Comparison of leakage magnetic field from matched and mismatched double-d coil based wireless charging system for electric vehicles

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

doi:10.1109/ECCE.2019.8912989

Comparison of leakage magnetic field from matched and mismatched double-d coil based wireless charging system for electric vehicles

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

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

5 Scopus citations

Abstract

In this paper, a magnetic shield design is proposed for a matched and mismatched coil based high-power wireless charging system (WCS). The high-power WCS are highly prone to exceed the safety limits of both the electric and magnetic field leakage. The leakage magnetic field from the mismatched pads are higher than the matched pads. In a mismatched system, the receiver is usually made much smaller than the transmitter, which requires higher amp-turns in the coils to transfer the same amount of power. In addition, coupling factor is lower in mismatched systems. Therefore, the electromagnetic field (EMF) emission is higher for a mismatched system, compared to matched system where both the transmitter and receiver are similar and large. This phenomenon applies for both the nonpolarized-circular and DD pads. In this paper, the leakage magnetic field is compared for the matched-DD and mismatched-DD coil-based WCS. The leakage field is evaluated through finite element analysis (FEA) and verified experimentally through an 11 kW mismatched DD system. The results show that, the leakage magnetic field is much higher for a mismatched WCS, compared to a matched WCS.

Original language	English
Title of host publication	2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	5733-5739
Number of pages	7
ISBN (Electronic)	9781728103952
DOIs	https://doi.org/10.1109/ECCE.2019.8912989
State	Published - Sep 2019
Event	11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States Duration: Sep 29 2019 → Oct 3 2019

Publication series

Name	2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference	11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
Country/Territory	United States
City	Baltimore
Period	09/29/19 → 10/3/19

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
UT-Battelle
Oak Ridge National Laboratory

Keywords

Double-D pad
EMF emission
Electric vehicle
Inductive charging
Leakage field
Wireless charging

Access to Document

10.1109/ECCE.2019.8912989

Cite this

Mohammad, M., Pries, J., Onar, O., Anwar, S., Galigekere, V. P., Su, G. J., & Wilkins, J. (2019). Comparison of leakage magnetic field from matched and mismatched double-d coil based wireless charging system for electric vehicles. In 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 (pp. 5733-5739). Article 8912989 (2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2019.8912989

Mohammad, Mostak ; Pries, Jason ; Onar, Omer et al. / Comparison of leakage magnetic field from matched and mismatched double-d coil based wireless charging system for electric vehicles. 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019. Institute of Electrical and Electronics Engineers Inc., 2019. pp. 5733-5739 (2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019).

@inproceedings{97f667046868472c85f08dd93fe3285b,

title = "Comparison of leakage magnetic field from matched and mismatched double-d coil based wireless charging system for electric vehicles",

abstract = "In this paper, a magnetic shield design is proposed for a matched and mismatched coil based high-power wireless charging system (WCS). The high-power WCS are highly prone to exceed the safety limits of both the electric and magnetic field leakage. The leakage magnetic field from the mismatched pads are higher than the matched pads. In a mismatched system, the receiver is usually made much smaller than the transmitter, which requires higher amp-turns in the coils to transfer the same amount of power. In addition, coupling factor is lower in mismatched systems. Therefore, the electromagnetic field (EMF) emission is higher for a mismatched system, compared to matched system where both the transmitter and receiver are similar and large. This phenomenon applies for both the nonpolarized-circular and DD pads. In this paper, the leakage magnetic field is compared for the matched-DD and mismatched-DD coil-based WCS. The leakage field is evaluated through finite element analysis (FEA) and verified experimentally through an 11 kW mismatched DD system. The results show that, the leakage magnetic field is much higher for a mismatched WCS, compared to a matched WCS.",

keywords = "Double-D pad, EMF emission, Electric vehicle, Inductive charging, Leakage field, Wireless charging",

