IEEE Transactions on Applied Superconductivity最新文献_第10页

Measurement and Analysis of Induced Voltage in a Rotating Coordinate System of a 1 kW-Class High Temperature Superconducting Squirrel-Cage Rotor Winding 1 kw级高温超导鼠笼式转子绕组旋转坐标系中感应电压的测量与分析

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-20 DOI: 10.1109/TASC.2026.3666465

C. N. D’Azevedo;T. Nakamura

{"title":"Measurement and Analysis of Induced Voltage in a Rotating Coordinate System of a 1 kW-Class High Temperature Superconducting Squirrel-Cage Rotor Winding","authors":"C. N. D’Azevedo;T. Nakamura","doi":"10.1109/TASC.2026.3666465","DOIUrl":"10.1109/TASC.2026.3666465","url":null,"abstract":"This work presents a simple and direct measurement method for rotor bar voltages in the rotating coordinate system of a high temperature superconducting induction/synchronous motor (HTS-ISM). The arrangement consists of soldering copper wires to the opposing ends of the rotor bars and routing them through a spinning reel to avoid entanglement, thereby providing a continuous electrical connection between the rotating quantities of the rotor and the stationary measurement instruments. Experiments with both ramped and stepped stator voltage inputs under no-load conditions revealed markedly different dynamic behaviors, including rapid acceleration, hunting torque, and current distortion. A recurring component at <inline-formula><tex-math>$ approx $</tex-math></inline-formula>1.05 Hz was consistently identified on the rotor bar voltages across independent tests, including at different input frequencies, suggesting the presence of an intrinsic oscillation under low excitation. The proposed measurement approach provides new experimental access to the flux-flow and synchronous regimes of HTS machines and establishes a foundation for future studies under load and with varied rotor designs.","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":"148507388","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 of High-Quality YBCO Thin Films Deposited by PLD as a Function of Thickness PLD沉积高质量YBCO薄膜厚度的优化

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-12 DOI: 10.1109/TASC.2026.3652031

Violetta Poletto Dotsenko;Antonella Mancini;Achille Angrisani Armenio;Alessandro Rufoloni;Alessandra Fava;Giovanni Sotgiu;Francesco Rizzo

引用次数: 0

Design of Shortened REBa2Cu3O7-δ Saddle-Shaped Field Coil Ends for Fully Superconducting Synchronous Motors Using Generalized Flatwise Curvature 基于广义平面曲率的全超导同步电机用缩短REBa2Cu3O7-δ鞍形磁场线圈端部设计

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2025-12-19 DOI: 10.1109/TASC.2025.3645158

R. Konishi;Y. Emori;R. Ozumi;H. Handa;H. Miyazaki;S. Miura;H. Sasa;M. Iwakuma

{"title":"Design of Shortened REBa2Cu3O7-δ Saddle-Shaped Field Coil Ends for Fully Superconducting Synchronous Motors Using Generalized Flatwise Curvature","authors":"R. Konishi;Y. Emori;R. Ozumi;H. Handa;H. Miyazaki;S. Miura;H. Sasa;M. Iwakuma","doi":"10.1109/TASC.2025.3645158","DOIUrl":"10.1109/TASC.2025.3645158","url":null,"abstract":"To reduce carbon dioxide emissions from aircraft, superconducting electric propulsion systems are attracting attention. For aircraft, high power density is particularly important, and increasing the power density requires higher rotational speed. Therefore, we are studying a saddle-shaped field coil made with REBa2Cu3O7-δ (REBCO) tape. This coil can be fixed directly to the shaft, which helps provide the mechanical strength needed for high-speed rotation. However, because of the shape characteristics of the REBCO tape, the coil ends tend to become long, increasing the axial length of the motor. In addition, excessive bending or twisting can damage the tape; thus, careful design is necessary. In this study, we developed a design method to shorten the saddle-shaped field coil and evaluated its electromagnetic performance. We introduced a generalized flatwise curvature to represent bending and twisting and set the allowable curvature of the REBCO tape to 0.1 mm-1 based on its mechanical limits. Using this condition, we designed two types of shortened coils. Model A arranges the coils based on the curvature of the innermost coil, while Model B equalizes the curvature of all coils to prevent interference at the coil ends. Three-dimensional finite-element analysis revealed that the axial gap flux density distribution of both models is almost the same. However, Model B has a slightly larger high-flux-density region because its straight part is longer, resulting in better output performance. The obtained torque also exhibits a strong proportional relationship with the axial integral of the gap flux density, confirming that the coil ends are important regions that contribute to motor output.","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":"145830802","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

