Minimizing Leakage Magnetic Field of Wireless Power Transfer Systems Using Phase Difference Control

Seongho Woo, Yujun Shin, Changmin Lee, Jaewon Rhee, Jangyong Ahn, Jungick Moon, Seokhyeon Son, Sanguk Lee, Hongseok Kim and Seungyoung Ahn ()
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Seongho Woo: Cho Chun Shik Graduate School of Mobility, Korea Advanced Institute of Science and Technology, Daejeon 34051, Korea
Yujun Shin: Cho Chun Shik Graduate School of Mobility, Korea Advanced Institute of Science and Technology, Daejeon 34051, Korea
Changmin Lee: Cho Chun Shik Graduate School of Mobility, Korea Advanced Institute of Science and Technology, Daejeon 34051, Korea
Jaewon Rhee: Cho Chun Shik Graduate School of Mobility, Korea Advanced Institute of Science and Technology, Daejeon 34051, Korea
Jangyong Ahn: Cho Chun Shik Graduate School of Mobility, Korea Advanced Institute of Science and Technology, Daejeon 34051, Korea
Jungick Moon: Electronics and Telecommunications Research Institute, Daejeon 34129, Korea
Seokhyeon Son: Hyundai Motors, 40, Namyang 18270, Korea
Sanguk Lee: Cho Chun Shik Graduate School of Mobility, Korea Advanced Institute of Science and Technology, Daejeon 34051, Korea
Hongseok Kim: Cho Chun Shik Graduate School of Mobility, Korea Advanced Institute of Science and Technology, Daejeon 34051, Korea
Seungyoung Ahn: Cho Chun Shik Graduate School of Mobility, Korea Advanced Institute of Science and Technology, Daejeon 34051, Korea

Energies, 2022, vol. 15, issue 21, 1-18

Abstract: In this paper, we propose a method to reduce the leakage magnetic field from wireless power transfer (WPT) systems with series–series compensation topology by adjusting the phase difference between the transmitter (TX) coil current and the receiver (RX) coil current without additional shielding coils or materials. A WPT system employing the proposed method adjusts the phase difference between the TX coil current and RX coil current by tuning a resonant capacitor of the RX coil. The conditions for minimizing the leakage magnetic field are derived, and the range of the resonant capacitor of RX, considering power transfer efficiency and the leakage magnetic field, is proposed. Through simulations and experiments, it is verified that the proposed method can reduce the leakage magnetic field level without any additional materials. For that reason, the proposed method can be suitable for size-limited, weight-limited or cost-limited WPT systems.

Keywords: wireless power transfer (WPT); leakage magnetic field; electromagnetic field (EMF); shielding method (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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