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Wireless Power? Answered

OK so recently I have noticed that almost any sort of power can be converted into a different type, sorta. Anyways, it takes power to create radio waves or any wireless wave. Would it be possible to just send out plain radio waves and get something to pick them up and convert them into usable power? Now I know the farther you were from the source, the weaker the power would get, so you might have too send out a fair voltage signal to get some good range. Also, would it interrupt any electronics in range or anything like that? I was just thinking about this and wondering if it is even possible to get actual wireless power around your house or something without using batteries or interrupting anything in your house. Thanks.



8 years ago

Correct Tesla worked with wireless power in the early 1900's. He really only used AC where as Edison was doing the same with DC. Tesla was leaps and bounds ahead of Edison actually. Tesla invented the first fluorescent light bulbs which the worlds fair used instead of Edisons terrible incandescent lights - they were terribly made and super ineffecient!

Anyways both were capable of powering devices of significant size wirelessly. Some myth surrounds Tesla and the government. Do some research into his work and you will see he was a brilliant man that was not quite accepted by Europe and then America. The movie the illiusionist shows a little bit of what he was doing in Colorado. The town he was in allowed him to perform his experients and supposedly he supplied them with power for free???

Yes. It is very much possible to power significantly sized devices wirelessly. My theory is that they could not control(tax) who was using the wireless power. Now with encoding I think they may blow the dust off the old work and try to start beaming out some energy beams. Are you going to be able to power something large ... probably not but it is possible. I guess that was my 2 cents.

Good Luck! Hopefully you will invent something new and everybody can cut their power cords. Good luck and have fun! Power Kills!


Thank for your detailed answer. I like how you and a couple other people include a little bit of history in your answers which I always love. Yes so it is looking like it might come to be but not until we work out the kinks.

Yes. Although in reality, it's more of an academic pursuit at this juncture for anything requiring more than tiny amounts of power. In other words, don't expect to power a drill or dishwasher. Any time varying electromagnetic wave can be converted, but conversion efficiencies are at present quite low.

Yeah I was expecting something like this. Would it still be enough to power small things though? What would you say is the most power it could transfer?

Oh, it can transfer large amounts of power, just not practically for most of us outside a laboratory setting. And although Tesla did quite a bit of work on wireless power transmission way back in the early 1900s, wireless power is considered an "emerging" technological front in industrial areas, for sensor powering, RFID, etc. very small wireless transmitters, micropower amps, etc. (An example of the power one can transmit can be seen in the somehwat classic light a flourescent bulb near a High-voltage line...but practical? practical means high conversion efficiency, low cost...) Practically? It all depends on the source and how much cash you want to throw at it but I'd say a few tens of microamps at unknown voltage.

Take a look at what's out there for "Tesla wireless power" by doing a net search.

Of course, there are things like inductive charging pads for cells phones, but I wouldn't really classify near-range (a few inches or less) to be wireless power transfer in the sense I believe you meant it, which I *believe you meant more like the way we now use wifi or bluetooth.

Clearly, since microwave transmission is on the edge of reality (if that solar harvester that's supposed to beam power from orbital arrays down to ?Nevada? "New Mexico? ?California?actually gets built, a sizeable amount of power can be transferred, but again...for you or me in our houses?  That's a long way away imo.

Ok. Thank you very much for all the details. They were really helpful. I was just looking at my router the other day and wondering if you could up the voltages and do a little converting on the wireless receivers. I guess it will just remain a dream until further notice.

Ok Thank you. I'm looking at these as I type. And by the way, why is your account name andy while your name is Drew? Just wondering.

Some folks at MIT were experimenting with highly resonant circuits which they thought might eventually be able to power small electronics anywhere within a single room. By "small", I think they meant enough to power a palmtop but not a laptop (though it might be enough to charge a laptop, slowly). But that's cutting-edge.

Generally:  At legal levels of radiation, you're going to get enough power to run a few low-power chips within a few feet. That's how RFID circuits work.