2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)最新文献

Assessing thermal and dielectric characteristics of healable, low-field illuminating optoelectronic stretchable material for electrical insulating purposes 评定电绝缘用可愈合、低场照明光电可拉伸材料的热学和介电特性

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905118

V. Nikolić, P. Kadlec, R. Polanský, Wang Guanxiang, Benjamin C. K. Tee

{"title":"Assessing thermal and dielectric characteristics of healable, low-field illuminating optoelectronic stretchable material for electrical insulating purposes","authors":"V. Nikolić, P. Kadlec, R. Polanský, Wang Guanxiang, Benjamin C. K. Tee","doi":"10.1109/Diagnostika55131.2022.9905118","DOIUrl":"https://doi.org/10.1109/Diagnostika55131.2022.9905118","url":null,"abstract":"An intrinsic self-healing material composed of poly-vinylidene-fluoride (PVDF) based fluoroelastomer with the addition of a small amount of non-ionic fluorinated surfactant was studied as a candidate material for electrical insulating purposes. Structural and thermal properties were analyzed with Fourier transform infrared spectroscopy and simultaneous thermal analysis. Broadband dielectric spectroscopy, volume and surface resistivity, and dielectric strength measurements provided a comprehensive overview of the dielectric properties. The material has a relatively high thermal stability (200 °C), a low dielectric strength of 13 kV/mm, and volume and surface resistivities of 1.07E+09 $Omegacdot$ cm and 1.94E+09 $Omega$, respectively. Due to various polarization effects, relative permittivity values are generally higher and increase with the loss factor at temperatures above 30 °c and at low frequencies (50 Hz). It was also found from high voltage testing that decomposition of the self-healing material was initiated by carbonization of the melt phase generated in the ignition area. Although a self-healing layer arises shortly after the destructive breakdown, the channel recovery activity is not consistent because of the material’s low viscosity. These initial results obtained on a novel dipole-dipole based self-healing material composite can serve as a reference point for further development – to reduce the overall polarity of the system and improve the dielectric properties, while maintaining its selfhealing ability.","PeriodicalId":374245,"journal":{"name":"2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"125 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123305820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Moisture Absorption of Glass-Epoxy Sandwich Structure 玻璃-环氧树脂夹层结构吸湿性能研究

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905216

A. Pietrikova, T. Lenger, L. Livovsky, I. Vehec, Peter Lukacs

{"title":"Moisture Absorption of Glass-Epoxy Sandwich Structure","authors":"A. Pietrikova, T. Lenger, L. Livovsky, I. Vehec, Peter Lukacs","doi":"10.1109/Diagnostika55131.2022.9905216","DOIUrl":"https://doi.org/10.1109/Diagnostika55131.2022.9905216","url":null,"abstract":"The authors discuss the comparison of two types of E-glass/epoxy sandwich structures for multi-layer PWB (Printed Wiring Boards) in relation to moisture absorption. Moisture diffusion characteristics based on measuring the mass change of l, 3, and 5 laminated layers were monitored at 40°C within multiple humidity tests at humidity levels from 5% RH to 85% RH. Based on the theoretically calculated time required for water absorption and desorption into epoxy samples filled with glass fibres, their absorption was experimentally confirmed depending on the thickness of the samples and also depending on the technology of their preparation (1 and 2 stage lamination of glass– epoxy laminated structure). From our experimental data, we obtained moisture saturation concentration at the humidity level from 5 % RH to 85% RH. The results of our analysis have shown that although epoxy constructions exhibit increased resistance to moisture penetration, it is not possible to completely prevent moisture inside these constructions. Ultimately, this should be taken into account when constructing packages with embedded components that cannot be considered to be hermetic. Our samples were exposed to S5 % moisture, while the moisture has been shown only in potential leaks among individual layers of pre-pregs sandwich, but also due to the saturation of the material itself, which is particularly activated along with the interface of samples. The results of the experiments can be used in creating multi-layer embedded sandwich structures, especially in terms of their reliability.","PeriodicalId":374245,"journal":{"name":"2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115575485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Diagnostics of construction parts of the dry transformers 干式变压器结构部件的诊断

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905159

M. Gutten, M. Kučera, D. Korenčiak, Martin Karman

引用次数: 1

Method for evaluation of impregnant compatibility with lead-wire insulation 铅丝绝缘浸渍兼容性的评定方法

