Electromagnetic Shielding Design for 200 kW Stationary Wireless Charging of Light-Duty EV

Bo Zhang; Richard B. Carlson; Veda P. Galigekere; Omer C. Onar; Jason L. Pries

doi:10.1109/ECCE44975.2020.9235329

Electromagnetic Shielding Design for 200 kW Stationary Wireless Charging of Light-Duty EV

Bo Zhang, Richard B. Carlson, Veda P. Galigekere, Omer C. Onar, Jason L. Pries

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

17 Scopus citations

Abstract

Wireless power transfer (WPT) is a developing technology with the advantage of convenience and flexible charging. SAE recommended practice J2954 defines typical size and geometry with aluminum or ferrite plate shielding to limit leakage electromagnetic (EM) fields for WPT with power levels lower than 22 kVA from the input side. However, as the WPT power goes up to 100- or 200-kW level, EM safety surrounding the WPT becomes a critical concern. To address this oncoming safety challenge, a novel ferrite shielding design is proposed in this paper. Different misalignment scenarios in accordance with definitions in SAE J2954 are also taken into consideration to ensure EM safety under various operation scenarios. Simulation results, which are preliminarily verified by magnetic field measurements at 1.1 m from the center of the vehicle side coil under 100 kW operation, indicate that the magnetic field leakage can be maintained below the limits defined in SAE J2954 for 200 kW operation. A 3.3 kW scale-down test was also carried out and compared to parallel scale-down simulations. 26.8% field emission reduction is observed from the scale-down test, which supports the effectiveness of the proposed shielding design.

Original language	English
Title of host publication	ECCE 2020 - IEEE Energy Conversion Congress and Exposition
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	5185-5192
Number of pages	8
ISBN (Electronic)	9781728158266
DOIs	https://doi.org/10.1109/ECCE44975.2020.9235329
State	Published - Oct 11 2020
Event	12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States Duration: Oct 11 2020 → Oct 15 2020

Publication series

Name	ECCE 2020 - IEEE Energy Conversion Congress and Exposition

Conference

Conference	12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Country/Territory	United States
City	Virtual, Detroit
Period	10/11/20 → 10/15/20

Funding

This manuscript was authored by Idaho National Laboratory, operated by Battelle Energy Alliance with the U.S. Department of Energy under DOE Contract No. DE-AC07-05ID14517. This manuscript has been co-authored by Oak Ridge National Laboratory, operated by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). ACKNOWLEDGMENT This work was supported by the U.S. Department of Energy (DOE), Vehicle Technologies Office, under the project FY2019 VTO AOI 3B: “High Power and Dynamic Wireless Charging for Electric Vehicles,” with collaborative partnership between Oak Ridge National Laboratory and Idaho National Laboratory. Authors thank Lee Slezak from U.S. DOE for project oversight and technical leadership.

Keywords

electric vehicle
electromagnetic field
ferrite shielding
inductive power transfer
wireless power transfer

Access to Document

10.1109/ECCE44975.2020.9235329

Cite this

Zhang, B., Carlson, R. B., Galigekere, V. P., Onar, O. C., & Pries, J. L. (2020). Electromagnetic Shielding Design for 200 kW Stationary Wireless Charging of Light-Duty EV. In ECCE 2020 - IEEE Energy Conversion Congress and Exposition (pp. 5185-5192). Article 9235329 (ECCE 2020 - IEEE Energy Conversion Congress and Exposition). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE44975.2020.9235329

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title = "Electromagnetic Shielding Design for 200 kW Stationary Wireless Charging of Light-Duty EV",

abstract = "Wireless power transfer (WPT) is a developing technology with the advantage of convenience and flexible charging. SAE recommended practice J2954 defines typical size and geometry with aluminum or ferrite plate shielding to limit leakage electromagnetic (EM) fields for WPT with power levels lower than 22 kVA from the input side. However, as the WPT power goes up to 100- or 200-kW level, EM safety surrounding the WPT becomes a critical concern. To address this oncoming safety challenge, a novel ferrite shielding design is proposed in this paper. Different misalignment scenarios in accordance with definitions in SAE J2954 are also taken into consideration to ensure EM safety under various operation scenarios. Simulation results, which are preliminarily verified by magnetic field measurements at 1.1 m from the center of the vehicle side coil under 100 kW operation, indicate that the magnetic field leakage can be maintained below the limits defined in SAE J2954 for 200 kW operation. A 3.3 kW scale-down test was also carried out and compared to parallel scale-down simulations. 26.8% field emission reduction is observed from the scale-down test, which supports the effectiveness of the proposed shielding design.",

keywords = "electric vehicle, electromagnetic field, ferrite shielding, inductive power transfer, wireless power transfer",

author = "Bo Zhang and Carlson, {Richard B.} and Galigekere, {Veda P.} and Onar, {Omer C.} and Pries, {Jason L.}",

