知识与财富的链接
高温超导磁浮技术凭借其自稳定悬浮特性,展现出成为下一代磁悬浮交通制式的潜力。然而,作为系统核心的电磁道岔设备在适应复杂轨道网络时仍面临多重挑战。本研究旨在探索高温超导磁浮系统的电磁道岔设计与通过特性,重点分析其电磁阵列的磁场分布、电磁力计算方法及道岔通过性等关键问题。选取3种已提出的电磁道岔原理样机为研究对象,系统分析其道岔阵列形式、电磁铁结构组成、磁场分布特征及电磁力计算方法。通过仿真计算对比不同道岔阵列的磁场均匀性与可切换性,计算了超导悬浮单元通过道岔时的电磁力变化,包括横向力、纵向力、悬浮力衰减及偏航力矩演变规律。对比了超导悬浮单元在正常永磁轨道上以及在电磁道岔上的悬浮力曲线与导向力曲线的差异。同时,针对工程化应用需求,提出基于曲线布局的电磁道岔阵列形式,并对比了不同曲线半径、不同永磁轨道宽度和高度、不同道岔通过速度下的过岔电磁力结果。对比分析表明,3种道岔阵列均可实现前进方向的均匀可调磁场分布。超导悬浮系统过岔时存在横向力波动、悬浮力衰减和纵向力波动,偏航力矩呈现先增后减趋势,与道岔线路的空间磁场分布特征一致。超导悬浮单元在电磁道岔上的悬浮导向力特性与正常永磁轨道存在固有差异。新提出的曲线阵列布局增加了电磁道岔的可扩展性。通过过岔电磁力对比发现,曲线半径越大,过岔电磁力的波动范围越大。轨道参数影响轨道磁场的大小,从而影响过岔电磁力的波动幅值。不同的过岔速度对过岔电磁力无显著影响。对比直向过岔和侧向过岔,直向过岔的电磁力波动幅值更小。本研究对比了不同道岔阵列的磁场切换特性和超导块材过岔的电磁力响应,提出了曲线电磁道岔阵列布局并对比了不同工况下超导磁浮系统的过岔电磁力。相关结果为高温超导磁浮交通系统的工程化应用提供了理论支撑,同时为复杂轨道网络中的道岔设计提供了参考。
High-temperature superconducting (HTS) maglev technology, with its self-stable levitation characteristics, shows the potential to become the next-generation maglev transportation system. However, electromagnetic turnouts—the core components for adapting complex track—still face challenges. The purpose of this study was to explore the electromagnetic design and turnout crossing characteristics. Three proposed electromagnetic turnout prototypes were selected as research subjects, with systematic analyses of their structural compositions, magnetic field distribution, and electromagnetic force calculation. Through simulation comparisons, the magnetic field uniformity and switching capability were evaluated. The electromagnetic force including lateral force fluctuations, longitudinal force oscillations, levitation force attenuation, and yaw torque were calculated. The levitation and guiding force difference between the normal permanent magnet guideway (PMG) and the electromagnetic turnout was compared. According to the engineering requirements, the electromagnetic turnout array form based on curve layout was proposed, and the results of electromagnetic force under different curve radius, different width and height of PMG and different crossing speed were compared. Analysis results revealed that all three turnout arrays achieved uniformly adjustable magnetic field distributions. During HTS maglev crossing, lateral force fluctuations, levitation force attenuation, and longitudinal force oscillations were observed, while the yaw torque exhibited an initial increase followed by a decrease, consistent with the magnetic field distribution of the turnout. There is an inherent difference between the levitation characteristics above the electromagnetic turnout and the normal PMG. The new curved array layout increases the scalability of the electromagnetic turnout. Through the electromagnetic force comparison, it is found that the larger the curve radius, the larger the fluctuation range of the electromagnetic force. PMG parameters affect the magnitude of the magnetic field, thus affecting the amplitude of the electromagnetic force. The electromagnetic force is not obviously affected by the crossing speed. Compared with the straight crossing and the lateral crossing condition, the electromagnetic force fluctuation amplitude of the straight crossing is smaller. This study systematically compared the magnetic field switching characteristics of different turnout arrays and the electromagnetic force responses. These results provide critical theoretical support for the engineering application of HTS Maglev transportation systems.
