Numerical Research of Potential Methods to Reduce Screening-Current-Induced Stress for No-Insulation REBCO Coils

doi:10.1109/TASC.2022.3171260

	Numerical Research of Potential Methods to Reduce Screening-Current-Induced Stress for No-Insulation REBCO Coils
	Jiang, Zhaofei; Jiang, Donghui; Wu, Xiangyang; Chen, Wenge; Kuang, Guangli
刊名	IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
	2022-08-01
卷号	32
关键词	Coils Numerical models Superconducting magnets High-temperature superconductors Windings Magnetic fields Stress Metal as insulation no-insulation REBCO (NI-REBCO) coils screening-current-induced stress winding tension
ISSN号	1051-8223
DOI	10.1109/TASC.2022.3171260
通讯作者	Jiang, Zhaofei(jzhaofei@hmfl.ac.cn) ; Kuang, Guangli(kuang_gl@ipp.ac.cn)
英文摘要	In recent years, the no-insulation REBa2Cu3O7-x (REBCO) (NI-REBCO) coils with self-protecting ability show remarkable attraction and potential in high magnetic field areas. As the study develops in-depth, it is widely recognized that the uneven stress/strain generated by screening current is a crucial concern for the NI-REBCO coils operating performance, especially for NI-REBCO insert coils under high background field. Therefore, effectively reducing screening-current-induced stress/strain (SCIS) is critical for NI-REBCO coils/magnet mechanical design and steady operation. In this article, we developed a new two-dimensional numerical model to analyze the mechanical responses caused by screening current in NI-REBCO coils using the T-A multiscale model for electromagnetic behavior and discrete contact model for stress/strain analysis. After verifying the model by comparing with previous experimental data, the effectiveness of three already-reported and potential methods of mitigating SCIS [i.e., 1) combining suitable winding tension and overband support in the fabrication of coils, 2) employing multifilamentary REBCO tape suppressing screening current, and 3) co-wound metal tape strengthening stiffness of coils] is revealed by comparing the strain/stress distribution with a designed benchmark NI-REBCO coils. Furthermore, by a parametric study of the aforementioned mitigating SCIS methods, a couple of novel conclusions were found. 1) The effect of overband support on reducing SCIS gradually weakens from the outer turn to the inner turn, and the SCIS decreases gradually as the overband metal tape thickness increases, whereas there is a critical value that the SCIS would no longer significantly decreases once exceeds it. 2) The more multifilaments in REBCO tape there are, the better the effect of mitigating SCIS. 3) The SCIS in NI-REBCO coils shows a clear decreasing trend with the increase of co-wound metal tape thickness, but the trend is gradually flattened. Finally, we summarized some feasible suggestions for the mechanical design of NI-REBCO coils to mitigate the SCIS.
资助项目	HFIPS Director's Fund[YZJJ2022QN34] ; Hefei Comprehensive National Science Center ; High Magnetic Field Laboratory of Anhui Province
WOS关键词	CONDUCTORS
WOS研究方向	Engineering ; Physics
语种	英语
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS记录号	WOS:000797419800002
资助机构	HFIPS Director's Fund ; Hefei Comprehensive National Science Center ; High Magnetic Field Laboratory of Anhui Province
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130895]
专题	中国科学院合肥物质科学研究院
通讯作者	Jiang, Zhaofei; Kuang, Guangli
作者单位	Chinese Acad Sci, Hefei Inst Phys Sci, High Magnet Field Lab, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Zhaofei,Jiang, Donghui,Wu, Xiangyang,et al. Numerical Research of Potential Methods to Reduce Screening-Current-Induced Stress for No-Insulation REBCO Coils[J]. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,2022,32.
APA	Jiang, Zhaofei,Jiang, Donghui,Wu, Xiangyang,Chen, Wenge,&Kuang, Guangli.(2022).Numerical Research of Potential Methods to Reduce Screening-Current-Induced Stress for No-Insulation REBCO Coils.IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,32.
MLA	Jiang, Zhaofei,et al."Numerical Research of Potential Methods to Reduce Screening-Current-Induced Stress for No-Insulation REBCO Coils".IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 32(2022).