作(zuo)為Flypower電(dian)源適配器廠家的(de)電(dian)源研發工(gong)程師，在(zai)進(jin)行電(dian)源產(chan)品設計時經(jing)常會遇到各種各樣的(de)技術難題，但是通過團隊協作(zuo)，我們攻克了一個(ge)又(you)一個(ge)的(de)難關。今天Flypower就和大家分(fen)享(xiang)一下在(zai)進(jin)行電(dian)源產(chan)品設計時常見的(de)五個(ge)問題，并做出(chu)解答。

一、電源開(kai)關交流(liu)回(hui)路和整流(liu)器(qi)的交流(liu)回(hui)路是最容(rong)易產(chan)生電磁干擾的嗎(ma)？

開(kai)關電(dian)(dian)(dian)源(yuan)(yuan)(yuan)產生電(dian)(dian)(dian)磁干擾最嚴(yan)重(zhong)的(de)(de)(de)地(di)方(fang)是(shi)開(kai)關變壓器(qi)的(de)(de)(de)初、次級(ji)線(xian)(xian)(xian)圈組成的(de)(de)(de)電(dian)(dian)(dian)路(lu)，但它(ta)的(de)(de)(de)干擾會(hui)通過(guo)感應對其它(ta)電(dian)(dian)(dian)路(lu)產生輻射和傳導干擾，傳導干擾和輻射干擾最嚴(yan)重(zhong)的(de)(de)(de)地(di)方(fang)是(shi)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)，因(yin)為電(dian)(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)很(hen)容易成為輻射源(yuan)(yuan)(yuan)的(de)(de)(de)半波振子天線(xian)(xian)(xian)，另外(wai)它(ta)又與外(wai)線(xian)(xian)(xian)路(lu)進(jin)行連(lian)接，很(hen)容易把(ba)干擾信號傳輸給其它(ta)設(she)備。所以在開(kai)關電(dian)(dian)(dian)源(yuan)(yuan)(yuan)的(de)(de)(de)輸入(ru)端一定要對電(dian)(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)進(jin)行有效(xiao)隔(ge)離。

二、正激(ji)和反(fan)激(ji)的區別主要在哪？

　正(zheng)激(ji)式(shi)開關(guan)(guan)(guan)(guan)電(dian)(dian)(dian)(dian)源是電(dian)(dian)(dian)(dian)源開關(guan)(guan)(guan)(guan)管導通(tong)的(de)(de)時(shi)候，電(dian)(dian)(dian)(dian)源向(xiang)負(fu)(fu)責(ze)提供功(gong)率(lv)輸(shu)(shu)出(chu)(chu)，而關(guan)(guan)(guan)(guan)斷的(de)(de)時(shi)候沒(mei)有(you)功(gong)率(lv)輸(shu)(shu)出(chu)(chu)。反(fan)激(ji)式(shi)開關(guan)(guan)(guan)(guan)電(dian)(dian)(dian)(dian)源正(zheng)好(hao)相(xiang)反(fan)，電(dian)(dian)(dian)(dian)源開關(guan)(guan)(guan)(guan)管導通(tong)時(shi)只向(xiang)變壓(ya)器存儲能量，沒(mei)有(you)給負(fu)(fu)載(zai)提供功(gong)率(lv)輸(shu)(shu)出(chu)(chu)，僅(jin)在電(dian)(dian)(dian)(dian)源開關(guan)(guan)(guan)(guan)管關(guan)(guan)(guan)(guan)斷時(shi)才(cai)向(xiang)負(fu)(fu)載(zai)提供輸(shu)(shu)出(chu)(chu)。正(zheng)激(ji)式(shi)開關(guan)(guan)(guan)(guan)電(dian)(dian)(dian)(dian)源輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)是取整流輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)的(de)(de)平均值，反(fan)激(ji)式(shi)開關(guan)(guan)(guan)(guan)電(dian)(dian)(dian)(dian)源輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)是取整流輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)的(de)(de)半波平均值，兩種(zhong)電(dian)(dian)(dian)(dian)壓(ya)輸(shu)(shu)出(chu)(chu)的(de)(de)相(xiang)位正(zheng)好(hao)相(xiang)反(fan)。

三、銅箔損(sun)耗占電源損(sun)耗比例約為(wei)多少？

非常小，如果(guo)銅箔(bo)損耗大(da)，銅箔(bo)的溫(wen)升(sheng)會很高(gao)，如果(guo)超過80度(du)，銅箔(bo)的油(you)漆(qi)會發(fa)黃。但也只相當(dang)于一個1～3瓦左右(you)的金屬膜電阻(zu)在(zai)同樣溫(wen)升(sheng)時(shi)的損耗。

四、做DC TO DC效(xiao)率有點低(di)，怎樣解決？

把工作頻(pin)率(lv)降(jiang)低，或把電源開(kai)(kai)關管換成一個高速開(kai)(kai)關管，另外，還可(ke)以把變(bian)(bian)壓(ya)(ya)器(qi)的(de)(de)體積加大，把最(zui)大磁通(tong)密度（Bm）的(de)(de)取(qu)值降(jiang)低，即(ji)把開(kai)(kai)關變(bian)(bian)壓(ya)(ya)器(qi)初級(ji)線圈的(de)(de)匝數增加，因為開(kai)(kai)關變(bian)(bian)壓(ya)(ya)器(qi)的(de)(de)磁滯損耗(hao)和渦流損耗(hao)與工作頻(pin)率(lv)成正(zheng)比(bi)，與最(zui)大磁通(tong)密度增量(liang)的(de)(de)平方成正(zheng)比(bi)。

五、反激式變壓器電源輸(shu)出側有毛刺(ci)，且毛刺(ci)的頻(pin)率和原邊(bian)開關頻(pin)率一樣(yang)，怎么(me)消除(chu)毛刺(ci)呢？

在次級整流(liu)(liu)與濾波電容(rong)之間串了一(yi)個小電感，但(dan)電感流(liu)(liu)過直流(liu)(liu)時不能飽和，這種電感的磁回(hui)路不能用封閉式的，必須要留有很(hen)大的氣(qi)隙(xi)。

Flypower 電(dian)(dian)源適(shi)配器廠家，擁有超過100人的(de)研(yan)發團(tuan)隊，20余(yu)名碩(shuo)士(shi)學位以上高(gao)級工程(cheng)師(shi)，把握著電(dian)(dian)源行(xing)業(ye)的(de)最新技術，實力雄厚。想要定制或者采購電(dian)(dian)源產品，歡迎隨時聯系我們(men)。