Results 31 to 40 of about 343,105 (330)

A Combined Electro-Thermal Breakdown Model for Oil-Impregnated Paper

open access: yesEnergies, 2017
The breakdown property of oil-impregnated paper is a key factor for converter transformer design and operation, but it is not well understood. In this paper, breakdown voltages of oil-impregnated paper were measured at different temperatures. The results
Meng Huang   +3 more
doaj   +1 more source

Accumulation Behaviors of Different Particles and Effects on the Breakdown Properties of Mineral Oil under DC Voltage

open access: yesEnergies, 2019
Particles in transformer oil are harmful to the operation of transformers, which can lead to the occurrence of partial discharge and even breakdown.
Min Dan   +5 more
doaj   +1 more source

Effect of selected parameters on the electrical strength of a high-voltage vacuum insulation system [PDF]

open access: yesArchives of Electrical Engineering, 2023
The article presents the results of laboratory measurements of Ud breakdown voltages in a high-voltage vacuum insulating system for different pressures, contact gaps, type of electrode contacts and type of residual gas inside the discharge chamber. First
Michał Lech, Paweł Węgierek
doaj   +1 more source

Pulsed actuation avoids failure in dielectric elastomer artificial muscles

open access: yesInternational Journal of Smart and Nano Materials, 2014
Dielectric elastomer actuators (DEAs) are a class of artificial muscles capable of large linear strains (well over 100%), and with high energy density, and low cost and weight.
Toma Kobayashi, Stoyan K. Smoukov
doaj   +1 more source

Development time for initiating the mechanisms of electrical breakdown in vacuum

open access: yesITM Web of Conferences, 2018
The paper presents the development time of the slowest basic physical phenomena occurring in the mechanisms initiating the electrical breakdown in vacuum.
Twardosz Grzegorz   +2 more
doaj   +1 more source

Simulation of electrical trees in XLPE cable insulation and electric field analysis

open access: yesThe Journal of Engineering, 2018
To understand the non-breakdown phenomenon during the accelerating electrical tree ageing in cross-linked polyethylene (XLPE) cable insulation, the non-breakdown mechanism of electrical tree is investigated in this study.
Gang Ye   +3 more
doaj   +1 more source

Violation of Wiedemann-Franz law at the Kondo breakdown quantum critical point

open access: yes, 2008
We study both the electrical and thermal transport near the heavy-fermion quantum critical point (QCP), identified with the breakdown of the Kondo effect as an orbital selective Mott transition.
C. Pépin   +6 more
core   +1 more source

Effect of electric pulse on functional groups and methane adsorption characteristics of anthracite coal

open access: yesMeikuang Anquan, 2022
The experiment of electric pulse cracking of anthracite coal from Jiaozishan Coal Mine in Guizhou Province was carried out by using the electric pulse experimental system of fracturing and enhancing permeability of coal.
YAN Fazhi   +5 more
doaj   +1 more source

Non-Linear I-V Characteristics of Double Schottky Barriers and Polycrystalline Semiconductors

open access: yes, 1992
An attempt to determine theoretically the highly non-linear current-voltage (I-V) characteristics of polycrystalline semiconductors, such as ZnO-based varistors, is made from the electrical properties of individual grain boundaries under dc bias.
Bernasconi   +30 more
core   +1 more source

Dramatically enhanced electrical breakdown strength in cellulose nanopaper

open access: yesAIP Advances, 2016
Electrical breakdown behaviors of nanopaper prepared from nanofibrillated cellulose (NFC) were investigated. Compared to conventional insulating paper made from micro softwood fibers, nanopaper has a dramatically enhanced breakdown strength.
Jianwen Huang   +3 more
doaj   +1 more source

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