Numerical evaluation of measured AC loss in HTS tape in AC magnetic field carrying AC transport current

Fukui, Satoshi; Tonsho, Hiroyuki; Nakayama, Hiroyuki; Yamaguchi, M.; Torii, S.; Ueda, Ken–ichi; Takao, T.

doi:10.1016/s0921-4534(03)01075-x

Cited by 10 publications

(11 citation statements)

References 3 publications

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“…Therefore, the AC loss characteristic of the HTS of the HTS assembled conductor should be evaluated relating to the conductor geometrical configuration. In our previous study, we have developed a numerical model to calculate the AC loss in the HTS tapes [3], [4]. The validity of the model for the AC loss calculation of a Bi2223 HTS tape carrying AC transport current in AC external magnetic field has been demonstrated by the comparison with the measured data.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of AC Loss Characteristics of Cable Conductor Assembled by HTS Tapes in Polygonal Arrangement

Fukui

Kojima

Ogawa

et al. 2006

IEEE Trans. Appl. Supercond.

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Numerical studies on AC loss characteristic of a assembled conductors of multiple HTS tapes with high aspect ratio simulating YBCO tape in polygonal arrangement were presented in this paper. We developed a numerical model to analyze the AC loss in the HTS tape in the polygonally assembled conductor based on our previously developed model. The relations between the geometrical configuration and the AC loss properties of the conductor were made clear by the numerical simulation. The numerical results give the important information for the design of the cable conductor assembled by the HTS tapes with high aspect ratio such as YBCO tapes.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of AC Loss Characteristics of Cable Conductor Assembled by HTS Tapes in Polygonal Arrangement

Fukui

Kojima

Ogawa

et al. 2006

IEEE Trans. Appl. Supercond.

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“…The total AC loss in the tape is calculated by the numerical model described in the next section. [3], [4] Since the AC self and external magnetic fields electromagnetically couple the superconducting filaments in the tape, it is 1051-8223/$20.00 © 2005 IEEE TABLE I SPECIFICATIONS OF HTS COIL AND TAPE reasonable to model the filamentary region of the tape as a mixture of superconductor and normal metal in this analysis [5]. The transport current flows in the direction of the tape axis and the external AC magnetic field is applied perpendicular to the tape axis.…”

Section: Methodsmentioning

confidence: 99%

“…The relation defined locally in the superconducting filamentary region represented with a power law is used. (4) where is the critical current density at ( in this analysis). With the calculated current density and electric field distribution in the tape, is obtained by integrating over the cross-section of the tape and one AC cycle.…”

Section: B Ac Loss In Hts Tapementioning

confidence: 99%

“…In Fig. 4(a), the estimated AC loss in the coil A by the summation of the magnetization loss without the AC transport current measured on the short sample tape [4] is also shown. To compare the calculated AC losses in the coils with the measured data, the electromagnetic losses in the coils are obtained by subtracting the mechanical loss estimated by the method given in [1] from the measured total AC losses.…”

Section: A Ac Loss In Coil a And Coil B 1) Profile Of Ac Loss Densitmentioning

confidence: 99%

“…The AC losses of the tape in the AC coil are caused by this AC transport current and external AC magnetic field. In our previous study [5], a method to approximately estimate the electromagnetic AC loss in the HTS coil based on the numerical model of the AC loss in HTS tapes [3], [4] has been proposed.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of AC Loss Characteristics of High Temperature Superconducting Coil

Fukui

Tonsho

Toyoda

et al. 2005

IEEE Trans. Appl. Supercond.

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This paper reports an analytical study on AC loss characteristics of a high temperature superconducting coil wound with a Bi2223/Ag tape. The electromagnetic AC loss in the high temperature superconducting coil made by stacking pancake coils wound with the Bi2223/Ag tape was numerically calculated by using the measured DC data of the HTS tape. The calculated AC loss was compared with measured AC losses in Bi2223 HTS coils obtained in a previous study. It had been found that the measured AC losses in the coils contained large mechanical loss. For the comparison of the measured and calculated losses, the mechanical loss was subtracted from the measured total loss data to estimate the electromagnetic loss. The calculated AC losses were compared with the measured electromagnetic losses in the coils, producing rather good agreement. A possible way to reduce the AC loss in the HTS coil was also presented and discussed.

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Simulation of High Temperature Superconductors and experimental validation

Olm

Badia

Martı́n

2019

Computer Physics Communications

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In this work, we present a parallel, fully-distributed finite element numerical framework to simulate the low-frequency electromagnetic response of superconducting devices, which allows to efficiently exploit HPC platforms. We select the so-called H-formulation, which uses the magnetic field as a state variable. Nédélec elements (of arbitrary order) are required for an accurate approximation of the H-formulation for modelling electromagnetic fields along interfaces between regions with high contrast medium properties. An h-adaptive mesh refinement technique customized for Nédélec elements leads to a structured fine mesh in areas of interest whereas a smart coarsening is obtained in other regions. The composition of a tailored, robust, parallel nonlinear solver completes the exposition of the developed tools to tackle the problem. First, a comparison against experimental data is performed to show the availability of the finite element approximation to model the physical phenomena. Then, a selected state-of-the-art 3D benchmark is reproduced, focusing on the parallel performance of the algorithms.

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Numerical evaluation of measured AC loss in HTS tape in AC magnetic field carrying AC transport current

Cited by 10 publications

References 3 publications

Numerical Analysis of AC Loss Characteristics of Cable Conductor Assembled by HTS Tapes in Polygonal Arrangement

Numerical Analysis of AC Loss Characteristics of Cable Conductor Assembled by HTS Tapes in Polygonal Arrangement

Analysis of AC Loss Characteristics of High Temperature Superconducting Coil

Simulation of High Temperature Superconductors and experimental validation

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