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Wireless Power
Resonance to power gadgets?
(old news - 08:57AM Wednesday Nov 15 2006)
tags: wireless · alternatives
The BBC (via Slashdot) explores how physicists believe the use of "resonance" may be able to recharge and power devices wirelessly. "a simple copper antenna designed to have long-lived resonance could transfer energy to a laptop with its own antenna resonating at the same frequency," states the report. "The computer would be truly wireless."

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Forums » Wireless Power
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ycool

join:2001-12-04
Miami, FL

1 edit

great idea

as long as it doesn't give me cancer or a brain tumor!!

karlmarx

join:2006-09-18
iraq
·Fairpoint Communic..

Re: great idea

Of course it will give you cancer. Cancer is usually caused by an external agent (chemical, radiation, etc) acting on a healthy cell. This most definitely would cause cancer, as your body would be subject to radiation energy every time you turned on your PC.
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markofmayhem

join:2004-04-08
Pittsburgh, PA

Re: great idea

True, but, will it have a better chance in giving you cancer than:

The sun
your dog
a hamburger
lightning strikes 100 miles away
watching TV
typing this post
riding a bicycle
walking through an area served by more than 1 cell phone provider
touching a paper clip

PolarBear
The bear formerly known as aaron8301
Premium
join:2005-01-03
·CableOne

Re: great idea

said by markofmayhem See Profile :

True, but, will it have a better chance in giving you cancer than:

typing this post

Kudos, Markofmayhem.

Plain and simply: if you are staring at a CRT and using a wi-fi router while looking at your cell and cordless phone on your desk to view this thread, shut the hell up about radiation and tumors.

Sorry, didn't mean to be so rude, but I think y'alls got my point
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GOLFnSUN
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said by karlmarx See Profile :

This most definitely would cause cancer, as your body would be subject to radiation energy every time you turned on your PC.
And this opinion is based on what? Your non-existent medical degree?
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karlmarx

join:2006-09-18
iraq
·Fairpoint Communic..

Re: great idea

This 'opinion' is based on scientific FACTS.
»www.cancerhelp.org.uk/help/defau···age=8774

"Ionising radiation can change a cell’s DNA. If this happens, then that cell’s inbuilt instructions about how to live and grow are jumbled about. It is then possible for the cell to do something very different from what it's been programmed to do. For example, it may become cancerous and keep reproducing in an uncontrolled way. This could take years to happen but it still means that a cancer may eventually develop."
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GOLFnSUN
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·Sprint Mobile Broa..
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1 edit

Re: great idea

said by karlmarx See Profile :

This 'opinion' is based on scientific FACTS.
»www.cancerhelp.org.uk/help/defau···age=8774

"Ionising radiation can change a cell’s DNA. If this happens, then that cell’s inbuilt instructions about how to live and grow are jumbled about. It is then possible for the cell to do something very different from what it's been programmed to do. For example, it may become cancerous and keep reproducing in an uncontrolled way. This could take years to happen but it still means that a cancer may eventually develop."
Except the radiation in this device is non-ionizing radiation as discussed in the link you provided:
Non-ionising radiation

Non-ionising radiation has enough energy to move things around inside a cell but not enough to change cells chemically. The radiation from a microwave oven is non-ionising. Other examples include

* Ultraviolet rays from the sun or sunbeds
* Electromagnetic fields
* Radio waves
* Radiation waves given off from household electrical appliances, heaters, mobile phones with or without headsets and computers and their screens
--
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Anonymous_
Anonymous
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Re: great idea

said by GOLFnSUN See Profile :

said by karlmarx See Profile :

This 'opinion' is based on scientific FACTS.
»www.cancerhelp.org.uk/help/defau···age=8774

"Ionising radiation can change a cell’s DNA. If this happens, then that cell’s inbuilt instructions about how to live and grow are jumbled about. It is then possible for the cell to do something very different from what it's been programmed to do. For example, it may become cancerous and keep reproducing in an uncontrolled way. This could take years to happen but it still means that a cancer may eventually develop."
Except the radiation in this device is non-ionizing radiation as discussed in the link you provided:
Non-ionising radiation

