Witricity PPT
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The seminar presentation discussed wireless power transmission using WiTricity technology. There are three types of wireless power that differ in range and transfer method: short range uses inductive coupling, medium range uses resonant induction, and long range uses electromagnetic waves. WiTricity provides wireless power transfer through resonant magnetic fields that can penetrate obstacles and is safe for living beings. The technology could make devices more convenient by eliminating power cords and batteries, and more environmentally friendly by reducing disposable battery usage.
Witricity PPT
- 3. Electricity without wires WiTricity 11/23/14 3
- 4. In 1899, Sir Nikola Tesla Proposed a method of Wireless Power Transmission. As it is in Radiative mode, most of the Power was wasted and has less efficiency. WiTricity 11/23/14 4
- 5. The idea of wireless electricity has been around since the early days of the Tesla coil. But thanks to a group of MIT scientists, team led by Marin Soljačić and named it "WiTricity" WiTricity 11/23/14 5
- 7. There are 3 major types , each with different ranges, methods of transfer – Short range: Inductive Coupling – Medium range: Resonant Induction – Long range: Electromagnetic Wave Power Transfer WiTricity 11/23/14 7
- 8. Magnetic coupling occurs when two objects exchange energy through their varying or oscillating magnetic fields. Resonant coupling occurs when the natural frequencies of the two objects are approximately the same. WiTricity 11/23/14 8
- 12. There are witricity power sources(transmitter) and capture devices(receiver). Power source provides power to the devices where as capture device captured it to work. Power source and capture devices are specially designed ‘‘strongly-coupled’’ resonators for midrange wireless non-radiative energy transfer WiTricity 11/23/14 12
- 13. Highly Resonant Strong Coupling Provides High Efficiency Over Distance Energy Transfer via Magnetic Near Field Can Penetrate and Wrap Around Obstacles Non-Radiative Energy Transfer is Safe for People and Animals Flexible Geometry Allows WiTricity Devices to be Embedded Into Different Products WiTricity 11/23/14 13
- 14. It will make products : • More Convenient: -No manual recharging or changing batteries. -Eliminate unsightly, unwieldy and costly power cords. • More Reliable: -Never run out of battery power. • More Environmentally Friendly: -Reduce use of disposable batteries. -Use efficient electric ‘grid power’ directly instead of inefficient battery Charging. WiTricity 11/23/14 14
- 15. Safe, fairly efficient, good range Boon for the devices which uses midrange power No need of line of sight. No need of power cables and batteries. Magnetic fields interact weakly with biological masses (humans), and energy is only transmitted between resonating objects WiTricity 11/23/14 15
- 16. Transmissions possible only in few meters Possibility of “energy theft” Efficiency decreases with distance The resonance condition should be satisfied and if any error exists, there is no possibility of power transfer. It can not penetrate through METAL WALL WiTricity 11/23/14 16
- 18. Direct Wireless Power—when all the power a device needs is provided wirelessly, and no batteries are required. This mode is for a device that is always used within range of its WiTricity power source. Automatic Wireless Charging—when a device with rechargeable batteries charges itself while still in use or at rest, without requiring a power cord or battery replacement. This mode is for a mobile device that may be used both in and out of range of its WiTricity power source WiTricity 11/23/14 18
- 19. Consumer electronics Transportation Industry applications Other applications › Medical devices › Military applications › Robots WiTricity 11/23/14 19
- 20. Witricity’s Technology Technology Benefit Highly resonant strong coupling High efficiency over distance Energy transfer via magnetic Can penetrate and wrap near field around obstacles Non radiative energy transfer Safe for living beings and other environmental objects Scalable design From Mw to kW Flexible geometry Device that can fit into OEM (original equipment manufactures)products WiTricity 11/23/14 20
- 21. Will it harm me? Will it harm the environment? Will it interfere with important communication? NO WiTricity 11/23/14 21
Editor's Notes
- #4: Currently, wired electricity powers nearly everything. It travels through wires in the form of Alternating Current electricity, and powers most of our devices. Wireless trasmission of energy will remove our dependency on wires
- #5: Tesla coil
- #6: MIT powered 60 watt light bulb from 2 meters (7 ft) at 40% efficiency
- #8: Splashpower Ltd. is a United Kingdom-based company founded in June 2001
- #10: electromagnetic waves are harmless as long as they’re transferred at the right frequency.
- #16: Need more light in your office, no need for electrician. Simply place the lamp where ever you need it.
- #17: will this possibly cause Luekemia or some kind of cancer. That fear is always raised about those living near large power transformers and lines. The fear has never been scientifically justified as being true but if this wireless power were in every room in every house in the United States it would be a matter of time before we would possibly know because the numbers of Leukemia patients would probably drastically go up
- #20: in the macroscopic world, this scheme could potentially be used to deliver power to robots and/or computers in a factory room, or electric buses on a highway (source-cavity would in this case be a ‘‘pipe’’ running above the highway). In the microscopic world, where much smaller wavelengths would be used and smaller powers are needed, one could use it to implement optical inter-connects for CMOS electronics, or to transfer energy to autonomous nano-objects (e.g. MEMS or nanorobots) without worrying much about the relative alignment between the sources and the devices.