Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/591431
Title: AC Losses and Their Thermal Effect in High-Temperature Superconducting Machines
Authors: Xiaowei Song;Nenad Mijatovic;Shengnan Zou;Bogi Bech Jensen;Joachim Holbøll
subject: AC losses|thermal stability|finite element methods|homogenization|superconducting machines
Year: 2016
Publisher: IEEE
Abstract: In transient operations or fault conditions, high-temperature superconducting (HTS) machines suffer ac losses, which have an influence on the thermal stability of superconducting windings. In this paper, a method to calculate ac losses and their thermal effect in HTS machines is presented. The method consists of three submodels that are coupled only in one direction. The magnetic field distribution is first solved in a machine model, assuming a uniform current distribution in HTS windings. The magnetic fields on the boundaries are then used as inputs for an ac loss model that has a homogeneous approximation and solves the H formulation. Afterward, the computed ac losses are considered as the heat source in a thermal model to study the temperature profile in HTS windings. The method proposed is able to evaluate ac losses and their thermal effect, thus providing a reference to design an HTS machine and its cooling system.
URI: http://localhost/handle/Hannan/174040
http://localhost/handle/Hannan/591431
ISSN: 1051-8223
1558-2515
volume: 26
issue: 4
Appears in Collections:2016

Files in This Item:
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Title: AC Losses and Their Thermal Effect in High-Temperature Superconducting Machines
Authors: Xiaowei Song;Nenad Mijatovic;Shengnan Zou;Bogi Bech Jensen;Joachim Holbøll
subject: AC losses|thermal stability|finite element methods|homogenization|superconducting machines
Year: 2016
Publisher: IEEE
Abstract: In transient operations or fault conditions, high-temperature superconducting (HTS) machines suffer ac losses, which have an influence on the thermal stability of superconducting windings. In this paper, a method to calculate ac losses and their thermal effect in HTS machines is presented. The method consists of three submodels that are coupled only in one direction. The magnetic field distribution is first solved in a machine model, assuming a uniform current distribution in HTS windings. The magnetic fields on the boundaries are then used as inputs for an ac loss model that has a homogeneous approximation and solves the H formulation. Afterward, the computed ac losses are considered as the heat source in a thermal model to study the temperature profile in HTS windings. The method proposed is able to evaluate ac losses and their thermal effect, thus providing a reference to design an HTS machine and its cooling system.
URI: http://localhost/handle/Hannan/174040
http://localhost/handle/Hannan/591431
ISSN: 1051-8223
1558-2515
volume: 26
issue: 4
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7406724.pdf781.85 kBAdobe PDFThumbnail
Preview File
Title: AC Losses and Their Thermal Effect in High-Temperature Superconducting Machines
Authors: Xiaowei Song;Nenad Mijatovic;Shengnan Zou;Bogi Bech Jensen;Joachim Holbøll
subject: AC losses|thermal stability|finite element methods|homogenization|superconducting machines
Year: 2016
Publisher: IEEE
Abstract: In transient operations or fault conditions, high-temperature superconducting (HTS) machines suffer ac losses, which have an influence on the thermal stability of superconducting windings. In this paper, a method to calculate ac losses and their thermal effect in HTS machines is presented. The method consists of three submodels that are coupled only in one direction. The magnetic field distribution is first solved in a machine model, assuming a uniform current distribution in HTS windings. The magnetic fields on the boundaries are then used as inputs for an ac loss model that has a homogeneous approximation and solves the H formulation. Afterward, the computed ac losses are considered as the heat source in a thermal model to study the temperature profile in HTS windings. The method proposed is able to evaluate ac losses and their thermal effect, thus providing a reference to design an HTS machine and its cooling system.
URI: http://localhost/handle/Hannan/174040
http://localhost/handle/Hannan/591431
ISSN: 1051-8223
1558-2515
volume: 26
issue: 4
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7406724.pdf781.85 kBAdobe PDFThumbnail
Preview File