Reviving this thread at the occasion of Sony announcing their own
wireless power system:
http://www.trustedreviews.com/peripherals/news/2009/10/02/Sony-Reveals-Efficient-Wireless-Power-Technology/p1
John, note the following excerpt:
Furthermore, even if there are metal objects located between
...ainly agree. (had accidentally hit the send button, sorry)
-- Forwarded message --
From: Michel Jullian michelj...@gmail.com
Date: 2009/10/6
Subject: Re: [Vo]:The coming of Wireless Power, A report on CNN
To: vortex-l@eskimo.com
Reviving this thread at the occasion of Sony
William Beaty wrote:
On the other hand, if the phenomenon produced a natural amplifer and
not an ionospheric oscillator, then N. Tesla's World System might
supply far more energy than was being broadcast by his transmitters.
Not likely, but wouldn't that be great?!? You gotta love Tesla!
-
John,
OK so you want actual numbers regarding battery savings. Let's study
the case of the latest version (3G-S, July 2009) of the popular iPhone
smartphone:
http://www.apple.com/batteries/iphone.html :
A properly maintained iPhone battery is designed to retain up to 80%
of its original capacity
That's not how inductive or resonant transfer works.
Imagine a magnet rotating in space end over end, does it's field radiate
like rays of light? No.
Does it lose (radiate) much energy? No.
However it is possible to tap energy from it if close enough to it.
Now as for the ring of metal, did you
On Sun, 20 Sep 2009 07:56:11 +1000, you wrote:
In reply to John Fields's message of Sat, 19 Sep 2009 10:08:09 -0500:
Hi,
[snip]
On Sat, 19 Sep 2009 14:18:54 +0200, you wrote:
John, sorry for the late answer.
Unwanted induction heating on rings necklaces etc: they say it doesn't
happen because
Further, let's say that the receiver's coil comprises 100 turns of
copper wire.^^
---
Oops...transmitter's
On Sun, 20 Sep 2009, mix...@bigpond.com wrote:
BTW while we are on the topic, consider that it might be possible to use the
lower Van Allen belt as the transmitter, allowing reception of free power.
(The belt itself is of course powered by the solar wind).
There should be a point where the
On Sun, 20 Sep 2009, William Beaty wrote:
But that would be high-power RF which for some reason doesn't show up on
detectors built for that freq range.
On the other hand, if the phenomenon produced a natural amplifer and not an
ionospheric oscillator, then N. Tesla's World System might supply
On Sun, 20 Sep 2009 12:02:13 +0200, you wrote:
John,
OK so you want actual numbers regarding battery savings. Let's study
the case of the latest version (3G-S, July 2009) of the popular iPhone
smartphone:
http://www.apple.com/batteries/iphone.html :
A properly maintained iPhone battery is
On Sun, 20 Sep 2009 15:54:05 -0500, you wrote:
Since the wireless system is 50% efficient it'll eat 1.8kWh while
delivering 1.8kWh, while the wired system, being 90% efficient, will eat
only 0.2kWh.
At USD 0.1 per kWh, that's $1.80 for the wireless system, while only
$0.2 for the wired system.
In reply to William Beaty's message of Sun, 20 Sep 2009 11:08:24 -0700 (PDT):
Hi,
[snip]
On Sun, 20 Sep 2009, mix...@bigpond.com wrote:
BTW while we are on the topic, consider that it might be possible to use the
lower Van Allen belt as the transmitter, allowing reception of free power.
(The
John, sorry for the late answer.
Unwanted induction heating on rings necklaces etc: they say it doesn't
happen because you need very fine tuning to receive (see the TED video
I linked to, the guy walks happily through the power beam, same thing
for the original MIT research team photographed
On Sat, 19 Sep 2009 14:18:54 +0200, you wrote:
John, sorry for the late answer.
Unwanted induction heating on rings necklaces etc: they say it doesn't
happen because you need very fine tuning to receive (see the TED video
I linked to, the guy walks happily through the power beam, same thing
for
On Fri, 18 Sep 2009 13:52:11 +1000, you wrote:
In reply to John Fields's message of Tue, 15 Sep 2009 19:30:45 -0500:
Hi,
[snip]
Same problem with the electric airport cars; the distance between the
transmitters and receivers and the inverse square law, which our dear
Mother Nature invokes in
2009/9/19 John Fields jfie...@austininstruments.com:
I don't know the intensity of the fields shown in the videos, but my
concern would be that in a field of sufficient intensity to charge a
cell phone battery would also be capable of heating rings, necklaces,
and the like.
In the photo
On Sat, 19 Sep 2009 18:20:44 +0200, you wrote:
2009/9/19 John Fields jfie...@austininstruments.com:
I don't know the intensity of the fields shown in the videos, but my
concern would be that in a field of sufficient intensity to charge a
cell phone battery would also be capable of heating
In reply to John Fields's message of Sat, 19 Sep 2009 10:08:09 -0500:
Hi,
[snip]
On Sat, 19 Sep 2009 14:18:54 +0200, you wrote:
John, sorry for the late answer.
Unwanted induction heating on rings necklaces etc: they say it doesn't
happen because you need very fine tuning to receive (see the
Robin van Spaandonk wrote:
I suppose one every few blocks in an urban
area might work. Sort of like cell phone towers.
[snip]
You could put them at stoplights, where people stop anyway while
waiting for the
light to change.
