Abstract
A high-temperature superconductor (HTS) field coil with a novel, step-shaped cross section is proposed for large-capacity superconducting machine applications. The design of the structure is explained in detail, and comparisons are made with conventional coils. The electromagnetic characteristics are also analyzed in comparison with the conventional alternative. From the analysis, the overlapping topology can reduce the volume of the generator and achieve better electromagnetic characteristics by eliminating the magnetic flux sag produced by the adjacent field coils, while also decreasing the iron loss.
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