Results 81 to 90 of about 13,271,672 (251)

Analysing Electrophoretic Deposition Using Transient Current Measurements

open access: yes, 2022
Electrophoretic deposition (EPD) is a widely used technique for coating surfaces with colloidal particles [1]. When using apolar solvents, one or more surfactants are required as charging agents. These surfactant molecules do not only adsorb to the particles, assisting in particle charging, but also aggregate into inverse micelles of which a small ...
Delporte, Rogier   +2 more
openaire   +2 more sources

Examining the Linear Cooling Characteristics of Microfluid Based on Thermoelectric Refrigeration

open access: yesZhileng xuebao
Currently, the precise linear cooling of microfluidics remains a challenge in the development and application of microfluidic technology in medicine and life sciences.
Wang Haoqing   +8 more
doaj  

Transient Power Angle Control for a Droop-Controlled Voltage Source Converter Considering Fault Current Limitation

open access: yesCSEE Journal of Power and Energy Systems
Voltage source converters (VSCs), equipped with $P-f$ and $Q-U$ droop characteristics, can support a power system from both frequency and voltage. Unfortunately, overcurrent and power angle instability are still challenging aspects of VSCs under fault ...
Pingjuan Ge   +5 more
doaj   +1 more source

Immediate Analysis of Periodic Steady States in Switched DC-DC Converters via SPICE [PDF]

open access: yes, 2012
The method of immediate analysis of periodic steady states in switched DC-DC converters operating in the continuous current mode is described. The initial conditions, which correspond to the periodic steady state, are found in the first step.
Biolek, Dalibor   +2 more
core   +1 more source

A multi-stage DC current control strategy for suppressing transient overvoltage of LCC-HVDC sending end grid

open access: yesInternational Journal of Electrical Power & Energy Systems
The fast DC current recovery is widely adopted in the existing Voltage Dependent Current Order Limiter (VDCOL) for Line Commutated Converter-based High Voltage Direct Current (LCC-HVDC) systems to mitigate transient overvoltage in the sending-end grid ...
Bo Pang   +6 more
doaj   +1 more source

Coordinated Control Strategy for Current Inner Loops to Enhance Transient Synchronization Stability During LVRT Under Symmetrical Faults [PDF]

open access: yesDianli jianshe
[Objective] Grid-following converters (GFL) are widely employed in renewable energy grid integration systems. When grid faults cause voltage sags,the system enters a low voltage ride-through (LVRT) process.
SUN Li, ZHI Tianyang, LIU Hongbo, MA Chenglian
doaj   +1 more source

Radio wavelength transients: Current and emerging prospects [PDF]

open access: yesAstronomische Nachrichten, 2008
AbstractKnown classes of radio wavelength transients range from the nearby stellar flares and radio pulsars to the distant Universe γ‐ray burst afterglows. Hypothesized classes of radio transients include analogs of known objects, e.g., extrasolar planets emitting Jovian‐like radio bursts and giant‐pulse emitting pulsars in other galaxies, to the ...
openaire   +2 more sources

A current limiting strategy for grid-forming converters based on voltage deviation adaptive virtual impedance

open access: yesInternational Journal of Electrical Power & Energy Systems
Grid-forming (GFM) converters face the risk of saturation under large disturbances, which will degrade the stability performance of the system. Most existing adaptive virtual impedance methods generate virtual impedance based on current limit values ...
Longyue Wang, Pengfei Hu, Weixuan Zhang
doaj   +1 more source

Microscopic Current Dynamics in Nanoscale Junctions

open access: yes, 2007
So far transport properties of nanoscale contacts have been mostly studied within the static scattering approach. The electron dynamics and the transient behavior of current flow, however, remain poorly understood.
G. F. Giuliani   +12 more
core   +1 more source

Bistability signatures in nonequilibrium charge transport through molecular quantum dots

open access: yes, 2012
We investigate the transient nonequilibrium dynamics of a molecular junction biased by a finite voltage and strongly coupled to internal vibrational degrees of freedom.
Albrecht, Klaus Ferdinand   +4 more
core   +1 more source

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