Non-ionising radiation has enough energy to move things around inside a cell but not enough to change cells chemically. The radiation from a microwave oven is non-ionising. Other examples include

* Ultraviolet rays from the sun or sunbeds
* Electromagnetic fields
* Radio waves
* Radiation waves given off from household electrical appliances, heaters, mobile phones with or without headsets and computers and their screens
Radiation waves

not all computer screens are CRT
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sweintz
Premium
join:2002-03-01
Hamden, CT

said by karlmarx See Profile :

This 'opinion' is based on scientific FACTS.
»www.cancerhelp.org.uk/help/defau···age=8774

"Ionising radiation can change a cell’s DNA. If this happens, then that cell’s inbuilt instructions about how to live and grow are jumbled about. It is then possible for the cell to do something very different from what it's been programmed to do. For example, it may become cancerous and keep reproducing in an uncontrolled way. This could take years to happen but it still means that a cancer may eventually develop."
Based on misunderstanding of scientific facts. It's amazing when the discussion of cancer comes up, and how various types radiation cause it, how many people who claim to be in the know demonstrate that they have a COMPLETE and UTTER ignorance as to what is/is not IONIZING radiation. The article you quote clearly specifies "ionizing radiation", which the technology being discussed (prolly "radio wave" band) is not.

High velocity nuetrons = ionizing
uvc=ionizing (just slightly)
Gamma (high frequency=high enegry) = ionizing

Radiowaves ain't gonna be ionizing unless there is a HELL of a lot of wattage behind them.
bmn
? ? ?
Premium,ExMod 2003-06
join:2001-03-15
hiatus

said by GOLFnSUN See Profile :

said by karlmarx See Profile :

This most definitely would cause cancer, as your body would be subject to radiation energy every time you turned on your PC.
And this opinion is based on what? Your non-existent medical degree?
And your medical credentials are what ? Man, you both are a trip, watching you two trying to have your little mental dick measuring contests and both coming up short.
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dave
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said by GOLFnSUN See Profile :

said by karlmarx See Profile :

This most definitely would cause cancer, as your body would be subject to radiation energy every time you turned on your PC.
And this opinion is based on what? Your non-existent medical degree?
Based on the fact that your body is subject to radiation energy before you switch on your PC, I suspect.

(There may be an exception for people whose apartments are maintained at a steady zero Kelvin).

aztecnology
O Rly?
Premium
join:2003-02-12
Murrieta, CA
If this works, Tesla will be spinning in his grave...
biznatch11

join:2004-11-21
London, ON
a brain tumor is cancer

Kfedka
Premium
join:2005-05-06
Spokane, WA
Lol, that was a great laugh!

Fluker

join:2005-04-07
West Lafayette, IN

Wireless extension cords?

Sounds like an oxymoron to me haha

qdemn7
Smurf in My Loop
Premium
join:2003-09-16
Fort Worth, TX

Shades of Nikola Tesla

And his "broadcast power" aka "radiant energy". »www.twelvestar.com/Sourceworks/T···rgy.html
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Re: Shades of Nikola Tesla

said by qdemn7 See Profile :

And his "broadcast power" aka "radiant energy". »www.twelvestar.com/Sourceworks/T···rgy.html
That was the first thing I thought of. This should have been invented long ago.

Maxo
Your tax dollars at work.
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I wonder when the day will come that Tesla's inventions are old technology and not things to yet be employed.
ricep5
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Re: Shades of Nikola Tesla

First thing I thought of was Tesla as well. He was thinking of powering airships across the Atlantic, not necessarily for passing data.

See the details for patents #1,655,113 & 1,655,114 from 1928 .

He is reported to have had a patent filed just before his death of what physicists now describe simply as a particle weapon. With WWII on the front burner, he came up with a weapon even he called "most destructive" and would end all wars.

