IEEE Transactions on Dielectrics and Electrical Insulation最新文献_第9页

Long-Term AC Partial Discharge Characteristics till Dielectric Breakdown in an Aged 22 kV Cast Resin Transformer 老化 22 kV 浇注树脂变压器的长期交流局部放电特性直至介质击穿

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-07-09 DOI: 10.1109/tdei.2024.3425312

Mizuki Miyagawa, Yuanhang Yao, Hideaki Kawano, Masayuki Hikita, Masahiro Kozako, Yoshihiro Harada, Katsutoshi Takei, Masaru Ikeda, Kazunori Miyazaki, Kazuhiro Futakawa

引用次数: 0

Characteristics Analysis and Domain-Adaptive Recognition Methodology of Partial Discharge for C4F7N/CO2 Eco-Friendly GIS C4F7N/CO2 生态友好型 GIS 的局部放电特性分析和域自适应识别方法

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-07-09 DOI: 10.1109/tdei.2024.3425315

Zhuoxiao Li, Yiming Zang, Ze Li, Tiancheng Huang, Weihao Sun, Yongpeng Xu, Xiuchen Jiang

引用次数: 0

Ultrasonic Detection and Diagnostic Method for the Internal Defects in Epoxy Composite 环氧树脂复合材料内部缺陷的超声波检测和诊断方法

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-07-09 DOI: 10.1109/tdei.2024.3425316

Peng Liu, Jiahao Li, Zhiwei Ye, Zehua Wu, Ning Qiu, Boyuan Cui, Jianwei Wei, Zongren Peng

引用次数: 0

Exploring Polyelectrolyte Multilayers Deposited on Corona-Charged Porous Composite Polylactic Acid/Poly(ε-Caprolactone) Substrates for Enhanced Drug Delivery Systems 探索沉积在带电晕的多孔复合聚乳酸/聚(ε-己内酯)基底上的聚电解质多层膜，用于增强药物输送系统

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-07-05 DOI: 10.1109/TDEI.2024.3423050

Temenuzhka Yovcheva;Asya Viraneva;Maria Marudova;Aleksandar Grigorov

引用次数: 0

The Coalescence of Charged and Uncharged Drops Under Electric Field 带电和不带电液滴在电场下的凝聚

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-07-04 DOI: 10.1109/TDEI.2024.3423048

Wikanda Nantanawut;Boonchai Techaumnat;Nutthaphong Tanthanuch

{"title":"The Coalescence of Charged and Uncharged Drops Under Electric Field","authors":"Wikanda Nantanawut;Boonchai Techaumnat;Nutthaphong Tanthanuch","doi":"10.1109/TDEI.2024.3423048","DOIUrl":"10.1109/TDEI.2024.3423048","url":null,"abstract":"Electrocoalescence is an application of drop electrokinetics. It can be used for the separation of an aqueous phase from an oil phase. In the electrocoalescence process, small water drops, which are dispersed in an oil phase, are promoted to aggregate into a bulk aqueous phase by the electric field. The existing studies focus on the electrocoalescence of either charged or uncharged drops. However, the coalescence behavior has not been clarified comparatively for charged and uncharged water drops in the same oil phase. In this work, we have performed an experiment to observe the coalescence of charged and uncharged drops with an oil-water interface under a dc pulsed electric field. A deionized (DI) water drop is injected into an oil phase for coalescence with a water plane below to observe the drop behavior and determine the effects of charge and electric field on the coalescence. In addition, mineral oil and silicone oil are used as the oil phase to investigate the effect of the medium properties, the interfacial tension coefficient, and the permittivity, which have opposite effects on the coalescence. The results demonstrate that an increase in the electric field accelerates the drop movement, but the deformation of the drop also increases, leading to partial coalescence. The stability of the drop and the coalescence in silicone oil are better compared to those of mineral oil due to the predominant interfacial tension property. Due to the effect of charge, the electrical force is increased, enhancing the coalescence time. However, noncoalescence or disintegration can occur at high electric field when using charged drop in the oil with low interfacial tension.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 5","pages":"2477-2484"},"PeriodicalIF":2.9,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation and Fabrication of PMN-PT Single Crystals Phased Array Ultrasonic Transducer Based on Alternating and Direct Current Poling 基于交流和直流极化的 PMN-PT 单晶相控阵超声换能器的仿真与制造

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-07-04 DOI: 10.1109/TDEI.2024.3423049

