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升壓變壓器是怎樣變換電壓的？

發布日期：2018-11-15 00:00 來源：//800kk.cn 點擊：

變壓(ya)器是根(gen)據電(dian)磁感應制成的。它由一個用硅鋼片(pian)(pian)(或矽鋼片(pian)(pian))疊成的鐵(tie)(tie)芯和繞在鐵(tie)(tie)芯上的兩組線圈構成，鐵(tie)(tie)芯與線圈間彼(bi)此相互絕(jue)緣，沒有任何電(dian)的聯系。

將變壓(ya)器和電(dian)源(yuan)一側(ce)連接的(de)線圈(quan)叫(jiao)(jiao)初(chu)級(ji)(ji)線圈(quan)(或叫(jiao)(jiao)原(yuan)邊)，把(ba)變壓(ya)器和用電(dian)設(she)備連接的(de)線圈(quan)叫(jiao)(jiao)作次級(ji)(ji)線圈(quan)(或副邊)。當(dang)將變壓(ya)器的(de)初(chu)級(ji)(ji)線圈(quan)接到交流(liu)電(dian)源(yuan)上時，鐵芯(xin)中就會(hui)產生變化的(de)磁力線。

由于(yu)次級線(xian)(xian)圈(quan)(quan)繞在同(tong)一(yi)鐵芯上(shang)，磁力線(xian)(xian)切割(ge)次級線(xian)(xian)圈(quan)(quan)，次級線(xian)(xian)圈(quan)(quan)上(shang)必然產生感應電(dian)動勢，使線(xian)(xian)圈(quan)(quan)兩(liang)端出現(xian)電(dian)壓。因磁力線(xian)(xian)是(shi)交變的(de)，所以次級線(xian)(xian)圈(quan)(quan)的(de)電(dian)壓也是(shi)交變的(de)。而(er)且(qie)頻率與電(dian)源(yuan)頻率完全相同(tong)。

經理論證(zheng)實(shi)，變(bian)壓(ya)(ya)器(qi)初(chu)級(ji)(ji)線(xian)(xian)圈(quan)(quan)(quan)與次(ci)(ci)級(ji)(ji)線(xian)(xian)圈(quan)(quan)(quan)電(dian)壓(ya)(ya)比(bi)和初(chu)級(ji)(ji)線(xian)(xian)圈(quan)(quan)(quan)與次(ci)(ci)級(ji)(ji)線(xian)(xian)圈(quan)(quan)(quan)的匝數比(bi)值有關，可用下(xia)式表示：初(chu)級(ji)(ji)線(xian)(xian)圈(quan)(quan)(quan)電(dian)壓(ya)(ya)/次(ci)(ci)級(ji)(ji)線(xian)(xian)圈(quan)(quan)(quan)電(dian)壓(ya)(ya)=初(chu)級(ji)(ji)線(xian)(xian)圈(quan)(quan)(quan)匝數/次(ci)(ci)級(ji)(ji)線(xian)(xian)圈(quan)(quan)(quan)匝數說明匝數越多，電(dian)壓(ya)(ya)就越高。因此可以看出，次(ci)(ci)級(ji)(ji)線(xian)(xian)圈(quan)(quan)(quan)比(bi)初(chu)級(ji)(ji)線(xian)(xian)圈(quan)(quan)(quan)少，就是降壓(ya)(ya)變(bian)壓(ya)(ya)器(qi)。相反則為升壓(ya)(ya)變(bian)壓(ya)(ya)器(qi)。