Levitation Force Compensation Methods for Suspension Electromagnets of Medium-Low Speed Maglev Trains
[Objective] As the train speed increases, the eddy current effect of medium-low speed maglev transportation tracks leads to a reduction in the suspension force of the head suspension electromagnets. The higher the speed, the more significant the reduction in suspension force of suspension electromag...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Urban Mass Transit Magazine Press
2025-06-01
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| Series: | Chengshi guidao jiaotong yanjiu |
| Subjects: | |
| Online Access: | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.20230131.html |
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| Summary: | [Objective] As the train speed increases, the eddy current effect of medium-low speed maglev transportation tracks leads to a reduction in the suspension force of the head suspension electromagnets. The higher the speed, the more significant the reduction in suspension force of suspension electromagnets for medium-low speed maglev trains. [Method] Taking the single electromagnet of a medium-low speed maglev train as example, a suspension force calculation method considering the nonlinear magnetic characteristics of the electromagnet is proposed. A three-dimensional model of the electromagnet is established using finite element electromagnetic field software. The suspension force is analyzed under a speed of 200 km/h, two compensation methods are compared: the original electromagnet adding a compensation electromagnet, and the original electromagnet extending the pole length of the head electromagnet. [Result & Conclusion] Two compensation methods for suspension force are identified: one is to add a compensation electromagnet about 300 mm length in front of the head electromagnet, connected in series with the two main electromagnets at the train head; the other is to extend the pole length of the head electromagnet by approximately 300 mm. These two levitation force compensation methods can increase the suspension force by 3.11 kN and 3.50 kN, respectively. The electromagnet module meets the levitation force requirements for train operation at a speed of 200 km/h. |
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| ISSN: | 1007-869X |