Deformation of bubbles in silicon gel insulation under an alternating electric field
Paper in proceeding, 2019

The behavior of silicone gel under electrical stress plays a significant role in the reliability and durability of high voltage electronic power devices due to its widespread use for the insulation of IGBT modules and other components. The charges accumulation at the bubble boundaries leads to significant displacements due to the establishment of Coulombic forces and the high deformability of colloidal system. The main purpose of this work is to validate a numerical approach useful to investigate, for a given silicone gel, the non-linear relation between the applied HVAC stress and the electric field over an air bubble within the insulation bulk. The analysis has been carried out by means of numerical and experimental approach in order to compare the results of a case study and validate the adopted model.



partial discharges.


Silicone gel


G. Rizzo

University of Palermo

P. Romano

University of Palermo

G. Ala

University of Palermo

Thomas Hammarström

Chalmers, Electrical Engineering, Electric Power Engineering

Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP

00849162 (ISSN)

Vol. 2019-October 536-539 9009969

Conference on Electrical Insulation and Dielectric Phenomena (CEDIP 2019)
Richland, USA,

Driving Forces

Sustainable development

Subject Categories

Applied Mechanics

Fluid Mechanics and Acoustics

Other Electrical Engineering, Electronic Engineering, Information Engineering

Areas of Advance


Materials Science



More information

Latest update

4/5/2022 6