Wednesday, 21 February 2018

What is Working Principle Of Electrical Transformer???

Basic Of Electrical Transformer, And How Working Process Of  Electrical Transformer 



All About Electrical Transformer And Its Basic Knowledge And Basic Principle 






  • A transformer is a statie Electromagnetic Device consisting of two or more windings which link with a common magnetic field.
  • A transformer a device that Transfers Electric Power from one circuit to another without a change of frequency. 
  • It can raise or lower the voltage in a circuit but with a Corresponding Decrease or increase current 
In brief, a transformer in is an ac machine that





  • -> Transfers Electrical Energy from one circuit to another
  • ->does so without a Change Of Frequency
  • ->does so by the principle of Electro-magnetic Induction
  • ->has electric eircuits that are linked by a Common Magnetic Circuit.


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Since the basic Construction Of Transformer requires no moving part, requires minimum amount of repair and maintenance. The ene transfer usually takes place with a change of voltage, although this not always necessary.

When the transformer raises the voltage i e. when the output voltage of a transformer is higher than its input voltage, it is called the step- up and when it lowers the voltage, it is called the step-down transformer

A Simple Transformer consists of a ferromagnetic core or silicon steel core and two windings placed on it.
  •  The windings are electrically separated but magnetically linked through a path of low reluctance as shown in figer
  •  The windings are insulated from both the core and each other.
  •  The core is made of thin silicon steel laminations to provide nce to the magnetic flux. 
  • The winding connec to the supply mains is called the primary and the winding connected
To the load circuit is called the secondary. In other words, the winding In to the load from which drawn out is called Secondary Winding.

A transformer work on the principle of electromagnetic induction . I.e. mutual induction between two circuits linked by a Common Magnetic Flux .

When the primary winding is connected to an ac supply mains, a current flows through it. An alternating flux is set in the laminated core which links with the secondary winding and produces mutually induced emf in the secondary winding according to Faraday's laws of electromagnetic induction,

 e= M (dI/dt).

the secondary circuit is closed a current flows in it and therefore electrical energy is transferred from primary the secondary winding.

Question Parts On The Electrical Transformers :

1)Define the transformer??? 
Ans:A transformer is a statie electromagnetic device consisting of two or more windings which link with a common magnetic field.
  • A transformer a device that transfers electric power from one circuit to another without a change of frequency. 
  • It can raise or lower the voltage in a circuit but with a corresponding decrease or increase current 
2)when the output voltage of a transformer is higher than its input voltage, it is called _____???
Ans: step-up transformer

3) what is work of transformer?? 
Ans:transfers electrical energy from one circuit to another 
->does so without a change of frequency
->does so by the principle of electro-magnetic induction
->has electric eircuits that are linked by a common magnetic circuit.

4)the winding In to the load from which drawn out is called which winding???
Ans:secondary-winding

5)A transformer work on the which  principle???
Ans:electromagnetic induction


Challenging Example For Electrical Engineer

Ex :  A Transformer Have 500 turnes Of Primary Winding  And 10 Turnes Of Secondary Winding Than Determine The Current In Primary And Secondary Winding?? Given there the secondary winding connected with 15ohm resistance Load!! 

Hint : I2=V2/R

Comment Your Answer In Comments Box!! 



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1 comment:

  1. In the defination it is told that in transformer power can be transformed without change in voltage how that is going to become possible?

    ReplyDelete