變(bian)壓(ya)(ya)器(qi)是變(bian)換交流(liu)電(dian)(dian)壓(ya)(ya)、電(dian)(dian)流(liu)和(he)阻抗的(de)器(qi)件,當初(chu)(chu)級(ji)線(xian)圈(quan)中(zhong)通有(you)交流(liu)電(dian)(dian)流(liu)時,鐵(tie)(tie)芯(或磁芯)中(zhong)便產生(sheng)交流(liu)磁通,使次級(ji)線(xian)圈(quan)中(zhong)感應出電(dian)(dian)壓(ya)(ya)(或電(dian)(dian)流(liu))。隨著變(bian)壓(ya)(ya)器(qi)行業(ye)的(de)不斷發(fa)展,越來越多的(de)行業(ye)和(he)企業(ye)運用上變(bian)壓(ya)(ya)器(qi),越來越多的(de)企業(ye)進入了變(bian)壓(ya)(ya)器(qi)行業(ye),變(bian)壓(ya)(ya)器(qi)由鐵(tie)(tie)芯(或磁芯)和(he)線(xian)圈(quan)組(zu)成,線(xian)圈(quan)有(you)兩個或兩個以上的(de)繞組(zu),其(qi)中(zhong)接電(dian)(dian)源的(de)繞組(zu)叫初(chu)(chu)級(ji)線(xian)圈(quan),其(qi)余的(de)繞組(zu)叫次級(ji)線(xian)圈(quan)。