Results 21 to 30 of about 2,961 (267)

A high‐frequency transformer‐based buck‐boost AC‐AC converter with high efficiency and wide range conversion ratio for DVR application

IET Power Electronics
This paper proposes an isolated single‐phase impedance‐source ac‐ac converter with a wide voltage conversion ratio and a safe commutation strategy.
Iman Abdoli, Hafiz Furqan Ahmed, Ali Mosallanejad   +2 more
doaj   +1 more source

Piezoresistive Monitoring of Carbon Nanomaterial‐Reinforced Epoxy Composites Under Cyclic and Fatigue Loading: A Review

Advanced Engineering Materials, EarlyView.
Carbon nanomaterial‐reinforced epoxy composites exhibit pronounced piezoresistive behavior, enabling intrinsic damage sensing under cyclic and fatigue loading. This review critically compares carbon nanotube and graphene systems, correlating filler content, percolation threshold, and gauge factor with sensing stability and damage evolution.
J. M. Parente, J. Nunes‐Pereira, A. P. Silva, P. N. B. Reis   +3 more
wiley   +1 more source

Active elimination of DC bias current of a SiC based dual active bridge by controlling the dead time period

IET Power Electronics
Dual active bridge (DAB) is an isolated DC‐DC converter gaining wider attention in power electronics applications. The high frequency (HF) transformer is an integral part of the DAB which is prone to saturation.
Ganesan Perumal, Kamalesh Hatua, Manju Rajagopal   +2 more
doaj   +1 more source

New cascaded multilevel inverter with series connection of novel capacitor based basic units

IET Power Electronics, 2023
This research proposes a novel multilevel inverter based on a new capacitor basic unit. Four capacitors are deployed in this unit to provide both even and odd voltage levels.
Sara Laali, Reza Nasiri‐Zarandi
doaj   +1 more source

Recent Stirling Conversion Technology Developments and Operational Measurements [PDF]

, 2009
Under contract to the Department of Energy (DOE), Lockheed Martin Space Systems Company (LMSSC) has been developing the Advanced Stirling Radioisotope Generator (ASRG).
Oriti, Salvatore, Schifer, Nicholas
core   +1 more source

A Topology Optimization Framework for the Inverse Design of Nonlinear Mechanical Metamaterials

Advanced Engineering Materials, EarlyView.
This work uses topology optimization to design unit cells for mechanical metamaterials with a prescribed nonlinear stress–strain response. The framework adds contact and postbuckling modeling to synthesize microstructures for three highly nonlinear responses, including pseudoductile behavior, monostable with snap‐through buckling, and bistable ...
Charlie Aveline, Matthew Santer, Robert Hewson   +2 more
wiley   +1 more source

Extended Operation of Stirling Convertors at NASA Glenn Research Center [PDF]

, 2011
Glenn Research Center (GRC) is supporting life and reliability database for free-piston Stirilng conversion via extended convertor operation Ongoing convertor operation: 18 convertors (4 TDCs from Infinia, 14 ASCs from Sunpower).
Oriti, Salvatore
core   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

System wide‐band oscillation analysis of fractional frequency offshore wind power systems

IET Generation, Transmission & Distribution
The fractional frequency offshore wind power system (FFOWPS) is a core technology for the long‐distance transmission and integration of the large‐scale offshore wind power.
Haitao Zhang, Jizhi Han, Zihao Sha, Fengting Wei, Xiuli Wang, Xifan Wang   +5 more
doaj   +1 more source

Single‐phase AC‐AC Z‐source converter based on asymmetrical gamma structure with continuous input current and safe commutation strategy

IET Power Electronics, 2021
This paper examines a new topology of the AC‐AC Z‐source converter based on asymmetric Gama structure is proposed. The proposed converter has all the common features such as common ground between input and output, realizing the continuous input current ...
Seyyed Mohammad Javad Mousavi, Ebrahim Babaei, Darioush Alizadeh, Hasan Komurcugil   +3 more
doaj   +1 more source