Results 31 to 40 of about 16,176 (259)

Quasi-switched inverter using space vector pulse width modulation with triangular comparison for photovoltaic applications

TecnoLógicas, 2018
This work analyzes a prototype of a quasi-switched boost inverter (qSBI) feeding an isolated resistive load from a DC source. The use of spatial vector pulse width modulation (SPWM) with triangular comparison is proposed to increase the qSBI gain factor,
Iván F. Moran, José A. Restrepo , Martha L. Orozco-Gutierrez , José M. Ramirez-Scarpetta   +3 more
doaj   +1 more source

Constraint Harmonic Compensation Strategy for Extending Power Routing Capability in CHB Converter

IEEE Access
Power routing or uneven power distribution in modular systems based on a cascaded H-bridge (CHB) converter is sometimes desired or even required, such as in hybrid battery energy storage applications. For series-connected cells, such as in CHB, the power
Anas Ibrahim, Mohamed Salem, Damin Zhang, Khalid Yahya, Saleh Al Dawsari   +4 more
doaj   +1 more source

Discontinuous modulation of modular multilevel converters without the need for extra submodules [PDF]

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society, 2015
In this paper, a new approach to the discontinuous modulation technique for the operation of the modular multilevel converter (MMC) is presented. Discontinuous modulation is based on adding a zero-sequence to the original modulation signals so that each MMC arm is clamped to the upper or lower terminals of the dc-link bus during some intervals.
Ricard Picas, Salvador Ceballos, Josep Pou, Jordi Zaragoza, Georgios Konstantinou, Vassilios G. Agelidis, Josep Balcells   +6 more
openaire   +2 more sources

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

Advanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal, Cevher Kursat Macit, Merve Ayık, Hakan Tutumlu   +3 more
wiley   +1 more source

Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids

Advanced Functional Materials, EarlyView.
This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow, Samya Sen, Joaquin Yus, Eliza E. Lovrich, Amanda G. Hoika, Kelly M. Chang, Arielle A. Pfeil, Nellie Haug, Amy J. Wagoner Johnson, Randy H. Ewoldt   +9 more
wiley   +1 more source

Discontinuous PWM Techniques of Three-Leg Two-Phase Voltage Source Inverter for Sonar System

IEEE Access, 2020
Pulse width modulation (PWM) methods are important for the detection performance of a sound navigation and ranging (sonar) system because they determine the output noise of the system.
Jaehyuk Choi, Dong-Hun Lee, Hyungsoo Mok
doaj   +1 more source

A discontinuous autoinhibitory module masks the A1 domain of von Willebrand factor [PDF]

Journal of Thrombosis and Haemostasis, 2017
Essentials The mechanism for the auto-inhibition of von Willebrand factor (VWF) remains unclear. Hydrogen exchange of two VWF A1 fragments with disparate activities was measured and compared. Discontinuous residues flanking A1 form a structural module that blocks A1 binding to the platelet.
W. Deng, Y. Wang, S.A. Druzak, J.F. Healey, A.K. Syed, P. Lollar, R. Li   +6 more
openaire   +2 more sources

Control of Polarization and Polar Helicity in BiFeO3 by Epitaxial Strain and Interfacial Chemistry

Advanced Functional Materials, EarlyView.
In BiFeO3 thin films, the interplay of interfacial chemistry, electrostatics, and epitaxial strain is engineered to stabilize homohelicity in polarization textures at the domain scale. The synergistic use of a Bi2O2‐terminated Aurivillius buffer layer and a highly anisotropic compressive epitaxial strain offers new routes to control the polar‐texture ...
Elzbieta Gradauskaite, Lilia Huynh, Natascha Gray, Quintin N. Meier, Marta D. Rossell, Morgan Trassin   +5 more
wiley   +1 more source

Strain‐Programmable Luminescent Adhesive Patch With Tartrazine‐Mediated Optical Skin Clearing for Photochemical Tissue Bonding

Advanced Functional Materials, EarlyView.
We propose a suture‐complementary approach that integrates optical skin clearing with a strain‐programmable luminescent adhesive patch. Hyaluronic acid promotes transdermal delivery of tartrazine to improve optical clearing and stabilizes its interaction with a photosensitizer. Optical clearing increases the penetration depth of visible light into skin,
Seong‐Jong Kim, Kyungjoo Jo, Kwanghyeon Park, Jun Hee Kim, Jong Hyeong Cho, Inhoo Choi, Sei Kwang Hahn   +6 more
wiley   +1 more source

Discontinuous PWM strategy considering neutral-point potential balance for a three-level NPC inverter

工程科学学报, 2016
A novel discontinuous space-vector pulse width modulation(DSVPWM) strategy is proposed for a three-level neutralpoint-clamped(NPC) voltage source inverter.
LUO Xiao-fei, SUN Yan-guang, SONG Ke-jian, SHI Zhi-xue   +3 more
doaj   +1 more source