witricity the wireless electricity

1. Revolution in the field of electRicity

2.  What do you mean by Wi Tricity ?
 Need of witricity
 History of wireless power
 Witricity Basics
 Working Principle
 Is Wi Tricity safe ?
 Application of WiTricity ?
 Advantages
 Limitations
 References
Contents

3. What is WitriCity?
Witricity is nothing but wireless electricity.
Transmission of electrical energy from one object
to another without the use of wires is called
Witricity.
Because of Witricity some of the devices won’t
require batteries to operate .

4. Why we need Witricity?.
WE USE WIRES…

5. And we use...

6. Which sometimes ends as…

7. 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.
 Able to light lamps over 25 miles away
without using wires
The team from Massachusetts
Institute of Technology, who call
their invention ‘WiTricity‘.
In the first successful trial of its
kind, the team was able to
illuminate a 60-watt light bulb 7ft
away.

8. BASICS OF WITRICITY

9. •Electricity is a general term
that encompasses a variety of
phenomena resulting from the
presence and flow of electric
charge.
•Magnetism is a force that acts
at a distance due to a magnetic
field. This field is caused by
moving electrically charged
particles or is inherent in
magnetic objects such as
magnet.

10. •Electromagnetic induction is the
production of voltage across a
conductor moving through a
magnetic field.
•Electromagnetism is one of the
four fundamental interactions of
nature, along with strong
interaction, weak interaction and
gravitation. It is the force that
causes the interaction between
electrically charged particles; the
areas in which this happens are
called electromagnetic fields
•Energy/Power Coupling: Energy
coupling occurs when an energy
source has a means of transferring
energy to another object

11. •Resonance :is the tendency of a
system to oscillate with larger
amplitude at some frequencies than
at others. These are known as the
system's resonant frequencies (or
resonance frequencies). At these
frequencies, even small periodic
driving forces can produce large
amplitude oscillations
•Resonant Magnetic Coupling:
Magnetic coupling occurs when two
objects exchange energy through their
varying or oscillating magnetic fields.
Resonant coupling occurs when the
natural frequencies of the two objects
are approximately the same.

12. 4) Electricity picked up by laptop's antenna, which must also be
resonating at 10MHz. Energy used to re-charge device.
5)Energy not transferred to laptop re-absorbed by source antenna.
People/other objects not affected as not resonating at 10MHz. 12
How WitriCity works ?
1) Power from mains to antenna, which is made of copper
2) Antenna resonates at a frequency of 10MHz, emitting
electromagnetic waves
3) 'Tails' of energy from antenna 'tunnel' up to 2.5m (8.2ft)

13. WiTricity’s technology is a non-
radiative mode of energy transfer,
relying instead on the magnetic
near field. Magnetic fields interact
very weakly with biological
organisms—people and animals—
and are scientifically regarded to
be safe. WiTricity products are
being designed to comply with
applicable safety standards and
regulations.

14. 14
Automatic wireless charging of mobile electronics
(phones, laptops, game controllers, etc.)in home,
car, office.
Direct wireless power and communication
interconnections at points of use in harsh
environments(drilling, mining, underwater, etc.)
Automatic wireless charging for existing
electric vehicle classes: golf carts, industrial
vehicles.
Witricity Applications :-

15. No need of line of
sight.
No need of power
cables and
batteries.
Does not interfere
with radio waves.
Wastage of power is small .
Negative health implications.
Highly efficient than
electromagnetic induction
Less costly.
ADVANTAGES

16. Limitations :-
Wireless power transmission can be possible
only in few metres.
Efficiency is only about 40%

17. REFERENCES :-
 www.wikipedia.com
 www.google.in
 An article published in the Science Magazine as “Wireless Electricity”
by Andre kurs.
THANKING YOU
ALL