Results 11 to 20 of about 339,697 (206)

Numerical simulation study of rock breaking mechanism by high voltage electric pulse

open access: yes矿业科学学报, 2023
High-voltage electric pulse(HVEP)drilling has become a new and efficient rock breaking method, which is also the research focus in the field of drilling speed increase.
Liu Weiji   +3 more
doaj   +1 more source

Study Of Measurements Leakage Current In Oil Transformer

open access: yesDiyala Journal of Engineering Sciences, 2020
The oil transformer is used in (H.V ) ment's to avoid the electrical breakdown , and heat effect ,so that the oil using as an insulation  and cooling in electrical  instruments to prevent the failure in the transformer. In our research  the measurements
Hassan J. Mohammed
doaj   +1 more source

Investigation of the Electrical Properties of Mineral Oils with and without Carbon Nanotube Concentration under Different Magnetic Fields Applied in Transformer Applications

open access: yesEnergies, 2023
The increased voltage loading of transformers has led to research on improving transformers’ lifespans to meet demand. Insulation oil acts as cooling medium that can significantly affect the performance of a transformer.
Stephanie Azlyn Anak Felix   +5 more
doaj   +1 more source

Evanescently-coupled hybrid III-V/silicon laser based on DVS-BCB bonding [PDF]

open access: yes, 2010
© 2014 IEEE. Controllable electrical breakdown of multiwall nanotubes (MWNTs) is studied utilizing the atomic force microscopy (AFM). Electrical breakdown has been known as the way to fundamentally understand the electrical properties of nanotubes and an
Heck, J   +5 more
core   +2 more sources

A Comparison of Electrical Breakdown Models for Polyethylene Nanocomposites

open access: yesApplied Sciences, 2022
The development of direct current high-voltage power cables requires insulating materials having excellent electrically insulation properties.
Zhaoliang Xing   +5 more
doaj   +1 more source

Device for testing arc breakdown and spark gap protection devices

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2021
THE PURPOSE. To justify the need to use an arc breakdown protection device (ABPD) in electrical networks up to 0.4 kV, in order to reduce the number of fires.
Yu. N. Erashova   +3 more
doaj   +1 more source

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

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