IEEE Transactions on Applied Superconductivity最新文献_第5页

Electromagnetic Design of kW-Class HTS Rotating Machines for Carbon-Neutral Ports 碳中和港口用kw级高温超导旋转电机电磁设计

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-20 DOI: 10.1109/TASC.2026.3666496

K. Tsuzuki;M. Izumi;T. Ida;D. Oikawa

引用次数: 0

Current Density Distribution Estimation of REBCO Coated Conductors Using Machine Learning 利用机器学习估计REBCO涂层导体的电流密度分布

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-03-03 DOI: 10.1109/TASC.2026.3670249

Junichiro Takei;Takanobu Mato;Atsushi Ishiyama;So Noguchi

{"title":"Current Density Distribution Estimation of REBCO Coated Conductors Using Machine Learning","authors":"Junichiro Takei;Takanobu Mato;Atsushi Ishiyama;So Noguchi","doi":"10.1109/TASC.2026.3670249","DOIUrl":"10.1109/TASC.2026.3670249","url":null,"abstract":"High-temperature superconducting (HTS) rare-earth barium copper oxide (REBCO) coated conductors (CCs) are promising for high-field applications; however, their critical current often exhibits non-uniformity along the tape length due to fabrication-induced defects such as edge cracks or low critical current region. To ensure the reliability of REBCO magnets, non-destructive and high-resolution evaluation of the local critical current distribution is essential. The Hall array measurement (HAM) method enables two-dimensional mapping of the critical current density distribution through the inverse analysis using the measured field distribution. The performance of the conventional methods is limited with the number of sample points in HAM. In this study, a convolutional neural network (CNN)-based inverse analysis method is proposed to reconstruct the current density distribution from the measured field. The CNN-based estimator is trained with 5,000 pairs of field and current density distributions artificially generated considering the current conservation law. Experimental validation demonstrated that the CNN-based method can estimate a more realistic current density distribution than the conventional FFT-based approach, even with a limited number of measurement points. Although the CNN results showed slight noise effects, they remained consistent with the expected Bean's model behavior. The proposed approach offers a promising framework for fast and accurate non-destructive evaluation of REBCO tapes, contributing to improved reliability of HTS magnet systems.","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":"148484968","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

Optimization Procedure to Design a Low-Losses MgB2 Wire 低损耗MgB2导线的优化设计

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-28 DOI: 10.1109/TASC.2026.3658053

L. Cavallucci;L. Soldati;S. M. Cutore;T. Spina;M. Tropeano;R. Tebano;L. G. Tabarez Rodriguez;A. Macchiagodena;M. Breschi

引用次数: 0

Superconducting Stator Winding for Axial Flux Electrical Machines Applications 轴向磁通电机用超导定子绕组

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-26 DOI: 10.1109/TASC.2026.3666508

Giuseppe Messina;Gianluca De Marzi;Ferruccio Maierna;Luigi Muzzi

{"title":"Superconducting Stator Winding for Axial Flux Electrical Machines Applications","authors":"Giuseppe Messina;Gianluca De Marzi;Ferruccio Maierna;Luigi Muzzi","doi":"10.1109/TASC.2026.3666508","DOIUrl":"10.1109/TASC.2026.3666508","url":null,"abstract":"Axial flux permanent magnet (AFPM) electrical machines, characterized by disc-shaped rotor and stator structures, offer a high power-to-weight ratio. The replacement of traditional copper stator windings with high-temperature superconducting (HTS) windings has led to the development of lighter, more compact, and higher-performing machines, despite the technological challenges posed by HTS windings. Notably, HTS tapes experience AC power loss when subjected to alternating currents or when interacting with time-varying magnetic fields. Research at the Superconductivity Group in ENEA Frascati, in partnership with ICAS Company, focuses on the electromagnetic characteristics of second-generation (2G) HTS materials, particularly concerning AC loss in HTS coils. This paper presents the experimental results of two HTS coils wound using distinct HTS tape structures and tested within the liquid nitrogen (LN2) temperature range. Building on the geometric data from these coils, the electromagnetic behaviour of superconducting stator winding (SSW) topologies made from them was investigated. Finite element method (FEM) models of two AFPM prototypes, associated with two SSW topologies, were created, analyzed, and compared. By combining experimental data from the HTS coils with simulation results, a preliminary analytical design for AFPM superconducting synchronous prototypes is developed, enabling predictions of their performance across a range of operating conditions and rotor speeds.","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":"148487072","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