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Zhang, B, Carlson, RB, Galigekere, VP, Onar, OC & Pries, JL 2020, Electromagnetic Shielding Design for 200 kW Stationary Wireless Charging of Light-Duty EV. in ECCE 2020 - IEEE Energy Conversion Congress and Exposition., 9235329, ECCE 2020 - IEEE Energy Conversion Congress and Exposition, Institute of Electrical and Electronics Engineers Inc., pp. 5185-5192, 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020, Virtual, Detroit, United States, 10/11/20. https://doi.org/10.1109/ECCE44975.2020.9235329

Electromagnetic Shielding Design for 200 kW Stationary Wireless Charging of Light-Duty EV. / Zhang, Bo; Carlson, Richard B.; Galigekere, Veda P. et al.
ECCE 2020 - IEEE Energy Conversion Congress and Exposition. Institute of Electrical and Electronics Engineers Inc., 2020. p. 5185-5192 9235329 (ECCE 2020 - IEEE Energy Conversion Congress and Exposition).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Zhang, Bo

AU - Carlson, Richard B.

AU - Galigekere, Veda P.

AU - Onar, Omer C.

AU - Pries, Jason L.

PY - 2020/10/11

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N2 - Wireless power transfer (WPT) is a developing technology with the advantage of convenience and flexible charging. SAE recommended practice J2954 defines typical size and geometry with aluminum or ferrite plate shielding to limit leakage electromagnetic (EM) fields for WPT with power levels lower than 22 kVA from the input side. However, as the WPT power goes up to 100- or 200-kW level, EM safety surrounding the WPT becomes a critical concern. To address this oncoming safety challenge, a novel ferrite shielding design is proposed in this paper. Different misalignment scenarios in accordance with definitions in SAE J2954 are also taken into consideration to ensure EM safety under various operation scenarios. Simulation results, which are preliminarily verified by magnetic field measurements at 1.1 m from the center of the vehicle side coil under 100 kW operation, indicate that the magnetic field leakage can be maintained below the limits defined in SAE J2954 for 200 kW operation. A 3.3 kW scale-down test was also carried out and compared to parallel scale-down simulations. 26.8% field emission reduction is observed from the scale-down test, which supports the effectiveness of the proposed shielding design.

AB - Wireless power transfer (WPT) is a developing technology with the advantage of convenience and flexible charging. SAE recommended practice J2954 defines typical size and geometry with aluminum or ferrite plate shielding to limit leakage electromagnetic (EM) fields for WPT with power levels lower than 22 kVA from the input side. However, as the WPT power goes up to 100- or 200-kW level, EM safety surrounding the WPT becomes a critical concern. To address this oncoming safety challenge, a novel ferrite shielding design is proposed in this paper. Different misalignment scenarios in accordance with definitions in SAE J2954 are also taken into consideration to ensure EM safety under various operation scenarios. Simulation results, which are preliminarily verified by magnetic field measurements at 1.1 m from the center of the vehicle side coil under 100 kW operation, indicate that the magnetic field leakage can be maintained below the limits defined in SAE J2954 for 200 kW operation. A 3.3 kW scale-down test was also carried out and compared to parallel scale-down simulations. 26.8% field emission reduction is observed from the scale-down test, which supports the effectiveness of the proposed shielding design.

KW - electric vehicle

KW - electromagnetic field

KW - ferrite shielding

KW - inductive power transfer

KW - wireless power transfer

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T3 - ECCE 2020 - IEEE Energy Conversion Congress and Exposition

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BT - ECCE 2020 - IEEE Energy Conversion Congress and Exposition

PB - Institute of Electrical and Electronics Engineers Inc.

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Zhang B, Carlson RB, Galigekere VP, Onar OC, Pries JL. Electromagnetic Shielding Design for 200 kW Stationary Wireless Charging of Light-Duty EV. In ECCE 2020 - IEEE Energy Conversion Congress and Exposition. Institute of Electrical and Electronics Engineers Inc. 2020. p. 5185-5192. 9235329. (ECCE 2020 - IEEE Energy Conversion Congress and Exposition). doi: 10.1109/ECCE44975.2020.9235329

Electromagnetic Shielding Design for 200 kW Stationary Wireless Charging of Light-Duty EV

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