Disney scientists charges devices without wires by new developed technology

What we want is to walk into a room and have our iPhone 8 start charging automatically.

While there's been no shortage of attempts to incorporate wireless power transmission technology into our furniture, garages and living rooms, reality has not quite caught up with the futuristic ideals of untethered wireless freedom.

Once the system is fired up, the room is blanketed in a magnetic field and a receiving coil that's tuned to resonate at the same frequency powers the devices in the room. The next wave of research will look at downscaling the device to power a child's toy chest and to upscale the wave generator to power a warehouse.

"This new innovative method will make it possible for electrical power to become as ubiquitous as Wi-Fi", says Sample, adding that it could in turn "enable new applications for robots and other small mobile devices by eliminating the need to replace batteries and wires for charging". Firstly the room itself must be specially constructed from aluminium sheets, probably not the easiest to paint or hang wallpaper from. The system uses a technology called quasistatic cavity resonance (QSCR), and generates a magnetic field which spreads across the room.

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Though the wireless power delivery technology is still in its early stages, Disney researchers believe it can still be further improved to power conventional rooms.

Matthew J Chabalko from Disney Research said that our simulations show we can transmit 1.9 kilowatts of power while meeting federal safety guidelines. "Ultimately this unexplored form of wireless power offers a seamless charging experience when entering a QSCR enabled space as easily as data is transfer [sic] through the air", the authors write. For larger amounts, standard methods such as real-time power tracking can be used to ensure safe operation.

That 1900 watts of power we mentioned falls within federal guidelines for specific absorption rate (SAR), which is a measure of the energy a human body can absorb before it becomes risky. "This is equivalent to simultaneously charging 320 smart phones". That's why Disney Research hopes it can be the one to finally deliver free-roaming wireless charging to the masses.

We already have devices like smartphones, and smartwatches that can be charged without wires, but they need to be kept on some surface or plate.

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