A system that can deliver power to devices without the need for wires has been shown off at a hi-tech conference.
The technique exploits simple physics and can be used to charge a range of electronic devices over many metres.
Eric Giler, chief executive of US firm Witricity, showed mobile phones and televisions charging wirelessly at the TED Global conference in Oxford.
He said the system could replace the miles of expensive power cables and billions of disposable batteries.
“There is something like 40 billion disposable batteries built every year for power that, generally speaking, is used within a few inches or feet of where there is very inexpensive power,” he said.
Trillions of dollars, he said, had also been invested building an infrastructure of wires “to get power from where it is created to where it is used.”
“We love this stuff [electricity] so much,” he said.
Mr Giler showed off a Google G1 phone and an Apple iPhone that could be charged using the system.
Witricity, he said, had managed to pack all the necessary components into the body of the G1 phone, but Apple had made that process slightly harder.
“They don’t make it easy at Apple to get inside their phones so we put a little sleeve on the back,” he said.
He also showed off a commercially available television using the system.
“Imagine you get one of these things and you want to hang it on the wall,” he said. “Think about it, you don’t want those ugly cords hanging down.”
The system is based on work by physicist Marin Soljacic at the Massachusetts Institute of Technology (MIT).
It exploits “resonance”, whereby energy transfer is markedly more efficient when a certain frequency is applied.
When two objects have the same resonant frequency, they exchange energy strongly without having an effect on other, surrounding objects.
For example, it is resonance that can cause a wine glass to explode when a singer hits exactly the right tone.
But instead of using acoustic resonance, Witricity’s approach exploits the resonance of low frequency electromagnetic waves.
Tesla developed wireless power 118 years ago. He thought of beaming power all over the world like radio waves. The problem was, the power companies could not regulate it.
Morgan stonewalled him and created a panic on Wall St. in 1907.
Millionaire John Jacob Astor, Tesla’s close friend and financier, died on the Titanic in 1912. – reformation
According to the writer of the Tesla page here, a few powerful men are responsible for our use of polluting gasoline as opposed to clean electricity over the last 100 years.
With the discovery of electricity, everybody expected that all cars would be electric and run on rechargeable batteries. Tesla had gone one better and actually produced a working automobile that ran on electricity taken from the surrounding ether like an antenna picks up radio waves. This would revolutionize travel just like his AC induction motor had revolutionized the industrial world.
The 3 stooges Morgan, Rockefeller, and Ford had to sabotage his idea at all costs….No air polluting gasoline engine meant no oil monopoly for Rockefeller and the Standard Oil Company. No oil monopoly meant no excuse for Rockefeller to own the U.S. government, and no excuse to be involved in foreign countries . . . especially those surrounding Russia.