Design of "magnetic resonance type" wpt systems based on filter theory

Abstract

A wireless power transfer system that is made of magnetically coupled resonators is designed for 0-Ω power sources. The design is based on the BPF theory which imposes more restrictions than the conventional power factor condition. Instead, it gives wider operating bandwidth and higher power transfer efficiency. The present paper derives the condition analytically and shows some useful design examples, including a two-stage and a three-stage system, as well as a system with a loop coil to transform the load impedance. © 2013 Wiley Periodicals, Inc. Electron Comm Jpn, 96(10): 1-11, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.11543 © 2013 Wiley Periodicals, Inc.