Wi tricity

WITRICITY

Presented byAnanthalakshmi.C.GRoll No: 2 , S7CSE Department

Guided byRadhika G NairAssistant ProfessorCSE Department

witricity witricity witricitywitricity

CONTENTSIntroductionWiTricity ?History of WiTricityWiTricity MechanismAdvantages of WiTricityDisadvantages of WiTricityIs it Safe way ???Conclusion

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INTRODUCTIONMostly wires are using for power transmission

Wired Power Transmission makes more losses and

produce E-wastes.

WiTricity - To transfer electricity without wires

WiTricity can transfer electricity only to a limited

distance


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What is WiTricity ???Transmission of electrical energy from one object to

another without the use of wires is called as WiTricity

(Wireless Electricity)

Fastest , High Efficient & Faultless Electric power

transmission method

Two resonant objects of same resonant frequency tend to

exchange energy efficiently

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HISTORY

Nikola Telsa – Experimented in 1899

Enlighten 200 lamps at the distance of 40 km, Wirelessly !

Transfer 300kW power through 150kHz radio wave , But

failed.

Tesla Tower

RESEARCH AT ‘MIT’ Marine Soijacic and team from Massachusetts Institute of

Technology(MIT), who call their invention ‘WiTricity‘.

Experimented in 2007

60W light bulb from a power source 7 feet away without wires.


a b c

BASICS OF WITRICITY


WiTricity

Electronics

ResonanceEnergy

coupling

Magnetism

Electricity

Magnetism

Electromagnetism

Electromagnetic induction

Energy / Power Coupling

Resonance

Resonant Magnetic Coupling


FUNDAMENTALS


PHENOMENAS…

TYPES

Non radiative

Resonance Coupling

Inductive Coupling

Radiative Laser / Microwave

Near Field Transfer

Far Field Transfer

WiTricity Mechanism

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RESONANCE COUPLING

Resonance is the tendency of a system to oscillate with

greater amplitude at some frequencies.

Near field wireless transmission of electrical energy between

two coils that are tuned to resonate at the same frequency

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INDUCTIVE COUPLING

Primary coil and secondary coils are not connected

Energy transfer is through mutual induction

Change in current flow through one wire induces a

voltage across the ends of the other wire through

electromagnetic induction.


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LASER / MICROWAVE TRANSMISSION

Microwaves are widely used for point-to-point communications Laser waves used for far field power transfer without wiresHighly efficient technologyLine of sight is important factor


BASIC PRINCIPLETwo objects having same resonating frequency & Magnetic

resonance at Strongly coupled tend to exchange energy

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Figure1 Figure2 Figure3


Basic Design of WiTricity System

Power Supply

High Frequency Transformer

AC to DC filter Transistors LC Tank LC Tank Rectifier

and filter

DC Regulatio

nLoad

Wireless power transmission

Transmitter Receiver

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Block Diagram of the circuit

At Source: Electricity => Magnetic WaveAt Device: Magnetic Wave => Electricity

ExperimentThe experimental schema consist of two Self-resonant coils.

One coil (source coil) is coupled inductively to an oscillating circuit.

The other (device coil) is coupled inductively to a resistive load.

Self resonant coils rely on the interplay between distributed inductance

and distributed capacitance to achieve resonance.

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FEATURES & BENEFITSWitricity Technology Technology Benefit

Highly resonant strong coupling High efficiency over distance

Energy transfer via magnetic near field Can penetrate and wrap around obstacles

Non radiative energy transfer Safe for living beings and other environmental objects

Scalable design From milli watts to kilowatts

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


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Non - radiative

Weak magnetic field

Comply with applicable safety

standards and regulations.

IS WITRICITY TECHNOLOGY SAFE ?

Yes…

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BENEFITS OF WITRICITY

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1. More Convenient

2. More Reliable

3. More Eco Friendly

LIMITATIONS OF WITRICITY

1. The resonance condition should be satisfied and if any error exists, there is no possibility of power transfer.

2. If there is any possibility of Very Strong ferromagnetic material presence, then there may be a possibility of low power transfer due to radiation.

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APPLICATIONSAutomatic Wireless Power ChargingConsumer ElectronicsIndustrial

a

b

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APPLICATIONS

TransportationMedical ApplicationMilitary Application

a b

e

c d

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CONCLUSION

Electricity without wires are realityEfficient power transferGood bye to wiresResearches are going on Achieve within 20yearsSafe from electric shock

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REFERENCES

• http://www.witricity.com• MIT News 2007 Goodbye wires• http://www.WitricityPower.com• "Wireless electricity could power consumer,

industrial electronics". MIT News. • http://www.ijettjournal.org//Volume 11 Number

6 - May 2014



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THANK YOU

Wi tricity

Engineering

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