IEEE Transactions on Applied Superconductivity最新文献_第6页

AC Loss Prediction of HTS Propulsion Motors Using Convolutional Neural Network-Based Surrogate Model for System-Level Modelling of Electric Aircraft 基于卷积神经网络的电动飞机系统级代理模型的高温超导推进电机交流损耗预测

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-16 DOI: 10.1109/TASC.2026.3665169

Shahin Alipour Bonab;Frederick Berg;Wenjuan Song;Alexander Colle;Mohammad Yazdani-Asrami

{"title":"AC Loss Prediction of HTS Propulsion Motors Using Convolutional Neural Network-Based Surrogate Model for System-Level Modelling of Electric Aircraft","authors":"Shahin Alipour Bonab;Frederick Berg;Wenjuan Song;Alexander Colle;Mohammad Yazdani-Asrami","doi":"10.1109/TASC.2026.3665169","DOIUrl":"10.1109/TASC.2026.3665169","url":null,"abstract":"System-level modelling, crucial for designing a superconducting propulsion by simulating the interactive behavior of components, faces a trade-off: simple models like look-up tables are fast but inaccurate, while detailed Finite-Element (FE) models are accurate but too slow for system-wide studies. This work addresses the challenge of AC loss analysis of superconducting propulsion motors by proposing a novel deep-learning surrogate framework that delivers extremely fast and highly accurate solutions. This enables more efficient design, monitoring, and optimization of superconducting motors within large-scale system models. The proposed artificial intelligence-based model benefits from integrated feature extraction powered by Convolutional Networks, followed by a deep interconnected neural network to grasp dynamic AC loss waveforms. This work advances real-world applicability by enhancing time-dependent surrogate models using data from an FE machine model. The results demonstrate that the proposed deep neural network captures time-dependent AC loss behavior with above 99.92% accuracy, dynamically predicting a full AC loss waveform over a cycle in just 3.8 milliseconds. These findings will enable advanced system-level aircraft simulations to incorporate dynamic, highly accurate, and ultra-fast AC loss predictions, allowing exploration of various operating conditions encountered during flight.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-6"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148488027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AC Loss Property of a Two-Dimensional Array of REBCO Superconducting Tapes 二维REBCO超导带阵列的交流损耗特性

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-12 DOI: 10.1109/TASC.2026.3664071

Hiromasa Sasa;Yuuki Himeno;Takaemi Suenaga;Shun Miura;Hiroshi Miyazaki;Masataka Iwakuma

{"title":"AC Loss Property of a Two-Dimensional Array of REBCO Superconducting Tapes","authors":"Hiromasa Sasa;Yuuki Himeno;Takaemi Suenaga;Shun Miura;Hiroshi Miyazaki;Masataka Iwakuma","doi":"10.1109/TASC.2026.3664071","DOIUrl":"10.1109/TASC.2026.3664071","url":null,"abstract":"To design a safe superconducting motor with high power density for aircraft applications, an accurate estimation of the AC loss in superconducting windings is required. This study investigates the AC loss characteristics of a two-dimensional array of REBa2Cu3O<italic>y tapes arranged in both the width and thickness directions, representing the cross-section of a motor winding. The AC loss was evaluated experimentally and numerically, with the key parameters being the number of tapes and the gap distance between adjacent superconducting layers. The AC loss behavior is expressed as a power function, <italic>a’bm<italic>γ’, where <italic>bm is the normalized field amplitude, and <italic>a’ and <italic>γ’ are the fitting parameters. Both <italic>a’ and <italic>γ’ were found to follow an exponential approach with respect to the number of tapes in the width direction. Additionally, <italic>a’ was found to be inversely proportional to the number of tapes in the thickness direction. For these properties, quantitative expressions were derived and confirmed to correspond to the measured and calculated results.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-5"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148488174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization and Testing of a Multiphase Superconducting Axial Machine for Electric Aircraft 电动飞机用多相超导轴向电机的特性与测试

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-19 DOI: 10.1109/TASC.2026.3666495

Fábio Encarnação-Gregório;João Murta-Pina;Mohammad Yazdani-Asrami;Vitor Fernão Pires;Alfredo Álvarez-García;Belén Rivera;José-Ángel Velaz;Bárbara Maria Oliveira Santos;Gabriel dos Santos

