IEEE Transactions on Applied Superconductivity最新文献_第8页

Simulating Superconducting Fault Current Limiters With Open-Core and Closed-Core Using the J-A Formulation 用J-A公式模拟开芯和闭芯超导故障限流器

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-07-28 DOI: 10.1109/TASC.2025.3593190

Fernando Jorge Monteiro Dias;Paulo Eduardo Darski Rocha;Gabriel dos Santos

{"title":"Simulating Superconducting Fault Current Limiters With Open-Core and Closed-Core Using the J-A Formulation","authors":"Fernando Jorge Monteiro Dias;Paulo Eduardo Darski Rocha;Gabriel dos Santos","doi":"10.1109/TASC.2025.3593190","DOIUrl":"https://doi.org/10.1109/TASC.2025.3593190","url":null,"abstract":"High-value asymmetrical short-circuit currents test the robustness of electrical equipment, increasing the risk of damage to circuit breakers and substation components. Fault current limiters (FCLs) offer a viable solution to mitigate such impacts without requiring retrofits or layout changes. Among these, the superconducting fault current limiter (SFCL), particularly the saturated iron-core variant (SIC-SFCL), has shown promising performance in both DC and AC substations. This study compares two SIC-SFCL sub-topologies, open-core (OC) and closed-core (CC), through two-dimensional finite element simulations under identical conditions. The model employs the J-A formulation, which relates the current density (J) to the magnetic vector potential (A), allowing for an accurate representation of superconducting tapes. The simulations analyze the response of the SFCLs to different fault scenarios, evaluating their effectiveness in mitigating fault currents. Additionally, voltage drops during steady-state operation, magnetic flux density, and harmonic injections into the grid are examined. Results indicate that the OC configuration exhibits a 10% higher fault current limitation during the initial peak compared to the CC configuration for a 1 kA fault; this advantage increases to 12% for a 3 kA fault. The OC configuration also exhibits reduced harmonic levels compared to the CC configuration. The CC SIC-SFCL presents odd harmonics, third, fifth, seventh, and ninth, which can lead to greater magnetic losses and reduced efficiency compared to the OC model. Conversely, the steady-state voltage drop is lower in the CC configuration than in the OC one. These results highlight the trade-offs between both configurations, serving as a foundation for future SIC-SFCL projects.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 7","pages":"1-8"},"PeriodicalIF":1.8,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843037","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

Variable Frequency Pulse Generation From Breathers in Josephson Transmission Lines 约瑟夫森传输线中呼吸器产生的变频脉冲

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-07-21 DOI: 10.1109/TASC.2025.3591399

Gregory Cunningham;Yufeng Ye;Kaidong Peng;Alec Yen;Jessica Kedziora;Kevin P. O'Brien

{"title":"Variable Frequency Pulse Generation From Breathers in Josephson Transmission Lines","authors":"Gregory Cunningham;Yufeng Ye;Kaidong Peng;Alec Yen;Jessica Kedziora;Kevin P. O'Brien","doi":"10.1109/TASC.2025.3591399","DOIUrl":"https://doi.org/10.1109/TASC.2025.3591399","url":null,"abstract":"Single flux quantum technology has the potential to enhance readout and control of superconducting quantum systems due to their low energy consumption, high speed, and cryogenic operating temperatures. Current cryogenic readout and control typically requires microwave pulses of specific frequencies to travel between the room temperature control electronics and the cryogenic setup. Latency in control and readout can be improved by generating pulses within the dilution refrigerator. In this work, we consider a protocol for generating gigahertz frequency microwave tones from trains of dc-centered flux solitons and fluxoids in Josephson transmission lines using the dynamics of breather formation, without room temperature synthesis or shunt/bias resistors. Simulations show that pulses with frequencies in the range of 15.2 GHz to 21.5 GHz can be generated with maximal energy efficiency of 97% and bandwidth from 40 MHz to 365 MHz. This protocol can also be used to generate gigahertz frequency Gaussian pulses. We detail metrics relevant to the control and readout of quantum systems, such as input power, output power, and footprint.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 7","pages":"1-9"},"PeriodicalIF":1.8,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144831789","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

2024 Conference Organization 2024年会议组织

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-07-18 DOI: 10.1109/TASC.2025.3570026

引用次数: 0

ASC 2024 Introduction ASC 2024简介

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-07-15 DOI: 10.1109/TASC.2025.3575489

Luisa Chiesa;Tiina Salmi;Hélène Felice;Anna Fox;Al Zeller

引用次数: 0

Fast-Recovery Superconducting Fault Current Limiter Based on a Novel Skeleton Topology for Future Cryo-Electric Aircraft: Reclosing and Repetitive Fault Cases 基于新型骨架拓扑的未来低温电动飞机快速恢复超导故障限流器：重合闸和重复故障案例

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-07-10 DOI: 10.1109/TASC.2025.3587754

