construction of transformer | types of transformer

      CONSTRUCTION OF TRANSFORMER 

Construction of transformer:- Transformer consist of two coils having mutual inductance and a laminated steel core .The coils are insulated from each other and also to the steel core .Each winding of the transformer is wound on the core which provide the necessary magnetic circuit ,this magnetic circuit provide a path to flow the magnetic field.  

construction of transformer 

 Transformer have only two winding: 1)primary and 2)secondary.

                  Primary winding is connected to the voltage source and is also responsible for the production of magnetic flux whereas secondary winding is connected to the load in which induced e.m.f or current is produced by the mutual induction. The core is made out of transformer sheet steel laminations assembled to provide a continuous magnetic path with minimum of air-gap included. The steel should have high permeability and low hysteresis loss. For this to happen, the steel should be made of high silicon content and must also be heat treated.   By effectively laminating the core, the eddy-current losses can be reduced. The lamination can be done with the help of a light coat of core plate varnish or lay an oxide layer on the surface.

                      Types of the Transformer

There are many types of the transformer in our life so we classified each of them in a different category:-

On the basis of 

1. Position of the windings on the core:-
i) Core type
ii) Shell type
2. The transformation ratio or number of turns in the windings:-
i) Step up
ii) Step down
3. The services:-

i) Power transformer
ii) Distribution transformer
iii) Instrument transformer
iv) Current transformer
v) Potential transformer
vi) Auto-transformer
4. The supply:-

i) Single phase
ii) Three phase

So we discuss about construction of transformer that transformer has two coils and a core and also about types of transformer.