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2020 ELEKTRO最新文献

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Effect of Air Gap Size on Parameters of High Speed Switched Reluctance Motor 气隙尺寸对高速开关磁阻电机参数的影响
Pub Date : 2020-05-01 DOI: 10.1109/ELEKTRO49696.2020.9130206
Š. Kočan, P. Rafajdus, M. Sumega
This paper deals with an analysis of the air gap size effect on the other parameters of high speed Switched Reluctance Motor (SRM) as average static torque, torque ripple, winding losses, iron losses, mechanical losses, output power and efficiency. At the beginning, there is introduction about state of the art of high-speed machines. The following section presents the state of the motor design before this analysis. Numerical and analytical models and design procedures are used. Subsequently, these procedures are presented. Finally, the obtained results are presented and commented.
本文分析了气隙大小对高速开关磁阻电动机平均静转矩、转矩脉动、绕组损耗、铁损耗、机械损耗、输出功率和效率等参数的影响。首先,介绍了高速机床的发展现状。下一节介绍了在此分析之前电机设计的状态。使用数值和分析模型以及设计程序。随后,介绍了这些程序。最后,给出了所得结果并进行了评述。
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引用次数: 2
Polymer lab-on-fiber probe based on Fabry-Perot resonator 基于法布里-珀罗谐振腔的聚合物光纤探针
Pub Date : 2020-05-01 DOI: 10.1109/ELEKTRO49696.2020.9130195
M. Goraus, I. Martincek, P. Urbancová, D. Pudiš, D. Kacik
In this paper, we present new concept of three-dimensional (3D) Fabry-Perot resonator (FPR) based on a novel IP-Dip polymer. For FPR structure fabrication a 3D laser lithography technique with non-linear two-photon polymerization (TPP) was used. Using single-step fabrication technique based on direct laser writing (DLW), we prepared 3D FPR structure, which was directly integrated at the end of a single mode optical fiber as an effective sensing element for lab-on-fiber (LOF) devices. The proposed FPR consists of IP-Dip structure with 35 μm air cavity. The parameters of FPR structure were numerically proposed and reflection spectrum was simulated by transfer matrix method (TMM). Reflection properties of FPR structure were measured using optical spectrum analyzer (OSA) in near-infrared region around wavelength of 1550 nm. The quality and morphological properties of fabricated FPR structure were analyzed by scanning electron microscope (SEM).
本文提出了基于新型IP-Dip聚合物的三维法布里-珀罗谐振器(FPR)的新概念。采用非线性双光子聚合(TPP)三维激光光刻技术制备FPR结构。采用基于直接激光写入(DLW)的单步制造技术,制备了三维FPR结构,该结构直接集成在单模光纤末端,作为光纤实验室(LOF)器件的有效传感元件。FPR由IP-Dip结构和35 μm空腔组成。对FPR结构参数进行了数值模拟,并用传递矩阵法(TMM)模拟了反射谱。利用光谱分析仪(OSA)测量了FPR结构在近红外波段1550 nm附近的反射特性。利用扫描电子显微镜(SEM)对制备的FPR结构的质量和形貌进行了分析。
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引用次数: 0
Analysing of insulating system oil-paper of power transformers by frequency dielectric spectroscopy 频率介电光谱法分析电力变压器绝缘系统油纸
Pub Date : 2020-05-01 DOI: 10.1109/ELEKTRO49696.2020.9130279
Peter Brnčal, M. Gutten, D. Korenčiak, M. Šebok, T. Kołtunowicz, P. Żukowski
Paper presents experimental diagnostics of insulating system oil-paper for power transformers, mainly by progressive frequency method – dielectric spectroscopy. The introduction of the article is described the base analysing for measurement insulating elements (oil and paper) of power transformers. The next part of article is described application of dielectric frequency domain spectroscopy (FDS) method for high-voltage power transformers. Diagnostic methods are used for measurement of insulating state of high-voltage devices with insulating parts as oil-paper. It was present that the values of these measuring results are highly impacted by the temperature of operating during the experimental diagnostics. Conductivity and moisture between dielectric transformer paper and insulating oil in an dielectric system are highly dependent from internal and ambient temperature. In the final section the article are presented experimental values of the diagnostic analysis for an operating oil traction transformer at different internal temperatures and conditions (with oil filling and without).
