TRANSFORMATOR (transformo — tabdil mediham) dar tekhnika, tajhizotest baroi tabdili yagon khususiyati muhimmi energiya yo khud obekt.
Transformatori elektri va gidrotransformatorho beshtar mamuland. In guna transformattorho tajhizotero memonand va onho baroi tagyiri buzurgihoi fizikie (masalan, baroi tagyiri shiddat, quvvai jarayon, momenti charkhzani) isgifoda meshavand, ki energiyai elektri va mekhanikiro tavsif medihand.