1) MIT physicists have invented a new technology called "Witricity" that enables the wireless transmission of electricity through resonant magnetic coupling, eliminating the need for wires. 2) Witricity works by using an oscillating magnetic field to induce resonant electric currents in a nearby receiving device, transmitting power efficiently over short distances. 3) This technology could make home and mobile electronics more convenient by powering devices wirelessly and has potential applications in powering phones, headphones, and other devices without needing batteries or charging cables.

1. WIRELESS ELECTRICITY
FUTURE OF ELECTRICITY!!!
1
SACHIN KHANDELWAL
S.K.I.T

2. THE BEGINNING…
2

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TESLA’S DESIGN

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We Humans Love Electricity

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WE LOVE ELECTRICITY
And to power our mobile devices we BUY…
40 BILLION disposable BATTRIES/yr…

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WHICH ENDS AS…

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AND WE USE..
WIRES..

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WHICH SOMETIMES ENDS US..

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NECESSITY
Is the Mother of
INVENTION

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MIT physicists invent WITRICITY!!

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MIT Experiment

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electricity
Electro
magnetism
magnetism
Magnetic
basics
induction
Resonant
magnetic
coupling
resonance
Energy
coupling

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Electricity is a general term that encompasses a
variety of phenomena resulting from the
presence and flow of electric charge.

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Magnetism is a force that acts at a distance due
to a magnetic field

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• It 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

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Transformer

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On basis of resonant energy transfer

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Electric Magnetic
feild feild

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•The magnetic field induces current in the capture coil, and a
magnetic field around it.
•The magnetic field of the two couple tightly and transfer
power efficiently

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Home Electronics APPLICATIONS

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Mobile Electronics Applications

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Future with wireless electricity
• More Convenient
• More reliable
• Environmental friendly

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What about Safety??
• Non- radiative power transfer.
• Magnetic Fields are safe for humans and
animals.
• Highly resonant coupling minimizes energy
transfer to “off resonant “ objects
• Witricity systems are designed to meet int’l
safety guidelines

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Disadvantages
•Wireless power transmission can be possible
only in few meters.
•Efficiency is only about 40%.

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MARKET DEMANDS
Market
Rapid growth in Mobile phones, portable
Mobile phone market music players, Bluetooth
headsets.
Technology Development
Rapid improvement in Electromagnetic induction
radio technology efficiency. method surpasses 60% the
threshold for regular use.
Competing Technology
Limit of battery technology; Limits to increases in capacity of
Development delay Li-ion batteries.

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