- By:
- Mohammad, Mostak ; Pries, Jason L; Onar, Omer C; Galigekere, Veda Prakash ; Su, Gui-Jia ; Anwar, Saeed ; Wilkins, Jonathan P; Kavimandan, Utkarsh D; Patil, Devendra R
- Page Number:
- 1521-1527
- Issue Number:
- 1
- Book Title:
- 2019 IEEE Applied Power Electronics Conference and Exposition (APEC)
- Publication Date:
- March 12, 2026
- Publisher Location:
- IEEE, New Jersey, United States of America
- Conference Name:
- Applied Power Electronics Conference and Exposition (APEC 2019)
- Conference Location:
- Anaheim, California, United States of America
- Conference Sponsor:
- IEEE Power Electronics Society, IEEE Industry Applications Society, Power Source Manufacturers Association
- View DOI Listing:
- https://doi.org/10.1109/APEC.2019.8722084
Abstract
This study investigates the electromagnetic field (EMF) emissions of a 100-kW Double-D (DD) wireless charging system (WCS). A shielding technique is proposed to suppress the magnetic field emissions below the limits set by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The leakage pattern produced by the DD coil is different than unipolar (circular, rectangular, etc.) pads and traditional eddy current based aluminum shields are not effective at suppressing this leakage field. Therefore, a methodically designed magnetic shield could be more effective. This study proposes a shielding technique for DD coils using a combination of aluminum shielding and a low reluctance magnetic shield to suppress the magnetic field emissions. The shielding effectiveness is evaluated through finite element analysis (FEA) models and tested experimentally. The effectiveness of the proposed magnetic shielding and the limits of the conventional aluminum shielding are studied. A prototype 11-kW DD coil wireless charging system is used to experimentally validate the proposed shielding technique. The experimental results show that the aluminum shield increases the emissions of DD coils by 25% and the proposed magnetic shield can be employed to suppress the emission by 60%.
