witricity full report

[seminar class]

Submiited By
A.Murali Krishna

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Introduction
Wireless+Electricity=WiTricity.
 Transmission of Electrical energy from one object to another object without use of wires is called WiTricity.
 Witricity is based on strong coupling between electromagnetic resonant objects to transfer energy wirelessly between them.
Past &Present
 Nikola Tesla(1856-1943) has done the Wireless power transmission experiments at Wardenclyffe
 In 18 99 he transmitted power wirelessly.
 High frequency current, of a Tesla coil, could light lamps filled with gas (like neon)
 The MIT researchers successfully demonstrated the ability to power a 60 watt light bulb wirelessly,
(Distance of 7 feet) under the guidance of Marin Soljacic.
 Working of Electric Tooth Brush
 Electric tooth brush contains 1 coil and a battery.
 One coil is in the charger .
Splashpower Recharging Mat
 Example For Resonance
 Copper coil
 Wireless power transfer
MIT EXPERIMENT
 two 5-turn copper coils of 60 cm (24 in) diameter,
 Distance Between The Coils :7 Feet(2 M)
 Load :60watt Bulb.
 Efficiancy:45%
 Resonant frequency : 9.9 MHz
 Transfer of energy from Moon to Earth
 Solar power from the satellite is sent to Earth using a microwave transmitter
 Received at a “rectenna” located on Earth