Title :
Teflon-FEP charged by microsecond voltage pulses: numerical results and model
Author :
Altafim, Ruy A C ; Ferreira, Guilherme Leal
Author_Institution :
Dept. of Electr. Eng., Sao Paulo Univ., Brazil
Abstract :
We have reported previously on measurements of surface potential of Teflon-FEP foils charged by the impulse method (up to 2 kV peak and ~1 microsecond rise time) in a planar geometry. In this work, we propose a model that explains those results, based on Townsend´s pre-discharge theory in the air gap. The numerical results are in good agreement with experimental results for air gaps from 20 and 80 μm
Keywords :
Townsend discharge; air gaps; electric breakdown; foils; impulse testing; numerical analysis; polyethylene insulation; surface charging; surface potential; 1 mus; 2 kV; 20 to 80 mum; Teflon-FEP foils; Townsend pre-discharge theory; air gap; breakdown voltage; impulse method; microsecond voltage pulse charging; model; numerical results; planar geometry; rise time; surface potential; Air gaps; Current density; Current measurement; Dielectrics; Electrodes; Geometry; Numerical models; Surface charging; Time measurement; Voltage;
Conference_Titel :
Electrets, 1996. (ISE 9), 9th International Symposium on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-2695-4
DOI :
10.1109/ISE.1996.578067
