Results 61 to 70 of about 4,341 (292)

Study on Cumulative Effects of Mechanical Forces and Deformation in Power Transformer Windings

Energies
Winding damage is one of the most common and highly destructive faults in power transformers. To analyze the winding force and deformation under short-circuit conditions, this paper establishes a three-dimensional simulation model of a 220 kV oil ...
Chunyan Zang, Peng Li, Ruijuan Tan, Yishuo Li, Shengbo Xu, Feng Jiang   +5 more
doaj   +1 more source

Investigation of transformer failure in Indonesia

MATEC Web of Conferences, 2018
Transformer failure investigation is important to obtain necessary actions which prevent similar failure from happening in the future. An investigation was conducted upon the failure of a transformer in Indonesia which damaged substation apparatuses ...
Harsono Brian Bramantyo S.D.A., Kusuma Aristo Adi, Munir Buyung Sofiarto, Priambodo Nur Widi   +3 more
doaj   +1 more source

Identification of Power Transformer Winding Mechanical Fault Types Based on Online IFRA by Support Vector Machine

Energies, 2017
A transformer is the most valuable and expensive property for power utility, thus ensuring its reliable operation is a major task for both operators and researchers.
Zhongyong Zhao, Chao Tang, Qu Zhou, Lingna Xu, Yingang Gui, Chenguo Yao   +5 more
doaj   +1 more source

Analysis of transient action influence in power transformer [PDF]

, 2011
This article is focused on the theory of unacceptable effect on transformer winding, mainly the overvoltages and the mechanical forces. In the next part of the article is described the measurement of selfdischarging voltage frequency dependence on ...
Gutten, Miroslav, Jurcik, Jozef, Korenčiak, Daniel   +2 more
core  

Optimizing Post Friction Stir Welding Heat Treatment in Dissimilar Friction Stir Welded 6061/AlSi10MgMn Joints for Electrical Vehicle Battery Housing

Advanced Engineering Materials, EarlyView.
Microstructural evolution and hardness optimization along the cross‐section of friction stir welded AA6061/AlSi10MgMn joints, for electric vehicle battery housings, were investigated. Postweld aging between 170°C and 220°C enhances hardness uniformity within the nugget zone.
Emanuele Ghio, Emanuela Cerri
wiley   +1 more source

Diagnostics of Winding Deformation in a Single-Phase Power Transformer with an Unloaded Tertiary Winding in Operational Mode

Acta Technologica Agriculturae, 2018
The presented paper is focused on the development of an algorithm and software implementation of this algorithm into diagnostics of winding deformation in a single-phase power transformer with an unloaded tertiary winding in operational mode.
Dorozhko Sergey, Krivunev Andrey
doaj   +1 more source

Англійська мова для студентів електромеханічних спеціальностей [PDF]

, 2013
Навчальний посібник розрахований на студентів напряму підготовки 6.050702 Електромеханіка. Містить уроки, що структуровані за тематичними розділами, граматичний коментар, короткі англо-український і українсько- англійський ...
Азюковський, Олександр Олександрович, Балахонцев, Олександр Васильович, Бешта, Олександр Степанович, Введенська, Тетяна Юріївна, Долгов, Олександр Михайлович, Сьомін, Андрій Олександрович, Хілов, Віктор Сергійович, Іванов, Олексій Борисович   +7 more
core  

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source

On the Feasibility of Localizing Transformer Winding Deformations Using Optical Sensing and Machine Learning

Photonics
Mechanical vibrations induced by electromagnetic forces during transformer operation can lead to winding deformation or failure, an issue responsible for over 12% of all transformer faults.
Najmeh Seifaddini, Meysam Beheshti Asl, Sekongo Bekibenan, Simplice Akre, Issouf Fofana, Mohand Ouhrouche, Abdellah Chehri   +6 more
doaj   +1 more source

A New Multi-Conductor Transmission Line Model of Transformer Winding for Frequency Response Analysis Considering the Frequency-Dependent Property of the Lamination Core

Energies, 2018
Multi-conductor transmission line (MTL) model of power transformer winding for frequency response analysis (FRA) has been successfully applied for the purpose of studying the characteristics of winding deformations. Most of the time it is considered that,
Song Wang, Ze Guo, Ting Zhu, Hanke Feng, Shuhong Wang   +4 more
doaj   +1 more source