Superconducting electric propulsion systems, characterized by high power densities and efficiencies, provide a possibility to zero carbon emission for future aviation. Stacks of high temperature superconducting (HTS) coated conductors (CCs) have become an alternative for high field magnets applied to superconducting machines, given their excellent field trapping ability and thermal stability. High-frequency ripple fields always exist in high-speed electric machines. Most research work regarding HTS trapped field stacks (TFSs) was focused on their magnetization methods and amplitude of trapped flux density; however, their performance in the high-frequency environment remains unclear. Despite several numerical models established for flat HTS TFSs, a comprehensive analysis of curved ones is still lacking, which possess geometrical applicability for cylindrical rotating shafts. Aimed at exploring the electromagnetic properties of curved HTS TFSs applied to high-speed rotating machines, a 3D numerical model considering both the multilayer structure and the J_c (B) dependence of HTS CCs has been built. Current and magnetic flux density distributions, as well as loss properties of a curved HTS TFS have been studied in detail, under perpendicular and cross fields with varying frequencies ranging from 50 Hz to 20 kHz. Results have shown that, the widely adopted two-dimensional-axisymmetric models are inapplicable to study the electromagnetic distributions of TFSs because of the emergence of the electromagnetic criss-cross defined in this paper. High-frequency ripple fields can drive induced current towards the periphery of the HTS TFS due to the skin effect, leading to a fast rise of AC loss and even an irreversible demagnetization of the stack. This paper has qualified and quantified the high-frequency electromagnetic behaviours of curved HTS TFSs, providing a useful reference for their loss controlling and anti-demagnetization design in high-speed propulsion machines.

具有高功率密度和高效率的超导电力推进系统为将来的航空业提供了零碳排放的可能性。高温超导（HTS）涂层导体（CC）的堆叠已经成为超导机器上使用的高磁场磁体的替代品，因为它们具有出色的场捕获能力和热稳定性。高频纹波场始终存在于高速电机中。关于高温超导俘获场堆（TFS）的大多数研究工作都集中在它们的磁化方法和俘获通量密度的幅度上。但是，它们在高频环境下的性能仍然不清楚。尽管建立了一些针对平板HTS TFS的数值模型，但仍缺乏对弯曲TTS TFS的全面分析，具有圆柱旋转轴的几何适用性。旨在探索应用于高速旋转机械的弯曲高温超导TFS的电磁特性，同时考虑了多层结构和结构的3D数值模型。Ĵ _Ç （乙）已建立对HTS CC的依赖性。在垂直和交叉电场下，在频率范围为50 Hz至20 kHz的变化范围内，已对弯曲HTS TFS的电流和磁通密度分布以及损耗特性进行了详细研究。结果表明，由于本文定义的电磁十字交叉的出现，被广泛采用的二维轴对称模型不适用于研究TFS的电磁分布。由于集肤效应，高频纹波场可以将感应电流驱动到HTS TFS的外围，从而导致AC损耗快速上升，甚至导致堆栈不可逆地消磁。本文对弯曲的HTS TFS的高频电磁行为进行了定性和量化，