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Re: [Phys-L] news story



I stand corrected.

In July 2011, the USU Research Foundation demonstrated 90 percent electrical transfer efficiency of five kilowatts over an air gap of 10 inches.
http://usu.edu/ust/index.cfm?article=51862

It would be nice if the original article had been a bit more specific.

This development is rather mind-boggling (to my rather limited mind, at lest).

Where has it been hiding for the last two years?



On Aug 15, 2013, at 3:24 PM, Bernard Cleyet <bernard@cleyet.org> wrote:


On 2013, Aug 14, , at 18:31, Chuck Britton <cvbritton@mac.com> wrote:

Your toothbrush charger has a magnetic stub that sticks up into the brush so the gap between the two coils isn't too large.
How big a gap is there between the pavement 'coils' and the bus's receiver coil?

And what do the 'in-pavement' coils look like?
A long series of separate coils that are fired up as the bus passes or is the entire pavement energized all the time?
Too complex and inefficient to be viable with today's technology.


did you tell that to the U of Utah?

bc
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