Results 91 to 100 of about 431,967 (309)

Scalable Thermal Engineering via Femtosecond Laser‐Direct‐Written Phononic Nanostructures

Advanced Functional Materials, EarlyView.
This study demonstrates that femtosecond laser‐induced periodic surface structures (fs‐LIPSS) can function as phononic metasurfaces, reducing thermal conductivity below the plain thin‐film limit. Phonon Monte Carlo analysis reveals that the periodic structures restrict phonon mean free paths.
Hiroki Hamma, Roman Anufriev, Kazuyoshi Fushinobu, Masahiro Nomura, Byunggi Kim   +4 more
wiley   +1 more source

Laser‐Welded Cellulose‐Carbon Nanotube Nanocomposites as a 3D Scaffold of Si Anodes for High‐Performance Lithium‐Ion Batteries

Advanced Functional Materials, EarlyView.
A Si anode comprising entangled networks of cellulose and SWCNT (C‐CNT) nanocomposites as an anode electrode for a high‐performance LIB is realized by fully utilizing the generated microstructure of a novel conductive 3D scaffold via a low‐temperature and eco‐friendly process. Additionally, localized heating via photo‐thermal conversion can be utilized
Boeun Ryu, Younghoon Jung, Hojin Son, Min‐Young Kim, Jinsub Lim, Changhun Yun   +5 more
wiley   +1 more source

Improved Short-Circuit Protection for Power Cells in Series [PDF]

A scheme for protection against short circuits has been devised for series strings of lithium electrochemical cells that contain built-in short-circuit protection devices, which go into a high-resistance, current-limiting state when heated by excessive ...
Davies, Francis
core   +1 more source

Transient Effects at Power-Supply System of the Czech Railways from EMC Viewpoint [PDF]

, 2007
The paper deals with the behavior of the traction power-supply system 25 kV, 50 Hz at the Czech Railways. Electrical conditions on a contact line affect electrical conditions in a feeding station.
Dolecek, R., Hlava, K.
core   +1 more source

Experimental Test bed to De-Risk the Navy Advanced Development Model [PDF]

, 2017
This paper presents a reduced scale demonstration test-bed at the University of Texas’ Center for Electromechanics (UT-CEM) which is well equipped to support the development and assessment of the anticipated Navy Advanced Development Model (ADM).
Feng, X, Gattozzi, A, Hebner, R., Herbst, J, Pish, S, Strank, S, Wardell, D   +6 more
core   +1 more source

Domain Wall Rebounds Driven by Competing Entropic and Spin‐Transfer Torques in Cylindrical Nanowires

Advanced Functional Materials, EarlyView.
Domain‐wall motion in cylindrical magnetic nanowires driven by nanosecond current pulses. Low current densities efficiently displace domain walls, whereas higher currents cause rebound at the wire ends. The effect results from the interplay between spin‐transfer torque and thermally induced processes, highlighting the role of thermal gradients in ...
Elias Saugar, Jorge Marqués‐Marchán, Sara Catalano, Agustina Asenjo, Michael Foerster, Miguel Angel Niño, Manuel Vazquez, Fèlix Casanova, Arantxa Fraile Rodríguez, Rafael P. Del Real, Oksana Chubykalo‐Fesenko, Cristina Bran   +11 more
wiley   +1 more source

A magnetic isolation IGBT driver architecture with short circuit protection

Dianzi Jishu Yingyong
A magnetic isolation IGBT drive architecture with short circuit protection is designed in this paper. The architecture adopts transformer isolation, integrates desaturation detection circuit, Miller clamp circuit and soft turn-off.
Liu Jiajun, Li Fei, Chen Rongxin, Deng Yuqing, Xiao Peilei   +4 more
doaj   +1 more source

Planeringsarbete för byte av skyddsrelä [PDF]

, 2011
Gamla reläskydd kan plötsligt sluta fungera. Därför är Kojola elstation i behov av nya. Elnätet har växt sedan de gamla reläskydden planerades och det betyder att inställningarna behöver uppdateras, men först måste de gamla reläskyddens inställningar och
Kanckos, Simon
core  

Localized High‐Concentration Electrolyte with Water‐Miscible Diluent Enables Stable Zinc Deposition and Long‐Life Aqueous Zinc Metal Batteries

Advanced Functional Materials, EarlyView.
A diisopropyl ether (DIPE)‐based, localized, high‐concentration electrolyte is developed to stabilize both electrodes in aqueous zinc batteries. By reducing water activity and promoting anion‐rich zinc‐ion solvation, it builds robust interphases at both the cathode and anode, ensuring uniform deposition, suppressed corrosion, and highly reversible ...
Yuxuan Wu, Ziwei Zhao, Yue Fei, Hao Zhang, Ge Li   +4 more
wiley   +1 more source

Design and Application of Drive and Protection Circuit of 6 500 V IGBT Based on 1SC0450V

机车电传动, 2017
The drive characteristics of 1SC0450V was introduced in detail, and the implementation principle of drive supply circuit, supply under-voltage protection, advanced active clamp and short-circuit protection were analyzed. 6 500 V IGBT drive and protection
WANG Lei, YANG Lu, LI Shourong, GAO Sheng   +3 more
doaj