Enhanced Superconducting Performance in PbMo6S8 Bulk Materials via a Novel Processing Technique 一种新型加工技术增强PbMo6S8块体材料的超导性能

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2025-12-18 DOI: 10.1109/TASC.2025.3645723

Botao Shao;Guobiao Kang;Jixing Liu;Shengnan Zhang;Zhenyu Chen;Lei Zhi;Qingyang Wang;Jianfeng Li;Pingxiang Zhang

{"title":"Enhanced Superconducting Performance in PbMo6S8 Bulk Materials via a Novel Processing Technique","authors":"Botao Shao;Guobiao Kang;Jixing Liu;Shengnan Zhang;Zhenyu Chen;Lei Zhi;Qingyang Wang;Jianfeng Li;Pingxiang Zhang","doi":"10.1109/TASC.2025.3645723","DOIUrl":"10.1109/TASC.2025.3645723","url":null,"abstract":"To optimize the superconducting properties of PbMo6S8 (PMS) bulks, we refined the precursor stoichiometry and applied a controlled heat-treatment method—slow ramping, multi-step holds, and a low-vacuum atmosphere—that ensures complete reaction and uniform phase formation in the Pb–Mo–S system. Microstructural analysis, phase-composition characterization, and superconducting performance evaluation were carried out. Results reveal that in this work PMS prepared from elemental Pb, Mo and S powders reaches a sharp superconducting transition at a superconducting transition temperature (<italic>Tc) about 14 K and the critical current density (<italic>Jc) was 4 × 104 A cm−2 at 4.2 K, self-field. The enhanced performance is attributed to a synergistic flux-pinning effect. The refined grain structure increases the grain-boundary density, while nanometer-scale lattice distortions and dislocations—whose characteristic size matches the superconducting coherence length ξ ≈ 2 nm—act as additional strong pinning centers. Consequently, point and surface pinning operate concurrently, markedly improving <italic>Jc under applied magnetic fields. These findings provide a practical route for fabricating high-performance PMS superconductors through elemental-powder processing.","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":"145886664","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

Mesoscopic S/F/S Trilayers in Parallel Magnetic Fields 平行磁场中的介观S/F/S三层

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-29 DOI: 10.1109/TASC.2026.3659452

Mikhail Belogolovskii;Magdaléna Poláčková;Elena Zhitlukhina;Branislav Grančič;Leonid Satrapinskyy;Pavol Ďurina;Maroš Gregor;Tomáš Plecenik

{"title":"Mesoscopic S/F/S Trilayers in Parallel Magnetic Fields","authors":"Mikhail Belogolovskii;Magdaléna Poláčková;Elena Zhitlukhina;Branislav Grančič;Leonid Satrapinskyy;Pavol Ďurina;Maroš Gregor;Tomáš Plecenik","doi":"10.1109/TASC.2026.3659452","DOIUrl":"10.1109/TASC.2026.3659452","url":null,"abstract":"We report on the fabrication and study of NbN/F/NbN trilayers with NbN films of 80-nm thickness, which is much larger than the coherence length but significantly smaller than the London penetration depth, and 50-nm-thick ferromagnetic (F = Ni or NiCu alloy) interlayers, along with 160-nm-thick single layers of NbN as a reference. The heterostructures were patterned into square shapes to enable nonlocal four-probe resistive measurements. This technique, previously applied to single-layer NbN films, allows for the simultaneous and independent probing of surface and bulk superconducting transitions in one measurement run. By comparing NbN and NbN/F/NbN trilayers, we demonstrate that the inclusion of a ferromagnetic interlayer leads to a significant shift in the onset of the superconducting transition, particularly in the near-surface region of the trilayer, and increases the overall transition width. This behavior is consistent with the concept of the electromagnetic proximity effect, predicted theoretically and, thanks to a new measurement strategy that distinguishes between surface and bulk contributions, provides evidence for its presence. The work provides insights into the delicate interplay between superconductivity and magnetism and opens pathways for engineering related interface-sensitive spintronic devices.","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":"146175690","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

