Results 21 to 30 of about 36,636,285 (336)

Power Converter Resonant Control for an Unbalanced and Non-Constant Frequency Supply

open access: yesSensors, 2023
Distorted voltage supplied as unbalanced and/or non-constant frequency can be found in weak grids, such as microgrids, or systems working in islanding mode. These kinds of systems are more sensitive under load changes. Particularly, an unbalanced voltage
Jaime Rohten   +6 more
doaj   +1 more source

Mathematical Simulation of Modes and Characteristics of Asynchronous Motors under Asymmetrical Power Supply [PDF]

open access: yesProblems of the Regional Energetics, 2019
The purpose of this article is to develop a method and algorithm for the calculation of the steady-state mode and static characteristics of the squirrel-cage asynchronous motors that are supplied by a three-phase network with an asymmetrical voltage ...
Malyar V.S.   +3 more
doaj   +1 more source

An investigation into the relationship between the formation of thermal cracked components and PM reduction during diesel combustion using water emulsified fuel

open access: yesJournal of Thermal Science and Technology, 2015
Water-in-diesel emulsion fuel (W/O) operated in diesel engines, shows a significant reduction of particulate matter (PM). In this paper, PM reduction characteristics by thermal decomposition of W/O10 and W/O20 (10vol.% and 20vol.% of water in W/O ...
Hirofumi NOGE   +4 more
doaj   +1 more source

Early life exposure to farm animals and symptoms of asthma, rhinoconjunctivitis and eczema : an ISAAC Phase Three study [PDF]

open access: yes, 2012
We are grateful to the children and parents who willingly cooperated and participated in ISAAC Phase Three and the coordination and assistance by the school staff is sincerely appreciated.
Brunekreef, Bert   +6 more
core   +1 more source

The association between tobacco and the risk of asthma, rhinoconjunctivitis and eczema in children and adolescents : analyses from Phase Three of the ISAAC programme [PDF]

open access: yes, 2012
We are grateful to the children and parents who participated in ISAAC Phase Three and the coordination and assistance by the school staff is sincerely appreciated.
Beasley, Richard   +5 more
core   +1 more source

Impact of PWM strategies on RMS current of the DC-link Voltage Capacitor of a dual-three phase drive [PDF]

open access: yes, 2014
The major drawback of usual dual three-phase AC machines, when supplied by a Voltage Source Inverter (VSI), is the occurrence of extra harmonic currents which circulate in the stator windings causing additional losses and constraints on the power ...
ROUHANA, Najib   +5 more
core   +1 more source

Global variation in the prevalence and severity of asthma symptoms : phase three of the International Study of Asthma and Allergies in Childhood (ISAAC) [PDF]

open access: yes, 2009
Background: Phase Three of the International Study of Asthma and Allergies in Childhood (ISAAC) measured the global prevalence and severity of asthma symptoms in children.
Foliaki, S.   +7 more
core   +1 more source

Performance Evaluation of a PV-Based Multilevel Inverter with Improved THD and Efficiency [PDF]

open access: yesJournal of Applied Research in Electrical Engineering
This work presents the design, simulation, and performance evaluation of a three-phase multilevel inverter (MLI) system integrated with photovoltaic (PV) technology for grid-connected applications.
Parimalasundar Ezhilvannan   +2 more
doaj   +1 more source

Acetaminophen use and risk of asthma, rhinoconjunctivitis and eczema in adolescents : ISAAC Phase Three [PDF]

open access: yes, 2011
Rationale: There is epidemiological evidence that the use of acetaminophen may increase the risk of developing asthma. Objectives: To investigate the risk of asthma and other allergic disorders associated with the current use of acetaminophen in 13- to ...
Christopher K. W. Lai   +14 more
core   +1 more source

Three-Phase Single-Stage Photovoltaic System With Synchronverter Control: Power System Simulation Studies

open access: yesIEEE Access, 2022
The performance of a grid forming inverter integrating solar PV/Wind farms with the grid is currently a topic of wide interest. Synchronverter control is one of the well-known grid forming converter techniques. Evaluation of synchronverter control in the
Ajinkya J. Sonawane, Amod C. Umarikar
doaj   +1 more source

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