Thermo-mechanical stress analysis for an integrated passive resonant module

In this paper, thermo-mechanical stress analysis for a series resonant passive integrated power electronic module (IPEM) is presented. The passive IPEM has in the past been implemented as a resonant tank in resonant DC-DC converters. It has some merits for reducing the total volume of the resonant converter system and improving manufacturability, but this integration process increases the complexity of the thermal and mechanical behavior of the structure due to interactive heating of the module layers and mechanical inter-layer stresses. It is therefore essential to investigate the thermo-mechanical behavior of an IPEM to ensure reliable operation. This paper presents a 3-dimensional thermo-mechanical model based on finite-element modeling (FEM) using I-DEAS software. Results of the thermal analysis and the associated thermal stress analysis are also discussed.