- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
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| Citation: | LIU Qinghui, SHAN Lei, MA Weihua, LU Xiangyu, LUO Shihui. Electromagnetic Force Analysis of Medium−Low-Speed Maglev Considering Remanence[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 863-869, 895. doi: 10.3969/j.issn.0258-2724.20220281
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In order to explore the influence of the electromagnet remanence on the vertical electromagnetic force of EMS medium−low-speed maglev train, firstly, the change rule of the relative permeability of electromagnet is analyzed, and the levitation model of a single electromagnet is established based on the equivalent magnetic circuit method. Secondly, the limit hysteresis loop state of the levitation electromagnet is studied according to the Jiles-Atherton Hysteresis Theory, and the dynamic effect of the electromagnet remanence is analyzed. Finally, the vertical electromagnetic force is verified by the electromagnetic force bench test, and measures to maximize the use of electromagnetic efficiency are proposed. The results show that when the coil current is 0−20 A, the levitation electromagnet remanence is approximately equal to a constant, and the main influence factor of vertical electromagnetic force is the coil current. When the coil current is 20−40 A, the levitation electromagnet reaches the magnetic saturation state, and the levitation electromagnet has the maximum residual magnetism due to the limit hysteresis state, and the maximum difference is about 1 kN. With the further increase of the coil current, the reduction of the relative permeability of levitation electromagnet gradually weakens the remanence effect.
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