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Wireless Electricity

PRESENTED BY: VIPUL PAWARTE IT (ii)

INTERNAL GUIDE:U.R.GODASE

WiTricity

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Introduction to WiTricity

History and Types of Energy Transfer

Principle of WiTricity

Working Of WiTricity

Features Of Technology

Applications

Advantages and Limitations

Future of the Technology

Conclusion and References

Contents

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Defn. of WiTricity-wireless electricity

Need of WiTricity-increasing demand of appl.

Concerns of recent Tech.-resistance

Goal of Technology-removal of grid

Movers and Inventors of Tech.

Whats WiTricity ?

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History of WET

Nikola Tesla(1899), Electromagnetic Induction

e.g. power transformers, motors etc.

Later, EM radiation in the form of radio waves

e.g. antenna pole and lamp direct EM radiation like LASERS but in vain.

In 2007,MIT team introduced WREL tech.

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3 major types of Wireless Energy Transfer

- Short range: Inductive Coupling

Medium range: Resonant Induction

Long range: Electromagnetic Wave PowerTransfer

Types of Energy Transfer

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Whats Inductive Coupling?

Range of Inductive Coupling

Use of the Inductive Coupling

Effect of I. Coupling

Applications

Inductive Coupling

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What Is Resonance and Resonant Induction?

Types of Resonant Induction

-acoustic, mechanical, electromagnetic etc.

Examples

-1.Swing 2.Shattering of Glasses

MIT Team conc. On Electromagnetic Coupled Resonators.

ResonantInduction

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Principles and workingWorks on the principle of Coupled Resonance Two copper coils radius 25 cm each

sender coil to power source, receiver coil to the

light bulb.

When turned on ,the sender coil emits electricity inthe form of a magnetic field, oscillating at a

specific frequency 9.9MHz The receiver coil picks up the transmission

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Actual Mechanism

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Two Self resonating coils

source coil coupledinductively to anoscillating circuit, sec. coilinductively to a resistive

load. interplay between

distributed inductancegives rise to resonance

Experimental realization

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Dream Product

Wireless technology will expand current

electronics market

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No effect of hindrance

100% assurance of charging

Non radiative-Doesnt affect on environment

Scalable design-can be designed to handle broad range

Minimum wastage of power

Million times efficient than Teslas one

Features of the Technology

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simplicity

safe, fairly efficient, good range

free from wire grid

weak interaction with human

omni-directional power

range from mill watts to kilowatts

Advantages

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flexible geometry-easily embedded

more environment friendlymore reliable

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Industrial and Transport

Transportation

Wirelesscommunication

across moving parts orjoints

In drilling,mining work

Replace costly wiring

and slip rings

Auto wireless charging ofmobile robots

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Other

Wireless charging for

ventricular devices,pacemaker etc.

In military, sensors,aircraft

Auto charging of smart

cards

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Aim to rise Efficiency More work in moving instruments e.g. moving robots. Four to five years to go for commercial use. Signed nondisclosure agreements to develop

products with more than 100 companiesmanufacturers of:

Cell phones, MP3 players, automotive parts,temperature sensors, hearing aids and medicalimplants

Wild Charge: a Colorado-based companyReleased a special back plate for the Motorola RAZR

Future of Technology

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This technology is a big impediment to development in the retail

sector right now. The wireless transfer of electricity has been a sci-fi dream up to

this point ,and truly, if electricity could simply be in the air, in the

same way radio waves and wi-fi signals are, it would change the

world.

Let's hope the researchers will be able to come up with thecommercial system soon. Till then, we wait in anticipation!

Conclusion

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1. An article published in the Science Magazine as Wireless Power Transfer via Strongly

Coupled Magnetic Resonances by Andre kurs, Science 317, 83(2007); Dol:10.1126/science.1143254.

2. H. Haus , Waves and Fields in Optoelectronics, Prentice hall Publishers, Englewood

3. http://electron9.phys.utk.edu/optics507/modules/m6/coupled_resonators.htm

4. Efficient Non-Radiative Midrange Energy Transfer by Aristeidies karalis, MarlinSoljacic's.

5. Nikola Tesla, My Inventions, Ben Johnston, Ed., Austin, HartBrothers, p. 91,1982.

6. Thomas F. Valone, Tesla s Wireless Energy... For the 21st Century!!! One StepBeyond Direct TV!!! Extra Ordinary Technology, 1, no. 4, Oct / Nov / Dec 2003.

7. James O. McSpadden, Wireless Power Transmission Demonstration, Texas A&MUniversity, June, 1997.

8. Charych Arthur (Setauket, NY), System and method for wireless electrical powertransmission, Patent No. 6,798,716, September 28, 2004.

9. Joe T. Howell, et. al , Advanced receiver / converter experiments for laser wirelesspower transmission5th. Wireless transmission conference, pp 1-8, Garanda,Spain,2004.

References

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