人們在開關電源技(ji)術(shu)領域是(shi)邊開發相關(guan)電力電子(zi)器件，邊開發開關(guan)變頻技(ji)術(shu)，兩者相互促進(jin)推動著開關(guan)電源每年以(yi)超過兩位數(shu)字的(de)增(zeng)長(chang)率向著輕、小(xiao)、薄(bo)、低噪聲(sheng)、高可(ke)(ke)靠、抗干擾的(de)方向發展(zhan)。開關(guan)電源可(ke)(ke)分為AC/DC和DC/DC兩大類。

微型低功(gong)率開關電(dian)源
　　開(kai)關(guan)(guan)電(dian)源(yuan)正在(zai)走向大(da)(da)眾(zhong)化，微型化。開(kai)關(guan)(guan)電(dian)源(yuan)將(jiang)逐步取代(dai)變壓器在(zai)生活中的(de)所有應用(yong)，低功率微型開(kai)關(guan)(guan)電(dian)源(yuan)的(de)應用(yong)要首先體現(xian)在(zai)，數顯表、智能電(dian)表、手機(ji)充電(dian)器等方(fang)面。現(xian)階段國家在(zai)大(da)(da)力(li)推(tui)廣智能電(dian)網建設，對電(dian)能表的(de)要求大(da)(da)幅提高，開(kai)關(guan)(guan)電(dian)源(yuan)將(jiang)逐步取代(dai)變壓器在(zai)電(dian)能表上(shang)面的(de)應用(yong)。
反轉式串聯開關電源
　　反轉式(shi)串(chuan)聯(lian)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)與(yu)一般(ban)(ban)串(chuan)聯(lian)式(shi)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)的區別是，這(zhe)種反轉式(shi)串(chuan)聯(lian)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)出(chu)(chu)的電(dian)(dian)(dian)(dian)壓(ya)是負電(dian)(dian)(dian)(dian)壓(ya)，正好與(yu)一般(ban)(ban)串(chuan)聯(lian)式(shi)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)出(chu)(chu)的正電(dian)(dian)(dian)(dian)壓(ya)極性相反；并且由于儲(chu)能電(dian)(dian)(dian)(dian)感L只在開(kai)關(guan)(guan)K關(guan)(guan)斷時才向負載輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)流，因此，在相同條(tiao)件下，反轉式(shi)串(chuan)聯(lian)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)出(chu)(chu)的電(dian)(dian)(dian)(dian)流比串(chuan)聯(lian)式(shi)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)出(chu)(chu)的電(dian)(dian)(dian)(dian)流小一倍。