It was a dream of the prolific inventor Nikola Tesla to provide the world with wireless power and if not for the Great Depression of the 1930s he might have succeeded in giving the world its first extremely short range wireless power plant, but alas his project was left unfinished and it wasn’t until 2007 that MIT researchers managed to power a 60 Watt bulb wirelessly from a distance of 2 meters. The air is a lousy conductor of electricity and huge energy losses are incurred while current swims through a sea of molecular gas. Either way, things are improving, South Korea just announced a wireless phone charger that can charge 40 phones simultaneously, lets take a look.
A team from the Korea Advanced Institute of Science and Technology (KAIST) has announced that they have created a mammoth cell phone charger that transmits electric juice to your phone wirelessly. The public research institute basically built a huge nine feet long rod with a lot of wire wound around it to produce a magnetic field that powers all sorts of appliances.
This system is called the Dipole Coil Resonant System (DCRS) and it is capable of powering LED TVs, fans, bulbs etc at a distance of 5 metres or roughly more than 15 feet. This is both wider in range and more efficient than the system MIT used in 2007.
The team seems enthusiastic as it envisions a future where restaurants, malls, cinemas, gas stations and all sorts of public places that will provide free “Wi-tricity” to civilians to charge up their phones and tablets.