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TABLE OF CONTENTSINTRODUCTIONHISTORYBASICSWORKINGADVANTAGESDISADVANTAGESCONCLUSION

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WHAT IS WITRICITYElectricity without wires

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History of Wireless PowerIn 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.**WiTricity

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The forgotten invention is reborn in 2007 The idea of wireless electricity has been around since the early days of the Tesla coil. But thanks to a group of MIT scientists, team led by Marin Soljai and named it "WiTricity"**WiTricity

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There are 3 major types , each with different ranges, methods of transfer

Short range: Inductive Coupling

Medium range: Resonant Induction

Long range: Electromagnetic Wave Power Transfer**WiTricity

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HOW DOES RESONANT INDUCTION WORKSSame principles as magnetic induction, but uses resonance to increase the range.Everything resonates at a certain frequency, based on its shape and material.Energy transfers easily between resonating objects. With resonant induction, power is transmitted between two resonating coils.

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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.**WiTricity

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WORKING:

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WiTricity Technology: The Basics**WiTricity

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There are witricity power sources(transmitter) and capture devices(receiver).Power source provides power to the devices where as capture device captured it to work.Power source and capture devices are specially designed strongly-coupled resonators for midrange wireless non-radiative energy transfer

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Witricity Features Highly Resonant Strong Coupling Provides High Efficiency Over DistanceEnergy Transfer via Magnetic Near Field Can Penetrate and Wrap Around ObstaclesNon-Radiative Energy Transfer is Safe for People and AnimalsFlexible Geometry Allows WiTricity Devices to be Embedded Into Different Products

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It will make products :

More Convenient: -No manual recharging or changing batteries. -Eliminate unsightly, unwieldy and costly power cords.

More Reliable: -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 Charging.

Benefits of witricity**WiTricity

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ADVANTAGESSafe, fairly efficient, good rangeBoon for the devices which uses midrange powerNo need of line of sight.No need of power cables and batteries.Magnetic fields interact weakly with biological masses (humans), and energy is only transmitted between resonating objects**WiTricity

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DISADVANTAGESTransmissions possible only in few metersPossibility of energy theftEfficiency decreases with distanceThe resonance condition should be satisfied and if any error exists, there is no possibility of power transfer. **WiTricity

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WITRICITY CONCERNSWill it harm me?Will it harm the environment?Will it interfere with important communication?

NO**WiTricity

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APPLICATIONSDirect Wireless Powerwhen all the power a device needs is provided wirelessly, and no batteries are required. This mode is for a device that is always used within range of its WiTricity power source. Automatic Wireless Chargingwhen a device with rechargeable batteries charges itself while still in use or at rest, without requiring a power cord or battery replacement. This mode is for a mobile device that may be used both in and out of range of its WiTricity power source**WiTricity

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APPLICATIONSConsumer electronicsTransportationIndustry applicationsOther applicationsMedical devicesMilitary applicationsRobots

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REFERENCEShttp://en.wikipedia.org/wiki/WiTricityhttp://www.electricitybid.com/electricity/index.php/2007/06/08/witricity/http://www.witricity.com/

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THANKING YOU**WiTricity

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Features and benefitsWitricitys TechnologyTechnology Benefit**WiTricity

Highly resonant strong couplingHigh efficiency over distance

Energy transfer via magnetic near fieldCan penetrate and wrap around obstacles

Non radiative energy transferSafe for living beings and other environmental objects

Flexible geometryDevice that can fit into OEM (original equipment manufactures)products

Scalable designFrom Mw to kW

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Long Range Wireless Energy Transmission: Microwave Power Transfer

Microwave Power Transfer (MPT) is a form of wave power transfer that sends energy through air in the form of microwaves.MPT has a range miles longer than its inductive counterparts, and its being investigated as a way to beam power to space.

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APPLICATIONSRecently a Canadian program sent up SHARP (Stationary High Altitude Relay Platform), a small unmanned aircraft powered completely by energy beamed to it from the ground through microwaves.

Solar Power Satellites (SPS) could also be an application for MPT. Beaming solar energy collected from satellites or solar panels on the moon to Earth could be a solution to our clean energy issues.

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Currently, wired electricity powers nearly everything. It travels through wires in the form of Alternating Current electricity, and powers most of our devices.Wireless trasmission of energy will remove our dependency on wires*Tesla coil*MIT powered 60 watt light bulb from 2 meters (7 ft) at 40% efficiency

*Splashpower Ltd. is a United Kingdom-based company founded in June 2001*electromagnetic waves are harmless as long as theyre transferred at the right frequency.**Need more light in your office, no need for electrician. Simply place the lamp where ever you need it.

*will this possibly cause Luekemia or some kind of cancer. That fear is always raised about those living near large power transformers and lines. The fear has never been scientifically justified as being true but if this wireless power were in every room in every house in the United States it would be a matter of time before we would possibly know because the numbers of Leukemia patients would probably drastically go up*in the macroscopic world, this scheme could potentiallybe used to deliver power to robots and/or computers in a factory room, or electricbuses on a highway (source-cavity would in this case be a pipe running above the highway).In the microscopic world, where much smaller wavelengths would be used and smallerpowers are needed, one could use it to implement optical inter-connects for CMOSelectronics, or to transfer energy to autonomous nano-objects (e.g. MEMS or nanorobots)without worrying much about the relative alignment between the sources andthe devices.*