Effect of winding pitches on dynamic resistance of CICC made from CORCs

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2025-03-12 DOI:10.1016/j.physc.2025.1354681

Liguang Hu , Xuhui Xu , Bibo Zhou , Xian Chen , Qi Cheng , Bangzhu Wang , Junhua Cheng

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引用次数: 0

Abstract

The second generation (2G) high temperature superconducting (HTS) REBCO tapes, presently a unique possible candidate for use in future large high field magnets above 25 T, are promising choice for high capacity current cable-in-conduit conductor (CICC) used in large high field magnets of fusion and power transmissions. Generally, HTS based CICCs are made from several HTS cables or strands consisting of individual REBCO tapes. A configuration of CICC is proposed, which is made from six conductor on round core cables (CORCs) with symmetrically helical winding on a petal copper former. The cooling medium flows in central channels of former and six CORCs, respectively. Although the CICCs generally operate in DC mode, they inevitable endure AC influence at least in charging and discharging process or even ripple current. Consequently, the dynamic resistance appears, which not only generates additional AC loss but also importantly causes nonuniform current distribution and instability. This paper employs analytical model and numerical simulations to investigate the dynamic resistance characteristics of CORC and CICC conductors with different winding pitches respectively. An analytical model is established based on the rotating magnetic field method to efficiently compute the dynamic resistance of single-layer CORC and CICC. Subsequently, three-dimensional (3D) models of CORC and CICC with different winding pitches are established. Using finite element method, the influence of winding pitches on dynamic resistance are calculated based on the T-A formulation. Numerical simulation results are consistent with analytical calculations, demonstrating that winding pitch has a significant impact on dynamic resistance. This study can provide valuable reference for the design of large-scale high field magnets.

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来源期刊

Physica C-superconductivity and Its Applications 物理-物理：应用

CiteScore

2.70

自引率

11.80%

发文量

102

审稿时长

66 days

期刊介绍： Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.