The End Of The Plug?
What is it?
 Based on electromagnetic induction (using conductive
materials in coils to create a magnetic field)
 Resonant Magnetic Coupling: when two objects exchange
energy through their varying or oscillating magnetic fields.
-Natural frequencies of the two objects are approximately
the same.
Source:
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http://en.wikipedia.org/wiki/Wireless_electricity
HOW WIRELESS POWER WORKS
 1. Magnetic coil (Antenna A) is housed in a box and can be set in wall or
ceiling.
 2. Antenna A, powered by mains, resonates at a specific frequency.
 3. Electromagnetic waves transmitted through the air.
 4. Second magnetic coil (Antenna B) fitted in laptop/TV etc resonates at same
frequency as first coil and absorbs energy.
 5. Energy charges the device.
Source: www.bbc.co.uk/2/hi/8165928.stm
In Layperson’s Terms
 Wireless electricity is the transfer of power to a
device over the air.
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It will allow devices to be powered or charged (with the
proper wireless attachments) without being plugged into
a wall outlet or docked in a charging station.
Source:
http://www.witricity.com/
How It Will Be Used
 Wireless electricity can be used to power or recharge:
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Cell Phones
TVs
Computers
Electric Cars
Cordless Tools
Industrial Machinery
Medical Devices (pacemakers, etc.)
Military Devices (unmanned robots, planes)
Consumer Appliances
ANYTHING ELECTRIC!
Source: http://www.witricity.com/pages/application.html
Future Uses In Business
 More Efficient Office Buildings/Factories
 Entire office buildings will run on wireless electricity
 Employees computers, cell phones, printers will all stay
charged throughout the business day
 Electric appliances will not have to be placed around
power outlets; running cords is no longer a hassle
Source: http://www.witricity.com/pages/application.html
Current Uses
 Wireless charging pads
 Electric Toothbrushes:
 Both of these techniques use small electric fields to
charge the devices.
 Haier America Digital Products group has already
developed a HDTV that transmits electricity and the
HD signal, making the TV completely wireless
Source: http://electronics.howstuffworks.com/wireless-power1.htm
http://www.physorg.com/news182608923.html
Benefits
 More Reliable/Less Costly
- Never run out of battery power in wireless zones
- Power transfers more efficiently than through wires
 More Convenient
- No more changing batteries
- No messy cords
 Environmentally Friendly
- Reduces the use of disposable batteries
- Reduces energy loss
Source: http://www.witricity.com/pages/application.html
Cost?
 Cost is still undetermined
 What they say is there are no exotic materials being
used that would make it overly expensive
 Prices should be comparable to products already out
Source: http://www.witricity.com/pages/application.html
Wireless Electricity
Here is an example of how this technology works:
http://www.ted.com/talks/eric_giler_demos_wireless_el
ectricity.html