This paper gives an introduction about Witricity technology. Witricity stands for wireless electricity. It uses the principle of mutual inductance for wireless power transfer. This is an interesting technology and has wide applications.

1. Wireless
Transmission of
Power
Presented by :Asim Sagheer
Anum Khan
Sumaira Sagheer
WiTricity

2. Contents
What
is WiTricity
Background
Working Principle
Is it secure ???
Applications
Limitations

3. What is WiTricity?
 Stands
for ‘wireless electricity’
 Eliminates the use of cables for
transmission of power
 Transmission by induction through
resonators.
 Security

4. (1/2)
Background
 In
1899, Sir Nikola
Tesla enlighten 200
lamps at the distance of
40 km.
 But only 15%
efficiency was
achieved.

5. (2/2)

MIT powered 60 watt
light bulb from 2 meters
(7 ft) at 40% efficiency
 First
practical example
of WiTricity.

6. (1/1)
Working Principle
 One
Simple Physics Rule !
 At Source : Electricity
Magnetic Wave
 At Device : Magnetic Wave
Electricity
 Resonant coupling

7. (1/1)
Is it secure ???
 Works
on the principle of magnetic
induction.
 Interact weakly with surrounding objects
(biological tissue)

8. (1/5)
Applications
 Automatic
electronics
wireless charging of mobile

9. (2/5)
 Direct
wireless powering of stationary devices
Sony demonstrated its
wirelessly powered
television
[2010 October]
Demonstration of WiTricity on cell
phone and LCD at the TED conference

10. (3/5)
 Direct
wireless powering of PC peripherals

11. (4/5)
 Automatic
wireless charging for electric vehicles

12. (5/5)
One source is able to transfer the energy for the
electronic devices.

13. Limitations
 It
is a midrange technology.
(max 7.5 m)
 The maximum efficiency obtained in full
ideal conditions is 95% .
 Only obstructions are metal structures like
metal doors and metal walls.

14. Bibliography :
 www.witricity.com
[18feb2012]
 www.witricitypower.com [18feb2012]
 www.tfcbooks.com [19feb2012]

15. Thank you !

16. Queries ???