Results 71 to 80 of about 5,295 (187)

Modulation Technique Applied for THD Reduction in 3-level Flying Capacitor Multilevel Inverter

Eletrônica de Potência, 2014
This paper introduces a modulation technique for a three-level flying capacitor multilevel inverter applied in THD reduction. The proposed modulation improves power quality, reducing the total harmonic distortion and combining the advantages of two ...
Davi R. Joca, Luiz H. S. C. Barreto, Demercil S. Oliveira Jr., Gustavo A. L. Henn, Ranoyca N. A. L. Silva   +4 more
doaj   +1 more source

Robust Control Using a Matrix Converter to Enhance Wind Turbine Systems

Energy Science &Engineering, EarlyView.
This study uses a more efficient and effective solution to improve the operational performance of a wind turbine‐based power system. This system uses a doubly fed induction generator and relies on a matrix converter and fractional‐order proportional–integral controller.
Sihem Ghoudelbourk, Habib Benbouhenni, Adil Yahdou, Zakaria Mohamed Salem Elbarary, Nicu Bizon   +4 more
wiley   +1 more source

Time to Breakdown for Type I Motor Winding Insulation Under High‐Frequency High‐Slew‐Rate Square Wave Voltages

High Voltage, EarlyView.
ABSTRACT The emergence of (ultra)wide bandgap ((U)WBG)‐based devices has significantly enhanced performance in high‐frequency switching applications, enabling breakthroughs in electric transportation, aerospace, and renewable energy systems. However, it also presents considerable challenges to insulation systems, such as electric motor winding ...
Easir Arafat, Md Asifur Rahman, Farzana Islam, Mona Ghassemi   +3 more
wiley   +1 more source

DIFFERENCE BETWEEN OF PWM STRATEGIES FOR INVERTER FED INDUCTION MOTOR

Journal of Engineering, 2009
Several sophisticated or "optimum" modulation strategies have been suggested for voltage source pulse with modulated (PWM) inverters for ac motor control. These modulation strategies may suppress specific low – order harmonics or minimize total harmonic.
محمد حسين
doaj   +1 more source

Optimal Operation Strategy of Multiterminal AC–DC Interconnected Distribution Networks With SOP

IET Smart Energy Systems, EarlyView.
To improve the operational economy of distribution networks with high penetration of renewable energy, this paper studies the AC–DC interconnected distribution networks with multi‐terminal soft open points (SOPs) and its optimal operation strategy. ABSTRACT To improve the operational economy of distribution networks with high penetration of renewable ...
Xiaolong Yang, Hongbo Wang, Jiaxu Cui, Fang Liu, Jingzhi Wang   +4 more
wiley   +1 more source

A Study on the Performance Evaluation of F-Type Multilevel Inverters Employing Phase Disposition Carrier PWM Schemes

IEEE Access
This research presents a three-phase, three-level F-type inverter utilizing a four switch per leg and a DC link. The proposed structure necessitates less power components than traditional three-level inverter topologies, hence reducing switching stress ...
Meenakshi Madhavan, Chellammal Nallaperumal, Rajesh Verma, Bharatiraja Chokkalingam, Lucian Mihet-Popa   +4 more
doaj   +1 more source

Neural correlates of pure apathy in multiple sclerosis: An exploratory neuroimaging study

Journal of Neuropsychology, EarlyView.
Abstract Pure apathy is relatively common in people with Multiple Sclerosis (PwMS), but its neural mechanisms remain unexplored. Therefore, we investigated the neural correlates of pure apathy in PwMS, differentiating it from depression. Sixty‐two PwMS underwent neuropsychological assessments and Magnetic Resonance Imaging scans.
Valentina Torchia, Vera Gramigna, Mariachiara Gaita, Daniele Spitaleri, Antonio Costanzo, Liana Palermo, Florindo d'Onofrio, Simona Raimo   +7 more
wiley   +1 more source

PROPERTIES AND PECULIARITIES OF SPACE-VECTOR-BASED SYNCHRONIZED MODULATION FOR POWER ELECTRONIC CONVERTERS

Problems of the Regional Energetics, 2010
This paper presents brief description of peculiarities of a novel method of synchronized pulsewidth modulation (PWM) for power electronic converters. Comprehensive comparison with standard PWM techniques has been done.
Oleschuk V.I.
doaj  

Thermal Behavior Improvement in Induction Motors Using a Pulse-Width Phase Shift Triangle Modulation Technique in Multilevel H-Bridge Inverters

Machines
This study investigates the thermal performance of induction motors powered by multilevel H-bridge inverters using a novel pulse-width phase shift triangle modulation (PSTM-PWM) technique.
Francisco M. Perez-Hidalgo, Juan-Ramón Heredia-Larrubia, Antonio Ruiz-Gonzalez, Mario Meco-Gutierrez   +3 more
doaj   +1 more source

Sleep Macrostructure, Cyclic Alternating Pattern and CSF Cytokines in De Novo Relapsing–Remitting Multiple Sclerosis: A Controlled Polysomnographic Study

Journal of Sleep Research, EarlyView.
ABSTRACT Multiple sclerosis is frequently associated with sleep disorders. This study aimed to evaluate subjective and objective sleep parameters in de novo relapsing–remitting multiple sclerosis patients compared to healthy controls and to explore correlations with cerebrospinal fluid cytokines.
A. Romigi, M. Stampanoni Bassi, M. Caccamo, L. Gilio, F. Ceriello, A. Finardi, G. Vitrani, I. Rosenzweig, R. Furlan, F. Buttari, D. Centonze   +10 more
wiley   +1 more source