Witricity is the ability to transmit electrical power wirelessly through magnetic field coupling. The document discusses the history of wireless power transmission from Nikola Tesla's proposals in 1891 to recent successful experiments transmitting power over short ranges. It describes different types of witricity technologies based on range (short, medium, long), as well as current and potential applications like wireless phone charging and powering vehicles. Both advantages like eliminating wires and disadvantages including inefficiency and safety concerns are outlined.

1. BY: POORNIMA P
11GAEE5051
WITRICITY
A World without Wires

2. CONTENTS
 Introduction
 What is Witricity?
 Need of Witricity
 History of Wireless Electricity
 How it Works?
 Types Witricity
 Present Technology
 Applications
 Advantages And Disadvantages
 Conclusion
 References

3. INTRODUCTION
 The word Witricity is
derived from
combination of words
Wireless and Electricity
 In 1891, Sir Nikola
Tesla Proposed a method
of wireless power
transmission. But it was
in radiative mode, so
most of the power wasted
during the transmission.

4. WHAT IS WITRICITY?
 The term WiTricty is defined as the ability to
provide electrical energy to remote objects
without wires using oscillating magnetic fields.

5. NEED OF WITRICITY
 The ever increasing power demand.
 The demand of Eco-friendly power.
 Requirement of efficient and reliable power.
 To reduce dependence on wires and
batteries.
 To overcome problem of power loss during
transmission.

6. HISTORY
 In the year 1891,Nikola Tesla
proposed the method of
wireless transmission of
Electric Power.
 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

7. CONTINUATION…..
 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%

9. TYPES OF WITRICITY
 Short Range:
Inductive coupling
 Medium Range:
Resonance Inductive
coupling
 Long Range:
Microwave
Transmission

10. PRESENT TECHNOLOGY
 Wireless Charger.
 Haier Wireless TV.
 Automatic Car charging technology.
 Wireless power transfer based on Neural Network
Selector.
 Power generating solar Satellite Inhabitant.

11. APPLICATIONS
 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,for
any form of mobile devices .
 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.

12. ADVANTAGES & DISADVANTAGES
ADVANTAGES DIS -ADVANTAGES
 Efficient and reliable power.
 Creation of a shock free
environment.
 Provides solution to the ever
increasing demand for power.
 A solution to reduce e-waste- a
more safe environment.
 A more cost effective
methodology for getting
electricity to your houses which
includes paying less for use of
power.
 For short and mid range
transfer system has to be set at
the right frequency or there
would be no power transfer.
 For long range the installation
cost is high while EMI is also
a concern.

13. CONCLUSION
 The transmission of power without wires is not theory
or a mere possibility, it is now a reality.
 The electrical energy can be economically transmitted
without wires to any terrestrial distance.
 The system would reduce the cost of electrical energy
used by the consumer and get rid of the landscape of
wires, cables, and transmission towers.
 It has negligible demerits like reactive power which was
found insignificant and biologically compatible.

14. IMAGE OF A RECTENNA IN US WITH DIAMETER OF ABOUT HALF A MILE WHICH IS
IMPORTANT AS 95% OF THE MICROWAVE POWER IS RECEIVED BY RECTENNAS.US
RECEIVES ABOUT 5000MW OF POWER AS A RESULT.

15. WIRELESS ELECTRICITY IN OUR DAILY LIFE

16. REFERENCES
 An article published in the Science Magazine as “Wireless Power
Transfer via Strongly coupled magnetic fields ”
 “Efficient Non-Radiative Midrange Energy Transfer” by Aristeidies
karalis, Marlin Soljacic,2006.
 http://ieeexplore.ieee.org/Xplore/
 www.WiTricity.com
 www.WiTricitypower.com
 www.techjournal.com
 www.wikipedia.org
 http://www.sciencedirect.com/science/journals

17. Any Queries?
THANK YOU