What is WiTricity ?
Technique to transfer
How wireless power works
Is WiTricity secure ?
Range of WiTricity
Future of WiTricity
3. Normally, we picture
electric devices with wires.
For example, laptop, cell
phone, lamp etc.
Remember every time you
travel or at home, you need
to pack all the adapters
and chargers for your
devices. It’s unpractical,
isn’t it. The solution is near.
4. What is Wi-Tricity ?
Transmission of energy through the air.
Process of transferring electric energy or power over
distance without wires.
Wi-Tricity, a portmanteau for "wireless electricity", is a trademark
of WiTricity corporation referring to their devices and processes
which use a form of wireless energy transfer including resonant
energy transfer etc., the ability to provide electrical energy to
remote objects without wires using oscillating magnetic fields.
Nikola Tesla – The Genius
He did enlighten 200 lamps
at the distance of 40 km,
6. Prof. Soljacic – Another Genius
He did succeed to redesign
Tesla’s experiment in safer way.
7. Technique To Transfer
One Simple Physics Rule !
At Source : Electricity => Magnetic Wave
At Device : Magnetic Wave => Electricity
8. HOW WIRELESS POWER WORKS
1. Magnetic coil (Antenna A) is housed
in a box and can be set in wall or
2. Antenna A, powered by mains,
resonates at a specific frequency.
3. Electromagnetic waves transmitted
through the air.
4. Second magnetic coil (Antenna B)
fitted in laptop/TV etc resonates at
same frequency as first coil and
5. Energy charges the device.
10. FEATURES & BENEFITS
WITRICITY’S TECHNOLOGY TECHNOLOGY BENEFIT
Highly Resonant Strong Coupling High Efficiency over Distance
Energy Transfer via Magnetic Near Field Penetrates and Wraps-
Non-Radiative Energy Transfer Safe for People and
Scalable Design From Milliwatts to Kilowatts
Flexible Geometry Devices That Can Fit Into
Getting rid of great deal
of cables !
More secure, no risk of
Places where you can
not have physical cable,
12. WiTricity technology will make products:
No manual recharging or changing batteries.
Eliminate unsightly, unwieldy and costly power cords.
Never run out of battery power.
Reduce product failure rates by fixing the ‘weakest link’: flexing wiring
and mechanical interconnects.
More Environmentally Friendly:
Reduce use of disposable batteries.
Use efficient electric ‘grid power’ directly instead of inefficient battery
13. Is WiTricity Secure ?
Yes it is secure !
Principle of witricity is
based on oscillating
We too live in a globe
that is already
surrounded by magnetic
15. SAFETY CONCERNS
In the “far-field”, a transmitter would emit
mixture of magnetic and potentially
dangerous electric fields. But, crucially, at a
distance of less than one wavelength - the
"near field" - it is almost entirely magnetic.
Hence, Witricity uses low frequency
electromagnetic waves, whose waves are
about 30m (100ft) long.
16. Range Of WiTricity
WiTricity can perform electric transmission 2 cm to
Scientists are working on extending this range
Regarding efficiency –
With development done by MIT-IBM
efficiency raised to around %90 - %95
17. “Ridiculous technology”
Witricity is not the first jump on the concept of
Today, chip-giant Intel has seized on a similar idea
to Witricity's , whilst other companies work on
highly directional mechanisms of energy transfer,
such as lasers.
However, unlike Witricity's work, lasers require an
uninterrupted line of sight, and are therefore not
good for powering objects around the home.
"You go from the sublime to the ridiculous“.
19. Demo 1
One source is able to
transfer the energy
for the electronic
20. Demo 2
The main idea is that the two resonant object are at the same resonant frequency.
They tend to exchange energy efficiently without interrupting other object with
Aj. Roppon sings a song
same frequency as red
wine glass Different Frequency
21. So, the glass of the corresponding frequency to Aj. Roppon’s voice accumulate
sufficient energy to explode.
22. Demo 3
Sony demonstrated its Demonstration of WiTricity
wirelessly powered on cellphone and LCD at
television .[2010 the TED conference.
23. Demo 4
Batteries can be
charged , it is just
enough to place the
device to top of one
of these surfaces.
24. Demo 5
25. Future of WiTricity
Think that the city will be
covered with WiTricity hot
spots , just like Wireless
Internet, there will be no
need of charging batteries,
or carrying adapters all
If we apply this idea to the whole city, we might not have to use any
wired cable. Moreover, in the future, it would save the material cost, and
“WE CAN SAVE THE WORLD, YEAH!!!”