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2. Roadmap on artificial intelligence and big data techniques for superconductivity

Author

Yazdani-Asrami, Mohammad, primary, Song, Wenjuan, additional, Morandi, Antonio, additional, De Carne, Giovanni, additional, Murta-Pina, Joao, additional, Pronto, Anabela, additional, Oliveira, Roberto, additional, Grilli, Francesco, additional, Pardo, Enric, additional, Parizh, Michael, additional, Shen, Boyang, additional, Coombs, Tim, additional, Salmi, Tiina, additional, Wu, Di, additional, Coatanea, Eric, additional, Moseley, Dominic A, additional, Badcock, Rodney A, additional, Zhang, Mengjie, additional, Marinozzi, Vittorio, additional, Tran, Nhan, additional, Wielgosz, Maciej, additional, Skoczeń, Andrzej, additional, Tzelepis, Dimitrios, additional, Meliopoulos, Sakis, additional, Vilhena, Nuno, additional, Sotelo, Guilherme, additional, Jiang, Zhenan, additional, Große, Veit, additional, Bagni, Tommaso, additional, Mauro, Diego, additional, Senatore, Carmine, additional, Mankevich, Alexey, additional, Amelichev, Vadim, additional, Samoilenkov, Sergey, additional, Yoon, Tiem Leong, additional, Wang, Yao, additional, Camata, Renato P, additional, Chen, Cheng-Chien, additional, Madureira, Ana Maria, additional, and Abraham, Ajith, additional

Published
2023
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5. Corrigendum: A new benchmark problem for electromagnetic modelling of superconductors: the high-T c superconducting dynamo (2020 Supercond. Sci. Technol. 33 105009)

Author

Ainslie, Mark, primary, Grilli, Francesco, additional, Quéval, Loïc, additional, Pardo, Enric, additional, Perez-Mendez, Fernando, additional, Mataira, Ratu, additional, Morandi, Antonio, additional, Ghabeli, Asef, additional, Bumby, Chris, additional, and Brambilla, Roberto, additional

Published
2021
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7. Superconducting motors for aircraft propulsion: the Advanced Superconducting Motor Experimental Demonstrator project

Author

Grilli, Francesco, primary, Benkel, Tara, additional, Hänisch, Jens, additional, Lao, Mayraluna, additional, Reis, Thomas, additional, Berberich, Eva, additional, Wolfstädter, Simon, additional, Schneider, Christian, additional, Miller, Paul, additional, Palmer, Chloe, additional, Glowacki, Bartek, additional, Climente-Alarcon, Vicente, additional, Smara, Anis, additional, Tomkow, Lukasz, additional, Teigelkötter, Johannes, additional, Stock, Alexander, additional, Büdel, Johannes, additional, Jeunesse, Loïc, additional, Staempflin, Martin, additional, Delautre, Guillaume, additional, Zimmermann, Baptiste, additional, Woude, Ruud van der, additional, Perez, Ana, additional, Samoilenkov, Sergey, additional, Molodyk, Alexander, additional, Pardo, Enric, additional, Kapolka, Milan, additional, Li, Shuo, additional, and Dadhich, Anang, additional

Published
2020
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12. A new benchmark problem for electromagnetic modelling of superconductors: the high-Tc superconducting dynamo.

Author

Ainslie, Mark, Grilli, Francesco, Quéval, Loďc, Pardo, Enric, Perez-Mendez, Fernando, Mataira, Ratu, Morandi, Antonio, Ghabeli, Asef, Bumby, Chris, and Brambilla, Roberto

Subjects
COMPUTATIONAL electromagnetics, ELECTRIC generators, ELECTRIC currents, MAGNETS, POWER resources, SUPERCONDUCTORS, SUPERCONDUCTING magnets, BENCHMARK problems (Computer science)
Abstract

