An on-board 2G HTS magnets system with cooling-power-free and persistent-current operation for ultrahigh speed superconducting maglevs
An on-board 2G HTS magnets system with cooling-power-free and persistent-current operation for ultrahigh speed superconducting maglevs
复制标题
用于超高速超导磁浮的车载 2G HTS 磁体系统，具有无冷却功率和持续电流操作
DOI：
10.1038/s41598-019-48136-x
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发表时间：
2019-08-14
影响因子：
4.6
通讯作者：
Shao, Nan
中科院分区：
文献类型：
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作者：
Dong, Fangliang;Huang, Zhen;Shao, Nan
与常规导体磁悬浮列车相比，将超导体引入磁悬浮列车大大提高了性能，例如从上海的Transrapid的430 km/h到日本的L0系列的603 km/h。然而，超导磁悬浮列车发展的重要制约因素之一是有限的无线馈电的车载超导磁体和低温冷却。本文提出了一种固态氮（SN 2）冷却保温的持续电流超导磁体系统，以解放其苛刻的车载供电要求。磁体采用无绝缘技术优化设计，保证在0.8T以上磁场下安全运行。持续电流（保持96.5%磁场）和SN 2冷却保温（最高40 K）的持续时间均>9 h，在平均设计速度>600 km/h的条件下，磁悬浮运行距离>5400 km。磁体具有15 g（147 m/s2）至350 Hz的抗振能力，已覆盖磁悬浮列车的振动范围。为超导磁悬浮的发展提供参考。
Introduction of superconductor to magnetic levitation (maglev) trains greatly enhances the performances compared to those of normal conductor maglevs, e.g. from 430 km/h of the Transrapid (in Shanghai) to 603 km/h of the L0 Series in Japan. However, one of the important constraints on development of superconducting maglevs is limited wireless feeding power for on-board superconducting magnets and cryogenic cooling. In this paper, a persistent-current superconducting magnets system with solid nitrogen (SN2) cooling preservation is proposed for liberation of its demanding on-board power feeding requirement. The magnets are optimally designed with no-insulation technique guaranteeing a safe operation with magnetic field over 0.8 T. Lasting time of persistent current (at 96.5% magnetic field retained) and SN2cooling preservation (up to 40 K) is all >9 h, covering a maglev traveling distance of >5400 km at average designed speed of >600 km/h. The magnets have anti-vibration ability of 15 g (147 m/s2) up to 350 Hz, which has covered the vibratory motion range in maglevs. This work is intended to provide a reference for superconducting maglev developments.