Wireless Power Supplies Using Magnetic Resonance
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Date posted: 16/05/2010
Posted by: Site Administration
This story is from the category
 Computing Power

Until now domestic manufacturers and research institutions have only been focused on the concept that magnetic resonance could be used for wireless power supplies. Companies like Sony Corp. and Toshiba Corp. of Japan have worked out details on extending the range of this technology toward practical applications. University of Tokyo of Japan and Kyoto University of Japan has clearly aimed this technology for practical wireless power supply applications.

In 2007 MIT research team outlined a public experiment where they used magnetic resonance to light up a 60 watt bulb. The coil operated at a frequency of approximately 10 MHz, with a Q factor of 950. The Q factor of a coil is determined by (2πf)L / R, where f= frequency, L =coil inductance and R=coil resistance. A Q factor greater than 1000 is difficult to achieve.

A magnetic resonance wireless power supply system was discussed in one paper that?s prototyped by the Arakawa & Komurasaki Laboratory of the University of Tokyo together with DENSO Corp. of Japan. Professor Kimiya Komurasaki of the Department of Advanced Energy, Graduate School of Frontier Science at the University, stated: "The system can supply power not only to mobile phones and notebook PCs, but also objects moving freely in free space."

With the prototype system researchers studied the relationship of the resonator?s position within three-dimensional space to transfer efficiency.

See the full Story via external site: www.physorg.com