International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072
© 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1457
Analysis and Design of Toroidal Transformer
Harshit Sawant
1
, Keyur Patel
2
, Rahi Tapare
3
, Prof. Darshit Patel
4
1, 2, 3
Students, Department of Electrical Engineering, Vadodara institute of engineering, Kotambi,
Vadodara-390018, Gujarat, India
4
Assistant professor, Department of Electrical Engineering, Vadodara institute of engineering, Kotambi,
Vadodara-390018, Gujarat, India
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Abstract – A Toroidal transformer provides increased
design flexibility, efficiency & compact design when compare
to traditional shell & core type transformers. The design of
most efficient toroidal transformer that can be built gives the
frequency, volt ampere ratings, magnetic flux density, window
fill factor and material which can use. With the above all
constant and only the dimension of the magnetic core is
varied. The most efficient design occurs when the copper losses
equal 60% of iron losses. When this criterion is followed
efficiency is higher. The model parameter calculated from the
design information. Therefore it is suitable to be included in
design loop of transformer design software. The results are
compared with the finite element simulations.
Key Words: Toroidal core, Toroidal Transformer
1. INTRODUCTION
This the purpose of this project is currently used in low
voltage low power applications, is to use a core made up of
continuous steel strip that is wound into a construction
allows for smaller more efficient, lighter and cooler with
reduced electromagnetic interferences lower acoustic noise.
The main technical advantage is that the no load losses
substantially reduced. It is possible to replace oil immersed
transformer with dry toroidal units, reduce the potential for
violent fault in addition to environmental benefits of
avoiding the use of oil.
1.1 Design Principle symbols:
V
1
= Primary voltage
V
2
= Secondary voltage
I
1
= Primary current
I
2
= Secondary current
P = Power
D
o
= Outer diameter
D
i
= Inner diameter
A = Cross sectional area of core
H = Height of core
T
p
= Number of Primary turns
T
s
= Number of secondary Turns
1.1.2 Consideration input assumptions for design of
toroidal transformer:
V
1
= 220, V
2
=120, P=1200, D
o
=18cm, D
i
=8cm, A=10cm,
H=8cm
1.1.3 Calculation of primary side:-
A
42
= T
p
×volt
Assumptions for design calculation:
Assumption based on our input based and a fixed power
value based we can directly finding on internet source and
use that values according to some reference.
18cm = D
o
8cm = D
i
10cm= A
8cm = H
Cross sectional area of core
10×8=80cm
Equivalent core area =
2
80
=
Numbers of turns:
Turns×volt =
A
42
T
p
=
40
42
= 1.05 v [no. of turns/volt]
So now,
Primary turns = Primary voltage/ Number of turns/volt
T
p
= 235/1.05
= 224 T
p
Assume 40cm cross sectional area of winding
Total wire = Cross sectional area × Numbers of turns in
primary side
40cm × 224 T
p
= 8960cm
= 89.60M
Wire use for primary winding
I =
1 V
P
I = =
2
40 m
2 V
P
A 10 . 5
235
1200
A 43 . 10
115
1200