Design and Analysis of Platform Shielding for Wireless Charging Tram

Zhou, Ying; Zhang, Liwei; Xiu, Sanmu; Hao, Wenmei

doi:10.1109/access.2019.2939197

Cited by 7 publications

(2 citation statements)

References 14 publications

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“…Shielding of low frequency magnetic field using metal screens (enclosure, sheets, wire meshes) has been important for many decades and is now even more indispensable with the burgeoning number of RF transmitters and sensitive devices of all types [1][2][3][4][5][6]. Frequently, a screen has to contain apertures or slots for ventilation or cabling purposes.…”

Section: Introductionmentioning

confidence: 99%

Loop-to-Loop Magnetic Coupling Through a Circular Aperture in a Planar PEC Screen of Finite Thickness

Zhou

Zhang

et al. 2022

IEEE Access

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An analytical formulation for magnetic field penetration through a circular aperture in a thin perfect electric conductor (PEC) screen with finite-thickness is developed. Especially, we propose an analytical formula for the magnetic coupling between two circular loops separated by the screen and placed coaxially with the aperture. The formula is verified by finite element simulations and experimental data. The thickness effect is explained by the cut off attenuation of TE01 mode in the aperture. The influences of loopscreen-loop distance and loop radius on the coupling intensity are also investigated.

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Section: Introductionmentioning

confidence: 99%

Loop-to-Loop Magnetic Coupling Through a Circular Aperture in a Planar PEC Screen of Finite Thickness

Zhou

Zhang

et al. 2022

IEEE Access

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“…Low frequency magnetic shielding has wide applications in many fields, like electric vehicles [1], [2], wireless power transmission (WPT) system [3]- [5], ultrasensitive atomic sensors [6], and control circuit boards of IGBT devices [7]. Usually, a metallic shell is employed as shielding enclosure.…”

Section: Introductionmentioning

confidence: 99%

Shielding Effectiveness Analysis of the Conducting Spherical Shell With a Circular Aperture Against Low Frequency Magnetic Fields

et al. 2020

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In this paper, an analytical model is presented to calculate the low frequency magnetic shielding effective (SE) of the spherical shell with a circular aperture and finite conductivity. This model is obtained by the combination of two submodels: the finite conductivity shell without the aperture, and the perfect conductor shell with the aperture. Both the submodels have existing analytical solutions. The first submodel represents the diffusion effect of magnetic field penetration through the conducting shell, and the second one denotes the aperture effect of magnetic field leakage through the aperture. The total magnetic field is the superposition of these from the two submodels. Calculation results are provided for an aluminum spherical shell of radius 0.1m for frequencies between 10Hz and 1MHz. The results are in good agreement with these form 2D axisymmetric finite element simulations. It is shown that there is a critical frequency. Below this frequency, the diffusion effect is dominant and the SE enhances with the increase of frequency. Above this frequency, the aperture effect is dominant and the SE keeps unchanged with the variation of frequency. In addition, the phase shift characteristics are also analyzed for the two effects respectively, and are employed to elucidate the mechanism of the resonance phenomenon of the SE around the critical frequency. Further, the effect of aperture depth is investigated numerically, which shows that increasing the depth has similar effect on SE like reducing aperture radius.INDEX TERMS Shielding effectiveness, spherical shield, a circular aperture, the resonance phenomenon, magnetic shielding.

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Analytical Model for Low-Frequency Magnetic Field Penetration Through a Circular Aperture on a Perfect Electric Conductor Plate

Zhang

Yang

Jiao

et al. 2021

IEEE Trans. Electromagn. Compat.

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Design and Analysis of Platform Shielding for Wireless Charging Tram

Cited by 7 publications

References 14 publications

Loop-to-Loop Magnetic Coupling Through a Circular Aperture in a Planar PEC Screen of Finite Thickness

Loop-to-Loop Magnetic Coupling Through a Circular Aperture in a Planar PEC Screen of Finite Thickness

Shielding Effectiveness Analysis of the Conducting Spherical Shell With a Circular Aperture Against Low Frequency Magnetic Fields

Analytical Model for Low-Frequency Magnetic Field Penetration Through a Circular Aperture on a Perfect Electric Conductor Plate

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