Þráðlaust rafmagn komið lang á leið

The MIT researchers who developed the "WiTricity" wireless power technology haven't set their sights on global broadcast power just yet, but the team is already envisioning wirelessly transmitting power to laptops or cell phones across an office or inside a house. Because the power stream can be consistent, the devices would not even need batteries.

  Along with LPs, audio tape, and dial-up modems, children of the future might wonder what a "power cord" was. A team of researchers from MIT has demonstrated such a future, when they were recently able to light a 60-watt light bulb from an unconnected source about seven feet away.

Team leader Professor Marin Soljacic describes the "eureka" moment as one he experienced in his pajamas a few years ago. He was looking at his cell phone on the kitchen counter. "It was probably the sixth time that month that I was awakened by my cell phone beeping to let me know that I had forgotten to charge it," he said in a statement. "It occurred to me that it would be so great if the thing took care of its own charging."

Two copper coils, each a self-resonant system, become the resonant couple. One is attached to a power source and acts as the transmitter. It emits a nonradiative magnetic field that is oscillating in the MHz range. The other coil resonates with this field, and receives the transmission. MIT physics undergraduate Robert Moffatt noted that this arrangement means that "most of the power not picked up by the receiving coil remains bound to the vicinity of the sending unit, instead of being radiated into the environment and lost."

http://www.sci-tech-today.com/story.xhtml?story_id=0320003QDCRK&page=1

Athugasemdir

[Bjarni Freyr Guðmundsson, 16.9.2007 kl. 11:52]

Er þá ekki bara spurning um hvenar við förum að svífa um ;) en takk fyrir góðar ábendingar um greinar. Þetta er eitthvað sem er án efa áhugavert að lesa um.

[Arnór (IP-tala skráð) 16.9.2007 kl. 22:27]

ha hvaða ábendingar? ég er nú bara að setja inn hérna fyrir kúrs í HÍ, getur kíkt svona einu sinni í viku og þá verður eitthvað nýtt tæknitengt :P