Wireless Power Transfer System

Abstract

The goal of the project was to develop a Wireless Power Transfer (WPT) System and im-plement it in innovative flooring. The project was done at NextFloor Oy, a company based in Helsinki, Finland. At the moment, Wireless Power Transmission is in the forefront of electronics research, which is why this study started as an initial attempt to investigate WPT in order to keep up with the fast growing industry. The main steps of the project were to study the physics behind wireless electricity transfer technologies, review the current industry situation and evaluate available solutions. Fur-thermore, the major objective included design of the printed circuit boards (PCBs), assem-bly and testing and development of original prototypes. As a result, the system consisting of a transmitter and receiver boards, was developed. It utilizes the inductive coupling method in order to transfer electricity wirelessly. The unique prototypes, a Qi standard compatible demo-table and non-standardized wireless power floor-demo, were designed to work together with the NextFloor ingenious flooring system. The goals were met and the 40 Watt Wireless Power Transfer System showed encourag-ing results. The primary part of this study was conducted during six months and further development and enhancements are carried out currently. The next essential phase in-cludes the development of the 100-Watt WPT system and its laptop charging implementa-tion and, finally, R&D of the magnetic resonance wireless energy transmission.