Analysis of magnetic field emissions and shield requirements for interoperating high-power EV wireless charging system

Mostak Mohammad; Omer C. Onar; Jason L. Pries; Veda P. Galigekere; Gui Jia Su; Jonathan Wilkins

doi:10.1109/APEC42165.2021.9487265

Analysis of magnetic field emissions and shield requirements for interoperating high-power EV wireless charging system

Mostak Mohammad, Omer C. Onar, Jason L. Pries, Veda P. Galigekere, Gui Jia Su, Jonathan Wilkins

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

8 Scopus citations

Abstract

In this study, the magnetic field emission (MFE) is investigated for matching (identical primary and secondary couplers) and interoperating (different couplers) 11 kW wireless charging systems (WCS). The interoperating charging pads generate higher MFE than the matching charging-pads; hence, using interoperable couplers requires a more effective shielding. In this work, different shield topologies are investigated to suppress the MFE for interoperable conditions. Four 11 kW WCSs with the unipolar (uni) and bipolar (bi) transmitter (Tx) and receiver (Rx) pads has been investigated: 1) uniTx with uniRx, 2) uniTx with biRx, 3) biTx with uniRx, and 4) biTx with bi-Rx. The studied systems are designed for 11 kW WPT3 level with Z2 airgap class (140-150 mm) resembling the standard SAE-J2954. The WCSs are simulated in finite element analysis (FEA) and validated experimentally using a 11 kW biTx-biRx system. The experimental results match with the simulation results with <5% error. The FEA results show that a biTx needs a magnetic shield, and a uniTx needs an aluminum shield to meet the MFE under all interoperability and alignment conditions.

Original language	English
Title of host publication	2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1586-1592
Number of pages	7
ISBN (Electronic)	9781728189499
DOIs	https://doi.org/10.1109/APEC42165.2021.9487265
State	Published - Jun 14 2021
Event	36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021 - Virtual, Online, United States Duration: Jun 14 2021 → Jun 17 2021

Publication series

Name	Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Conference

Conference	36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021
Country/Territory	United States
City	Virtual, Online
Period	06/14/21 → 06/17/21

Funding

This manuscript has been 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 non-exclusive, paid-up, irrevocable, world-wide 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).

Funders	Funder number
U.S. Department of Energy

Keywords

EMF
Electric vehicle
Inductive charging
Leakage field
Shielding effectiveness

Access to Document

10.1109/APEC42165.2021.9487265

Cite this

Mohammad, M., Onar, O. C., Pries, J. L., Galigekere, V. P., Su, G. J., & Wilkins, J. (2021). Analysis of magnetic field emissions and shield requirements for interoperating high-power EV wireless charging system. In 2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021 (pp. 1586-1592). (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC42165.2021.9487265

Mohammad, Mostak ; Onar, Omer C. ; Pries, Jason L. et al. / Analysis of magnetic field emissions and shield requirements for interoperating high-power EV wireless charging system. 2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021. Institute of Electrical and Electronics Engineers Inc., 2021. pp. 1586-1592 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

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title = "Analysis of magnetic field emissions and shield requirements for interoperating high-power EV wireless charging system",

abstract = "In this study, the magnetic field emission (MFE) is investigated for matching (identical primary and secondary couplers) and interoperating (different couplers) 11 kW wireless charging systems (WCS). The interoperating charging pads generate higher MFE than the matching charging-pads; hence, using interoperable couplers requires a more effective shielding. In this work, different shield topologies are investigated to suppress the MFE for interoperable conditions. Four 11 kW WCSs with the unipolar (uni) and bipolar (bi) transmitter (Tx) and receiver (Rx) pads has been investigated: 1) uniTx with uniRx, 2) uniTx with biRx, 3) biTx with uniRx, and 4) biTx with bi-Rx. The studied systems are designed for 11 kW WPT3 level with Z2 airgap class (140-150 mm) resembling the standard SAE-J2954. The WCSs are simulated in finite element analysis (FEA) and validated experimentally using a 11 kW biTx-biRx system. The experimental results match with the simulation results with <5% error. The FEA results show that a biTx needs a magnetic shield, and a uniTx needs an aluminum shield to meet the MFE under all interoperability and alignment conditions.",

keywords = "EMF, Electric vehicle, Inductive charging, Leakage field, Shielding effectiveness",

author = "Mostak Mohammad and Onar, {Omer C.} and Pries, {Jason L.} and Galigekere, {Veda P.} and Su, {Gui Jia} and Jonathan Wilkins",