In this scheme, the cars would have small, on-board batteries or
And trains. Meet SWIMO:
http://techon.nikkeibp.co.jp/english/NEWS_EN/20071120/142783/
Terry
On Fri, Sep 18, 2009 at 9:54 AM, Jed Rothwell jedrothw...@gmail.com wrote:
Some years ago there was a plan in Europe to operate electric buses with
quick charge capacitors. They would recharge at
Terry Blanton wrote:
And trains. Meet SWIMO:
http://techon.nikkeibp.co.jp/english/NEWS_EN/20071120/142783/
This is light rail with a 10 km range on batteries. This makes more
sense than buses with capacitors or fast-charge batteries. I think it
would be easier to put a recharger under a
Siemens has proposed exactly such a system. The infrastructure cost
is higher because the charging coils are embedded in the trackway.
Terry
On Fri, Sep 18, 2009 at 2:54 PM, Jed Rothwell jedrothw...@gmail.com wrote:
Terry Blanton wrote:
And trains. Meet SWIMO:
In reply to Jed Rothwell's message of Tue, 15 Sep 2009 10:45:43 -0400:
Hi,
[snip]
I suppose one every few blocks in an urban
area might work. Sort of like cell phone towers.
[snip]
You could put them at stoplights, where people stop anyway while waiting for the
light to change.
Regards,
Robin
In reply to John Fields's message of Tue, 15 Sep 2009 19:30:45 -0500:
Hi,
[snip]
Same problem with the electric airport cars; the distance between the
transmitters and receivers and the inverse square law, which our dear
Mother Nature invokes in order to keep us from blowing up the universe,
Indeed cell phone batteries will still be needed, but with
sufficiently ubiquitous witricity they will live much longer because
they will be more or less permanently on charge, even when in your
pocket: this lengthens considerably a cell phone's life, as it lowers
the number of cycles in a given
On Wed, 16 Sep 2009 10:25:27 +0200, you wrote:
Indeed cell phone batteries will still be needed, but with
sufficiently ubiquitous witricity they will live much longer because
they will be more or less permanently on charge, even when in your
pocket:
---
For that to happen, the cell phone would
A more informative video on the subject of witricity here:
http://www.ted.com/talks/eric_giler_demos_wireless_electricity.html
Transfer efficiency is not 5% like John suggested but more like 50%
and growing. I suspect the energy loss compared to traditional
solutions will be globally more than
On Tue, Sep 15, 2009 at 5:28 AM, Michel Jullian michelj...@gmail.com wrote:
Not sure about electric cars though, unless the efficiency can be
significantly improved, which I guess can be done by bringing the
coils closer together (either the coil in the car or that in the floor
could be
The efficiency I was referring to was for a pair of untuned loops
loosely coupled, but even at 50% for a more closely coupled resonant
system, half the power out of the transmitter would be lost before it
got to the load.
And, no matter how efficient the system can be made to be, it can never
be
These people claim they can improve over direct connection charging:
http://www.wipower.com/
Terry
On Tue, Sep 15, 2009 at 9:37 AM, John Fields
jfie...@austininstruments.com wrote:
The efficiency I was referring to was for a pair of untuned loops
loosely coupled, but even at 50% for a more
John Fields wrote:
As far as electric vehicles goes, I think the idea of a non-plug-in
charger is pure insanity.
I think so too, but an intriguing idea would be electric vehicles
without pantographs, on roads equipped with wireless chargers under
the surface. This would not be a viable
On Tue, Sep 15, 2009 at 1:33 PM, John Fields
jfie...@austininstruments.com wrote:
On Tue, 15 Sep 2009 10:30:56 -0400, you wrote:
These people claim they can improve over direct connection charging:
http://www.wipower.com/
---
I have trouble following a long thread once it starts getting
On Tue, 15 Sep 2009 15:22:06 -0400, you wrote:
On Tue, Sep 15, 2009 at 1:33 PM, John Fields
jfie...@austininstruments.com wrote:
On Tue, 15 Sep 2009 10:30:56 -0400, you wrote:
These people claim they can improve over direct connection charging:
http://www.wipower.com/
---
I have trouble
On Tue, 15 Sep 2009 10:45:43 -0400, you wrote:
John Fields wrote:
As far as electric vehicles goes, I think the idea of a non-plug-in
charger is pure insanity.
I think so too, but an intriguing idea would be electric vehicles
without pantographs, on roads equipped with wireless chargers under
Yet another report on the coming of Wireless power:
http://www.cnn.com/video/#/video/tech/2009/09/13/electricity.without.plugs.c
nn
http://tinyurl.com/rbrpk9
While I love the idea primarily for its convenience I harbor the suspicion
that we are about to unleash the mother of all power vampires
I believe it to be an issue. Have you read Stephen King's _Cell_?
http://en.wikipedia.org/wiki/Cell_%28novel%29
Terry
On Mon, Sep 14, 2009 at 8:59 AM, OrionWorks - Steven Vincent Johnson
orionwo...@charter.net wrote:
Yet another report on the coming of Wireless power:
Yes, that's the main issue with the harebrained scheme.
How it's done now is that the AC mains are rectified and smoothed, and
then that DC is switched on and off at a high frequency into the primary
of a transformer.
That generates a well-contained magnetic field which builds up and
collapses
As John Fields says, this is a harebrained scheme.
My guess is that if the power is high enough to useful work, they
will eventually discover it can harm your health.
I suppose there are some narrow applications that would benefit from
this technology. Something where you need large numbers
The comical part of this is this was demonstrated by Tesla long, long ago in
'electrical magic' shows whch established him as a wizard. To Tesla's
credit, he recognized the advantages of high frequency and high power. He
was perhaps the first, or among the first, to build high power, high
On Mon, 14 Sep 2009 16:11:48 -0400, you wrote:
As John Fields says, this is a harebrained scheme.
My guess is that if the power is high enough to useful work, they
will eventually discover it can harm your health.
I suppose there are some narrow applications that would benefit from
this
40 matches
Mail list logo
