Those who are fans Tesla will love this story form Stanford University on power transmission using Magnetic Resonance Coupling
http://revolution-green.com/2013/08/03/tesla-technology-breakthrough-magnetic-resonance-coupling/ (http://revolution-green.com/2013/08/03/tesla-technology-breakthrough-magnetic-resonance-coupling/)
Its been around for a while but this group are really pushing forward. I thinks there is a lot of useful information for experimenters
Kind Regards
Interesting relationship between the coil and the plate being at 90 deg. Kind of reminds me of a patch antanna.97 percent eff is pretty damn good. I wonder if you have several receiving vehicles if the loading on the transmitting side will increase? Or will it act like a passive group of receivers. Fox hole radios had no battery they used the signal for the power to operate the speaker. If you had a million of them within the transmit range of a station would it burn up the transmiter? I dont remember ever hearing of a broadcast station complaining too many people were tuned to their freq and causing excess power to be used as a result, not even in a city with millions of people. So if you trasnmit 5kw of power and reveivers can take in 5kw less 3% loss.How many receivers can function within effective range at the same time? Only one? Im sure it is said to be more complicated then that in the end other wise we could all series parellel 100watt receivers run off a 100watt transmitter in our homes and only pay for a 100watts transmitted while using a limitless amount of received power.
@doug 1
They are some good questions to ponder over. I guess the limiting factor will be what the receiver can take and so long as the load can cope it should be unlimited. I feel the best use is cordless charging at parking stations, no messy plus or chords.
This also opens up opportunities for electrics powered trams and buses extending their range.
Kind Regards
Mark
http://www.youtube.com/watch?v=9x2YfA9LU5s
http://www.youtube.com/watch?v=MhBgAAJUPsw
This is a very touchy subject for me, because I presented this wireless power transmission demonstration system well over a year ago.... then, Apple came out with their patent for wireless charging of devices, and now we see this Stanford paper and the "big deal" it is causing.
The innovation of using a metal plate at the correct orientation to improve the transfer efficiency is a good one, and works by the same principle as the improvement seen when multiple receivers are used in my system. If the plate is not oriented properly though, it produces more losses due to induced eddy currents.
TK
People take things all the time with out asking,sometimes they come as "friends"
hanging around looking helpful but at the same time they are a conduit to business interests harvesting off usefull bits and pieces ....
true scoundrels!!
thx
Chet
Quote from: ramset on August 03, 2013, 10:00:29 AM
TK
People take things all the time with out asking,sometimes they come as "friends"
hanging around looking helpful but at the same time they are a conduit to business interests harvesting off usefull bits and pieces ....
true scoundrels!!
thx
Chet
I'm not suggesting that Apple or the Stanford team "took" anything from me... I am sure that they are not even aware of my work, and the Apple patent _application_ was submitted before I started my inductive power transfer research anyhow. Granted after, but submitted before. I don't think it should have been patentable at all, actually, since it's Tesla's system in a new wrapper with semiconductors instead of spark gaps... but there it is.
My slight upset comes from the dismissal and disrespect I encountered when I attempted to present my system as something of possible commercial potential to some people I know, back in June of last year, before the announcement of Apple's patent and when the Stanford research reported above was still in its infancy and not yet public. So "you all" aren't alone in being ignored when you have a good idea... it happens to me all the time. I invented internet auctions back in October of 1993, in fact, but nobody believed it could go anywhere. Now... there is EBay.
TK
Quite true about ideas and the ultimate manifestation of a product!
that takes vision and usually the hands of more than one man ,and that takes Trust[sharing the idea].
Trust is a hard thing to come by...........
Have a good Day!
Chet
Lets hope the power dosnt go out half way through your long journey,when you need a recharge.
I realy cant see them digging up all the roads to implant them with coils and cable's. Seems the power systems over here already go into overload during summer months when power demands are high. So it would seem a system like this would require more coal and gas fired power stations to keep up with demands?.
My system plan uses the guardrails which are already in place along many freeways, no digging up required, and as my demonstrations show, the transmitting antenna isn't dangerous to handle or be around. At least not as dangerous as a cellphone! There isn't a shock hazard, at least. Also the transmission signal can be put onto the power lines that are also strung along most highways.
But Tinman brings up something that electric car fans don't always consider: the power still has to come from somewhere. Run the numbers: if half the travel miles in gasoline-powered cars were replaced with electrically-powered miles.... the demand on the electric grid would be huge, crippling in fact. So for electric cars to be viable for everyone, the power has to come from somewhere other than the existing grid.
