-: Transformer :-
Transformer is a static device that transfer electrical energy of one circuit to another circuit without change in frequency through electromagnetic induction .
Or
A statical device which used to transfer electrical energy between two or more circuits through electromagnetic induction is known as transformer .
-: Types of Transformer :-
Mainly transformers are classified on the following two basis-
1- On the Basis of core
2- On the basis of application
1- On the Basis of Core :- On the basis of the core , transformers are of following two types -
(i)- Core Type Transformer
(ii)- Shell Type Transformer
(i)- Core Type Transformer :- The core type transformers have a rectangular core with windings wound around the limbs of the core . Both the limbs of the frame , contain half primary and half secondary windings so that the leakage reactance is reduced . Also , low voltage windings are placed inside high voltage windings to reduce the insulation requirements of high voltage windings .
(ii)- Shell type Transformer :- In shell type transformer high voltage winding are sandwiched between two low voltage windings .
2- On the basis of Application :- On the basis of application of transformer , transformers are of following two types -
(i)- Step-up Transformer
(ii)- Step-down Transformer
(i)- Step-Up Transformers :- The transformers which are use to raise the input voltage to a higher voltage level is known as step-up transformers .
In other words , In that transformers primary voltage is less than secondary voltage is called step-up transformer .
(ii)- Step-Down Transformers :- Which transformers are used to reduce the input voltage to a lower voltage level is called step-down transformer .
In other words , In that transformers , primary voltage is greater than secondary voltage is called step-down transformers .
Basic Construction of Transformer :- Basically a transformer consists of two inductive windings and a laminated steel core . The coils are insulated from each other as well as from the steel core . A transformer may also consists of a container for winding and core assembly ( called as Tank ) .
In all type of transformers core is constructed by assembling or stacking laminated sheets of steel , with minimum air gap between them . Laminated sheets of steel are used to reduce eddy current loss. The sheets are cut in shape E , I and L .
Working Principle of Transformer :- The working of transformer is depends upon Faraday's law of electromagnetic induction . According to this law - " Rate of change of flux linkage with respect to time is directly proportional to the induced EMF ( Electromagnetic Force ) in a coil ". Actually , mutual induction between two or more winding is responsible for transformation action in an electrical transformation .
When a primary winding which is supplied by an alternating electrical source . Then alternating current through the winding produces the continually changing flux surrounds the winding . As this flux is continually changing in its amplitude and direction , there must be a change in flux linkage in the second winding or coil . Then according to Faraday's Law of Induction , there must be an EMF induced in the second coil . If the circuit of the later winding is closed , there must be an current flowing through it .
Transformer Efficiency :- The ratio of output power to input power is called transformer efficiency . It is denoted by 𝛈.
𝛈= Output / Input
Also Read ,
Power Losses in Transformer , Minimization of Losses of transformer
Core Type and Sell Type Transformer , Advantages , Disadvantages and Application of Core and Shell type Transformer
Transformer is a static device that transfer electrical energy of one circuit to another circuit without change in frequency through electromagnetic induction .
Or
A statical device which used to transfer electrical energy between two or more circuits through electromagnetic induction is known as transformer .
 |
| Image Source : Google |
-: Types of Transformer :-
Mainly transformers are classified on the following two basis-
1- On the Basis of core
2- On the basis of application
1- On the Basis of Core :- On the basis of the core , transformers are of following two types -
(i)- Core Type Transformer
(ii)- Shell Type Transformer
(i)- Core Type Transformer :- The core type transformers have a rectangular core with windings wound around the limbs of the core . Both the limbs of the frame , contain half primary and half secondary windings so that the leakage reactance is reduced . Also , low voltage windings are placed inside high voltage windings to reduce the insulation requirements of high voltage windings .
 |
| Image source : Google |
2- On the basis of Application :- On the basis of application of transformer , transformers are of following two types -
(i)- Step-up Transformer
(ii)- Step-down Transformer
(i)- Step-Up Transformers :- The transformers which are use to raise the input voltage to a higher voltage level is known as step-up transformers .
In other words , In that transformers primary voltage is less than secondary voltage is called step-up transformer .
(ii)- Step-Down Transformers :- Which transformers are used to reduce the input voltage to a lower voltage level is called step-down transformer .
In other words , In that transformers , primary voltage is greater than secondary voltage is called step-down transformers .
Basic Construction of Transformer :- Basically a transformer consists of two inductive windings and a laminated steel core . The coils are insulated from each other as well as from the steel core . A transformer may also consists of a container for winding and core assembly ( called as Tank ) .
In all type of transformers core is constructed by assembling or stacking laminated sheets of steel , with minimum air gap between them . Laminated sheets of steel are used to reduce eddy current loss. The sheets are cut in shape E , I and L .
 |
| Image Source : Google |
When a primary winding which is supplied by an alternating electrical source . Then alternating current through the winding produces the continually changing flux surrounds the winding . As this flux is continually changing in its amplitude and direction , there must be a change in flux linkage in the second winding or coil . Then according to Faraday's Law of Induction , there must be an EMF induced in the second coil . If the circuit of the later winding is closed , there must be an current flowing through it .
Transformer Efficiency :- The ratio of output power to input power is called transformer efficiency . It is denoted by 𝛈.
𝛈= Output / Input
Also Read ,
Power Losses in Transformer , Minimization of Losses of transformer
Core Type and Sell Type Transformer , Advantages , Disadvantages and Application of Core and Shell type Transformer
No comments:
Post a Comment