We conducted electromagnetic field analyses of spiral copper-plated striated coated-conductor cable (SCSC cable), where the striated (multifilament) and copper-plated coated conductors were twisted spirally around a round core in order to decouple the filaments. We used a numerical model which was formulated with current vector potential and in which thin-strip approximation was applied to the superconductor layer of the coated conductors. The nonlinear conductivity obtained from measured electric field–current density characteristics was used to represent the superconducting properties. To confirm the effect of the spiral twist in the SCSC cables, we determined their coupling time constants from the frequency dependences of their calculated magnetisation losses, under an ac transverse magnetic field with a small amplitude. Moreover, we calculated the ac losses in the SCSC cables under simultaneous application of ac transverse magnetic fields and ac transport currents, which rep...

中文翻译：

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螺旋镀铜横纹涂层导体电缆（SCSC电缆）的耦合时间常数和交流损耗特性

我们对螺旋镀铜横纹涂层导体电缆（SCSC电缆）进行了电磁场分析，其中将横纹（复丝）和镀铜涂层导体绕圆形芯线螺旋扭曲以解耦细丝。我们使用一个由电流矢量电势公式化的数值模型，其中将薄带近似法应用于涂层导体的超导体层。从测量的电场-电流密度特性获得的非线性电导率可用来表示超导特性。为了确认螺旋缠绕在SCSC电缆中的影响，我们在较小的交流横向磁场下，根据计算出的磁化损耗的频率依赖性确定了它们的耦合时间常数。此外，