Jialin Xu;Cheng Du;Yuan Xue;Li Wang;Hao Zhang;Fei Wu;Guanglin Li;Peng Fang

{"title":"Simulation and Fabrication of PMN-PT Single Crystals Phased Array Ultrasonic Transducer Based on Alternating and Direct Current Poling","authors":"Jialin Xu;Cheng Du;Yuan Xue;Li Wang;Hao Zhang;Fei Wu;Guanglin Li;Peng Fang","doi":"10.1109/TDEI.2024.3423049","DOIUrl":"10.1109/TDEI.2024.3423049","url":null,"abstract":"In this article, the design, fabrication, and comparison of Pb(Mg1/3 Nb2/3) O3-0.25PbTiO3 (PMN-0.25PT) single crystals (SCs) by alternating current poling (ACP) and direct current poling (DCP)-based 2.8-MHz phased array ultrasonic transducers were investigated. Pzflex finite element simulation was used to model and compare the electro-acoustic properties of ACP and DCP phased arrays. The finite element analysis (FEA) results indicated that the ACP phased arrays can exhibit a greater sensitivity, a broader -6-dB bandwidth (BW), and a lower center frequency under the same acoustic structure and the same thickness of matching layers. In addition, the high coincidence of simulated and measured impedance proves the stability of the transducer fabrication processes. By comparing the permittivity of the SCs in the processes of transducer fabrication, it is shown that the ACP SCs are more sensitive to the clamping force during the pressurization process and to the cutting force during the dicing process, respectively. Compared with the DCP phased arrays, the ACP phased arrays have been shown to exhibit 7.90% increase in observed -6-dB BW and 0.82-dB increase in relative sensitivity (RS). These results suggest that ACP phased arrays can enhance both the longitudinal resolution and penetration depth of ultrasonic imaging. Finally, a typical phantom image is created to compare the imaging capabilities of ACP and DCP phased arrays. The findings indicate that phased arrays based on ACP PMNT SCs might be promising for medical ultrasound (US) imaging applications.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 5","pages":"2321-2329"},"PeriodicalIF":2.9,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prerequisites for Accelerated Aging of Transformer Oil: A Review 变压器油加速老化的先决条件：综述

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-07-04 DOI: 10.1109/tdei.2024.3423051

Nur Amirah Othman, Hidayat Zainuddin, Muhammad Sharil Yahaya, Norhafiz Azis, Zulkifli Ibrahim

引用次数: 0

Characteristics of Electrical Tree Growing on Gel-Substrate Surface for Power Module at High Frequency Positive Square Wave Voltage 高频正方波电压下功率模块凝胶基底表面上生长的电气树的特性

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-07-04 DOI: 10.1109/tdei.2024.3423052

He Li, Haibao Mu, Huanmin Yao, Yang Yang, Xin Zhao, Zhiyuan Qian, Chengshan Liu, Guanjun Zhang

引用次数: 0

Review of High Voltage Instrument Transformer Condition Monitoring 高压互感器状态监测回顾

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-07-03 DOI: 10.1109/tdei.2024.3422260

Sajjad Asefi, Bilal Asad, Madis Leinakse, Henri Manninen, Jako Kilter, Toomas Vaimann, Ants Kallaste, Marko Tealane, Mart Landsberg

引用次数: 0

Enhancement and Prediction of Mechanical Properties of Microcellulose/ Nanocellulose-Modified Insulating Paper 微/纳米纤维素改性绝缘纸机械性能的增强与预测

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-07-02 DOI: 10.1109/TDEI.2024.3422159

Xinnan Zhai;Daning Zhang;Xuan Li;Xianjun Shao;Tianbo Zhang;Jiangyang Zhan;Haoxiang Zhao;Haibao Mu;Guan-Jun Zhang

{"title":"Enhancement and Prediction of Mechanical Properties of Microcellulose/ Nanocellulose-Modified Insulating Paper","authors":"Xinnan Zhai;Daning Zhang;Xuan Li;Xianjun Shao;Tianbo Zhang;Jiangyang Zhan;Haoxiang Zhao;Haibao Mu;Guan-Jun Zhang","doi":"10.1109/TDEI.2024.3422159","DOIUrl":"10.1109/TDEI.2024.3422159","url":null,"abstract":"The insulating paper in oil-paper insulated transformers is subjected to significant mechanical vibration and mechanical shock, putting considerable demands on the insulating paper’s strength and resistance to deformation. Therefore, effective enhancement and accurate prediction of mechanical properties are crucial in the application of cellulose-insulating paper. In this article, modified insulating paper with different mass fractions of cellulose nanowhiskers (CNWs), nanofibrillated cellulose (NFC), and microfibrillated cellulose (MFC) are prepared. The microscopic morphology, stress-strain curves, and Young’s modulus of the modified insulating paper are measured. The modification effects of microcellulose/nanocellulose with different aspect ratios on the mechanical properties of the insulating paper are compared. 10 wt% mass fraction of CNW-modified paper exhibits the highest Young’s modulus with an enhancement of 11.99%. The mechanism of microcellulose/nanocellulose modification on insulating paper is analyzed in terms of its strength, morphology, interface, and agglomeration. The prediction of Young’s modulus of modified insulating paper under different doping concentrations is realized based on the Halpin-Tsai model for filler modification under ideal conditions, considering the effects of agglomerated and interfacial phases, on the basis of detailed experimental results and comprehensive analysis. Experimental validation shows that the error of the proposed prediction model is less than 1.57%. This study is very beneficial for nano-modification and mechanical property enhancement of cellulose paper.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 5","pages":"2642-2651"},"PeriodicalIF":2.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0