This slide presentation summarizes wireless power transmission (WPT) technology. It defines WPT as transmitting power without wires by using microwaves. Some key components of a WPT system are described, including microwave generators, transmitting and receiving antennas, and rectennas. The history of WPT is traced back to experiments by Nikola Tesla in the late 1800s. Applications mentioned include powering electric vehicles and mobile phones wirelessly. While high efficiency is possible, challenges include high installation costs and potential interference with existing wireless systems.
This ppt explains how to develop a device for wireless power transfer. It can make a remarkable change in the field of the electrical engineering and eliminates conventional copper cables and current carrying wires.
What is wireless power transmission(WPT)?
Why is WPT?
History of WPT
Types of WPT
Techniques to transfer energy wirelessly
Advantages and disadvantages
Applications
Conclusion
References
This ppt explains how to develop a device for wireless power transfer. It can make a remarkable change in the field of the electrical engineering and eliminates conventional copper cables and current carrying wires.
What is wireless power transmission(WPT)?
Why is WPT?
History of WPT
Types of WPT
Techniques to transfer energy wirelessly
Advantages and disadvantages
Applications
Conclusion
References
One of the major issue in power system is the losses occurs during the transmission and distribution of electrical power. As the demand increases day by day, the power generation increases and the power loss is also increased. The major amount of power loss occurs during transmission and distribution. The percentage of loss of power during transmission and distribution is approximated as 26%. The main reason for power loss during transmission and distribution is the resistance of wires used for grid. The efficiency of power transmission can be improved to certain level by using high strength composite overhead conductors and underground cables that use high temperature super conductor. But, the transmission is still inefficient. According to the World Resources Institute (WRI), India’s electricity grid has the highest transmission and distribution losses in the world – a whopping 27%. Numbers published by various Indian government agencies put that number at 30%,40% and greater than 40%. This is attributed to technical losses (grid’s inefficiencies) and theft. Any problem can be solved by state of the art technology. The above discussed problem can be solvedby choose an alternative option for power transmission which could provide much higher efficiency, low transmission cost and avoid power theft. Microwave Power Transmission is one of the promising technologies and may be the righteous alternative for efficient power transmission.
Wireless power transfer (WPT), wireless power transmission, wireless energy transmission, or electromagnetic power transfer is the transmission of electrical energy without wires. Wireless power transmission technologies use time-varying electric, magnetic, or electromagnetic fields. Wireless transmission is useful to power electrical devices where interconnecting wires are inconvenient, hazardous, or are not possible.
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La electricidad inalámbrica es un tema que ha sorprendido a varias personas, por lo que ha sido estudiada y puesta a disposición para un futuro muy cercano.
One of the major issue in power system is the losses occurs during the transmission and distribution of electrical power. As the demand increases day by day, the power generation increases and the power loss is also increased. The major amount of power loss occurs during transmission and distribution. The percentage of loss of power during transmission and distribution is approximated as 26%. The main reason for power loss during transmission and distribution is the resistance of wires used for grid. The efficiency of power transmission can be improved to certain level by using high strength composite overhead conductors and underground cables that use high temperature super conductor. But, the transmission is still inefficient. According to the World Resources Institute (WRI), India’s electricity grid has the highest transmission and distribution losses in the world – a whopping 27%. Numbers published by various Indian government agencies put that number at 30%,40% and greater than 40%. This is attributed to technical losses (grid’s inefficiencies) and theft. Any problem can be solved by state of the art technology. The above discussed problem can be solvedby choose an alternative option for power transmission which could provide much higher efficiency, low transmission cost and avoid power theft. Microwave Power Transmission is one of the promising technologies and may be the righteous alternative for efficient power transmission.
Wireless power transfer (WPT), wireless power transmission, wireless energy transmission, or electromagnetic power transfer is the transmission of electrical energy without wires. Wireless power transmission technologies use time-varying electric, magnetic, or electromagnetic fields. Wireless transmission is useful to power electrical devices where interconnecting wires are inconvenient, hazardous, or are not possible.
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La electricidad inalámbrica es un tema que ha sorprendido a varias personas, por lo que ha sido estudiada y puesta a disposición para un futuro muy cercano.
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One of the major issue in power system is the losses occurs during the transmission and distribution of electrical power.
