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Is wireless power possible?

J

jfall

Diamond Member
It seems to me that the next step in wireless devices would be to actually use wireless power so you aren't required to use batteries etc. Is wireless power a possibility? Is there any companies making advances towards wireless power?
 
I highly doubt something like that would be healthy for us humans, standard electricity send through the air might be dangerous.
 
i've thought of this. early physics classes and what nt point to no, very difficult.
maybe quantum physics will let us though, it seems like having 1 thing exist at the same moment in 2 places and probably some wierd energy transfer thingies
 
It's proposed and even experimented w/ by Telsa 100 years ago. He even got pretty far w/ the experiments. You should read up about him.
 
Put a lightbulb in a microwave and turn it on. Don't worry, it won't arc or spark or blow up, the light bulb will just *turn on* 🙂

It's cool, but I've got no idea if there is technology advanced enough to send power wirelessly over the airwaves in a safe fashion.

Jason
 
Originally posted by: BrokenVisage
I highly doubt something like that would be healthy for us humans, standard electricity send through the air might be dangerous.
Click to expand...


what would the difference be between wireless power and a wireless signal such coming from hugh cell phone towers all over the place?
 
my landline cordless phone is recharged wireless-ly. it has no metal contact with the base. and I have been using it for 7 years
 
Originally posted by: jfall
Originally posted by: BrokenVisage
I highly doubt something like that would be healthy for us humans, standard electricity send through the air might be dangerous.
Click to expand...


what would the difference be between wireless power and a wireless signal such coming from hugh cell phone towers all over the place?
Click to expand...

frequency? wavelength? amplitude?
 
Yes wireless power is possible, and is already in use.

Lookup "Passive RFID Tags" as opposed to "active". Active tags have batteries, passive work off a magnetive field that the reader produces. And since passive tags are used as animal implants, no connection can be made - they're under the skin.
 
Originally posted by: jfall
Originally posted by: BrokenVisage
I highly doubt something like that would be healthy for us humans, standard electricity send through the air might be dangerous.
Click to expand...


what would the difference be between wireless power and a wireless signal such coming from hugh cell phone towers all over the place?
Click to expand...

Can the signal from a cell phone tower power anything?
 
Originally posted by: stan394
my landline cordless phone is recharged wireless-ly. it has no metal contact with the base. and I have been using it for 7 years
Click to expand...

It uses mutual inductance, which is great for a phone sitting on a base, but not particularly efficient for large applications 🙂
 
Originally posted by: stan394
my landline cordless phone is recharged wireless-ly. it has no metal contact with the base. and I have been using it for 7 years
Click to expand...
Err, that's inductance, which is quite a bit different. The base and phone have a wire coil in them in order to recharge the phone batteries. Sonicare toothbrushes use the same principle. Transformers use the same principle...the multiple windings in a transformer are not actually connected in any physical way.
 
Over very short distances it's been in use for quite some time. Over long distances, well, just watch out for the black helicopters.
 
Originally posted by: TankGuys
Originally posted by: stan394
my landline cordless phone is recharged wireless-ly. it has no metal contact with the base. and I have been using it for 7 years
Click to expand...

It uses mutual inductance, which is great for a phone sitting on a base, but not particularly efficient for large applications 🙂
Click to expand...

right it's just indictance, so it's probably not efficient. i jumped ahead of myself 😛
 
Originally posted by: TankGuys
Originally posted by: stan394
my landline cordless phone is recharged wireless-ly. it has no metal contact with the base. and I have been using it for 7 years
Click to expand...

It uses mutual inductance, which is great for a phone sitting on a base, but not particularly efficient for large applications 🙂
Click to expand...

But he didn't ask about the efficiency nor mention "large applications". He asked was it possible. And yes it is, and is in use. And efficiency anyway is subject to progress as technology advances.
 
i have a teeth cleaning device that uses this technology
the appliance is waterproof/totally contained, no contacts to charge the internal battery at all
the proxity of the batter charger thingy to the base when you place it in the base passes power "wirelessly" to the device to recharge the battery

i assume the primary of a transformer is in the base and the secondary of a transformer is in the device, but it could some other type of technology, i have not tore it apart to figure it out (yet).
 
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