Results 11 to 20 of about 38,230 (266)

Dead-time generation in six-phase frequency inverter / Tranzistorių valdymo signalų vėlinimo grandinės šešiafaziame dažnio keitiklyje

open access: yesMokslas: Lietuvos Ateitis, 2016
In this paper control of multi-phase induction drives is discussed. Structure of six-phase frequency inverter is examined. The article deals with dead-time generation circuits in six-phase frequency inverter for transistor control signals.
Aurelijus Pitrėnas
doaj   +1 more source

Experiment research on haulage performance of non-onboard speed regulation system of shearer

open access: yesGong-kuang zidonghua, 2014
The paper researched haulage performance of speed regulation system of non-onboard shearer in different control methods, analyzed influence of long hauling cable on haulage performance of frequency converter when the non-onboard speed regulation system ...
ZHUANG Deyu
doaj   +1 more source

Comparison of Induction Machine Drive Control Schemes on the Distribution of Power Losses in a Three-Level NPC Converter

open access: yesMachines
Medium- and high-power drive applications have grown since the past decade as the most common solution for high demanding industrial processes. Multilevel converters, in particular the three-level neutral point clamped (3L-NPC) topology driving medium ...
Carlos A. Reusser   +3 more
doaj   +1 more source

Time-Optimal Control Problem of Two Non-Synchronous Oscillators

open access: yesMathematics, 2022
The time-optimal control problem for a system consisting of two non-synchronous oscillators is considered. Each oscillator is controlled with a shared limited scalar control. The objective of the control is to accelerate the oscillatory system to a given
Leonid Berlin   +2 more
doaj   +1 more source

Stator windings condition diagnosis of voltage inverter-fed induction motor in open and closed-loop control structures

open access: yesArchives of Electrical Engineering, 2015
This paper deals with detection of the stator windings shorted turns in an induction motor drive working under open (scalar) and closed loop (Direct Field Oriented DFO) control structures.
Wolkiewicz Marcin   +2 more
doaj   +1 more source

On a Class of Second-Order PDE&PDI Constrained Robust Modified Optimization Problems

open access: yesMathematics, 2021
In this paper, by using scalar multiple integral cost functionals and the notion of convexity associated with a multiple integral functional driven by an uncertain multi-time controlled second-order Lagrangian, we develop a new mathematical framework on ...
Savin Treanţă
doaj   +1 more source

Postfault Control of Scalar (V/f) Controlled Asymmetrical Six-Phase Induction Machines

open access: yesIEEE Access, 2018
With the accelerated development in semiconductor power devices along with the dictated rigorous reliability standards in some industrial sectors, the application of a medium-voltage high-power multiphase induction machine with multiple three-phase ...
Ayman S. Abdel-Khalik   +3 more
doaj   +1 more source

Simulation of frequency controlled electric drive using scalar control method / Skaliariniu būdu valdomos dažninės elektros pavaros imitacinis tyrimas

open access: yesMokslas: Lietuvos Ateitis, 2013
This paper presents scalar controlled induction motor model and analysis of dynamic characteristics. The paper considers the closed loop electric drive system with proportional-integral-derivative (PID) regulator.
Jonas Kriaučiūnas, Laurynas Kerpė
doaj   +1 more source

Transmission of Mechanical Vibrations in an Electric Drive Unit with Scalar Control—Comparative Analysis with Evaluation Based on Experimental Studies

open access: yesEnergies
Vibration monitoring plays a crucial role in assessing the condition and operational safety of electric drive systems. In many industrial applications, scalar control is widely used due to its simplicity and reliability, yet its influence on vibration ...
Adam Muc, Agata Bielecka
doaj   +1 more source

Why and When Are Evidence‐Based Interventions Adopted in Paediatric Supportive Care? A Qualitative Exploration of the Determinants of Photobiomodulation Implementation

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Oral mucositis is a common and debilitating side effect of childhood cancer and stem cell transplant treatments. It affects the quality of life of children and young people (CYP) and places a strain on services. Photobiomodulation is recommended for oral mucositis prevention in international guidance but is poorly implemented in UK ...
Claudia Heggie   +4 more
wiley   +1 more source

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