Embodiments of the invention relate to a method and
system for transferring power wirelessly to electronic devices. The
system can utilize magnetic
coupling between two coils at close proximity to transfer sufficient power to charge an electronic device. Embodiments of the invention pertain to an array of spiral coils that can be used to transmit power for transfer to
receiver coils. Potential applications of this technology include charging
consumer electronic devices (
cell phones, laptops, PDAs, etc), developing hermetically sealed devices for extreme environments, and
less invasive transcutaneous
energy transfer (TET) systems. Various embodiments of the subject
system can be referred to as PowerPad system. Embodiments can incorporate one or more of the following: planar inductors, PCB transformers, and
very high frequency power supplies. Embodiments of the invention also pertain to planar inductors having characteristics that allow the production of even
magnetic field, as well as systems that incorporate such planar inductors.