電源適配器雖然不(bu)大(da)，但它所包含的(de)(de)(de)知識實(shi)在是(shi)太多了，以往總是(shi)給大(da)家(jia)講解一些(xie)電(dian)源(yuan)適(shi)配(pei)器(qi)的(de)(de)(de)常識性知識或(huo)者問題，那些(xie)都是(shi)很常見(jian)的(de)(de)(de)，今天我們就來給大(da)家(jia)聊一聊電(dian)源(yuan)適(shi)配(pei)器(qi)一些(xie)冷門的(de)(de)(de)知識，借以加(jia)強大(da)家(jia)對電(dian)源(yuan)適(shi)配(pei)器(qi)全方(fang)位的(de)(de)(de)了解，那么我們一起來看看其都有(you)哪些(xie)鮮為人知的(de)(de)(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)(dian)(dian)(dian)源(yuan)(yuan)(yuan)輸(shu)入(ru)隔(ge)(ge)離(li)(li)變(bian)(bian)壓器(qi)(qi)，這(zhe)個(ge)名(ming)詞(ci)看(kan)上去似乎非常(chang)的(de)(de)(de)高(gao)大(da)上，也(ye)常(chang)常(chang)讓一些剛(gang)開(kai)始(shi)接(jie)(jie)觸(chu)電(dian)(dian)(dian)(dian)(dian)子工(gong)(gong)程技(ji)術學習的(de)(de)(de)新(xin)人工(gong)(gong)程師們感到無從下手(shou)。實際上這(zhe)個(ge)名(ming)詞(ci)背后(hou)的(de)(de)(de)含(han)義，指的(de)(de)(de)是在(zai)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)的(de)(de)(de)輸(shu)出端接(jie)(jie)入(ru)一個(ge)隔(ge)(ge)離(li)(li)變(bian)(bian)壓器(qi)(qi)，歸根(gen)結(jie)底這(zhe)一定義主(zhu)要(yao)還(huan)是對隔(ge)(ge)離(li)(li)變(bian)(bian)壓器(qi)(qi)的(de)(de)(de)拓展理解。在(zai)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)輸(shu)入(ru)端接(jie)(jie)入(ru)一個(ge)隔(ge)(ge)離(li)(li)變(bian)(bian)壓器(qi)(qi)后(hou)，隔(ge)(ge)離(li)(li)變(bian)(bian)壓器(qi)(qi)初次(ci)級(ji)線圈隔(ge)(ge)離(li)(li)，從而能(neng)夠保(bao)障(zhang)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)系統安(an)全運行(xing)。這(zhe)也(ye)是電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)輸(shu)入(ru)隔(ge)(ge)離(li)(li)變(bian)(bian)壓器(qi)(qi)的(de)(de)(de)主(zhu)要(yao)作用。通常(chang)來看(kan)，隔(ge)(ge)離(li)(li)變(bian)(bian)壓器(qi)(qi)大(da)多(duo)適用于輸(shu)電(dian)(dian)(dian)(dian)(dian)范(fan)圍小，線路短(duan)的(de)(de)(de)供電(dian)(dian)(dian)(dian)(dian)范(fan)圍。而目前不少電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)都是直接(jie)(jie)接(jie)(jie)入(ru)220V市(shi)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)網，用電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)使(shi)(shi)用的(de)(de)(de)是低(di)電(dian)(dian)(dian)(dian)(dian)壓，故需要(yao)通過電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)變(bian)(bian)壓器(qi)(qi)進(jin)行(xing)降壓。如果(guo)不使(shi)(shi)用隔(ge)(ge)離(li)(li)變(bian)(bian)壓器(qi)(qi)可能(neng)就存在(zai)觸(chu)電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)危險(xian)，因此在(zai)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)輸(shu)入(ru)端接(jie)(jie)入(ru)一個(ge)隔(ge)(ge)離(li)(li)變(bian)(bian)壓器(qi)(qi)，能(neng)夠有效保(bao)障(zhang)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的(de)(de)(de)安(an)全運行(xing)。

