Search for: All records

Partial discharge issues at the triple junctions of the copper-ceramic-silicone gel interfaces in power electronic modules have emerged as a critical barrier to further technological advancement. Therefore, accurately calculating the electric field intensity and optimizing the insulation system are essential to ensure module reliability and performance. In this study, 2D and 3D geometries of a commercial power module were modeled in COMSOL Multiphysics to analyze the electric field distribution around triple points. The results showed a maximum electric field intensity of 22.5 kV/mm in the 3D model, compared to 15.0 kV/mm in the 2D simulation. This finding emphasizes the critical importance of employing 3D modeling to accurately represent the intricate electric field distribution at triple-edge regions. This work lays the foundation for accurate electric field calculations within power electronic modules, which is essential for determining the extent of electric field mitigation required.