Dissertation/Thesis Abstract

The use of Dielectric Absorption as a Method for Characterizing Dielectric Materials in Capacitors
by Hubbard, Devin K., M.S., The University of North Carolina at Chapel Hill, 2010, 70; 1483166
Abstract (Summary)

Dielectric absorption (soakage) is a phenomenon wherein the stored electric field within the dielectric of a capacitor will cause the plates of that capacitor to recharge despite having been fully discharged. Recently Cosmin Iorga proposed a mathematical model describing dielectric absorption as an infinite sum of decaying exponentials5. We have expanded on the definition put forth by Iorga and have proposed a model for two capacitors arranged in parallel. We examine the effect of electrical short time (ts), charge voltage (Vc), capacitance (C), and dielectric material on maximum absorption signal and the average time constant of the absorption signal (t68%). While our results are consistent with those of Iorga, we did observe some divergent behavior for ts ≥ 10 seconds. Our examination suggests the possibility of using dielectric absorption as a method for sensor applications to be used in addition to current analytical techniques for characterizing dielectric materials.

Indexing (document details)
Advisor: Dennis, Robert G.
Commitee: Favorov, Oleg, Tommerdahl, Mark
School: The University of North Carolina at Chapel Hill
Department: Biomedical Engineering (Joint)
School Location: United States -- North Carolina
Source: MAI 49/02M, Masters Abstracts International
Subjects: Biomedical engineering
Keywords: Biofuels, Capacitors, Dielectric absorption, Dielectric relaxation, Dielectric soakage
Publication Number: 1483166
ISBN: 978-1-124-34964-0
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