Dedao Yan;Mohammad Yazdani-Asrami;Wenjuan Song

{"title":"Fast-Recovery Superconducting Fault Current Limiter Based on a Novel Skeleton Topology for Future Cryo-Electric Aircraft: Reclosing and Repetitive Fault Cases","authors":"Dedao Yan;Mohammad Yazdani-Asrami;Wenjuan Song","doi":"10.1109/TASC.2025.3587754","DOIUrl":"https://doi.org/10.1109/TASC.2025.3587754","url":null,"abstract":"Recovery characteristic of superconducting fault current limiters (SFCLs) is a critical factor during their design process. After a low impedance fault, an SFCL cannot return to the superconducting state abruptly, due to the large heat generation during fault and the resultant high temperature above critical temperature <italic>T<sub>c</sub></i>. Fast recovery of the SFCL will ensure fast reclosing and continuation of power supply in the power distribution network of an e-aircraft. In this work, a skeleton-based design of the helical bifilar SFCL was proposed to achieve fast recovery. The new structure ensures a larger cooling surface area between the high-temperature superconducting (HTS) tape and the coolant, thus enhancing recovery performance and reducing the recovery time of the SFCL. Multiple fault current limitation characterization profiles, including limited current, voltage drop across the SFCL, and resistance and temperature of the SFCL, were analyzed and compared with those of the classic helical bifilar SFCL. Studies were conducted on different initial operating temperatures, different HTS tape length usages, and different reclosing time ranges. The results show that the recovery time has been shortened from 2.2 to 0.49 s by the proposed new SFCL, as compared to the classic helical bifilar SFCL. This skeleton-based fast-recovery SFCL provides new ideas for fault management in future cryo-electric aircraft.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 7","pages":"1-12"},"PeriodicalIF":1.7,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144695612","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

Equivalent Circuit Extraction of MI-HTS Coil Including High-Frequency Region for Electromagnetic Transient Simulation With Voltage-Source Converter 电压源变换器电磁瞬态仿真中含高频区域的MI-HTS线圈等效电路提取

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-07-10 DOI: 10.1109/TASC.2025.3587992

Jaeyeon Park;Jisun Ham;Junyeol Maeng;Chaemin Im;Dongsu Seo;Seungyong Hahn;Shenghui Cui

{"title":"Equivalent Circuit Extraction of MI-HTS Coil Including High-Frequency Region for Electromagnetic Transient Simulation With Voltage-Source Converter","authors":"Jaeyeon Park;Jisun Ham;Junyeol Maeng;Chaemin Im;Dongsu Seo;Seungyong Hahn;Shenghui Cui","doi":"10.1109/TASC.2025.3587992","DOIUrl":"https://doi.org/10.1109/TASC.2025.3587992","url":null,"abstract":"Combining metal-insulation high-temperature superconductor (MI-HTS), power electronics presents a promising potential to implement reliable magnetic energy storage systems. A modern power converter, typically implemented as a voltage-source converter (VSC), utilizes power semiconductors with switching frequencies ranging from several kHz to hundreds of kHz. From a VSC design perspective, analyzing the current flowing into power semiconductors at the microsecond timescale is essential to prevent converter failure due to overcurrent. Thus, to reduce the risk of operation failure of VSC, it is crucial to simulate the operation of VSC with MI-HTS not only the long-term behavior but also the short-term dynamics before commissioning. This article presents a practical method to develop an equivalent circuit of MI-HTS, enabling the replication of its current response at the microsecond timescale within electromagnetic transient simulations. This circuit can be used to verify the operation of MI-HTS and VSC, including control algorithms, by considering characteristics of leakage currents in MI-HTS under pulsed voltage from the VSC. The proposed method utilizes measured frequency response data and a rational approximation algorithm to extract an equivalent circuit. The proposed procedure is validated through a comparison of simulated and experimental results from closed-loop current control of a 37.2 mH MI-HTS coil driven by a VSC with a switching frequency of 2 kHz.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 7","pages":"1-11"},"PeriodicalIF":1.8,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144831788","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

Investigation of Wetting Property and Joint Fabrication Pressure on the Resistance and Microstructure of Soldering Joints for REBCO Conductors 润湿性能和接头制造压力对REBCO导体焊接接头电阻和微观结构的影响

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-07-10 DOI: 10.1109/TASC.2025.3587640

Hongli Suo;Yang Gao;Xiaoru Tian;Zili Zhang;Hongbo Sun;Jianhua Liu;Lei Wang;Qiuliang Wang

引用次数: 0

Development of a 30-kW Class High-Speed Superconducting Generator Prototype With a Novel Hybrid-Excitation Method for Electric Aviation Propulsion 航空电力推进用新型混合激励30kw级高速超导发电机样机的研制

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-07-08 DOI: 10.1109/TASC.2025.3586954

