Abstract
The no-insulation-type (NI-type) high-temperature superconductor (HTS) magnet is considered a new and innovative concept for superconducting rotating machines, and it is possible to make an electrically and thermally robust magnet. The purpose of this paper is to investigate the NI-type HTS field magnet performance for superconducting rotating machines. First, specification data for a superconducting rotating machine were acquired based on electromagnetic analysis. Based on the data, the wire type, coil shape, field magnet, and armature were designed. The detailed structure of the NI-type HTS field magnet was designed using a 3-D CAD program. The performance of the NI-type HTS field magnet was tested under charge-discharge and overcurrent conditions. The NI-type HTS field magnet proposed in this paper operated well. Based on the field magnet data, an NI-type HTS field magnet-based superconducting rotating machine was fabricated. The signal condition and generating power of the fabricated HTS rotating machine were examined.
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