Results 21 to 30 of about 324,588 (293)

The Influence of Pantograph Arcing on the Current Collection of Electrified Trains Under Different Air Pressures

Applied Sciences
As well as the off-line phenomenon between the pantograph strip and the contact wire that occurs frequently, the current collection quality of trains is potential under threat.
Tong Xing, Qing Xiong, Like Pan, Qun Yu, Huan Zhang, Keqiao Zeng, Wenfu Wei   +6 more
doaj   +1 more source

Arc Voltage and Current Characteristics in Low-Voltage Direct Current

Energies, 2018
Recently, Low-Voltage DC (direct current) distribution systems have received high lights according to the expansion of DC generations and DC loads such as photovoltaics (PV) generations, electric vehicles (EVs), light emitting diodes (LEDs), computers ...
Wooho Kim, Yong-Jung Kim, Hyosung Kim
doaj   +1 more source

Simulation analysis of intermittent arc grounding fault applying with improved cybernetic arc model

The Journal of Engineering, 2019
Intermittent arc grounding fault frequently occurs in non-solidly earthed networks. Establishing an accurate arc model is the basis for analysis of fault characteristics.
Shurong Li, Yongduan Xue, Guang Feng, Bingyin Xu   +3 more
doaj   +1 more source

Experimental investigations on the post-arc current of the vacuum circuit breaker in an active mechanical DC circuit breaker

AIP Advances, 2021
Vacuum circuit breakers (VCB) are commonly used in active mechanical direct current circuit breakers (DC CBs) to accomplish the interruption of the fault current.
Shenli Jia, Qiang Tang, Zongqian Shi, Yongpeng Mo   +3 more
doaj   +1 more source

Simulation of Pantograph–Catenary Arc Temperature Field in Urban Railway and Study of Influencing Factors on Arc Temperature

Infrastructures
During the running of urban railway trains, arcs of the pantograph–catenary (PC) system cause instantaneous high-temperature ablation of PC system materials, which severely impact the standard running of trains.
Xiaoying Yu, Yang Su, Mengjie Song, Junrui Yang, Liying Song, Ze Wang, Yixiao Liu, Caizhuo Wei, Yongjia Cheng   +8 more
doaj   +1 more source

Lightning protection of multi‐fracture arc‐quenching lightning protection gap for 35 kV distribution lines

IET Generation, Transmission & Distribution, 2021
Owing to the low insulation level of 35 kV distribution lines, lightning outage accidents and huge economic losses occur frequently. Therefore, a multi‐fracture arc‐quenching lightning protection gap (MFALPG) for 35 kV distribution lines is developed to ...
Dong Wu, Ju‐feng Wang
doaj   +1 more source

Orbits in a generalized two-body problem [PDF]

, 2003
The two-body problem is a well-known case of the general central force problem with an attractive, inverse square force. However, there are forms of spacecraft propulsion, such as solar sails and minimagnetospheric plasmapropulsion, which generate a ...
McInnes, C.R.
core   +1 more source

Analysis of the Processes in the Welding Arc during Additive Manufacturing [PDF]

Archives of Metallurgy and Materials
Experimental studies of arc burning have been carried out with a view to use it for wire arc additive manufacturing processes. The values of the welding arc current and voltage were recorded and the records were analyzed.
V. Petkov, P. Tashev, V. Dyakova
doaj   +1 more source

Vacuum arc transient behaviors and voltage characteristics in low-current DC interruption under rotating TMF

AIP Advances, 2020
The objective of this work is to determine the relationship between the vacuum arc transient behaviors and voltage characteristics in low-current DC interruption under a rotating transverse magnetic field (TMF).
Hui Ma, Jingyi Wang, Shaowei Liu, Feiliang Hu, Zhiyuan Liu, Yingsan Geng, Jianhua Wang   +6 more
doaj   +1 more source

Breathing-Adapted Imaging Techniques for Rapid 4-Dimensional Lung Tomosynthesis

Advances in Radiation Oncology, 2023
Purpose: This article presents enhancements to a 4-dimensional (4D) lung digital tomosynthesis (DTS) model introduced in a 2018 paper. That model was proposed as an adjunct to 4D computed tomography (4DCT) to improve tumor localization through artifact ...
Arielle A. Uejo, MS, Michael G. Snyder, PhD, Joseph T. Rakowski, PhD   +2 more
doaj   +1 more source