1. DR. B.C. ROY ENGINEERING COLLEGE, DURGAPUR
WIRELESS
POWER
TRANSMISSION
Submitted By-
AJEET KUMAR
MUKESH KUMAR
ADARSH GAURAV
MD SOHAIL AKHTER
MD SHAHID AKHTER
JAUHAR AHMAD SAYEED
HARISH CHANDRA MODAK
ELECTRICAL ENGINEERING DEPARTMENT

2. Slide Plan Why WPT History Principle Components Methods
BCREC/EE/ /5TH SEM/WPT
Slide Plan
Why WPT
History
Principle
Components
Methods
Merits and Demerits
Biological Impacts
Applications
Current Technology
Future Aspects
Challenges
Conclusion
Wireless Power Transmission

3. BCREC/EE/2013-14/5TH SEM/WPT
What is WPT?
The transmission of energy from one place to another without using wires
The wireless transmission is made possible by using various technologies
Wireless Power Transmission

4. BCREC/EE/2013-14/5TH SEM/WPT
Why WPT?
According to the World Resources Institute (WRI), India’s electricity grid has the highest transmission and distribution losses in the world – a whopping 27%.
This is attributed to technical losses and theft.
The continuity of power supply, optimizing the location of sensors, and dealing with rotating or moving joints.
Wireless Power Transmission

5. BCREC/EE/2013-14/5TH SEM/WPT
History
Experiments performed between 1888 and 1907 by Nikola Tesla
Started efforts on wireless transmission at 1891 in his “experimental station” at Colorado
He lighted a small incandescent lamp by means of a resonant circuit grounded on one end.
William C. Brown, the pioneer in wireless power transmission technology
The idea of Tesla is taken in to research after 100 years by a team led by Marin Soljačić from MIT
Wireless Power Transmission

6. BCREC/EE/2013-14/5TH SEM/WPT
Principle
Wireless Power Transmission

7. Components Microwave Generator Transmitting Antenna Rectenna
BCREC/EE/ /5TH SEM/WPT
Components
Microwave Generator
Transmitting Antenna
Rectenna
Wireless Power Transmission

8. Methods Induction Electromagnetic Transmission
BCREC/EE/ /5TH SEM/WPT
Methods
Induction
Electromagnetic Transmission
Evanescent Wave Coupling
Electrodynamic Induction
Electrostatic Induction
Wireless Power Transmission

9. BCREC/EE/2013-14/5TH SEM/WPT
Induction
The principle of mutual induction between two coils can be used for the transfer of electrical power without any physical contact in between.
The simplest example of how mutual induction works is the transformer, where there is no physical contact between the primary and the secondary coils.
Wireless Power Transmission

10. Electromagnetic Transmission
BCREC/EE/ /5TH SEM/WPT
Electromagnetic Transmission
Electromagnetic waves can also be used to transfer power without wires.
By converting electricity into light, such as a laser beam, then firing this beam at a receiving target, such as a solar cell on a small aircraft, power can be beamed to a single target. This is generally known as “power beaming”.
Wireless Power Transmission

11. Evanescent Wave Coupling
BCREC/EE/ /5TH SEM/WPT
Evanescent Wave Coupling
A process by which electromagnetic waves are transmitted from one medium to another by means of the evanescent (or decaying) electromagnetic fields.
This is usually accomplished by placing two or more waveguides close together so that the evanescent field does not decay much in the vicinity of the other waveguide.
Wireless Power Transmission

12. Electrodynamic Induction
BCREC/EE/ /5TH SEM/WPT
Electrodynamic Induction
Wireless Power Transmission

13. Electrostatic Induction
BCREC/EE/ /5TH SEM/WPT
Electrostatic Induction
Also known as “capacitive coupling”
It is an electric field Gradient or differential capacitance between two elevated Electrodes over a conducting ground plane for wireless energy Transmission
It involves high frequency alternating current Potential differences transmitted between two plates or nodes.
Wireless Power Transmission

14. BCREC/EE/2013-14/5TH SEM/WPT
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
Wireless Power Transmission

15. BCREC/EE/2013-14/5TH SEM/WPT
Demerits
The Capital Cost for practical implementation of WPT seems to be very high.
Interference of microwave with present communication systems.
Common belief fears the effect of microwave radiation.
Wireless Power Transmission

16. BCREC/EE/2013-14/5TH SEM/WPT
Biological Impacts
WHO recommends the human exposure guidelines determined by the Institute of Electrical and Electronic Engineers (IEEE) and by the International Commission on Non-Ionizing Radiation Protection (ICNIRP).
Public exposure to WPT fields would also be below existing safety guidelines.
Localized impact on the environment would be created if the operation of a WPT device has some effect.
Wireless Power Transmission

17. BCREC/EE/2013-14/5TH SEM/WPT
Applications
Generating power by placing satellites with giant solar arrays in Geosynchronous Earth Orbit.
Moving targets such as fuel free airplanes, electric vehicles, moving robots.
Ubiquitous Power Source (or) Wireless Power Source, Wireless sensors and RF Power Adaptive Rectifying Circuits (PARC).
Wireless Power Transmission

18. Current Technology Microwave Transmitter BCREC/EE/2013-14/5TH SEM/WPT
Wireless Power Transmission

19. Contd… Solar Power Satellites (SPS) BCREC/EE/2013-14/5TH SEM/WPT
Wireless Power Transmission

20. Contd… LASER transmission
BCREC/EE/ /5TH SEM/WPT
Contd…
LASER transmission
LASER converts electricity to light using lasers, and projects that light onto a specialized solar cell array, which then converts the light back into electricity.
The “wireless extension cord” delivers thousands of watts at ranges up to many kilometers.
The wireless transmission of power via laser is useful in situations where it is impractical or uneconomical to run wires, including unmanned aerial vehicles (UAVs), unmanned ground vehicles (UGVs), unattended sensors, communication towers, forward operating bases, and disaster relief.
Wireless Power Transmission

21. BCREC/EE/2013-14/5TH SEM/WPT
Future Aspects
It is one of the biggest challenges in today's world to transmit energy in rough terrain like mountains, forest, and sea.
A verified SPICE model of wireless transmission has been considered for the efficiency calculation along with the mathematical approach.
Numerical calculation shows that 30-70% transmission efficiency can be achieved by using this model of transmission depending upon the transmission distance and diameter of the antenna.
MATLAB simulator and Simulink have been used for the system response and adaptability.
Wireless Power Transmission

22. BCREC/EE/2013-14/5TH SEM/WPT
Challenges
Electromagnetic wave scatters freely in space as it propagates
The concerns that some environmentalists are placing is the depletion of ozone layer by the radiation.
There should be complete revolution in the electrical world for manufacturing and designing.
Some of the countries which depend on electrical energy for the economy like country Bhutan.
This was the main reason that Tesla failed to convince then the sponsors and entrepreneurs of his time to carry out his project.
Wireless Power Transmission

23. Conclusion
WPT emerges out as the best alternative for efficient power transmission despite its few drawbacks such as very high installation cost.
WPT has very high efficiency as the loss during power transmission is nearly negligible and it acts as a boon for the people of those areas where wired transmission is not possible
The power failure due to short circuit and electric faults would not be possible at all.
Wireless Power Transmission

24. BCREC/EE/2013-14/5TH SEM/WPT
THANK YOU!
Wireless Power Transmission