Experiment and numerical simulation of the combined effect of winding, cool-down, and screening current induced stresses in REBCO coils

Hiroshi Ueda, Hideaki Maeda, Yu Suetomi, Yoshinori Yanagisawa

Research output: Contribution to journalArticlepeer-review

Abstract

This paper overviews the combined effects of winding, cool-down, and screening current-induced stresses in REBCO coils. First, a simulation method to model the circumferential stress modification effect due to the screening-current is overviewed. The simulation includes coil winding, cooling down, and coil charge up to the operating current. Second, we will compare the numerical simulation results with the experimental results. The numerical simulations for a dry coil and an epoxy impregnated coil agree well with the experimental results. Third, the enhanced circumferential stress did not degrade the performance of a dry winding REBCO coil, but the improved increased compressive stress buckled the coil structure. Finally, it is demonstrated that epoxy impregnation has beneficial effects in reducing the stress modification effect. However, the circumferential stress is enormously enhanced at the coil ends, sometimes resulting in degradation of the coil performance.

Original languageEnglish
Article number054001
JournalSuperconductor Science and Technology
Volume35
Issue number5
DOIs
Publication statusPublished - May 1 2022

Keywords

  • combined effect
  • mechanical stress
  • REBCO magnet
  • screening current

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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