Numerical Electromagnetic Field Analyses of Dynamic Losses and Dynamic Resistances in Multilayered Spiral Copper-Plated Striated Coated-Conductor Cables

Spiral Copper-plated Striated Coated-conductor (SCSC) cables are anticipated to be a game-changer for ac applications of high-temperature superconducting technology due to their low ac losses and high robustness. Experiments and numerical electromagnetic field analyses have confirmed that the structure of SCSC cables is effective in reducing dynamic losses and dynamic resistances, which is a problem in flux pumps and rotating machines. However, these results were confirmed for a single copper-plated multifilament coated conductor in a spiral configuration. It remains unclear whether they hold true for SCSC cables with the multilayer structure required for practical current-carrying capacity. Particularly, there is concern that the effect of reducing the dynamic resistance of SCSC cables may be lost due to tape-to-tape interactions caused by an increase in the number of layers or the number of tapes within a layer. We evaluated this using numerical electromagnetic field analyses.