Document Abstract
Our project titled “Wireless Power Transfer via Strongly Coupled Magnetic Resonances” .During the course of this research; we investigated the need and usefulness of wireless power transmission and the feasibility of using magnetic inductive coupling as the means for wireless power transmission. The paper will outline our design process and the logical steps we took in the experimentation and design of our circuits. The first section of the document will explicitly illustrate the goals we set to accomplish during the allotted time frame of three and a half weeks. With the complexity of the problem in mind and what we must accomplish, our team began research on the available means to transmit power without a physical connection. Existing techniques of wireless power transmission involving a pair of strongly magnetically coupled resonators allow transmission of tens of watts of power over a few meters. By introducing high Q L-C resonators, researchers are able to efficiently transfer power from one resonant transmitter to another resonant receiver. However, efficiency greatly deteriorates upon adding more receivers to the strongly coupled system because of the interactions between multiple coupled resonators. Implementation of a wireless power transmission system, we transmit near field wireless power with a goal not to maximize the distance of power transmission, but rather, to power devices on a surface. Our objective is to allow the introduction of numerous non- resonant pick up coils to enable multiple devices to be powered on the surface at once with only one resonant-transmitter with the goal of powering multiple devices with a single transmitter; we design a system that drives a primary inductor that is coupled with a high Q L-C secondary resonator.