Design of an EMF suppressing magnetic shield for a 100-kW DD-coil wireless charging system for electric vehicles

Mostak Mohammad; Jason Pries; Omer Onar; Veda P. Galigekere; Gui Jia Su; Saeed Anwar; Jonathan Wilkins; Utkarsh D. Kavimandan; Devendra Patil

doi:10.1109/APEC.2019.8722084

Design of an EMF suppressing magnetic shield for a 100-kW DD-coil wireless charging system for electric vehicles

Mostak Mohammad, Jason Pries, Omer Onar, Veda P. Galigekere, Gui Jia Su, Saeed Anwar, Jonathan Wilkins, Utkarsh D. Kavimandan, Devendra Patil

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

33 Scopus citations

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%.

Original language	English
Title of host publication	34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1521-1527
Number of pages	7
ISBN (Electronic)	9781538683309
DOIs	https://doi.org/10.1109/APEC.2019.8722084
State	Published - May 24 2019
Event	34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 - Anaheim, United States Duration: Mar 17 2019 → Mar 21 2019

Publication series

Name	Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume	2019-March

Conference

Conference	34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
Country/Territory	United States
City	Anaheim
Period	03/17/19 → 03/21/19

Keywords

EMF
Electric vehicle
Inductive charging
Leakage field
Shielding effectiveness

Access to Document

10.1109/APEC.2019.8722084

Cite this

Mohammad, M., Pries, J., Onar, O., Galigekere, V. P., Su, G. J., Anwar, S., Wilkins, J., Kavimandan, U. D., & Patil, D. (2019). Design of an EMF suppressing magnetic shield for a 100-kW DD-coil wireless charging system for electric vehicles. In 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 (pp. 1521-1527). Article 8722084 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2019-March). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC.2019.8722084

Mohammad, Mostak ; Pries, Jason ; Onar, Omer et al. / Design of an EMF suppressing magnetic shield for a 100-kW DD-coil wireless charging system for electric vehicles. 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019. Institute of Electrical and Electronics Engineers Inc., 2019. pp. 1521-1527 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

@inproceedings{ed802e81e7734853a5fdf9c83178abdd,

title = "Design of an EMF suppressing magnetic shield for a 100-kW DD-coil wireless charging system for electric vehicles",

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%.",

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

author = "Mostak Mohammad and Jason Pries and Omer Onar and Galigekere, {Veda P.} and Su, {Gui Jia} and Saeed Anwar and Jonathan Wilkins and Kavimandan, {Utkarsh D.} and Devendra Patil",

note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 ; Conference date: 17-03-2019 Through 21-03-2019",

year = "2019",

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doi = "10.1109/APEC.2019.8722084",

language = "English",

series = "Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC",

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Mohammad, M, Pries, J, Onar, O, Galigekere, VP, Su, GJ, Anwar, S, Wilkins, J, Kavimandan, UD & Patil, D 2019, Design of an EMF suppressing magnetic shield for a 100-kW DD-coil wireless charging system for electric vehicles. in 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019., 8722084, Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, vol. 2019-March, Institute of Electrical and Electronics Engineers Inc., pp. 1521-1527, 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019, Anaheim, United States, 03/17/19. https://doi.org/10.1109/APEC.2019.8722084

Design of an EMF suppressing magnetic shield for a 100-kW DD-coil wireless charging system for electric vehicles. / Mohammad, Mostak; Pries, Jason; Onar, Omer et al.
34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 1521-1527 8722084 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2019-March).

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

TY - GEN

T1 - Design of an EMF suppressing magnetic shield for a 100-kW DD-coil wireless charging system for electric vehicles

AU - Mohammad, Mostak

AU - Pries, Jason

AU - Onar, Omer

AU - Galigekere, Veda P.

AU - Su, Gui Jia

AU - Anwar, Saeed

AU - Wilkins, Jonathan

AU - Kavimandan, Utkarsh D.

AU - Patil, Devendra

PY - 2019/5/24

Y1 - 2019/5/24

N2 - 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%.

AB - 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%.

KW - EMF

KW - Electric vehicle

KW - Inductive charging

KW - Leakage field

KW - Shielding effectiveness

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U2 - 10.1109/APEC.2019.8722084

DO - 10.1109/APEC.2019.8722084

M3 - Conference contribution

AN - SCOPUS:85067090759

T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

SP - 1521

EP - 1527

BT - 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019

Y2 - 17 March 2019 through 21 March 2019

ER -

Mohammad M, Pries J, Onar O, Galigekere VP, Su GJ, Anwar S et al. Design of an EMF suppressing magnetic shield for a 100-kW DD-coil wireless charging system for electric vehicles. In 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019. Institute of Electrical and Electronics Engineers Inc. 2019. p. 1521-1527. 8722084. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). doi: 10.1109/APEC.2019.8722084

Design of an EMF suppressing magnetic shield for a 100-kW DD-coil wireless charging system for electric vehicles

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Keywords

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