IEEE Transactions on Applied Superconductivity最新文献_第2页

Experimental Demonstration of 1.2-Gb/s/Channel Readout Operation of Josephson–CMOS Hybrid Memory 约瑟夫森-CMOS 混合存储器 1.2 GB/秒/通道读出操作的实验演示

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-22 DOI: 10.1109/TASC.2024.3485097

Yuki Hironaka;Nobuyuki Yoshikawa

{"title":"Experimental Demonstration of 1.2-Gb/s/Channel Readout Operation of Josephson–CMOS Hybrid Memory","authors":"Yuki Hironaka;Nobuyuki Yoshikawa","doi":"10.1109/TASC.2024.3485097","DOIUrl":"https://doi.org/10.1109/TASC.2024.3485097","url":null,"abstract":"In this study, we aimed to achieve high-speed readout operations of Josephson–CMOS hybrid memory. We first experimentally evaluated the timing margin in the readout operations of the hybrid memory. In single-channel bit line measurements, we confirmed that the hybrid memory could work at a 1-GHz memory clock frequency with a timing margin as high as 0.63 ns. Subsequently, we designed and measured a Josephson–CMOS hybrid accumulator circuit to demonstrate high-speed read operations of the hybrid memory. The core design of the Josephson–CMOS hybrid memory follows our previous design. We introduced a sequential-access read-only CMOS memory and a single-flux-quantum accumulator into a test circuit, enabling high-speed measurement of Josephson–CMOS hybrid memory with only two high-speed external inputs. We designed and fabricated a test circuit using the Rohm 180-nm CMOS process and the AIST-ADP2 Josephson process. In the measurement, we achieved correct operation of the test circuit, including the readout operation of the 32-b hybrid memory at a memory clock frequency as high as 1.2 GHz, corresponding to a 38.4-Gb/s readout.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 1","pages":"1-9"},"PeriodicalIF":1.7,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636405","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

A New Variable Flux Partitioned-Stator Flux Modulation Machine With Multiple Excitations 新型多激励可变磁通分区定子磁通调制器

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-21 DOI: 10.1109/TASC.2024.3484332

Yao Meng;Yanzheng Zhu;Shuhua Fang;Hong Chen;Yuxiang Zhong

引用次数: 0

Enhanced Dielectric Performance of Polypropylene Film by Surfacing Grafting and Crosslinking for Metalized Film Capacitors 通过表面接枝和交联增强聚丙烯薄膜的介电性能，用于金属化薄膜电容器

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-21 DOI: 10.1109/TASC.2024.3484329

Meng Xiao;Zhiyuan Zhang;Boxue Du;Bin Wang;Jianmei Cao

引用次数: 0

Study on Partial Discharge Characteristics of Metallized Film Following Self-Healing in Power Capacitors 功率电容器中金属化薄膜自愈合后的局部放电特性研究

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-21 DOI: 10.1109/TASC.2024.3484334

Meng Xiao;Liangtian Zhang;Xiaodan Du;Duoqing Zhao;Bo Xue Du

{"title":"Study on Partial Discharge Characteristics of Metallized Film Following Self-Healing in Power Capacitors","authors":"Meng Xiao;Liangtian Zhang;Xiaodan Du;Duoqing Zhao;Bo Xue Du","doi":"10.1109/TASC.2024.3484334","DOIUrl":"https://doi.org/10.1109/TASC.2024.3484334","url":null,"abstract":"Metallized film capacitors (MFCs) is the essential components of the superconducting magnetic energy storage (SMES) system. In this paper, a polymer insulation film partial discharge(PD) experimental system is established to explore the PD characteristics of biaxially oriented polypropylene (BOPP) and metallized films based on the simulation of insulation defects formed after the self-healing in MFCs. As the size and quantity of defects increase, the distortion of the electric field intensifies, thereby facilitating the occurrence of PD. However, the PD amplitude of the metallized film decreased by about 10%. The PD of BOPP films is mainly internal discharge. The metallized film initially occurs surface discharge. With the applied voltage increasing, the intensity of internal discharge amplifies. Self-healing and PD will cause the loss of electrodes, leading to the degradation in capacitor performance. The difference in PD characteristics between BOPP and metallized films is attributed to the excellent conductivity of the metallized film surface. This property promotes diffusion and combination of the space charge, while reducing the accumulation of charges in the defects. Thus the electric field distortion is reduced, which makes PD more difficult to occur and less intensive.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-4"},"PeriodicalIF":1.7,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573634","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 and Investigation of a New Torque-Enhanced Flux Modulated Permanent Magnet Arc Motor With Flux-Concentrated Stator PMs 带磁通集中定子永磁发电机的新型扭矩增强型磁通调制永磁弧形电机的设计与研究

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-21 DOI: 10.1109/TASC.2024.3484333

