supervisor: falah mahmmoud. brief history about wpt. * the first existence was in 1990 by nickola...
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![Page 1: Supervisor: Falah Mahmmoud. Brief History about WPT. * The first existence was in 1990 by Nickola Tesla. *Wireless power transmission with microwaves](https://reader036.vdocuments.us/reader036/viewer/2022062408/56649f285503460f94c405e2/html5/thumbnails/1.jpg)
Supervisor: Falah Mahmmoud
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Brief History about WPT.*The first existence was in 1990
by Nickola Tesla.*Wireless power transmission
with microwaves by Brown in 1960.
*Developing Rectenna which make it to succeed in MPT in1964.
*In 1980’s Japanese began their researches in this subject.
*In 1987 Canadian group succeeded fuel-free airplane flight experiment with MPT called SHARP.
*after 1995 Japanese and European developed many technologies
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Why Wireless Power Transmission??•It is much better than disposal batteries.•Simply, wires are noisy!•Convenience•Reduces clutter in workspaces, homes, etc.•Variety of Applications
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What about safety??• Non-radiative power transfer uses magnetic
near field.• Magnetic fields are safe for people and
animals.• Highly resonant coupling minimizes energy
transfer to “off – resonant” objects.• WiTricity systems are designed to meet int’l
safety guidelines.
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How Wi tricity technology work?? AC power is supplied at the system operating
frequency
The inductor and capacitor are chosen so that they resonate at the operating frequency, creating a much larger magnetic field
By placing a resonant receiver within the magnetic field, a resonant circuit is created
This resonant circuit allows the system to pass voltage and current to the receiver over significant separation distance
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Requirements of our project.Transmit power wirelessly at least 20 inches
Produce 5-V / 10W output to receivers
Transmission frequency should be greater than
2MHz
System must utilize Magnetic Induction
Primary side must plug into a wall outlet
Must charge a device
(Sub-project) Must have testing device
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Design ComponentsTransmission
Side
Power Source
Power Processing
Wireless Channel
Sending
Receiving
Receiving Side
Power Processing
Output Power
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Full System SchematicSource Side
8
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Transmission Side
DC- Source
10-24 v
Collpit Oscillator
Power Amplifier
Primary Coil
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Collpitts Oscillator*Directly connected to power source
* Creates output AC signal at designed frequency.
*.Extremely robust
* Directly connected to amplifier.
Collpitts ComponentsComponents Value Quantity
Variable Inductor 0.1 - 100 μH 1Capacitors 100pF 2Resistors 50 /2.2k/ 10k 4
http://www.biocrawler.com/w/images/f/f6/NPN_Colpitts_oscillator_collector_coil.png
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Power Amplifier.*Collpitts Oscillator provides small signal input
* Can provide at least 30W output for 5-10MHz frequency
* Directly Connected to single winding primary coil
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Oscillator circuit and class D power amplifier:
The output is pure sinusoidal signal:
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Another choice:High output power signal circuit:
-In the circuit shown here you can create high frequency electromagnetic waves with very high output power.
-The frequency Range from 200kHz to 10MHz was generated using this coil.
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This was the output of the previous circuit:
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Wireless Channel
Our attempts in building the coils:
Transmission Coil
Receiving Coil
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These were the certified coils:
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Receiving Side:
SecondaryCoil
Full-Wave Rectifier
Voltage Regulator
Charger (Optional)
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Full wave Rectifier: -Will be directly connected to single winding secondary coil.
-Rectifier must handle MHz frequency and up to 15W
http://upload.wikimedia.org/wikipedia/commons/c/cc/Gratz.rectifier.en.png
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Voltage Regulator:-Will connect directly to rectifier.
-Will provide 10W 5V dc output for charging device.
•Input Voltage: 3V to 30V• Output Voltage: 1.25 to 13V• Output Power: 10W• Output Amp: 1.5A (Not over 10W)
http://www.robotshop.us/dimension-engineering-de-swadj-1.html?
utm_source=google&utm_medium=base&utm_campaign=jos
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THANK YOU..Please feel free for any questions...