scholarly journals STUDYING ELECTRICAL MEASUREMENT METHODS ON LABORATORY BENCH

2020 ◽  
Vol 2020 (1) ◽  
pp. 121-122
Author(s):  
Irina Il'ina ◽  
Stepan Sadovskiy
Keyword(s):  
Electrical Measurement ◽  
Measurement Methods ◽  
Laboratory Work ◽  
Electrical Measurements ◽  
Laboratory Bench

Studying laboratory bench and developing laboratory work on electrical measurements and basics of metrology.

scholarly journals Electromechanical Response of Smart Ultra-High Performance Concrete under External Loads Corresponding to Different Electrical Measurements

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1281
Author(s):  
Min Kyoung Kim ◽  
Huy Viet Le ◽  
Dong Joo Kim
Keyword(s):  
Electrical Resistivity ◽  
High Performance ◽  
High Performance Concrete ◽  
Steel Slag ◽  
Measurement Methods ◽  
Electrical Measurements ◽  
Ultra High Performance Concrete ◽  
Ac Measurement ◽  
External Loads ◽  
Functional Fillers

This study investigated the electromechanical response of smart ultra-high-performance concretes (smart UHPCs), containing fine steel slag aggregates (FSSAs) and steel fibers as functional fillers, under external loads corresponding to different measurement methods. Regardless of different measurement methods of electrical resistance, the smart UHPCs under compression showed a clear reduction in their electrical resistivity. However, under tension, their electrical resistivity measured from direct current (DC) measurement decreased, whereas that from alternating current (AC) measurement increased. This was because the electrical resistivity, from DC measurement, of smart UHPCs was primarily dependent on fiber crack bridging, whereas that from AC measurement was dependent on tunneling effects.

scholarly journals Inspeksi Overhaul Motor Induksi 3 Fasa 1000 KW di PT. Mesindo Tekninesia

2020 ◽  
Vol 21 (2) ◽  
pp. 100
Author(s):  
Akmal Radiansyah ◽  
Albert Gifson
Keyword(s):  
Electrical Measurement ◽  
Mechanical Action ◽  
Load Test ◽  
Electric Motors ◽  
Mechanical Measurement ◽  
Electrical Measurements ◽  
Maintenance And Repair ◽  
Maintenance Activity ◽  
Polarization Index ◽  
Standard Value

An electric motor that is used continuously will experience a decline in performance and even be damaged, maintenance and repair of electric motors must be done based on standards so that all existing specifications can be met and repairs deserve to be accepted. Where in this case motor repair is done by overhauling, where overhaul is a comprehensive repair or maintenance activity by repairing or replacing parts of electric motors that are damaged. Based on visual data and electrical measurements the decrease in the value of the polarization index (PI) of the induction motor is caused by dirty and moist winding conditions. Overhaul is done in 8 stages, namely; planning, dismantling, electrical measurement, mechanical measurement, electrical action, mechanical action, assembling and no load test running. After overhauling, the result shows that the value of the polarization index (PI) increased by 1.4 from 1.8 to 3.2, which is above the standard value set by IEEE 43.ABSTRAK:Suatu motor listrik yang digunakan terus menerus akan mengalami penurunan performa bahkan rusak, perawatan dan perbaikan motor listrik harus dilakukan berdasarkan standar supaya semua spesifikasi yang ada dapat terpenuhi dan perbaikan layak untuk diterima. Dimana pada kasus ini perbaikan motor diakukan dengan cara overhaul, dimana overhaul merupakan kegiatan perbaikan atau perawatan secara menyeluruh dengan cara memperbaiki atau mengganti bagian dari motor listrik yang mengalami kerusakan. Berdasarkan data visual dan pengukuran elektrik penurunan nilai polarization index (PI) motor induksi disebabkan oleh kondisi winding yang kotor dan lembab. Overhaul dilakukan dengan 8 tahapan, yaitu; planning, dismantling, pengukuran elektrik, pengukuran mekanik, tindakan elektrik, tindakan mekanik, assembling dan running test no load. Setelah overhaul didapatkan hasil bahwa nilai polarization index (PI) meningkat sebesar 1.4 dari sebelumnya 1.8 menjadi 3.2, berada diatas nilai standar yang ditetapkan oleh IEEE 43

