Electromagnetic design method of wireless charging coil mounted under a vehicle

Hiroaki Yuasa, Nobuhiro Kibudera
BR Electric Vehicle・Charge System Development Dept, TOYOTA MOTOR CORPORATION
/ Norihito Kimura
Nippon Soken, Inc.

Abstract

In this presentation, we will introduce electromagnetic design method of wireless charging coil under a vehicle by using JMAG.
When wireless charging coil is mounted under a vehicle, leakage magnetic flux is interlinked to the body.
There is great impact to electromagnetic performance, such as charging efficiency , heat generation of the body, and the variation of inductance and coupling factor.
We measured electromagnetic performance under a vehicle, confirmed of the gap between the analysis and the actual measurement, and clarified loss distribution by leakage magnetic flux.
We will introduce this electromagnetic design method by using JMAG.

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