人們在開關電(dian)源(yuan)技(ji)術領域是邊(bian)開(kai)發(fa)相關(guan)(guan)(guan)電力電子器件，邊(bian)開(kai)發(fa)開(kai)關(guan)(guan)(guan)變頻技(ji)術，兩(liang)者相互(hu)促進(jin)推動著開(kai)關(guan)(guan)(guan)電源每年以(yi)超過兩(liang)位(wei)數(shu)字(zi)的增長率(lv)向著輕、小(xiao)、薄、低噪聲、高可(ke)靠、抗(kang)干擾(rao)的方向發(fa)展。開(kai)關(guan)(guan)(guan)電源可(ke)分為AC/DC和DC/DC兩(liang)大類。

微型低功率開關(guan)電源
　　開(kai)關(guan)電(dian)源正在(zai)走向大(da)眾化，微(wei)型化。開(kai)關(guan)電(dian)源將逐步取代變壓(ya)器在(zai)生活中的(de)所有應用(yong)，低功率(lv)微(wei)型開(kai)關(guan)電(dian)源的(de)應用(yong)要首先體現(xian)在(zai)，數顯表、智能電(dian)表、手機(ji)充(chong)電(dian)器等方(fang)面。現(xian)階段國(guo)家在(zai)大(da)力推廣智能電(dian)網建(jian)設，對電(dian)能表的(de)要求大(da)幅提高，開(kai)關(guan)電(dian)源將逐步取代變壓(ya)器在(zai)電(dian)能表上(shang)面的(de)應用(yong)。
反轉式(shi)串聯開關(guan)電源(yuan)
　　反(fan)轉式(shi)串(chuan)聯(lian)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)源(yuan)與(yu)一般串(chuan)聯(lian)式(shi)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)源(yuan)的(de)區別是，這種反(fan)轉式(shi)串(chuan)聯(lian)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)源(yuan)輸(shu)(shu)出(chu)(chu)的(de)電(dian)(dian)(dian)(dian)壓是負電(dian)(dian)(dian)(dian)壓，正好與(yu)一般串(chuan)聯(lian)式(shi)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)源(yuan)輸(shu)(shu)出(chu)(chu)的(de)正電(dian)(dian)(dian)(dian)壓極性相反(fan)；并且由(you)于儲能(neng)電(dian)(dian)(dian)(dian)感L只在(zai)開(kai)(kai)關(guan)K關(guan)斷時才向負載輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)流，因此，在(zai)相同(tong)條件(jian)下，反(fan)轉式(shi)串(chuan)聯(lian)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)源(yuan)輸(shu)(shu)出(chu)(chu)的(de)電(dian)(dian)(dian)(dian)流比串(chuan)聯(lian)式(shi)開(kai)(kai)關(guan)電(dian)(dian)(dian)(dian)源(yuan)輸(shu)(shu)出(chu)(chu)的(de)電(dian)(dian)(dian)(dian)流小一倍。