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Directory:Wireless Transmission of Electricity

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Wireless energy transfer, also known as wireless energy transmission, is the process that takes place in any system where electromagnetic energy is transmitted from a power source (such as a Tesla coil) to an electrical load, without interconnecting wires. Wireless transmission is employed in cases where interconnecting wires are inconvenient, hazardous, or impossible. Though the physics can be similar (pending on the type of wave used), there is a distinction from electromagnetic transmission for the purpose of transferring information (radio), where the amount of power transmitted is only important when it affects the integrity of the signal.

"Two coils with a matched resonance at the exact matching frequency on both ends = wireless power."


Contents

History

Wireless technology goes back to Tesla's experiments in Colorado in the early 1900s.

When Tesla died, the government took all of his papers and classified them. They did return most of those papers to Tesla's country of birth, but it would appear that the U.S. Government withheld some of those papers to hide certain technology from the public.

Wireless transmission of electricity, Tesla style, would have circumvented the metering of energy, abundantly available. That is why J.P. Morgan took the financing away from Tesla when he was building the Wardenclyffe tower on Long Island to supply wireless power to the world.

Research and Development

Intel

  • Intel gets into the wireless electricity game - Intel, the world's largest chip manufacturer, demonstrated a form of wireless energy transfer by lighting a 60-watt bulb from a power source three feet away, in an effect they referred to as WREL (wireless resonant energy link). If the trick sounds familiar, that's because researchers from the Massachusetts Institute of Technology (MIT) reported the same thing last year under the moniker WiTricity. (YouTube)(Thanks Susan) (Scientific American; Aug. 22, 2008)

MIT WiTricity

  • MIT's Wireless Power - In the spirit of Tesla's dream of wireless power, MIT physicist Marin Soljacic is working on a way to transmit power wirelessly, both efficiently and safely. Now his work has made MIT Technology Review's TR10 list for 2008. (MIT Technology Review; March/April 2008)
  • Electricity in the Air - If cord-free power delivers on its promise, our "wireless" world will finally live up to the name. Ramifications of MIT's work on WiTricity, bringing Tesla's dream to fruition. (Popular Science; Jan. 23)
  • MIT Wirelessly Powers a Lightbulb - A team from MIT has experimentally demonstrated lighting a 60W light bulb from a power source seven feet (more than two meters) away; there was no physical connection between the source and the appliance. The MIT team refers to its concept as “WiTricityâ€? (as in wireless electricity). (PhysOrg; June 7, 2007) (See Slashdot discussion)

Other Groups

  • Recharging Gadgets Wirelessly - A Delaware-based startup called WildCharge is selling a small metal pad, about the size of a sheet of paper, that can simultaneously charge multiple devices laid on top of it--as long as they're equipped with adaptors. (MIT Technology Review; Dec. 13, 2007)
  • Plastic sheet delivers wireless power - Japanese researchers have developed a flexible plastic sheet that can wirelessly transmit power to electronic devices. Desks and walls could one day light up electronics without need for cables. (Nature; Apr. 29, 2007)
  • Plastic Sheet of Power - Printing flexible electronics on plastic provides a way to wirelessly power gadgets. Researchers at the University of Tokyo have demonstrated a prototype that consists of plastic and flexible electronics, and can wirelessly supply power to any device that touches its surface. (MIT Technology Review; Dec. 14, 2006)
  • Charging Batteries without Wires - New MIT research reveals a way to send wireless energy to mobile phones and laptops using the principle of resonance. (MIT Technology Review; Nov. 15, 2006) (See also BBC)

Information

Theory

Related patents

Comments

See Discussion page

See also

- Other Directory listings • Latest • A-I • J-R • S-Z • Tree • News
- PESWiki home page

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