Results 61 to 70 of about 381,596 (303)

Multilevel current source converters for high power medium voltage applications

open access: yesCES Transactions on Electrical Machines and Systems, 2017
In medium voltage high power applications, multi-level current source converters (CSCs) are good candidate to increase system power region, reliability, and the quality of output waveforms.
Li Ding, Yujuan Lian, Yun Wei Li
doaj   +1 more source

Loop-at-a-Time Stability Analysis for Grid-Connected Voltage-Source Converters

open access: yesIEEE Journal of Emerging and Selected Topics in Power Electronics, 2020
The instability phenomena caused by converter–grid interactions can be prevented by designing controllers with adequate stability margins. Yet, the multiple-input–multiple-output (MIMO) dynamics of grid-connected voltage-source converters (VSCs ...
Hongyang Zhang   +6 more
semanticscholar   +1 more source

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

open access: yesFEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil   +4 more
wiley   +1 more source

Coordinated Control of Multi-Port Power Router Based on DC Bus Voltage Droop Regulation

open access: yesEnergies
Coordinated operation among various converters within a power router (PR) is crucial for ensuring its normal operation. Since the power balance among converters in a DC PR is reflected by the DC bus voltage level, maintaining stable DC bus voltage ...
Caihong Zhao   +5 more
doaj   +1 more source

Study of Dual Z-Source DC-DC High-Gain Converter for Hydrogen Fuel Cells [PDF]

open access: yesDianli jianshe
[Objective] In response to the insufficient boost capability and excessive device stress when conventional converters are applied to hydrogen fuel cell grid connection, a low electrical stress high-gain single-switch converter based on a dual Z-source ...
TANG Hao, JIANG Fei, MAIMAITIAILI Wufuer, HUA Dong, HE Guixiong
doaj   +1 more source

Control of Grid-Connected Voltage-Source Converters: The Relationship Between Direct-Power Control and Vector-Current Control

open access: yesIEEE Industrial Electronics Magazine, 2019
This article discusses the mathematical relationship between gridvoltage-modulated (GVM) direct-power control (DPC) and vector-current control (VCC) for three-phase voltage-source converters (VSCs).
Yonghao Gui   +3 more
semanticscholar   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

open access: yesFEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

Electron transfer between complexes III and IV in S. cerevisiae mitochondrial membranes

open access: yesFEBS Letters, EarlyView.
Mitochondrial oxidative phosphorylation in S. cerevisiae mitoplasts is limited by complex IV catalytic capacity, rather than two‐dimensional cytochrome c diffusion. At physiological cytochrome c : supercomplex ratios at salinity equivalent to that of 20 mm monovalent salt, activity is maximized, indicating that this low ionic strength accurately mimics
Ana Paula Lobez   +2 more
wiley   +1 more source

An Improved Virtual Inertia Control for Three-Phase Voltage Source Converters Connected to a Weak Grid

open access: yesIEEE transactions on power electronics, 2019
The continuous increasing share of power-converter-based renewable energies weakens the power system inertia. The lack of inertia becomes a main challenge to small-scale modern power systems in terms of control and stability. To alleviate adverse effects
Jingyang Fang   +4 more
semanticscholar   +1 more source

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

open access: yesFEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace   +6 more
wiley   +1 more source

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