An efficient two dimensional T-A formulation based approach is proposed to calculate the electromagnetic characteristics of tape stacks and coils made of second generation high temperature superconductors. In the approach, a thin strip approximation of the superconductor is used in which the superconducting layer is modeled as a 1-dimensional domain. The formulation is mainly based on the calculation of the current vector potential in the superconductor layer and the calculation of the magnetic vector potential in the whole space, which are coupled together in the model. Compared with previous T-based models, the proposed model is innovative in terms of magnetic vector potential A solving, which is achieved by using the differential method, instead of the integral method. To validate the T-A formulation model, it is used to simulate racetrack coils made of second generation high temperature superconducting (2G HTS) tape, and the results are compared with the experimentally obtained data on the AC loss. The results show that the T-A formulation is accurate and efficient in calculating 2G HTS coils, including magnetic field distribution, current density distribution, and AC loss. Finally, the proposed model is used for simulating a 2000 turn coil to demonstrate its effectiveness and efficiency in simulating large-scale 2G HTS coils.
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28 July 2017
Research Article|
July 27 2017
A finite element model for simulating second generation high temperature superconducting coils/stacks with large number of turns
Fei Liang;
Fei Liang
1
Department of Electronic and Electrical Engineering, University of Bath
, Bath BA2 7AY, United Kingdom
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Sriharsha Venuturumilli;
Sriharsha Venuturumilli
1
Department of Electronic and Electrical Engineering, University of Bath
, Bath BA2 7AY, United Kingdom
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Huiming Zhang;
Huiming Zhang
1
Department of Electronic and Electrical Engineering, University of Bath
, Bath BA2 7AY, United Kingdom
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Min Zhang;
Min Zhang
1
Department of Electronic and Electrical Engineering, University of Bath
, Bath BA2 7AY, United Kingdom
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Jozef Kvitkovic;
Jozef Kvitkovic
2
Center for Advanced Power Systems, Florida State University
, Tallahassee, Florida 32310, USA
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Sastry Pamidi;
Sastry Pamidi
2
Center for Advanced Power Systems, Florida State University
, Tallahassee, Florida 32310, USA
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Yawei Wang;
Yawei Wang
1
Department of Electronic and Electrical Engineering, University of Bath
, Bath BA2 7AY, United Kingdom
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Weijia Yuan
Weijia Yuan
a)
1
Department of Electronic and Electrical Engineering, University of Bath
, Bath BA2 7AY, United Kingdom
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a)
Author to whom correspondence should be addressed: [email protected]
J. Appl. Phys. 122, 043903 (2017)
Article history
Received:
May 25 2017
Accepted:
July 12 2017
Citation
Fei Liang, Sriharsha Venuturumilli, Huiming Zhang, Min Zhang, Jozef Kvitkovic, Sastry Pamidi, Yawei Wang, Weijia Yuan; A finite element model for simulating second generation high temperature superconducting coils/stacks with large number of turns. J. Appl. Phys. 28 July 2017; 122 (4): 043903. https://doi.org/10.1063/1.4995802
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