Contactless electric field and space charge measurement across solid dielectrics: A fully non-intrusive thermal technique

Abstract

Space charge measurement techniques are widely used to characterize dielectrics. There are several methods : some are destructive, some others are non-destructive (i.e., they neither degrade the materials mechanically nor alter their electrical state). This paper is dedicated to the description and the feasibility of a non destructive contact-less method to measure space charges. This contact-less method is based on standard Thermal Step Method and allows space charge measurements under electrical stress, keeping the non destructive property of the original method.