Wireless charging is a key to the future, something that the industry feels consumers would be more than happy to aquire. This being said, it should not be to long before it is available.
Wireless charging has become a common feature in high-end smartphones, but the technology is still in its infancy. Not only does it require the device to be within an inch or two of the emitter, the power output is not high enough to power anything indefinitely. So are your electronics doomed to always be tethered to the wall? Not if Chun Rim, professor of Nuclear & Quantum Engineering at Korea Advanced Institute of Science and Technology (KAIST) has anything to say about it. Rim and his team have developed an inductive wireless charging system than can beam power up to five meters away.
Like the inductive charging systems in Qi and PMA, the KAIST wireless power system relies on transmitter and receiver coils, but those standards have nowhere near the range or power demonstrate here. The team managed to get this astounding range out of its coils by developing a new mechanism called the Dipole Coil Resonant System (DCRS). This technology was designed specifically to solve the problems with MIT’s Coupled Magnetic Resonance System (CMRS) for wireless charging at a distance. CMRS was able to beam power up to 2.1 meters away when it was developed in 2007, but it was woefully complicated and inefficient.
The KAIST take on wireless power relies on a coil with two magnetic dipoles — a primary one to induce the magnetic field and a secondary one to receive the electric power. The design of these devices is considerably simpler than the older CMRS standard, consisting of compact ferrite core rods with conductive windings toward the center. We’re still talking about big prototype devices, though. The version being tested at KAIST is three meters long and 10 cm wide. It is definitely not going to be built into your phone any time soon.
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