Abstract
In order to utilize MgB2 wires in AC electrical devices, it is very important to be able to understand the characteristics of MgB2 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 MgB2 wires. This method is based on solving a set of partial differential equations in which the magnetic field is used as the unknowns to get the current and electric field distributions in the cross sections of the wires, and hence the AC loss can be calculated. A commercial FEM solver is used to give an easy and fast solution for many complex geometries. This method is used to model a monocore MgB2 wire and a multifilamentary MgB2 wire. The results demonstrate that the multifilamentary MgB2 wire has a lower AC loss than monocore one when carrying the same amount of current.
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References
Nagamatsu, J., Nakagawa, N., Muranaka, T., Zenitani, Y., Akimitsu, J.: The origin of multiple superconducting gaps in MgB2. Nature 63, 410 (2001)
Musenich, R., Fabbricatore, P., Farinon, S., Greco, M., Modica, M., Marabotto, R., Penco, R., Razeti, M., Nardelli, D.: The behaviour of cryogen-free MgB2 react and wind coils. Supercond. Sci. Technol. 19, 126 (2006)
Tomsic, M., Rindfleisch, M., Yue, J., McFadden, K., Dolla, D., Phillips, J., Sumption, M.D., Bhatia, M., Bohnenstiehl, S., Collings, E.W.: Development of MgB2 wires and magnets using in situ strand fabrication method. Physica C 456, 203 (2007)
Grant, P.: Potential electric power applications for MgB2 conductors. Mater. Res. Soc. Symp. Proc. 689, 3–9 (2001)
Norris, W.T.: Calculation of hysteresis losses in hard superconductors carrying AC: isolated conductors and edges of thin sheets. J. Phys. D: Appl. Phys. 3, 489–507 (1970)
Brandt, E.H., Indenbom, M.: Type-II superconductor strip with current in a perpendicular magnetic field. Phys. Rev. B 17, 48 (1993)
Amemiya, N., Murasawa, S., Banno, N., Miyamoto, K.: Numerical modelings of superconducting wires for AC loss calculations. Phys. Rev. C 310, 16–29 (1998)
Ashworth, S.P., Suenaga, M.: AC losses due to magnetic fields and transport currents. IEEE Trans. Appl. Supercond. 15, 2 (2005)
Hong, Z., Campbell, A.M., Coombs, T.A.: Numerical solution of critical state in superconductivity by finite element software. Supercond. Sci. Technol. 19, 1246–1252 (2006)
Ye, L., Majoros, M., Campbell, A.M., Coombs, T.A., Harrison, S., Sargent, P., Haslett, M., Husband, M.: Investigations of current limiting properties of the MgB2 wires subjected to pulse overcurrents in the benchtop tester. Supercond. Sci. Technol. 20, 320–326 (2007)
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Hong, Z., Ye, L., Majoros, M. et al. Numerical Estimation of AC Loss in MgB2 Wires in Self-field Condition. J Supercond Nov Magn 21, 205–211 (2008). https://doi.org/10.1007/s10948-008-0319-y
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DOI: https://doi.org/10.1007/s10948-008-0319-y