2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE)最新文献

The Initial Temperature Rise in a Permanent Magnet Synchronous Generator as a Tool in the Detection of Stator Inter-Turn Short-Circuits 用永磁同步发电机的初始温升检测定子匝间短路

2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2020-11-05 DOI: 10.1109/ISFEE51261.2020.9756141

M. Barrett

{"title":"The Initial Temperature Rise in a Permanent Magnet Synchronous Generator as a Tool in the Detection of Stator Inter-Turn Short-Circuits","authors":"M. Barrett","doi":"10.1109/ISFEE51261.2020.9756141","DOIUrl":"https://doi.org/10.1109/ISFEE51261.2020.9756141","url":null,"abstract":"The permanent magnet synchronous generator (PMSG) has many of the characteristics required for wind and tidal-stream generators. It is however, prone to stator winding inter-turn short-circuits, which can progress to catastrophic failure. This paper explores the possibility of detecting inter-turn short-circuits by analysis of the generator’s temperature rise under stator open-circuit conditions. The platform for detecting and flagging temperature rise is the programmable controller (PLC). The effects of, and the detection of inter-turn short-circuits from the literature are examined. A series of experiments to capture generator temperature at 5-minute intervals at different output frequencies and at different starting temperatures is carried out. From those experimental results it was evident that there was detectable temperature difference between a normal and a faulted stator winding in the first 5 minutes of operation. A methodology to detect, and within the 5-minute time scale, flag this abnormal temperature rise is proposed. The novelty of this approach is that it focusses on the rate of change of the PMSG temperature rise rather than absolute values. This is relevant as PMSG initial temperatures can vary due to operational and environmental factors. The methodology proposed was found to be robust. Further work will explore temperature rise under generator load conditions.","PeriodicalId":145923,"journal":{"name":"2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"25 1-4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127463638","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

Calibration of a Frequency Reference for the Communications Standard 802.11g 通讯标准802.11g频率基准的校正

2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2020-11-05 DOI: 10.1109/ISFEE51261.2020.9756137

Iulian Ursac, F. Constantinescu

引用次数: 0

Multimodal Optimization Using GA in Specific Electromagnetic Field Problems 基于遗传算法的特定电磁场问题多模态优化

2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2020-11-05 DOI: 10.1109/ISFEE51261.2020.9756182

L. Ferariu, C. Petrescu

引用次数: 0

Active Flux Based Predictive Control of Interior Permanent Magnet Synchronous Machine 基于主动磁通的内置式永磁同步电机预测控制

2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2020-11-05 DOI: 10.1109/ISFEE51261.2020.9756135

M. Costin, C. Lazar

引用次数: 0

Enhancing the Conductive Properties of the Textile Surfaces for Electrodes or EM Shields Development by Low-Pressure RF Plasma O2 利用低压射频等离子体O2增强纺织品表面电极或电磁屏蔽材料的导电性能

2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2020-11-05 DOI: 10.1109/ISFEE51261.2020.9756169

R. Aileni, L. Chiriac

{"title":"Enhancing the Conductive Properties of the Textile Surfaces for Electrodes or EM Shields Development by Low-Pressure RF Plasma O2","authors":"R. Aileni, L. Chiriac","doi":"10.1109/ISFEE51261.2020.9756169","DOIUrl":"https://doi.org/10.1109/ISFEE51261.2020.9756169","url":null,"abstract":"This paper presents the methods for enhancing the textile surfaces' conductive properties for flexible electrodes development. Our experiments used 100% raw cotton fabric that presents a pronounced hydrophobic character, followed by treatments in low-pressure RF plasma O2 using a power generator RF1 13.56 MHz and a power generator RF2 40 kHz to achieve a hydrophilic effect of the textile surface. The hydrophilic textile surfaces obtained were treated using scraping method with a conductive paste based polymeric matrix (polyvinyl alcohol (PVA)) and nickel microparticle (size dimension < 150 μm), followed by free drying for 14-18 hours, respective crosslinking. After free drying at room temperature and crosslinking of the conductive paste, the materials' surface resistance was investigated using the Warmbier METRISO B530 Surface Resistance Tester and concentric ring probe 880, and the results indicated a low surface resistance (4.77 -3.85x102 Ω). In addition, the investigations of hydrophilic/hydrophobic character of the textile surfaces using the VCA Optima device and 4μl distilled water drop indicated that the textile surfaces treated in plasma and coated with conductive paste based Ni present a hydrophilic character.The technology used for transforming a hydrophobic material into hydrophilic material in just 3 minutes, RF plasma O2, is a clean technology with zero waste and a low carbon footprint.","PeriodicalId":145923,"journal":{"name":"2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130247269","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

Hysteresis Cycle Measurements Using an Innovative Laboratory Equipment 用创新的实验室设备测量迟滞周期

2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2020-11-05 DOI: 10.1109/ISFEE51261.2020.9756138

M. Marin, Veronica Manescu (Paltanea), G. Păltânea, P. Andrei, C. Grumeza, I. Hantila

引用次数: 1

FEM–PWM Circuit Model of a Brushless DC Motor Using COMSOL 基于COMSOL的无刷直流电动机FEM-PWM电路模型

2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2020-11-05 DOI: 10.1109/ISFEE51261.2020.9756145

O. Craiu, T. Ichim

引用次数: 0

Design of Optimal PID Controller for Magnetic Levitation System Using Linear Quadratic Regulator Approach 用线性二次型调节器法设计磁悬浮系统最优PID控制器

2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2020-11-05 DOI: 10.1109/ISFEE51261.2020.9756190

L. Ismail, C. Petrescu, C. Lupu, Duc Lieh Luu

引用次数: 2

Aspects Regarding Testing of Electromagnetic Contactors Sensitivity to Voltage Dips 电磁接触器对电压跌落敏感性测试的几个方面

2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2020-11-05 DOI: 10.1109/ISFEE51261.2020.9756156

M. Calin, E. Helerea

引用次数: 1

Design Procedure of Small Power Transformers for Didactic Purposes 教学用小型电力变压器设计程序

2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2020-11-05 DOI: 10.1109/ISFEE51261.2020.9756187

Alexandra Georgiana Diana Celcan, Leonard Marius Melcescu, C. Gheorghe, T. Tudorache

{"title":"Design Procedure of Small Power Transformers for Didactic Purposes","authors":"Alexandra Georgiana Diana Celcan, Leonard Marius Melcescu, C. Gheorghe, T. Tudorache","doi":"10.1109/ISFEE51261.2020.9756187","DOIUrl":"https://doi.org/10.1109/ISFEE51261.2020.9756187","url":null,"abstract":"Experimental training of students enrolled in electrical engineering study programs is fundamental for their future career. Sometimes, due to specific reasons, the limited laboratory infrastructure does not allow a correct match between theoretical concepts that apply to large equipment and experimental devices existing in the laboratory that are typically small power ones. Such a situation may happen for example when studying the electric transformer. During the practical laboratory activities the students may notice a discrepancy between the theoretical concepts and the obtained experimental results because the small power transformers available in the laboratory have operation characteristics whose shapes are different with respect to those of the large power transformers. Thus, this paper proposes a design procedure for didactic purpose small power transformers, that allow the identification of solutions with predominant reactive component of the short-circuit voltage. An example of using this procedure is applied for a dry type small power single phase transformer, with a rated power of 1kVA.","PeriodicalId":145923,"journal":{"name":"2020 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116992757","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