Thermal Modelling of IGBT Devices

Electro-thermal and thermo mechanical effects are becoming more and more important in power electronic systems as industry seeks to decrease packaging and increase power densities. Therefore the demand for faster and more accurate thermal models is increasing. This paper proposes an improved electro-thermal IGBT model based on a lumped parameter modelling method. The model was developed using MATLAB software (Trigkidis, G, et al., 2002). The electrical model based on Hefners´ IGBT model is further improved using a multi-dimensional model for accurate loss density computation. The development of the thermal model will be presented and the simulated results will be compared with experimental results to corroborate the developed model