本文介绍了电力变压器绝缘系统油纸的实验诊断,主要采用进频法-介电谱法。本文介绍了电力变压器绝缘元件(油、纸)测量的基础分析。文章的下一部分描述了介质频域光谱(FDS)方法在高压电力变压器中的应用。以油纸为绝缘部件的高压装置绝缘状态的诊断方法。结果表明,在实验诊断过程中,这些测量结果的数值受操作温度的影响很大。在介电系统中,介电变压器纸和绝缘油之间的导电性和水分高度依赖于内部和环境温度。最后介绍了在不同内部温度和条件下(充油和不充油)运行的油牵引变压器诊断分析的实验值。
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引用次数: 0
Properties of detectors used in dp breakup experiment investigated at intermediate energies 研究了中能量dp分解实验中所用探测器的性能
Pub Date : 2020-05-01 DOI: 10.1109/ELEKTRO49696.2020.9130203
M. Janek, V. Ladygin, Semen Mikhailovich Piyadin
Detector efficiencies are investigated in dp breakup experiment at intermediate energies using collected data from methodical experiment and results obtained by phase space simulation in the ROOT and GEANT4 packages. Two configurations of detectors were used in order to investigate detector’s efficiency of particle registration. Perpendicular configuration is used to investigate detector efficiency as a function of a depth in E - scintillator. Longitudinal configuration is used to investigate possible variation of detector efficiency due to possible misalignment. Reasonable agreement between experimental and modeled results is obtained.
利用系统实验收集的数据和在ROOT和GEANT4封装中进行相空间模拟得到的结果,研究了中间能量下dp分解实验中探测器的效率。为了考察探测器的粒子配准效率,采用了两种结构的探测器。利用垂直构型研究了探测器效率随E闪烁体深度的变化规律。纵向配置用于研究由于可能的不对准而导致的探测器效率的可能变化。实验结果与模型结果吻合较好。
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引用次数: 2
ICT-competency Training for Foreign Language Teachers of Electrical Engineering Curricula 电子工程课程外语教师的ict能力培训
Pub Date : 2020-05-01 DOI: 10.1109/ELEKTRO49696.2020.9130310
N. Yesenina, I. V. Galitsyna
The present paper considers the professional activities modification of foreign language teachers at engineering universities within ICT-based environment, including the new demands for their competencies. The modular content and methodical aspects of a professional development course "ICT in FL training for electrical engineering students" is presented.
本文探讨了信息通信技术环境下工科大学外语教师专业活动的变化,包括对其能力的新要求。介绍了专业发展课程“电子工程专业学生的信息通信技术培训”的模块化内容和系统方面。
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引用次数: 1
Innovative Teaching Methods for Engineering Students 工科学生的创新教学方法
Pub Date : 2020-05-01 DOI: 10.1109/ELEKTRO49696.2020.9130347
N. Dubauskienė, A. Valinevicius, D. Andriukaitis, M. Zilys, D. Navikas, V. Markevičius, A. Merfeldas
Teaching engineering today is a challenging task due to many issues, mainly the dynamic nature of the subject, the scope of the learning material, and the information overload in lives of students. The expectations of a quality graduate is that not only that he or she will have good fundamental knowledge of the subject, but so called „soft" competencies and eagerness to develop the needed skills independently. Traditional lectures fall short of providing the desired outcome, especially in the environment of reducing study years and increasing the number of working, even full time, students. Some of these points can be successfully addressed by using innovative teaching methods, including Problem Based Learning and Case Study. These methods have been implemented in teaching a variety of subjects, and their proponents have a strong base for advocating even wider use, but even those who are convinced of their advantages are reluctant to turn their lectures in to problem solving or case analysis. This is due to a number of reasons, including institutional and environmental ones, but at least some of it is the obstacle of needing to write a problem or a case. Readymade cases and problems are not in abundance and must be tailored to each class anyway. In order to achieve the desired outcome these must be, in simpler terms, good stories, and even the best engineering teachers cannot always be expected to write well, especially in such a challenging subject. This paper aims to describe the process of creating an interesting, useful and motivating problem or case for use in engineering classes and providing the tools for teachers to include more problem solving or case analysis in their teaching process. This process is based on the experience of using Problem Based Learning and Case Study with second year materials engineering students for teaching basic electronics. The use of these learning methods were met with interest and enthusiasm from students, and the outcomes strongly depended on the quality of problems and cases used.
