Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>
Tesla list wrote:
Original poster: Ed Phillips <evp@xxxxxxxxxxx>
Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>
There is a note in the Scientific American magazine about recent
research on wireless energy transfer:
http://www.sciam.com/article.cfm?chanID=sa004&articleID=E87D47E5-E7F2-99DF-3AE75A880501B215
With a link to a paper:
http://arxiv.org/abs/physics/0611063
Antonio Carlos M. de Queiroz"
Did you find anything in that paper which was new other than
the fancy simulations and graphics and obscure terminology? I
read it when it first came out and seems to me those guys think
they're the first ones to discover that two resonant circuits
tuned to the same frequency will couple energy and that the higher
the Q the better the coupling?
They don't seem to claim anything unreasonable in the way of
efficiency. Although they mention a Tesla patent (Wardenclyffe
transmitter with no receiver mentioned) I don't think they are at
all aware of his World Power System patents or what he was doing at
Colorado Springs over 100 years ago. His big "primary around the
room" with tuned coils inside it pretty well represents their
proposed laptop computer charging setup.
I'd be interested in your comments as the paper annoyed me and
I was surprised it got published.
I don't see anything new on the paper, except for the simulations
trying to evaluate quantitatively what can be achieved. The result
is the expected low efficiency. The authors appear to be aware of
the work by Tesla. I think that with the fast progress in the
development of very low power electronic devices, it may be
practical to power some devices without wires, as is already done
with RFID tags. But due to the low efficiency, this technique will
never be used to power anything needing more than microwatts, a few
meters away at most.
Antonio Carlos M. de Queiroz