Volume 24 Issue 6
Dec.  2024
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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2024  >  24(6): 172-182
SHEN Lu, ZHANG Li-wei, XIU San-mu, ZHANG Meng-lei, LIU Tao. Magnetic force calculation method of permanent magnet electromagnetic hybrid suspension system considering magnetic saturation[J]. Journal of Traffic and Transportation Engineering, 2024, 24(6): 172-182. doi: 10.19818/j.cnki.1671-1637.2024.06.012
Citation: SHEN Lu, ZHANG Li-wei, XIU San-mu, ZHANG Meng-lei, LIU Tao. Magnetic force calculation method of permanent magnet electromagnetic hybrid suspension system considering magnetic saturation[J]. Journal of Traffic and Transportation Engineering, 2024, 24(6): 172-182. doi: 10.19818/j.cnki.1671-1637.2024.06.012
shu

Magnetic force calculation method of permanent magnet electromagnetic hybrid suspension system considering magnetic saturation

doi: 10.19818/j.cnki.1671-1637.2024.06.012
  • 1.

    School of Electric Engineering, Beijing Jiaotong University, Beijing 100044, China

  • 2.

    Shenzhen Changlong Railway Electronic Engineering Co., Ltd., Shenzhen 518049, Guangdong, China

Funds:

National Natural Science Foundation of China 52337003

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    Abstract
  • To improve the accuracy and efficiency of magnetic force calculation of permanent magnet electromagnetic hybrid suspension system, the advantages of fast calculation speed of analytical method and high calculation accuracy of finite element method were comprehensively considered. Based on the equivalent surface current method, the permanent magnet in the system was equivalent to an electromagnetic coil. Then, the pure electromagnetic coil equivalent model of permanent magnet electromagnetic hybrid suspension system was established. Based on the current-flux linkage expression of the inductance of electromagnetic coil, namely the nonlinear magnetic saturation model and virtual displacement energy balance method, the analytical expression of the magnetic force for the permanent magnet electromagnetic hybrid suspension system was derived. Based on the finite element simulation results, the parameter variable-air gap equation was fitted, and the magnetic force calculation method of permanent magnet electromagnetic hybrid suspension system considering the magnetic saturation was determined. Analysis results show that the nonlinear magnetic saturation model of the inductance of electromagnetic coil can effectively express the influence of magnetic saturation on magnetic force calculation. When the current flowing through the electromagnetic coil of permanent magnet electromagnetic hybrid suspension system is 0, 2.0, 8.5, and 17.0 A, the average deviations of the magnetic force calculation results obtained by traditional analytical calculation formula and traditional finite element simulation results are 32.87%, 20.02%, 29.05%, and 25.67%, respectively. The average deviations of the magnetic force calculation results obtained by magnetic force calculation method considering the magnetic saturation compared with the traditional finite element simulation results are 1.68%, 1.64%, 1.58%, and 1.37%, respectively, and the average deviations compared with the test results are 1.66%, 1.77%, 0.91%, and 1.35%, respectively. Compared with the traditional analytical calculation formula, the proposed method greatly improves the accuracy of magnetic force calculation. Compared with the traditional finite element simulation method, the amount of calculation tasks of the proposed method reduces greatly, and the calculation efficiency improves greatly.

     

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