Transferring Electrical Potential Via Resonating Coil System

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Transferring Electrical Potential ViaResonating
Coil System

• Payden Waldo
• Chanho Park

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Intro

• Goals Build a wireless system, then quantify and
  
• increase its efficiency.
• Introduce a ferromagnet to the system in order to
  
• increase the efficiency.
• Question Is it possible to substantially
  increase the
• efficiency of a wireless system using such
  materials as
• ferromagnetism.

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System Overview
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Magnetic Fields

• A magnetic field is a field that permeates space.
• Magnetic fields carry an
• electrical charge.
• Magnetic Fields are produced by the motion of
  electric
• charges.
• Our system operates by the
• creation and utilization of this
• magnetic force.

http//en.wikipedia.org/wiki/ImageMagnet0873.png
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Ferromagnets and Paramagnets

• A paramagnet is a
• material that aligns its
• dipoles when influenced by an magnetic field.
• This alignment increases the moment of the field.
• This increase causes an expansion of the
• magnetic field.

http//en.wikipedia.org/wiki/ImageSteel_scrap.jpg
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Inductive Coupling

• Inductive coupling is the
• transfer of energy
• between 2 components
• through a shared
• magnetic field.
• Inductive coupling is the process our system goes
  through when transferring electrical potential.

http//en.wikipedia.org/wiki/ImagePoleMountTransf
ormer02.jpg
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Resonance

• Resonance is the process in which large
• quantities of vibrations are caused by a
• small driving force.
• When the source coil and conducting coil
• resonate at the same frequency power
• can be arced between the two elements.

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MIT Source Experiment

• In 2007 Marin Soljacic and his team at MIT
  successfully
• arced energy over a span of 3 meters.
• Using two objects that
• resonated at the same
• frequency he was able to send electrical
  potential at a
• frequency of 10 mega-hertz.
• The researchers were able to power a 60 watt bulb
  from 2
• meters away, at 40
• efficiency.

http//www.mit.edu/soljacic/
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Improvements to MIT

• We hope to, with the implementation of a
  paramagnetic, increase the efficiency of
• the MIT system.
• To test this we will use several different
• compositions of the system with the
• paramagnets to find the best orientation.

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Necessity

• Costs 530,000 to run
• electric one mile above
• ground.
• Health concerns about
• electrical wires.
• Power cords are an
• impedance and easily get in the way.
• Everything else is going wireless, why not
• electricity.

http//www.flickr.com/photos/chelseagirlphotos/251
664372/
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Methods

• A single copper loop (A))
• 12 guage(2.05mm thick)
• 25 cm radius
• Connect to coaxial cable

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• Source coil(B) and device coil(D)
• 2,60cm boards bind
• together (cross)
• 30cm radius
• 12 gauge -5.25 times
• Same gap
• 7x7cm opening throw
• the middle

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• A loop of wire (B)
• 12 gauge -10cm radius
• Attach to Device coil
• Connect the light bulb
• Voltmeter (light bulb)

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Position

• Order of coils
• A-S-D-B
• Wooden frame
• (2.50mX 1m )
• Hang A,S,D and B (string)
• A and S
• does not move
• D and B move
• together

D
B
S
A
15
10cm
22cm
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Experiment 1

• Without iron core on the middle
• Start from 50cm gap between S and D
• Increase the distance between S and D
• Measure Current, voltage, power
• Frequency

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Experiment 2

• Iron placed in a single copper loop and a source
  coil
• Iron placed in a Source coil
• One Iron placed in A and D and the other placed
  in D and B
• -Increase the distance between S and D
• -Measure Current, voltage, power
• Frequency

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Data
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Conclusions

• In conclusion Wireless Electricity still has a
  ways to go
• before it can be considered a viable system.
• STILL NOT CONCLUDED, WAIT FOR MORE INFO
• However, we can only conclude that, while there
  is no
• certainty, there is always opportunity.

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Future

• In the future we may try this experiment
• with
• different sized coils.
• Different cores.
• Higher frequencies.
• A real life situation (Laptop, I-Pod, etc.)
• Longer distance.

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Acknowledgments

• Dr. Hacklmen
• Mr. Kirsch
• Dr. Park
• Mr. Waldo
• CVHS Science Department