電源適配器雖然不大，但它所包(bao)含(han)的(de)知識(shi)(shi)實在(zai)是太多了，以往(wang)總(zong)是給大家講解(jie)一(yi)些(xie)電(dian)源適(shi)(shi)配(pei)器(qi)的(de)常識(shi)(shi)性(xing)知識(shi)(shi)或(huo)者問題，那些(xie)都(dou)是很常見的(de)，今天我們(men)就來給大家聊一(yi)聊電(dian)源適(shi)(shi)配(pei)器(qi)一(yi)些(xie)冷門的(de)知識(shi)(shi)，借(jie)以加(jia)強大家對電(dian)源適(shi)(shi)配(pei)器(qi)全方位的(de)了解(jie)，那么我們(men)一(yi)起來看看其都(dou)有哪些(xie)鮮為人知的(de)秘密：

　　一、“電源輸入隔離變壓器”其實就是電源輸入端接入了一個隔離變壓器

　　電(dian)(dian)源(yuan)(yuan)(yuan)(yuan)輸(shu)入隔(ge)(ge)離(li)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)，這(zhe)個(ge)名詞看上(shang)去似(si)乎非常(chang)的(de)(de)(de)(de)高大上(shang)，也常(chang)常(chang)讓一些剛開始(shi)接觸(chu)電(dian)(dian)子工程(cheng)技術學(xue)習的(de)(de)(de)(de)新人工程(cheng)師們(men)感到(dao)無從(cong)下手。實際上(shang)這(zhe)個(ge)名詞背后(hou)的(de)(de)(de)(de)含義，指的(de)(de)(de)(de)是在電(dian)(dian)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)(de)輸(shu)出端接入一個(ge)隔(ge)(ge)離(li)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)，歸根結底(di)這(zhe)一定(ding)義主(zhu)要(yao)還(huan)是對隔(ge)(ge)離(li)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)的(de)(de)(de)(de)拓展理解。在電(dian)(dian)源(yuan)(yuan)(yuan)(yuan)輸(shu)入端接入一個(ge)隔(ge)(ge)離(li)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)后(hou)，隔(ge)(ge)離(li)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)初次級線(xian)圈隔(ge)(ge)離(li)，從(cong)而能夠(gou)保障電(dian)(dian)源(yuan)(yuan)(yuan)(yuan)系統安全運行。這(zhe)也是電(dian)(dian)源(yuan)(yuan)(yuan)(yuan)輸(shu)入隔(ge)(ge)離(li)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)的(de)(de)(de)(de)主(zhu)要(yao)作用(yong)(yong)。通常(chang)來(lai)看，隔(ge)(ge)離(li)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)大多適(shi)用(yong)(yong)于輸(shu)電(dian)(dian)范(fan)圍小，線(xian)路短的(de)(de)(de)(de)供電(dian)(dian)范(fan)圍。而目(mu)前不少(shao)電(dian)(dian)器(qi)(qi)都是直接接入220V市電(dian)(dian)電(dian)(dian)網，用(yong)(yong)電(dian)(dian)器(qi)(qi)使用(yong)(yong)的(de)(de)(de)(de)是低(di)電(dian)(dian)壓(ya)(ya)，故需要(yao)通過(guo)電(dian)(dian)源(yuan)(yuan)(yuan)(yuan)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)進行降壓(ya)(ya)。如果不使用(yong)(yong)隔(ge)(ge)離(li)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)可能就存在觸(chu)電(dian)(dian)的(de)(de)(de)(de)危險，因此在電(dian)(dian)源(yuan)(yuan)(yuan)(yuan)輸(shu)入端接入一個(ge)隔(ge)(ge)離(li)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)，能夠(gou)有效保障電(dian)(dian)器(qi)(qi)的(de)(de)(de)(de)安全運行。

　　二、低頻變壓器與高頻變壓器的測試方式是不一樣的

　　在(zai)電(dian)(dian)(dian)源變(bian)(bian)壓(ya)(ya)(ya)器(qi)的應用(yong)過程中，按照不(bu)同的工(gong)作(zuo)頻(pin)(pin)率(lv)來對變(bian)(bian)壓(ya)(ya)(ya)器(qi)產(chan)品進行(xing)劃分，通(tong)常(chang)可以分成低(di)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器(qi)和高(gao)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器(qi)兩種。盡(jin)管二者的工(gong)作(zuo)原(yuan)理(li)是(shi)一(yi)樣的，但是(shi)實際上低(di)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器(qi)和高(gao)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器(qi)的測(ce)試原(yuan)理(li)不(bu)一(yi)樣的。在(zai)進行(xing)測(ce)試的過程中，低(di)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器(qi)可以直接對交流電(dian)(dian)(dian)進行(xing)變(bian)(bian)壓(ya)(ya)(ya)，它測(ce)試的項目(mu)主要(yao)(yao)(yao)是(shi)輸(shu)出(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)以及相關(guan)的參數。包括空載輸(shu)入電(dian)(dian)(dian)流、空載輸(shu)出(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)、帶載輸(shu)入電(dian)(dian)(dian)流、帶載輸(shu)出(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)、效(xiao)率(lv)和耐(nai)壓(ya)(ya)(ya)程度等。而(er)高(gao)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器(qi)需要(yao)(yao)(yao)配合(he)電(dian)(dian)(dian)路才能工(gong)作(zuo)，所以它的測(ce)試項目(mu)主要(yao)(yao)(yao)是(shi)與(yu)此相關(guan)的性能測(ce)試，其測(ce)試的主要(yao)(yao)(yao)內容包括電(dian)(dian)(dian)感量(liang)、漏感、匝數比和耐(nai)壓(ya)(ya)(ya)程度。

　　三、目前市面上常見的音響電源變壓器基本上都是環形變壓器

　　音響(xiang)電(dian)(dian)源(yuan)變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)與普通的(de)電(dian)(dian)源(yuan)變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)可以互相替(ti)換(huan)使用(yong)嗎?答案(an)當(dang)然是：不能。目前市面上(shang)(shang)(shang)常見的(de)印(yin)象(xiang)電(dian)(dian)源(yuan)變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)，其實用(yong)的(de)大(da)多(duo)都是環型變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)。在(zai)(zai)實際應用(yong)中環形(xing)(xing)變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)又常常被叫(jiao)做“環牛”，這種形(xing)(xing)式的(de)變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)安裝方便(bian)，轉換(huan)效(xiao)率也很高，同時(shi)還具有漏磁(ci)小的(de)特性。在(zai)(zai)重(zhong)量上(shang)(shang)(shang)環形(xing)(xing)變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)比層疊(die)式變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)重(zhong)量可以減(jian)輕一半(ban)，也比普通的(de)方型變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)的(de)成本低，在(zai)(zai)制(zhi)作工藝上(shang)(shang)(shang)其繞(rao)組(zu)均勻緊緊包住環形(xing)(xing)鐵(tie)心(xin)，有效(xiao)地減(jian)小磁(ci)致伸縮引(yin)起的(de)噪音，還有利于散熱。而之所以開關電(dian)(dian)源(yuan)變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)無(wu)法(fa)應用(yong)在(zai)(zai)音響(xiang)電(dian)(dian)源(yuan)上(shang)(shang)(shang)，是因為開關電(dian)(dian)源(yuan)的(de)高頻(pin)干擾實在(zai)(zai)太嚴重(zhong)，會大(da)大(da)影響(xiang)音響(xiang)的(de)音質。