Estimation of power losses and temperature distribution in three-phase inverter

Several techniques for estimating of power losses in power inverters are known. This paper presents a calculation of power losses of the inverter and following specification of a heatsink, junction to case temperature. For the power loss estimation, two methods were used. Firstly, the equation representing the conduction and switching losses for the inverter were utilized. Secondly, the characteristics of a given insulated gate bipolar transistor (IGBT) are extracted from the datasheet and put into electro-thermal simulation using Matlab-Simulink. The electro-thermal simulation consists of the power losses estimation and calculation of junction to the case temperature of the IGBT. The temperature distribution is simulated using software Fusion 360.