The Research on Electromagnetic Interference of Liquid Crystal Display Screen on Low-medium Speed Maglev Trains

Authors

  • Yutao Tang Institute of Electronic and Electrical Engineering Civil Aviation Flight University of China, Guanghan 618307, China
  • Xin Li Institute of Electronic and Electrical Engineering Civil Aviation Flight University of China, Guanghan 618307, China
  • Chao Zhou Institute of Electronic and Electrical Engineering Civil Aviation Flight University of China, Guanghan 618307, China

DOI:

https://doi.org/10.13052/2024.ACES.J.391210

Keywords:

Coupling mechanism, electromagnetic interference, interference suppression, transverse end effect

Abstract

Low-medium speed maglev trains might suffer from electromagnetic interference (EMI) during operation, which is specifically manifested as a blurred image on the liquid crystal display (LCD) screens of the passenger information system (PIS). In order to study the characteristics of the EMI, firstly, the working principle of PIS is analyzed in response to the fault phenomenon of the LCD screens. Possible interference sources are studied. Research results indicate that the leakage magnetic field generated by the transverse end effect of linear motors is the main interference source causing LCD screen faults. Secondly, the coupling mechanism of the EMI is analyzed. Results show that the transverse end effect can cause an increase in the ground potential of the LCD screen casing, resulting in a blurred image on the LCD screen. Finally, the EMI suppression method by suspending and grounding the LCD screen is proposed and its feasibility is verified. In this paper, we comprehensively study the EMI of LCD screens, which provides a theoretical basis for solving the tangible faults of maglev trains.

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Author Biographies

Yutao Tang, Institute of Electronic and Electrical Engineering Civil Aviation Flight University of China, Guanghan 618307, China

Yutao Tang was born in Sichuan Province, China, in 1991. She received the Ph.D. degree in electrical engineering at Southwest Jiaotong University, Chengdu, China, in 2021. She is currently a Lecturer in the Institute of Electronic and Electrical Engineering, Civil Aviation Flight University of China. Her research interests include electromagnetic environment test and evaluation, and electromagnetic compatibility analysis and design.

Xin Li, Institute of Electronic and Electrical Engineering Civil Aviation Flight University of China, Guanghan 618307, China

Xin Li received the Ph.D. degree in electrical engineering from Southwest Jiaotong University, Chengdu, China. He is currently a research associate in the Civil Aviation Flight University of China, Chengdu, China. His current research interests include electromagnetic compatibility analysis, evaluation, transmission line analysis, rail traffic, civil unmanned aerial vehicles, and navigation technology research.

Chao Zhou, Institute of Electronic and Electrical Engineering Civil Aviation Flight University of China, Guanghan 618307, China

Chao Zhou was born in AnHui, Province, China, in 1980. He received his Ph.D. degree from University of Electronic Science and Technology of China in 2013. He is working in Civil Aviation Flight University of China, where he is currently a professor, deputy dean of the Institute of Electronic and Electrical Engineering, master tutor, and head of the UAV team. His current research interests include civil unmanned aerial vehicles and civil aviation electromagnetic environment effects.

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Published

2024-12-31

How to Cite

[1]
Y. . Tang, X. . Li, and C. . Zhou, “The Research on Electromagnetic Interference of Liquid Crystal Display Screen on Low-medium Speed Maglev Trains”, ACES Journal, vol. 39, no. 12, pp. 1116–1124, Dec. 2024.

Issue

2024: Vol 39 Iss 12

Section

General Submission

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