Wireless Electricity

Once again the inspiration behind the theory of Nikola Tesla in wireless technology is extricated in this sci-fi tech demonstration of a cable-free electric power by the world renowned Massachusetts Institute of Technology (MIT) which offers an alternative means of harnessing the power of frequency signals to generate electricity. This MIT inspired project named WiTricity headed by Eric Giler envisions a plan to beam electric power through the air to wirelessly power your laptop or recharge your cellphones or even electric vehicles without the need to plug them in to wall outlets again. Early visions of wireless power were actually thought of by Nikola Tesla about a hundred years ago, although it was discontinued for mysterious reasons. Imagine the possibility of not needing to invest trillions of dollars in infrastructure around the world just to put up power lines to transmit power from a generating source to reach the consumers. And how about our dependence on batteries, we may not be aware but there's about 40 billion disposable batteries manufactured every year. The extent and complexities of these conventional methods of power sources are quite cumbersome considering that wires and batteries are becoming more and more expensive and difficult to dispose and handle. The basic concept behind the WiTricity technology is in using resonant energy transfer, given the mechanical construction of a transformer, it consists of two separate coils of wires very close to each other but without any physical contact or mechanical attachment, yet they do actually induce electromagnetic force with each other and transfer energy from one coil to the other coil at a very short distance. What was done here was to separate the coils in the transformer to a greater distance and have similar magnetic power transfer. How does it work? Imagine if you can manipulate a single coil with an attached capacitor to resonate in order for it to pulse at a fairly high alternating current (AC) frequency, then bring another coil close enough to the source that will only work at exactly that same frequency, then you can actually get them to do what is called a strongly coupled and transfered magnetic energy between them. The major concept here is using electricity on one end then turn it to magnetic field and take that magnetic field and turn it back to electricity on the other end.