電(dian)壓(ya)中(zhong)斷(duan)會(hui)產(chan)生(sheng)與(yu)初(chu)級(ji)線(xian)圈(quan)接(jie)通(tong)時(shi)一(yi)樣(yang)的(de)磁(ci)化(hua)衝(chong)擊(ji)電(dian)流(liu)瞬(shun)變(bian)，這(zhe)個(ge)噪(zao)聲(sheng)會(hui)傳(chuan)導(dao)到(dao)輸(shu)入(ru)輸(shu)出(chu)端(duan)，形(xing)成(cheng)傳(chuan)導(dao)幹(gan)擾(rao)，重(zhong)者(zhe)有(you)可(ke)能(neng)擊(ji)穿(chuan)開(kai)關(guan)管(guan)。

第二種比較常見的原因是脈衝變壓器初級線圈
、開kai關guan管guan和he濾lv波bo電dian容rong構gou成cheng的de高gao頻pin開kai關guan電dian流liu環huan路lu中zhong，可ke能neng會hui產chan生sheng較jiao大da的de空kong間jian輻fu射she，並bing進jin一yi步bu形xing成cheng輻fu射she幹gan擾rao。如ru果guo電dian容rong濾lv波bo容rong量liang不bu足zu或huo高gao頻pin特te性xing不bu好hao，電dian容rong上shang的de高gao頻pin阻zu抗kang會hui使shi高gao頻pin電dian流liu以yi差cha模mo方fang式shi傳chuan導dao到dao交jiao流liu電dian源yuan中zhong形xing成cheng傳chuan導dao幹gan擾rao。

zailejielekaiguandianyuanneibudekaiguandianluhuixingchengdianciganraowentihou，gongchengshikeyizaishejikaiguandianyuanshipeiqideguochengzhong，youzhongdiandejinxingkangganraoqianghua，fangzhineibuchanshengdedianciganraoboduishipeiqizhengchangdegongzuozaochengyingxiang。

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