PPT on wireless Electricity

1. PRESENTED BY :
RAM KRISHNA PANDEY
1213321153
EN VI B

2. CONTENTS….
Need of Witricity
History of wireless power
Types of Wireless Energy Transfer
Applications of Witricity
What do you mean by WiTricity ?
Advantages & Disadvantages
Conclusion

3. What is Witricity ?
WiTricity technology is
transferring electric energy or
power over distance without
wires, with the basics of
electricity and magnetism.
The Transfer of Electricity from
one place to another without
wires is known as “WiTricity”.

4. Why do we need wireless
electricity???
The need of electricity in every nook and
corner of the world.
The demand of eco-friendly power.
Requirement of efficient and reliable
power.
To reduce dependence on wires and
batteries.
The ever increasing power demand.

7. In the year 1891,Nikola Tesla
proposed the method of
wireless transmission of
Electric Power
One of the greatest breakthroughs
of science at that time

8. It Began to Construction in 1901 in
New York and Shut Down by 1905,
Built the wardenclyffe tower which
could broadcast power wirelessly
using far-field techniques. Called off
as it radiated power into
surroundings raising issues of
power loss
Power theft
Health concerns

9. The Witricity Team
In 2007,6 MIT members headed
by Marin Soljacic were able to
successfully transmit power to a
bulb within a distance of 2m at
a freq of 9.9MHz using
concepts of non radiative mid
range energy transfer .
Resonance
inductive coupling
Efficiency at that point was just
approximately 43%

10. Types of wireless energy transfer
techniques are:-
Short range– Inductive
coupling
Mid range– Resonance
Inductive coupling
Long range-
Microwave Transmission

11. Uses electromagnetic induction
concept for the inter dependence
of time-varying electric and
magnetic fields.
Wireless electricity makes use of
the concept-
“Oscillating electric field
produces magnetic field and
oscillating magnetic field
produces electric field”.

12. Resonant Inductive
Coupling
Uses almost the same
concept as Inductive
coupling just that the coils
operate at resonant
frequency leading to
efficient transfer of energy
over a larger distance.

13. Microwave Transmission
Aims at higher power transfer over longer
distances practically in the range of some miles.
Requires a microwave source, antenna and
receiver.
operates in the frequency range of 1-40GHz.
operates at the highest efficiency at 2.45GHz.

14. Block diagram for witricity mechanism

15. WIRELESS ELECTRICITY IN OUR DAILY LIFE

16. Applications of Witricity (short range and mid range)
1.DIRECT WIRELESS POWER
No device would need wires
For TVs, toasters or any form of immobile
electronic devices.
2. AUTOMATIC WIRELESS CHARGING
Device with rechargeable batteries
charges itself.
3.INDUSTRIAL
would be free of heavy installation of
wires and devoid of any hazardous
electric shock incidents.
4.TRANSPORTATION
Could charge an electric car or automobile.

17. Advantages:
Disadvantages:
1. Efficient and reliable power.
2. Creation of a shock free environment.
3. Provides solution to the ever increasing demand for
power.
4. A more cost effective methodology for getting
electricity to your houses which includes paying less for
use of power.
1.For short and mid range transfer system has to be set at
the right frequency or there would be no power transfer.
2.For long range the installation cost is high while EMI is also
a concern.

18. Conclusion:
WiTricity, if successful will definitely change the way we live.
Imagine cell phones, laptops, digital camera's getting self
charged! Engineers have got job on hand to research and
commercialize the technology. Till then, it is a wait in
anticipation.

20. Queries will be appreciated !!