Modeling and Analysis of a Novel Levitation Magnet with Damping Coils for High-Speed Maglev Train

Shanqiang Fu, Zigang Deng (), Weitao Han (), Xinmai Gao and Ying Zhou
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Shanqiang Fu: State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, China
Zigang Deng: State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, China
Weitao Han: CRRC Qingdao Sifang Company Ltd., Qingdao 266111, China
Xinmai Gao: CRRC Qingdao Sifang Company Ltd., Qingdao 266111, China
Ying Zhou: CRRC Qingdao Sifang Company Ltd., Qingdao 266111, China

Sustainability, 2024, vol. 16, issue 12, 1-15

Abstract: In this work, a novel levitation magnet with damping coil is proposed to address the existing issues and improve reliability. The fault mechanism of the existing magnet is analyzed and validated using a coupling model combined with inductive voltage experiments. The magnetic yoke with damping coils is designed and the equivalent magnetic circuit (EMC) model of the magnet is established. The nonlinearity of magnetic materials and the magnetic flux fluctuation due to the tooth-slot effect are considered in the EMC model. Simultaneously, the transient finite element (FEM) model is built. The magnetic flux of yoke, the inductive current of the damping coil, and the magnetic force are analyzed. A good agreement is found between EMC and FEM. Additionally, the static magnetic force is tested on the magnet test platform to validate EMC and FEM models. Results reveal that compared with the existing magnet, the magnetic flux fluctuation with damping coils is significantly reduced, and the inductive voltages with the damping coil are significantly decreased. The novel magnet with damping coils featuring excellent magnetic characteristics is more advantageous for the system’s security and durability.

Keywords: damping coils; magnetic circuit; inductive voltage; magnetic flux; magnetic force (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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