1. The document discusses a case study on simulating a step-up transformer in MATLAB. 2. A step-up transformer increases voltage by having more turns in the secondary coil than the primary coil, inducing a higher voltage on the secondary side. 3. The case study involves simulating a step-up transformer in MATLAB, obtaining the simulation results, and analyzing the technical specifications and applications of step-up transformers.

1. Raghu Engineering College (Autonomous)
Accredited by NBA & NAAC with ‘A Grade, Permanently Affiliated JNTU Kakinada
Dakamarri (v), Bheemunipatnam Mandal, Visakhapatnam, Andhra Pradesh
531162
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2. Case Study
On
MATLAB STEP-UP TRANSFORMER SIMULATION
Submitted as a part of Second Year First Semester curriculum of
BACHELOR OF TECHNOLOGY
IN
ELECTRICAL AND ELECTRONICS ENGINEERING
By
Mr.P.ESWAR 18981A0237
Mr.K.MOHAN 18981A0238
MS. K.SUPRIYA18981A0239
Mr.M.NITISH KUMAR18981A0240
Mr. P.SANJAYKUMAR18981A0241
Under the Supervision of
Mr.Kranthi Kumar.S
M.Tech LMISTE
Associate Professor
Department of Electrical & Electronics Engineering
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3. An A.C. device used to change high voltage low
current A.C. into low voltage high current A.C. and
vice-versa without changing the frequency
In brief,
1. Transfers electric power from one circuit to another
2. It does so without a change of frequency
3. It accomplishes this by electromagnetic induction
4. Where the two electric circuits are in mutual
inductive influence of each other.
Transformer
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4. Principle of operation
It is based on
principle of MUTUAL
INDUCTION.
According to which
an e.m.f. is induced
in a coil when
current in the
neighbouring coil
changes.
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5. Cut view of transformer
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6. 1. When current in the primary coil
changes being alternating in
nature, a changing magnetic field
is produced
2. This changing magnetic field gets
associated with the secondary
through the soft iron core
3. Hence magnetic flux linked with
the secondary coil changes.
4. Which induces e.m.f. in the
secondary.
Working of a transformer
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8. STEP UP TRANSFORMER
• In Step Up Transformer, there are more turns
on the secondary coil than the primary coil.
• The induced voltage across the secondary coil
is greater than the applied voltage across the
primary coil.
• The voltage has been “stepped-up”.
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10. MAT LAB SIMULATION….
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11. SIMULATION RESULT …..
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12. MAT LAB SIMULATION :-
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13. TECHINICAL SPECIFICATIONS ……
 Frequency: 50
 Input Voltage: 220 V / 415 V
 Phase In: SINGLE PHASE
 Phase Out: 1 Ph
Rating: 5kva – Onwards
 Voltage In: 220 V / 415v
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14. Phasor diagram: Transformer on No-
load
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15. Transformer on load
Fig. a: Ideal transformer on load
Fig. b: Main flux and leakage
flux in a transformer
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16.  Starting the electrical motor,
 In the microwave oven,
 X-rays machines,
 In transmission lines
 Transformers with several secondar’s are used in
televisions and radio receivers
APPLICATIONS OF STEP UP
TRANSFORMER :-
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Conclusion :-
 The output voltage of the transformer across the secondary coil
depends upon the ratio(Ns/Np)with respect to the input voltage.
 There is a loss of power between input and output coil of a
transformer.

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•[1] Ilie F., Bulucea C.A., Popescu M.C.,
Simulations of Oil-filled Transformer Loss-
of-Life Models, Proceedings of the 11th
International Conference on Mathematical
Methods and Computational Techniques in
Electrical Engineering,
•Electrical Machines notes
Reference

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