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

Autor:	Hiroshi Ueda, Hideaki Maeda, Yu Suetomi, Yoshinori Yanagisawa
Rok vydání:	2022
Předmět:	Materials Chemistry Metals and Alloys Ceramics and Composites Electrical and Electronic Engineering Condensed Matter Physics
Zdroj:	Superconductor Science and Technology. 35:054001
ISSN:	1361-6668 0953-2048
DOI:	10.1088/1361-6668/ac4b9e
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e623fb7e63fc445e3bc71de1b08e8473 https://doi.org/10.1088/1361-6668/ac4b9e Zobrazit plný text záznamu