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      變(bian)壓(ya)器(qi)是變(bian)換交(jiao)(jiao)流(liu)(liu)電(dian)(dian)(dian)壓(ya)、電(dian)(dian)(dian)流(liu)(liu)和阻抗的(de)器(qi)件，當(dang)初級線(xian)圈(quan)中通有(you)交(jiao)(jiao)流(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)時，鐵芯(或磁(ci)芯)中便產生(sheng)交(jiao)(jiao)流(liu)(liu)磁(ci)通，使次級線(xian)圈(quan)中感(gan)應(ying)出(chu)電(dian)(dian)(dian)壓(ya)(或電(dian)(dian)(dian)流(liu)(liu))。隨著(zhu)變(bian)壓(ya)器(qi)行(xing)業(ye)(ye)的(de)不斷發展，越來越多的(de)行(xing)業(ye)(ye)和企(qi)業(ye)(ye)運用上(shang)變(bian)壓(ya)器(qi)，越來越多的(de)企(qi)業(ye)(ye)進入了變(bian)壓(ya)器(qi)行(xing)業(ye)(ye)，變(bian)壓(ya)器(qi)由鐵芯(或磁(ci)芯)和線(xian)圈(quan)組(zu)(zu)成，線(xian)圈(quan)有(you)兩(liang)(liang)個或兩(liang)(liang)個以上(shang)的(de)繞(rao)(rao)組(zu)(zu)，其(qi)中接電(dian)(dian)(dian)源的(de)繞(rao)(rao)組(zu)(zu)叫初級線(xian)圈(quan)，其(qi)余的(de)繞(rao)(rao)組(zu)(zu)叫次級線(xian)圈(quan)。