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Unit- 01
Date:15-02-2014.
Lesson Title : Transformer
Course ID:EEE-6763
Lesson No:01
Teacher : Md: Masud Rana

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 After finishing this class student will be
able to understand the transformer and
its working principle.
General Objective:

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At the end of this class students will be
able to:
Define the transformer
Classification of the transformer
Describe a practical transformer
Describe a transformer is constructed and
its work
Explain a step-up transformer work
Explain a step-down transformer work
Specific Objective

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Transformer is a static device which
transforms electrical energy from one
circuit to another circuit without any
direct electrical connection with the help
of Electromagnetic induction between
two windings.
Transformer

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Parts of transformer

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This transformer has two winding primary and
secondary. Primary winding connected with AC source
and secondary winding connected with load .
Working principle of
transformer

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When we connect AC source in primary side
circulating current create magnetic flux. This
flux goes through this secondary coil and
induced mutual voltage according to Faraday’s
electromagnetic induction laws . Then current
goes through the load . Hence electrical energy
transfer one circuit to another circuit with
electromagnetic induction .
Working principle of
transformer

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There are many kind of transformer such
as According to working principle:
1.Step up transformer
2.Step down transformer
According to phase:
1.Single phase transformer
2.Poly phase transformer
Classification of transformer

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1. Core type transformer
2. Shell type transformer
3. Spiral core type transformer
According to structure:

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Structure:
Step up and down transformer

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1. Transmission line
2. Distribution line
3. Television
4. Computer
5. Radio
6. Telephone set
7. Welding purpose
8. Air conditioner etc
Application of transformer

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Transformer is most important
device for transmission and
distribution and other sectors.
So we cannot think high and low
voltage transmission and
distribution without transformer.
Summary

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1. What is transformer ?
2. Where are transformer used ?
3. How many transformer according
to phage?
4. What is the working principle of
transformer?
Evaluation