Researchers Not Giving Up On Dream Of Wireless Power

from the but-I'm-not-the-only-one dept

At some point or another, everybody's fantasized about it: wouldn't it be great if an electronic device could be powered wirelessly, fully eliminating the need for cables? It's an idea that's been talked about for a long time, back to the work of Nikola Tesla. Now a new team of researchers at MIT is going after the problem again. They believe that there's solid physics backing the idea up, and in fact their research builds on Tesla's original work. Still, this is firmly at the theoretical stages. Consider how long it's taking for fuel cell powered mobile devices to take off. We can safely say that this will take a much, much longer, if it ever comes about.

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  1. identicon
    Anonymous Coward, 15 Nov 2006 @ 12:00pm

    anyone got any transmission/power equations? id like to see the model they use. the mit article shows a funky little antenna on each device. they mention resonance. how does this play into everything? current through a resistive circuit will cause a voltage drop (i.e. heating of the coil) that will dampen the actual power, right? just like you can have a resonance frequency on a spring, but have it follows under the forces of friction. in my physics classes, we tried to play this this resonance idea. for "smooth" systems (i.e. lubed up track cars) you could get resonance at small amplitudes. however for a system such as a block on sandpaper, the amplitude had to be much higher to account for the loss due to friction.

    so, please somebody correct me if i'm wrong. i'm only a 3rd semester engineering student.

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