- 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
- Chinese Science Citation Database
| Citation: | FU Shanqiang, WU Donghua, HAN Weitao, ZHOU Ying. Modeling and Analysis of High-Speed Maglev Electromagnets Based on Nonlinear Materials[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 879-885. doi: 10.3969/j.issn.0258-2724.20220741
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In order to analyze the electromagnetic force characteristics of high-speed maglev electromagnets more accurately and efficiently and achieve good matching with control and dynamics models, a modeling method of electromagnetic force of high-speed maglev electromagnets based on nonlinear materials was proposed. Firstly, when the equivalent magnetic circuit (EMC) model of the electromagnet was built, the nonlinearity of the magnetic material was considered, and its reluctance was calculated based on the internal magnetic flux. The analytical model of the electromagnet was derived, with voltage and gap as input and current and electromagnetic force as output. The characteristics of the electromagnetic force, gap, and current were calculated and compared with traditional EMC models. Secondly, a finite element method (FEM) model of the electromagnet was built to validate the results of the nonlinear EMC model. Finally, the electromagnetic force of the maglev electromagnet was tested on a ground test bench, verifying the accuracy of the EMC and FEM models. The research results indicate that compared with that calculated by the traditional electromagnetic force model, the electromagnetic force calculated by the EMC model in this paper will experience saturation in the high current range, which is closer to the actual situation and has a wider application range. Under the magnetic gap of 12.5 mm and current of 50 A, the electromagnetic force deviation between EMC and FME is only 4.5%, and it is highly consistent with the test results. Therefore, the high-precision nonlinear electromagnetic force model lays the foundation for joint analysis of dynamic characteristics and parameter optimization of levitation systems.
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