　　二、低頻變壓器與高頻變壓器的測試方式是不一樣的

　　在電(dian)(dian)源變壓器(qi)(qi)的(de)應(ying)用過(guo)程(cheng)中(zhong)，按(an)照(zhao)不同的(de)工作頻(pin)率來對變壓器(qi)(qi)產品(pin)進行劃分，通常可(ke)以分成低頻(pin)變壓器(qi)(qi)和(he)高頻(pin)變壓器(qi)(qi)兩種。盡(jin)管二者的(de)工作原(yuan)理(li)是(shi)一樣的(de)，但是(shi)實際上(shang)低頻(pin)變壓器(qi)(qi)和(he)高頻(pin)變壓器(qi)(qi)的(de)測(ce)試(shi)原(yuan)理(li)不一樣的(de)。在進行測(ce)試(shi)的(de)過(guo)程(cheng)中(zhong)，低頻(pin)變壓器(qi)(qi)可(ke)以直(zhi)接對交流電(dian)(dian)進行變壓，它(ta)測(ce)試(shi)的(de)項(xiang)目(mu)主要(yao)是(shi)輸(shu)(shu)出電(dian)(dian)壓以及相關的(de)參數。包括空載(zai)(zai)輸(shu)(shu)入電(dian)(dian)流、空載(zai)(zai)輸(shu)(shu)出電(dian)(dian)壓、帶(dai)載(zai)(zai)輸(shu)(shu)入電(dian)(dian)流、帶(dai)載(zai)(zai)輸(shu)(shu)出電(dian)(dian)壓、效(xiao)率和(he)耐壓程(cheng)度等。而(er)高頻(pin)變壓器(qi)(qi)需要(yao)配合(he)電(dian)(dian)路才能工作，所以它(ta)的(de)測(ce)試(shi)項(xiang)目(mu)主要(yao)是(shi)與此相關的(de)性能測(ce)試(shi)，其(qi)測(ce)試(shi)的(de)主要(yao)內容包括電(dian)(dian)感量(liang)、漏感、匝數比和(he)耐壓程(cheng)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

　　音響電源(yuan)變(bian)(bian)壓器(qi)(qi)(qi)與(yu)普(pu)通的(de)電源(yuan)變(bian)(bian)壓器(qi)(qi)(qi)可(ke)以(yi)(yi)互相替(ti)換使用嗎(ma)?答案當然是：不能。目前市面(mian)上常(chang)見的(de)印象電源(yuan)變(bian)(bian)壓器(qi)(qi)(qi)，其實(shi)用的(de)大多都是環(huan)型變(bian)(bian)壓器(qi)(qi)(qi)。在(zai)實(shi)際應用中環(huan)形變(bian)(bian)壓器(qi)(qi)(qi)又(you)常(chang)常(chang)被叫做(zuo)“環(huan)牛”，這種形式的(de)變(bian)(bian)壓器(qi)(qi)(qi)安裝(zhuang)方(fang)便，轉換效(xiao)率也很高(gao)，同時還具有(you)漏磁小的(de)特性。在(zai)重量上環(huan)形變(bian)(bian)壓器(qi)(qi)(qi)比層(ceng)疊(die)式變(bian)(bian)壓器(qi)(qi)(qi)重量可(ke)以(yi)(yi)減輕一半，也比普(pu)通的(de)方(fang)型變(bian)(bian)壓器(qi)(qi)(qi)的(de)成本低，在(zai)制作工藝上其繞組均勻緊緊包住(zhu)環(huan)形鐵心，有(you)效(xiao)地減小磁致伸縮引起的(de)噪音，還有(you)利于散熱(re)。而之(zhi)所以(yi)(yi)開關(guan)電源(yuan)變(bian)(bian)壓器(qi)(qi)(qi)無法應用在(zai)音響電源(yuan)上，是因為開關(guan)電源(yuan)的(de)高(gao)頻干擾實(shi)在(zai)太嚴重，會大大影響音響的(de)音質。