Magnetic Field Design for Low EMF and High Efficiency Wireless Power Transfer System in On-Line Electric Vehicles

Abstract

In the mechanism of wireless power transfer in on-line electric vehicle (OLEV), the design of magnetic field
\nis the key technology to determine its electrical performance of power transfer capacity, transfer efficiency,
\nand electromagnetic field (EMF) level. To satisfy all the requirements, systematic approach for optimization
\nof design parameters is required. Even though shielding for reduction of EMF can be applied independently,
\nthe shielding effectiveness of the applicable shielding method should be considered in optimization of design
\nparameters. In this paper, we introduce the wireless power transfer mechanism and the EMF reduction
\ntechniques, and perform design parameter optimization to maximize transfer power efficiency while
\nsatisfying power transfer efficiency and EMF regulation.