Ama-transformers kagesi angamadivayisi kagesi aklanyelwe ukudlulisa amandla kagesi phakathi kwamasekethe amabili noma ngaphezulu ngokungeniswa kwe-electromagnetic. Zisetshenziswa ngokuyinhloko kuzinhlelo zokusebenza ezinamandla amakhulu, okubenza babe yitshe legumbi lezinhlelo zokusebenza zikagesi. Umsebenzi wabo omkhulu ukunyusa (ukwandisa) noma kwehlise (ukwehla) amazinga kagesi, ukuqinisekisa ukuthi ugesi udluliselwa kahle kuyo yonke