Experimental Investigation of Bridge Quench in an HTS Flux Pump Operating at 77 K 77 K高温超导磁通泵桥式淬火实验研究

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-15 DOI: 10.1109/TASC.2026.3652519

Zhipeng Huang;Yuyang Wu;Wenqi Bai;Haigening Wei;C. M. Mesteru;Luning Hao;Qi Wang;Tim Coombs

{"title":"Experimental Investigation of Bridge Quench in an HTS Flux Pump Operating at 77 K","authors":"Zhipeng Huang;Yuyang Wu;Wenqi Bai;Haigening Wei;C. M. Mesteru;Luning Hao;Qi Wang;Tim Coombs","doi":"10.1109/TASC.2026.3652519","DOIUrl":"10.1109/TASC.2026.3652519","url":null,"abstract":"Transformer–rectifier flux pumps offer an effective and contactless means to supply current to high-temperature superconducting (HTS) magnets, significantly reducing thermal losses associated with conventional current leads. They have demonstrated high-current capability and the ability to sustain target currents and magnetic fields over extended periods by compensating for inherent flux dissipation, showing promise for compact, cryogen-free superconducting systems. However, while liquid nitrogen are well studied, the stability of conduction-cooled systems remains insufficiently investigated. This paper presents an experimental study on the bridge quench behavior of a conduction-cooled half-wave transformer–rectifier HTS flux pump. By varying the amplitude and frequency of the applied AC magnetic field, the relationship between dynamic losses, bridge temperature rise, and quench initiation was analyzed. The results reveal that excessive field amplitude leads to localized resistive transition and voltage spikes, which suppress flux pumping efficiency and introduce current ripple. Comparisons with LN<sub>2</sub> cooling confirm that inadequate heat removal is the dominant factor limiting system stability.","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":"148487297","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

Design of the Neon-Based Cooling System for the 250 kW Fully Superconducting “SupraGenSys” Demonstrator 250kw全超导“SupraGenSys”演示器霓虹灯冷却系统设计

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-04-24 DOI: 10.1109/TASC.2026.3687484

Jannis Sindram;Sebastian Lengsfeld;Joseph Law;Marco Jung

{"title":"Design of the Neon-Based Cooling System for the 250 kW Fully Superconducting “SupraGenSys” Demonstrator","authors":"Jannis Sindram;Sebastian Lengsfeld;Joseph Law;Marco Jung","doi":"10.1109/TASC.2026.3687484","DOIUrl":"10.1109/TASC.2026.3687484","url":null,"abstract":"In the SupraGenSys 2 project, a fully superconducting 250 kW wind generator is being developed and tested under laboratory conditions to demonstrate its feasibility for low-speed, high-torque applications. The results of this investigation are intended to pave the way for the integration of multi-megawatt, direct-drive wind turbines. In a two-phase neon thermosiphon with indirect coil cooling, the heat load is transferred from the individual components to the condenser of the cold heads. The design uses the inclination of the tower head, enabled by the tilt angle, to circulate the coolant, eliminating the need for pumps. Although this approach can be easily implemented for the stator cooling system, it poses significant challenges for the rotor cooling system. This is because the cold heads must remain stationary due to better accessibility for maintenance. In addition, distributing the cooling medium in low-speed applications without pumps is challenging. This cooling concept aims to enable reliable heat transfer in a fully superconducting wind generator, making it practical for use in large-scale wind turbines and overcoming key challenges of system integration.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"5205305-5205305"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148487412","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

Power Transmission Characteristics of the Wireless Power Transmission System Using Multiple HTS Coils and Copper Coils 多HTS线圈与铜线圈无线输电系统的输电特性

