Results 21 to 30 of about 2,467,579 (312)

Progressive Antithrombin: A Three-Phase System [PDF]

open access: yesBlood, 1966
Abstract 1. Data are presented which demonstrate that progressive antithrombin activity results from the interaction of three factors: antithrombin, an antithrombin inhibitor, and a platelet factor. In plasma, the antithrombin is held inactive by combination with inhibitor so that no free antithrombic activity is present.
H H, Henstell, M, Kligerman
openaire   +2 more sources

Improving Inverter Output Current Controller Under Unbalanced Conditions by Using Virtual Impedance

open access: yesIEEE Access, 2021
Nowadays, three-phase inverters have been commonly used in power systems, especially in renewable energy and motor drives applications. In many applications, the inverter has to generate balanced sinusoidal three-phase currents even though it is ...
Lukas Antonio Budiwicaksana   +4 more
doaj   +1 more source

Robust repetitive feedback control of a three-phase grid connected inverter [PDF]

open access: yes, 2010
This paper discusses the design of a repetitive feedback controller for a grid-connected two-level three-phase voltagesource inverter connected between a DC source and the grid through an LCL filter.
Sharkh, S.M.   +8 more
core   +1 more source

Adaptive nonlinear control of single-phase to three-phase UPS system

open access: yesMATEC Web of Conferences, 2014
This work deals with the problems of uninterruptible power supplies (UPS) based on the single-phase to three-phase converters built in two stages: an input bridge rectifier and an output three phase inverter.
Kissaoui M.   +4 more
doaj   +1 more source

Power Management in Three-Phase Grid-Integrated PV System with Hybrid Energy Storage System

open access: yesEnergies, 2023
The management of energy in distribution networks has been gathering attention in recent years. The simultaneous control of generation and demand is crucial for achieving energy savings and can further lower energy pricing.
Chinmaya Jagdev Jena, Pravat Kumar Ray
doaj   +1 more source

Geometric Phase of Three-Level Systems in Interferometry [PDF]

open access: yesPhysical Review Letters, 2001
We present the first scheme for producing and measuring an Abelian geometric phase shift in a three-level system where states are invariant under a non-Abelian group. In contrast to existing experiments and proposals for experiments, based on U(1)-invariant states, our scheme geodesically evolves U(2)-invariant states in a four-dimensional SU(3)/U(2 ...
Sanders, Barry C.   +3 more
openaire   +3 more sources

Mathematical Modelling of Transient Processes in a Three Phase Electric Power System for a Single Phase Short-Circuit

open access: yesEnergies, 2022
Field approaches are employed to develop a mathematical model of a power network section. The facility consists of two electric power subsystems described with ordinary differential equations and presented as concentrated parameter systems connected with
Andriy Chaban   +3 more
doaj   +1 more source

Muscle: A Three Phase System [PDF]

open access: yesThe Journal of General Physiology, 1959
The partition of sulfate, Ca++, and Mg++ across the membrane of the sartorius muscle has been studied, and the effect of various concentrations of these ions in the Ringer solution on the cellular level of Na+, K+, and Cl- has been determined. The level of the three divalent ions in toad plasma and muscle in vivo has been assayed. Muscle
R. Frater, Shirley E. Simon, F. H. Shaw
openaire   +3 more sources

Five-phase version of 12slots/8poles three-phase Synchronous Machine for Marine-propulsion [PDF]

open access: yes, 2014
Multiphase machines are widely used in electric marine propulsion especially because of their fault-tolerance which allows to guarantee the propulsion even if a fault occurs in the electrical system.
SCUILLER, Franck   +5 more
core   +1 more source

Effective Harmonic Cancellation Technique for a Three-Phase Four-Wire System

open access: yesEnergies, 2022
An excess non-linear and unbalanced load application increases the power quality (PQ) problem by injecting harmonic current. The avoidance of neutral current control creates additional PQ problems due to excess circulating current in modern 3φ4W ...
Buddhadeva Sahoo   +2 more
doaj   +1 more source

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