6533b7d0fe1ef96bd125aee8
RESEARCH PRODUCT
Deformation of bubbles in silicon gel insulation under an alternating electric field
Guido AlaThomas HammarströmG. RizzoPietro Romanosubject
010302 applied physicsMaterials scienceinsulationreliabilityDeformation (mechanics)020209 energyBubbleHigh voltage02 engineering and technologyDielectric01 natural sciencesSpace chargeIGBTSilicone gelStress (mechanics)chemistry.chemical_compoundpartial dischargeSettore ING-IND/31 - ElettrotecnicaSiliconechemistryElectric field0103 physical sciences0202 electrical engineering electronic engineering information engineeringComposite materialdescription
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 HVDC 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-10-01 |