電源適配器雖然(ran)不大(da)，但它所包含的知識(shi)實在是(shi)太多(duo)了，以往總(zong)是(shi)給(gei)大(da)家(jia)講解(jie)一(yi)些電(dian)源適配器的常(chang)識(shi)性知識(shi)或者問題，那些都是(shi)很常(chang)見的，今天我們就(jiu)來(lai)給(gei)大(da)家(jia)聊(liao)一(yi)聊(liao)電(dian)源適配器一(yi)些冷(leng)門的知識(shi)，借以加強(qiang)大(da)家(jia)對電(dian)源適配器全方位(wei)的了解(jie)，那么我們一(yi)起(qi)來(lai)看(kan)(kan)看(kan)(kan)其都有哪些鮮(xian)為人(ren)知的秘密(mi)：

　　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)(dian)源(yuan)(yuan)輸(shu)入(ru)(ru)(ru)(ru)隔(ge)(ge)離(li)(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)(qi)，這個名詞看上去(qu)似乎非(fei)常(chang)的(de)(de)(de)高大上，也常(chang)常(chang)讓一(yi)(yi)些剛開始接(jie)觸(chu)電(dian)(dian)(dian)(dian)(dian)(dian)子工程技術學習(xi)的(de)(de)(de)新人工程師們感到無從下(xia)手。實際上這個名詞背后(hou)的(de)(de)(de)含(han)義，指的(de)(de)(de)是在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)的(de)(de)(de)輸(shu)出端接(jie)入(ru)(ru)(ru)(ru)一(yi)(yi)個隔(ge)(ge)離(li)(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)(qi)，歸根結(jie)底這一(yi)(yi)定義主(zhu)要還是對隔(ge)(ge)離(li)(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)(qi)的(de)(de)(de)拓(tuo)展理解(jie)。在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)入(ru)(ru)(ru)(ru)端接(jie)入(ru)(ru)(ru)(ru)一(yi)(yi)個隔(ge)(ge)離(li)(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)(qi)后(hou)，隔(ge)(ge)離(li)(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)(qi)初次級線(xian)(xian)圈隔(ge)(ge)離(li)(li)(li)，從而能夠保障電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)系統安全運(yun)行(xing)。這也是電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)入(ru)(ru)(ru)(ru)隔(ge)(ge)離(li)(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)(qi)的(de)(de)(de)主(zhu)要作用(yong)(yong)。通常(chang)來看，隔(ge)(ge)離(li)(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)(qi)大多適(shi)用(yong)(yong)于輸(shu)電(dian)(dian)(dian)(dian)(dian)(dian)范圍(wei)小，線(xian)(xian)路短的(de)(de)(de)供電(dian)(dian)(dian)(dian)(dian)(dian)范圍(wei)。而目前不(bu)少(shao)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)都(dou)是直接(jie)接(jie)入(ru)(ru)(ru)(ru)220V市電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)網，用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)使用(yong)(yong)的(de)(de)(de)是低(di)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，故需要通過電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)變(bian)(bian)壓(ya)(ya)器(qi)(qi)進行(xing)降壓(ya)(ya)。如(ru)果不(bu)使用(yong)(yong)隔(ge)(ge)離(li)(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)(qi)可能就存(cun)在(zai)(zai)觸(chu)電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)危(wei)險(xian)，因此在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)入(ru)(ru)(ru)(ru)端接(jie)入(ru)(ru)(ru)(ru)一(yi)(yi)個隔(ge)(ge)離(li)(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)(qi)，能夠有效(xiao)保障電