ABSTRACT
Transformers operate on principles that are very similar to those of electric machines. This is why their discussion in a machine book is important and even necessary: they can be considered stationary machines. This chapters introduces the underlying physical laws related to induction (Faraday's law and Lenz's law) and how they make a transformer work. This chapter then discusses the equivalent circuit of ideal and real transformers and how the circuit parameters can be determined based on performing standard tests. Three-phase, auto, instrument, and three-winding transformers are also discussed.
