变压器是根据电磁感应的原理制成的.在在闭合的铁芯柱上面绕有两个绕组,一个原绕组,和一个副绕组.当原绕组加上交流电源电压时.原饶组流有交变电流,而建立磁势,在磁势的作用下铁芯中便产生交变主磁通,主磁通在铁芯中同时穿过,{交链]一.二次绕组而闭合由于电磁感应作用分别在一、二次绕组产生感应电动势，至于为什么它可以升压和降压呢？那就需要用楞次定律来解释了，感应电流产生的磁通，总阻碍原磁通的变化，当原磁通增加时感应电流的产生的磁通与与原磁通相反, 就是说二次绕组所产生 的感应磁通与原绕组所产生的主磁通相反，所以二次绕组就出现了低等级的交变电压所以铁芯是变压器的磁路部，绕组是变压器的电路部分.
The transformer is made according to the principle of electromagnetic induction. There are two windings, one original winding and one secondary winding, winding on the closed core column. When the original winding is added with AC power supply voltage, the current of the original Rao winding has alternating current, and the establishment of magnetic potential will produce alternating main flux in the core under the action of magnetic potential. The main flux is in the core at the same time. Through, {cross-link] primary and secondary windings closed due to electromagnetic induction in the first and second windings respectively generate induced electromotive force, as to why it can boost and buck? Then we need to use Lenz's law to explain that the flux produced by induced current always hinders the change of the original flux. When the original flux increases, the flux produced by induced current is opposite to the original flux, that is to say, the induced flux produced by secondary winding is opposite to the main flux produced by the original winding, so the secondary winding appears low. Grade of alternating voltage, so the core is the magnetic circuit part of the transformer, winding is the circuit part of the transformer.