it is very use full to us.

1. --The Wireless Electricity.

2.  introduction
 History of Wireless power.
 Need of Witricity.
 Basic Principle.
 Witricity technology
 Witricity applications
 Advantages and disadvantages
In this paper....In this paper....

3. INTRODUCTION
 Witricity is known as wireless electricity. Transmission of
electrical energy from one object to another without the use of
wires is called as WiTricity.
 The major source of conventional form of electricity is
through wires The continuous research and development has
brought forward a major breakthrough, which provides
electricity without the medium of wires.
 Today, as we can see the word ‘wireless’ is common in day –
to – day life. Wireless communication has made the world
smaller.

4. History of Wireless Power:
 In 1899, Sir Nikola Tesla
Proposed a method of Wireless
Power Transmission.
 As it is in Radiative mode, most
of the Power was wasted and has
less efficiency.
 The efficient midrange
power transfer concept is
Witricity. In this model source
and load are in Magnetic
resonance so there is no power

5. Need of Witricity:
Now a days there is a Rapid development of autonomous
electronics like Laptops, Cell-phones, House-hold robots and all
those devices typically rely on chemical energy storage(Battery)
As they are becoming daily needs to present generation, Wire
less energy transfer would be useful for many applications as
above and they need midrange energy.

6. Basic Principle:
The basic principle involved in Witricity concept is,
Two objects having same resonating frequency and in Magnetic
resonance at Strongly coupled regime tend to exchange energy ,
while dissipating relatively little energy to the extraneous off-
resonant objects.

7. WITRICITY TECHNOLOGY
The experimental design consisted of two copper coils, each a
self-resonant system. One of the coils,connected to an AC
power supply, was the resonant source. The other coil, the
resonant capture device,was connected to a 60 watt light bulb.
The power source and capture device were suspended in
midair with nylon thread, at distances that ranged from
a few centimeters to over 2.5 meters (8.2 ft).

9. APPLICATION
 Consumer Electronics

10. INDUSTRIAL
•Robots, packaging machinery,
assembly machinery, machine tools

12. Advantages:
☼ Unaffected by the day night cycle, weather or seasons.
☼ This is an eco friendly system..
☼ It is boon for the devices which uses midrange power.
Limitations:
☼ The resonance condition should be satisfied and if any error
exists, there is no possibility of power transfer.

13. Future scope
 MIT’S Witricity is only 40 to 45% efficient and they have to
be twice as efficient to compete with the tradiditonal chemical
batteries.
 The team’s next aim is to get a robotic vacuum or a laptop
working,charging devices placed anywhere in the room and
even robots on factory floors.
 In another three to five years time,they will come up with a
witricity system for commercial use.

14. WiTricity, if successful will definitely
change the way we live. Imagine
cellphones, 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.

15. References
 http://electron9.phys.utk.edu/optics507/modules/m6/couple
d_resonators.htm
•http://www.scribd.com/doc/22229219/Wireless-Electricity
•http://www.madeitsimple.com/technology/usher-into-a-new-era-
wireless-electricity-has-taken-off/
•http://docs.google.com/viewer?
a=v&q=cache:e5v5rsCQH7gJ:www.pcti.pctiltd.com/