<div>Just remember microwave ovens cook meat at 2.4 ghz.</div>
<div>Any power transmission at lower frequencies can do the same under the right concentrations.<br><br></div>
<div class="gmail_quote">On Thu, Jan 22, 2009 at 2:37 PM, John Allen <span dir="ltr"><<a href="mailto:johntallen55@gmail.com">johntallen55@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">The article states the efficiency of the charging pad is 90%, not sure about<br>over the air at greater than 85 foot distances.<br>
<br>John T.<br>
<div class="Ih2E3d"><br>-----Original Message-----<br>From: <a href="mailto:ausev-bounces@austinev.org">ausev-bounces@austinev.org</a> [mailto:<a href="mailto:ausev-bounces@austinev.org">ausev-bounces@austinev.org</a>] On<br>
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<div class="Wj3C7c">Behalf Of <a href="mailto:jefoy@mindspring.com">jefoy@mindspring.com</a><br>Sent: Thursday, January 22, 2009 8:59 AM<br>To: AustinEV News Announcements and General Discussion; 'AustinEV News<br>Announcements and General Discussion'<br>
Subject: Re: [ausev] wireless charging<br><br>I remember seeing some of this technology being discussed last year<br>sometime. The concept is supposed to be for small devices, not large scale<br>power transfer. It is one more example of trading convenience for efficiency<br>
or for a solution to an otherwise difficult packaging problem (nanomachines,<br>biometric monitors, etc.) where placing a conventional battery would be<br>difficult.<br><br>If the efficiency can be raised to the 50%- 60% range I would think one<br>
practical application might me powered roadways. Imagine pulling your hybrid<br>or all electric onto a freeway and being able to inductively pull power from<br>a buried grid in the road surface. The perfect range extender, the power<br>
transferred could be monitor by RFID devices and you get billed at the end<br>of the month for what you used from the roadway grid (like the toll tag).<br><br>Jack<br><br>-----Original Message-----<br>>From: Steve Ross <<a href="mailto:sross1@austin.rr.com">sross1@austin.rr.com</a>><br>
>Sent: Jan 22, 2009 7:12 AM<br>>To: 'AustinEV News Announcements and General Discussion'<br><<a href="mailto:ausev@austinev.org">ausev@austinev.org</a>><br>>Subject: Re: [ausev] wireless charging<br>
><br>>If the resonant frequency transfer was a wide field of energy, than<br>anything<br>>with a resonant receiver would be able to tap into the energy contained in<br>>the filed. Would this allow you to charge a fleet of cars in the same<br>
>garage with one resonant generator? Since it is generating a constant<br>field<br>>of energy, would the generator be 'on' the entire time holding an energy<br>>field open? What type of energy would the generator require to hold the<br>
>field open? Would this field be the same as an MRI machine in the<br>hospital?<br>>Can magnetism really be that tightly 'tuned' so it does not affect anything<br>>else?<br>><br>>This could be a great way to charge up EV's just by parking them in the<br>
>garage and turning the field on. It could also charge onboard electronics<br>>like phones and IPods left in the car. Wow, what a concept, too kewl.<br>><br>>Steve Ross<br>><br>>-----Original Message-----<br>
>From: <a href="mailto:tomsmail@wtez.net">tomsmail@wtez.net</a> [mailto:<a href="mailto:tomsmail@wtez.net">tomsmail@wtez.net</a>]<br>>Sent: Wednesday, January 21, 2009 2:17 PM<br>>To: AustinEV News Announcements and General Discussion<br>
>Cc: <a href="mailto:ausev@austinev.org">ausev@austinev.org</a><br>>Subject: Re: [ausev] wireless charging<br>><br>>Who will volunteer to be the first person with a pacemaker (or laptop) to<br>>walk thru one of these B fields? ;-)<br>
><br>>Tom<br>><br>><br>>--- <a href="mailto:mkohler@austin.rr.com">mkohler@austin.rr.com</a> wrote:<br>><br>>From: "Marc Kohler" <<a href="mailto:mkohler@austin.rr.com">mkohler@austin.rr.com</a>><br>
>To: "'AustinEV News Announcements and General Discussion'"<br>><<a href="mailto:ausev@austinev.org">ausev@austinev.org</a>><br>>Subject: Re: [ausev] wireless charging<br>>Date: Wed, 21 Jan 2009 08:19:14 -0600<br>
><br>>Gil, that's why I mentioned the magnetic resonance version.<br>>It travels much farther than inductance and can only be "felt" when you<br>have<br>>a matching receiver tuned to that resonant frequency.<br>
>Marc<br>><br>>-----Original Message-----<br>>From: <a href="mailto:ausev-bounces@austinev.org">ausev-bounces@austinev.org</a> [mailto:<a href="mailto:ausev-bounces@austinev.org">ausev-bounces@austinev.org</a>] On<br>
>Behalf Of Gil Dawson<br>>Sent: Tuesday, January 20, 2009 6:31 PM<br>>To: AustinEV News Announcements and General Discussion<br>>Subject: Re: [ausev] wireless charging<br>><br>>> It looks like a mouse pad and can send power through the air, over<br>
>> a distance of up to a few inches. A powered coil inside that pad<br>>> creates a magnetic field, which as Faraday predicted, induces<br>>> current to flow through a small secondary coil that's built into<br>
>> any portable device, such as a flashlight, a phone, or a<br>>> BlackBerry. The electrical current that then flows in that<br>>> secondary coil charges the device's onboard rechargeable battery.<br>
>> (That iPhone in your pocket has yet to be outfitted with this tiny<br>>> coil, but, as we'll see, a number of companies are about to<br>>> introduce products that are.)<br>><br>>> We were able to transfer 60 watts with ~40% efficiency over<br>
>> distances in excess of 2 meters.<br>><br>>GM's EV1 and S-10E, and and Toyota's Rav4EVs all used Inductive<br>>Coupling to transfer up to 6 kw for charging. The paddle is held by<br>>a slot and springs rather closely to the coils, but there's still<br>
>perhaps 1/4 inch of play, so it is over some bit of distance.<br>><br>>Getting this technology to work over room-sized distances may be<br>>feasible soon, even within an acceptable efficiency. But can you<br>
>imagine what it will take to get OSHA to approve people in the<br>>workplace walking through a power transfer field?<br>><br>>--Gil<br>>_______________________________________________<br>>AusEV mailing list<br>
><a href="mailto:AusEV@austinev.org">AusEV@austinev.org</a><br>><a href="http://www.austinev.org/mailman/listinfo/ausev" target="_blank">http://www.austinev.org/mailman/listinfo/ausev</a><br>>No virus found in this incoming message.<br>
>Checked by AVG - <a href="http://www.avg.com/" target="_blank">http://www.avg.com</a><br>>Version: 8.0.176 / Virus Database: 270.10.10/1906 - Release Date: 1/21/2009<br>>7:07 AM<br>><br>>_______________________________________________<br>
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No virus found in this incoming message.<br>Checked by AVG - <a href="http://www.avg.com/" target="_blank">http://www.avg.com</a><br></div></div>Version: 8.0.176 / Virus Database: 270.10.10/1904 - Release Date: 1/20/2009<br>
7:49 AM<br>
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