This document presents a project on wireless power transfer in 3D space. It discusses the methodology, hardware components including a high frequency transformer, electromagnetic coil, capacitor and lamp. The hardware is connected using a schematic diagram. Calculations are shown to determine the inductance using an online calculator and resonant frequency method. Tests were conducted to analyze the effect of distance, materials and angle on light intensity. It concludes wireless power transfer is now a reality and has applications in charging electric vehicles, smartphones and medical devices with advantages of simple design and low cost.

1. WIRELESS POWER TRANSFER IN 3D
SPACE

2. PRESENTED BY:
AISHWARYA KALBANDHE

3. CONTENTS
● Introduction
● Methodology
● Block Diagram
● Hardware Components
● Schematic Diagram
● Calculations
● Tests Conducted
● Advantages
● Disadvantages

4.  Limitations
 Applications
 Future Prospective
 Conclusion
 Reference

5. INTRODUCTION
● The main objective of this project is to develop a
system of wireless power transfer in 3D space.
● This project is an electronic circuit which is based on
low frequency to high frequency conversion.
● This project is formed out of an AC 230V 50Hz to AC
15KHz at 12V circuit.

6. METHODOLOGY
At present, energy has been transferred wirelessly
using such diverse physical mechanisms like:
● Laser
● Piezoelectric Principle
● Radiowaves and Microwaves
● Inductive Coupling
● "Strong" electromagnetic resonance

7. BLOCK DIAGRAM

8. HARDWARE COMPONENTS
● High Frequency Transformer
● Electromagnetic Coil
● Capacitor
● Lamp
● Power Cable

9. HARDWARE COMPONENTS
DESCRIPTION
1. Design of HF transformer

10. 2. Electromagnetic Coil
The inductance of multi-
layer, multi-row air-cored
cylindrical coils can be
calculated to a reasonable
degree of accuracy with
the simplified formula :
Inductance =

11. LITZ WIRE
● Litz wire is a type of cable used in electronics to carry
alternating current.
● It consists of many thin wire strands, individually insulated
and twisted or woven together, following one of several
carefully prescribed patterns often involving several levels
(groups of twisted wires are twisted together, etc.).

12. 3. Capacitor
● A capacitor or condenser is a passive electronic component
consisting of a pair of conductors separated by a dielectric.
● They are widely used in electronic circuits for blocking direct current
while allowing alternating current to pass; in filter networks for
smoothing the output of power supplies and in resonant circuits that
tune radio to particular frequencies etc.

13. Charge separation in a parallel-plate capacitor causes an internal electric
field.
A dielectric (orange) reduces field and increases the capacitance.

14. SCHEMATIC DIAGRAM

15. CALCULATIONS
The calculation of inductance is done using 2 methods.
 Using coil inductance calculator
 Method of resonating frequency

16. 1.Coil inductance calculator
The inductance of multi-layer, multi-row air-cored crylindrical
coils can be calculated upto a reasonable accuracy with the
following formulae, i.e. by online coil inductance calculation.
Inductance =
Where,
R- Coil radius in inches (distance of centre to the coil)
L-coil length in inches (distance from first to last winding)
D- Coil depth in inches
N- No. Of turns
Inductance = 1.473 mH

17. 2. Resonating Frequency
method
For the frequency transformer used,
f =
Where,
f- Resonating frequency
C- Capacitance of the capacitor used
L- Inductance of the coil
We have used, f ͌ 15kHz and C = 0.1 µF
Inductance (L) = 1.229mH

18. We get appreciably comparative values for both methods of
inductance calculation i.e. by the coil inductance calculator and
by the method of resonating frequency.

19. Why LC series and not LC parallel Inductive
Resonant Coupling?
Resonance occurs when the capacitive impedance of the circuit is equal
to inductive impedance.
Series resonance:
For a series resonance impedance is given by
|Ƶ|=√( +( - ) )
Where,
=inductive resistance
= capacitive resistance
 It acts as accepter circuit

20. Parallel resonance :
For a parallel resonance
|Y|=√ ( +( - ) )
Where,
G =Conductivity
=Capacitive suspectance
=Inductive suspectance
•It acts as rejecter circuit.

21. HARDWARE TESTING
● Continuity Test
● Power ON Test

22. TESTS CONDUCTED
Effect on variation of light intensity with respect to change in distance between
two coils.

23. 2 Effect of material placed between the two coils on the intensity of light .

24. 3 Effect of variation of angle between the two coils in intensity of light
(1)keeping the distance 1.6 cm

25. (2) keeping the distance 9 cm (distance where light intensity is highest)

26. (3) keeping the distance 30 cm (distance where light intensity is
minimum)

27. LIMITATIONS
Wireless power transfer is divided into 2 types:
Radiative (Near field)
Non-radiative (Far field)
In non- radiative, the field decreases with the cube of distance
Where,
– Distance between two antennas
– Diameter of the antenna
Power is proportional to the square of the field.

28. ADVANTAGES
● Simple design
● Lower frequency operation
● Low cost
● Practical for Short Distance

29. DISADVANTAGES
● High Power loss
● Non-Directional

30. APPLICATIONS
● Contactless Smart Cards
● Charging of electric vehicle
● Cell phone Battery charger
● Pacemaker

31. FUTURE PROSPECTIVE
● The electronic revolution of the past century has been a
tangled affair.
● Wireless is the future, which is all well and good for
information transfer. But what about energy itself?
● Power is the final cord that needs to be cut for complete
wireless freedom.

32. CONCLUSION
● The transmission of power without wires is not a theory or a
mere possibility, it is now a reality.
● Wireless transmission of electricity have tremendous merits
like high transmission integrity and Low Loss (80-90 %
efficient) and can be transmitted to any where around the
globe.
● It has a tremendous economic impact to human society. Many
countries will benefit from this service.

33. REFERENCE
● 'Wireless power transfer ' by C.Bhuvaneshwari ,
R.Rajeshwari in IJTEL (www.ijtel.org)
● Www.beyondlogic.org
● Www.thenextweb.com
● Www.wikipedia.org

34. THANK YOU!!