隔離(li)變(bian)壓(ya)(ya)(ya)器(qi)(qi)的(de)(de)主要作用(yong)(yong)是(shi)實(shi)現電(dian)氣隔離(li),保證設備和(he)人員的(de)(de)安全。它通過電(dian)磁感(gan)應(ying)原理工(gong)作,利用(yong)(yong)變(bian)壓(ya)(ya)(ya)器(qi)(qi)的(de)(de)電(dian)磁轉換工(gong)作原理,將(jiang)輸入(ru)(ru)電(dian)壓(ya)(ya)(ya)升高或降(jiang)低,輸出(chu)(chu)一(yi)(yi)個(ge)與輸入(ru)(ru)電(dian)壓(ya)(ya)(ya)不同(tong)的(de)(de)電(dian)壓(ya)(ya)(ya)。隔離(li)變(bian)壓(ya)(ya)(ya)器(qi)(qi)通常采用(yong)(yong)雙繞(rao)組(zu)結構,即有兩個(ge)線(xian)(xian)圈(quan)(quan),一(yi)(yi)個(ge)為(wei)初(chu)繞(rao)組(zu)輸入(ru)(ru)線(xian)(xian)圈(quan)(quan),另一(yi)(yi)個(ge)為(wei)次繞(rao)組(zu)輸出(chu)(chu)線(xian)(xian)圈(quan)(quan),兩個(ge)線(xian)(xian)圈(quan)(quan)之間是(shi)完(wan)全隔離(li)的(de)(de)。當輸入(ru)(ru)電(dian)壓(ya)(ya)(ya)加在(zai)輸入(ru)(ru)線(xian)(xian)圈(quan)(quan)上時(shi),磁場將(jiang)發生(sheng)變(bian)化,從而(er)在(zai)輸出(chu)(chu)線(xian)(xian)圈(quan)(quan)中(zhong)產生(sheng)感(gan)應(ying)電(dian)動勢。通過調整輸入(ru)(ru)和(he)輸出(chu)(chu)線(xian)(xian)圈(quan)(quan)的(de)(de)匝數比,可以得到(dao)相同(tong)或者不同(tong)的(de)(de)輸出(chu)(chu)電(dian)壓(ya)(ya)(ya)。
隔離變壓(ya)器在電(dian)力系統中被廣(guang)泛應用(yong)(yong)于高壓(ya)和(he)(he)低壓(ya)配電(dian)系統中,主要用(yong)(yong)于電(dian)氣設備(bei)安裝或維(wei)修方面,可(ke)防(fang)止電(dian)擊(ji)事(shi)故和(he)(he)短路等危(wei)險(xian)情(qing)況(kuang)的發生(sheng)。它還可(ke)以(yi)用(yong)(yong)于UPS電(dian)源、機房末端等,以(yi)減(jian)少零地電(dian)壓(ya)對弱電(dian)設備(bei)電(dian)干(gan)擾,同時也(ye)可(ke)以(yi)減(jian)小諧波干(gan)擾和(he)(he)雷擊(ji)等對電(dian)力系統的影響(xiang)。
此外(wai),隔離(li)變壓器(qi)還具有防干擾(rao)的(de)作(zuo)用,可以廣泛用于(yu)(yu)電(dian)(dian)子(zi)工(gong)業或工(gong)礦企業、機床和機械設備(bei)中一般電(dian)(dian)路(lu)的(de)控制電(dian)(dian)源(yuan)、安全照明及指(zhi)示燈的(de)電(dian)(dian)源(yuan)之用。在醫(yi)(yi)療(liao)領域中,隔離(li)變壓器(qi)可以用于(yu)(yu)手術室(shi)、ICU等需要(yao)高(gao)度安全的(de)場(chang)所,將醫(yi)(yi)療(liao)設備(bei)與主電(dian)(dian)源(yuan)隔離(li),保證(zheng)醫(yi)(yi)生和病人的(de)安全。
總的來說,隔離(li)變壓器是一種非常重要的電(dian)(dian)氣設備(bei),在(zai)電(dian)(dian)氣設備(bei)上(shang)面隨處可見。其主要作(zuo)用(yong)是實現電(dian)(dian)氣隔離(li),保證設備(bei)和人員的安全。