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905128

Filová Zuzana, Kozáková Alena, Kocúrová Katarína, Ďuračka Miroslav, Dérer Tomáš, Šištík Michal

{"title":"Method for evaluation of impregnant compatibility with lead-wire insulation","authors":"Filová Zuzana, Kozáková Alena, Kocúrová Katarína, Ďuračka Miroslav, Dérer Tomáš, Šištík Michal","doi":"10.1109/Diagnostika55131.2022.9905128","DOIUrl":"https://doi.org/10.1109/Diagnostika55131.2022.9905128","url":null,"abstract":"The most important component from the point of view of the life of each electrical equipment is its insulation system. The basic insulation of the electrical system is primary and secondary insulation. Primary insulation is the first insulation layer applied directly to the electric winding wire. Solvent varnishes are insulating materials of primary insulation and their role is in particular to provide electrical strength of the wire. Secondary insulation, often called as secondary impregnation, is the winding insulation process that follows primary insulation. It is a chemical process where the mechanical stability of the electrical windings increases by applying impregnants and insulated wires are protected against mechanical damage, moisture and other environmental influences. The role of impregnants in the winding of electrical machines is mainly the reinforcement of winding and heat removal. The influence of impregnant on the electrical insulating properties contributes significantly to the life of the insulation system with impregnant: compatibility with wire enamel, compatibility with other materials of insulation system according to construction and type of motor or transformer. The problem may also be the insufficient compatibility of the impregnant with the wire insulation. Therefore composition and processing of wire insulation has a significant impact on quality of impregnation.","PeriodicalId":374245,"journal":{"name":"2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"128 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124241961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potential and limitation of dielectric response analysis for mechanically aged VPI insulation 机械老化VPI绝缘介质响应分析的潜力和局限性

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905142

C. Staubach, Sören Meissner

引用次数: 0

Simulation of Broken Rotor Bar Fault by Asymmetric Induction Motor Model 基于非对称感应电机模型的转子断条故障仿真

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905121

N. Djagarov, G. Enchev, J. Djagarova

{"title":"Simulation of Broken Rotor Bar Fault by Asymmetric Induction Motor Model","authors":"N. Djagarov, G. Enchev, J. Djagarova","doi":"10.1109/Diagnostika55131.2022.9905121","DOIUrl":"https://doi.org/10.1109/Diagnostika55131.2022.9905121","url":null,"abstract":"There is a need for diagnostics of the ship’s electrical equipment, which improves its operation and maintenance. The ship’s working conditions are very specific: metal hull, diesel power plant, powerful electric propulsion, the presence of various sources of disturbances. Development and implementation of ship systems for centralized control and diagnostics of perfect electrical equipment Ask in these systems for modeling of the induction machine, including damage to the rotor and the sideband, with minimal computational complexity. In known publications, mathematical models of induction motors are usually used, there is one specific damage. In our previous publications, a universal asymmetric mathematical model of an induction motor was proposed, allowing simulations of production emergency modes caused by damage in stator and rotor windings and in the mechanical part of the motor. In the article with the help of this universal model a broken rotor bar fault is simulated. An asymmetrically necessary mathematical model of the induction motor and a way to simulate this type of failure are shown. The obtained experimental results are introduced and analyzed with the help of the model.","PeriodicalId":374245,"journal":{"name":"2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122550946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Cost-efficient real-time condition monitoring and fault diagnostics system for BLDC motor using IoT and Machine learning 采用物联网和机器学习的无刷直流电机经济高效的实时状态监测和故障诊断系统

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905102

H. Raja, H. Raval, T. Vaimann, A. Kallaste, A. Rassõlkin, A. Belahcen

引用次数: 3

Diagnostika 2022 Cover Page 诊断卡2022封面页

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/diagnostika55131.2022.9905161

引用次数: 0

Investigation of Natural Ester Insulating Fluid Properties and Thermal Model of a Transformer in Wide Temperature Range 天然酯类绝缘流体特性及变压器宽温度范围热模型研究

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905122

Jan Leffler, Lukáš Sobotka, Zdislava Mokrá, R. Pechánek, P. Trnka

引用次数: 0

Comparison of time and frequency method in fault detection for transformer windings 变压器绕组故障检测时频法的比较

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905080

D. Korenčiak, M. Gutten, Martin Karman

引用次数: 0