cordless power

You have almost succeeded in describing a radio receiver.

There is no known way to "transmit" magnetism as in the magnetic field produced by a permanent magnet or DC electromagnet. The field, or lines of force extend only a relatively short distance as they "strive" to create a closed path between the poles. To produce electric power you must cut the lines of force with a conductor, as in a generator where wires and magnetic fields move in relation to one another, and as close as possible.

Electric power can be produced with a stationary arrangement of a magnet and conductor only if the magnetic field varies, in which case the conductor is again cutting lines of force as they move with the varying field. Transformers among other devices make use of this effect.

Electromagnetic radiation can and does transmit power over a distance as in radio waves, but the effective power that can be received is only a small fraction of what is transmitted unless it is "beamed" in a focused manner ...... nothing at all new here.

You obviously have something in mind but what that is, I have no idea, unless of course you forgot what magnetism is and allowed free reign to your imagination.

Greg

Free riegn ,free thought ,ideas thats how you get there sometimes .
The idea would be to utilize a seperate component of power generation and remotely send that to transmit power without wires .It strikes me as a very reasonable assumption maybe unrealistic .So was the idea of the Telephone ,Microwave ,Space travel , Nucular reactions they all seemed " free reign to your imagination " at one time .

The idea would be to utilize a seperate component of power generation and remotely send that to transmit power without wires.

Tesla kept his notebook in his head.

Therefore he left nothing behind for others to steal.

"Why can't magnetism be transmitted harmlessly to allow recievers to generate electric power in a remote location"

The simple answer is that the inverse square law kills the amount of power you can generate.

Any radiated energy reduces in strength to the inverse of the square of the distance. In other words double the distance from the source and you get only on quarter of the power.

You beat me to it, this time...

Thanks for that simple to understand fact of science .
I have researched other avenues of transmission it seems the use of radio frequency has more promise. I'll leave it to the big minds at MIT to figure it out but I thought it was an interesting subject to throw around the cr4 community .Maybe the obsticals are insurmountable but I'm an eternal optomist .

Hello traditional,

.... just another guy who wants to bomb us with electrosmog only in order to cultivate his convenience .....

We`ve just heard and seen in another discipline what happens when people think so - I mean our climate.

"traditional" means to conserve, also for example our health. Watch your name and think why you have chosen it !!

Regards uwe

Harsh words my friend obviously if there was danger it wouldn'nt be acceptable .

Think about it maybe you should throw away your cell phone ,computer ,microwave oven ,don't drive your car .All machines have some possibilities of being dangerous .Should we limit our thinking to only things that have been successfully done ,that are "safe".I'm sick of loosers like you crapping on free thought .So maybe if it isn't simple at first thought , should we just give up .If we listened to people like you we would still be bleeding people .Go back in your garage an rub some sticks together , maybe not , you could hurt yourself .

No, thats too simple - I fully agree with you that we can hardly abandon all those things (though I have no microvave, but all the others). But in my opinion generating power where it`s not needed and then transporting it to where its needed is "rubbing sticks" with old concepts and all the disadvantages like transport-cost and -equipment, radiation, bad efficiency and so on. Why not better developing small (micro? nano?) power-units and using them locally ?

Best regards from neander valley
uwe

Well, you can transmitt electromagnetic waves, as in a radio transmission. It's harmless, unless frecuency is too high (as an example a microwave of 1KW makes things go warm, because of high frecuency; an FM transmitter of 10KW makes nothing to people because of low frecuency, that means photons of lesser energy that can't interact with people's atoms...).

There are several examples of transmission of power over the air... I've heard that there are wireless cellphone chargers (of course I think phone have to be close to the charger to avoid losing energy) and the first AM radio receivers (prior to silicon diode) where powered with the signal they were receiving.

Hello

I read once about a technology using infrared rays that would ionize air and the sending an electric discharge through this channel at a few meters. This was supposed to be ued as a electric gun.-

So maybe if this works, electric energy could be transported by this mean?

Doesn't its original intended use tell you something about its safety when used around people?

Picture lightning in your living room.

And, it is not efficient at all either.

"I read once about a technology using infrared rays that would ionize air and the sending an electric discharge through this channel at a few meters. This was supposed to be ued as a electric gun."

This isn't a technique I would like to use on a large scale. The ozone that it would produce could be a considerable health hazard. Then again maybe we could use the ozone to fix the hole in the ozone layer that we caused with fluorocarbons.

