Introduction to Transformer
The Transformer is the widely used device in electric technology which allows transforming the voltage level as need.
it can be lower and higher than the input voltage.
The Transformer is a static electric machine which converts high voltage into the low voltage or low voltage into high voltage without changing frequency in various Power ratings.
Types of Transformers
- Step Up And Step Down Transformers
- Auto Transformer
- Polyphase Transformers
- Power Transformers
- Instrument Transformers
- RF/IF Transformers
- Audio Frequency Transformers
- Pulse Transformers
There are only two main things which we can do with the transformer
- To Step up the voltage
- To Step down the voltage
Step up Transformers
in such a condition where the output voltage is more than the input voltage.there is Step-up Transformers are used.
It is mainly used in electricity transmission line to reduce transmission current.
Step down Transformers
in such a condition where the output voltage is less than the input voltage.there is Step-down Transformers are used.
Ex., it is mainly used in household applications like electronic circuits where circuits are run at low voltage.
Transformers step down voltage in household applications from 220v to required voltage like 5,6,9,12,18,24,48 volts
Auto Transformer is used to buck and boost the voltage.
it has the primary winding connected in series with the secondary winding.
Polyphase Transformers works on more than 3 phase.
Ex. 4 phase Transformers, 6 phase Transformers, 8 phase Transformers. etc.
this is Transformers which has high power rating is called as the power transformer.
Ex. 400 MVA, 220 MVA, 1000KVA, etc.
The Principal of Transformer
transformer mainly works on mutual induction on the law stated by a well-known scientist Michael Faraday.
When the power supply is given to primary coil of the transformer magnetic field produces around the primary coil.
Flux produced by magnetic field cuts by secondary coil and then EMF(Electro Motive Force) produces in the secondary coil.
EMF produced in the secondary coil depends upon the number of turns.
Flux produced in the primary coil flows through iron core. The power rating of transformer depends upon the cross-sectional area of the iron core.
Note:- input frequency of power supply and output frequency in the transformer are equal this is the main advantage of the transformer.
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reference is taken from:-
- mahesh bhalekar
- from internet