Design and Characteristics of Null-Flux Permanent Magnet Electrodynamic Suspension System

SHI Hongfu; DENG Zigang; HUANG Huan; ZHU Hanlin; XIANG Yuqing; ZHENG Jun; LIANG Le; YANG Jing

doi:10.3969/j.issn.0258-2724.20211062

Volume 58 Issue 4

Aug. 2023

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Journal of Southwest Jiaotong University > 2023 > 58(4): 853-862.

SHI Hongfu, DENG Zigang, HUANG Huan, ZHU Hanlin, XIANG Yuqing, ZHENG Jun, LIANG Le, YANG Jing. Design and Characteristics of Null-Flux Permanent Magnet Electrodynamic Suspension System[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 853-862. doi: 10.3969/j.issn.0258-2724.20211062

Citation:

SHI Hongfu, DENG Zigang, HUANG Huan, ZHU Hanlin, XIANG Yuqing, ZHENG Jun, LIANG Le, YANG Jing. Design and Characteristics of Null-Flux Permanent Magnet Electrodynamic Suspension System[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 853-862. doi: 10.3969/j.issn.0258-2724.20211062

Citation:

SHI Hongfu, DENG Zigang, HUANG Huan, ZHU Hanlin, XIANG Yuqing, ZHENG Jun, LIANG Le, YANG Jing. Design and Characteristics of Null-Flux Permanent Magnet Electrodynamic Suspension System[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 853-862. doi: 10.3969/j.issn.0258-2724.20211062

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Design and Characteristics of Null-Flux Permanent Magnet Electrodynamic Suspension System

doi: 10.3969/j.issn.0258-2724.20211062

1.
School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
2.
State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, China
3.
School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
4.
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
5.
Research Center for Super-High-Speed Evacuated Tube Maglev Transport, Southwest Jiaotong University, Chengdu 610031, China
6.
CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130000, China

Received Date: 24 Dec 2021
Rev Recd Date: 07 Jun 2022

Available Online: 06 Dec 2022

Publish Date: 09 Jun 2022

Abstract

Abstract

A novel permanent magnet electrodynamic suspension system is proposed to improve the guidance ability and reduce the drag force. First, a three-dimensional electromagnetic-force analytical model considering the longitudinal end-edge effect of the magnets is established and solved. Second, a three-dimensional finite element model is built. Compared with simulation results, the accuracy and reliability of the analytical model are verified. On the basis of the finite element model, the time domain characteristics of electromagnetic forces and the coupling process between the magnets and the guideway coils are analyzed. Finally, the levitation performance and levitation-drag characteristics of the system are studied according to the levitation-to-weight ratio and the levitation-to-drag ratio. Compared with those of a flat-type electrodynamic suspension system, the results reveal that the proposed system is feasible, with a simple structure, low energy consumption, and large levitation-to-drag ratio. The system overcomes issues associated with a weak guidance ability and a low levitation-to-drag ratio. In the high-speed range, the levitation-to-drag ratio can reach 65, which is 2.5 times higher than that of planar permanent magnet electrodynamic suspension. The proposed system and the corresponding three-dimensional analytical model can lay a foundation for future maglev transportation.
- permanent magnet electrodynamic suspension,
- Halbach array,
- coils array,
- null-flux coil,
- levitation-to-drag ratio

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References(30)

References

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