Numerical analysis of AC losses in YBCO coated conductor in external magnetic field

Ichiki, Y.; Ohsaki, Hiroyuki

doi:10.1016/j.physc.2004.01.122

Cited by 61 publications

(62 citation statements)

References 4 publications

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“…Two numerical models were used in the analysis: one-dimensional FEM model to calculate the current distribution across an YBCO coated conductor [8,17] and two-dimensional FEM model to calculate the current distribution in the wide face of a finite-length multifilamentary YBCO coated conductor [18]. Using the one-dimensional model, the magnetization loss of monolithic conductor and completely decoupled multifilamentary conductor can be calculated.…”

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 governing equation of a one-dimensional model for an axially uniform flat conductor that is exposed to a uniform magnetic field B 0 is given as follows: 7,21 1D , and Q mono,1D are calculated using this governing equation. When calculating Q f,1D , is set at sc , as given by Eq.…”

Section: Acknowledgmentmentioning

confidence: 99%

Magnetic flux penetration into twisted multifilamentary coated superconductors subjected to ac transverse magnetic fields

Amemiya

Sato

Ito

2006

Journal of Applied Physics

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ac losses in superconductors are generated by the magnetic flux and current penetration into them. To reveal the magnetic flux and current penetration processes in twisted multifilamentary coated superconductors in which the thin superconductor layer is subdivided into filaments and then twisted as a whole for ac loss reduction, a theoretical model for electromagnetic field analysis was developed based on the power law E-J (electric-field–current-density) characteristic for the superconductor and a thin strip approximation of the conductor. The developed theoretical model was implemented into a numerical code using the finite element method to calculate and visualize the current and magnetic flux distributions. The magnetization losses in twisted multifilamentary coated superconductors exposed to ac transverse magnetic fields were calculated from the temporal evolutions of the current distribution to demonstrate the effect of the twisted multifilamentary architecture on ac loss reduction.

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“…A possible FEM approach is to 'approximate' the thin strip by increasing its thickness and thus decreasing artificially the aspect ratio of the conductor by a factor of 10 to 1000 [5], [6]. Another possibility is to treat the problem as one-dimensional and in this way to avoid creating a 2D region and FEM mesh in the y-direction for the YBCO strip [7], and we have employed a similar approach.…”

Section: Numerical Modellingmentioning

confidence: 99%

Finite-element analysis and comparison of the AC loss performance of BSCCO and YBCO conductors

Stavrev

Grilli

Dutoit

et al. 2006

J. Phys.: Conf. Ser.

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Abstract. The AC loss performance of two BSCCO and two YBCO conductors of different geometry, characterized by the same self-field critical current of 150 A, is analysed and compared quantitatively. The comparison is made using the finite-element method with a nonlinear B-dependent E-J relation. A new shell-region model is utilised for the simulations of thin YBCO strips. Different AC working conditions are simulated: self-field, applied external field, and combined transport current and external perpendicular field application. Magnetic field and current density profiles are investigated in order to illustrate the reasons for the loss difference in the conductors. Depending on the application, the advantages of using BSCCO or YBCO conductors with specific geometry are outlined.

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Numerical analysis of AC losses in YBCO coated conductor in external magnetic field

Cited by 61 publications

References 4 publications

AC Loss Characterization of Striated Multifilamentary YBCO Coated Conductors

AC Loss Characterization of Striated Multifilamentary YBCO Coated Conductors

Magnetic flux penetration into twisted multifilamentary coated superconductors subjected to ac transverse magnetic fields

Finite-element analysis and comparison of the AC loss performance of BSCCO and YBCO conductors

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