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Transformer

The document presents information on transformers, including their definition, why they are needed, working principle, construction, losses, types, and some interesting facts. Transformers are static devices that transform one level of AC electrical energy to another level without changing frequency through electromagnetic induction.

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Mahadi Hasan Patwary
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16 views15 pages

Transformer

The document presents information on transformers, including their definition, why they are needed, working principle, construction, losses, types, and some interesting facts. Transformers are static devices that transform one level of AC electrical energy to another level without changing frequency through electromagnetic induction.

Uploaded by

Mahadi Hasan Patwary
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Presentation on Transformer

2 Topics to be Discussed

1. What is Transformer.
2. Why does Transformer is needed.
3. Working Principle of Transformer.
4. Construction of Transformer.
5. Losses of Transformer.
6. Different Types of Transformer.
3 What is Transformer

Transformer is a static which transforms


one level of AC electrical energy to another
level of AC electrical Energy by
electromagnetic induction without changing
frequency.
4
Why Does Transformer is Needed

1. To reduce the conductor size


during transmission. P=VI.
2. Reduces transmission losses
3. To get desired voltage.
5 Working Principle of Transformer

1. The primary winding is connected to the


single phase ac supply, an ac current
starts flowing through it.
2. The ac primary current produces an
alternating flux in the core.
3. Most of the changing flux gets linked
with the secondary winding through the
core.
4. The varying flux will induce voltage into
the secondary winding according to the
faeaday’s laws of electromagnetic
induction.
6
Construction of Transformer
7
Different Types of Transformer
8
Different Types of Transformer

Step up and Step down Transformer


9
Different Types of Transformer
10
Different Types of Transformer

On the Basis of Cooling System


11
Different Types of Transformer

Instrument Transformer
12 Losses of Transformer

1. Copper loss- I2R loss in winding.


2. Core Loss- I2R loss in core.
3. Hysteresis loss- Due to magnetization
and demagnetization at each cycle.
4. Leakage loss- flux leakage in core.
13 Interesting Facts

Can the transformer operate on DC?


Answer: No.
● Because with a DC primary current, the flux produced in
the core is not alternating but it is of constant value.
● As there is no change in the flux linkage with the
secondary winding, the induced emf at secondary is
zero.
14

Thank You
15

Any Query?

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