Wireless electricity is important

1. BY-
Anupam Panja (EE- R-01)
Aniruddhasen (EE-R-23)
ShiladityaMukhejee (EE-R-54[09])

2. Contents
What is wireless electricity
HOW WIRELESS POWER WORKS
Wireless electricity in lay person’s terms
How it will be used
Future use in business
Current uses
Benefits
Cost

3. 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.
—

4. HOWWIRELESSPOWERWORKS:-
 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.

5. InLayperson’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.

6. HowIt 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!

7. 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

8. 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

9. 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

10. LIMITATION
 The resonance condition should be satisfied and if
any error exists, there is no possibility of power
transfer.
 Any possibility of very strong ferromagnetic
material presence causes low power transfer due
to radiation.

11. 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.

12. CONCLUSION
 The optimal regime of efficient power transfer is Strongly
coupled regime.
 High κ/Γ ratio gives high power output. For no changes
in κ/Γ ratio, there is no change in power transfer.
 After designed the parameters with FEFD method and
simulating for the κ/Γ ratio changes with and without
the external objects, we can conclude that there is no
large variation in κ/Γ ratio.

13. THANKYOU