Results 121 to 130 of about 21,219 (327)

A Novel Railgun-Based Actuation System for Ultrafast DC Circuit Breakers in EV Fast-Charging Applications

World Electric Vehicle Journal
This paper presents a novel ultrafast DC circuit breaker concept based on a railgun actuator, designed for ultrafast charging stations operating at 800 V and delivering up to 640 kW. The proposed breaker achieves contact opening speeds exceeding 190 m/s,
Fermín Gómez de León, Ara Bissal, Maurizio Repetto, Fabio Freschi   +3 more
doaj   +1 more source

Gecko‐Like Multi‐Directional High‐Power Magneto–Mechano–Electric Energy Harvesters for Self‐Powered, Hundred‐Meter‐Scale LoRa Communication

Advanced Science, EarlyView.
Gecko like multi directional high power magneto mechano electric energy harvester (MME EH) for self powered, hundred meter scale LoRa communication. Inspired by the symmetric and flexible limb motion of geckos, the biomimetic harvester enables coordinated bending twisting responses to weak, low frequency (50/60 Hz) stray magnetic fields from power ...
Shitong Fang, Haoxian Peng, Mingjing Cai, Liuchao Jin, Yuelong Yu, Mianxin Xiao, Qingyang Xu, Jiacheng Hou, Degui Yu, Zhihui Lai, Xin Li, Shuxiang Dong, Biao Wang, Wei‐Hsin Liao   +13 more
wiley   +1 more source

Tracing the Dynamic Chemical Transformations of Spiro‐OMeTAD in Operating Perovskite Solar Cells

Advanced Science, EarlyView.
Mapping of Spiro‐OMeTAD layer's chemistry and electronic properties in PSC: Advanced cluster ion‐beam sputtering depth profile XPS reveals that environmental stressors (light, potential, and moisture) trigger the decomposition of LiTFSI dopants in Spiro‐OMeTAD.
Chittaranjan Das, Mayank Kedia, Kenedy Tabah Tanko, Yunshan Wang, Christian Njel, Monica Lira‐Cantu, Michael Saliba   +6 more
wiley   +1 more source

Failure modes and remedies of a solid-state low voltage DC circuit breaker through 3,000,000＋ operation cycles

Power Electronic Devices and Components
This paper reports and analyzes the failure modes of a 1.2 kV low voltage (LV) solid-state dc circuit breaker (DCCB) over 3,000,000＋ opening operations.
Yang Liu, Kayla Chuong, Zhi Jin Zhang, Lauren M. Garten, Lukas Graber   +4 more
doaj   +1 more source

Apollo experience report: Command and service module controls and displays subsystem [PDF]

A review of the command and service module controls and displays subsystem is presented. The subsystem is described, and operational requirements, component history, problems and solutions, and conclusions and recommendations for the subsystem are ...
Olsen, A. B., Swint, R. J.
core   +1 more source

Energy Extraction in the CERN Large Hadron Collider: a Project Overview [PDF]

, 2001
In case of a resistive transition (quench), fast and reliable extraction of the magnetic energy, stored in the superconducting coils of the electromagnets of a particle collider, represents an important part of its magnet protection system.
Dahlerup-Petersen, K, Erokhin, A, Kazmine, B, Medvedko, A S, Sytchev, V V, Vasilev, L B   +5 more
core  

Ultrafast, High‐Capacity Uranium Harvesting From Seawater via a Hierarchically Porous Polymer Electrode

Advanced Science, EarlyView.
A hierarchically porous AOPIM‐CNT electrode enables uranium harvesting from seawater via adsorption‐promoted electrodeposition. Rapid diffusion and selective adsorption are coupled with electrochemical crystallization and spontaneous detachment, creating a self‐refreshing process that sustains high‐capacity, continuous extraction from ultradilute ...
Zejun Song, Zhenggong Wang, Lele Guo, Zhining Wang, Keming Wan, Ting Zhang, Wangxi Fang, Jian Jin   +7 more
wiley   +1 more source

Finite element joint simulation model applied to fast mechanical switching of controlled resonance combination circuit breakers

High Voltage
Fast mechanical switches (FMSs) are critical components of DC circuit breakers (DCCBs), which require the switch action time to break to a sufficient distance within 3 ms in the DC line breaking scenario, while ensuring a long service life.
Puyi Cui, Guoli Li, Zehui Sun, Jiazi Xu, Guoyong Zhang, Zhong Chen, Weiping Guan   +6 more
doaj   +1 more source

Research on Segmented Duty Cycle Control Strategy of Motor Operating Mechanism of High Voltage Circuit Breaker

IEEE Access
In order to improve the breaking performance of high-voltage circuit breakers and effectively suppress the bounce and mechanical impact caused by contact collision during closing, this study proposes a PWM control strategy based on segmented duty cycle ...
Dongpeng Han, Hebin Wang, Lei Huang, Feng Zuo   +3 more
doaj   +1 more source

Self-healing fuse development [PDF]

The mercury-filled self-healing fuses developed for this program afford very good protection from circuit faults with rapid reclosure. Fuse performance and design parameters have been characterized. Life tests indicate a capability of 500 fuse operations.
Harris, L. P., Jones, N. D., Kinsinger, R. E.   +2 more
core   +1 more source