Lub luag haujlwm tseem ceeb ntawm tus transformer yog hloov cov qib hluav taws xob ntawm lwm yam tam sim no (AC), kev faib tawm, thiab nyab xeeb siv lub zog hluav taws xob. Tshwj xeeb, kev hloov pauv siv lub hauv paus ntsiab lus ntawm kev siv hluav taws xob hauv hluav taws xob thaum tswj lub zog txuas ntxiv thaum lub zog tsis tu ncua). Cov hauv qab no yog cov ncauj lus kom ntxaws ntxaws ntawm cov haujlwm ntawm transformer:
Voltage hloov dua siab tshiab: transformers tuaj yeem hloov siab dua {{voltage (piv txwv li.
Kev rho tawm hluav taws xob: Cov hloov hluav taws xob ua tau kev rho tawm hluav taws xob ntawm lub cev sib cais ntawm lub cev thiab cov khoom siv hluav taws xob ua kom muaj kev nyab xeeb thiab tiv thaiv kev pheej hmoo hluav taws xob.
Kev sib raug zoo: Hauv cov khoom siv hluav taws xob, cov hloov pauv hluav taws xob siv rau kev ua kom muaj kev cuam tshuam rau kev ua kom pom kev ntsuas cov paib (piv txwv li, cov tshuab hluav taws xob).
Ntau cov txiaj ntsig voltage: kev hloov pauv (piv txwv li, tswj cov hloov pauv) tuaj yeem muab ntau cov txiaj ntsig voltage kom tau raws li cov hluav taws xob kev xav tau ntawm cov khoom siv sib txawv.
Voltage stabilization thiab lim: qee yam hloov tshwj xeeb (xws li voltage stabilizing transformizing hloov pauv thiab txhim kho lub zog zoo.