Understanding Transformer Testing

By Paul Denisowski

Transformers play a pivotal role in electrical engineering, serving as indispensable components for voltage conversion in alternating current (AC) circuits. This application note delves into the technical intricacies of transformers commonly employed in electronics. While transformers come in various types, their fundamental function remains consistent: altering voltage levels through either step-up or step-down mechanisms. Often found in AC to DC power supplies, these compact devices facilitate safe and efficient power transfer.

This application note offers a comprehensive overview of measurement techniques tailored specifically for the smaller-scale transformers prevalent in indoor electronic applications. While similarities exist with larger outdoor transformers used in power distribution, this note primarily focuses on the nuances of testing methodologies pertinent to electronics, distinct from those dictated by broader standards bodies like the IEEE.