Achieving High and Isotropic Pinning in Multilayer BaZrO3/YBa2Cu3O7-x Films 在多层BaZrO3/YBa2Cu3O7-x薄膜中实现高各向同性钉钉

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.2026.3651418

Aafiya;Victor Ogunjimi;Mary Ann Sebastian;Mohan Panth;Benson Tsai;Abhijeet Chowdhury;Jialong Huang;Timothy Haugan;Haiyan Wang;Judy Wu

{"title":"Achieving High and Isotropic Pinning in Multilayer BaZrO3/YBa2Cu3O7-x Films","authors":"Aafiya;Victor Ogunjimi;Mary Ann Sebastian;Mohan Panth;Benson Tsai;Abhijeet Chowdhury;Jialong Huang;Timothy Haugan;Haiyan Wang;Judy Wu","doi":"10.1109/TASC.2026.3651418","DOIUrl":"10.1109/TASC.2026.3651418","url":null,"abstract":"In a recently developed multilayer (ML) scheme, two or more 10-nm thick Ca0.3Y0.7Ba2Cu3O7-x spacers were inserted into BaZrO3-doped YBa2Cu3O7-x (BZO/YBCO) films to enable dynamic diffusion of Ca ions from the spacers to BZO/YBCO layers. In these ML BZO/YBCO nanocomposite films, significantly enhanced pinning has been attributed to Ca/Cu substitution on the Cu-O planes of YBCO, leading to reduced lattice mismatch and hence defects at the BZO/YBCO interface. In this work, we further probe the Ca diffusion in the five-layer ML films by varying the thickness of the two Ca0.3Y0.7Ba2Cu3O7-x spacers in the range of 1 nm-10 nm and also the thickness of the three BZO/YBCO layers in the range of 50–330 nm. Ca diffusion has been found highly effective if the spacer layer thickness exceeds 2 nm and can diffuse through large BZO/YBCO thicknesses up to 330 nm (total film thickness ∼ 1 µm) along the BZO/YBCO interface. The critical current density exhibits enhanced and almost thickness-independent trends in the ML BZO/YBCO nanocomposite films. Significantly enhanced pinning is illustrated in up to 5 folds enhancement of <italic>Jc at 65 K and 9.0 T. At lower temperatures, the enhanced pinning extends to a broad range of the orientations of magnetic field (B). At 20 K and 9.0 T, the <italic>Ic is up to 654 A/cm-width at B//c, which is close to 753 A/cm-width at B//ab due to the intrinsic pinning, has been achieved. This result suggests that the ML scheme provides an interesting approach to improve pinning in nanocomposite films.","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":"146026322","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

Liquid-Assisted Growth in Non-Stoichiometric YBa2Cu3Oy+BaHfO3 Films for High-Rate Deposition with Enhanced Jc 液体辅助生长非化学计量YBa2Cu3Oy+BaHfO3膜的高速率增强Jc沉积

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-12 DOI: 10.1109/TASC.2026.3652116

