Demo of Short-Range Wireless Power Transfer

Re:Demo of Short-Range Wireless Power Transfer by jwatte on Friday February 17, 2017 @12:31AM (#13666174)

40% efficient, so let's just generate 2.5x as much electricity! (Oh, and remove all of that extra heat with more air conditioning, too!)

Even at 95%, I wouldn't want a 1900W cool near my body for fear of burns. (Compare 100W light bulb)

Finally, what do other electronics do within this field? It's not like there aren't already lots of coils (inductors) that would now have to worry about significant RF back power!

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Re:Demo of Short-Range Wireless Power Transfer by IanCal on Friday February 17, 2017 @05:01AM (#13667172)

It depends heavily on what you're doing though, as to what the tradeoffs are. A simple example: remote controls use very little energy and the extra energy required at 40% efficiency would probably easily pay for the energy cost of creating / replacing the batteries. Phones, similarly, use very little actual energy.

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