Wireless Power Supplies!

[adsl1981]

Hello,

 

Im wondering if there is anyway of making a wireless power supply IE transmiting power without cables ? im doing it for a littele experiment.

 

Thanks you guys for all my help on the other question aswell !

[Klaynos]

Batteries.

[adsl1981]

Hi,

 

Well im looking for a more powerful way basically i want it to be 240V just a a power supply without the cable can it be done ?

 

Thanks

[insane_alien]

big batteries/solar panel + an altenator to give you 50Hz if you mean "beams" of energy then no, such a device does not exist as of yet.

[NMajik]

Although I don't know what you are doing, I'm going to guess the tesla coil approach (transformed down on the the recieving end to 240v) won't work?

[5614]

You could put loadsa of smaller power sources together (as I_A said).

 

As for "beams" well that does kinda exist as far as light "beams" from the sun and then using a solar panel to convert that into electrical energy, however you will get 240V out of those unless you had a lot and a lot of solar panels on a very bright day!

 

Or NMajik idea of making a spark cover the distance, not so practical as the spark could jump, a high voltage is needed before hand (although 240V through transformers would do) and obviously it wouldn't cover very long distances and there could be nothing but air between transmitter and receiver.

[padren]

I don't know if this is the sort of thing one could (or should) consider in a "little experiment" but for what its worth:

 

http://en.wikipedia.org/wiki/Microwave_power_transmission

 

http://en.wikipedia.org/wiki/Wireless_energy_transfer

[Klaynos]

Combustan engine powered generator...

[taylrl]

could you not get an incerdibly powerful magnet to induce a current in a coil from some distance??

[5614]

Theoertically yes you could.

[NMajik]

could you not get an incerdibly powerful magnet to induce a current in a coil from some distance??

 

Wouldn't you have to rotate either the coil or the magnet? Or am I completely wrong?

[gcol]

Two methods of cable-less power transmission being considered for future use are; induction (already used in small-scale use), And high energy microwave, where the example quoted was a solar power collecting satellite beaming the enegy to earth as microwaves.

[5614]

Wouldn't you have to rotate either the coil or the magnet? Or am I completely wrong?

Yeah that's true. One needs to be moving with respect to the other.

[gcol]

If the magnetic flux of the source was oscillating, then neither source nor drain would need to physically move. Static induction.

[YT2095]

Induction has been used for years as a way to "transmit" power, think of electric toothbrushes, a perfectly sealed unit with a base you drop it into, no wires or conectors involved there, or the rf ID tags.

[gcol]

So the only practical solution appears ro either lugging batteries around, or converting electrical energy into radiated energy, but dont stand in the way of the radiation, or you will fry your family jewels. Conversion efficiency, concentration and directional control would be the problems. Not exactly a little home science experiment. If it were easy, the power transmission companies would have it sewn up already.