DocumentCode :
2422685
Title :
Space charge and orientational polarization within epoxy as probed by the Pulsed Electro-Acoustic technique
Author :
Gallot-Lavallée, Olivier ; Teyssedre, Gilbert ; Laurent, Christian ; Rowe, Stephen
Author_Institution :
Lab. de Genie Electr., Univ. Paul Sabatier, Toulouse, France
fYear :
2003
fDate :
19-22 Oct. 2003
Firstpage :
249
Lastpage :
252
Abstract :
The Pulsed Electro-Acoustic technique, which allows probing the space and time dependence of charge density within insulators, has been applied to probe polarization and space charge phenomena within an epoxy resin under direct current stress. The response appears as a superposition of orientational polarization, due to the polar nature of epoxy resins, and space charge accumulation, both exhibiting a dynamic character considering either polarization or depolarization experiments. Attempts have been made to separate these two contributions to the space charge profile and to reconcile transient currents that can be estimated from the time dependence of space charge and those obtained from external circuit measurements. The influence of the nature of the electrodes that are used for achieving measurements on the nature of space charge is also discussed in this work.
Keywords :
dielectric polarisation; epoxy insulation; pulsed electroacoustic methods; space charge; charge density; direct current stress; epoxy; epoxy resin; insulators; orientational polarization; polarization; pulsed electro-acoustic technique; reconcile transient currents; space charge; space charge phenomena; space charge profile; Charge measurement; Current measurement; Epoxy resins; Extraterrestrial phenomena; Insulation; Polarization; Probes; Pulsed electroacoustic methods; Space charge; Stress;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2003. Annual Report. Conference on
Print_ISBN :
0-7803-7910-1
Type :
conf
DOI :
10.1109/CEIDP.2003.1254840
Filename :
1254840
Link To Document :
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