Title :
A model for the simulation of relaxation phenomena in dielectrics
Author :
Esposti, G. Degli ; Tommasini, D.
Author_Institution :
Dept. of Electr. Eng., Pavia Univ., Italy
fDate :
8/1/1990 12:00:00 AM
Abstract :
A simulation of the behavior of the complex permittivity in a polymeric material as a function of frequency is presented. Starting from experimental data and taking into account the occurrence of a distribution function in the relaxation times, an electrical equivalent circuit for each material can be established. Then, the model is used to analyze some insulating systems. The curves are calculated for a stratified insulation and for a single material subjected to chemical degradation. An experimental study on ad hoc polypropylene films purposely processed with different concentrations of a particular polar additive is presented and discussed on the basis of the model. Several possible applications are considered
Keywords :
dielectric relaxation; equivalent circuits; organic insulating materials; permittivity; polymer films; complex permittivity; distribution function; electrical equivalent circuit; insulating systems; polar additive; polymeric material; polypropylene films; relaxation phenomena; stratified insulation; Chemicals; Circuit simulation; Degradation; Dielectric materials; Distribution functions; Equivalent circuits; Frequency; Insulation; Permittivity; Polymers;
Journal_Title :
Electrical Insulation, IEEE Transactions on