Shunta Ito;Ataru Ichinose;Tomoya Horide;Yutaka Yoshida

{"title":"Liquid-Assisted Growth in Non-Stoichiometric YBa2Cu3Oy+BaHfO3 Films for High-Rate Deposition with Enhanced Jc","authors":"Shunta Ito;Ataru Ichinose;Tomoya Horide;Yutaka Yoshida","doi":"10.1109/TASC.2026.3652116","DOIUrl":"10.1109/TASC.2026.3652116","url":null,"abstract":"To achieve both high in-field critical current density (<italic>Jc) and high deposition rates in REBa2C3Oγ (REBCO) coated conductors, we investigated liquid-phase-assisted crystal growth using a non-stoichiometric target composition. Conventional pulsed laser deposition (PLD) with a stoichiometric target suffers from degradation of BaHfO3 (BHO) nanorod alignment at high deposition rates, resulting in a significant reduction in <italic>Jc. In this study, a newly designed target with the composition Y:Ba:Cu = 1:2.3:3.7 was employed to induce liquid-phase formation during PLD growth. Structural and compositional analyses revealed the presence of Cu-rich precipitates and microstructural features characteristic of liquid-mediated growth. The use of a YBCO+BHO seed layer prevented the reaction between Ba species and the CeO2 surface of the substrate. Consequently, the formation of BaCeO3 was effectively suppressed at elevated substrate temperatures. Furthermore, YBCO+BHO films grown from the non-stoichiometric target maintained well-aligned nanorods even at high deposition frequencies (100 Hz), exhibiting <italic>Jc values comparable to those of films deposited at low rates. These findings demonstrate that liquid-phase-assisted growth enabled by non-stoichiometric target design is an effective strategy for achieving both high <italic>Jc and high-rate deposition in REBCO films. This approach provides new insights into the control of liquid-phase formation in PLD processes and offers a promising pathway for cost-effective fabrication of high-performance coated conductors.","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":"146026388","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

Filled Thermoplastic Based Coating for Tailored Contact Resistance in HTS Coils 用于高温超导线圈中定制接触电阻的填充热塑性涂层

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-03-02 DOI: 10.1109/TASC.2026.3656161

Matteo Crescenti;Bernhard Auchmann;André Brem;Michał Duda;Jaap Kosse;Colin Müller;Kirtana Puthran;Henrique Rodrigues;Jürgen Schmidt;Carmine Senatore

{"title":"Filled Thermoplastic Based Coating for Tailored Contact Resistance in HTS Coils","authors":"Matteo Crescenti;Bernhard Auchmann;André Brem;Michał Duda;Jaap Kosse;Colin Müller;Kirtana Puthran;Henrique Rodrigues;Jürgen Schmidt;Carmine Senatore","doi":"10.1109/TASC.2026.3656161","DOIUrl":"10.1109/TASC.2026.3656161","url":null,"abstract":"We present a systematic method to tune the turn-to-turn contact resistance <inline-formula><tex-math>$R_{text{ct}}$</tex-math></inline-formula> in high-temperature superconducting (HTS) solenoids by applying a polyvinyl butyral (PVB) thermoplastic coating filled with silver-coated copper flakes (SCCF). The filler type and its volume fraction determines the accessible resistance range in the final coil. <inline-formula><tex-math>$R_{text{ct}}$</tex-math></inline-formula> strongly affects the charging dynamics and quench resilience of non-insulated (NI) HTS magnets, hence it is important to be able to control this parameter in a reliable and reproducible way. The coating is applied prior to winding in a continuous dip coating process and results in a dry polymeric film on the tape. After winding, the coating layers are fused above <inline-formula><tex-math>$60,^circ text{C}$</tex-math></inline-formula> and the final <inline-formula><tex-math>$R_{text{ct}}$</tex-math></inline-formula> is adjusted through the temperature and the duration of the heat-treatment. This method gives access to a wide range of <inline-formula><tex-math>$R_{text{ct}}$</tex-math></inline-formula>. Values from about 50 to <inline-formula><tex-math>$10^{6},mu Omega cdot text{cm}^{2}$</tex-math></inline-formula> can be obtained with the right choice of filler type, concentration and heat-treatment conditions. An 80-turn demonstrator solenoid fabricated using this approach and tested at <inline-formula><tex-math>$text{77},text{K}$</tex-math></inline-formula> achieved the targeted <inline-formula><tex-math>$R_{text{ct}}$</tex-math></inline-formula> of around <inline-formula><tex-math>$70,mu Omega cdot text{cm}^{2}$</tex-math></inline-formula>. A finite-element model, calibrated with the measured field-decay time, was used to extract the average turn-to-turn resistance and validate the tuning method.","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=11417927","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147362361","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

