Most likely it will take this form:<br><a href="http://www.powermatdigital.com">http://www.powermatdigital.com</a><br><br>where a transmission plate can be embedded in the floor and devices will receive their power when placed above these plates. If economically feasible, a large plate could span over every room in a house and all lights and appliances would couple to it by just setting them down (with special tables for those things that don't sit directly on the floor).<br>
<br>As for EVs, I think this will be the eventual trend -- allowing power plates to be embedded in designated parking spots and our cars will couple to the power source by simply parking over these spots. A coupler may need to drop down from the car to the ground for better efficiency, but the point is that it will be simple, integrated and eliminate cords and exposed connections. I think this is the only way EVs will be broadly accepted into our American society -- i.e. there is no extra effort and they seem no different than any other car.<br>
<br>In the short term, however, we still need to plug in and it would be good to have public places where our cars could be recharged (e.g. grocery stores, shopping malls, park & rides, etc.). Has anyone tried to approach local stores and restaurants about this? I would only advocate talking to folks who have existing outdoor outlets near their parking lots, rather than going to the expense of installing anything new.<br>
<br>Thanks,<br><br>Gary<br><br><br><br><div class="gmail_quote">On Thu, Jan 22, 2009 at 7:21 AM, Joby Wieser <span dir="ltr"><<a href="mailto:sleeper02_14_06@yahoo.com">sleeper02_14_06@yahoo.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
I have been confused by this technology. It seems like with all the interest in environmentally friendly, energy efficient solutions that this wireless charging would be a non starter.<br>
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Can the magnetic resonant version ever be as energy efficient as a wire cable?<br>
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No it can't. When any kind of magenetic field travels through the air it looses strength exponentially with distance. Thats why a 50,000 watts leaving a radio antenna is picked up by your receiver in the nanowatt range.<br>
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Putting your cell phone on a pad to charge wont be too wastefull but the idea of powering all the appliances in a home without plugs would be very costly.<br>
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Joby<br>
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