Nan Chen;Shuhua Fang

{"title":"Design and Investigation of a New Torque-Enhanced Flux Modulated Permanent Magnet Arc Motor With Flux-Concentrated Stator PMs","authors":"Nan Chen;Shuhua Fang","doi":"10.1109/TASC.2024.3484333","DOIUrl":"https://doi.org/10.1109/TASC.2024.3484333","url":null,"abstract":"This article proposes an innovative flux modulated permanent magnet (PM) arc motor enhanced with flux-concentrated stator PMs (FCS-FMPMAM). With the primary goal of increasing the average torque output, the FCS-FMPMAM incorporates a set of flux-focused stator PMs. This article initially introduces the configuration and performance of the FCS-FMPMAM. The combination of the flux-switching PMs, consequent-pole PMs and PMs in the stator yoke is beneficial to generate abundant harmonics and bolster the triple flux-modulation effect. Then, the optimal rotor pole number of the proposed machine is analyzed and selected. The sensitivity analysis is performed on the design parameters of FCS-FMPMAM for the consequent optimization of the torque performance of FCS-FMPMAM. This facilitates the subsequent torque performance optimization of FSC-FMPMAM. Based on the multi-objective evolutionary algorithm, the torque capabilities of FCS-FMPMAM are optimized to obtain the maximized average torque output and the minimized torque ripple. The optimized machine is analyzed under different PM excitation conditions to reveal the superiority of the proposed PM arrangement. Finally, the proposed machine is compared with an existing flux-modulated stator-PM arc motor in electromagnetic performances with finite element analysis method to exhibit the superiority of FCS-FMPMAM.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-4"},"PeriodicalIF":1.7,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587557","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

Improved PWM Switching Scheme to Mitigate Power Loss and Switch Temperature of CHB Inverters 改进 PWM 开关方案以降低 CHB 逆变器的功率损耗和开关温度

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-14 DOI: 10.1109/TASC.2024.3469848

Sadia Afrin;Shuvra Prokash Biswas;Sudipto Mondal;Md. Rabiul Islam;Rakibuzzaman Shah

引用次数: 0

Design of an Electromagnetic Suspension System Based on a New Type of High-Temperature Superconducting and Normal Conducting Hybrid Electromagnet 基于新型高温超导和常导混合电磁铁的电磁悬挂系统设计

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-14 DOI: 10.1109/TASC.2024.3480034

Deming Huang;Chaoqun Jiao;Jin Fang

引用次数: 0

Crystallization Regulation of Cross-Linking Polypropylene on Dielectric Performance for Capacitors in SMES 交联聚丙烯的结晶调节对 SMES 电容器介电性能的影响

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-14 DOI: 10.1109/TASC.2024.3479796

Meng Xiao;Yuyan Chen;B. X. Du;Sihua Liu;Li Wan

引用次数: 0

A Custom Finite-Element Method Framework for Designing Superconducting Solenoidal Magnets and Coils With True HTS Tape Geometry 设计具有真正 HTS 磁带几何形状的超导螺线管磁铁和线圈的定制有限元法框架

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-07 DOI: 10.1109/TASC.2024.3475949

Stavros P. Filippidis;Theodoros Theodoulidis;Aggelos S. Bouhouras;Antonio Morandi;Georgios C. Christoforidis

{"title":"A Custom Finite-Element Method Framework for Designing Superconducting Solenoidal Magnets and Coils With True HTS Tape Geometry","authors":"Stavros P. Filippidis;Theodoros Theodoulidis;Aggelos S. Bouhouras;Antonio Morandi;Georgios C. Christoforidis","doi":"10.1109/TASC.2024.3475949","DOIUrl":"https://doi.org/10.1109/TASC.2024.3475949","url":null,"abstract":"Superconducting solenoidal magnets are employed in magnetic resonance imaging and superconducting magnetic energy storage systems. Numerical methods are mandatory to optimize their design and predict their performance. Implementing the finite-element method (FEM) on the actual geometry of a high-temperature superconductor (HTS) tape is challenging due to the large aspect ratio of the tape, which creates meshing difficulties. In this article, we address this challenge by developing a custom FEM framework tailored specifically for this application, with a focus on speed and easy integration into optimization algorithms. A novel approach is adopted, representing the geometry of a coil-turn of HTS tape using a single point on the 2D plane. Each point corresponds to a matrix, serving both as an algebraic storage medium and the geometrical representation of the tape. The matrix cells possess imaginary dimensions that form the geometry of the coil-turn, eliminating the need for traditional meshing. The code of the framework is optimized to increase efficiency and utilize multiple cores of the processor. Results are compared with those obtained from COMSOL, verifying the framework's accuracy. A large magnet is designed to assess the computation efficiency. The successful application of this custom FEM framework in optimization routines opens new pathways for designing and predicting the performance of superconducting solenoidal magnets.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 9","pages":"1-11"},"PeriodicalIF":1.7,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518011","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

Intelligent Inspection System for Power Insulators Based on AAV on Complex Weather Conditions 复杂天气条件下基于 AAV 的电力绝缘子智能检测系统

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-10-07 DOI: 10.1109/TASC.2024.3465368

Yi Li;Yanfeng Lu;Kaixin Wu;Yuan Fang;Chaodan Zheng;Jiangang Zhang

引用次数: 0