Results 31 to 40 of about 3,017 (267)

Electrode and Microstructure Dependence of Oxygen Diffusion in Ferroelectric Hafnium Zirconium Oxide Thin Films

Advanced Functional Materials, EarlyView.
Significant nanoscale oxygen diffusion coefficient variations are measured in ferroelectric hafnium zirconium oxide films with grain boundaries and electrode interfaces exhibiting values 104 times larger than the grain cores. Overall coefficients are 10X larger for films prepared with metal nitride electrodes compared to refractory metals. New insights
Liron Shvilberg, Thomas W. Pfeifer, Chuanzhen Zhou, Yong Kyu Choi, Duk‐Hyun Choe, Patrick E. Hopkins, Jon F. Ihlefeld   +6 more
wiley   +1 more source

Centralized DC voltage control for a Multiport converter in distribution grids

International Journal of Electrical Power & Energy Systems
Power electronics components are becoming essential for smart grids, especially integrating systems such as renewable energies, storage or electric vehicles.
Martí Domínguez-Hernàndez, Marc Cheah-Mañé, Robert Griñó, Oriol Gomis-Bellmunt   +3 more
doaj   +1 more source

Passive Fault-Tolerant Control Strategies for Power Converter in a Hybrid Microgrid

Energies, 2020
Control of AC/DC pulse-width modulation (PWM) power electronic converter, referred to as “AC/DC PWM converter”, is vital to the efficient regulation of power flow between AC and DC parts of a hybrid microgrid.
Saeedreza Jadidi, Hamed Badihi, Youmin Zhang   +2 more
doaj   +1 more source

Efficient simulation of DC‐AC power converters using multirate partial differential equations [PDF]

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2019
AbstractSwitch‐mode power converters are used in various applications to convert between different voltage (or current) levels. They use transistors to switch on and off the input voltage to generate a pulsed voltage whose arithmetic average is the desired output voltage of the converter.
Andreas Pels, Ruth V. Sabariego, Sebastian Schöps   +2 more
openaire   +2 more sources

Development of a Three‐Axis Planar Hall Magnetoresistance Sensor Using a Superparamagnetic Nanoparticle‐Based Flux Guide

Advanced Functional Materials, EarlyView.
A printed superparamagnetic nanoparticle‐based flux guide enables the realization of a hysteresis‐free three‐axis magnetic sensor. This innovative architecture efficiently redirects out‐of‐plane fields to planar sensing elements, facilitating simultaneous vector detection without complex reset protocols.
Changyeop Jeon, Mijin Kim, Keonmok Kim, Byeonghwa Lim, Bibhutibhusan Nayak, Youngdo Jung, Bo‐Yeon Lee, Taehyeong Jeon, Jinwoo Kim, Sunjong Oh, CheolGi Kim   +10 more
wiley   +1 more source

Evaluation of Feasible Interlinking Converters in a Bipolar Hybrid Microgrid

Journal of Modern Power Systems and Clean Energy, 2020
A bipolar hybrid microgrid is a new topology which benefits from the advantages of both alternating current (AC) and direct current (DC) microgrids. Interlinking AC/DC converter is the key of this topology which has the following characteristics: being ...
Parviz Najafi, Abbas Houshmand Viki, Mahdi Shahparasti   +2 more
doaj   +1 more source

Current stress and switching loss evaluation of a unified expandable power converter used for grid‐integration of renewable energy sources

IET Renewable Power Generation, 2021
Due to the intermittent nature of the renewable energy systems (RESs), more specifically, solar panels and wind turbines, their sole use does not lead to a smooth and reliable power. To overcome this issue, the concurrent grid‐integration of RESs to form
Hamed Bizhani, S. M. Muyeen, Fatemeh R. Tatari, Kuaanan Techato, Lazhar Ben‐Brahim, Frede Blaabjerg   +5 more
doaj   +1 more source

Integration of Voltage Source Converters in Steady-State RMS Short-Circuit Analysis

Energies, 2021
Voltage source converters (VSCs) are self-commutated converters able to generate AC voltages with or without the support of an AC connecting grid. VSCs allow fast control of active and reactive powers in an independent way.
Carlos Coelho Teixeira, Helder Leite
doaj   +1 more source

Ultrawide Bandwidth Optomechanical Magnetometry Using Flux Concentration

Advanced Functional Materials, EarlyView.
High‐permeability flux concentrators enable ultrawide‐bandwidth chip‐scale optomechanical magnetometry by exploiting magnetic nonlinearity to up‐convert low‐frequency fields to the mechanical resonance, where sensitivity is optimal. This enables flat wideband operation over more than four orders of magnitude, from tens of kilohertz to sub‐hertz ...
Benjamin J. Carey, Nathaniel Bawden, Fernando Gottardo, James S. Bennett, Douglas Bulla, Scott Foster, Warwick P. Bowen   +6 more
wiley   +1 more source

Design of an inductor-less step-up ac/dc converter for 0.3 V@1 MHz vibration energy harvesting

Energy Reports, 2020
For vibration energy harvesting, we propose an inductor-less step-up ac/dc converter in this paper. To realize the inductor-less design, the proposed ac/dc converter consists of two converter blocks: Cockcroft–Walton circuit and charge pump.
Kei Eguchi, Akira Shibata, Kyoka Kuwahara, Takaaki Ishibashi   +3 more
doaj   +1 more source