| 摘要: |
| 超导电动悬浮列车以超导磁体作为核心部件，具有环境影响小、高速下自稳定、安全性能好等优点，已成为高速轨道交通的重要发展方向之一。然而，传统的磁体线圈结构存在绕组内磁场过于集中的问题，导致磁体的临界电流下降显著，列车的悬浮及安全性能也受到影响。针对现有悬浮磁体结构自场集中导致的临界电流衰减问题，本文提出了一种梯形高温超导磁体线圈结构。建立了一种可以提升磁体临界电流计算效率的均质自洽模型，设计了梯形结构线圈的结构参数并完成了磁体线圈的绕制。实验和计算结果表明，自洽模型计算的磁体临界电流与实验测量值吻合良好，验证了模型的准确性。利用该模型对日本山梨试验线上的全尺寸车载高温超导磁体进行了结构优化设计。研究发现，优化后的车载磁体绕组内磁场集中程度明显下降，车载磁体的临界电流及目标区域的磁场强度显著提高。本研究相关成果可为电动悬浮列车车载磁体的结构设计提供参考。 |
| 关键词: 超导电动悬浮 临界电流 自洽模型 均质化技术 梯形磁体 |
| DOI： |
| 投稿时间：2023-02-15修订日期：2023-04-17 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Simulation and Experimental Studies of Electromagnetic Characteristics of a Trapezoidal HTS Magnet |
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wuxinyu, lisonglin, wangruichen, gongtianyong, zhoupengbo, maguangtong
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| (State Key Laboratory of Tracation Power, Southwest Jiaotong University) |
| Abstract: |
| The electrodynamic suspension train with superconducting magnet as its core component has the advantages of small environmental impact, self-stability at high speed and excellent safety performance, it has become an important development directions of high-speed rail transit. However, the traditional magnet coil structure has the problem that the magnet field in the winding is too concentrated, resulting in a significant degeneration in the critical current of the magnet. The suspension and safety performance of the train are also affected. A trapezoidal HTS magnet coil structure is proposed in this work to solve the existing problem of critical current attenuation caused by self-field concentration in the suspension magnet structure. A homogenized self-consistent model that can improve the calculation efficiency is established to estimate the critical current and optimize the structure of the coil. The experimental and calculated results of the trapezoidal HTS magnet, which is designed and wound in our work, shows that the critical current of the magnet calculated by the self-consistent model agrees well with the experimental data, which verifies the accuracy of the model. Using the model, we optimize the structure of the real-scale onboard HTS magnet on the Yamanashi test line in Japan. The study found that the concentration of magnetic field in the magnet winding decreased significantly after optimization, the critical current of the on-board magnet and the magnetic field strength in the target region are significantly increased. The relevant results of this work can provide a reference for the structure design of the onboard magnet of electrodynamic suspension train. |
| Key words: Superconducting electrodynamic suspension Critical current Self-consistent model Homogenized technique Trapezoidal magnet |