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Intel Demos Wireless "Resonant" Recharging
Al writes "Last Thursday researchers from Intel demonstrated a way to recharge electronics from about meter away using a 'resonant' magnetic field. At an event held at the Computer History Museum in Mountain View, the researchers showed off a pair of iPod speakers connected to a 30-centimeter-wide copper coil that received power from a similar, but larger, copper coil about a meter away. The recharging technique relies on a phenomenon called resonant coupling, in which objects can exchange energy when tuned to resonate at the same frequency. A similar approach was developed by researchers at MIT in 2007, and spun off into a company called WiTricity. This company has already developed a few products that use resonant coupling to recharge, including a car battery."
Pacemakers lol?
Seriously, this is nothing more than a simple application of a simple science experiment.
Wireless fields / broadcasts are a joke, and until we change the laws of physics, always will be. (Directed transmissions are not a joke.)
As everyone's credit cards were erased during the demo.
They did expect users with paper currency and PMs would be more open to purchase.
I'm having a little trouble here with the concept. Instead of small white box plugged into the wall we have these freaking huge copper wires running in circles everywhere. Just doesn't jibe with the trendy iPod image.
Can you imagine a Beowulf cluster of these things?
Faster! Faster! Faster would be better!
Isn't resonant vibration the way tons of energy transfers occur, including plain old radio communication?
What makes this so novel?
what is the power consumption of the transmitting coil when there is no load coil, also, does the power consumption increase or decrease based on the number of receiving coils??
and, what happens if you place a HDD, or your phone contains a HDD and is charged using this method, wont the magnetic field damage the magnetic media??
similarly, magnetic fields can mess up CRT's, try taking a magnet to a CRT screen..
i always wondered what that coil was for
NicolaTesla
he was recharging his ipod!!!
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....it's called 'using batteries'. With a 3 meter range and relatively huge copper coils involved, how is this better that using batteries? Most devices use a transformer to customize the input for the device. With wireless power, would each device need some kind of special wireless receiver/transformer? And this would be better how?
I judt got a nre Kinesis keybiartf so please excusr ant egregiou typos.
Did they ensure that the iPod speakers were properly shielded against RDF interference? Now that Jobs is getting his strength back, I fully expect that Apple devices will discard with batteries completely and just feed off his sheer willpower.
When you have nothing left to burn you must set yourself on fire
Anybody familiar with the efficiency of this process? What fraction of the wattage is lost during transfer?
Aeroespacio.org
Nikola Tesla and that crazy discovery of wireless energy transfer. Next time you power up your gizmo (via AC to DC conversion) raise a glass to the man who started it all!
So in this era of concern about energy supplies, we have a new way to charge our phones that is less efficient and will waste a ton of energy. But at least we won't trip over any cables.
I read about this sort of thing awhile ago. http://www.pwrmat.com/ There would be some nifty applications, you could build this sort of power distribution system into a wall. Then you just have to be within the proximity of the distributor. It would primarily be a convince/lazy thing, but at least you wouldn't have to worry about your kid putting a fork in a wall socket. Then again by doing that you could be removing a natural selection factor and end up with even more stupid people that otherwise would have been electrocuted and taken out of the gene pool.
There are at least four schemes for short-range wireless power transmission around. This needs to be standardized so it can be deployed.
The very short range ones, which couple a tabletop pad to a device on it, would be most useful. All the little stuff that needs recharging should be on the same system, with recharging pads in bedroom, office, hotel room, car, airline tray table, Starbucks, etc. Unless the players get together and agree on a standard, this is going nowhere.
Tesla would be so proud, many years later we are finally honing and putting to use technology that was before it's time.
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A company I worked for was charging the batteries in medical implants in this manner 10 years ago. In fact, the implant's charge coil is inside its Titanium case. The magnetic field goes right through the case. The charger had a class E amplifier. It worked very well. I would not doubt if this company already has a patent on this technique.