Demo of Short-Range Wireless Power Transfer
If you're having trouble loading the page, here is the direct link to the PDF: https://s3-us-west-1.amazonaws.com/disneyresearch/wp-content...
Here are the YouTube videos:
TLDR: Demo shows that in a 54 m3 specially designed room that it is possible deliver power to small coil receivers in nearly any position with 40% to 95% efficiency — and 1900 watts can be transmitted to a coil receiver enabling safe and ubiquitous wireless power.
Avg whole body SAR limit they use is .08W/kg. For reference, IEC 60601 governs the SAR limit for MRIs at 2-10W/kg [1]. Also, FCC limits cell phones to 1.6W/kg [2].
[1] https://en.wikipedia.org/wiki/Specific_absorption_rate#MRI_s...
[2] https://en.wikipedia.org/wiki/Specific_absorption_rate#Mobil...
From the article: "While QSCR enabled spaces do require purpose-built structures, as the walls must be conductive, it offers a substantial improvement in the tradeoff between range and the magnitude of power that can be safely delivered."
Think theme park and sound stage, not home and office.
Neat stuff!
Notes:
- pacemaker warning sign on the edge of the doorframe
- Frequency smack in the middle of the AM band (1.32 MHz)
- demo'ing very low power consumers
- very directionally sensitive (just like any other radio transmitter)
- room is set up like a Faraday cage
Core issue with the solution appears to be that the faraday cage used by the room would require any wireless wifi/cell access points be inside the room, otherwise they would be blocked.
What could you do with this? A small drone that hangs in the air indefinitely?
Just what the world needs, less power efficiency.
Man that is awesome. Wouldn't mind that. I guess although you'd only use a quarter of it, that pole wouldn't look bad in a corner of a room. But they did say they could shrink it. Maybe you'd just tape some wires on your walls that blend in to the color of your walls for that pole part.
I wish them well.
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!
Pretty neat demo, sitting inside a loaded cavity resonator. Probably not very practical, but still cool.
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Tesla would be proud.
From the uBeam discussions, I thought this was impossible
This don't have any harm to health?
Disney if friggin' weird. No thanks.
this is all cool, but those fields created all around the room could affect (charge?!:) us as well; we are after all electrical beings before we are biological beings; so how is the presence of such fields all around us for extended number of hours daily for a lifetime (or half of lifetime) is affecting human health?