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-03-04 DOI: 10.1109/TASC.2026.3670803

Ryota Inoue;Takahiro Iwamoto;Ryuto Shiozaki;Hiroshi Ueda;SeokBeom Kim;Shohei Komeda

{"title":"Power Transmission Characteristics of the Wireless Power Transmission System Using Multiple HTS Coils and Copper Coils","authors":"Ryota Inoue;Takahiro Iwamoto;Ryuto Shiozaki;Hiroshi Ueda;SeokBeom Kim;Shohei Komeda","doi":"10.1109/TASC.2026.3670803","DOIUrl":"10.1109/TASC.2026.3670803","url":null,"abstract":"Recently, large-capacity wireless power transmission (WPT) systems of over 500 kW are required for the rapid charging of batteries in electric vehicles (EVs). Therefore, we have been investigating a WPT system for EVs using a high-temperature superconducting (HTS) coil as the ground-side coil. In this study, we proposed the WPT system using multiple HTS and copper coils with a coil arrangement designed to minimize the cross-coupling between coils connected in parallel. Moreover, we investigated the power transmission characteristics of the proposed WPT system with respect to the number of coils and the operating temperature of the HTS coils. As a result, the receiving power of the proposed WPT system increased with an increase in the number of coils connected in parallel and with a decrease in the operating temperature of the HTS coils. Specifically, the receiving power exceeded the target of 500 kW in the 3 to 3 arrangement with three HTS coils and three copper coils at 40 K, and the 1 to 3 arrangement with one HTS coil and three copper coils at 40 K.","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":"148487413","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

Analysis on Operational Characteristics of DC Hybrid SFCLCB With Self-Pickup Function 带自吸功能的直流混合SFCLCB工作特性分析

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-03-25 DOI: 10.1109/TASC.2026.3664342

Seung-su Choi;Su-Hyeon Kim;Chan-Muk Park;Sung-Hun Lim

{"title":"Analysis on Operational Characteristics of DC Hybrid SFCLCB With Self-Pickup Function","authors":"Seung-su Choi;Su-Hyeon Kim;Chan-Muk Park;Sung-Hun Lim","doi":"10.1109/TASC.2026.3664342","DOIUrl":"10.1109/TASC.2026.3664342","url":null,"abstract":"Most of electric power devices used by consumers receive power through power converters, and as the number of power converters increases, the loss that occurs during the power conversion process also increases. For this reason, in modern power systems, the number of AC/DC hybrid power distribution systems is increasing along with the increase of DC power distribution systems. In DC power distribution systems, fault characteristics are that the DC fault current increases faster than in the AC fault current and DC current has no zero-crossing point. DC fault current requires quick interruption dozens of times faster than AC. In the existing protection method, when a relay detects a fault through current or voltage, the relay generates a trip signal, and the breaker operates by receiving the trip signal. This method can cause communication delay between the relay and the circuit breaker, which can affect rapid operation. In this paper, a DC hybrid superconducting fault current limiter circuit breaker (SFCLCB) was proposed to solve communication delays between protection devices. By combining a circuit breaker inside the DC hybrid superconducting fault current limiter (SFCL), the only controller engages in both current limiting and blocking, reducing operating time delays. The DC hybrid SFCLCB was conducted through simulations using PSCAD/EMTDC.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"5602006-5602006"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148487571","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

Improvement of Trapped Field Performance by Combining a Holed REBCO Bulk With a Cross-Shaped Soft-Iron Yoke 利用多孔REBCO块体与十字形软铁轭结合改善困井现场性能

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-03-18 DOI: 10.1109/TASC.2026.3671745

Kazuya Yokoyama;T. Oka

引用次数: 0

A Novel Design of High-Power-Density HTS Armature Synchronous Motor for Aviation Applications 航空用高功率密度高温超导电枢同步电动机的新设计

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-26 DOI: 10.1109/TASC.2026.3666517

Mingyuan Liu;Yuanzhi Zhang;Wanyu Zhang;Xinhong Gao;Ronghai Qu

引用次数: 0