Transformer is employing the principle of electromagnetic induction to 

adjust the AC voltage device, the main member is really a major coil, 

secondary coil and the iron core . Most important options are: voltage 

conversion, current transformation, impedance transformation, 

isolation, voltage regulator (magnetic saturation transformer) and so 

on. May be divided in line with purpose: distribution transformers, 

power transformers, hermetically sealed transformers, modular transformers,

dry kind transformers, oil immersed transformer, single phase 

transformers, furnace transformers, rectifier transformers.

In electrical gear and radio circuits, the transformer employed for 

lifting voltage, impedance matching, safety isolation. In a 

generator, regardless of the coil moves via the magnetic field or 

a magnetic field moves through the stationary coil, can EMF induced 

in the coil, in each cases, the flux values ??have been unchanged, but the 

quantity of a magnetic flux intersecting the coil there adjust, which 

is definitely the principle of mutual induction. Transformer is an 

electromagnetic mutual inductance, transform voltage, existing and 

impedance of the device.One of the most standard form from the transformer, 

including two sets of coils wound with wire, and said to each other 

in inductively combined together. When an AC present flow within the one 

on the group of coils, the coils within the other group will have the 

exact same frequency in the induced AC voltage, and the induced voltage 

is dependent upon the two coils and the magnetic coupling on the cross-

linking degree.