Design and Analysis of Platform Shielding for Wireless Charging Tram

Abstract

The application of inductive power transmission system in trams makes trams get rid of the traditional overhead catenary, but the electromagnetic environment and safety problems brought by the inductive power transmission system also attract the public's attention. In this paper, the model of the wireless charging tram platform is built to analyze the electromagnetic environment when the tram stops at the platform. Then, the shielding shape of the platform is proposed. A mathematical model with the minimum shielding cost as the goal and the magnetic field and installation space as constraints, is proposed for the platform shielding model of wireless charging tram. The three-dimensional finite element simulation software is used to verify the designed platform shield. The results show that the designed platform shield can ensure the electromagnetic radiation at the platform reaches the standard, and the cost is low. The platform shielding scheme designed in this paper provides a theoretical basis for the establishment of electromagnetic protection measures in the practical application of the wireless charging tram.

Low-frequency Magnetic Shielding of a Cavity Formed by Two Imperfectly Conducting Sheets: Effect of Sheet-to-sheet Distance and Comparison with the Single-sheet Configuration

“…Shielding of low-frequency magnetic fields is frequently needed in many practical applications involving high magnetic fields, such as wireless power transmission [1,2], electric vehicles [3,4], magnetic resonance imaging [5], pulse power systems [6], and spot welding guns [7]. The shielding effectiveness (SE) of a shielding structure depends not only on its geometry, size, and material but also on the selected field source and observation point [8,9].…”

Low-frequency Magnetic Shielding of Double-layer Conducting Plates with Periodic Apertures: Experimental Observation of Great Improvement of Shielding Effectiveness by Slightly Separating the Two Plates

“…Low-frequency magnetic shielding is frequently commonly used to prevent electromagnetic interference in various practical applications, including electric vehicles [1], wireless power transfer [2,3], power converters [4], ultrasensitive atomic sensors [5], resistance spot welding [6], magnetic resonance imaging [7], and power transformers [8]. Depending on specific requirements and working environments, different shielding configurations are selected, such as enclosures [1,9], solid plates [10][11][12][13][14], perforated plates [15][16][17], and wire meshes [18][19][20][21].…”

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

“…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.…”