Direct Joining Method of Y-based high-Temperature Superconducting Tapes for Application to High-Current Conductors 应用于大电流导体的高温超导带的直接连接方法

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-21 DOI: 10.1109/TASC.2026.3651234

Daisuke Ohkura;Noriko Chikumoto;Michihiko Watanabe;Naoki Hirano;Yuta Onodera;Ryosuke Kodama

{"title":"Direct Joining Method of Y-based high-Temperature Superconducting Tapes for Application to High-Current Conductors","authors":"Daisuke Ohkura;Noriko Chikumoto;Michihiko Watanabe;Naoki Hirano;Yuta Onodera;Ryosuke Kodama","doi":"10.1109/TASC.2026.3651234","DOIUrl":"10.1109/TASC.2026.3651234","url":null,"abstract":"A low-temperature diffusion jointing technique based on citric-acid surface activation was applied to directly connect the Cu stabilizing layers of REBCO tapes, and its electrical characteristics were systematically investigated. The effects of joining conditions, such as, pressure, heating time, and joint length on interfacial resistivity were examined to identify the optimal jointing condition, which produced uniform and low-resistance Cu–Cu interfaces. <italic>I–V measurements confirmed that the critical current (<italic>Ic) and <italic>n-value of the jointed tapes showed no significant degradation compared with non-jointed conductors. When applied to two-tape stacked REBCO conductor, the <italic>Ic increased by about 1.7 times, indicating efficient current transfer through the joint region. These results demonstrate that the proposed citric-acid-assisted diffusion jointing method enables reliable electrical connections suitable for multi-tape REBCO conductors and provides a promising approach for practical high-temperature superconducting 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":"146175796","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

Comparative Analysis of Loss Characteristics in DCCTs at Cryogenic Temperature With HTS and Copper Compensation Windings 低温下高温超导和铜补偿绕组dcct损耗特性的比较分析

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-12 DOI: 10.1109/TASC.2026.3664063

Jin Lu;Pai Peng;Jianye Chen;Shutong Deng;Shengnan Zou;Yawei Wang;Yue Zhao;Zhijian Jin

{"title":"Comparative Analysis of Loss Characteristics in DCCTs at Cryogenic Temperature With HTS and Copper Compensation Windings","authors":"Jin Lu;Pai Peng;Jianye Chen;Shutong Deng;Shengnan Zou;Yawei Wang;Yue Zhao;Zhijian Jin","doi":"10.1109/TASC.2026.3664063","DOIUrl":"10.1109/TASC.2026.3664063","url":null,"abstract":"Accurate condition monitoring of high-temperature superconducting (HTS) cables in ultra-high-field magnets requires precise current measurement at cryogenic temperatures. Direct-Current Current Transformer (DCCT), a current measuring device based on zero-flux principle, is widely used as a high-precision measurement scheme. However, commercial DCCTs employing copper compensation coils exhibit significant operational losses at high currents, limiting their performance and range in low-temperature environments. To overcome this limitation, this paper proposes a conceptual design of an HTS compensated DCCT, an innovative approach to cryogenic current sensing. A comparative analysis of the loss characteristics between conventional copper and the proposed HTS compensation coil is conducted through finite element method (FEM) simulations. The results demonstrate that the copper coil generates losses 103 to 105 times greater than the HTS coil under high-current conditions. Consequently, the HTS compensated DCCT achieves a superior current range of up to 70 kA at 20 K, with virtually no steady-state loss and significantly reduced ramping loss. These findings confirm that the minimal loss characteristics of the HTS winding establish a promising solution for high-precision, high-current measurement in cryogenic applications.","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":"147440501","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