Results 31 to 40 of about 304,222 (342)

Designing functional ferroelectric interfaces from first-principles: dipoles and band bending at oxide heterojunctions

open access: yesNew Journal of Physics, 2019
The fundamental phenomena at ferroelectric interfaces have been the subject of thorough theoretical and computational studies due to their usefulness in a large variety of emergent electronic devices, solar cells and catalysts.
Rusu Dorin   +4 more
doaj   +1 more source

Three-level boost converter with zero voltage transition

open access: yesThe Journal of Engineering, 2017
As compared with the traditional boost converter, the three-level boost converter possesses several advantages, such as lower switch voltage stresses and lower inductor current ripple.
Kuo-Ing Hwu   +2 more
doaj   +1 more source

Low-Cost System with Transient Reduction for Automatic Power Factor Controller in Three-Phase Low-Voltage Installations

open access: yesEnergies
In power engineering, the importance of maintaining a high power factor in low-voltage electrical installations is known. In power substations for industry, the usual method of coupling is to use an automatic power factor controller which connects ...
Gabriel Nicolae Popa   +1 more
doaj   +1 more source

Modified capacitor voltage balancing sorting algorithm for modular multilevel converter

open access: yesThe Journal of Engineering, 2019
The modular multilevel converter (MMC) with large-scale sub-modules has the advantage of simpler modulation, lower switching frequency, and lower harmonic component, thus would be very promising in voltage source converter (VSC)–high voltage direct ...
Jie Zhang   +5 more
doaj   +1 more source

GaN-Based Versatile Waveform Generator for Biomedical Applications of Electroporation

open access: yesIEEE Access, 2020
Biomedical applications often require high-performance power supplies for diagnosis and treatment systems. In particular, modern electroporation techniques for cancer treatment require high-voltage generators with versatile waveform generation.
Hector Sarnago   +5 more
doaj   +1 more source

Integrated capacitors for conductive lithographic film circuits

open access: yes, 2001
This paper reports on fabrication of low-value embedded capacitors in conductive lithographic film (CLF) circuit boards. The CLF process is a low-cost and high speed manufacturing technique for flexible circuits and systems. We report on the construction
Harrey, PM, Evans, PSA, Harrison, DJ
core   +1 more source

Modular multilevel converter with DHB energy-balancing channels for medium-voltage adjustable-speed drives

open access: yesThe Journal of Engineering, 2019
This paper presents a modular multilevel converter (MMC) configuration that utilises energy exchange between sub-modules (SMs) of upper and lower arms, for energy rebalancing.
Mohamed S. Diab   +4 more
doaj   +1 more source

Reliability study on DC-link capacitor in fault states of VSI in elective vehicle

open access: yesThe Journal of Engineering, 2019
DC-input side of the inverter to balance input and output power, eliminate voltage fluctuation, and reduce the voltage spike in the input side. The reliability study on DC-link capacitor under fault state is critical to the safe operation of the whole ...
Fang Yao   +3 more
doaj   +1 more source

The Influence of Thermal Processing with H2 Atmosphere on the Physical Properties and Microstructure for use in Electrolytic Capacitors of Nb [PDF]

open access: yesMaterials Research
This study evaluated the effect of thermal processing in hydrogen (H2) and argon (Ar) atmospheres on the physical and microstructural properties of niobium (Nb) powders for electrolytic capacitors.
A.S. Silva   +8 more
doaj   +1 more source

SIMULTANEOUS ALLOCATION OF MULTIPLE DISTRIBUTED GENERATION AND CAPACITORS IN RADIAL NETWORK USING GENETIC-SALP SWARM ALGORITHM

open access: yesElectrical engineering & Electromechanics, 2020
Purpose. In recent years, the problem of allocation of distributed generation and capacitors banks has received special attention from many utilities and researchers.
Chabane Djabali, Tarek Bouktir
doaj   +1 more source

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