AC loss analysis of a HTS coil with parallel superconducting tapes of unbalanced current distribution

Lee, S.; Byun, S.B.; Kim, W.; Choi, Kyeongdal; Lee, H.

doi:10.1016/j.physc.2007.03.489

Cited by 9 publications

(3 citation statements)

References 3 publications

(3 reference statements)

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“…It is therefore interesting to utilise the geometry of horizontally parallel HTS tapes (shown in figure 1, sometime also indicated as x-array), which is a proper way to prevent the high AC losses, due to the reduction of the perpendicular component of the magnetic field experienced by the tapes. The parallel HTS tape structure has been reported to potentially reduce the total AC losses in HTS power application such as superconducting transformers [13].…”

Section: Introductionmentioning

confidence: 99%

“…Jiang et al measured the transport AC losses in single and double layer parallel HTS tape arrays [17]. Lee et al investigated the AC loss of parallel tapes with unbalanced current distribution [13]. Ogawa et al measured and simulated the AC losses from an assembled conductor whose configuration was built as parallel HTS tapes [18].…”

Section: Introductionmentioning

confidence: 99%

“…Figure13. Normalised ratio of total average AC losses per tape over the single tape AC losses from Stage 1 numerical estimation calculated using Equation (11) and (12) (cases of 11, 51, 101, 201 parallel tapes), also compared with the COMSOL simulation of 11 parallel tapes case.…”

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confidence: 99%

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Investigation of AC losses in horizontally parallel HTS tapes

Shen

Geng

et al. 2017

Supercond. Sci. Technol.

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This paper presents an AC loss study of horizontally parallel HTS tapes. We proposed to use three parallel HTS tapes as an example. The AC losses of the middle and end tape of three parallel tapes have been measured using the electrical method and compared to those of an individual tape. The effect of the interaction between tapes on AC losses has been analysed, and compared with finite-element method (FEM) simulations using the 2D H-formulation implemented in COMSOL Multiphysics. By using FEM simulations, the cases of increasing number of parallel tapes have been considered, and the normalised ratio between the total average AC losses per tape and the AC losses of an individual single tape has been calculated for different gap distances. We proposed a new parameter, N s , a turning point for number of tapes, to divide Stage 1 and Stage 2 for the AC loss study of horizontally parallel tapes. For Stage 1, N < N s , the total average losses per tape increased with the increasing number of tapes. For Stage 2, N > N s , the total average losses per tape started to decrease with the increasing number of tapes. The analysis demonstrates that horizontally parallel HTS tapes could be potentially used into superconducting devices like HTS transformer, which could retain or even reduce the total average AC losses per tape with large number of parallel tapes.

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Section: Introductionmentioning

confidence: 99%