Results 61 to 70 of about 2,077 (260)

Adaptive Balancing of Series-Connected SiC MOSFETs Based on Active Clamping and Comparison Circuitry

IEEE Access
This paper proposes a control method for balancing the voltages of series-connected SiC MOSFETs based on active clamping and comparison circuitry. Each SiC MOSFET is paired with an active clamping module (ACM), which comprises an auxiliary switch and a ...
Shuai Shao, Wentao Cui, Yibo Jiang, Xingyu Pei, Junming Zhang   +4 more
doaj   +1 more source

A New Topology of Modular Multilevel Converter With Voltage Self-Balancing Ability

IEEE Access, 2019
The modular multilevel converter (MMC) has been used in the field of HVDC transmission due to its many advantages, but its voltage imbalance problem of sub-module capacitors affects the stable operation of the system.
Hongchun Shu, Shunguang Lei, Xincui Tian
doaj   +1 more source

Effect of Optical Illumination on Bubble Nanodomains

Advanced Functional Materials, EarlyView.
Stable surface‐confined nanoscale bubble domains are created and manipulated in PMN‐PT single crystals. Under above‐bandgap illumination, these bubble nanodomains remain unchanged. However, upon illumination cessation, they rapidly expand to switch the entire crystal surface, due to the accumulation of a large reservoir of electrons at the crystal ...
Haoze Zhang, Anju Ahlawat, Richard F. Webster, Yunlong Sun, Dinesh Shukla, Danyang Wang, Jan Seidel, Alexei Gruverman, Pankaj Sharma   +8 more
wiley   +1 more source

Magnesium‐Based Transient Bioelectronics, Bio‐Optics and Bio‐Scaffolds

Advanced Functional Materials, EarlyView.
This paper reviews the state of the art and recent advances in magnesium‐based thin‐film, foils, and scaffolds for applications in transient bio‐optics, bioelectronics and tissue engineering. The design principles, fabrication methods, material properties, and integration strategies are discussed in detail.
Massimo Mariello, Yves Leterrier
wiley   +1 more source

Enhanced Power Quality in Grid-Connected Photovoltaic Systems Using a Novel Modular Multilevel Inverter Topology [PDF]

Journal of Renewable Energy and Environment
Grid-connected photovoltaic (PV) systems face persistent power quality challenges, primarily due to the complexity of maintaining capacitor voltage balance in advanced multilevel inverters.
Omar Al Basri, Fayrooz Nori, Mohammed Hussein   +2 more
doaj   +1 more source

Characteristics of Single-Phase Voltage-Doubler Rectifier with Balanced Capacitor Voltages

IEEJ Transactions on Industry Applications, 2001
A single-phase voltage-doubler rectifier, which has two auxiliary bidirectional switches, is studied. The proposed rectifier has the advantages that the imbalance of the voltages across the capacitors, connected in series, is minimized independent of the working conditions and the discharge of capacitors is adjusted by arranging two auxiliary ...
Kiyotake, Hirofumi, Okada, Hidehiko, Ishizaka, Kouichi, Itoh, Ryozo   +3 more
openaire   +2 more sources

Graphene Quantum Dot‐Induced Microstrain for Framework Stabilization of High‐Entropy Prussian Blue Analog in High‐Current Alkaline Hydrogen Evolution Reaction

Advanced Functional Materials, EarlyView.
The intrinsic distortion‐rich lattice of HEPBA with GQD‐enabled microstrain engineering establishes a mechanistic route toward high‐performance alkaline hydrogen evolution reaction. HEPBA inherently feature heterogeneous local coordination environments arising from multimetal incorporation, while properly introducing GQD during coprecipitation ...
Mia Rinawati, Yu‐Ru Liu, Wei‐Hsiang Huang, Kuan‐Yu Lin, Ching‐Ju Ho, Ling‐Yu Chang, Karel Roubik, Ni Luh Wulan Septiani, Ahmad Nuruddin, Wei‐Nien Su, Min‐Hsin Yeh   +10 more
wiley   +1 more source

Finite Control Set-Model Predictive Control (FCS-MPC) of a Modified 17-Level Flying-Capacitor Converter

Algorithms
This paper presents a Finite Control Set-Model Predictive Control (FCS-MPC) strategy for a modified single-phase 17-level Double Flying-Capacitor Multilevel (DFCM) converter.
Daniel Mejía, Héctor López, Leonel Estrada, Yann E. Bouvier, Joaquín Vaquero, Nimrod Vazquez, José Magaña   +6 more
doaj   +1 more source

Synergistic Solar Interfacial Evaporation and Photocatalysis Enabled by a Hierarchical Porous Hydrogel Reactor

Advanced Functional Materials, EarlyView.
A tree‐inspired hydrogel interfacial reactor couples solar evaporation with photocatalysis for simultaneous desalination and waste water treatment. The bilayer design achieves 2.14 kg·m−2·h−1 evaporation rate with 79% dye degradation under one sun, demonstrating that photothermal heating and evaporation induced pollutant enrichment create a self ...
Yan Zhao, Xiaolong Ma, Zihong Wu, Muhammad Amjad, Dongsheng Wen   +4 more
wiley   +1 more source

FCS-MPC for four-switch three-phase AC-DC converters with DC-link capacitor voltage balancing

Journal of Measurement Science and Instrumentation, 2019
Due to the decrease in the number of switches for the four-switch three-phase alternating current-direct current（FSTP AC-DC） converter, it can easily lead to DC-link capacitor voltage imbalance and the system stability reduction.
MA Wei-jie, ZHANG Bao-ge
doaj