Numerical modelings of superconducting wires for AC loss calculations

Amemiya, Naoyuki; Murasawa, Shun-ichi; Banno, N.; Miyamoto, Koichi

doi:10.1016/s0921-4534(98)00427-4

Cited by 219 publications

(136 citation statements)

References 12 publications

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“…Using the two-dimensional model, the magnetization loss of multifilamentary conductor at partially decoupled state can be calculated: frequency-dependent AC loss characteristics of multifilamentary conductor can be studied. In both models, the superconducting property was given by a power law E-J characteristic [19], where r is the vector from the source point to the field point, and n is the normal vector to the wide face of the conductor. The two-dimensional region for analysis in the wide face of a finite-length YBCO coated conductor is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

AC Loss Characterization of Striated Multifilamentary YBCO Coated Conductors

Amemiya¹

2005

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Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. The transverse resistances between filaments in the measured samples were determined through the comparison between the measured and calculated magnetization losses at small field amplitude. The magnetization losses calculated in a wide range of field amplitude using these transverse resistances reasonably agree with the measured magnetization losses. SUBJECT TERMS

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Section: Methodsmentioning

confidence: 99%

AC Loss Characterization of Striated Multifilamentary YBCO Coated Conductors

Amemiya¹

2005

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“…The results were qualitatively explained. Furthermore, the result from this study on the characteristics superconducting and normal conducting phase changes of YBCO thin-film wires are expected to be useful in designing superconducting power machines and in improving their performance [3,4].…”

Section: Introductionmentioning

confidence: 99%

Study on Current Limiting Characteristics of YBCO Thin-Film Wire with Insulation Layer

Seung-Gyu¹,

Ho-Ik²,

An-Gyoon³

2013

Transactions on Electrical and Electronic Materials

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When applying superconducting wire to power machines, an investigation needs to be carried out on the characteristics of wire phase changes in connection with the insulating layer. This study examined trends in the increase of the wire's resistance and the characteristics of its recovery from quenching by a current-applied cycle at temperatures of 90 K, 180 K, and 250 K. The procedure was conducted based on the thickness and presence (or absence) of the insulating wire layers. To achieve this, YBCO thin-film wires with the same critical temperatures were prepared with copper and stainless steel stabilizing layers. At levels (-one, three, and five-), with superior performance, polyimide pressure-sensitive adhesive tape was attached to the wires at a very low temperature. The eight prepared test samples were wound around the linear frames. The wire's voltage and current created from the phase change characteristics were measured at the wire's prescribed temperature, using the four-point probe method. The wire's resistance and recovery characteristics were examined for each cycle at temperatures of 90 K, 180 K, and 250 K.

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“…Recently, finite element method (FEM) has been intensively applied to develop the numerical solutions of the AC loss problem in superconductors. Some 2D and 3D FEM models, based on the critical-state model, have been proposed to solve the AC loss in superconducting cables [3,4].…”

Section: Introductionmentioning

confidence: 99%

A two-dimensional finite element method to calculate the AC loss in superconducting cables, wires and coated conductors

Hong

Ye²,

Jiang

et al. 2008

J. Phys.: Conf. Ser.

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Abstract. In order to utilize HTS conductors in AC electrical devices, it is very important to be able to understand the characteristics of HTS materials in the AC electromagnetic conditions and give an accurate estimate of the AC loss. A numerical method is proposed in this paper to estimate the AC loss in superconducting conductors including MgBB 2 wires and YBCO coated conductors. This method is based on solving a set of partial differential equations in which the magnetic field is used as the state variable to get the current and electric field distributions in the cross sections of the conductors and hence the AC loss can be calculated. This method is used to model a single-element and a multi-element MgB 2 B wires. The results demonstrate that the multi-element MgBB 2 wire has a lower AC loss than a single-element one when carrying the same current. The model is also used to simulate YBCO coated conductors by simplifying the superconducting thin tape into a one-dimensional region where the thickness of the coated conductor can be ignored. The results show a good agreement with the measurement.

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Numerical modelings of superconducting wires for AC loss calculations

Cited by 219 publications

References 12 publications

AC Loss Characterization of Striated Multifilamentary YBCO Coated Conductors

AC Loss Characterization of Striated Multifilamentary YBCO Coated Conductors

Study on Current Limiting Characteristics of YBCO Thin-Film Wire with Insulation Layer

A two-dimensional finite element method to calculate the AC loss in superconducting cables, wires and coated conductors

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