This document summarizes wireless power transmission (WPT), including its history, types, and applications. It discusses how WPT works by transferring energy wirelessly using techniques like inductive coupling, resonant inductive coupling, and microwave or laser power transmission. Near-field techniques like inductive coupling have distance constraints but no radiation, while far-field techniques can transfer power over longer distances but require line-of-sight transmission. WPT could enable more efficient energy delivery and the elimination of wires and batteries in many devices.
The wireless power transmission is a great technology that has long history. It has more potential in the near future in various industrial as well as commercial applications.
Long conductors of electricity forming part of an electric circuit and electrically connecting said ionized beam to an electric circuit These methods achieve longer ranges, often multiple kilometer ranges, where the distance is much greater than the diameter of the devices to overcome these drawbacks the technology that offers to free applications from power cords and wall warts will confer a definite salable edge on electronic devices. Applications that would benefit from wireless power range from portable consumer electronics, such as cell phones and MP3 players, which could jettison their wall warts and power adapters, to low-power wireless-sensor networks, which could be free of frequent battery replacement, to medical implants in patients who could avoid surgery to replace batteries
The wireless power transmission is a great technology that has long history. It has more potential in the near future in various industrial as well as commercial applications.
Long conductors of electricity forming part of an electric circuit and electrically connecting said ionized beam to an electric circuit These methods achieve longer ranges, often multiple kilometer ranges, where the distance is much greater than the diameter of the devices to overcome these drawbacks the technology that offers to free applications from power cords and wall warts will confer a definite salable edge on electronic devices. Applications that would benefit from wireless power range from portable consumer electronics, such as cell phones and MP3 players, which could jettison their wall warts and power adapters, to low-power wireless-sensor networks, which could be free of frequent battery replacement, to medical implants in patients who could avoid surgery to replace batteries
Wireless charging using electromagnetic induction, and resonance magnetic coupling. Effects and limitations, cheallenges faced and meathods to overcome. Success Case study. References included.
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.
Electric Vehicle
Benefits of Electric Vehicle
What is Happening in the world of Electric Vehicle?
Electric Vehicle Charging Types
Wireless Charging
Advantages of Wireless Charging
Dynamic Wireless Charging
Impact of Wireless Charging on the Electric Vehicle Growth
References
Now a days world is shifting towards electrified mobility to reduce the pollutant emissions caused by nonrenewable fossil fueled vehicles and to provide the alternative to pricey fuel for transportation. But for electric vehicles, traveling range and charging process are the two major issues affecting it’s adoption over conventional vehicles.
With the introduction of Wire charging technology, no more waiting at charging stations for hours, now get your vehicle charged by just parking it on parking spot or by parking at your garage or even while driving you can charge your electric vehicle. As of now, we are very much familiar with wireless transmission of data, audio and video signals so why can’t we transfer power over the Air.
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.
Wireless charging using electromagnetic induction, and resonance magnetic coupling. Effects and limitations, cheallenges faced and meathods to overcome. Success Case study. References included.
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.
Electric Vehicle
Benefits of Electric Vehicle
What is Happening in the world of Electric Vehicle?
Electric Vehicle Charging Types
Wireless Charging
Advantages of Wireless Charging
Dynamic Wireless Charging
Impact of Wireless Charging on the Electric Vehicle Growth
References
Now a days world is shifting towards electrified mobility to reduce the pollutant emissions caused by nonrenewable fossil fueled vehicles and to provide the alternative to pricey fuel for transportation. But for electric vehicles, traveling range and charging process are the two major issues affecting it’s adoption over conventional vehicles.
With the introduction of Wire charging technology, no more waiting at charging stations for hours, now get your vehicle charged by just parking it on parking spot or by parking at your garage or even while driving you can charge your electric vehicle. As of now, we are very much familiar with wireless transmission of data, audio and video signals so why can’t we transfer power over the Air.
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.
PROJECT DESCRIPTION
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The main objective of this project is to develop a device for wireless power transfer. The concept of wireless power transfer was realized by Nikolas tesla. Wireless power transfer can make a remarkable change in the field of the electrical engineering which eliminates the use conventional copper cables and current carrying wires.
Based on this concept, the project is developed to transfer power within a small range. This project can be used for charging batteries those are physically not possible to be connected electrically such as pace makers (An electronic device that works in place of a defective heart valve) implanted in the body that runs on a battery.
The patient is required to be operated every year to replace the battery. This project is designed to charge a rechargeable battery wirelessly for the purpose. Since charging of the battery is not possible to be demonstrated, we are providing a DC fan that runs through wireless power.
This project is built upon using an electronic circuit which converts AC 230V 50Hz to AC 12V, High frequency. The output is fed to a tuned coil forming as primary of an air core transformer. The secondary coil develops a voltage of HF 12volt.
Thus the transfer of power is done by the primary(transmitter) to the secondary that is separated with a considerable distance(say 3cm). Therefore the transfer could be seen as the primary transmits and the secondary receives the power to run load.
