Circuit coupling method applied to bulk superconductors

Vinot, Emmanuel; Leconte, Vincent; Meunier, G.; Tixador, Pascal

doi:10.1109/tmag.2002.804802

Cited by 6 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerical ac losses calculations have been carried out. and are based on a SC model implemented in the finite element code FLUX3D [5] commercialized by CEDRAT [6]. The number of elementary tapes (166 using the symmetry) is large and would lead to very long computing times.…”

Section: A Primary Windingmentioning

confidence: 99%

Tests of a Bi/Y Transformer

Tixador¹,

Cointe²,

Trollier

et al. 2005

IEEE Trans. Appl. Supercond.

Self Cite

View full text Add to dashboard Cite

In the context of a European project (READY) we designed, constructed and tested a single phase transformer. The primary winding uses a PIT-Bi-2223 tape. The secondary is wound with two lengths (2 8 m) of YBCO coated conductor. With these two lengths in series, the secondary characteristics are 75 V-50 A at 77 K. We designed the transformer with an integrated refrigerator. The cooler is a high cooling capacity (100 W at 80 K) single stage coaxial pulse tube cooler (PTC) developed by Air Liquide. We chose a cold magnetic circuit with low iron loss FeSi sheets. The cryostat is then very simple with metallic vessels and only one interface with the PTC, and the cooling fluid is helium in order to investigate a wide temperature range (40-80 K). About 30 hours are required to reach 70 K from 300 K using only the PTC. This paper presents the transformer layout and some electrical tests (no load and short circuit tests). The ac losses are high in the PIT coil, but in good agreement with numerical simulations. In the YBCO coil the ac losses are lower and in good agreement with the Norris formula.

show abstract

Section: A Primary Windingmentioning

confidence: 99%

Tests of a Bi/Y Transformer

Tixador¹,

Cointe²,

Trollier

et al. 2005

IEEE Trans. Appl. Supercond.

Self Cite

View full text Add to dashboard Cite

show abstract

Thermal-electromagnetic modeling of superconductors

Tixador¹,

Gaatone²,

Chevalier³

et al. 2007

Cryogenics

View full text Add to dashboard Cite

2D axisymmetric electromagnetic modeling of HTS coils based on T-A formulation with modified Newman boundary conditions

Chen,

Wang,

Wang

et al. 2024

Supercond. Sci. Technol.

View full text Add to dashboard Cite

The T-A formulation based on thin film approximation has been widely used in electromagnetic modeling of high temperature superconducting (HTS) coated conductors (CCs). However, with the emergence of no-insulation (NI) HTS coils and its variant HTS coils, the electrical connection of HTS coils has become increasingly complex, and the traditional T-A formulation is challenging to handle the problems of conductors with non-negligible thickness and current sharing. This paper firstly describes the Neumann boundary condition of the T-A formulation under 2D axisymmetric symmetry in detail, as well as the conversion of different boundary conditions. And additional voltage variable is added to correct the Newman boundary condition from the perspective of circuit. Then, considering HTS CCs series or parallel stacking to carry current, the effectiveness of this method is verified by comparing with benchmark model. Finally, we extend the application range of the T-A formulation with modified Newman boundary conditions to simulate thick superconductors, and naturally process current sharing of azimuthal and radial current in circular NI HTS coils.

show abstract

Circuit coupling method applied to bulk superconductors

Cited by 6 publications

References 11 publications

Tests of a Bi/Y Transformer

Tests of a Bi/Y Transformer

Thermal-electromagnetic modeling of superconductors

2D axisymmetric electromagnetic modeling of HTS coils based on T-A formulation with modified Newman boundary conditions

Contact Info

Product

Resources

About