How Can Wireless Power Revolutionize Charging for Electronics?

[russ_watters]

Your best bet would probably be a parabolic transmitter and receiver for microwaves, but be aware that you'd heat up anything in the beam's path. And this simply cannot be done omnidirectionally. Plus, the components would be pretty big - bigger than the laptop. I just don't think it's a feasible idea at all.

Sorry.

 

[Don J]

I will appreciate if some body send me a link to MS or PhD thesis regarding this topic.

http://au.geocities.com/psyberplasmic/ccS1-4.html

Nikola Tesla. had discovered a process which could transmit almost unlimited amounts of electrical energy to any place on Earth with negligible losses. He had managed to estimate the resonant frequency of the Earth-to-ionospheric cavity at 150KC. It was a good guess; but one which has later proved not as efficient as possible because the cavity resonance changes from moment to moment - depending on solar wind densities and sunspot activity.

The United States has a very low-frequency transmitter located at the South Pole. It is similar to Tesla's process - except that it can be tuned to a frequency in the range of 7Hz. Even-numbered super harmonics of this frequency such as 14,336Hz (two to the eleventh power times 7Hz) have been used by both the U.S. Navy's VLF transmitter at Australia's Northwest Cape and the American Defence Advanced Research Project Agency's VLF facility at Pine Gap in the dead centre of Australia.

To tap the energy of such a broadcast requires the construction of a tunable Tesla coil which either operates at 14.3KHz or some even super harmonic of it. Of course, the higher the harmonic the coil is tuned to, the lower will be the power received in an inverse proportion to the increased frequency. The Testa coil's 'primary' would be the high-voltage, inner coil, in this instance, as the voltage will need to be stepped-down. The total length of the wire used in the primary should equal either the full or one quarter wavelength of the resonant harmonic chosen. The secondary should have the equivalent in ampere-turns. Placing a resistive load (like a filament light globe) across the secondary (which should be vertically movable to allow tuning of the inductive coupling of the coils) should indicate to the observer when the system is receiving by its glow. The main problem will be guessing the incoming voltage level. Depending on the field density, it could be as high at 500 Megavolts... which could produce problems... However, if the harmonic chosen is high enough, the effective voltage will drop considerably.

 

[russ_watters]

That a Tesla coil can be used to transmit electricity globally with negligible losses is quit simply a myth. I'll leave the link up for now, but it is just plain crackpottery and conspiracy theory.

 

[Don J]

Why not build the coil which is suppose to catch the energy transmitted by the alleged source.
This not seem so difficult to built.

To tap the energy of such a broadcast requires the construction of a tunable Tesla coil which either operates at 14.3KHz or some even super harmonic of it. Of course, the higher the harmonic the coil is tuned to, the lower will be the power received in an inverse proportion to the increased frequency. The Testa coil's 'primary' would be the high-voltage, inner coil, in this instance, as the voltage will need to be stepped-down. The total length of the wire used in the primary should equal either the full or one quarter wavelength of the resonant harmonic chosen. The secondary should have the equivalent in ampere-turns. Placing a resistive load (like a filament light globe) across the secondary (which should be vertically movable to allow tuning of the inductive coupling of the coils) should indicate to the observer when the system is receiving by its glow. The main problem will be guessing the incoming voltage level. Depending on the field density, it could be as high at 500 Megavolts... which could produce problems... However, if the harmonic chosen is high enough, the effective voltage will drop considerably.

Edited working link 1899 experiment images and description
http://www.pbs.org/tesla/ll/ll_colspr.html

Picture of the tower used during experiment
http://www.pbs.org/tesla/ll/images/td_tower02.jpg

Bulb glowing in ground
http://www.pbs.org/tesla/ll/images/cs_glight02.jpg
"Caption in Century Magazine, June 1900, reads: "The photograph shows three ordinary incandescent lamps lighted to full candle-power by currents induced in a local loop consisting of a single wire forming a square of fifty feet each side, which includes the lamps, and which is at a distance of one hundred feet from the primary circuit energized by the oscillator."

 

[Skyhunter]

[deleted] Yes, skyhunter, that is part of the conspiracy theory. This is the engineering forum and we don't discuss conspiracy theory here.

 

[Integral]

Are you reading the posts in this thread? Nobody has ever disagreed with the fact that you can broadcast power. There is no doubt about that, and no need to bring in Nicola Tesla as the forlorn forgotten genius. The method is simply inefficient, you must broadcast orders of magnitude more power then is received by any single antenna. The system is wasteful and is this day and age it is ludicrous to even consider.

 

[hitssquad]

Reflection of broadcast power for improved efficiency

Nobody has ever disagreed with the fact that you can broadcast power. There is no doubt about that, and no need to bring in Nicola Tesla as the forlorn forgotten genius. The method is simply inefficient

The afforementioned microwave-oven utilizes broadcast power. Microwave ovens are notoriously efficient...
home.howstuffworks.com/microwave.htm

...thanks to their wave-reflector systems.
http://food.rediff.com/whirlpool/html/glossary/microwave_glossary.asp

Every microwave oven manufacturer has a wave reflector system, which is nothing but the cavity itself.

 

[Integral]

The afforementioned microwave-oven utilizes broadcast power. Microwave ovens are notoriously efficient...
home.howstuffworks.com/microwave.htm
...thanks to their wave-reflector systems.
http://food.rediff.com/whirlpool/html/glossary/microwave_glossary.asp

Have you read a single post in this thread?

 

[Hydrazine]

Use wind. blow a strong wind towards component that has fan attached to it and connected to magnet that spins and produces energy. Less harmful than microwaves, but got to deal with a lot of messy hair.

 

[russ_watters]

Hitssquad, (to let you know what Integral was getting at...), the concept of a microwave oven cannot be used for transmission of power for some fairly obvious reasons: You could certainly turn your living-room into a room-sized microwave oven, but consider the logic of sitting inside it to power the laptop computer on your lap...

Besides, I'm not sure a microwave really qualifies as a point-to-point transmission of power, since the receiver is inside the transmitting device.

 

[Don J]

Are you reading the posts in this thread? Nobody has ever disagreed with the fact that you can broadcast power. There is no doubt about that, and no need to bring in Nicola Tesla as the forlorn forgotten genius. The method is simply inefficient, you must broadcast orders of magnitude more power then is received by any single antenna. The system is wasteful and is this day and age it is ludicrous to even consider.

Well Tesla system have nothing in commun with radio transmission.
Check these recents tests.
http://jnaudin.free.fr/html/afep012.htm

Edited to add
The Magnifying Transmitter by Nikola Tesla :
http://jnaudin.free.fr/html/tmt.htm

Now about my presentation
the only test to verified if it exist actually a system operated for secret military purpose is to build the receiver system describe ie_"To tap the energy of such a broadcast requires the construction of a tunable Tesla coil which either operates at 14.3KHz or some even super harmonic of it."_
see full description on my previous post above.

 

[russ_watters]

Ok, we're done here.