Preliminary Design Study on Non-Twisted HTS Conductor for Fusion Applications

Oh, Sangjun; Kim, Hyun Wook; Nam, Seokho; Chu, Yong; Oh, Dong Keun; Choi, Hyung Rim; Lee, J. T.; Kim, W.; Jeong, Y. S.; Chang, Hyuk; Lee, Jiho; Hahn, Seungyong

doi:10.1109/tasc.2023.3262490

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Instead, the stability of HTS is much higher than LTS, HTS conductors can be made of non-twisted tapes, such as non-twisted stacked tapes assembled in rigid structure [17] and Quasi-Isotropic strand [18]. Nevertheless, twisting, as an approach to reducing inductance mismatch, improving even current distribution in tapes and reducing AC loss, is employed to enhance the performance of HTS conductors [19]. However, recent studies showed that non-twisted HTS cables' inductance variation is typically less than 2%, which results in slight effect of uneven current distribution, and the reduction by twisting is less than 36% in terms of ac loss for HTS cables [6].…”

Section: Introductionmentioning

confidence: 99%

A newly developed 10 kA-level HTS conductor: innovative tenon-mortise-based modularized conductor (TMMC) based on China ancient architecture

Zheng,

Cheng,

Wang

et al. 2024

Supercond. Sci. Technol.

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We propose a new type of high-temperature superconducting (HTS) conductor concept: modularized conductors (MC) connected by Chinese traditional tenon-mortise (TM) connection structure, reffered as TMMC. The conductor consists of multiple concentric round sub-conductors with slots for stacking REBCO tapes. Innovatively, the REBCO stacks in the adjacent sub-conductors are arranged with the fully-misaligned configuration to enhance the critical current’s isotropy with respect to magnetic field and reduce ac loss. For example, the angle between the adjacent stacks in the two adjacent sub-conductors is 45o if each sub-conductor contains 4 REBCO stacks. In order to construct the fully-misaligned configuration, the sub-conductors are designed with two open half-circular formers and connected by tenon-mortise structure which makes the conductor modulrized and simply to assembly and disassembly. Based on the design concept, a prototype conductor containing 160 REBCO tapes distributed in the four concentric sub-conductors is fabricated. The conductor’s measured critical current is 13.69 kA at 77 K and sefl-field, which is consistent to the simulaiton result. In order to further improve the TMMC’s engineering critical current density (Jce) and bending performance, we propose two enhancement approaches: reducing the former’s thickness and re-arrange stacks in the outer sub-conductors. With the enhancements, both TMMC’s radius and Jce are comparable to the existing slotted-core conductor. The study shows the TMMC’s advantages of non-twisted structures, easy assembly, high-current carrying and low ac losses, which makes it promising for constructing large-scale scientific devices.

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