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Influence of High Temperature Superconducting Transformer Geometry on Leakage Magnetic Field

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5 Author(s)
Xiaosong Li ; Changsha Univ. of Sci. & Technol., Changsha ; Suping Wu ; Yusheng Zhou ; Gui Hu
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Leakage magnetic fields in high temperature superconducting (HTS) transformer windings reduce the critical current and increase the ac losses in HTS tapes. Moreover, because of the anisotropic properties of the HTS tapes, the influence of the radial component of the leakage field on critical current and ac losses is much stronger than that of the axial one. For these reasons, leakage magnetic fields must be carefully considered in HTS transformer design. In this paper, we report a study of the influence of the core structure and the winding configuration on the leakage field by the finite-element method (FEM), and offer some suggestions for reducing the maximal radial component of leakage field to make the HTS transformer more efficient.

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Magnetics, IEEE Transactions on  (Volume:44 ,  Issue: 4 )