Results 21 to 30 of about 30,704,010 (205)

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

The International Study of Asthma and Allergies in Childhood (ISAAC) Phase Three: A global synthesis [PDF]

open access: yes, 2013
This ISAAC Phase Three synthesis provides summarised information on the main findings of the study, regional tables and figures related to the prevalence and severity of current symptoms of asthma, rhinoconjunctivitis and eczema in the main regions of ...
Keil, U   +7 more
core   +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

Fast and robust three-dimensional best path phase unwrapping algorithm [PDF]

open access: yes, 2007
What we believe to be a novel three-dimensional (3D) phase unwrapping algorithm is proposed to unwrap 3D wrapped-phase volumes. It depends on a quality map to unwrap the most reliable voxels first and the least reliable voxels last.
Moore, Christopher J.   +5 more
core   +1 more source

Accurate Parameter Estimation for Unbalanced Three-Phase System

open access: yesThe Scientific World Journal, 2014
Smart grid is an intelligent power generation and control console in modern electricity networks, where the unbalanced three-phase power system is the commonly used model. Here, parameter estimation for this system is addressed.
Yuan Chen, Hing Cheung So
doaj   +1 more source

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

Single-to-three phase induction motor sensorless drive system

open access: yesAlexandria Engineering Journal, 2012
This paper presented a single to three-phase induction motor drive system to provide variable output voltage and frequency. The proposed drive system employs only six IGBT switches, which form the front-end rectifier and the output inverter for the one ...
Z.M.S. El-Barbary
doaj   +1 more source

District Heating System Optimisation: A Three-Phase Thermo-Hydraulic Linear Model

open access: yesEnergies, 2023
Investments in the development of the district heating system require a thorough analysis of the technical, economic, and legal aspects. Regarding the technical and economic context, a mathematical model of the district heating system has been proposed ...
Piotr Pałka   +4 more
doaj   +1 more source

Efficiency Analysis of PWM Inverter Fed Three-Phase and Dual Three-Phase High Frequency Induction Machines for Low/Medium Power Applications [PDF]

open access: yes, 2008
A performance analysis of three-phase and dual three-phase (DTP) induction pulsewidth modulation (PWM) inverter-fed motor drives is conducted in this paper. The focus is on the efficiency performance of high-frequency DTP machines compared to their three-
Boglietti, Aldo   +3 more
core   +1 more source

Highly efficient three-phase grid-connected parallel inverter system

open access: yesJournal of Modern Power Systems and Clean Energy, 2018
In this paper, a new three-phase grid-connected inverter system is proposed. The proposed system includes two inverters. The main inverter, which operates at a low switching frequency, transfers active power to the grid.
Evren ISEN, Ahmet Faruk BAKAN
doaj   +1 more source

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