Results 21 to 30 of about 360,981 (226)

Temperature Segment Compensation Method of Dissipation Factor for Insulation Diagnosis in Converter Transformer Bushing

open access: yesIEEE Access, 2022
Temperature compensation occupies a significant function in the insulation condition evaluation of converter transformer bushings based on the Frequency Domain Spectroscopy (FDS), which could influence the accuracy of its insulation diagnosis.
Quanmin Dai   +5 more
doaj   +1 more source

Degradation Effects of Base Oils after Thermal and Electrical Aging for EV Thermal Fluid Applications

open access: yesLubricants, 2023
This study presents the experimental results of the effects on base oils after thermal and electrical aging to determine key parameters of next-generation fluids for thermal management in electric vehicles.
Bernardo Tormos   +3 more
doaj   +1 more source

Influence of Copper Particles on Breakdown Voltage and Frequency-Dependent Dielectric Property of Vegetable Insulating Oil

open access: yesEnergies, 2017
The insulating performance of oil is vulnerable to particles especially the conductive particles. This paper investigated the influence of copper particles of micrometer size on the breakdown strength and frequency-dependent properties of vegetable oil ...
Jing Zhang   +4 more
doaj   +1 more source

A Comparison of Dielectric Properties of Palm Oil with Mineral and Synthetic Types Insulating Liquid under Temperature Variation

open access: yesITB Journal of Engineering Science, 2011
Mineral oil is known to have a low biodegradability level and high susceptibility to the fire. These conditions motivate many researchers to look for alternative sources for insulating oil. One of the alternative liquid is palm oil.
Abdul Rajab   +3 more
doaj   +1 more source

Abnormal enhancement to the quality factors of carbon nanotube via defects engineering

open access: yesNano Materials Science, 2022
Low quality (Q) factor is often the limiting factor for high performance carbon nanotube (CNT) resonators. The most commonly used approach to enhance the Q factor of CNTs is to reduce/eliminate the intrinsic defects.
Ke Duan   +4 more
doaj   +1 more source

Methods of Humidityanalysis in Transformer Oil

open access: yesCommunications, 2010
To prevent failure states of transformer, we performed different types of measurements. We made measurements of a frequency dependence of capacity of test transformer immersed in tank with transformer oil.
Miroslav Gutten, Jozef Kudelcik
doaj   +1 more source

Energy Behaviour of Coal Failure under Uniaxial Cyclic Loading/Unloading

open access: yesApplied Sciences, 2023
Coal failure is often the precursor of dynamic disaster. The energy evolution behaviour at different stress values was analysed under the gradation of equal amplitude cyclic loading/unloading.
Chunlai Wang, Ze Zhao, Chang Zuo
doaj   +1 more source

An Experimental Study and Statistical Analysis on the Electrical Properties of Synthetic Ester-Based Nanofluids

open access: yesEnergies, 2022
The rise in power demand today necessitates its generation and transmission at high voltages. The efficient transmission of electric power requires transformers with an insulation system that exhibits excellent dielectric properties.
Suhaib Ahmad Khan   +4 more
doaj   +1 more source

Some remarks on the pore water pressure dissipation patterns from the one-dimensional consolidation test [PDF]

open access: yesArchives of Civil Engineering, 2022
The pattern of pore water pressure dissipation from the one-dimensional consolidation test significantly affects the calculated value of the coefficient of consolidation. This paper discusses the interpretation methodology for laboratory dissipation data
Bartłomiej Szczepan Olek
doaj   +1 more source

The surface signature of the tidal dissipation of the core in a two-layer planet [PDF]

open access: yes, 2014
Tidal dissipation, which is directly linked to internal structure, is one of the key physical mechanisms that drive systems evolution and govern their architecture.
Lainey, V.   +3 more
core   +4 more sources

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