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Optimal Magnetic Field Shielding Method by Metallic Sheets in Wireless Power Transfer System

Author

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  • Feng Wen

    (School of Electrical Engineering, Southeast University, No. 2 Sipailou, Nanjing 210096, China)

  • Xueliang Huang

    (School of Electrical Engineering, Southeast University, No. 2 Sipailou, Nanjing 210096, China)

Abstract

To meet the regulations established to limit human exposure to time-varying electromagnetic fields (EMFs) such as the International Committee on Non-Ionizing Radiation Protection (ICNIRP) guidelines, thin metallic sheets are often used to shield magnetic field leakage in high power applications of wireless power transfer (WPT) systems based on magnetic field coupling. However, the metals in the vicinity of the WPT coils cause the decrease of self and mutual inductances and increase of effective series resistance; as such, the electric performance including transmission power and the efficiency of the system is affected. With the research objective of further investigating excellent shielding effectiveness associated with system performance, the utilization of the optimal magnetic field shielding method by metallic sheets in magnetic field coupling WPT is carried out in this paper. The circuit and 3D Finite Element Analysis (FEA) models are combined to predict the magnetic field distribution and electrical performance. Simulation and experiment results show that the method is very effective by obtaining the largest possible coupling coefficient of the WPT coils within the allowable range and then reducing the value nearest to and no smaller than the critical coupling coefficient via geometric unbroken metallic sheets. The optimal magnetic field shielding method which considers the system efficiency, transmission power, transmission distance, and system size is also achieved using the analytic hierarchy process (AHP). The results can benefit WPT by helping to achieve efficient energy transfer and safe use in metal shielded equipment.

Suggested Citation

  • Feng Wen & Xueliang Huang, 2016. "Optimal Magnetic Field Shielding Method by Metallic Sheets in Wireless Power Transfer System," Energies, MDPI, vol. 9(9), pages 1-15, September.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:9:p:733-:d:77864
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    Citations

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    Cited by:

    1. Yushan Wang & Baowei Song & Zhaoyong Mao, 2020. "Analysis and Experiment for Wireless Power Transfer Systems with Two Kinds Shielding Coils in EVs," Energies, MDPI, vol. 13(1), pages 1-18, January.
    2. Marojahan Tampubolon & Laskar Pamungkas & Huang-Jen Chiu & Yu-Chen Liu & Yao-Ching Hsieh, 2018. "Dynamic Wireless Power Transfer for Logistic Robots," Energies, MDPI, vol. 11(3), pages 1-13, February.
    3. Mohamed, Ahmed A.S. & Shaier, Ahmed A. & Metwally, Hamid & Selem, Sameh I., 2020. "A comprehensive overview of inductive pad in electric vehicles stationary charging," Applied Energy, Elsevier, vol. 262(C).
    4. Md Morshed Alam & Saad Mekhilef & Mehdi Seyedmahmoudian & Ben Horan, 2017. "Dynamic Charging of Electric Vehicle with Negligible Power Transfer Fluctuation," Energies, MDPI, vol. 10(5), pages 1-20, May.
    5. Lantao Huang & Jiahao Zou & Yihan Zhou & Yan Hong & Jing Zhang & Zinan Ding, 2019. "Effect of Vertical Metal Plate on Transfer Efficiency of the Wireless Power Transfer System," Energies, MDPI, vol. 12(19), pages 1-15, October.
    6. Ruikun Mai & Liwen Lu & Yong Li & Tianren Lin & Zhengyou He, 2017. "Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems," Energies, MDPI, vol. 10(3), pages 1-17, February.
    7. Matjaz Rozman & Michael Fernando & Bamidele Adebisi & Khaled M. Rabie & Tim Collins & Rupak Kharel & Augustine Ikpehai, 2017. "A New Technique for Reducing Size of a WPT System Using Two-Loop Strongly-Resonant Inductors," Energies, MDPI, vol. 10(10), pages 1-18, October.
    8. Kafeel Ahmed Kalwar & Saad Mekhilef & Mehdi Seyedmahmoudian & Ben Horan, 2016. "Coil Design for High Misalignment Tolerant Inductive Power Transfer System for EV Charging," Energies, MDPI, vol. 9(11), pages 1-13, November.
    9. Matjaz Rozman & Michael Fernando & Bamidele Adebisi & Khaled M. Rabie & Rupak Kharel & Augustine Ikpehai & Haris Gacanin, 2017. "Combined Conformal Strongly-Coupled Magnetic Resonance for Efficient Wireless Power Transfer," Energies, MDPI, vol. 10(4), pages 1-18, April.
    10. Heqi Xu & Chunfang Wang & Dongwei Xia & Yunrui Liu, 2019. "Design of Magnetic Coupler for Wireless Power Transfer," Energies, MDPI, vol. 12(15), pages 1-12, August.
    11. Jianwei Kang & Jie Lu & Deyu Zeng & Xiangyang Shi, 2022. "Analysis and Visualization of the Instantaneous Spatial Energy Density and Poynting Vector of the Wireless Power Transfer System," Energies, MDPI, vol. 15(16), pages 1-18, August.
    12. Joao Victor Pinon Pereira Dias & Masafumi Miyatake, 2018. "Increase in Robustness against Effects of Coil Misalignment on Electrical Parameters Using Magnetic Material Layer in Planar Coils of Wireless Power Transfer Transformer," Energies, MDPI, vol. 11(8), pages 1-25, July.
    13. Yuan Li & Shumei Zhang & Ze Cheng, 2021. "Double-Coil Dynamic Shielding Technology for Wireless Power Transmission in Electric Vehicles," Energies, MDPI, vol. 14(17), pages 1-20, August.
    14. Feng Wen & Xueliang Huang, 2017. "Human Exposure to Electromagnetic Fields from Parallel Wireless Power Transfer Systems," IJERPH, MDPI, vol. 14(2), pages 1-15, February.

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