[Novalug] Wireless power transfer achieved at 5-meter distance -- ScienceDaily

John Franklin franklin@elfie.org
Tue Apr 22 08:31:02 EDT 2014


That's an idea.  I was going to use triangles made from wooden chopsticks as they should stack well and provide a nice unit of measurement.

jf

On Apr 22, 2014, at 7:50 AM, pereira <ninorpereira@gmail.com> wrote:

> John,
> 
> by all means don't use spacers, use some ceramic like small stones from the
> yard (so you can support the pot in 3 points), or ceramic plates.
> 
> Nino
> 
> On 04/22/2014 12:25 AM, John Franklin wrote:
>> I've got an induction cooktop that works in a similar manner, except the "collector" is the ferrous pot and the water in it.  I'll have to play with putting some plastic spacers between the pot and the surface to see what kind of power drop I get.
>> 
>> From just lifting the pot off the eye, the amount of power transmitted to the pot does seem to drop pretty fast with distance.
>> 
>> jf
>> 
>> On Apr 21, 2014, at 11:49 AM, "Charles R. Head" <CharlesRHead@Netscape.Net> wrote:
>> 
>>> The article at the link below is the latest I've seen in a growing number trumpeting the coming age of wireless power transfer.  However, as the article states near it's end, the overall system power efficiency was  36.9% at 3 meters, 18.7% at 4 meters, and 9.2% at 5 meters.  That amount of power loss seems to me to be obscene, especially when you consider rapidly growing demands for power, dwindling energy resources and global warming.
>>> 
>>> I guess if the technology were applied only to recharging smartphones, the total power used might still be a miniscule fraction of the total energy usage of the planet and thus a no-never-mind.  Unfortunately, I've also seen articles advocating use of this technology to recharge electric cars and to power lighting.
>>> 
>>> Am I missing something or is this really as insane as it seems?
>>> 
>>> Charlie Head
>>> 
>>> 
>>> http://www.sciencedaily.com/releases/2014/04/140417124509.htm 
>>> 
>>> 
>>> 
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>> -- 
>> John Franklin
>> franklin@elfie.org
>> 
>> 
>> 
>> 
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