The use of Dielectric Absorption as a Method for Characterizing Dielectric Materials in Capacitors Public Deposited

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  • March 22, 2019
Creator
  • Hubbard, Devin K.
    • Affiliation: School of Medicine, UNC/NCSU Joint Department of Biomedical Engineering
Abstract
  • 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[greater than or equal to]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.
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  • ... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Biomedical Engineering.
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  • Dennis, Robert G.
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