Anyone who wants to see a fictional characterization of Tesla should go see the movie "The Prestige" where David Bowie plays him up pretty well.

ib50MbSoon
Formerly TwoKDialup
Premium
join:2002-06-07
Coloma, MI

Perpetual motion?

Would a resonating dildo recharge itself?

garagerock
Premium
join:2002-06-14
Louisville, KY

Re: Perpetual motion?

hilarious

nekote

join:2000-12-16
Hopkinton, MA

Transformer w/5m air gap? Tesla? EV1 Induction Paddle?

Tesla was big on wanting to transmit electrical power through the air.

This thing has 2 coils, separated by a maximum of 5m, according to the article / illustration.

In essence, a tranformer, so to speak?

A "long range" version of the Induction Paddle used to recharge the battery on the EV1 car from residential AC?

For any significant amount of power, electrical device has to "sit on" (be almost in contact with - minimal gap) the "charger coil"?
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n8zrj



Re: Transformer w/5m air gap? Tesla? EV1 Induction Paddle?

said by nekote See Profile :

This thing has 2 coils, separated by a maximum of 5m, according to the article / illustration.

In essence, a tranformer, so to speak?

Tesla's apparatus is actually radio. This mechanism uses quantum tunnelling. No energy is radiated. It mysteriously appears at the receiving antenna if it is close enough, but too far for induction as in a transformer.

nekote

join:2000-12-16
Hopkinton, MA

Re: Transformer w/5m air gap? Tesla? EV1 Induction Paddle?

Thanks n8zrj.

Got any URL links that might further elucidate this little known "quantum tunnelling"?

This is just the sort of forum that would be intersted!

RR Conductor
RailRoadDude
Premium
join:2002-04-02
Redwood Valley, CA
·Comcast

They stole the idea from Grandpa Munster!

He invented it on "The Munsters", Wireless Electricity that is

joe mayo

@swbell.net

Re: They stole the idea from Grandpa Munster!

Yes, but he blew out every light in the park. I hope this works better than Grandpa's.

Boogeyman
Drive it like you stole it
Premium
join:2002-12-17
Huntsville, AL

Golobulus seeks to acquire the experimental Broadcast Energy Transmitter (BET) kept under G.I. Joe's guard, intending to use its power to accelerate the orbital ripening of his mutative spores, which will then shower the entire planet to devolve all humanity into thoughtless beasts, leaving only those protected within Cobra-La to survive unharmed. Only the heroic determination of G.I. Joe stands in their way.
And was later invented by GI Joe...

»en.wikipedia.org/wiki/G.I._Joe:_The_Movie
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dadkins
Can you do Blu?
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join:2003-09-26
Hercules, CA

A new take on this?

Charging Pad?

»www.newscientist.com/article.ns?id=dn6891
RayW
Premium
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Layton, UT
clubs:
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This does work

Many years ago I had an instructor who told us of a fellow engineer who lived near a broadcast station. He designed and wrapped an antenna fence around his house, connected it to a rectifier network, and had a lot of power. Of course, it messed up the beam pattern of the station, but there was nothing they could do.

Don't think I want to live that close to that much RF power.

However, back to the story.

You also have to remember that for any general purpose system you are still bound by the inverse square law of a radiated signal. I also wonder how the physics works to give the apparent directional signal shown down at the bottom of the BBC article? In any event, you are looking at a fairly powerful signal in the 6.4 MHz area to give enough power to run a laptop. Wonder how that will affect the RF usage around that frequency since it will have the potential to interfere at a long distance (and another big notch in BPL to avoid data loss due to interference?)?

