電源適配器雖然不大(da)(da)(da)，但它(ta)所(suo)包含的知(zhi)識實在是(shi)(shi)太多了(le)，以(yi)往總(zong)是(shi)(shi)給大(da)(da)(da)家講(jiang)解(jie)一些(xie)電(dian)源(yuan)適(shi)配器(qi)(qi)的常識性知(zhi)識或者問題，那些(xie)都(dou)是(shi)(shi)很常見的，今天我(wo)們就來給大(da)(da)(da)家聊一聊電(dian)源(yuan)適(shi)配器(qi)(qi)一些(xie)冷門的知(zhi)識，借以(yi)加強(qiang)大(da)(da)(da)家對(dui)電(dian)源(yuan)適(shi)配器(qi)(qi)全(quan)方(fang)位(wei)的了(le)解(jie)，那么我(wo)們一起(qi)來看(kan)看(kan)其都(dou)有哪些(xie)鮮(xian)為人(ren)知(zhi)的秘密：

　　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)源(yuan)輸(shu)(shu)入(ru)(ru)(ru)隔(ge)(ge)離(li)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)，這(zhe)個(ge)名(ming)詞(ci)看上去似乎非常(chang)的高大(da)上，也常(chang)常(chang)讓一些剛開始接(jie)觸電(dian)(dian)(dian)子工(gong)程技術學習的新人工(gong)程師們感到無從下手。實際上這(zhe)個(ge)名(ming)詞(ci)背后的含義，指(zhi)的是在電(dian)(dian)(dian)源(yuan)的輸(shu)(shu)出(chu)端(duan)接(jie)入(ru)(ru)(ru)一個(ge)隔(ge)(ge)離(li)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)，歸(gui)根結底這(zhe)一定義主(zhu)要還是對(dui)隔(ge)(ge)離(li)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)的拓展(zhan)理解。在電(dian)(dian)(dian)源(yuan)輸(shu)(shu)入(ru)(ru)(ru)端(duan)接(jie)入(ru)(ru)(ru)一個(ge)隔(ge)(ge)離(li)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)后，隔(ge)(ge)離(li)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)初次級線圈隔(ge)(ge)離(li)，從而(er)能夠(gou)保障電(dian)(dian)(dian)源(yuan)系統安全(quan)運行(xing)。這(zhe)也是電(dian)(dian)(dian)源(yuan)輸(shu)(shu)入(ru)(ru)(ru)隔(ge)(ge)離(li)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)的主(zhu)要作(zuo)用(yong)。通(tong)常(chang)來看，隔(ge)(ge)離(li)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)大(da)多適(shi)用(yong)于輸(shu)(shu)電(dian)(dian)(dian)范(fan)(fan)圍(wei)小，線路短的供(gong)電(dian)(dian)(dian)范(fan)(fan)圍(wei)。而(er)目前不(bu)少電(dian)(dian)(dian)器(qi)(qi)都(dou)是直接(jie)接(jie)入(ru)(ru)(ru)220V市電(dian)(dian)(dian)電(dian)(dian)(dian)網，用(yong)電(dian)(dian)(dian)器(qi)(qi)使(shi)用(yong)的是低電(dian)(dian)(dian)壓(ya)(ya)，故需要通(tong)過電(dian)(dian)(dian)源(yuan)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)進(jin)行(xing)降壓(ya)(ya)。如(ru)果不(bu)使(shi)用(yong)隔(ge)(ge)離(li)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)可能就存(cun)在觸電(dian)(dian)(dian)的危險，因此在電(dian)(dian)(dian)源(yuan)輸(shu)(shu)入(ru)(ru)(ru)端(duan)接(jie)入(ru)(ru)(ru)一個(ge)隔(ge)(ge)離(li)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)，能夠(gou)有效保障電(dian)(dian)(dian)器(qi)(qi)的安全(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

