Results 121 to 130 of about 4,341 (292)

Transformer winding deformation diagnosis method based on dynamic time warping and multilayer perceptron

Frontiers in Energy Research
To address the issues of strong subjectivity and difficulty in feature extraction that are inherent to traditional frequency response analysis methods used for diagnosing transformer winding deformation, an intelligent diagnostic method is proposed based
Guobin Wang, Kang Wang, Xiaolin Xu, Guangyu Shi, Yu Lu, Shengwen Shu   +5 more
doaj   +1 more source

A permeance-based transformer model and its application to winding interturn arcing fault studies [PDF]

, 2014
This paper investigates the behavior of power transformers under the occurrence of permanent or intermittent winding insulation ...
Cardoso, A. J. Marques, Oliveira, L. M. R.   +1 more
core  

Defect Analysis of the β– to γ–Ga2O3 Phase Transition

Advanced Functional Materials, EarlyView.
The role of defects at all the relevant stages of the β$\beta$‐ to γ$\gamma$‐Ga2O3 polymorph transition is investigated using a multi method approach. The positron annihilation spectroscopy based results show that the defect density decreases after the transition, and that changes in defect configuration within the γ phase occur with increasing ...
Umutcan Bektas, Maciej O. Liedke, Huan Liu, Fabian Ganss, Maik Butterling, Nico Klingner, René Hübner, Ilja Makkonen, Andreas Wagner, Gregor Hlawacek   +9 more
wiley   +1 more source

Návrh ekonomicky výhodného technologického procesu výroby rotorových a statorových plechů indukčního snímače polohy vystřihováním a zkružováním [PDF]

, 2013
Paper concerns innovation of production of rotor and stator plates of inductive position sensors which are used at automatization of production processes. Authors analyse possibility of efficiency improvement of production of these devices in joint-stock
Zlámalík, Jan, Čada, Radek
core  

Biomimetic Iridescent Skin: Robust Prototissues Spontaneously Assembled from Photonic Protocells

Advanced Functional Materials, EarlyView.
Uniform nanoparticles are induced to form arrays (photonic crystals) in the cores of biopolymer capsules, endowing these ‘protocells’ with structural color. These protocells are then assembled into large self‐standing objects, i.e., prototissues, with robust mechanical properties as well as iridescent optical properties.
Medha Rath, Briahnah Streeter, Satyam Srivastava, Jemma Wood, William E. Bentley, Taylor J. Woehl, Srinivasa R. Raghavan   +6 more
wiley   +1 more source

On-line diagnostics of transformer winding insulation failures, by Park`s vector approach [PDF]

, 2002
This paper presents a non-invasive approach for diagnosing winding insulation failures in three-phase transformers, which is based on the on-line monitoring of the primary and secondary current Park's Vector.
Cardoso, A. J. Marques, Oliveira, L. M. R.   +1 more
core  

Defect‐Mediated Scintillation in Fully Inorganic Perovskites via Water‐Induced 0D/3D Phase Modulation

Advanced Functional Materials, EarlyView.
A reproducible synthesis to control 3D/0D phase ratios via water‐tuned solvent–antisolvent methods is presented. Enhanced scintillation yield and ultrafast decay are achieved. Defect‐driven emission mechanisms are revealed through cathodoluminescence and radioluminescence, shedding light on the underexplored role of the 0D Cs4PbBr6 and mixed 0D/3D ...
Mario Calora, Francesco Carulli, Nadir Vanni, Antonella Giuri, Elena Ferrari, Matteo Masino, Laura Lazzarini, Francesca Rossi, Gianluca Accorsi, Anna Moliterni, Davide Altamura, Cinzia Giannini, Luca Cappelletti, Gianluca Quarta, Alberto Quaranta, Rosanna Mastria, Anna Paola Caricato, Sergio Brovelli, Aurora Rizzo   +18 more
wiley   +1 more source

Modeling of Axial Displacements of Transformer Windings for Frequency Response Analysis Diagnosis

Energies
The aim of the article is to present the method of modeling the frequency response of the transformer windings with axial displacements. Frequency response analysis (often referred to as FRA or SFRA) is a powerful and sensitive method for testing the ...
Katarzyna Trela, Konstanty Marek Gawrylczyk   +1 more
doaj   +1 more source

Electro-magnetic Tooling for Metal Forming and Powder Compaction [PDF]

, 2004
The multipurpose FE Code ANSYS is employed to simulate an electro-magnetic forming process. A complicated compression coil with a ferromagnetic outer screen and a stepped field shaper is considered.
Kladas, A. G., Koumoutsos, A. K., Mamalis, A. G., Manolakos, D. E.   +3 more
core  

Recent Advances in Localization of Winding Deformation in a Transformer

, 2010
This chapter presents a mathematical approach to tackle the problem of localization of deformations in transformer windings. The approach essentially comprises of converting the measured driving-point impedance (via circuit synthesis) into a physically realizable, mutually coupled, ladder network that reproduces the measured characteristics as closely ...
L, Satish, K, Ragavan
openaire   +3 more sources