Results 21 to 30 of about 420 (253)

Analysis of Winding Vibration Characteristics of Power Transformers Based on the Finite-Element Method

open access: yesEnergies, 2018
The winding is the core component of a transformer, and the technology used to diagnose its current state directly affects the operation and maintenance of the transformer.
Xiaomu Duan   +4 more
doaj   +1 more source

Improved Winding Mechanical Fault Type Classification Methods Based on Polar Plots and Multiple Support Vector Machines

open access: yesIEEE Access, 2020
The accurate and fast diagnosis of transformer winding deformation faults is of significance to power suppliers and utilities. An improved winding mechanical deformation fault classification method is proposed.
Jiangnan Liu   +5 more
doaj   +1 more source

Analysis of the Electromechanical Characteristics of Power Transformer under Different Residual Fluxes

open access: yesEnergies, 2021
When the electromagnetic transients occur in a power transformer, an inrush current is generated in its winding. The inrush current not only affects the performance of the transformer windings, but also affects the lifetime of the transformer.
Wenqi Ge   +4 more
doaj   +1 more source

An Experimental Study of the Sweep Frequency Impedance Method on the Winding Deformation of an Onsite Power Transformer

open access: yesEnergies, 2020
Power transformers are one of the most important devices in electrical networks. The safety operation of the transformers directly affects the reliability of the power system. To diagnose the internal deformation of the transformer as soon as possible is
Song Wang   +6 more
doaj   +1 more source

Analysis and Online Testing of the Transformer Winding Deformation

open access: yesProcedia Engineering, 2012
AbstractThe theory analyses by using finite element method show that winding deformation would inevitably lead to the changes of three-phase transformer's magnetic field. Once short-circuit faults happened, the three-phase transformer winding distortions and distortion location can be quickly detected through analyzing the spectrum correlation ...
Liu, Baobin, Zhou, Wei
openaire   +1 more source

Axial and radial electromagnetic‐vibration characteristics of converter transformer windings under current harmonics

open access: yesHigh Voltage, 2023
The winding current harmonic content of converter transformer in operation is rich. However, affected by harmonics, the radial vibration characteristics are quite different from the power transformer, structural loosening and deformation caused by ...
Peiyu Jiang   +5 more
doaj   +1 more source

Evaluation on mechanical stability of transformer windings based on vibration detection

open access: yesZhejiang dianli, 2022
Insufficient mechanical stability of transformer winding is the leading cause of equipment accidents. Scientific evaluation of its mechanical stability is of positive significance for reducing equipment accidents and improving maintenance pertinence ...
HE Wenlin, ZHENG Yiming
doaj   +1 more source

Loss of proton‐sensing TDAG8 increases tumor progression in mouse models of colon cancer

open access: yesMolecular Oncology, EarlyView.
Loss of the pH‐sensing receptor TDAG8 accelerates colorectal cancer progression in mice. Animals lacking TDAG8 expression had increased tumor growth, DNA damage, and recruitment of tumor‐associated immune cells, including macrophages, neutrophils, and monocytes.
Ermanno Malagola   +11 more
wiley   +1 more source

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende   +26 more
wiley   +1 more source

Structure–Function Decoupling of the Sensorimotor and Default Mode Networks in Black Americans With MS

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background and Objectives Multiple sclerosis (MS) exhibits racially disparate rates of disease progression. Black people with MS (B‐PwMS) experience a more severe disease course than non‐Hispanic White people with MS (NHW‐PwMS). Here we investigated structural and functional connectivity as well as structure–function decoupling in the ...
Emilio Cipriano   +11 more
wiley   +1 more source

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