Measurement of Valence Band Offset in Strained GexSi1−x/Si Heterojunctions

1991 ◽  
Vol 220 ◽  
Author(s):  
S. Khorram ◽  
C. H. Chern ◽  
K. L. Wang
Keyword(s):  
Valence Band ◽  
Theoretical Calculations ◽  
Thick Layer ◽  
Electrical Measurement ◽  
Band Offset ◽  
Electrical Measurements ◽  
Temperature Growth ◽  
Heterostruc Ture ◽  
Valence Band Discontinuity ◽  
Good Agreement

ABSTRACTThe valence band discontinuity ΔEV in the coherently strained GexSi1−x/Si heterostruc-ture is determined using I-V-T measurement. The electrical measurements of the band discontinuity of the pseudomorphic layers are difficult due to the thin layer imposed by the strain. Recently, low temperature growth of thick layer (>100 nm) of coherently strained GexSi1−x on Si has been achieved and thus made it possible for an accurate electrical measurement of band offset. The results obtained are in good agreement with the theoretical calculations by pseudopotential method.

scholarly journals Pengembangan Bahan Ajar Mata Pelajaran Dasar dan Pengukuran Listrik untuk Sekolah Menengah Kejuruan

2016 ◽  
Vol 23 (1) ◽  
pp. 28 ◽  
Author(s):  
Aliangga Kusumam ◽  
Mukhidin Mukhidin ◽  
Bachtiar Hasan
Keyword(s):  
Research And Development ◽  
Core Competencies ◽  
Sampling Technique ◽  
Electrical Measurement ◽  
Measuring Instruments ◽  
Electrical Measurements ◽  
Teaching Materials ◽  
Purposive Sampling ◽  
System Of Units ◽  
Preliminary Study

This study is aimed to develop teaching materials of basic electrical and electrical measurement, and to find out the feasibility of the teaching materials that have been developed in SMK Negeri 1 Koba Bangka. This study used the method of Research and Development (R & D) that begins with the preliminary study followed by the development phase and the product assessment. The subjects that consisted of three experts and 28 students of the Department of Electrical Installation Engineering were determined using purposive sampling technique. The data collection technique used documentation, interviews and questionnaires. The procedure of this study is the process of preparing the teaching materials through the following stages: (a) A preliminary study, by conducting interviews with the head of the program and the teachers. The analysis of the syllabus and core competencies. (b) Collecting learning resources and literature as well as the main points of the materials. (c) Preparing the draft of the materials. (d) The limited trial of the products (e) The extensive product testing. (f) The data analysis and evaluation. The results were the development of the teaching materials was based on the curriculum of 2013 and the syllabus of basic electrical and electrical measurement. The teaching materials were developed starting from the materials of electric current and electron current, electrical materials, passive elements, active elements, direct current resistive circuits, two poles theorem, power and efforts, switching circuits, the system of units of measurement, measuring instruments and electrical measurements, and the types of measuring devices.Penelitian ini bertujuan untuk mengembangkan bahan ajar dasar dan pengukuran listrik, dan mengetahui kelayakan bahan ajar yang telah dikembangkan menurut expert judgment dan peserta didik di SMKN I Koba Bangka. Metode penelitian ini menggunakan Research and Development (R & D) yang diawali dengan studi pendahuluan dilanjutkan tahap pengembangan dan penilaian produk. Subjek penelitian ditentukan dengan menggunakan teknik purposive sampling yang terdiri dari tiga orang expert judgement dan 28 orang peserta didik teknik instalasi pemanfaatan tenaga listrik. Pengumpulan data dengan teknik studi dokumentasi, wawancara dan kuesioner berupa angket. Prosedur penelitian ini adalah proses penyusunan bahan ajar dasar dan pengukuran listrik melalui tahap-tahap sebagai berikut: (a) Studi pendahuluan, dengan melakukan wawancara terhadap ketua program dan guru. Studi analisis silabus dan menganalisa kompetensi dasar dalam penyusunan bahan ajar (b) Mengumpulkan sumber belajar dan literatur serta pokok-pokok materi yang akan disusun. (c) Penyusunan draft bahan ajar dasar dan pengukuran listrik. (d) Uji coba terbatas produk. (e) Uji coba lebih luas produk. (f) Pengolahan data dan evaluasi. Kesimpulan penelitian ini adalah pengembangan bahan ajar mata pelajaran dasar dan pengukuran listrik yaitu bahan dikembangkan dari kurikulum 2013 dan silabus mata pelajaran dasar dan pengukuran listrik. Materi bahan ajar dikembangkan mulai dari materi arus listrik dan arus elektron, bahanbahan listrik, elemen pasif, elemen aktif, rangkaian resistif arus searah, teorema dua kutub, daya dan usaha, peralihan rangkaian, sistem satuan pengukuran, alat ukur dan pengukuran listrik, dan jenis alat ukur.

