Wireless Power Transfer has the ability to deliver major advancements in industries and applications that are dependent on physical, contacting connectors, which can be unreliable and prone to failure.

2. OVERVIEW
 INTRODUCTION
 WHY WPT(WIRELESS POWER TRANSMISSION) ?
 TECHNIQUES OF WPT
 APPLICATIONS OF WPT
 MERITS AND DEMERITS
 FUTURE SCOPE AND MARKET
 CONCLUSION

3. INTRODUCTION
 WHAT IS WITRICITY :The transmission of energy from
one place to another without using wires.
 In 1899, Sir Nikola Tesla Proposed a method of
Wireless Power Transmission
 The 187 feet tall tower to broadcast energy
 But due to Shortage of fund the tower did not operate

4. Tesla tower
Light up 400 bulbs

5. WHY WPT ?
Reliable
Efficient
Fast
Low maintenance cost
Can be used for short-range or long-range.

6. TYPES AND TECHNOLOGIES OF WPT
 Near-field techniques
Inductive Coupling
Resonant Inductive Coupling
Air Ionization
 Far-field techniques
Microwave Power Transmission (MPT)
LASER power transmission

7. 7
Short range – INDUCTIVE COUPLING, AIRIONIZATION
Medium range – RESONANT INDUCTIVE COUPLING
Long range power transfer - MICROWAVE POWER AND
LASER TRANSMISSION
For the application of

8. INDUCTIVE COUPLING
 Primary and secondary coils are not connected with
wires.
 Energy transfer is due to Mutual Induction
 Transformer is a basic example for induction process

9. Resonance Inductive Coupling(RIC
The capacitor and inductor forms the resonator. Charge
oscillates between inductor (as magnetic field) and
capacitor (as electric field.)
 This type of oscillation is called
resonance if the reactance's
of the inductor and capacitor
are equal.

10.  Capacitor is connected parallel to the coil
 Energy will be shifting back and forth between
magnetic field surrounding the coil and electric field
around the capacitor
 Block diagram

11. MICROWAVE POWER TRANSFER
In this method Electrical energy is converted to
microwave energy.
AC is converted to DC first then this DC is converted
to microwaves using MAGNETRON.
This wave is Captured using RECTENNA and convert
Microwave energy to electrical energy.
This Method is used where transfers high power from
one place to another being in line of sight usually.

12. Solar Power Satellite
Power beaming using microwaves has been
proposed for the transmission of energy from
orbiting solar power satellites to Earth

13.  RECTENNA in US receives 5000MW of power
from SPS
 Stands for rectifying
Antenna
 Converts microwave
to its DC equivalent
 MAGNETRON

14. LASERS
 In the case of electromagnetic radiation closer to
visible region of spectrum ,power can be
transmitted by converting electricity into a laser
beam that is then pointed at a solar cell receiver.

15.  LASER is highly directional, coherent
 Not dispersed for very long
 Simple receiver
 Photovoltaic cell
 Cost-efficient
 But, gets attenuated when it propagates through
atmosphere

16. Is WiTricity Secure ?
16
Principle is based on Magnetic Waves.
The question is if Magnetic Waves Secure ?
The answer is we all live in a globe that has already
surrounded by magnetic waves.
Yes it is secure !

17. APPLICATIONS OF WPT
 Near-field energy transfer
 Electric automobile charging
 Static and moving
 Consumer electronics
 Industrial purposes
 Harsh environment
 Far-field energy transfer
 Solar Power Satellites
 Energy to remote areas
 Can broadcast energy globally (in future)

18. DOMESTIC POWER APPLICATIONS

19. Wireless Parking Charger

20. Defense Systems
EEE NMIT 2014 20
Photographs showing several military applications for
highly resonant wireless
charging systems: military robots (left) and soldier
electronics (right).

21. MERITS
Eliminates the existing transmission line cables, towers and sub
stations
More freedom of choice of both receiver and transmitters
Cost of transmission and distribution become less.
Power could be transmitted to the places where the wired
transmission is not possible.
Loss of transmission is negligible level.
Safer by eliminating the sparking hazard.

22. DEMERITS
The Capital Cost for practical implementation of WPT
seems to be very high.
Interference of microwave with present
communication systems
Common belief fears about the effect of microwave
radiation among peoples
When LASERs are used,
conversion is inefficient
Absorption loss is high

23. FUTURE SCOPE AND MARKET
Think that the city will be covered with WiTricity hot spots
like wi-fi.
which eliminate need of charging batteries or carrying
adapters all around !
Transport system become wirelessly powered
which eliminate fuel engines.
 Which will give rise to the Robotic Technology
they will work for us 24 H 365 days without any failure.

24. CONCLUSION
More reliable than ground based solar power.
 If we develop this ,we need not bother about the
exhaustion of natural resources.
Transmission without wires- a reality
 Low maintenance cost. But, high initial cost
 Low energy wastage
 In near future, world will be completely wireless