電源適配器雖然不大(da)，但它所(suo)包含(han)的知(zhi)識(shi)(shi)實在是太多了，以往(wang)總是給大(da)家講解一(yi)些(xie)(xie)電源適(shi)配器的常識(shi)(shi)性知(zhi)識(shi)(shi)或者問題(ti)，那(nei)些(xie)(xie)都是很常見的，今天(tian)我(wo)們(men)就來(lai)給大(da)家聊一(yi)聊電源適(shi)配器一(yi)些(xie)(xie)冷門的知(zhi)識(shi)(shi)，借以加強(qiang)大(da)家對電源適(shi)配器全(quan)方位(wei)的了解，那(nei)么我(wo)們(men)一(yi)起來(lai)看(kan)看(kan)其(qi)都有哪些(xie)(xie)鮮為人(ren)知(zhi)的秘(mi)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)源輸(shu)(shu)(shu)入(ru)(ru)隔(ge)(ge)離(li)(li)(li)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)，這(zhe)個(ge)(ge)(ge)(ge)名(ming)詞看上去似乎非常的(de)(de)高大(da)上，也常常讓(rang)一(yi)些剛(gang)開始接(jie)(jie)觸電(dian)(dian)子工程技術學習的(de)(de)新人工程師們(men)感到無從下手。實(shi)際(ji)上這(zhe)個(ge)(ge)(ge)(ge)名(ming)詞背后的(de)(de)含義，指的(de)(de)是(shi)在電(dian)(dian)源的(de)(de)輸(shu)(shu)(shu)出(chu)端接(jie)(jie)入(ru)(ru)一(yi)個(ge)(ge)(ge)(ge)隔(ge)(ge)離(li)(li)(li)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)，歸(gui)根結底這(zhe)一(yi)定義主(zhu)要(yao)(yao)還是(shi)對(dui)隔(ge)(ge)離(li)(li)(li)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)的(de)(de)拓展理(li)解。在電(dian)(dian)源輸(shu)(shu)(shu)入(ru)(ru)端接(jie)(jie)入(ru)(ru)一(yi)個(ge)(ge)(ge)(ge)隔(ge)(ge)離(li)(li)(li)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)后，隔(ge)(ge)離(li)(li)(li)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)初(chu)次級線圈隔(ge)(ge)離(li)(li)(li)，從而(er)能夠保(bao)障(zhang)電(dian)(dian)源系統(tong)安(an)全(quan)運行(xing)。這(zhe)也是(shi)電(dian)(dian)源輸(shu)(shu)(shu)入(ru)(ru)隔(ge)(ge)離(li)(li)(li)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)的(de)(de)主(zhu)要(yao)(yao)作用(yong)。通常來(lai)看，隔(ge)(ge)離(li)(li)(li)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)大(da)多適用(yong)于(yu)輸(shu)(shu)(shu)電(dian)(dian)范圍小(xiao)，線路短的(de)(de)供電(dian)(dian)范圍。而(er)目前不(bu)(bu)少電(dian)(dian)器(qi)(qi)都是(shi)直接(jie)(jie)接(jie)(jie)入(ru)(ru)220V市電(dian)(dian)電(dian)(dian)網，用(yong)電(dian)(dian)器(qi)(qi)使(shi)(shi)用(yong)的(de)(de)是(shi)低電(dian)(dian)壓(ya)(ya)(ya)，故需要(yao)(yao)通過電(dian)(dian)源變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)進行(xing)降壓(ya)(ya)(ya)。如果不(bu)(bu)使(shi)(shi)用(yong)隔(ge)(ge)離(li)(li)(li)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)可能就(jiu)存在觸電(dian)(dian)的(de)(de)危(wei)險，因此在電(dian)(dian)源輸(shu)(shu)(shu)入(ru)(ru)端接(jie)(jie)入(ru)(ru)一(yi)個(ge)(ge)(ge)(ge)隔(ge)(ge)離(li)(li)(li)變(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)，能夠有(you)效保(bao)障(zhang)電(dian)(dian)器(qi)(qi)的(de)(de)安(an)全(quan)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(zai)電(dian)(dian)源變(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)的(de)應用過程(cheng)(cheng)中，按照不同的(de)工(gong)作頻(pin)(pin)率來對變(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)產品進(jin)(jin)行劃(hua)分，通常可以(yi)分成低頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)和(he)(he)高(gao)(gao)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)兩種。