A technology for wireless transmission of energy has been created that can cover the volume of an entire room

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New technology, developed by Disney Research, allows energy to be transmitted wirelessly in a large space. This, in turn, will allow powering and recharging the batteries of electronic devices as easily as connecting them to wireless Wi-Fi networks, eliminating the need for people to use electrical wires and chargers.

The efficiency of the new technology, called quasistatic cavity resonance (QSCR), was demonstrated by the example of a specially built laboratory room measuring 5 by 5 meters. The measurements made showed that the magnetic field generated by the system evenly fills the entire volume of the room space, allowing you to simultaneously charge mobile phones, light bulbs and turn fans at any point.

The basis of the QSCR technology is electric currents circulating along the metallized walls, ceiling and floor of the room. These currents are the source of magnetic fields that permeate the entire room. Magnetic fields are induced in coils connected to electronic devices and tuned to the resonant frequency of the field, electric currents that charge batteries. And the electric component of the electromagnetic field, potentially dangerous for people, is suppressed using discrete capacitors included in the “oscillatory circuit” of the room.

“Our calculations show that in this way we can transfer up to 1.9 kW of energy, while still fitting within the limits imposed by the FEC,” says Matthew J. Chabalko (Matthew J. Chabalko), one of the researchers – “And this is enough power to simultaneously charge the batteries of 320 conventional smartphones.”

The demonstration “room” has walls, a ceiling and a floor made of aluminum sheets mounted on an aluminum frame. In the middle of the room there is a copper pillar that plays the role of the opposite pole of the oscillating circuit. A thin gap is made in the middle of the pillar, inside which capacitors and other components are installed that suppress the electrical component of the generated electromagnetic field.

“It is these capacitors that determine the resonant frequency of the system and suppress the electric fields,” explains Chabalco. “The frequency of the system is within one megahertz and all devices tuned to this frequency can receive energy regardless of their position in the room. The remaining magnetic field, due to its uniformity, does not interact with objects made of ordinary materials, which makes the system safe for everything around. “

Despite the fact that the demonstration room was built using special materials, this technology can be modernized in the future so that for its operation it will be enough only to paint the walls with special conductive paint or hang special panels on the walls. And to cover large rooms with the system, it will be possible to install several copper poles in them, which will ensure the uniformity of the generated magnetic field. Source: http://www.dailytechinfo.org