Modeling of magnetization curves of partially coupled superconducting filaments with dependence of current density according to applied magnetic field

Satiramatekul, Thitipong; Bouillault, Frédéric; Santandréa, Laurent

doi:10.1109/tmag.2006.870928

Cited by 5 publications

(2 citation statements)

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“…In the case of Kim's model, the deformation is more important at high magnetic flux densities than at low magnetic flux densities. This deformation is due to the current density distribution in the filaments [4].…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

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Magnetization Modeling of Twisted Superconducting Filaments

Satiramatekul

Bouillault

Devred

et al. 2007

IEEE Trans. Appl. Supercond.

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Abstract-This paper presents a new Finite Element numerical method to analyse the coupling between twisted filaments in a superconducting multifilament composite wire. To avoid the large number of elements required by a 3D code, the proposed method makes use of the energy balance principle in a 2D code. The relationship between superconductor critical current density and local magnetic flux density is implemented in the program for the Bean and modified Kim models. The modeled wire is made up of six filaments twisted together and embedded in a low-resistivity matrix. Computations of magnetization cycle and of the electric field pattern have been performed for various twist pitch values in the case of a pure copper matrix. The results confirm that the maximum magnetization depends on the matrix conductivity, the superconductor critical current density, the applied field frequency, and the filament twist pitch. The simulations also lead to a practical criterion for wire design that can be used to assess whether or not the filaments are coupled.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

“…By using the principle of energy balance [4] in the plane in Fig. 1, we derive (4) where is the power dissipated in a section of conducting matrix.…”

Section: Twisted Wire Modelmentioning

confidence: 99%