Electrical Characteristics of HTS Coils With and Without Insulation in a Layer-Wound Configuration
| Autor: | G. Angeli, M. Ascade, M. Bocchi, A. Valzasina, V. Rossi, Marco Breschi, Pier Luigi Ribani, Andrea Musso |
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| Přispěvatelé: | Andrea Musso , Giuliano Angeli , Massimo Ascade, Marco Bocchi, Pier Luigi Ribani , Valerio Rossi, Angelo Valzasina, Marco Breschi |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
High-temperature superconductivity Physics::Medical Physics Contact resistance Joule effect Mechanics Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Power (physics) Transverse plane law Electromagnetic coil Electrical network Electrical and Electronic Engineering No-insulation coils Superconducting coils Layerwound technique Current distribution High Temperature Superconductors Voltage |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 31:1-5 |
| ISSN: | 2378-7074 1051-8223 |
| DOI: | 10.1109/tasc.2021.3059971 |
| Popis: | This paper analyses the current distribution in no-insulation (NI) coils in a layer-wound configuration. The investigation aims at comparing the electrical characteristic of two coils wound from the same BSCCO tape, with or without electrical insulation between turns. Both coils are characterized by a very similar geometry, with the same number of turns and layers. Both coils, cooled in liquid nitrogen bath, are charged until the tape critical current is exceeded. To interpret the measurements and analyze the current distribution within the winding, a lumped-parameter equivalent electrical circuit is developed and solved numerically in a time-varying regime. The model results are compared with the signals acquired through voltage taps soldered at the same locations in both coils. Finally, the model is applied to investigate the impact of the transverse contact resistance and to estimate the most stressed locations of the coil during charging, in terms of power produced by Joule effect. |
| Databáze: | OpenAIRE |
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