Electricity with wires...

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Cavie

Cavie

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you will see that happen in your lifetime with the smaller stuff such as the phone chargers and such I believe. But it's doubtful you'll see large draw items before you die. I could be wrong.
 
mcclary's electrical

mcclary's electrical

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I've seen the full demo, and it's misleading. They're not sending electricity wirelessly, they're magnetizing a coil, that magnetizes an "area". The "other" coil in this "area", becomes magnetized and produces tiny amounts of electricity. IMO You will never see large amperage flows from this product. It would be extremely wasteful. And it's not wireless electricity, it's wireless magnetism, which has always been that way.
 
charlie

charlie

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This reminds me of training I had in the USAF. We had six weeks of electronic training using breadboard with resisters, capacitors, etc. The last few days, we had an overview of 'solid state' devices like diodes and transistors. We were told that they would never take the place of tubes and would never be able to handle real power.

Yep, you are correct, "You will never see large amperage flows from this product." :)
 
LarryFine

LarryFine

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They're describing an air-core transformer. Years ago, Popular Electronics magazine had a project for wireless headphones using a loop around the room as the primary, and a receiver with a loopstick antenna as the receiver. The headphones still required batteries.
 
K8MHZ

K8MHZ

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Tesla did it over a century ago.

It never caught on because of the inefficiency.

What is being developed that actually as a future is battery charging systems that use induction instead of wires for the connection. I predict that the upcoming proliferation of electric cars will create a huge demand for wireless charging.

The great thing about wireless charging is that once a standard for the coil in the charger is created, any battery can be charged with it because the coil for the other half of the transformer will be in the device and matched to the battery. The same charger will be able to charge 1.2, 3.6, 7.2, 14.4, etc. volt devices just by laying them on top of the charger.
 
Rick Christopherson

Rick Christopherson

Senior Member
Yes, I saw that story last night and I was disappointed with how they mislead the viewer. As Larry pointed out, this is nothing more than a loosely coupled, or air coupled transformer and is nothing new. It is also very inefficient. It is the same concept that powers up a proximity smartcard and other RFID devices too.

People complain about how much energy a wall-wart wastes. That would be nothing compared to this.
 
mcclary's electrical

mcclary's electrical

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VA
Charging cars is where this technology is heading. You pull your electric ride in your garage, juola!!,,,,there's a mat in the floor charging the battery. I can also see it leading to a device you lay in the top drawer of your dresser and plug it in. Now just lay your phones on top of the dresser to charge them without hooking up wires.
 
K8MHZ

K8MHZ

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Michigan. It's a beautiful peninsula, I've looked
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mcclary's electrical said:
Charging cars is where this technology is heading. You pull your electric ride in your garage, juola!!,,,,there's a mat in the floor charging the battery. I can also see it leading to a device you lay in the top drawer of your dresser and plug it in. Now just lay your phones on top of the dresser to charge them without hooking up wires.
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Indeed, and it will open up a whole new sub-trade....or trade if we (electricians) don't keep up with the technology.

I foresee that charging coils will be part of new construction in garages, driveways and parking lots, installed in the pavement like re-rod.
 
brian john

brian john

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Leesburg, VA
charlie said:
This reminds me of training I had in the USAF. We had six weeks of electronic training using breadboard with resisters, capacitors, etc. The last few days, we had an overview of 'solid state' devices like diodes and transistors. We were told that they would never take the place of tubes and would never be able to handle real power.

Yep, you are correct, "You will never see large amperage flows from this product." :)
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You have to be older that me?
 
Rick Christopherson

Rick Christopherson

Senior Member
K8MHZ said:
Indeed, and it will open up a whole new sub-trade....or trade if we (electricians) don't keep up with the technology.

I foresee that charging coils will be part of new construction in garages, driveways and parking lots, installed in the pavement like re-rod.
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And Popular Science predicted that we would be driving flying cars by now too. :grin: They're great concepts, but they rarely take into account the realities of life that hold them back.

A flying car is already technically viable and does exist, but with the inefficiencies of fuel consumption to both raise a car and propel it, it is not really going to "fly", so to speak.

The same is true for wireless power transfer. It is technically feasible to do right now, but the high cost of the wasted energy is going to preclude it from making progress for now, especially in high power applications like electric vehicles. It is a minor convenience with a major cost.
 
iwire

iwire

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Rick Christopherson said:
And Popular Science predicted that we would be driving flying cars by now too. :grin: They're great concepts, but they rarely take into account the realities of life that hold them back.

A flying car is already technically viable and does exist, but with the inefficiencies of fuel consumption to both raise a car and propel it, it is not really going to "fly", so to speak.

The same is true for wireless power transfer. It is technically feasible to do right now, but the high cost of the wasted energy is going to preclude it from making progress for now, especially in high power applications like electric vehicles. It is a minor convenience with a major cost.
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History is littered with very knowledgeable nay sayers, with great explanations of why something will never work.

A great many have been proven wrong. :)

Obviously given our current technology your points are dead on, but I will never limit myself to what may happen in the future.

Think of the hundreds of things in our daily lives that not that long ago would have been called 'witch craft' or 'magic'.

We landed on the moon :cool: ............ really ......... think about just how outlandish that would sound to someone in 1940.
 
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