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

note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 ; Conference date: 29-09-2019 Through 03-10-2019",

year = "2019",

month = sep,

doi = "10.1109/ECCE.2019.8912989",

language = "English",

series = "2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "5733--5739",

booktitle = "2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019",

}

Mohammad, M, Pries, J, Onar, O, Anwar, S, Galigekere, VP, Su, GJ & Wilkins, J 2019, Comparison of leakage magnetic field from matched and mismatched double-d coil based wireless charging system for electric vehicles. in 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019., 8912989, 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019, Institute of Electrical and Electronics Engineers Inc., pp. 5733-5739, 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019, Baltimore, United States, 09/29/19. https://doi.org/10.1109/ECCE.2019.8912989

Comparison of leakage magnetic field from matched and mismatched double-d coil based wireless charging system for electric vehicles. / Mohammad, Mostak; Pries, Jason; Onar, Omer et al.
2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 5733-5739 8912989 (2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019).

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

TY - GEN

T1 - Comparison of leakage magnetic field from matched and mismatched double-d coil based wireless charging system for electric vehicles

AU - Mohammad, Mostak

AU - Pries, Jason

AU - Onar, Omer

AU - Anwar, Saeed

AU - Galigekere, Veda P.

AU - Su, Gui Jia

AU - Wilkins, Jonathan

PY - 2019/9

Y1 - 2019/9

N2 - In this paper, a magnetic shield design is proposed for a matched and mismatched coil based high-power wireless charging system (WCS). The high-power WCS are highly prone to exceed the safety limits of both the electric and magnetic field leakage. The leakage magnetic field from the mismatched pads are higher than the matched pads. In a mismatched system, the receiver is usually made much smaller than the transmitter, which requires higher amp-turns in the coils to transfer the same amount of power. In addition, coupling factor is lower in mismatched systems. Therefore, the electromagnetic field (EMF) emission is higher for a mismatched system, compared to matched system where both the transmitter and receiver are similar and large. This phenomenon applies for both the nonpolarized-circular and DD pads. In this paper, the leakage magnetic field is compared for the matched-DD and mismatched-DD coil-based WCS. The leakage field is evaluated through finite element analysis (FEA) and verified experimentally through an 11 kW mismatched DD system. The results show that, the leakage magnetic field is much higher for a mismatched WCS, compared to a matched WCS.

AB - In this paper, a magnetic shield design is proposed for a matched and mismatched coil based high-power wireless charging system (WCS). The high-power WCS are highly prone to exceed the safety limits of both the electric and magnetic field leakage. The leakage magnetic field from the mismatched pads are higher than the matched pads. In a mismatched system, the receiver is usually made much smaller than the transmitter, which requires higher amp-turns in the coils to transfer the same amount of power. In addition, coupling factor is lower in mismatched systems. Therefore, the electromagnetic field (EMF) emission is higher for a mismatched system, compared to matched system where both the transmitter and receiver are similar and large. This phenomenon applies for both the nonpolarized-circular and DD pads. In this paper, the leakage magnetic field is compared for the matched-DD and mismatched-DD coil-based WCS. The leakage field is evaluated through finite element analysis (FEA) and verified experimentally through an 11 kW mismatched DD system. The results show that, the leakage magnetic field is much higher for a mismatched WCS, compared to a matched WCS.

KW - Double-D pad

KW - EMF emission

KW - Electric vehicle

KW - Inductive charging

KW - Leakage field

KW - Wireless charging

UR - http://www.scopus.com/inward/record.url?scp=85076773813&partnerID=8YFLogxK

U2 - 10.1109/ECCE.2019.8912989

DO - 10.1109/ECCE.2019.8912989

M3 - Conference contribution

AN - SCOPUS:85076773813

T3 - 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

SP - 5733

EP - 5739

BT - 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019

Y2 - 29 September 2019 through 3 October 2019

ER -

Mohammad M, Pries J, Onar O, Anwar S, Galigekere VP, Su GJ et al. Comparison of leakage magnetic field from matched and mismatched double-d coil based wireless charging system for electric vehicles. In 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019. Institute of Electrical and Electronics Engineers Inc. 2019. p. 5733-5739. 8912989. (2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019). doi: 10.1109/ECCE.2019.8912989

Comparison of leakage magnetic field from matched and mismatched double-d coil based wireless charging system for electric vehicles

Abstract

Publication series

Conference

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this