Overview
The current implementation of wireless power transfer uses inductive power transfer, involving strongly coupled coils and high efficiency, close range transfer. This technology only works with ranges less than a few centimeters, and the coils must be orientated correctly to affect efficient power transfer. A different technology known as Magnetic Resonant Power Transfer has emerged that promises mid range, yet still high efficiency power transfer. The transmitting and receiving coils are loosely coupled, meaning the distance between them and their relative orientation is much more flexible, but resonate at a fixed frequency that still facilitates efficient transfer between them. Using this technology we are implementing a wireless power transfer system to charge a wireless phone at farther ranges than is possible with inductive technology.
Block Diagram
