Results 81 to 90 of about 5,969,124 (243)

Multi-Objective Model Predictive Control to Enhance Performance for Single-Phase 5L-ANPC Converters

IEEE Access
Single-phase five-level active neutral-point-clamped (1P-5L-ANPC) inverters have been widely applied in various applications. However, existing methods cannot simultaneously reduce switching losses, suppress capacitor voltage fluctuations, and ...
Xiaomin Han, Hua Chen, Huiqing Wu, Shuzhen Huang, Hongliang Zhang   +4 more
doaj   +1 more source

Voltage-Balancing Strategy for Three-Level Neutral Point Clamped Cascade Converter under Sequence Pulse Modulation

Energies, 2019
In response to the unbalanced DC-port fault of three-level neutral point clamped cascaded converter (3LNPC-CC), a sequence pulse modulation (SPM) voltage-balancing strategy is proposed in this paper to balance DC-link voltage, not only within the module ...
Le Yu, Xu Peng, Shibin Gao
doaj   +1 more source

Is an Apple an Orange? A Large Language Model Benchmark for Candidate Term Extraction and Subclass Decisions Against Upper Ontologies in Engineering and Materials Science

Advanced Engineering Materials, EarlyView.
Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch, Maximilian Holland, Klaus Drechsler, Johannes Schilp   +3 more
wiley   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

DC-link voltage ripple compensation for multilevel active-neutral-point- clamped converters operated with SHE-PWM

, 2012
This paper presents a dc-link voltage ripple compensation method for flying-capacitor (FC)-based active neutral- point-clamped multilevel converters operating under selective harmonic elimination pulsewidth modulation.
Sridhar Pulikanti (20124879), Georgios Konstantinou (18879865), Vassilios G Agelidis (14254454)   +2 more
core   +1 more source

DC-Link capacitor voltage balancing in Neutral Point Clamped inverters using Space Vector Modulation

, 2016
Neutral point balancing is an inherent problem of Neutral Point Clamped (NPC) inverter. In this paper, various techniques to balance neutral point voltage is presented. Most of these techniques uses the redundancy of Space Vector Modulation (SVM) for NPC
Ragavan, K., Chand, Mohit
core   +1 more source

VSC transmission system using flying capacitor multilevel converters and hybrid PWM control [PDF]

, 2007
A high-voltage direct current (HVDC) transmission system based on three-level flying capacitor (FC) multilevel converters with hybrid pulse-width modulation (PWM) is presented in this paper.
Agelidis, V.G., Xu, L.
core   +1 more source

Controlling Grain Growth in Powder Bed Fusion of Yttria‐Stabilized Zirconia Using Femtosecond Lasers: Challenges and Methodological Insights

Advanced Engineering Materials, EarlyView.
Binder‐free laser powder bed fusion of 8YSZ with a femtosecond laser is used to map process windows linking scan strategy, heat accumulation, and grain growth. Time‐resolved thermography and simulations reveal thermal regimes that enable continuous, vitrified, and fine‐grained 8YSZ surface layers without absorptive additives and demonstrate ...
Markus Kühn, Sarah Kaden, Andrea Barz, Daniel Störzner, Jens Bliedtner, Andrés Fabián Lasagni   +5 more
wiley   +1 more source

DC Bus Control of Back-to-Back Connected Two-Level PWM Rectifier-Five-Level NPC Voltage Source Inverter to Torque Ripple Reduction in Induction Motor

MATEC Web of Conferences, 2015
This paper proposes a regulation method of back-to-back connected two-level PWM rectifier-five-level Voltage Source Inverter (VSI) in order to reduce the torque ripple in induction motor.
Abdelkrim Thameur, Benamrane Karima, Bezza Badreddine   +2 more
doaj   +1 more source

Modeling, Analysis and Evaluation of Modified Model Predictive Control Method for Parallel Three-Level Simplified Neutral Point Clamped Inverters

IEEE Access, 2019
Parallel three-level simplified neutral point clamped inverters (3L-SNPCIs) are applied in this paper because of fewer switching devices, low harmonic, larger power capacity and more flexibility.
Fei Wang, Zhijun Li, Xiangrong Tong, Lei Chen   +3 more
doaj   +1 more source