A Study of Measurement Methods for Detecting Voiding and Delamination of Die Attach Materials in Power Semiconductor Devices

1996 ◽  
Author(s):  
L. Smith ◽  
T.S. Kalkur
Keyword(s):  
Semiconductor Industry ◽  
Semiconductor Devices ◽  
Electrical Measurement ◽  
Acoustic Microscopy ◽  
Temperature Sensitive ◽  
Analysis Tool ◽  
Electrical Measurements ◽  
X Ray ◽  
Power Semiconductor ◽  
Die Attach

Abstract There are three basic methods used to detect voiding and delamination of die attach materials in semiconductor devices. (1)Electrical measurement of a temperature sensitive parameter (e.g. Vbe, Vgs) under pulsed power conditions is preferred by manufacturers because the data is easily and quickly obtainable during final electrical test; but electrical measurements are only sensitive to gross voiding or delamination. (2)X-ray analysis produces images which are generally accepted as proof of voiding; but X-ray is completely insensitive to delamination or degradation from thermal stress. (3)Use of Scanning Acoustic Microscopy (SAM) as a non-intrusive analysis tool is increasing in the semiconductor industry and provides accurate evidence of delamination in cases where the other two methods fail. The use of all three methods is recommended to maintain a reliable power product fabrication line at its peak of quality with respect to die attach coverage. This paper will compare and contrast the three methods during thermal shock stress in two manufacturer's power Insulated Gate Bipolar Transistor (IGBT) using a lead-tin solder die attach material.

Electrical Measurement Methods for Spin-Orbit Torque in Nonmagnet/Ferromagnet Bilayers

2019 ◽  
Vol 29 (3) ◽  
pp. 108-122
Author(s):  
Soogil Lee ◽  
Jeongchun Ryu ◽  
Jong-Guk Choi ◽  
Jeong-Mok Kim ◽  
Jae Wook Lee ◽  
...  
Keyword(s):  
Electrical Measurement ◽  
Measurement Methods ◽  
Spin Orbit

scholarly journals Research aimed at expanding the range of permissible application modes of aircraft equipment

2016 ◽  
pp. 24-29
Author(s):  
A. A. Zamyshlyaev ◽  
A. N. Shmygin ◽  
D. E. Donovskiy
Keyword(s):  
Static Pressure ◽  
Computer Programs ◽  
Air Pressure ◽  
Laboratory Work ◽  
Bench Test ◽  
Flight Tests ◽  
Laboratory Bench ◽  
Application Mode

The article shows a cycle of design-theoretical and laboratory work, which provided opportunities to significantly expand the application mode of aviation equipment without additional flight tests. The work was carried out in four stages: determination of impact air pressure and static pressure receiving coefficients, development of computer programs, laboratory bench-test at the air pressure receiving system (APRS) and APRS parameters computational determination in the whole range of application modes.

Vergleich optischer und elektrischer Messungen an Cu-, Ag- und Au-Schichten mit unterschiedlicher Fehlstellenkonzentration / Comparison of Optical and Electrical Measurement on Cu, Ag and Au Films with Different Lattice Defect Concentrations

1974 ◽  
Vol 29 (8) ◽  
pp. 1159-1163
Author(s):  
H. Bispinck
Keyword(s):  
Hall Effect ◽  
Electron Density ◽  
Optical Constants ◽  
Lattice Defect ◽  
Electrical Measurement ◽  
Electrical Measurements ◽  
Conduction Electrons

The optical constants, d. c. conductivity and Hall-effect were measured in UHV for evaporated films of Cu, Ag and Au (thickness approx. 100 nm) which were quenched, condensed and stepwise annealed. For the range of wevelengths chosen (0.9 - 2.4 μm), a density of conduction electrons and their damping frequency can be determined from the optical constants by using the Drude theory. If one compares these data with the corresponding electrical measurements, a very similar behavior is shown for the recovery. The electron density increases by a factor 1.3 - 1.6, whereas the damping frequency decreases by a factor 1.7 - 2.8.

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