2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)最新文献_第2页

Influence of Current Pulses on Resistance of Conductive Adhesive Joints 电流脉冲对导电粘合接头电阻的影响

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905172

P. Mach, M. Svoboda

{"title":"Influence of Current Pulses on Resistance of Conductive Adhesive Joints","authors":"P. Mach, M. Svoboda","doi":"10.1109/Diagnostika55131.2022.9905172","DOIUrl":"https://doi.org/10.1109/Diagnostika55131.2022.9905172","url":null,"abstract":"Conductive adhesive joints were created from two types of electrically conductive adhesives with isotropic electrical conductivity by the adhesive mounting of resistors with “zero” resistance on the test board with copper pads. Both adhesives were from the same manufacturer, one was one-component and the other two-component. Joints were loaded first climatically, and then by current pulses. Climatic loading was carried out for one group of joints at normal temperature and 99 % relative humidity, for the other group of joints in an environment with a temperature of 85 °C and relative humidity of 85 %. The exposure time was always 300 hours. Then the joints were loaded with current pulses with a frequency of 50 Hz for 20, 50, and 100 minutes. The amplitudes of the current pulses were 5, 15, and 40 A, respectively. The semi-wide pulse was 2 μ.s The resistance of joins was measured in the four-point arrangement. Climatic loading of joints made of two-component glue caused, in the case of both types of loading, only small changes in the resistance of the joints. With one-component adhesive, the changes were greater. The same applies to current pulse loading. It was found, regardless of the type of adhesive, that for joints climatic aged in an environment with normal temperature and high RH, the application of current pulses provokes a decrease in the resistance of the joints. This can be justified by the heat loss that is generated in the joint due to the application of current pulses. This heat causes additional hardening of the adhesive, reducing its volume and improving the contact between the filler particles.","PeriodicalId":374245,"journal":{"name":"2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"16 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":"133751630","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

The dielectric spectroscopy of new generation of transformer oil Shell 新一代变压器油外壳的介电光谱

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905104

Š. Hardoň, J. Kúdelčík, M. Gutten

{"title":"The dielectric spectroscopy of new generation of transformer oil Shell","authors":"Š. Hardoň, J. Kúdelčík, M. Gutten","doi":"10.1109/Diagnostika55131.2022.9905104","DOIUrl":"https://doi.org/10.1109/Diagnostika55131.2022.9905104","url":null,"abstract":"In this paper, are described experimental results of structural changes of investigated ferrofluids based on insulating oil produced by a gas-to-liquid process and containing ferrimagnetite nanoparticles. Compared to normal mineral oils on the paraffinic and naphthenic base, oils derived from GTL technology are purer and have a higher lightning impulse breakdown voltage. As a carrier liquid, transformer oil (Shell Diala S4 ZX-I) with a concentration of 0.98 % ferrimagnetite nanoparticles contains investigated ferrofluid. In this experiment, dielectric spectroscopy methods were applied to obtain experimental data to investigate structural changes in Shell transformer oil as a result of an external magnetic field applied to ferrofluid. The dielectric measurements were carried out at perpendicular and parallel orientation of the electric and magnetic fields, too, and in the frequency range from 1 mHz to 10 kHz. The magneto-dielectric effect of the dielectric losses was studied, too. The changes of dielectric parameters were measured also at the linear change of the magnetic field to values up to 200 mT and anisotropy measurement.","PeriodicalId":374245,"journal":{"name":"2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"1 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":"130369805","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

Characteristics and Advantages of a State-Space Orientated Calculation in Regenerative Energy Systems 面向状态空间的可再生能源系统计算的特点与优点

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905094

T. Blenk, C. Weindl

引用次数: 1

Influence of Corrosive Gases on Reliability of Conductive Joints 腐蚀性气体对导电接头可靠性的影响

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905177

M. Hirman, Marek Riha, J. Navrátil, F. Steiner

引用次数: 0

Investigation of Effects of Thermal Ageing on Dielectric Properties of Low Voltage Cable Samples by using Dielectric Response Analyzer 用介电响应分析仪研究热老化对低压电缆样品介电性能的影响

