MT27, 27th International Conference on Magnet Technology

Current Bypass of a Metal Stitching Smart Insulation 2G HTS Coil

WED-PO2-616-02

Nov 17, 2021, 10:30 AM

2h

Fukuoka Convention Center

Poster WED-PO2-616 Electrical Insulation for Magnets

Speaker

Hyung-Wook Kim (Korea Electrotechnology Research Institute)

Description

This study analyzes the current bypass mechanism of a metal stitching smart insulation (SI) coil rolled by coating vanadium oxide (V2O3) on a metal stitching wire prepared by generating micro-holes into a second generation (2G) high-temperature superconducting (HTS) wire using a laser and by filling the micro-holes with metal solder material. Results showed that the metal stitching wire with laser-generated holes had a noticeably lower Ic loss due to damage and low turn-to-turn resistance. This facilitated the current bypass at the transient state of the SI 2G HTS coil. For effective analysis, the metal stitching SI coil was compared with a non-metal stitching SI coil, and the positive effect of the metal stitching apart from current bypass was discussed and analyzed.