is a static device by means of which electrical power is transformed from one alternating-current circuit to another with the desired change in voltage and current without causing any change in frequency.
Primary Winding
This winding is excited or energized by connecting it to an input source.
Secondary Winding
This winding is the one to which the electrical load is connected and from which the output energy is taken.
Core-type Construction
each winding consists of two sections—one section placed on each of the two legs of the core—and the primary and secondary windings are arranged to be concentric coils.
Shell-type Construction
the windings usually consist of thin “pancake” coils assembled in a stack, with primary and secondary coils interleaved.
Dry transformers
have simple natural air cooling or are sometimes sealed into cabinets filled with nitrogen.
Mutual Induction
The physical basis of a transformer between two circuits linked by a common magnetic flux.
Ideal Transformer
is a lossless device with an input winding and an output
winding.