Moreover this technique can be used in number of applications, like to charge a mobile phone, iPod, laptop battery, propeller clock wirelessly. And also this kind of charging provides a far lower risk of electrical shock as it would be galvanically isolated.
Space-based solar power (SBSP) is the concept of collecting solar power in space (using an "SPS", that is, a "solar-power satellite" or a "satellite power system") for use on Earth.It has been in research since the early 1970s. SBSP would differ from current solar collection methods in that the means used to collect energy would reside on an orbiting satellite instead of on Earth's surface.
Presentation on wireless power transmission:a new science is borne(WPS)Pushpendra Kumar Sharma
This presentation has all necessary information about Wireless Power Transmission (WPS). I hope who ever see this they do not need to find information from other sources about Wireless Power Transmission. THANK YOU.......
Presentation on wireless power transmission:a new science is borne(WPS)
Ppt seminar
1. Wireless Power Transmission
Presented by
Rakesh K.K.
4NM07EC080
Department of Electronics and Communication Engineering
NMAM Institute of Technology, Nitte
2. Overview
• 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
3/7/2013 Wireless Power Transmission 2
3. What is WPT?
• The transmission of energy from one place to
another without using wires
• Conventional energy transfer is using wires
• But, the wireless transmission is made
possible by using various technologies
3/7/2013 Wireless Power Transmission 3
4. Why not wires?
• As per studies, most electrical energy transfer
is through wires.
• Most of the energy loss is during transmission
• On an average, more than 30%
• In India, it exceeds 40%
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5. Why WPT?
• Reliable
• Efficient
• Fast
• Low maintenance cost
• Can be used for short-range or long-
range.
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6. History
• Nikola Tesla in late 1890s
• Pioneer of induction techniques
• His vision for “World Wireless System”
• The 187 feet tall tower to broadcast energy
• All people can have access to free energy
• Due to shortage of funds, tower did not
operate
3/7/2013 Wireless Power Transmission 6
7. History (contd…)
• Tesla was able to transfer energy from one coil
to another coil
• He managed to light 200 lamps from a
distance of 40km
• The idea of Tesla is taken in to research after
100 years by a team led by Marin Soljačid from
MIT. The project is named as ‘WiTricity’.
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8. Energy Coupling
• The transfer of energy
– Magnetic coupling
– Inductive coupling
• Simplest Wireless Energy coupling is a
transformer
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9. 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
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10. Inductive coupling
• Primary and secondary coils are not
connected with wires.
• Energy transfer is due to Mutual Induction
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11. Inductive coupling (contd…)
• Transformer is also an example
• Energy transfer devices are usually air-cored
• Wireless Charging Pad(WCP),electric brushes
are some examples
• On a WCP, the devices are to be kept, battery
will be automatically charged.
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12. Inductive coupling(contd…)
• Electric brush also charges using inductive
coupling
• The charging pad (primary coil) and the
device(secondary coil) have to be kept very
near to each other
• It is preferred because it is comfortable.
• Less use of wires
• Shock proof
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13. Resonance Inductive Coupling(RIC)
• Combination of inductive coupling and
resonance
• Resonance makes two objects interact
very strongly
• Inductance induces current
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14. How resonance in RIC?
• Coil provides the inductance
• 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
• Radiation loss will be negligible
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17. WiTricity
• Based on RIC
• Led by MIT’s Marin Soljačid
• Energy transfer wirelessly for a distance
just more than 2m.
• Coils were in helical shape
• No capacitor was used
• Efficiency achieved was around 40%
3/7/2013 Wireless Power Transmission 17
19. WiTricity… Some statistics
• Used frequencies are 1MHz
and 10MHz
• At 1Mhz, field strengths
were safe for human
• At 10MHz, Field strengths
were more than ICNIRP
standards
3/7/2013 Wireless Power Transmission 19
20. WiTricity now…
• No more helical coils
• Companies like Intel are also working on
devices that make use of RIC
• Researches for decreasing the field
strength
• Researches to increase the range
3/7/2013 Wireless Power Transmission 20
21. RIC vs. inductive coupling
• RIC is highly efficient
• RIC has much greater range than inductive
coupling
• RIC is directional when compared to inductive
coupling
• RIC can be one-to-many. But usually inductive
coupling is one-to-one
• Devices using RIC technique are highly
portable
3/7/2013 Wireless Power Transmission 21
22. Air Ionization
• Toughest technique under
near-field energy transfer
techniques
• Air ionizes only when
there is a high field
• Needed field is 2.11MV/m
• Natural example:
Lightening
• Not feasible for practical
implementation
