Results 21 to 30 of about 3,959,172 (249)

Independent Upper- and Lower-Arm Switching Scheme Based on Reference Current Polarity for Three-Level NPC Inverters

open access: yesEnergies, 2021
This study presents a novel switching scheme for three-level neutral point clamped (NPC) inverters. The proposed switching method independently drives the upper- and lower-arm elements of the inverter based on the polarity information of the reference ...
Kangsoon Ahn   +3 more
doaj   +1 more source

Voltage space vector‘s computation for current control in three phase converters

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2012
This work presents two current loop techniques, for three phase voltage source converters (VSC) used as controlled rectifiers (CR) operating at unity power factor.
Alberto Berzoy   +2 more
doaj   +1 more source

Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability

open access: yesApplied Sciences, 2021
This paper proposes an isolated buck-boost topology and control strategy for the photovoltaic (PV) medium-voltage DC (MVDC) converter with low-voltage ride through (LVRT) capability.
Huan Wang   +4 more
doaj   +1 more source

Malaria Control: Current Concepts [PDF]

open access: yesMedical Journal Armed Forces India, 2003
Malaria continues to be a major public health problem in many countries and its role as a military medical problem goes back into antiquity [1], Malaria has the potential to incapacitate such a large number of troops that military operations may be jeopardized [2].
G S, Saiprasad, A, Banerjee
openaire   +2 more sources

Derivation of Motor Mean Phase Currents in PMSM Drives Operating with Low Switching-to-Fundamental Frequency Ratio

open access: yesPower Electronics and Drives, 2019
Pulse width modulation (PWM) of inverter output voltage causes the waveforms of motor phase currents to consist of distinctive ripples. In order to provide suitable feedback for the motor current controllers, the mean value must be extracted from the ...
Jarzebowicz Leszek
doaj   +1 more source

Utilizing Active Rotor-Current References for Smooth Grid Connection of a DFIG-Based Wind-Power System

open access: yesAdvances in Electrical and Computer Engineering, 2020
Large inrush currents emerge abruptly whenever a doubly fed induction generator (DFIG) attempts to connect with the grid. Moreover, a DFIG is highly vulnerable to grid disturbances owing to its direct stator-grid contact, which induces a sizable ...
ALI, M. A. S.
doaj   +1 more source

The current framework for tobacco control [PDF]

open access: yesNew South Wales Public Health Bulletin, 2001
Smoking causes one-third of all cancers and accounts for around 6600 cancer-related deaths in Australia each year. This article describes the draft Tobacco Action Plan 2001–2004, produced by the NSW Department of Health, which aims to improve people’s health by eliminating or reducing their exposure to tobacco.
openaire   +2 more sources

Torque Ripple Reduction for Switched Reluctance Motor with Optimized PWM Control Strategy

open access: yesEnergies, 2018
The high current ripple and torque ripple are the main drawbacks of the switched reluctance motor (SRM) since the nonlinearity and double saliency, which limits its applications. In order to eliminate the current variation and torque ripple, an optimized
Hui Cai   +5 more
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen   +23 more
wiley   +1 more source

The Combined Effect of Obesity and Contraceptive Use on Pulmonary Embolism in Adolescent Females Residing in the United States

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Combined oral contraceptive (COC) use in obese adult women dramatically increases the relative risk of developing a pulmonary embolism (PE). The risk of a PE in obese adolescent females taking contraceptives is currently unknown. The purpose of this investigation was to determine the effect of body mass index (BMI) and contraceptive
John Puetz, Joanne Salas
wiley   +1 more source

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