Results 41 to 50 of about 1,555 (283)

High current interruption in vacuum circuit breakers [PDF]

Proceedings of 17th International Symposium on Discharges and Electrical Insulation in Vacuum, 1997
The aim of this project was to find a correlation between contact gap length and switching behavior of a vacuum circuit breaker. A large number of interruption experiments were executed in a vacuum chamber with butt type contacts made of Cu, CuCr 50/50 and AgWC. The currents to be interrupted varied from 2.5 to 32 kA.
Binnendijk, M., Merck, W.F.H., Smeets, R.P.P., Watanabe, K., Kaneko, E.   +4 more
openaire   +2 more sources

Understanding Decoherence of the Boron Vacancy Center in Hexagonal Boron Nitride

Advanced Functional Materials, EarlyView.
State‐of‐the‐art computations unravel the intricate decoherence dynamics of the boron vacancy center in hexagonal boron nitride across magnetic fields from 0 to 3 T. Five distinct regimes emerge, dominated by nuclear spin interactions, revealing optimal coherence times of 1–20 µs in the 180–350 mT range for isotopically pure samples.
András Tárkányi, Viktor Ivády
wiley   +1 more source

Anode thermal process in high current vacuum arc under low frequency AC discharge condition

AIP Advances
Low frequency AC transmission systems exhibit extensive application prospects in scenarios such as long distance offshore wind power transmission and have garnered significant attention in developing eco-friendly power systems. Compared with conventional
Zaiqin Zhang, Xinting Guo, Chuang Wang, Qingqing Gao, Chi Chen   +4 more
doaj   +1 more source

The impact of capacitor bank inrush current on field emission current in vacuum [PDF]

, 2010
Field emission current measurements during the recovery voltage are investigated to understand the origin of restrikes in vacuum interrupters in case of the interruption of capacitive loads. Measurement and analysis of very small field emission currents (
Hinrichsen, V., Koochack-Zadeh, M., Lawall, A., Smeets, R.P.P.   +3 more
core   +1 more source

Electroactive Liquid Crystal Elastomers as Soft Actuators

Advanced Functional Materials, EarlyView.
Electroactive liquid crystal elastomers (eLCEs) can be actuated via electromechanical, electrochemical, or electrothermal effects. a) Electromechanical effects include Maxwell stress, electrostriction, and the electroclinic effect. b) Electrochemical effects arise from electrode redox reactions.
Yakui Deng, Min‐Hui Li
wiley   +1 more source

Numerical Analysis, Experimental Validation, and Application of DC Interruption With Parallel Vacuum Interrupters

International Transactions on Electrical Energy Systems
Large-capacity high voltage direct current circuit breakers (HVDC CBs) are critical equipment for achieving reliable operation of future multiterminal HVDC systems.
Siyuan Liu, Yifan Chen, Jinchao Chen, Mengze Yu, Zhiyuan Liu, Yingsan Geng   +5 more
doaj   +1 more source

Direct-Current Forced Interruption and Breaking Performance of Spiral-Type Contacts in Aero Applications

Applied Sciences, 2017
This paper analyses the transient characteristics and breaking performance of direct-current (DC) forced-interruption vacuum interrupters in 270 V power-supply systems.
Wenlei Huo, Jianwen Wu, Bowen Jia, Mingxuan Chen, Suliang Ma, Liying Zhu   +5 more
doaj   +1 more source

Adaptive 4D‐Printed Vascular Stents With Low‐Temperature‐Activated and Intelligent Deployment

Advanced Functional Materials, EarlyView.
Microarchitected coronary artery stents were fabricated using a polycaprolactone (PCL)‐based shape memory polymer (SMP) composite via projection micro‐stereolithography (PµSL) 4D printing. By incorporating diethyl phthalate (DEP) as a plasticizer, the thermal transition temperature (Ttran) was modulated to about 37°C, enabling rapid and autonomous ...
Yannan Li, Yifan Pan, Chikahiro Imashiro, Chaolun Xu, Jianxian He, Jingao Xu, Kewei Song, Ze Zhang, Chen Gao, Junbo Jiang, Runhuai Yang, Kayo Hirose, Shinjiro Umezu   +12 more
wiley   +1 more source

Discharge characteristics of composite insulation system with floating electrode and solid insulator in vacuum [PDF]

, 2016
For the development of vacuum interrupters for their higher voltage application in power transmission systems, it is necessary to clarify the discharge characteristics of composite insulation systems with a shield (floating electrode) and a solid ...
66963, 66964, 66965, 66966, 66967, 66968, Hayakawa, Naoki, Kimura, Toshinori, Kojima, Hiroki, Kong, Fei, Nakano, Yusuke, Tsukima, Mitsuru   +11 more
core   +1 more source

Impact of Lattice Heterogeneity on Broadband Optical Retardation in Stacked 2D Perovskite Single Crystals

Advanced Functional Materials, EarlyView.
It is shown that interfaces between organic and inorganic layers govern long‐range stacking disorder and in‐plane anisotropy in 2D metal‐halide perovskites. By comparing single‐cation AB‐AB and ordered mixed‐cation ABCD‐ABCD stackings, SCXRD reveals enhanced mosaicity, while optics confirm high birefringence.
Yixuan Dou, Nicholas Nici, Sunhao Liu, Xiaoming Wang, Yanfa Yan, Carla Slebodnick, Lina Quan   +6 more
wiley   +1 more source