Juzhuang Yan;Wenjiang Yang;Xuefeng Zhang;Dongbin Song;Mingliang Bai

{"title":"Development of a 30-kW Class High-Speed Superconducting Generator Prototype With a Novel Hybrid-Excitation Method for Electric Aviation Propulsion","authors":"Juzhuang Yan;Wenjiang Yang;Xuefeng Zhang;Dongbin Song;Mingliang Bai","doi":"10.1109/TASC.2025.3586954","DOIUrl":"https://doi.org/10.1109/TASC.2025.3586954","url":null,"abstract":"With the development of aviation propulsion toward a hybrid electric propulsion system, a superconducting machine plays an important role with the high power density and high efficiency. In this article, a 30-kW 10 200-r/min superconducting homopolar generator prototype is designed to meet the high speed requirement of electric aviation. And a superconducting hybrid-excitation method based on permanent magnet auxiliary excitation is proposed to alleviate the issue of magnetic saturation in the homopolar rotor. The no-load and load output characteristics of the prototype under electric excitation, permanent magnet excitation, and hybrid excitation are tested experimentally. The results revealed out that the output power of hybrid excitation type is significantly better than the sum of output power of electric excitation type and permanent magnet type. The phenomenon was reasonably explained by analyzing the magnetic flux distribution of different types of rotors through finite-element simulation. The research provides an important design basis for the future design of megawatt high-speed superconducting generators for aviation electric propulsion and green aviation.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 7","pages":"1-11"},"PeriodicalIF":1.8,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814144","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

Investigation of Transport AC Loss Characteristics in a Double-Layer Tenon–Mortise Modularized Conductor (TMMC) 双层榫卯模块化导体（TMMC）输运交流损耗特性研究

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-07-07 DOI: 10.1109/TASC.2025.3586316

Yuhan Yang;Jinxing Zheng;Lei Wang;Yuan Cheng;Ming Li

{"title":"Investigation of Transport AC Loss Characteristics in a Double-Layer Tenon–Mortise Modularized Conductor (TMMC)","authors":"Yuhan Yang;Jinxing Zheng;Lei Wang;Yuan Cheng;Ming Li","doi":"10.1109/TASC.2025.3586316","DOIUrl":"https://doi.org/10.1109/TASC.2025.3586316","url":null,"abstract":"The accurate evaluation of the ac loss is considered to be of great importance for the design and optimization of high-temperature superconducting (HTS) conductors. Along these lines, a new type of HTS conductor named tenon–mortise modularized conductor (TMMC), composed of a multilayer concentric round subconductor, was developed. Notably, the tenon–mortise connection structure of the TMMC requires a large amount of copper formers, significantly modifying its ac loss characteristics. Initially, a 2-D model for the TMMC was established to analyze the ac loss evaluation under sinusoidal current. The simulations demonstrated that the hysteresis loss in the tapes of the copper-former TMMC was the predominant component of ac loss at lower transport current frequencies. However, as the current frequency increased, the current and losses in the copper formers significantly rose. Subsequently, the ac loss of the TMMC with copper formers under low-frequency triangular wave current was evaluated through experimental and simulation methods. The results indicated that under varying current amplitudes and frequencies, the experimental and simulation results of ac loss exhibit a consistent trend, with an average numerical error of approximately 32.2%. Collectively, our work provides valuable insights for the optimization of TMMC designs and offers guidance for future research and applications in high-field magnet and power system technologies.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 7","pages":"1-8"},"PeriodicalIF":1.7,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680858","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

The Torus Axial Flux Machine: Unlocking a Low-Loss Superconducting Armature? 环面轴向磁通机：解锁低损耗超导电枢？

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-07-03 DOI: 10.1109/TASC.2025.3585976

Runar Mellerud;Christian Hartmann;Casper Leonard Klop;Rémi Dorget;Jonas Kristiansen Nøland

{"title":"The Torus Axial Flux Machine: Unlocking a Low-Loss Superconducting Armature?","authors":"Runar Mellerud;Christian Hartmann;Casper Leonard Klop;Rémi Dorget;Jonas Kristiansen Nøland","doi":"10.1109/TASC.2025.3585976","DOIUrl":"https://doi.org/10.1109/TASC.2025.3585976","url":null,"abstract":"High-temperature superconductors (HTSs) could enable a new paradigm for lightweight and efficient electric machine designs. While superconducting rotors have been successfully implemented, the adoption of superconducting armatures has been hindered by high ac losses, leading to impractically high cryogenic cooling demands. This article introduces a slotted torus axial flux machine topology to address this challenge, leveraging toroidal windings to align HTS tapes with slot leakage flux, avoiding complex end windings while achieving ac losses at least an order of magnitude below HTS armatures with tooth-coil tape orientation. A 1-MW proof-of-concept aviation motor design demonstrates the feasibility of this approach, achieving an active torque density of 51.1 Nm/kg with HTS ac losses below 0.03% of the output power and total cryogenic losses slightly exceeding 0.1% when including the steel losses. The study highlights the importance of HTS tape orientation within the slot and using flux diverters for the end windings to minimize losses. Furthermore, it illustrates how an even higher cryogenic efficiency can be reached by lowering the electrical frequency. The promising results motivate further development and optimization of superconducting machines with this topology.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 7","pages":"1-10"},"PeriodicalIF":1.7,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680841","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