{"title":"Characterization and Testing of a Multiphase Superconducting Axial Machine for Electric Aircraft","authors":"Fábio Encarnação-Gregório;João Murta-Pina;Mohammad Yazdani-Asrami;Vitor Fernão Pires;Alfredo Álvarez-García;Belén Rivera;José-Ángel Velaz;Bárbara Maria Oliveira Santos;Gabriel dos Santos","doi":"10.1109/TASC.2026.3666495","DOIUrl":"10.1109/TASC.2026.3666495","url":null,"abstract":"Growing environmental concerns and increasingly stringent emission regulations are driving the energy transition toward electrification. The aviation sector, facing rising air traffic and the urgent need for decarbonization, is a strong candidate for this transition. Significant efforts are being made to develop propulsion technologies that minimize emissions while maintaining high performance. Cryo-electrification, which integrates high-temperature superconducting (HTS) machines with cryogenic cooling, is a promising solution for this transition. The exceptional current density of HTS materials enables electric machines with high specific power density (SPD), a key requirement for aircraft applications. This work focuses on the development of a variable-pole multiphase axial flux machine designed for integration into a highly flexible, fault-tolerant electromechanical drive. The machine consists of two semi-stators and a rotor constructed from slices of HTS REBCO (rare-earth bismuth copper oxide) tapes. The variable-pole configuration allows the machine to function as an electronic gearbox, providing operational flexibility. The magnetic flux generated by the stator is trapped in the HTS rotor, forming the basis of its superconducting operation. To validate the concept, flux measurements will be performed using pick-up coils. Additionally, preliminary finite element method (FEM) simulations were performed. Experimental results will be presented to demonstrate the feasibility of this design. This study serves as a proof of concept, but further optimization is required to achieve the high SPD necessary for aviation applications.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-5"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148488710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication and Testing of a HTS Field Coil for a Homopolar Alternator 同极交流发电机高温超导磁场线圈的制造与测试

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-03-23 DOI: 10.1109/TASC.2026.3673756

Laurenz Ziegler;Robin Köster;Andreas Binder

引用次数: 0

Pulsed Magnetization on Jointless Loops Coil Using Multi-Toroidal Auxiliary Winding 多环面辅助绕组无缝线圈的脉冲磁化研究

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-24 DOI: 10.1109/TASC.2026.3667496

Flávio Goulart dos Reis Martins;Diego Luiz Silvestre Menezes;Bernardo Albuquerque Domingues da Silva;Gabriel dos Santos;Bárbara Maria Oliveira Santos;Felipe Sass;Guilherme Gonçalves Sotelo;Rubens de Andrade Junior

{"title":"Pulsed Magnetization on Jointless Loops Coil Using Multi-Toroidal Auxiliary Winding","authors":"Flávio Goulart dos Reis Martins;Diego Luiz Silvestre Menezes;Bernardo Albuquerque Domingues da Silva;Gabriel dos Santos;Bárbara Maria Oliveira Santos;Felipe Sass;Guilherme Gonçalves Sotelo;Rubens de Andrade Junior","doi":"10.1109/TASC.2026.3667496","DOIUrl":"10.1109/TASC.2026.3667496","url":null,"abstract":"Jointless persistent current coils, known as the crossed loops, have been developed and studied by our group since 2018 and could be an interesting solution for challenges concerning current leads for HTS field coils in electric machine applications. To trap flux in such coils, pulsed field magnetization (PFM) through the armature coils is often employed. In this work, a different PFM is proposed, by taking advantage of the jointless loops geometry. This approach uses a low-current secondary winding magnetically coupled to the coil heads, wound in a toroidal shape, forcing the pulsed magnetic field around the HTS tapes and inducing persistent currents. The main advantage of this idea is that such auxiliary winding could be used as a flux pump for its main coils without the need to reroute the stator source for a re-magnetization process. A prototype of the proposed application is presented in this work. It was verified using finite element simulations then built and tested as a proof of concept. Its behavior is observed and a special attention is given to how the coupling of multiple loops affect the global persistent current of a coil, due to the dependence of the critical current to the magnetic field. The data show the feasibility of the proposed idea and opens another path for improving the HTS crossed-loops machine topology.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-5"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148489600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructural Analysis of Transmission Electron Microscope Images of YBCO Superconducting Thin Films Using Machine Learning Image Recognition 基于机器学习图像识别的YBCO超导薄膜透射电镜图像微观结构分析

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-16 DOI: 10.1109/TASC.2026.3653710

Ataru Ichinose;Takumi Honda;Keiichi Horio;Kaname Matsumoto;Yusuke Ichino;Tomoya Horide;Yutaka Yoshida

{"title":"Microstructural Analysis of Transmission Electron Microscope Images of YBCO Superconducting Thin Films Using Machine Learning Image Recognition","authors":"Ataru Ichinose;Takumi Honda;Keiichi Horio;Kaname Matsumoto;Yusuke Ichino;Tomoya Horide;Yutaka Yoshida","doi":"10.1109/TASC.2026.3653710","DOIUrl":"10.1109/TASC.2026.3653710","url":null,"abstract":"In the Japan JST-CREST program, we aimed to establish a robust manufacturing process for high-temperature superconducting-coated conductors that ensures high performance regardless of equipment or operator variability. While process optimization is essential, understanding the microstructural origins of the superconducting properties is critical. It is empirically known that the magnetic field dependence of the critical current density (<italic>JC–<italic>B characteristics) in YBa2Cu3Oy (YBCO) superconducting thin films correlates with their microstructure, particularly when doped with BaMO3 (M = Zr, Sn, Hf), which forms nanorods acting as strong flux pinning centers. In this study, we focused on BaHfO3 (BHO)-doped YBCO superconducting thin films and quantitatively evaluated impurities in BHO nanorods from transmission electron microscope images using the deep learning-based object detection algorithm YOLOv5. Through an investigation of the detected BHO nanorods, the matching field and BHO content are analyzed, and machine learning-based microstructural evaluation is demonstrated to have robust performance and high efficiency, making it effective for optimizing superconducting properties.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-5"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11355957","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148489784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Acceleration of Multi-Scale LTS Magnet Simulations With Neural Network Surrogate Models 基于神经网络代理模型的多尺度LTS磁体仿真加速

