Lub transformer yog ib qho khoom siv uas siv lub hauv paus ntsiab lus ntawm electromagnetic induction los hloov AC voltage, thiab nws cov khoom tseem ceeb yog thawj kauj, theem nrab kauj, thiab hlau core (sib nqus core). Hauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob wireless, feem ntau yog siv rau kev tswj hluav taws xob, kev sib txuam impedance, kev sib cais kev nyab xeeb, thiab lwm yam. Nyob rau hauv lub tshuab hluav taws xob, seb lub kauj yog txav los ntawm cov hlau nplaum los yog cov hlau nplaum yog txav los ntawm cov kauj, nws tuaj yeem ua rau muaj kev cuam tshuam. electromotive quab yuam nyob rau hauv lub coil. Nyob rau hauv ob qho tib si, tus nqi ntawm magnetic flux tseem tsis hloov, tab sis tus naj npawb ntawm magnetic flux intersecting lub kauj sib txawv, uas yog lub hauv paus ntsiab lus ntawm kev sib nrig sib inductance. Transformer yog ib qho khoom siv uas siv cov khoom siv hluav taws xob sib txuas ua ke los hloov qhov voltage, tam sim no, thiab impedance.
