3 ms·
Resonant wireless power transfer has the (often undesirable) effect of de-tuning when you have multiple resonant loads in range. In short, the "resonant peak"
by beambot 14y ago
Resonant wireless power transfer has the (often undesirable) effect of de-tuning when you have multiple resonant loads in range. In short, the "resonant peak" dis-associates into two (or more) peaks, which ruins efficiency. Not to mention the effects of material composition (metal => bad).
To date, the only proposed approach to this problem is time division multiplexing (TDM) on each device and/or adaptive frequency tuning at the transmitter (which has regulatory issues). AFAIK, this is the same problem plaguing the other resonant wireless power transfer companies (eg. Witricity).
[I played around with a bit of this stuff during grad school. Specifically, I used non-resonant magnetic coupling to wirelessly power a swarm of robots: http://www.hizook.com/blog/2008/10/07/wirelessly-powering-swarm-robots http://www.hizook.com/blog/2008/10/07/wirelessly-powering-sw... ]
- kirillzubovsky 14y agoWouldn't it be great though, if they could get it absolutely right? Bloggers had complained before that Lumia has wireless charging and iphone doesn't, but this article answers that problem very well - Apple isn't just trying to solve wired problem with a 20% improvement, they want a 200% improvement. I hoep they can get this right. Would sure be great to have all my i-devices charge as they sit here on the desk.
- peteretep 14y agoI hope Apple don't get it right, because I'm really not sure I can handle hearing: "wah wah Apple didn't actually /invent/ wireless charging, you know" attached to every mention of the iCharge (circa 2015).
- buster 14y agoAnd i hope Apple doesn't get it right because of the next patent wars about that stuff and because of all that media buzz again and again. Makes me sick.