ABSTRACT
A transformer efficiently converts electric power from one voltage level to another. A transformer is two sets of coils coupled together through a magnetic field. The magnetic field transfers all of the energy (except in an autotransformer). In an ideal transformer, the voltages on the input and the output are related by the turns ratio of the transformer:
where N1 and N2 are the number of turns and V1 and V2 are the voltage on windings 1 and 2.