盡管二者的(de)工(gong)作原理(li)是(shi)(shi)一樣(yang)的(de)，但是(shi)(shi)實際上低頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)和(he)(he)高(gao)(gao)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)的(de)測(ce)(ce)試(shi)(shi)(shi)原理(li)不一樣(yang)的(de)。在(zai)進(jin)(jin)行測(ce)(ce)試(shi)(shi)(shi)的(de)過程(cheng)(cheng)中，低頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)可以(yi)直接對交(jiao)流(liu)電(dian)(dian)進(jin)(jin)行變(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)，它測(ce)(ce)試(shi)(shi)(shi)的(de)項目(mu)主要是(shi)(shi)輸(shu)(shu)出電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)以(yi)及相關的(de)參(can)數。包括空載(zai)(zai)輸(shu)(shu)入電(dian)(dian)流(liu)、空載(zai)(zai)輸(shu)(shu)出電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)、帶載(zai)(zai)輸(shu)(shu)入電(dian)(dian)流(liu)、帶載(zai)(zai)輸(shu)(shu)出電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)、效(xiao)率和(he)(he)耐壓(ya)(ya)(ya)(ya)(ya)程(cheng)(cheng)度(du)等(deng)。而高(gao)(gao)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)需(xu)要配合電(dian)(dian)路才能(neng)工(gong)作，所以(yi)它的(de)測(ce)(ce)試(shi)(shi)(shi)項目(mu)主要是(shi)(shi)與此(ci)相關的(de)性(xing)能(neng)測(ce)(ce)試(shi)(shi)(shi)，其測(ce)(ce)試(shi)(shi)(shi)的(de)主要內容(rong)包括電(dian)(dian)感(gan)量、漏感(gan)、匝(za)數比和(he)(he)耐壓(ya)(ya)(ya)(ya)(ya)程(cheng)(cheng)度(du)。

　　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)電(dian)源(yuan)(yuan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)與普通的(de)(de)(de)(de)(de)電(dian)源(yuan)(yuan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)可以互(hu)相替換(huan)使用(yong)嗎?答案當然是：不能(neng)。目前市面上(shang)(shang)常(chang)(chang)見(jian)的(de)(de)(de)(de)(de)印象電(dian)源(yuan)(yuan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)，其實用(yong)的(de)(de)(de)(de)(de)大(da)(da)多都是環(huan)(huan)型變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)。在(zai)(zai)實際應用(yong)中環(huan)(huan)形(xing)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)又(you)常(chang)(chang)常(chang)(chang)被叫做“環(huan)(huan)牛”，這種形(xing)式(shi)的(de)(de)(de)(de)(de)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)安裝(zhuang)方便，轉換(huan)效率也(ye)很高(gao)，同時還具(ju)有漏(lou)磁小(xiao)的(de)(de)(de)(de)(de)特性。在(zai)(zai)重(zhong)量上(shang)(shang)環(huan)(huan)形(xing)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)比(bi)層疊式(shi)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)重(zhong)量可以減(jian)輕一半，也(ye)比(bi)普通的(de)(de)(de)(de)(de)方型變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)成(cheng)本低，在(zai)(zai)制作(zuo)工藝上(shang)(shang)其繞(rao)組均(jun)勻緊緊包住環(huan)(huan)形(xing)鐵(tie)心，有效地減(jian)小(xiao)磁致伸(shen)縮引起(qi)的(de)(de)(de)(de)(de)噪音(yin)，還有利于散熱。而(er)之(zhi)所以開(kai)(kai)關(guan)(guan)電(dian)源(yuan)(yuan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)無法應用(yong)在(zai)(zai)音(yin)響(xiang)電(dian)源(yuan)(yuan)上(shang)(shang)，是因為開(kai)(kai)關(guan)(guan)電(dian)源(yuan)(yuan)的(de)(de)(de)(de)(de)高(gao)頻(pin)干擾實在(zai)(zai)太嚴重(zhong)，會大(da)(da)大(da)(da)影(ying)響(xiang)音(yin)響(xiang)的(de)(de)(de)(de)(de)音(yin)質。