Coil Design and Shielding Methods for a Magnetic Resonant Wireless Power Transfer System

Abstract

In this paper, we introduce the basic principles of wireless power transfer using magnetic field resonance and describe techniques for the design of a resonant magnetic coil, the formation of a magnetic field distribution, and electromagnetic field (EMF) noise suppression methods. The experimental results of wireless power transfer systems in consumer electronics applications are discussed in terms of issues related to their efficiency and EMF noise. Furthermore, we present a passive shielding method and a magnetic field cancellation method using a reactive resonant current loop and the utilization of these methods in an online electric vehicle (OLEV) system, in which an OLEV green transportation bus system absorbs wireless power from power cables underneath the road surface with only a minimal battery capacity.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Electromagnetic Field (EMF) Noise; Magnetic Field Resonance; Reactive Resonant Current Loop; Wireless Power Transfer (WPT)

International Standard Serial Number (ISSN)

0018-9219

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2013 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Mar 2013

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