3/7/2013 Wireless Power Transmission 22
23. Advantages of near-field techniques
• No wires
• No e-waste
• Need for battery is
eliminated
• Efficient energy
transfer using RIC
• Harmless, if field
strengths under
safety levels
• Maintenance cost is
less
3/7/2013 Wireless Power Transmission 23
24. Disadvantages
• Distance constraint
• Field strengths have to be under safety levels
• Initial cost is high
• In RIC, tuning is difficult
• High frequency signals must be the supply
• Air ionization technique is not feasible
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25. Far-field energy transfer
• Radiative
• Needs line-of-sight
• LASER or microwave
• Aims at high power transfer
• Tesla’s tower was built for this
3/7/2013 Wireless Power Transmission 25
26. Microwave Power Transfer(MPT)
• Transfers high power from one place to
another. Two places being in line of sight
usually
• Steps:
– Electrical energy to microwave energy
– Capturing microwaves using rectenna
– Microwave energy to electrical energy
3/7/2013 Wireless Power Transmission 26
27. MP T (contd…)
• AC can not be directly converted to microwave
energy
• AC is converted to DC first
• DC is converted to microwaves using
magnetron
• Transmitted waves are received at rectenna
which rectifies, gives DC as the output
• DC is converted back to AC
3/7/2013 Wireless Power Transmission 27
28. LASER transmission
• LASER is highly directional, coherent
• Not dispersed for very long
• But, gets attenuated when it propagates
through atmosphere
• Simple receiver
– Photovoltaic cell
• Cost-efficient
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29. Solar Power Satellites (SPS)
• To provide energy to earth’s increasing
energy need
• To efficiently make use of renewable
energy i.e., solar energy
• SPS are placed in geostationary orbits
3/7/2013 Wireless Power Transmission 29
30. SPS (contd…)
• Solar energy is captured using photocells
• Each SPS may have 400 million photocells
• Transmitted to earth in the form of
microwaves/LASER
• Using rectenna/photovoltaic cell, the energy is
converted to electrical energy
• Efficiency exceeds 95% if microwave is used.
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31. Rectenna
• Stands for rectifying antenna
• Consists of mesh of dipoles and diodes
• Converts microwave to its DC equivalent
• Usually multi-element phased array
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32. Rectenna in US
• Rectenna in US receives 5000MW of power
from SPS
• It is about one and a half mile long
3/7/2013 Wireless Power Transmission 32
34. LASER vs. MPT
• When LASER is used, the antenna sizes can be
much smaller
• Microwaves can face interference (two
frequencies can be used for WPT are 2.45GHz
and 5.4GHz)
• LASER has high attenuation loss and also it
gets diffracted by atmospheric particles easily
3/7/2013 Wireless Power Transmission 34
35. Advantages of far-field energy transfer
• Efficient
• Easy
• Need for grids, substations etc are eliminated
• Low maintenance cost
• More effective when the transmitting and
receiving points are along a line-of-sight
• Can reach the places which are remote
3/7/2013 Wireless Power Transmission 35
36. Disadvantages of far-field energy trasnfer
• Radiative
• Needs line-of-sight
• Initial cost is high
• When LASERs are used,
– conversion is inefficient
– Absorption loss is high
• When microwaves are used,
– interference may arise
– FRIED BIRD effect
3/7/2013 Wireless Power Transmission 36
37. Applications
• 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)
3/7/2013 Wireless Power Transmission 37
38. Conclusion
• Transmission without wires- a reality
• Efficient
• Low maintenance cost. But, high initial cost
• Better than conventional wired transfer
• Energy crisis can be decreased
• Low loss
• In near future, world will be completely wireless
3/7/2013 Wireless Power Transmission 38
39. References
• S. Sheik Mohammed, K. Ramasamy, T. Shanmuganantham,” Wireless
power transmission – a next generation power transmission
system”, International Journal of Computer Applications (0975 – 8887)
(Volume 1 – No. 13)
• Peter Vaessen,” Wireless Power Transmission”, Leonardo
Energy, September 2009
• C.C. Leung, T.P. Chan, K.C. Lit, K.W. Tam and Lee Yi Chow, “Wireless Power
Transmission and Charging Pad”
• David Schneider, “Electrons unplugged”, IEEE Spectrum, May 2010
• Shahrzad Jalali Mazlouman, Alireza Mahanfar, Bozena Kaminska, “Mid-
range Wireless Energy Transfer Using Inductive Resonance for Wireless
Sensors”
• Chunbo Zhu, Kai Liu, Chunlai Yu, Rui Ma, Hexiao Cheng, “Simulation and
Experimental Analysis on Wireless Energy Transfer Based on Magnetic
Resonances”, IEEE Vehicle Power and Propulsion Conference
(VPPC), September 3-5, 2008
3/7/2013 Wireless Power Transmission 39
40. References(contd…)
• André Kurs, Aristeidis Karalis, Robert Moffatt, J. D.
Joannopoulos, Peter Fisher and Marin Soljačid, “Wireless
Power Transfer via Strongly Coupled Magnetic
Resonances”, Science, June 2007
• T. R. Robinson, T. K. Yeoman and R. S.
Dhillon, “Environmental impact of high power density
microwave beams on different atmospheric layers”,
• White Paper on Solar Power Satellite (SPS)
Systems, URSI, September 2006
• Richard M. Dickinson, and Jerry Grey, “Lasers for Wireless
Power Transmission”
• S.S. Ahmed, T.W. Yeong and H.B. Ahmad, “Wireless power
transmission and its annexure to the grid system”
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