The high-Tc superconducting (HTS) dynamo is a promising device that can inject large DC supercurrents into a closed superconducting circuit. This is particularly attractive to energise HTS coils in NMR/MRI magnets and superconducting rotating machines without the need for connection to a power supply via current leads. It is only very recently that quantitatively accurate, predictive models have been developed which are capable of analysing HTS dynamos and explain their underlying physical mechanism. In this work, we propose to use the HTS dynamo as a new benchmark problem for the HTS modelling community. The benchmark geometry consists of a permanent magnet rotating past a stationary HTS coated-conductor wire in the open-circuit configuration, assuming for simplicity the 2D (infinitely long) case. Despite this geometric simplicity the solution is complex, comprising time-varying spatially-inhomogeneous currents and fields throughout the superconducting volume. In this work, this benchmark problem has been implemented using several different methods, including H -formulation-based methods, coupled H - A and T - A formulations, the Minimum Electromagnetic Entropy Production method, and integral equation and volume integral equation-based equivalent circuit methods. Each of these approaches show excellent qualitative and quantitative agreement for the open-circuit equivalent instantaneous voltage and the cumulative time-averaged equivalent voltage, as well as the current density and electric field distributions within the HTS wire at key positions during the magnet transit. Finally, a critical analysis and comparison of each of the modelling frameworks is presented, based on the following key metrics: number of mesh elements in the HTS wire, total number of mesh elements in the model, number of degrees of freedom, tolerance settings and the approximate time taken per cycle for each model. This benchmark and the results contained herein provide researchers with a suitable framework to validate, compare and optimise their own methods for modelling the HTS dynamo. [ABSTRACT FROM AUTHOR]

Published
2020
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17. Non-uniformity of coated conductor tapes

Author

Solovyov, Mykola, primary, Pardo, Enric, additional, Šouc, Ján, additional, Gömöry, Fedor, additional, Skarba, Michal, additional, Konopka, Pavol, additional, Pekarčíková, Marcela, additional, and Janovec, Jozef, additional

Published
2013
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23. Superconducting motors for aircraft propulsion: the Advanced Superconducting Motor Experimental Demonstrator project

Author

Grilli, Francesco, Benkel, Tara, H��Anisch, Jens, Lao, Mayraluna, Reis, Thomas, Berberich, Eva, Wolfst��Adter, Simon, Schneider, Christian, Miller, Paul, Palmer, Chloe, Glowacki, Bartek, Climente-Alarcon, Vicente, Smara, Anis, Tomkow, Lukasz, Teigelk��Otter, Johannes, Stock, Alexander, Bu��Del, Johannes, Jeunesse, Lo��c, Staempflin, Martin, Delautre, Guillaume, Zimmermann, Baptiste, Woude, Ruud Van Der, Perez, Ana, Samoilenkov, Sergey, Molodyk, Alexander, Pardo, Enric, Kapolka, Milan, Li, Shuo, and Dadhich, Anang

Subjects
7. Clean energy
Abstract

The European Union-funded Advanced Superconducting Motor Experimental Demonstrator (ASuMED) project started in May 2017 with the purpose of demonstrating the benefits of a new, fully superconducting motor for reaching the targets established by the Flightpath 2050 plan. The project aims at a motor power density of 20kW kg$^{-1}$ using a high-temperature superconducting (HTS) stator. The rotor will use HTS stacks operating like permanent magnets. A highly efficient cryostat for the motor combined with an integrated cryogenic cooling system and associated power converter will be used. This article provides a general overview of the prototype that is currently being assembled and that will be tested soon.

24. Transport and magnetization ac losses of ROEBEL assembled coated conductor cables: measurements and calculations.

Author

Terzieva, Stanimira, Vojenciak, Michail, Pardo, Enric, Grilli, Francesco, Drechsler, Antje, Kling, Andrea, Kudymow, Andrej, Gomory, Fedor, and Goldacker, Wilfried

Subjects
COPPER oxide superconductors, MAGNETIZATION, BARIUM, YTTRIUM, SURFACE coatings, POWERLINE ampacity, MAGNETIC fields
Abstract

Many superconductor applications require cables with a high current capacity. This is not feasible with single-piece coated conductors because their ac losses are too large. Therefore, it is necessary to develop superconducting cables with a high current capacity and low ac losses. One promising solution is given by ROEBEL cables. We assembled three ROEBEL cables from commercial YBCO coated conductors. The cables have the same width but a different number of strands, which results in different aspect ratios and current capacities. We experimentally studied their ac losses under a transport current or a perpendicular magnetic field. In addition, we performed numerical calculations, which agree with the experiments, especially for the transport case. We found that in the cables there is good current sharing between the strands. We also found that stacking the strands reduces the magnetization losses. For a given critical current, thicker cables have lower magnetization ac losses. In addition, a conducting matrix is not required for a good current sharing between strands. [ABSTRACT FROM AUTHOR]