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905157

S. Bal, Z. A. Tamus

引用次数: 4

Educational methods for Industry 4.0 工业4.0的教育方法

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905099

Tomas Rericha, J. Navrátil, F. Steiner, J. Tupa

{"title":"Educational methods for Industry 4.0","authors":"Tomas Rericha, J. Navrátil, F. Steiner, J. Tupa","doi":"10.1109/Diagnostika55131.2022.9905099","DOIUrl":"https://doi.org/10.1109/Diagnostika55131.2022.9905099","url":null,"abstract":"Industry worldwide is facing new challenges, particularly the implementation of new technologies, climate change and currently the pandemic of the disease caused by the new coronavirus COVID-19. For the industry to be competitive, it must make technological changes. These changes are based on the concept of Industry 4.0. The changes brought about by implementing the Industry 4.0 concept and the related digitization of the economy have implications for the functioning of markets, industries, and other sectors. Significant impacts can be expected on the labor market when the demand for specific professions changes and new competencies will be required for employees. The fundamental question is how specifically these requirements can be implemented in current education conditions, specifically in the university environment. As part of practical training, it is unrealistic to demonstrate new ways of operation management on an extensive product line. It is very effective to use various forms of small-scale models. These models behave practically the same as in actual operation, and students can try out different production states, problem-solving and subsequent optimization. This article describes how we solve this problem in our university.","PeriodicalId":374245,"journal":{"name":"2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"80 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":"125994448","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

Impact of new IoT technologies for diagnostics and maintenance purposes in buildings 新物联网技术对建筑物诊断和维护目的的影响

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905138

Stefan Veit, F. Steiner

引用次数: 0

Fault Diagnosis System of Cartesian Robot for Various Belt Tension 直角坐标机器人各种皮带张力故障诊断系统

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905111

S. Autsou, T. Vaimann, A. Rassõlkin, K. Kudelina

引用次数: 0

Review on Space Charge Induced Aging and Voltage Endurance Tests of Polymeric Insulating Materials Under High DC Voltage 高直流电压下高分子绝缘材料空间电荷诱导老化及耐压试验研究进展

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905143

Henry Hirte, S. Kornhuber, S. Braun, P. Werle

引用次数: 1

Localization of PD-events in HV-Windings of Rotating Machines 旋转电机高压绕组中pd事件的定位

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2022-09-06 DOI: 10.1109/Diagnostika55131.2022.9905130

F. Oettl, C. Engelen, C. Staubach

{"title":"Localization of PD-events in HV-Windings of Rotating Machines","authors":"F. Oettl, C. Engelen, C. Staubach","doi":"10.1109/Diagnostika55131.2022.9905130","DOIUrl":"https://doi.org/10.1109/Diagnostika55131.2022.9905130","url":null,"abstract":"Rotating electrical machines are a vital component in the power generation as well as in the industrial production. Unexpected failures in such assets can lead to high follow up costs, caused by the machine itself and the resulting down times. A reliable PD diagnosis is a powerful tool to find potential weak spots in the winding insulation system and to prevent such unexpected outages. As an interpretation and risk assessment tool, the phase resolved pattern (PRPD) is well established and accepted. The shape of the PD pattern allows to identify the type of the fault. However, so far, no system is available, which can correlate the fault directly with the location within the winding. This paper presents the key results of comprehensive investigations and the development of an algorithm which targets the partial discharge localization in spatial distributed rotating machine windings. Limitations and accuracy of the developed tool are discussed using different rotating machine windings. Artificial and real partial discharge events which have been provoked at various positions along the insulation system could be localized reliably within certain limits. With the presented method a correlation is obtained between the phase resolved pattern and the position of the PD source along the winding. The knowledge of the position along coil allows the test engineer to judge if the localized PD source is active in normal operation, without dismantling the machine. The localization approach is based on the measurement of the electrical impulses. Therefore, possible PD sources can be localized even though they might not be detectable during a visual inspection, enabling a selective repair.","PeriodicalId":374245,"journal":{"name":"2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"2 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":"129175135","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