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Saturday, March 15, 2014

Wireless electricity

Although this is not a tech blog, I must direct your attention to this story about wireless electricity. Is it possible that Tesla's great dream has finally become real?
"We're going to transfer power without any kind of wires," says Dr Hall, now Chief Technology Officer at WiTricity -- a start-up developing wireless "resonance" technology.

"But, we're not actually putting electricity in the air. What we're doing is putting a magnetic field in the air."

It works like this: WiTricity build a "Source Resonator" -- a coil of electrical wire that generates a magnetic field when power is attached.

If another coil is brought close, an electrical charge can be generated in it. No wires required.
Obviously, this new tech -- if it proves to be really real -- will change every aspect of our lives. The part that really intrigues me concerns electric cars. Eco-friendly vehicles will suddenly become quite practical when every driveway and parking spot becomes an automatic recharge station.
"We just don't think about it anymore: I'm going to drive my car home and I'm never going to have to go to the gas station and I'm never going to have to plug it in.

"I can't even imagine how things will change when we live like that."
This could drastically reduce our dependence on foreign oil. It's much easier to implement radical new energy sources when we're talking about a city's power generating stations, as opposed to the internal combustion engine.
Hey, inductor coils have been aroun for over century...every transformer uses one
Wouldn't seem to be a great idea for those like me, with a pacemaker.
Yeah, they're nothing new. And are increibly inefficient. Inverse square and all that.

On the other hand, I was recently reading about a form of wireless electricity that harvested electric from the atmosphere, from the massive waste power of radio signals, mobile phone signals and especially wifi signals. That's nothing new either, the first radio sets, crystal sets, powered the speakers by harvesting electricity from the radio signal itself. Not enough power for a car, though. Maybe a phone if they start being more efficient rather than more powerful.

For electric cars, some sort of battery or capacitor advancement would be better. They are, however, quite usable already.
I read a very interesting book about Tesla and Edison
which mrs. joseph thought was about the band.
Joseph; OT. Have you seen?


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