Is this possible?

[bitem2k]

Hi, is this possible, practical?
https://electronics.howstuffworks.com/wireless-power1.htm

If so, what would the circuit that drives it look like?

thanks very much.

 

[Nigel Goodwin]

It's not practical yet, and may never be? - although I wouldn't discount anything in the future.

 

[bitem2k]

Exactly How inpractical is it?

thnx

 

[Nigel Goodwin]

Exactly How inpractical is it?

It's been worked on for probably getting on 100 years now?, and no one has done it yet!.

 

[bitem2k]

Ah, i just re-read the article, I didnt notice the word theorized

thnx

 

[chemelec]

Ah, i just re-read the article, I didnt notice the word theorized

thnx

It Partly Depends on How Much Power you need to transfer and at What Distance?

But more than a few inches and Efficiency is still not very good.
Althought this is Somewhat Possible, its really Not Practical to pump 100 watts into a coil, only to recover 2 watts out.

Using Ferrites to Direct the magnetic lines of force and Resonant Circuits, You can Improve this. BUT TO WHAT DEGREE is Still a Problem.

 

[Cabwood]

I'd be more worried about what was absorbing the other 98W.

 

[ThermalRunaway]

Free sterilisation??

Brian

 

[on1aag]

Wasted energy.

I already wrapped mine in aluminium foil.

on1aag.

 

[ThermalRunaway]

You could always make a faraday cage for it!!! hehe

 

[Nigel Goodwin]

I already wrapped mine in aluminium foil.

Have you ever seen what happens to aluminium foil in a microwave oven?

 

[bananasiong]

Have you ever seen what happens to aluminium foil in a microwave oven?

Last time I worked as a kitchen helper, a colleague of mine did this accidentally! I can see a little fire spark on the alluminium foil, luckily I turned it off immediately.

 

[Sceadwian]

Not much would have happend if you hadn't. It's not as dangerous as the manufactor would like you to think, at least for short periods of time (few seconds maybe 10's of seconds)

 

[Nigel Goodwin]

It's not as dangerous as the manufactor would like you to think

It would be if you were using it for 'protection'

 

[Blueteeth]

I believe a Mr Nikolai tesla demonstrated this, although the stories/evidence has been completely distorted by the frindge science community, so no-one really knows just how 'true' it is. I have seen well documented experiments from the 80's transmitting 500mW over 30 feet usiong small resonant coils with surprising efficiency. Same principles as those MIT guys, the idea of using resonance is nothing new, it hasn't changed in years, just being taken more seriously now...still I do'nt think they'll be any major advances any time soon.

Blueteeth

 

[Hero999]

There's more about this sort of thing here:
http://amasci.com/tesla/tesceive.html

The problem is you need to be within the H-field (about 1/4 wavelength) to recieve a decent amount of energy. Your two coils need to be behaving like a transformer. This is becomes more impractical as the distances increases.

 

[3v0]

From memory:
Some locals in Colorado Springs claim that Tesla transmitted power from Colorado Springs to a light atop Castle Rock a distance of about 40 miles. After he finished his work in Colorado he started construction of a power transmitter tower in New York but it was never finished. It is said that Tesla wanted to give away the power and charge for the appliances. The money types wanted to sell the power.

See THE WIRELESS TRANSMISSION OF ELECTRICAL ENERGY and many other articles on the web.

 

[Sceadwian]

I'd love to see science to back it up.

 

[3v0]

I'd love to see science to back it up.

You me and most everyone else.