it gives a description about of wireless power transmision.

1. By
Vatam.vinay.kumar
16399-EE-017
EEE-Department
Sphoorthy engineering college.

2. 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:
http://en.wikipedia.org/wiki/Wireless_electricity

3. 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

4. In Layperson’s Terms
Wireless electricity is the transfer of power to a
device over the air.
— 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/

5. How It Will Be Used
Wireless electricity can be used to power or recharge:
 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

6. 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

7. 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

8. 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

9. 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

10. Wireless Electricity
Here is an example of how this technology works:
http://www.ted.com/talks/eric_giler_demos_wireless_e
lectricity.html