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#188205 - 07/25/09 01:36 AM wireless electricity?  
Niko  Offline
Member
Joined: Aug 2006
Posts: 356
Campbell, CA
what are your thoughts on this? Do you think it will be a hit? It does not smell like like a snake oil to me.

http://www.witricity.com/

We have that happening everyday in transformers. And even though there are no solid proofs that the magnetic fields of transmission lines cause cancer, how will the effect be with the magnetic field between two points??


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#188211 - 07/25/09 05:10 AM Re: wireless electricity? [Re: Niko]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,103
Estero,Fl,usa
Tesla had this idea but he could never really make it work. On a small scale it works (radio broad casts) but you run into problems when you ramp up the power. To start with I don't believe you won't be doing this at 50-60hz. I also wonder how you keep from collecting energy where you don't want it.


Greg Fretwell

#188215 - 07/25/09 01:29 PM Re: wireless electricity? [Re: gfretwell]  
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
Lots of people are convinced that cell phones and powerlines cause cancer or other problems. Can you imagine the uproar if we started delivering actual useful amounts of raw power via electromagnetic radiation, where negative bioeffects might be a real possibility?


#188224 - 07/25/09 08:51 PM Re: wireless electricity? [Re: NJwirenut]  
Obsaleet  Offline
Member
Joined: Apr 2003
Posts: 362
Pa
I first I thought this would put us out of business but then I relized , it still needs to be wired and managed. Probably with more service issues than ever:)

Obsaleet


Choose your customers, don't let them choose you.

#188254 - 07/27/09 02:05 PM Re: wireless electricity? [Re: Obsaleet]  
SteveFehr  Offline
Member
Joined: Mar 2005
Posts: 1,208
Chesapeake, VA
It's too lossy to be more than a niche. It would be nice to be able to transfer small amounts of power wirelessly- like to power clocks without a cord or to charge cell phones while still in your pocket, etc. But because everything remotely conductive will have current induced upon it, the losses are enormous.

Not to mention the transmitters are giant inductors that must be MUCH larger than the loads they serve (inverse square law), and will end up creating terrible power factor problems if widely fielded.



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