　　在電(dian)源(yuan)變(bian)(bian)壓(ya)(ya)(ya)器的應(ying)用過程中(zhong)，按照不(bu)同(tong)的工(gong)作頻(pin)(pin)率來對變(bian)(bian)壓(ya)(ya)(ya)器產品進(jin)行劃分，通常可以(yi)分成低頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器和高(gao)(gao)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器兩(liang)種。盡管二者的工(gong)作原理是(shi)一樣(yang)的，但(dan)是(shi)實際上低頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器和高(gao)(gao)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器的測試原理不(bu)一樣(yang)的。在進(jin)行測試的過程中(zhong)，低頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器可以(yi)直接對交流(liu)電(dian)進(jin)行變(bian)(bian)壓(ya)(ya)(ya)，它(ta)測試的項(xiang)目(mu)(mu)主(zhu)要(yao)是(shi)輸(shu)出電(dian)壓(ya)(ya)(ya)以(yi)及(ji)相關的參數(shu)。包(bao)括空載輸(shu)入電(dian)流(liu)、空載輸(shu)出電(dian)壓(ya)(ya)(ya)、帶載輸(shu)入電(dian)流(liu)、帶載輸(shu)出電(dian)壓(ya)(ya)(ya)、效率和耐壓(ya)(ya)(ya)程度(du)等。而(er)高(gao)(gao)頻(pin)(pin)變(bian)(bian)壓(ya)(ya)(ya)器需要(yao)配合電(dian)路(lu)才(cai)能工(gong)作，所以(yi)它(ta)的測試項(xiang)目(mu)(mu)主(zhu)要(yao)是(shi)與此相關的性能測試，其測試的主(zhu)要(yao)內(nei)容包(bao)括電(dian)感量、漏(lou)感、匝數(shu)比和耐壓(ya)(ya)(ya)程度(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)(yin)響電(dian)(dian)(dian)源(yuan)(yuan)變(bian)壓(ya)(ya)(ya)器與普(pu)通(tong)的電(dian)(dian)(dian)源(yuan)(yuan)變(bian)壓(ya)(ya)(ya)器可以互相替換使用(yong)嗎?答案當(dang)然是(shi)：不能。目(mu)前市面上(shang)(shang)(shang)常(chang)見的印(yin)象電(dian)(dian)(dian)源(yuan)(yuan)變(bian)壓(ya)(ya)(ya)器，其實(shi)用(yong)的大(da)多都是(shi)環(huan)型變(bian)壓(ya)(ya)(ya)器。在(zai)實(shi)際應用(yong)中環(huan)形變(bian)壓(ya)(ya)(ya)器又(you)常(chang)常(chang)被叫(jiao)做“環(huan)牛”，這種形式(shi)的變(bian)壓(ya)(ya)(ya)器安裝方便，轉換效率也很高，同時還具有漏磁(ci)(ci)小的特性(xing)。在(zai)重量上(shang)(shang)(shang)環(huan)形變(bian)壓(ya)(ya)(ya)器比(bi)層疊式(shi)變(bian)壓(ya)(ya)(ya)器重量可以減輕一半，也比(bi)普(pu)通(tong)的方型變(bian)壓(ya)(ya)(ya)器的成本低，在(zai)制作工藝上(shang)(shang)(shang)其繞(rao)組均勻(yun)緊(jin)緊(jin)包住環(huan)形鐵心，有效地減小磁(ci)(ci)致伸縮引起的噪(zao)音(yin)(yin)，還有利于散熱(re)。而(er)之(zhi)所以開關(guan)電(dian)(dian)(dian)源(yuan)(yuan)變(bian)壓(ya)(ya)(ya)器無法應用(yong)在(zai)音(yin)(yin)響電(dian)(dian)(dian)源(yuan)(yuan)上(shang)(shang)(shang)，是(shi)因(yin)為開關(guan)電(dian)(dian)(dian)源(yuan)(yuan)的高頻干(gan)擾實(shi)在(zai)太嚴重，會(hui)大(da)大(da)影響音(yin)(yin)響的音(yin)(yin)質。