Results 31 to 40 of about 9,411 (265)

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

Advanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund, Arthur Schulz, Peter Lunkenheimer, Maryana Kraft, Thomas Bergler, Harald Oberhofer, Dirk Volkmer   +6 more
wiley   +1 more source

A novel triangular wave quadrature oscillator without passive components for sinusoidal pulse width modulation DC-AC power conversion

International Journal of Electrical and Computer Engineering, 2023
In this study, a low-cost quadrature triangle oscillator using a voltage-controlled closed-loop dual operational amplifier (Op-Amp) architecture is proposed. Unlike other typical designs, this oscillator does not require any passive components. The use of an Op-Amp-based circuit is attractive for a triangle oscillator because it is more cost-effective ...
Garinto, Dodi, Valerie, Theodora, Yanto, Harki Apri, Sutikno, Tole, Simatupang, Joni Welman   +5 more
openaire   +4 more sources

Unified Iterative Algorithm for Power Flow of AC/DC System with Multi-Type DC Links

CSEE Journal of Power and Energy Systems
As an emerging trend in power grid development, the AC/DC hybrid power grid presents the characteristics of multi-type DC links and large-scale AC/DC interconnection.
Zhiqiang Song, Yaohui Huang, Jianzhong Xu, Chengyong Zhao, Xiufang Jia, Huashi Zhao   +5 more
doaj   +1 more source

Tuning the Dielectric Properties of Individual Clay Nanosheets by Interlayer Composition: Toward Nano‐Electret Materials

Advanced Functional Materials, EarlyView.
The dielectric properties of clays are studied on the level of individual monolayers and functional double stacks. The material breakdown characteristics and charge storage performance are analyzed. For illustration, a defined charge pattern representing a cuneiform character is produced, written into a microscopic clay tile, referencing the origins of
Sebastian Gödrich, Paul Markus, Matthias Stöter, Bernhard Biersack, Rainer Schobert, Josef Breu, Georg Papastavrou   +6 more
wiley   +1 more source

AC-DC Cuk Converter: A State-of-the-Art topological review

Energy Conversion and Management: X
AC-DC converters, which transform alternating current (AC) into controlled direct current (DC), are key instruments for systems requiring stable and efficient power conversion.
Istiak Ahmed, Asif Imties Alvy, Irfan Rahman, Md. Abdullah Al Hossain, Showrov Rahman, Abdullah Al-Hysam, Abdur Razzak   +6 more
doaj   +1 more source

Controllable AC/DC Integration for Power Quality Improvement in Microgrids

Advances in Electrical and Computer Engineering, 2019
Renewable energy sources can be connected to utility grids by using AC and DC integration methods. The AC integration is a practical and cost-effective method thanks to its simple structure; however, its power quality protection is weak.
KARABIBER, A.
doaj   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

Power Decoupling Control for V2G/G2V/PV2G Operation Modes in Single-Phase PV/Battery Hybrid Energy System With Low DC-Link Capacitance

IEEE Access, 2021
Three-port intelligent conversion systems, interfacing photovoltaic (PV) arrays and electric vehicles (EVs), with an electrical grid, are a promising flexible infrastructure for future smart grids.
Zhigang Zhang, Bin Liu, Shaojian Song
doaj   +1 more source

Consideration of Electric Power Conversion Efficiency Improvement of Magnetic Oscillation Type DC-AC Converter

Journal of the Magnetics Society of Japan, 2009
In a previous paper, we proposed a magnetic oscillation type dc-ac converter with sinusoidal output. An ac-voltage source is connected to an excitation winding of the magnetic circuit in series. The converter can supply electric power to the ac-voltage source because the current flowing through the ac-voltage source can be controlled by small signal ...
Y. Ogata, S. Okanuma
openaire   +2 more sources

Slight Truncation Changes in Iron Oxide Nanocubes Strongly Affect Their Magnetic Properties

Advanced Functional Materials, EarlyView.
Subtle variations in nanoparticle morphology can lead to significant changes in functional properties. An automated shape‐fitting method captures minor differences in corner truncation between iron oxide nanocubes of similar sizes synthesized under identical conditions, revealing pronounced disparities in their magnetic and hyperthermia behavior ...
Kingsley Poon, Raúl López‐Martín, Verner Håkonsen, Nader Yaacoub, Francisco J. Terán, Alberto López Ortega, Jose A. De Toro, Gurvinder Singh   +7 more
wiley   +1 more source