Results 31 to 40 of about 583,507 (329)

The Simulation of Surface Charge Accumulation on PMMA with Different Surface Roughness in Vacuum

Energy and Power Engineering, 2017
The surface insulation properties of insulating material under DC voltage are closely related to the characteristics of surface charge accumulation, and the surface roughness of these materials has a direct impact on the surface charge distribution in vacuum. Therefore, it is significant to study their connection.
Jiyuan Yan, Jie Ren, Qing Xie, Haofan Lin, Zhiliang Hu, Huijuan Ran, Weitao Hu, Si Li   +7 more
openaire   +1 more source

Decay of Electric Charge on Corona Charged Polyethylene

, 2007
In this paper, the surface potential decay of corona-charged low density polyethylene (LDPE) films has been investigated. It has been found that for the same sample thickness the faster decay occurs in the sample with a higher charging voltage.
Zhiqiang Xu, Xu, Z, Zhang, L, G Chen, XU, Zhiqiang, Chen, G, Zhang, Linwen, Linwen Zhang, Chen, George   +8 more
core   +1 more source

Correlation of traps inside XLPE and polypropylene with space charge dynamics under polarity reversal condition

IET Science, Measurement & Technology, 2021
Polypropylene (PP) is being considered as a suitable alternative to the cross‐linked polyethylene (XLPE) insulation as the latter is prone to the space charge accumulation when subjected to the voltage polarity reversals in line‐commutated converter high
Ashish Paramane, Xiangrong Chen, Chao Dai, Yasuhiro Tanaka   +3 more
doaj   +1 more source

Surface states and charge accumulation states on reconstructed InAs(001) surfaces

Surface Science, 2015
Abstract Using angle-resolved photoelectron spectroscopy, we investigate the electronic structure of InAs(001) surfaces having different stoichiometries, i.e. the indium rich c(8 × 2) / 4 × 2 surface and the arsenic-rich c(2 × 8) / 2 × 4 surface. We also compare surfaces having the same reconstructions but prepared by different techniques; by ion ...
Tomaszewska, Natalia, Lis, Jakub, Kołodziej, Jacek, Walczak, Łukasz   +3 more
openaire   +2 more sources

FEM Simulation of Charge Accumulation Behaviours on Polyimide Surface in 10 kV Negative High-Voltage Corona Polarization Process

IEEE Access, 2020
The study investigates behaviors of charge accumulation on an insulated surface from micro perspective via the numerical method. A coupling bridge between the micro-ion reaction system and the macroscopic multi-physical field was constructed by means of ...
Tao Feng, Wei He, Jin Gang Wang
doaj   +1 more source

Space charge dynamics in low density polyethylene under dc electric fields

, 2007
In this paper space charge dynamics in low-density polyethylene (LDPE) under different dc electric fields, ranging from 25 kV/mm to 125 kV/mm, have been investigated using the pulsed electroacoustic (PEA) technique. Bipolar space charges have been formed
Xu, Zhiqiang, Chen, George
core   +1 more source

Characteristics of Surface Charge Accumulation on Direct Current GIL Insulators Under Different Dominant Mechanisms Considering Surface Trapping Effect

Shanghai Jiaotong Daxue xuebao
The existing mathematical models for charge accumulation at the gas-solid interface can hardly illustrate some microscopic mechanisms, which need improvement.
WANG Yaogang, WANG Zheming, LI Ke, JIA Bowen, YANG Hua, YAN Wu, LU Wu
doaj   +1 more source

Charge transport and accumulation around the cone-type insulator in SF(6)-filled 550 kV DC GIL

The Journal of Engineering, 2019
The gas-insulated transmission line (GIL) has the advantages of large transmission capacity, high operation reliability and environmental friendliness. It is suitable for the high voltage direct current (HVDC) power transmission of hydropower stations or
Bo Zhang, Yujing Guo, Yongqi Yao, Zhijun Wang, Hao Zhang, Guangyao Jin   +5 more
doaj   +1 more source

Effect of Temperature on Space Charge Distribution in Two Layers of Transformer Oil and Impregnated Pressboard Under DC Voltage

IEEE Access, 2020
The space charge accumulation is an important factor to design the oil-pressboard composite insulation of convertor transformer, which is greatly affected by the temperature.
Jinfeng Zhang, Minghe Chi, Qingguo Chen, Wenxin Sun, Jinming Cao   +4 more
doaj   +1 more source

Hydrogen on III-V (110) surfaces: Charge accumulation and STM signatures [PDF]

Physical Review B, 2013
The behavior of hydrogen on the 110 surfaces of III-V semiconductors is examined using ab initio density functional theory. It is confirmed that adsorbed hydrogen should lead to a charge accumulation layer in the case of InAs, but shown here that it should not do so for other related III-V semiconductors.
Castleton, CWM, Höglund, A, Göthelid, M, Qian, MC, Mirbt, S   +4 more
openaire   +1 more source