Results 61 to 70 of about 27,854 (312)

A coupled inductor based high gain Z source DC DC converter with low voltage stress on switches for solar PV applications

Scientific Reports
To attain a high voltage gain between the source and the load, source-impedance networks are employed. Unlike the first suggested topologies without magnetically connected inductors, magnetically coupled source-impedance networks are suggested to obtain ...
Oktay Shafiei-Fasaghandis, Hasan Alipour, Leila Mohammadian, Taher Abedinzadeh, Jaber Pouladi   +4 more
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Inversor trifásico PWM fonte de tensão com integração de interruptores em delta [PDF]

, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Elétrica, Florianópolis, 2013.Este trabalho apresenta o estudo de uma nova topologia de um conversor trifásico dois níveis ...
Bezerra, Pedro André Martins
core  

Experimental Evaluation of a 2 kW/100 kHz DC–DC Bidirectional Converter Based on a Cuk Converter Using a Voltage-Doubler Concept

Energies
This paper presents a theoretical analysis of steady-state operation, control-oriented modeling for voltage control, and the experimental results of a DC–DC bidirectional converter based on a Cuk converter using a voltage-doubler concept.
Wanderson Francisco Lopes, Mário Lúcio da Silva Martins, Attilio Converti, Hugo Valadares Siqueira, Carlos Henrique Illa Font   +4 more
doaj   +1 more source

A novel bidirectional DC-DC converter

Gong-kuang zidonghua, 2016
For shortages of traditional Buck-Boost converters such as limited output voltage, poor stability, low voltage gain and so on, a novel bidirectional DC-DC converter was designed which used Z-source network to connect DC input power and load.
FANG Xupeng, ZHUANG Jianwei, LI Hui
doaj   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Conversor CC-CC buck+boost multinível bidirecional [PDF]

, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-graduação em Engenharia Elétrica, Florianópolis, 2013Este trabalho apresenta uma nova topologia de conversor cc-cc Buck+Boost bidirecional multinível ...
Costa, Levy Ferreira
core  

Control of Six-Phase Voltage Source Converters Using Dynamic Voltage Vectors [PDF]

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019
IEEE Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
Juan Jose Aciego, Ignacio González Prieto, Mario J. Durán   +2 more
openaire   +2 more sources

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

A multilevel voltage-source converter system with balanced DC voltages [PDF]

Proceedings of PESC '95 - Power Electronics Specialist Conference, 2002
In this paper, a multilevel voltage-source converter system is proposed for high-voltage, high-power applications such as back-to-back interconnection of power systems, large induction motor drives, and electrical traction drives. Multilevel voltage-source converters have a voltage unbalance problem in the DC capacitors.
Peng, Fang Zheng, Lai, Jih-Sheng, McKeever, J., VanCoevering, J.   +3 more
openaire   +1 more source