Results 1 to 10 of about 10,571 (180)

Novel Characterization of Si- and SiC-Based PWM Inverter Bearing Currents Using Probability Density Functions

Energies, 2022
The high frequency PWM voltage pulses from a two-level six-switch inverter produce a common-mode voltage in an electric machine’s windings, a fraction of which appears on the machine shaft due to electrostatic (capacitive) coupling.
Ryan Collin, Alex Yokochi, Annette von Jouanne   +2 more
doaj   +1 more source

Study of Radiation-Chemical Structuring of Compositions Based on Epoxy Oligomers

East European Journal of Physics, 2020
The processes of radiation-chemical structuring of modified epoxy acrylic compositions were studied depending on the nature of epoxy oligomers and modifiers.
Lidiya F. Podhornaya, Vyacheslav L. Avramenko, Oleh H. Karandashov   +2 more
doaj   +1 more source

Comparison of the Interrupting Capability of Gas Circuit Breaker According to SF₆, g³, and CO₂/O₂ Mixture

Energies, 2020
In the study, an interrupting performance test on the 145 kV gas circuit breaker is performed according to three different gases: SF6, g3 (5% NovecTM4710 with 95% CO2), and CO2(70%)/O2(30%) gases. Thanks to research advancements, it is confirmed that CO2
Woo-Young Lee, Jang-Un Jun, Ho-Seok Oh, Jun-Kyu Park, Yeon-Ho Oh, Ki-Dong Song, Hyun-Jae Jang   +6 more
doaj   +1 more source

Analysis of the Influence Factors of Post-Arc Dielectric Recovery on DC Vacuum Circuit Breaker

工程科学与技术, 2023
The DC vacuum circuit breaker adopts the artificial zero crossing commutation mode to interrupt the DC fault current, which is one of the control and protection methods that combines economy and reliability in DC system.
Xiaoming LIU, Hongfei SHI, Hai CHEN, Wentao JIANG, Yongjie ZHOU, Jiyan ZOU, Jun TIAN   +6 more
doaj  

A Dual Enhancement Switching Technology for Vacuum Circuit Breakers in Various AC-Based Operational Environments

IEEE Access
Vacuum circuit breakers (VCBs) have gained the attention of the medium voltage community for their involvement in various applications. However, the problem of arc-reignition is still under investigation with R-C snubber circuits considered as the most ...
Tamer Eliyan, Saad F. Al-Gahtani, Z. M. S. Elbarbary, Fady Wadie   +3 more
doaj   +1 more source

Combined Effect of the Parameters of Vacuum Interrupter and L-C Circuit Upon Arc Re-Ignition in HVDC Circuit Breakers

IEEE Access
The new horizons for HVDC systems and their applications has intensified the research in HVDC protection systems. The HVDC circuit breakers (CB) has been the center of the protection systems with vacuum interrupters (VIs) showcasing a great potential for
Tamer Eliyan, Ali Saeed Almuflih, Z. M. S. Elbarbary, Fady Wadie   +3 more
doaj   +1 more source

Study on Flow and Heat Transfer Characteristics of Battery Thermal Management System with Supercritical CO₂ for Energy Storage Stations

Energies
Energy storage stations (ESSs) need to be charged and discharged frequently, causing the battery thermal management system (BTMS) to face a great challenge as batteries generate a large amount of heat with a high discharge rate.
Ya Wang, Fengbin Li, Feng Cao, Shaozhong Liang, Jian Fu   +4 more
doaj   +1 more source

Investigation of Fatigue Failure and Electrical Insulation Properties of Glass Fiber-Reinforced Epoxy Resin (EPGF) Composites Under Different Temperatures

Energies
This study investigates the influence of temperature on the bending properties, fatigue life, and breakdown voltage of glass fiber/epoxy composites (EPGF).
Bowen Xu, Jinghan Wang, Chenglu Wang, Chen Cao   +3 more
doaj   +1 more source

Study on the influence of mechanism dispersion on transient recovery voltage distribution of modular DC vacuum circuit breakers

High Voltage
A simulation analysis and an experiment are carried out to investigate how the gap difference between the breaks of a direct current vacuum circuit breakers with multi‐breaks (MB‐DC VCB) caused by the mechanism dispersion of the breaker influences the ...
Chongyang Huang, Yongshuai Yin, Shuxin Liu, Hanwen Du, Zengyu Shan, Yundong Cao, Shurui Yang   +6 more
doaj   +1 more source

The Failure of Voltage Divider Induced by Insulating Material Degradation Under Coupling Effect of High-Frequency Field and Temperature. [PDF]

Materials (Basel)
Li X, Zhang C, Liu Z, Song J, Tian H, Xie Q, Zhang Z, Li S.   +7 more
europepmc   +1 more source