And I like the line
"There are a number of other aspects that need to be addressed to ensure efficient conversion of power to a form useful to input to devices."
It would be nice if there is an unknown aspect of resonance physics that would make this work. Very little power consumption by the transmitter until the user(s) is/are within range, then only as much power is sent out as is required by the device(s). Broadcast power from my Sci-Fi books a reality.
--
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04875776
Rollin' up my dog ends
Premium
join:2006-11-14
Chicago, IL

Re: This does work

said by RayW See Profile :

Many years ago I had an instructor who told us of a fellow engineer who lived near a broadcast station. He designed and wrapped an antenna fence around his house, connected it to a rectifier network, and had a lot of power. Of course, it messed up the beam pattern of the station, but there was nothing they could do.
Your instructor's "friend" may have "messed up the beam pattern" if his "antenna fence" reradiated the signal it intercepted, but if it did then it was not rectifying enough of the RF to produce "a lot of power". The two are mutually exclusive...either it absorbed or reradiated the RF signal. If anything the instructor's "friend" managed to harness several hundred volts of RF at a relatively low current, maybe a couple of amps. Assuming 100% conversion efficiency, that's a few hundred watts, hardly "a lot of power". He would also have been on the receiving end of an expensive legal hassle if he intentionally disrupted a directional antenna pattern.

Nice urban legend-type tale though.

In order to "transmit" power with any efficiency at all you need to be inside the induction field of the transmitter. In order to accomplish that you have to set up a strong alternating magnetic field. Tesla tried to induce these fields in the ground. Unfortunately, even if the technology were viable from a technical perspective, it would be a disaster from a practical one, as it would interfere with just about every electrical device we use today.

This device relies on an induction field. They subside much faster than an electric field (the square of the square of the distance). In theory they should not produce interference except at the frequency they are running at, and for relatively short distances. However, any modification which interrupts the closed loop can result in a radiating condition and would cause massive interference.

"Resonance" is nothing new. Crystal radio sets rely on it.
RayW
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Re: This does work

Anything that can remove radiated power will also affect the pattern, and I have no clue as to efficiency. Urban Legend? Might be. But since my instructor had said it was someone he had worked with, I tend to believe it. Also note that this was back in the 70's, a lot of power back then is not very much today, and it may have been something as mundane as compared to a D cell, I do not know.

Granted I have never tried it, but then again, I am not about to build a house next to a broadcast antenna (and I hope never to have one built next me). And I do not know if I need to get near a MF, VHF, or UHF (different power levels allowed too) site to match what he supposedly did.
--
I am not lost, I find myself every time.
04875776
Rollin' up my dog ends
Premium
join:2006-11-14
Chicago, IL

Re: This does work

I work with this stuff every day. Big iron, 50 KW and more.

The amount of power you can remove from the electric field of an AM broadcast array is minuscule unless you are inside the induction field of the towers which is effectively gone at approximately five times the height. And even then you would have to be absurdly close to an energized tower (less than a half wavelength) with a vertically-polarized antenna of about the same height in order for there to be enough mutual coupling to induce sufficient power into the antenna to light up even a common incandescent bulb. Unless that power is being reradiated, there is no significant pattern distortion. You can't "remove" radiated power. It is either dissipated or retransmitted, and only the latter affects a pattern. The former may affect the overall efficiency of the antenna, but then again only if the offending object is in extreme proximity to a tower.

At VHF or UHF the wavelengths are so much shorter than MW that you would have to be suspended in front of the antenna in mid air for anything like your story to work at all.

I have seen a 100 watt "trouble light" left laying in a tower field light up when the transmitter was turned on but only if one end of the cord was touching a ground strap, and that was due to the RF currents flowing in the immediate vicinity of the tower.

This device appears to use an induction field.

n8zrj

This device does not work by induction. It uses quantum tunnelling. No induction or radiation is involved.

nekote

join:2000-12-16
Hopkinton, MA

Re: This does work

Got any URL links that might further elucidate this little known "quantum tunnelling"?

This is just the sort of forum that would be intersted!

JFitch
Premium
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Pineville, WV
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Re: This does work

»www.physicspost.com/articles.php···leId=173
bogey780

join:2004-03-19
Here

power loss

In Europe there's a push to abandon the Sleep function beauseof the power loss. I doubt this will take off there if it has any noticable loss.

Transmaster
Don't Blame Me I Voted For Bill and Opus

join:2001-06-20
Cheyenne, WY
·Qwest.net

Oh Hum

RF energy picked up by a resonate antenna rectified to a usable voltage and current buy a diode(s) and a voltage regulator big deal.

