隔離電源模塊與非隔離電源模塊有什么“天壤之別”
1.安全性
隔(ge)(ge)(ge)(ge)離(li)電(dian)(dian)(dian)(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)是指隔(ge)(ge)(ge)(ge)離(li)電(dian)(dian)(dian)(dian)(dian)源(yuan)是使用(yong)(yong)變(bian)(bian)(bian)壓(ya)(ya)器(qi)將(jiang)各(ge)種(zhong)不(bu)同電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)（如(ru)：220VAC，48VDC，24VDC，12VDC等(deng)）通(tong)過(guo)(guo)變(bian)(bian)(bian)壓(ya)(ya)器(qi)將(jiang)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)降到所需要的電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，然(ran)后作為負載供電(dian)(dian)(dian)(dian)(dian)使用(yong)(yong)。非隔(ge)(ge)(ge)(ge)離(li)電(dian)(dian)(dian)(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)是將(jiang)各(ge)種(zhong)不(bu)同電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)（如(ru)：220VAC，48VDC，24VDC，12VDC等(deng)）直接引(yin)入到電(dian)(dian)(dian)(dian)(dian)子電(dian)(dian)(dian)(dian)(dian)路，再通(tong)過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)子元件(jian)進(jin)行(xing)升降壓(ya)(ya)輸出，輸入輸出是通(tong)過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)子元件(jian)直接連(lian)接的，中間并沒有經(jing)過(guo)(guo)變(bian)(bian)(bian)壓(ya)(ya)器(qi)等(deng)帶隔(ge)(ge)(ge)(ge)離(li)性(xing)的器(qi)件(jian)，所以稱非隔(ge)(ge)(ge)(ge)離(li)電(dian)(dian)(dian)(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)。作為一個讓最終用(yong)(yong)戶能安全使用(yong)(yong)的產(chan)品，工程師在(zai)設計(ji)電(dian)(dian)(dian)(dian)(dian)源(yuan)方案(an)時一般都會考慮系(xi)統的絕緣以及隔(ge)(ge)(ge)(ge)離(li)的可靠性(xing)。相(xiang)比(bi)之(zhi)下，隔(ge)(ge)(ge)(ge)離(li)電(dian)(dian)(dian)(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)相(xiang)比(bi)非隔(ge)(ge)(ge)(ge)離(li)電(dian)(dian)(dian)(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)安全性(xing)更高(gao)一些。
2.效率
非隔(ge)離電(dian)(dian)源(yuan)(yuan)模(mo)塊(kuai)由(you)于少了(le)變(bian)壓的(de)(de)磁電(dian)(dian)轉換所損失的(de)(de)能量，所以效率(lv)(lv)一般較高，行業(ye)中大(da)多電(dian)(dian)源(yuan)(yuan)廠家的(de)(de)非隔(ge)離電(dian)(dian)源(yuan)(yuan)模(mo)塊(kuai)的(de)(de)效率(lv)(lv)都能達(da)到91%以上。相比之下(xia)(xia)，隔(ge)離電(dian)(dian)源(yuan)(yuan)模(mo)塊(kuai)一般效率(lv)(lv)都在88%以下(xia)(xia)，所以隔(ge)離電(dian)(dian)源(yuan)(yuan)模(mo)塊(kuai)發熱相對來說會(hui)比非隔(ge)離電(dian)(dian)源(yuan)(yuan)模(mo)塊(kuai)的(de)(de)大(da)。
3.成本與體積
非隔(ge)離(li)電(dian)源模(mo)塊(kuai)由于(yu)不(bu)需(xu)要采用變壓器(qi)進行輸入輸出之(zhi)間的(de)電(dian)氣隔(ge)離(li)，所以(yi)相(xiang)比電(dian)源模(mo)塊(kuai)，同(tong)(tong)樣的(de)輸出功率(lv)，同(tong)(tong)樣的(de)輸出性能，非隔(ge)離(li)電(dian)源模(mo)塊(kuai)所需(xu)要的(de)體積更小，成本更低，設計難度(du)更小。如(ru)果說(shuo)設計上可以(yi)考慮(lv)輸入輸出之(zhi)間不(bu)隔(ge)離(li)，相(xiang)比隔(ge)離(li)電(dian)源模(mo)塊(kuai)，采用非隔(ge)離(li)電(dian)源模(mo)塊(kuai)來進行設計那可以(yi)說(shuo)是工(gong)程師的(de)首選(xuan)。
4.帶載范圍
隔離電源模塊的輸出帶載范圍小于非隔離電源模塊帶載范圍。
一(yi)般來講(jiang)隔(ge)離(li)電源(yuan)模(mo)塊的(de)輸(shu)出帶(dai)載(zai)范(fan)(fan)圍為(wei)(wei)30-42V，非隔(ge)離(li)電源(yuan)模(mo)塊帶(dai)載(zai)范(fan)(fan)圍可以為(wei)(wei)30-84V。眾(zhong)多廠家在(zai)(zai)選擇(ze)電源(yuan)的(de)時(shi)候(hou)為(wei)(wei)了整體的(de)適(shi)(shi)應性都要求電源(yuan)能夠適(shi)(shi)應全電壓90-265V輸(shu)入，帶(dai)載(zai)范(fan)(fan)圍也要求高達84V,這(zhe)樣的(de)選擇(ze)是存在(zai)(zai)一(yi)定風(feng)險(xian)和隱患的(de)。90V輸(shu)入的(de)時(shi)候(hou)電源(yuan)可能喪失恒流功能，這(zhe)些非隔(ge)離(li)適(shi)(shi)合做高壓小電流，做大電流成(cheng)本并不比隔(ge)離(li)的(de)便宜。
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