Results 1 to 10 of about 54,235 (185)

Coordination Thermodynamic Control of Magnetic Domain Configuration Evolution toward Low-Frequency Electromagnetic Attenuation [PDF]

open access: yesNano-Micro Letters
Highlights A periodic coordination thermodynamical strategy is proposed to modulate magnetic domain configurations, which is visualized by micromagnetic simulation and off-axis electron holography.
Tong Huang   +11 more
doaj   +2 more sources

Ambient-Dried Silica Xerogels with Enhanced Strength and Thermal Insulation via Calcium Ion-Glycerol Synergistic Crosslinking [PDF]

open access: yesGels
Despite their high porosity and wide applicability, silica xerogels face mechanical strength limitations for high-performance applications. This study presents an ambient-pressure sol-gel strategy utilizing calcium-glycerol synergy to produce robust ...
Xiaoyu Xie   +8 more
doaj   +2 more sources

Consideration of insulation coordination in power converters: Basic terminology and review of standards in the field [PDF]

open access: yesZbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2021
Insulation coordination in the field of power electronics has become a very important issue. It certainly deserves the attention of both designers and users of various topologies of power converter modules and devices.
Despotović Željko V.
doaj   +1 more source

Characteristic example of insulation coordination in power converters [PDF]

open access: yesZbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2021
Power electronics devices and modules that are most often used in power supply systems when compared to the passive components usually exhibit a very poor ability to withstand surge voltages.
Despotović Željko V.
doaj   +1 more source

Insulation stresses of power equipment exposed to non-standard overvoltage waveforms [PDF]

open access: yesZbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2022
During its operation, electrical equipment is constantly exposed to overvoltages of various waveforms, such as lightning discharges, switching operations, faults, etc.
Jasika Ranko   +2 more
doaj   +1 more source

Review of Standards on Insulation Coordination for Medium Voltage Power Converters

open access: yesIEEE Open Journal of Power Electronics, 2021
The increasing viability of wide band gap power semiconductors, widespread use of distributed power generations, and rise in power levels of these applications have increased interest and need for medium voltage converters.
Saban Ozdemir   +3 more
doaj   +1 more source

Influence of ionizing radiation on the stochasticity of overvoltage protection at low, medium, and high voltage levels in gas surge arresters [PDF]

open access: yesNuclear Technology and Radiation Protection, 2023
The paper considers the possibility of improving the technical characteristics of gas surge arresters for the co-ordination of insulation at low voltage, medium voltage and high voltage levels. The idea for improving the characteristics of a gas
Jusić Alija R.   +2 more
doaj   +1 more source

Overvoltage and insulation coordination of flexible DC distribution network with DC circuit breaker

open access: yes电力工程技术, 2023
With the continuous application and popularization of distributed energy, DC power distribution will become the mainstream form of future power distribution system.
LIU Shuhan   +5 more
doaj   +1 more source

Commutation overshoots based on a novel model for series thyristors during the turn-off process

open access: yesHigh Voltage, 2020
The commutation overshoot is an important reference index for the insulation coordination of the converter station as well as the thyristor voltage capacity.
Yingjie Tang   +4 more
doaj   +1 more source

Using alternative transient program and electromagnetic transients programs (ATP/EMTP) in lightning overvoltages analysis [PDF]

open access: yesZbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2016
The goal of this paper is to introduce a procedure for risk assessment of insulation failure due to storm surges. The simulations were carried out in ATP / EMTP software, which allowed the use of the Monte Carlo method for the statistical analysis of ...
Mrvić Jovan   +4 more
doaj   +1 more source

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