Of course we all know the real reason for such a system is 'nad control. This idea is being secretly backed by WAM (Women Against Men) just think of the evil which could be done with secret ED beams emanating from lap tops.

If this comes to pass I will be as rich as Bill Gates with my patented Morning Wood line aluminium boxer shorts.
--
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SLD
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Wireless Power

I've thought for awhile that wireless power could be a reality if we had invisible lasers pointed from "sockets" in the house to mini solar panels on the devices. The only problem is that power would be cut if an object passed between the laser "socket" and the device - each device would need backup battery or clear line-of-sight.

rf_engineer

join:2003-08-04
USA

Re: Wireless Power

said by SLD See Profile :

I've thought for awhile that wireless power could be a reality if we had invisible lasers pointed from "sockets" in the house to mini solar panels on the devices. The only problem is that power would be cut if an object passed between the laser "socket" and the device - each device would need backup battery or clear line-of-sight.
There's another small problem. Any laser (visible or invisible) with sufficient energy to power a device would also have the power to burn flesh and blind people and animals.

SLD
Premium
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Re: Wireless Power

It's just concentrated light. So if the solar panel had this concentrated light pointed at it, it could be far more efficient than when collecting ambient light. I don't think the laser or infrared source would have to be powerful, just a thick beam.

rf_engineer

join:2003-08-04
USA

Re: Wireless Power

said by SLD See Profile :

It's just concentrated light. So if the solar panel had this concentrated light pointed at it, it could be far more efficient than when collecting ambient light. I don't think the laser or infrared source would have to be powerful, just a thick beam.
Concentrated light or not, "thick" or "thin", the light source is going to have to carry enough energy to power the device and also overcome the inefficiency of the photovoltaic device. You can't get more power out of a system than you put into it. And a solar cell isn't going to be more efficient collecting ambient light versus a laser; the efficiency remains the same (given the same wavelength of light), there would just be more energy to collect with a laser.

If you wanted to power a 5 watt device using your system, using a photovoltaic device with a very optimistic 30% efficiency, you would need to have at least a 16.7 watt laser. There would probably be other losses you'd need to account for, such as diffraction. A run-of-the-mill laser pointer runs about 1 or 2 mW (that's milliwatts, not watts). A few milliwatts is hazardous to eyesight. Cutting lasers start at about 100 watts.

Skilos

join:2000-08-19
Astoria, NY

startrek

You know what this means, add this idea to a tiny bluetooth, or 3g mobile device that is allways connected to a network and a speaker phone feature and you have your self a Startrek communicator that you wear on you chest.

rsa0

join:2003-01-25
Birmingham, AL

Al Gore

I bet Al is going to show up and tell everyone that he invented it !

justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL

Wireless Extension Cords

ThinkGeek already is selling this technology!

»www.thinkgeek.com/stuff/41/wec.shtml

--justbits

n8zrj



This really is something new

This technology does not use radiation or induction. It uses quantum tunnelling. When the receiver is moved close enough, energy mysteriously disappears from the transmitter and reappears at the receiver. Point to point, no inverse-square loss. The mechanism for tunnelling is not understood, but has been used since the late 1950's in solid state devices. That technology involves electrons, who's tunneling distance is a few atoms. Low energy photons (6 MHz) can tunnel longer distances. This seems counter-intuitive that lower energy particles can tunnel farther, but so is the notion of tunneling.

nekote

join:2000-12-16
Hopkinton, MA

Re: This really is something new

I would like a chance to learn more about this "quantum tunnelling".

Probably many more who visit here.

Got any URLs to more info?

TYIA

nixen
Rockin' the Boxen
Premium
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Alexandria, VA

Reminds Me of a Movie...

»www.imdb.com/title/tt0089869/



-tom
mdmathis6

join:2001-10-15
Midlothian, VA

hmmmm

If resonance could be used to recharge devices, then tuned resonance devices could be used to power space craft by means resonators that tune to the specific frequencies of cosmic radiation or even hydrogen band background radiation. There is literally energy anywhere in the universe...scale your resonators large enough and/or make them tunable to take advantage of shorter distance EM sources, say the sun and Earth's energy needs are solved, even with-out direct sunlight...