Published
2010
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25. A new benchmark problem for electromagnetic modelling of superconductors: the high- T c superconducting dynamo

Author

Francesco Grilli, Enric Pardo, Fernando Perez-Mendez, Antonio Morandi, Loic Queval, Chris W. Bumby, Ratu Mataira, Mark D. Ainslie, Roberto Brambilla, Asef Ghabeli, Ainslie, Mark [0000-0003-0466-3680], Grilli, Francesco [0000-0003-0108-7235], Quéval, Loïc [0000-0003-3934-4372], Pardo, Enric [0000-0002-6375-4227], Perez-Mendez, Fernando [0000-0001-7980-9539], Mataira, Ratu [0000-0003-0892-5430], Morandi, Antonio [0000-0002-1845-4006], Ghabeli, Asef [0000-0001-9907-4509], Bumby, Chris [0000-0001-8555-2469], Apollo - University of Cambridge Repository, Grilli, F [0000-0003-0108-7235], Quéval, L [0000-0003-3934-4372], Pardo, E [0000-0002-6375-4227], Perez-Mendez, F [0000-0001-7980-9539], Mataira, R [0000-0003-0892-5430], Morandi, A [0000-0002-1845-4006], Ghabeli, A [0000-0001-9907-4509], Bumby, C [0000-0001-8555-2469], Ainslie, M [0000-0003-0466-3680], Ainslie M., Grilli F., Queval L., Pardo E., Perez-Mendez F., Mataira R., Morandi A., Ghabeli A., Bumby C., and Brambilla R.

Subjects
Paper, High-temperature superconductivity, Materials science, FOS: Physical sciences, HTS dynamo, law.invention, Superconductivity (cond-mat.supr-con), high temperature superconductors, law, Condensed Matter::Superconductivity, High temperature superconductor, Materials Chemistry, ddc:530, Electrical and Electronic Engineering, Superconductivity, coated conductor, Computer simulation, Physics, Condensed Matter - Superconductivity, Metals and Alloys, Computational Physics (physics.comp-ph), Condensed Matter Physics, Electromagnetic modelling, Computational physics, HTS modelling, numerical simulation, Ceramics and Composites, Benchmark (computing), flux pump, Physics - Computational Physics, Dynamo
Abstract

The high-Tc superconducting (HTS) dynamo is a promising device that can inject large DC supercurrents into a closed superconducting circuit. This is particularly attractive to energise HTS coils in NMR/MRI magnets and superconducting rotating machines without the need for connection to a power supply via current leads. It is only very recently that quantitatively accurate, predictive models have been developed which are capable of analysing HTS dynamos and explain their underlying physical mechanism. In this work, we propose to use the HTS dynamo as a new benchmark problem for the HTS modelling community. The benchmark geometry consists of a permanent magnet rotating past a stationary HTS coated-conductor wire in the open-circuit configuration, assuming for simplicity the 2D (infinitely long) case. Despite this geometric simplicity the solution is complex, comprising time-varying spatially-inhomogeneous currents and fields throughout the superconducting volume. In this work, this benchmark problem has been implemented using several different methods, including H-formulation-based methods, coupled H-A and T-A formulations, the Minimum Electromagnetic Entropy Production method, and integral equation and volume integral equation-based equivalent circuit methods. Each of these approaches show excellent qualitative and quantitative agreement for the open-circuit equivalent instantaneous voltage and the cumulative time-averaged equivalent voltage, as well as the current density and electric field distributions within the HTS wire at key positions during the magnet transit. A critical analysis and comparison of each of the modelling frameworks is presented, based on the following key metrics: number of mesh elements in the HTS wire, total number of mesh elements in the model, number of degrees of freedom (DOFs), tolerance settings and the approximate time taken per cycle for each model., 22 pages, 7 figures, 2 tables

Published
2020

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