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SCOE, Information Technology 2010 1
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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