Archimedes, had he been alive today, might have cried..."Give me an inductance resonator large enough, and I shall power the Earth!"

This resonance generator sounds suspiciously how UFO's are supposed to operate as they float over power lines and then there is a power outage.

An open loop type resonator might even power craft faster than light as theoretically, the whole of a universe's energy might be available through a resonating device that acts pseudo infinitely...ie it is impossible in our space for objects to travel at light speed as mass(and the gravitational pull of that mass) becomes infinite and the energy to drive it also becomes infinite...but a open loop resonator, instead of going into overload, might have its ongoing collected energy constantly redirected into driving the ship half in and out of our universe..."warping" if you will!

Yeah I know I'm bloviating...but I think we need to look at resonance energy devices more carefully...I think the technology is only at its infancy!

Yowzaaah
Ours Go To Eleven

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DamnFlat, OH
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Tesla did a proof of concept on this already

If memory serves he was able to do it on a small scale in Colorado with a power company there and then got East Coast Money to fund a larger more ambitious project on Long Island (?). He ran out of money before it was working and had a nervous breakdown.

As I recall there was as serious and unresolved problem with the resonance power concept that would tend to make it commercially DOA if not addressed. Static. It seems that the houses participating were experiencing static shocks left and right as well as a "hairs on your arms and the back of your neck standing on end" feeling. Not the kind of thing the general public will put up with for long.

True story: Ever since I had the misfortune of owning a Chevy Cavalier with a mysterious grounding problem, I hate getting static shocks with a passion. EVERY SINGLE time I got out of the car after turning it off I would get a small but painful static shock. Unable to get to the bottom of it I sold the car before it even had 50K on it.
--
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Bumpin1ohm
Bumpin1ohm
Premium
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Aurora, CO
clubs:

Re: Tesla did a proof of concept on this already

touch metal as your getting out, problem solved. nothing to do with grounding as there is no ground until you touch metal...
--
Loud and Clear

nekote

join:2000-12-16
Hopkinton, MA

non-quantum tunneling explanation in MIT TechReview

Charging Batteries without Wires
New MIT research reveals a way to send wireless energy to mobile phones and laptops.

»www.technologyreview.com/InfoTech/17791/

low end RF ~4 to 10 MHz
resonate (receiving) power circuit
"Ideally", 50% as efficient as direct connect to AC outlet.
--
Government is like fire - a dangerous servant and a fearful master - George Washington

Democracy is the worst form of government, except for all other forms of government. - Winston Churchill

tr6scott

join:2002-03-23
Oxford, MI
·AT&T Midwest

Re: non-quantum tunneling explanation in MIT TechReview

Kick it up to 20kHz, and it gets to 90%... We use this stuff to move cars around auto plants... Just need to start buildin laptops with the pickups, and run the track supply down the wall.

Of course you better not use any ferous metals around or they will burn the place up.

It might have some drawbacks, if you have a pacemaker, it is not so good either.

»www.wampfler.com/INDEX.asp?lang=···7&PID=67



Principle of operation IPT®Rail

IPT® is a contactless power transfer system that allows electrical energy to be supplied to mobile consumers without any electrical or mechanical contact. Each system combines two parts, primary and secondary which are magnetically coupled, similar to a conventional transformer. The primary consists of a track power supply and track cable along the path of electrification. The pickups and pickup regulators form the secondary. Unlike a conventional transformer, where primary and secondary are tightly coupled, IPT® is a loosely coupled system. Power may be transferred across large air gaps of up to several centimetres, because of the high operating frequency of 10 kHz to 25 kHz.
There are two general applications, IPT®-Rail for continous feeding and IPT®-Charge for battery charging. IPT®-Charge integrates a smart charging system already in the pickup, so that no extra components are required to charge batteries.

--
The sooner we get behind schedule, the more time we have to catch up.
Forums » Wireless Power


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