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-02 DOI: 10.1109/TASC.2026.3660620

Louis Denis;Julien Dular;Vincent Nuttens;Mariusz Wozniak;Benoît Vanderheyden;Christophe Geuzaine

{"title":"Acceleration of Multi-Scale LTS Magnet Simulations With Neural Network Surrogate Models","authors":"Louis Denis;Julien Dular;Vincent Nuttens;Mariusz Wozniak;Benoît Vanderheyden;Christophe Geuzaine","doi":"10.1109/TASC.2026.3660620","DOIUrl":"10.1109/TASC.2026.3660620","url":null,"abstract":"While the prediction of AC losses during transients is critical for designing large-scale low-temperature superconducting (LTS) magnets, brute-force finite-element (FE) simulation of their detailed geometry down to the length scale of the conductors is a computational challenge. Multi-scale methods, balancing between a coarse approximation of the fields at the scale of the magnet and a detailed description at the scale of the conductors, are promising approaches to reduce the computational load while keeping a sufficient accuracy. In this work, we introduce a neural network approach to accelerate multi-scale magneto-thermal simulations of LTS magnets by replacing costly single-turn FE models with neural network surrogates. The neural network architecture is presented and discussed, together with an automated procedure for generating simulation data for its training. The resulting accelerated multi-scale model is used to simulate current ramp-up procedures for the IBA S2C2 magnet. The surrogate-based multi-scale model is compared with a conventional multi-scale model based on a composite wire-in-channel FE model. The surrogate model is shown to reproduce single-turn filament hysteresis, inter-filament coupling, and eddy losses, while the computational time of the multi-scale method is reduced by a factor of 800.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-6"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148489939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the Influence of Ta and Zr Addition on the Diffusion Reaction of Nb3Sn 加入Ta和Zr对Nb3Sn扩散反应影响的研究

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-19 DOI: 10.1109/TASC.2026.3655252

Chunguang Wang;Qiang Guo;Bo Wu;Yigong Shi;Guangyu Han;Jiaxu Chen;Pengju Li;Jianya Chen;Yang Xin;Jianfeng Li;Xianghong Liu;Yong Feng;Pingxiang Zhang

{"title":"Study on the Influence of Ta and Zr Addition on the Diffusion Reaction of Nb3Sn","authors":"Chunguang Wang;Qiang Guo;Bo Wu;Yigong Shi;Guangyu Han;Jiaxu Chen;Pengju Li;Jianya Chen;Yang Xin;Jianfeng Li;Xianghong Liu;Yong Feng;Pingxiang Zhang","doi":"10.1109/TASC.2026.3655252","DOIUrl":"10.1109/TASC.2026.3655252","url":null,"abstract":"In commercial Nb3Sn wires, the Nb3Sn phase is formed by a solid-state diffusion reaction. As one of the reaction precursor materials, parent Nb-alloys are closely related to the quality of the formed Nb3Sn. The properties of niobium can be significantly modified by element doping. In this work, Nb-Ta and Nb-Zr alloys, along with pure Nb, were utilized to manufacture single Tube-type sub-elements for systematically studying the influence of Ta and Zr doping on the diffusion reaction of Nb3Sn. During the high-temperature stage, various heat treatment temperatures were applied to the samples. The Nb3Sn grain size, growth rate of the Nb3Sn layer, and the critical field and temperature are characterized and analyzed. It was found that Zr doping promotes the diffusion reaction in Nb3Sn more effectively than Ta doping. As the heat treatment temperature increases, the effect of Ta doping on promoting the diffusion reaction weakens. Zr demonstrates a significant effect on refining Nb3Sn grains, while Ta shows no grain refinement effect. As the temperature rises, the grain refinement effect of Zr doping becomes more pronounced. Both Ta and Zr doping can enhance the upper critical field of Nb3Sn, with Ta being more effective in this regard than Zr.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-5"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148490431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EUCAS 2025 Conference Co-Chairs’ Introduction EUCAS 2025会议联合主席介绍

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-08-14 DOI: 10.1109/TASC.2026.3705915

João Murta-Pina;Anabela Pronto

引用次数: 0

Upcoming Special Conference Issues 即将到来的特别会议议题

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-08-24 DOI: 10.1109/TASC.2026.3719718

引用次数: 0