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Mohammad, M , Onar, OC, Pries, JL, Galigekere, VP, Su, GJ & Wilkins, J 2021, Analysis of magnetic field emissions and shield requirements for interoperating high-power EV wireless charging system. in 2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021. Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Institute of Electrical and Electronics Engineers Inc., pp. 1586-1592, 36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021, Virtual, Online, United States, 06/14/21. https://doi.org/10.1109/APEC42165.2021.9487265

Analysis of magnetic field emissions and shield requirements for interoperating high-power EV wireless charging system. / Mohammad, Mostak ; Onar, Omer C.; Pries, Jason L. et al.
2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021. Institute of Electrical and Electronics Engineers Inc., 2021. p. 1586-1592 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

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

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AU - Mohammad, Mostak

AU - Onar, Omer C.

AU - Pries, Jason L.

AU - Galigekere, Veda P.

AU - Su, Gui Jia

AU - Wilkins, Jonathan

PY - 2021/6/14

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N2 - In this study, the magnetic field emission (MFE) is investigated for matching (identical primary and secondary couplers) and interoperating (different couplers) 11 kW wireless charging systems (WCS). The interoperating charging pads generate higher MFE than the matching charging-pads; hence, using interoperable couplers requires a more effective shielding. In this work, different shield topologies are investigated to suppress the MFE for interoperable conditions. Four 11 kW WCSs with the unipolar (uni) and bipolar (bi) transmitter (Tx) and receiver (Rx) pads has been investigated: 1) uniTx with uniRx, 2) uniTx with biRx, 3) biTx with uniRx, and 4) biTx with bi-Rx. The studied systems are designed for 11 kW WPT3 level with Z2 airgap class (140-150 mm) resembling the standard SAE-J2954. The WCSs are simulated in finite element analysis (FEA) and validated experimentally using a 11 kW biTx-biRx system. The experimental results match with the simulation results with <5% error. The FEA results show that a biTx needs a magnetic shield, and a uniTx needs an aluminum shield to meet the MFE under all interoperability and alignment conditions.

AB - In this study, the magnetic field emission (MFE) is investigated for matching (identical primary and secondary couplers) and interoperating (different couplers) 11 kW wireless charging systems (WCS). The interoperating charging pads generate higher MFE than the matching charging-pads; hence, using interoperable couplers requires a more effective shielding. In this work, different shield topologies are investigated to suppress the MFE for interoperable conditions. Four 11 kW WCSs with the unipolar (uni) and bipolar (bi) transmitter (Tx) and receiver (Rx) pads has been investigated: 1) uniTx with uniRx, 2) uniTx with biRx, 3) biTx with uniRx, and 4) biTx with bi-Rx. The studied systems are designed for 11 kW WPT3 level with Z2 airgap class (140-150 mm) resembling the standard SAE-J2954. The WCSs are simulated in finite element analysis (FEA) and validated experimentally using a 11 kW biTx-biRx system. The experimental results match with the simulation results with <5% error. The FEA results show that a biTx needs a magnetic shield, and a uniTx needs an aluminum shield to meet the MFE under all interoperability and alignment conditions.

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KW - Electric vehicle

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KW - Leakage field

KW - Shielding effectiveness

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Mohammad M , Onar OC, Pries JL, Galigekere VP, Su GJ , Wilkins J. Analysis of magnetic field emissions and shield requirements for interoperating high-power EV wireless charging system. In 2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021. Institute of Electrical and Electronics Engineers Inc. 2021. p. 1586-1592. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). doi: 10.1109/APEC42165.2021.9487265

Analysis of magnetic field emissions and shield requirements for interoperating high-power EV wireless charging system

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