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SYED ALEEMUDDIN04-09-4006
8/2/2019 Final Copy of Witricity ---Aleem
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Transmission of electrical energy or power fromone object to another object without the use of wires is called witricity.
Because of witricity some of the devices wontrequire batteries to operate.
WHAT IS WITRICITY
WITRICITY is nothing but WirelesselecTRICITY.
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In 1891,nikola tesala proposed a methodof wireless power transmission ,as it is inradiative mode ,most of the power was
wasted and has less effeciency. In 2005,Dave Gerding coined the term
WITRICITY which is being used today.
Forgotten invention was reborn in 2007 byMIT (massachussets institute of technology) researchers.
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Electricity
Magnetism
Energy couplingMagnetic induction
Resonance
Electromagnetism
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ELECTRICITYThe flow of electrons (current)through a conductor (like a wire )or charges through theatmosphere (like lightning).
MAGNETISMA fundamental force
of nature ,whichcauses certain typesof materials to attractor repel each other.
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Is the production of voltage (inducedcurrent)across a conductor movingthrough a magnetic field
For example,it turns out that anoscillating magnetic field produces an
electric field and an oscillatingelectric field produces an magneticfield.
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ELECTROMAGNETISM
A term for the interdependenceof time varying electric andmagnetic field .
ENERGY/POWER COUPLING
It occurs when an energy sourcehas a means of transferringenergy to another object.
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The Transfer of Electricity from one place to another withoutwires is known as “Witricity”.
There are witricity power sources(transmitter) and capturedevices(receiver).
Power source provides power to the devices where as capturedevice captured it to work.
Power source and capture devices are specially designed
magnetic resonators.
Magnetic resonators efficiently transfer power over largedistance via the magnetic near-field.
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Witricity’s Technology Technology Benefit
Highly resonant strong coupling High efficiency over distance
Energy transfer via magneticnear field
Can penetrate and wrap aroundobstacles
Non radiative energy transfer Safe for living beings and otherenvironmental objects
Flexible geometry Device that can fit into OEM(original equipmentmanufactures)products
Scalable design From mW to kW
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Consumer electronics
Industrial
Transportation…
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No need of line of sight.No need of powercables and batteries.Does not interfere
with radio waves.
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Production of 40 Billion DisposableBatteries / Yr can be reduced
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Wireless powertransmission can be
possible only in fewmeters.
Efficiency is onlyabout 40%.
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Wireless Power Transfer via Strongly Coupled MagneticResonances André Kurs,Aristeidis Karalis,Robert Moffatt,1J. D. Joannopoulos,Peter Fisher, Marin Soljacˇic´ .
Efficient wireless non-radiative mid-range energy transfer Aristeidis Karalis*, J.D. Joannopoulos, and MarinSoljačić Center for Materials Science and Engineering and Research Laboratory of Electronics Massachusetts Instituteof Technology, 77 Massachusetts Avenue, Cambridge, MA
02139, USA . http://www.witricty.com
http://www.witricity power.com
http://www.sciencemag.org/cgi/data
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GOOD BYE WIRES ….