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的(de)(de)(de)安全運(yun)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)(dian)(dian)源(yuan)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)的(de)(de)(de)應用(yong)過(guo)程(cheng)中(zhong)，按照不同的(de)(de)(de)工作頻(pin)(pin)率來對(dui)(dui)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)產品進行(xing)劃分(fen)，通常可(ke)以分(fen)成(cheng)低(di)頻(pin)(pin)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)和高(gao)頻(pin)(pin)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)兩(liang)種。盡管二者的(de)(de)(de)工作原理是(shi)一(yi)樣的(de)(de)(de)，但(dan)是(shi)實際上低(di)頻(pin)(pin)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)和高(gao)頻(pin)(pin)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)的(de)(de)(de)測(ce)試(shi)原理不一(yi)樣的(de)(de)(de)。在進行(xing)測(ce)試(shi)的(de)(de)(de)過(guo)程(cheng)中(zhong)，低(di)頻(pin)(pin)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)可(ke)以直接對(dui)(dui)交流(liu)(liu)電(dian)(dian)(dian)(dian)進行(xing)變(bian)(bian)(bian)(bian)壓(ya)(ya)，它(ta)(ta)測(ce)試(shi)的(de)(de)(de)項目主要(yao)是(shi)輸(shu)出電(dian)(dian)(dian)(dian)壓(ya)(ya)以及相關(guan)的(de)(de)(de)參數。包括空載(zai)(zai)輸(shu)入電(dian)(dian)(dian)(dian)流(liu)(liu)、空載(zai)(zai)輸(shu)出電(dian)(dian)(dian)(dian)壓(ya)(ya)、帶載(zai)(zai)輸(shu)入電(dian)(dian)(dian)(dian)流(liu)(liu)、帶載(zai)(zai)輸(shu)出電(dian)(dian)(dian)(dian)壓(ya)(ya)、效率和耐壓(ya)(ya)程(cheng)度等(deng)。而(er)高(gao)頻(pin)(pin)變(bian)(bian)(bian)(bian)壓(ya)(ya)器(qi)需要(yao)配合電(dian)(dian)(dian)(dian)路才能工作，所(suo)以它(ta)(ta)的(de)(de)(de)測(ce)試(shi)項目主要(yao)是(shi)與(yu)此(ci)相關(guan)的(de)(de)(de)性能測(ce)試(shi)，其測(ce)試(shi)的(de)(de)(de)主要(yao)內容包括電(dian)(dian)(dian)(dian)感量(liang)、漏感、匝數比和耐壓(ya)(ya)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(yin)響(xiang)(xiang)電(dian)源(yuan)變(bian)壓器(qi)(qi)與普(pu)通(tong)的(de)(de)電(dian)源(yuan)變(bian)壓器(qi)(qi)可(ke)以互相(xiang)替換使用(yong)(yong)嗎?答案當然是(shi)：不(bu)能。目前(qian)市面上常見的(de)(de)印象電(dian)源(yuan)變(bian)壓器(qi)(qi)，其(qi)實用(yong)(yong)的(de)(de)大多都是(shi)環(huan)型變(bian)壓器(qi)(qi)。在(zai)實際應(ying)用(yong)(yong)中環(huan)形(xing)變(bian)壓器(qi)(qi)又常常被叫(jiao)做“環(huan)牛”，這種形(xing)式的(de)(de)變(bian)壓器(qi)(qi)安(an)裝方便，轉(zhuan)換效率也(ye)很高，同(tong)時還具(ju)有漏(lou)磁小(xiao)的(de)(de)特性。在(zai)重(zhong)量上環(huan)形(xing)變(bian)壓器(qi)(qi)比層疊式變(bian)壓器(qi)(qi)重(zhong)量可(ke)以減輕一(yi)半，也(ye)比普(pu)通(tong)的(de)(de)方型變(bian)壓器(qi)(qi)的(de)(de)成本低，在(zai)制作工藝上其(qi)繞組均勻(yun)緊(jin)緊(jin)包住環(huan)形(xing)鐵心，有效地(di)減小(xiao)磁致伸(shen)縮引(yin)起(qi)的(de)(de)噪(zao)音(yin)，還有利于散(san)熱。而之(zhi)所以開關電(dian)源(yuan)變(bian)壓器(qi)(qi)無(wu)法(fa)應(ying)用(yong)(yong)在(zai)音(yin)響(xiang)(xiang)電(dian)源(yuan)上，是(shi)因為開關電(dian)源(yuan)的(de)(de)高頻(pin)干擾實在(zai)太(tai)嚴(yan)重(zhong)，會大大影響(xiang)(xiang)音(yin)響(xiang)(xiang)的(de)(de)音(yin)質。