Design and Analysis of a Resonant Reactive Shield for a Wireless Power Electric Vehicle

In this paper, we propose the concept and design methodology for a resonant reactive shield for the reduction of magnetic field leakage from a wireless power transfer (WPT) systems. By using LC resonance, the reactive shield can generate a cancelling magnetic field to reduce the incident magnetic fi...

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Published inIEEE transactions on microwave theory and techniques Vol. 62; no. 4; pp. 1057 - 1066
Main Authors Kim, Seonghwan, Park, Hyun-Ho, Kim, Jonghoon, Kim, Jingook, Ahn, Seungyoung
Format Journal Article
LanguageEnglish
Published New York IEEE 01.04.2014
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Online AccessGet full text
ISSN0018-9480
1557-9670
DOI10.1109/TMTT.2014.2305404

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Abstract In this paper, we propose the concept and design methodology for a resonant reactive shield for the reduction of magnetic field leakage from a wireless power transfer (WPT) systems. By using LC resonance, the reactive shield can generate a cancelling magnetic field to reduce the incident magnetic field from WPT coils and effectively reduce the total magnetic field without consuming additional power. The shielding effectiveness of the resonant reactive shield and its effect on WPT efficiency are analyzed with simulation and measurements. For practical application to wirelessly charged electric vehicles, an automatic tuning system for the resonant reactive shield is also proposed and implemented. The effectiveness of a resonant reactive shielding is verified by experiments in a wirelessly charged electric bus.
AbstractList In this paper, we propose the concept and design methodology for a resonant reactive shield for the reduction of magnetic field leakage from a wireless power transfer (WPT) systems. By using LC resonance, the reactive shield can generate a cancelling magnetic field to reduce the incident magnetic field from WPT coils and effectively reduce the total magnetic field without consuming additional power. The shielding effectiveness of the resonant reactive shield and its effect on WPT efficiency are analyzed with simulation and measurements. For practical application to wirelessly charged electric vehicles, an automatic tuning system for the resonant reactive shield is also proposed and implemented. The effectiveness of a resonant reactive shielding is verified by experiments in a wirelessly charged electric bus.
Author Kim, Seonghwan
Ahn, Seungyoung
Park, Hyun-Ho
Kim, Jonghoon
Kim, Jingook
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  surname: Kim
  fullname: Kim, Seonghwan
  organization: Cho Chun Shik Graduate School for Green Transportation, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
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  givenname: Hyun-Ho
  surname: Park
  fullname: Park, Hyun-Ho
  organization: University of Suwon, Hwaseong, Korea
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  givenname: Jonghoon
  surname: Kim
  fullname: Kim, Jonghoon
  organization: KAIST, Daejeon, Korea
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  givenname: Jingook
  surname: Kim
  fullname: Kim, Jingook
  organization: UNIST, Ulsan, Korea
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  givenname: Seungyoung
  surname: Ahn
  fullname: Ahn, Seungyoung
  email: sahn@kaist.ac.kr
  organization: Cho Chun Shik Graduate School for Green Transportation, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
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SubjectTerms Coils
Electric vehicle
electromagnetic compatibility (EMC)
electromagnetic field
electromagnetic shielding
Impedance
Magnetic noise
Magnetic resonance
Magnetic separation
Magnetic shielding
wireless power transfer (WPT)
Title Design and Analysis of a Resonant Reactive Shield for a Wireless Power Electric Vehicle
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