Transformer and types

Transformer 

Transformer is a static device (does not have any moving/rotating parts)

Transformer has two windings: primary & secondary.

Transformer works on the principle of mutual induction between two coils.

Transformer transfers electrical energy from one circuit to another circuit

with change in voltage &/or current.

Transformer transfers electrical energy without change in frequency.

Supply is given to primary winding & output is taken from secondary winding.

Different types of transformer are

core type

shell type

Berry type

Transformer consists of two windings that are electrically isolated from each other. When a time

varying voltage is applied to one winding, it sets up an alternating flux in the magnetic core. Due to

the high permeability of the core, most of the flux links the other winding and induces and

alternating e.m.f. in that winding. The frequency of the induced e.m.f. in the winding is same as that

of the voltage in the first winding. If the other winding is connected to the load, the induced e.m.f. in

the winding circulate a current in it. Thus, the power is transferred from one winding to the other

through the magnetic flux in the core.

[ This answer is enough for explaining construction of transformer]

[The transformer consists of following

i) magnetic circuit consisting of links (core), yokes and clamping structures (providing the

flux path)

ii) Electric circuit consisting of primary and secondary windings

iii) dielectric circuit consisting of insulation in different forms and used at different places in

the transformer (core to the primary winding, primary winding to secondary winding

etc).

iv) Tank and accessories] this is optional answer.

Principle of transformer:

The operation of the transformer is based on the principle of mutual induction between two circuitslinked by a common magnetic field.