The Korean system has set a new record fo sending power through the air - and is even able to power a TV.
It could mean the end of the daily hunt for power cables.
Korean researchers have unveiled an experimental wireless recharging system that could top up the mobile of everyone in the office wirelessly.
The system can transmit power up to 5 metres, and charge up to 40 phones at a time - and is even powerful enough to power a TV.
The experimental Dipole Coil Resonant System can charge 40 smart phones simultaneously, even if the power source is 5 meters away. IMAGE: A prototype of the Dipole Coil Resonant System, developed by a KAIST research team, turns a LED television on at a 5-meter distance. Click here for more information. Daejeon, Republic of Korea, April 17, 2014 – The way electronic devices receive their power has changed tremendously over the past few decades, from wired to non-wired. Users today enjoy all kinds of wireless electronic gadgets including cell phones, mobile displays, tablet PCs, and even batteries. The Internet has also shifted from wired to wireless. Now, researchers and engineers are trying to remove the last remaining wires altogether by developing wireless power transfer technology. Chun T. Rim, a professor of Nuclear & Quantum Engineering at KAIST, and his team showcased, on
HOW IT WORKS
The technology and theory behind wireless charging have been around for a long time – the idea was initially suggested by Nikola Tesla, who demonstrated the principle of wireless charging at the turn of the century.
Wireless charging, also known as inductive charging, is based on a few simple principles.
The technology requires two coils: a transmitter and a receiver.
An alternating current is passed through the transmitter coil, generating a magnetic field.
This in turn induces a voltage in the receiver coil; this can be used to power a mobile device or charge a battery.
Called the 'Dipole Coil Resonant System', it is believed to be the longest range wireless power system developed so far, with a range of 5m.
'The way electronic devices receive their power has changed tremendously over the past few decades, from wired to non-wired,' the researchers say.
'Users today enjoy all kinds of wireless electronic gadgets including cell phones, mobile displays, tablet PCs, and even batteries.
Chun T. Rim, a professor of Nuclear & Quantum Engineering at KAIST in Korea, said the system could also power larger items.
'With DCRS a large LED TV as well as three 40 W-fans can be powered from a 5-meter distance.'
The distance is a record for wireless technology.
Current phone systems, for example, require the user to place their phone on a charging 'pad.
with the new system, they would never need to remove it from their bag or pocket.
'Our technology proved the possibility of a new remote power delivery mechanism that has never been tried at such a long distance.
'Although the long-range wireless power transfer is still in an early stage of commercialization and quite costly to implement, we believe that this is the right direction for electric power to be supplied in the future.
Some handsets, such as Nokia's Lumia range, already have wireless charging capabilities built in
'Just like we see Wi-Fi zones everywhere today, we will eventually have many Wi-Power zones at such places as restaurants and streets that provide electric power wirelessly to electronic devices.
'We will use all the devices anywhere without tangled wires attached and anytime without worrying about charging their batteries.'
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