I have thought of a similar idea-transmitting power over a shorter distance (about 6-12 meters) to power electric cars. Each car can have a meter box where you can load it with pre paid electricity. Along the highway there could be the transmitters of the electricity.... Problem is how to transmit and then recieve the power savely and effieciently also... I have heard of a farmer who had some high voltage power lines running across a section of his land who came up with the novel idea of placing very large coils right under the lines. The magnetic field created by these lines actually tapped enough power from the system to alert the company to send a helicopter to find where the loss of power was. They found a very suspicious hey stack directly under the lines somewhere and by closer inspection found the coils... I think the farmer got away with a warning and had to remove his device...

Great idea on suppling electric cars .Simply install a transponder to meter electric usage , simular to devices being used in cars to collect tolls .Simply find away to transmit the power .It could be in the road but that would surely be a hazzard .Wouldn't it be ideal to be able to draw power from existing supply lines along the roads .The utilities would recieve their payment electronically . It may seem dangerous but I'm sure in some way it could be a reality .If not a fuel cell system may be more practicle , but it's interesting to imagine .I liked your farmer story .In my area a guy built a house under power lines but was recently denied an ocupation permit because florecent lights in his house spontainiously illuminated .He is currently in litigation .

RE: I liked your farmer story.

But have you heard the one about the farmer's daughter?

RE: Simply find away to transmit the power.

Oh yeh!

Sorry, I am going to have to tag this one as an urban myth. Air coupled transformers with a one turn primary aren't going to work very well with close coupling let alone the ninety feet height at which high voltage power lines are strung. Very possibly what happened was the power company had a right of way and he was told to get his haystack out of the right of way because it posed a safety hazard. Most of the fantasies about these types of things are based in a lack of hands-on experience with the technology combined with a lack of information in the applicable science. I'm all for thinking outside the box and innovation but thinking outside of reality is just dreaming. It seems that a big attraction to the idea of "wireless" power is the illusion of "free" power. That just isn't going to happen unless YOU are going to be the philanthropic individual that is going to foot the bill for the rest of us to tap into "free" power. It looks good when you imagine all that power floating around that you can just put up an antenna and grab but more true than the underlying physics is the universal truth that there is NO FREE LUNCH, unless of course, you're buying.

oomsarel:

"I have heard of a farmer who had some high voltage power lines running across a section of his land who came up with the novel idea of placing very large coils right under the lines. The magnetic field created by these lines actually tapped enough power from the system to alert the company to send a helicopter..."

The only thing that would bring a helicopter would be a short circuit or a ground fault. And as if that wacko idea of a coil would work. I can't believe how people believe these kinds of "tales", but they do ..... just visit CR4 for proof!

Greg

The guy who told me this story is an engineer and he heard it from some one that works in that company. I don't recall the details of exactly how the farmer did it but he did use some device of tapping power without touching the lines. Maybe the device was lifted higer and then covered with some hey... I will ask the guy who told me this story to get the facts for me and I will give an update called " Tapping power" OK??? If it is a myth then I probably started it now because I can't remember the details of the original story... I admit that I don't know enough about high voltage power lines, but I do know my friend that told me the story does know a lot...

Often what we must consider is there is often some seed of truth to many stories and then they get embellished. So here is my version of the story that seems plausible to me. The farmer is no engineer but he figures a coil of wire is something he can do. So he puts the coil under the line and runs a wire from it to his barn and discovers that if he hooks it to one end of a fluorescent lamp and perhaps grounds the other end that he can get the lamp to glow. There have been many stories and I have seen pictures (which don't necessarily constitute incontrovertible evidence by any means) of people holding lamps under 750kV or 1mV lines and getting them to light. I will buy that there could be enough static field to ionize the gas in these relatively high impedance lamps but not necessarily to full power. I used to charge myself up on a high voltage DC supply as a kid and carry a 4 foot fluorescent lamp in to flash it for my mother who was certain I would kill myself. I don't believe that the power company would detect a the few watts that would be required to do this since they are probably sending megawatts down the line and other nodes of leakage probably exceed the tiny amount of power that could be drawn using a (you better darn well hope) non-arcing means. So the assumption that they must have "detected" the power drain would have probably been based in an ignorance of the fact that they periodically inspect the right of way and simply saw the silly contraption and told him to cease and desist (before he got more enthusiastic and perhaps charcoaled himself). Oh, and perhaps a helicopter did go over before they told him to clear out but helicopters do fly overhead from time to time and maybe they were doing routine inspection or maybe it was the DEA checking to see if this wanna-be power steeling farmer or any of his neighbors were growing an illegal crop. Things happen, and then other things happen and that does not imply a necessary connection.