advancements in wireless power (energy transfer)
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Advancements in
Wireless PowerHaleem Azmy
Bhuwan Ghimire
Andrew R McHugh
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Thank YouMITDr. Palmer and Dr. Stumpe
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What are we doing?
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Giler, Eric. "Eric Giler demos wireless electricity | Video on TED.com." TED: Ideas worth spreading. N.p., n.d. Web. 2 Dec. 2009..
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http://www.ted.com/talks/lang/eng/eric_giler_demos_wireless_electricity.htmlhttp://www.ted.com/talks/lang/eng/eric_giler_demos_wireless_electricity.html -
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What are we doing?
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Why is this Important?
More efficient thanbatteries1, and no more
batteries in landfills
No tangled wires
Automatic charging
Less gasoline
1. Giler, Eric. "Eric Giler demos wireless electricity | Video on TED.com." TED: Ideas worth spreading. N.p., n.d. Web. 2 Dec. 2009.
.
Tuesday, April 13, 2010
http://www.ted.com/talks/lang/eng/eric_giler_demos_wireless_electricity.htmlhttp://www.ted.com/talks/lang/eng/eric_giler_demos_wireless_electricity.htmlhttp://www.ted.com/talks/lang/eng/eric_giler_demos_wireless_electricity.html -
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When was wireless
power first discovered?
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When was wireless
power first discovered?
1800sTuesday, April 13, 2010
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Theory
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ResonanceInductance
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Resonance
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f0
f0
Resonance
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f0
f0
Resonance
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f0
f0
Resonance
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f0
f0
Resonance
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Faradays Law of
Induction (1800s)
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Resonancef0
f0
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S l C l d
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f0
f0
Strongly Coupled,Magnetically
Resonant Coils
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S l C l d
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f0
f0
Strongly Coupled,Magnetically
Resonant Coils
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S l C l d
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f0
f0
Strongly Coupled,Magnetically
Resonant Coils
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S l C l d
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f0
f0
Strongly Coupled,Magnetically
Resonant Coils
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S l C l d
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Strongly Coupled,Magnetically
Resonant Coils
f0
f0
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S l C l d
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Strongly Coupled,Magnetically
Resonant Coils
f0
f0
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Why Our Experiment
is Different Midrange power
transfer
Resonance is key
Safer than Teslacoils
Interference isessentially non-existent
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Our Experiment
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Equipment Needed
Two self resonating coils
(made out of magnetwire)
A source of alternatingcurrent
Oscilloscope
Laws of Physics
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Whats all this in
pseudo-simple language? Works on principle of Wireless Power Transfer Via
Strongly Coupled Magnetic Resonances
A.C. in the driving coil makes it oscillate at a certain
frequency creating an alternating magnetic field
This generated magnetic field will transfer power tothe receiving coil by oscillating at the same frequency.This is known as a coupled resonance and is the
principle behind this technique of wireless power.
A.C. will be induced in the receiving coil, which can beread by an oscilloscope.
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0
1.500
3.000
4.500
6.000
0 0.500 1.000 1.500 2.000 2.500 3.000 3.500
Distance vs. Induced RMS Voltage
InducedRMSV
oltage(V)
Distance (m)
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0
0.15000
0.30000
0.45000
0.60000
0.75000
0 0.500 1.000 1.500 2.000 2.500 3.000 3.500
Distance vs. Induced RMS Power
InducedRMSP
ower(W)
Distance (m)
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0
1.000
2.000
3.000
4.000
5.000
6.000
0 2.000 4.000 6.000 8.000 10.000 12.000 14.000 16.000 18.000 20.000
Frequency vs. Induced RMS Voltage
InducedRMSV
oltage(V)
Frequency (MHz)
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0
0.12500
0.25000
0.37500
0.50000
0 2.000 4.000 6.000 8.000 10.000 12.000 14.000 16.000 18.000 20.000
Frequency vs. Induced RMS Power
RMSInducedP
ower(W)
Frequency (MHz)
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F I d d RMS P LOG SCALE
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0.00001
0.00010
0.00100
0.01000
0.10000
0 2.000 4.000 6.000 8.000 10.000 12.000 14.000 16.000 18.000 20.000
Frequency vs. Induced RMS Power LOG SCALE
RMSInducedPower(W)
Frequency (MHz)
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RMS V l I d d RMS V l
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0
3.75
7.50
11.25
15.00
0 1.00 2.00 3.00 4.00
y = 2.9204x - 0.0387
R = 0.9999
RMS Voltage vs. Induced RMS Voltage
InducedRMSV
oltage(V)
RMS Voltage (V)
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RMS V l I d d RMS P
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0
0.500
1.000
1.500
2.000
0 1.00 2.00 3.00 4.00
y = 0.1448x2 - 0.0126x + 0.0045
R = 0.9999
RMS Voltage vs. Induced RMS Power
RMSInducedP
ower(W)
RMS Voltage (V)
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Future
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Problems
Hallway data
Reading errors
Manufacturing troubles
Over our heads
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Future Studies
Couple the coils differently
Multiple receiving coils
Accurately measuremagnetic field
Use a stronger functiongenerator
Change coil geometry
Try different interference
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