The percentage of loss of power during transmission and distribution is approximated as 26%.
The main reason for power loss during transmission and distribution is the resistance of wires used for grid.
Any problem can be solved by state–of-the-art technology.
Microwave Power Transmission is one of the promising technologies and may be the righteous alternative for efficient power transmission.
Wireless power transmission technology is not a new technology. In 1980, it was demonstrated by Nikola Telsa. ... The name wireless power transmission states the transfer of electrical power from a source to an electrical device without the help of wires. Basically, it involves two coils: a transmitter and a receiver coil.
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4. SLIDE PLAN
WPT -definition
Reason for WPT
History
Components of WPT
Efficiency
Applications
Advantages and Disadvantages
Conclusion
5. WHAT IS WPT?
Wireless power transmission is a concept of transmitting
power without using wires.
The power transmission is based on microwaves from one
place to another in order to reduce transmission and
distribution losses.
6. REASONS FOR WPT
Wireless transmission is useful in cases where
interconnecting wires are inconvenient, hazardous,
or impossible.
The losses occur during the
transmission and distribution of
electrical power.
The percentage of loss is 26%.
7. 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 Soljacic from MIT.
8. COMPONENTS OF WPT
Microwave Generator
• The microwave transmitting devices are classified as
Microwave Vacuum Tubes, Microwave Power Module
(MPM) and Semiconductor Microwave transmitters.
• Magnetron is widely used for experimentation of WPT.
• The highest efficiency over 90% is achieved at 2.45 GHz
among all the frequencies.
9. Transmitting Antenna
• The slotted wave guide antenna, microstrip patch
antenna, and parabolic dish antenna are the most
popular type of transmitting antenna.
• The slotted waveguide antenna is ideal for power
transmission because of its high aperture efficiency
(> 95%) and high power handling capability.
10. Rectenna
• It was first conceived by W.C. Brown in the early of
1960s.
• The rectenna is a passive element consists of
antenna, rectifying circuit with a low pass filter
11. Functional block diagram of WPT system
TRANSMITTING
ANTENNA
MICROWAVE
ON FREE SPACE
SCHOTTKY BARRIER DIODE RECEIVING
ANTENNA
Microwave
Power
Source
Coax-
Waveguide
Adaptor
Waveguide
Circulator
Tuner &
Directional
Coupler
Coax-
Waveguide
Adaptor
Impedance
Matching &
Filter Circuit
12. EFFICIENCY
The efficiency of wireless power is the ratio
between power that reaches the receiver and the
power supplied to the transmitter.
A rectenna may be used to convert the microwave
energy back into electricity.
Rectenna conversion efficiencies exceeding 95%
have been realized.
13. MERITS
Eliminates the high-tension power transmission line
cables, towers and sub stations
cost of transmission and distribution become less.
High efficiency.
No power failure and power theft.
Safer by eliminating the sparking hazard.
14. DEMERITS
The capital cost for practical implementation of WPT seems
to be very high.
Interference of microwave with present communication
systems.
15. Biological Impacts
Common beliefs fear the effect of microwave
radiation.
But the radiation level is less than radiation from
microwave oven and higher than cellular phone.
Thus public exposure to WPT fields would also be
below existing safety guidelines.
19. 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 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 possible at all.
20. REFERENCE
[1] http://cleantechindia.wordpress.com/2008/07/16/indiaselectricity-
transmission-and-distribution-losses/
[2] Nikola Tesla, My Inventions, Ben Johnston, Ed., Austin, Hart
Brothers, p. 91,1982.
[3] Nikola Tesla, “The Transmission of Electrical Energy Without
Wires as a Means for Furthering Peace,” Electrical World and
Engineer. Jan. 7, p. 21, 1905.
[4] The Electrician (London), 1904).
[5] W.C. Brown, J.R. Mims and N.I. Heenan, “An Experimental
Microwave-Powered Helicopter”, 965 IEEE International
Convention Record, Vol. 13, Part 5, pp.225-235.
[6] Brown., W. C. (September 1984). "The History of Power
Transmission by Radio Waves". Microwave Theory and Techniques, IEEE Transactions
on (Volume: 32, Issue: 9 On page(s): 1230- 1242 + ISSN: 0018-9480).
http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1132833.