Quote from: markdansie on August 02, 2013, 10:52:33 PM
Those who are fans Tesla will love this story form Stanford University on power transmission using Magnetic Resonance Coupling
http://revolution-green.com/2013/08/03/tesla-technology-breakthrough-magnetic-resonance-coupling/ (http://revolution-green.com/2013/08/03/tesla-technology-breakthrough-magnetic-resonance-coupling/)
Its been around for a while but this group are really pushing forward. I thinks there is a lot of useful information for experimenters
Kind Regards
Maybe they at Stanford University are a bit late?
Wireless Extension Cords http://www.thinkgeek.com/stuff/41/wec.shtml Only $35 but agree to no suing. Up to 300 ft range?"The WEC uses microwaves in the 7.2GHz range, so it won't interfere with wireless networks, Bluetooth components, etc. Now, all you need to do is adjust the antennae on the two units so they are aimed at each other. Turn everything on and you have the power! The distance the WEC units can broadcast differs from situation to situation (due to interference of such things as walls, power lines, and microwave ovens), but we've
beamed power over 300 feet! The future is wireless - and the WEC's are your ticket to the future"
Quote from: mikestocks2006 on August 04, 2013, 01:04:07 AM
snip...
Wireless Extension Cords
http://www.thinkgeek.com/stuff/41/wec.shtml (http://www.thinkgeek.com/stuff/41/wec.shtml)
snip...
LOL. I fell for it, hook, line and sinker. KneeDeep !
Quote from: hoptoad on August 04, 2013, 04:55:09 AM
LOL. I fell for it, hook, line and sinker. KneeDeep !
And me being me,went to see what you fell for lol.
Decided against makeing a purchase.
Hi TK
I really feel for you and hope in the future to try and change things for you and others for the better. I have made (not overunity invention) made other people very wealthy in other endeavors, but never myself. There are a lot of sharks out there and the more you help some people the more they turn on you.
more about that latter.
To the technology, it is one of many variations, I am happy they are working on it. As for where does the power come from for electric cars good arguments, except in some economies and countries where they are heading for 100% renewable power. Here in the Philippines they believe they will be 100% renewable in 10 years. In many other countries solar and wind are being ramped up rapidly. My home state in Australia is already 30% renewable that was achieved in just under a decade.
There si a strong possability of clean nuclear power with developments with thorium reactors as well. India predicts over 50% of there power will come from Thorium within 25 years.
PS I love the idea of using barriers, no road digging. I like the idea of this technology at parking stations, no cables.
Kind Regards
hoptoad, tinman
It does capture the imagination though. :)
Decided against purchase also...
However; few of these double packs were purchased few years back and still work fine:
"New technology Induction Charging base provides safe and reliable charging, with no contact prongs"
http://www.amazon.com/Eco-i-Lite-failure-Handheld-Nightlight-Silver/dp/B001TA52CG (http://www.amazon.com/Eco-i-Lite-failure-Handheld-Nightlight-Silver/dp/B001TA52CG)
available as single packs now.
http://www.homedepot.com/p/Eco-i-Lite-3-LED-Multi-Function-Power-Failure-Light-0565/203179696 (http://www.homedepot.com/p/Eco-i-Lite-3-LED-Multi-Function-Power-Failure-Light-0565/203179696)
The base simply sends energy through an inductive coupling to the handheld light, which stores the energy in the batteries.
http://www.capstoneindustries.com/index.php/the-capstone-difference/induction-charging-technology/ (http://www.capstoneindustries.com/index.php/the-capstone-difference/induction-charging-technology/)
Mark, TK
Great info/links
Thanks
Mike
Quote from: TinselKoala on August 03, 2013, 07:27:50 PM
But Tinman brings up something that electric car fans don't always consider: the power still has to come from somewhere. Run the numbers: if half the travel miles in gasoline-powered cars were replaced with electrically-powered miles.... the demand on the electric grid would be huge, crippling in fact. So for electric cars to be viable for everyone, the power has to come from somewhere other than the existing grid.
Tesla seems to have a good solution for that problem. ;) If all electric car companies followed their lead, ev's will be the future.
http://gigaom.com/2012/09/24/tesla-unveils-free-solar-powered-car-charging-stations-for-model-s-owners/
Mags