Open AccessEffect of Insulator Bulk Conductivity Non-uniformity on Surface Charge Accumulation
Author(s) -
Qunzhi Zhu,
Wenbing Zhu,
Mengzhao Zhu
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1639/1/012024
Subject(s) - electric field , insulator (electricity) , surface charge , surface conductivity , conductivity , materials science , charge density , resistive touchscreen , voltage , electrical resistivity and conductivity , condensed matter physics , capacitive sensing , charge (physics) , electric charge , analytical chemistry (journal) , optoelectronics , electrical engineering , chemistry , physics , chromatography , quantum mechanics , engineering
In order to clarify the effect of insulator bulk conductivity non-uniformity, controlled by electric field, on surface charge accumulation under dc high voltage, a simulation model involving multi-physics, which includes transition from initial capacitive to stationary resistive field, is established. In terms of this, the characters of surface charge accumulation are obtained. It is found that non-uniformity of electric conductivity contributes to the change of surface charge distribution profile, but not to the increase of the maximum surface charge density when the applied voltage is less than 1000 kV. After voltage exceeds 1000 kV, the maximum charge density becomes smaller compared to the case with uniform conductivity. The results indicate that electric conductivity non-uniformity relating to electric field is a source contributing to surface charge accumulation through insulator bulk, and should not be neglected.