Open Source Codes for Computing the Critical Current of Superconducting Devices

Abstract

In order to transport sufficiently high current, high-temperature superconductor (HTS) tapes are assembled in cable structures of different forms. In such cables, the tapes are tightly packed and have a strong electromagnetic interaction. In particular, the generated self-field is quite substantial and can give an important contribution in reducing the maximum current the cable can effectively carry. In order to be able to predict the critical current of said cable structures, a static numerical model has been recently proposed. In this contribution, we present in detail the implementation of such models in different programming environments, including finite-element-based and general numerical analysis programs, both commercial an open-source. A comparison of the accuracy and calculation speed of the different implementations of the model is carried out for the case of a Roebel cable. The model is also used to evaluate the importance of choosing a very accurate description of the angular Jc(B) dependence of the superconductor as input for the material's property. The numerical codes, which are open-source, are made freely available to interested users.

arXiv commentThe accompanying models descried in this work are available for free download at the HTS modeling workgroup under http://www.htsmodelling.com/?p=917

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Cited by in corpus (4)

• 3D modelling of macroscopic force-free effects in superconducting thin films and rectangular prisms
• Estimation of maximum possible trapped field in superconducting permanent magnets in 2D and 3D
• Three-dimensional electromagnetic modeling of practical superconductors for power applications
• Estimation of Self-Field Critical Current and Transport-Magnetization AC Losses of Roebel Cables