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電源適配器的干擾如何解決?

  電源適配器的(de)(de)干(gan)擾是很(hen)多(duo)人都頭疼(teng)的(de)(de)問題,那么(me)電源適配器的(de)(de)干(gan)擾如何解決?今天我(wo)們一起來(lai)看(kan)一下!

電源適配器的干擾如何解決?

  根據電(dian)磁兼容(rong)性(xing)產生(sheng)的要素(su),解決電(dian)源適配器(qi)的電(dian)磁兼容(rong)性(xing)可從三個方面入手:

  1、減小干擾源產生的干擾信號

  2、切斷干擾信號的傳播途徑

  3、增強受干擾體的抗干擾能力

  對電源適配(pei)器(qi)產生的(de)對外干擾,如(ru)電源線(xian)諧(xie)波電流(liu)、電源線(xian)傳導(dao)干擾、電磁場輻射干擾等,只能用(yong)減(jian)小(xiao)干擾的(de)方(fang)(fang)法來解(jie)決。一(yi)(yi)方(fang)(fang)面,可以增強輸入/輸出(chu)濾波電路(lu)的(de)設計,改善(shan)有(you)源功率因數補償(chang)(APFC)電路(lu)的(de)性能,減(jian)小(xiao)開關管(guan)及(ji)整流(liu)、續流(liu)二(er)極(ji)管(guan)的(de)電壓、電流(liu)變化率,采用(yong)各種軟開關電路(lu)拓(tuo)補結構及(ji)控制方(fang)(fang)式等;另(ling)一(yi)(yi)方(fang)(fang)面,加強機(ji)(ji)殼的(de)屏蔽效果,改善(shan)機(ji)(ji)殼的(de)縫隙泄露,并進行良好的(de)接地處理(li)。

  對(dui)外部的(de)(de)抗(kang)干(gan)擾(rao)(rao)能力,如浪涌、雷(lei)(lei)擊,應(ying)優(you)化(hua)交(jiao)流(liu)輸入(ru)及(ji)直(zhi)流(liu)輸出(chu)端口(kou)的(de)(de)防(fang)雷(lei)(lei)能力。對(dui)雷(lei)(lei)擊可(ke)采用(yong)氧(yang)化(hua)鋅壓(ya)敏電(dian)(dian)(dian)阻與(yu)(yu)(yu)氣體放電(dian)(dian)(dian)管等(deng)的(de)(de)組(zu)合(he)方法來(lai)解(jie)決。對(dui)于靜(jing)電(dian)(dian)(dian)放電(dian)(dian)(dian),采用(yong)TVS管及(ji)相(xiang)應(ying)的(de)(de)接(jie)地(di)保護,加大(da)(da)小(xiao)信號(hao)電(dian)(dian)(dian)路(lu)(lu)與(yu)(yu)(yu)機殼等(deng)的(de)(de)距(ju)離,或選用(yong)具有(you)抗(kang)靜(jing)電(dian)(dian)(dian)干(gan)擾(rao)(rao)的(de)(de)器件來(lai)解(jie)決。減(jian)(jian)(jian)小(xiao)電(dian)(dian)(dian)源適配器的(de)(de)內部干(gan)擾(rao)(rao),應(ying)從以(yi)下幾個方面入(ru)手:注意數字電(dian)(dian)(dian)路(lu)(lu)與(yu)(yu)(yu)模擬電(dian)(dian)(dian)路(lu)(lu)單(dan)點接(jie)地(di),大(da)(da)電(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)路(lu)(lu)與(yu)(yu)(yu)小(xiao)電(dian)(dian)(dian)流(liu)特別(bie)是電(dian)(dian)(dian)流(liu)、電(dian)(dian)(dian)壓(ya)取(qu)樣電(dian)(dian)(dian)路(lu)(lu)的(de)(de)單(dan)點接(jie)地(di),以(yi)減(jian)(jian)(jian)小(xiao)共阻干(gan)擾(rao)(rao)、減(jian)(jian)(jian)小(xiao)地(di)環的(de)(de)影響;布線(xian)時注意相(xiang)鄰線(xian)間的(de)(de)間距(ju)及(ji)信號(hao)性質,避免產(chan)生串擾(rao)(rao);減(jian)(jian)(jian)小(xiao)地(di)線(xian)阻抗(kang);減(jian)(jian)(jian)小(xiao)高壓(ya)大(da)(da)電(dian)(dian)(dian)流(liu)線(xian)路(lu)(lu)特別(bie)是變壓(ya)器原(yuan)邊與(yu)(yu)(yu)開關(guan)管、電(dian)(dian)(dian)源濾波(bo)電(dian)(dian)(dian)容(rong)電(dian)(dian)(dian)路(lu)(lu)所包圍(wei)的(de)(de)面積;減(jian)(jian)(jian)小(xiao)輸出(chu)整流(liu)電(dian)(dian)(dian)路(lu)(lu)及(ji)續流(liu)二極管電(dian)(dian)(dian)路(lu)(lu)與(yu)(yu)(yu)直(zhi)流(liu)濾波(bo)電(dian)(dian)(dian)路(lu)(lu)所包圍(wei)的(de)(de)面積;減(jian)(jian)(jian)小(xiao)變壓(ya)器的(de)(de)漏電(dian)(dian)(dian)感、濾波(bo)電(dian)(dian)(dian)容(rong)的(de)(de)分布電(dian)(dian)(dian)容(rong);采用(yong)諧振頻率高的(de)(de)濾波(bo)電(dian)(dian)(dian)容(rong)器等(deng)。

  在(zai)傳播途徑方面(mian),適(shi)當(dang)的(de)(de)(de)增加高抗干擾能(neng)力的(de)(de)(de)TUS及高頻電(dian)容、鐵氧體磁(ci)珠等元器(qi)件,以(yi)提(ti)高小(xiao)信號電(dian)路(lu)的(de)(de)(de)抗干擾能(neng)力;與機(ji)殼距離較近的(de)(de)(de)小(xiao)信號電(dian)路(lu),應加適(shi)當(dang)的(de)(de)(de)絕緣耐壓處理等;功率器(qi)件的(de)(de)(de)散(san)熱(re)器(qi)、主(zhu)變(bian)壓器(qi)的(de)(de)(de)電(dian)磁(ci)屏蔽(bi)(bi)層要適(shi)當(dang)接(jie)地(di);各(ge)控制單(dan)元間的(de)(de)(de)大面(mian)積接(jie)地(di)用(yong)接(jie)地(di)板屏蔽(bi)(bi);在(zai)整(zheng)流(liu)器(qi)的(de)(de)(de)機(ji)架上(shang),要考慮各(ge)整(zheng)流(liu)器(qi)間電(dian)磁(ci)耦合(he)、整(zheng)機(ji)地(di)線布置等,以(yi)改善(shan)電(dian)源適(shi)配器(qi)內部工(gong)作的(de)(de)(de)穩定(ding)性。

  對于電源適配器的干擾如何(he)解(jie)決(jue)想必大(da)家已經簡單(dan)了解(jie)了,希望大(da)家遇(yu)到這個問(wen)題的時(shi)候可(ke)以順利解(jie)決(jue)!

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