由于许多问题,今天的工程教学是一项具有挑战性的任务,主要是学科的动态性,学习材料的范围,以及学生生活中的信息过载。对一个高质量毕业生的期望是,他或她不仅要有良好的学科基础知识,而且要有所谓的“软”能力和渴望独立发展所需技能。传统的讲座不能提供预期的结果,特别是在学习年限减少、工作人数增加、甚至全职学生人数增加的环境下。其中一些问题可以通过使用创新的教学方法成功解决,包括基于问题的学习和案例研究。这些方法已经在许多学科的教学中得到了应用,它们的支持者有充分的理由提倡更广泛地使用它们,但即使是那些确信它们的优点的人也不愿意把它们的讲座转向解决问题或案例分析。这有很多原因,包括制度和环境的原因,但至少有一部分原因是需要编写问题或案例的障碍。现成的案例和问题并不多,无论如何都必须针对每个班级量身定制。为了达到预期的结果,简单地说,这些必须是好的故事,即使是最好的工程老师也不能总是被期望写得很好,尤其是在这样一个具有挑战性的主题上。本文旨在描述在工程课程中创建一个有趣的、有用的、有启发性的问题或案例的过程,并为教师在教学过程中提供更多解决问题或案例分析的工具。这个过程是基于在材料工程二年级学生的基础电子学教学中使用基于问题的学习和案例研究的经验。这些学习方法的使用引起了学生的兴趣和热情,其结果很大程度上取决于所使用的问题和案例的质量。
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引用次数: 0
Algorithm for Removal of Short Cycles in Tanner Graphs with Minimum-Hamming-Distance Check 用最小汉明距离检验去除坦纳图短循环的算法
Pub Date : 2020-05-01 DOI: 10.1109/ELEKTRO49696.2020.9130338
Viktor Durcek, M. Kuba, M. Dado
Two algorithms for removal of short cycles in Tanner graphs of parity-check matrices of binary LDPC codes constructed by Progressive Edge-Growth algorithm are described. These loop-removing algorithms can be used to improve error-correcting performance of existing LDPC codes and achieved results are provided.
描述了用渐进式边缘生长算法构造的二元LDPC码奇偶校验矩阵的Tanner图中短环的去除算法。这些去环算法可用于提高现有LDPC码的纠错性能,并给出了实现结果。
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引用次数: 0
Indirect induction hardening of thin electrically non-conductive layers 非导电薄层的间接感应硬化
Pub Date : 2020-05-01 DOI: 10.1109/ELEKTRO49696.2020.9130213
M. Dlouhý, V. Kotlan, I. Doležel
A model of indirect induction heating of very thin layers made of electrically non-conductive materials is presented. The model consists of two partial differential equations describing electromagnetic and temperature fields whose distributions are solved numerically. It is applicable for the design of devices intended for hardening of coatings (paints, lacquers or artificial resins) on metal surfaces, which is illustrated with an example, whose results are verified experimentally.
提出了一种非导电材料极薄层的间接感应加热模型。该模型由描述电磁场和温度场的两个偏微分方程组成,并对其分布进行了数值求解。它适用于设计用于金属表面涂层(油漆、漆或人造树脂)硬化的装置,并通过一个实例加以说明,其结果经实验验证。
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引用次数: 1
Digital Multispectral Images Superimposition Based on Preliminary Calibration or Contour Analysis: Advantages and Disadvantages 基于初步定标或轮廓分析的数字多光谱图像叠加:优缺点
Pub Date : 2020-05-01 DOI: 10.1109/ELEKTRO49696.2020.9130339
A. I. Efimov, I. Kudinov, O. Melnik, M. Nikiforov, I. S. Kholopov
The article considers two approaches to solving the problem of multispectral images superimposition in vision systems: based on the search for key points correspondences and preliminary photogrammetric calibration using a universal test object. Shows two variants of the test object design. The advantages and disadvantages of superimposition of the visible and infrared images by two strategies are analyzed.
本文考虑了两种解决视觉系统中多光谱图像叠加问题的方法:基于关键点对应的搜索和使用通用测试对象的初步摄影测量校准。显示测试对象设计的两个变体。分析了两种方法叠加可见光和红外图像的优缺点。
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引用次数: 2
UPS as an Active Part of Smart Grid UPS作为智能电网的积极组成部分
Pub Date : 2020-05-01 DOI: 10.1109/elektro49696.2020.9130295
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引用次数: 0
期刊
2020 ELEKTRO
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