Results 31 to 40 of about 30,646 (281)
Two-dimensional axisymmetric winding model for finite deformation [PDF]
Computational Mechanics, 2007 A two-dimensional axisymmetric winding model for wound rolls of thin web is developed. The model accounts for radial and axial displacements and radial, circumferential, axial and shear stresses. The roll build-up is modeled as an incremental accretion process.
Ärölä, Kilwa, Von Hertzen, R.
openaire +5 more sources
Methodology to locate and quantify radial winding deformation in power transformers
High Voltage, 2017 Frequency response analysis (FRA) is a tool that can be used to detect changes within the structural geometry of a transformer. One application of FRA is to detect winding displacement after the transformer experiences an overcurrent event.
Steven D. Mitchell, James S. Welsh
doaj +1 more source
Band Gap Formation and Tunability in Stretchable Serpentine Interconnects [PDF]
, 2017 Serpentine interconnects are highly stretchable and frequently used in flexible electronic systems. In this work, we show that the undulating geometry of the serpentine interconnects will generate phononic band gaps to manipulate elastic wave propagation.
Parnell, William J., Zhang, Pu
core +2 more sources
IEEE Access, 2018 It is well-known that the deformation of transformer winding can produce detectable changes to the frequency response spectrum compared with a referenced past measurement.
Mehdi Bagheri +3 more
doaj +1 more source
Investigating inter-turn fault in transformer using TTR and FRA [PDF]
, 2019 Transformers are one of the significant elements in the power system network. The Transformer function is to step up and down the voltages. When the transformer operating in high load, it exposes to failures.
Abdulrazzaq Al-Iedani, Ali Salman
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Topological interface engineering and defect crossing in ultracold atomic gases
, 2012 We propose an experimentally feasible scheme for topological interface engineering and show how it can be used for studies of dynamics of topologically nontrivial interfaces and perforation of defects and textures across such interfaces. The method makes
A. Vilenkin +5 more
core +2 more sources
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
IEEE Access, 2019 Frequency response analysis (FRA) has been widely accepted as a diagnostic tool for power transformer winding deformation faults. Typically, both amplitude-frequency and phase-frequency signatures are obtained by an FRA analyzer.
Zhongyong Zhao +5 more
doaj +1 more source
Implementation of the SFRA method as valuable tool for detection of power transformer active part deformation [PDF]
Tehnika, 2014 The paper presents the SFRA (Sweep Frequency Response Analysis-SFRA) method for analyzing frequency response of transformer windings in order to identify potential defects in the geometry of the core and winding. The most frequent problems (recognized by
Milić Saša D., Ilić Denis M.
doaj +1 more source
Technical and vocational skills (TVS): a means of preventing violence among youth in Nigeria [PDF]
, 2017 Technical and vocational skills are an important tool for reducing violence among youth, especially in Nigeria, who face security challenges due to different kinds of violence.
Ibrahim, Mohammed +1 more
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