Estimation of losses in semiconductors of power through simulation

Abstract

This paper presents the development of a simulation methodology to estimate the losses in power semiconductors using PSIM® software and using it as an educational tool. The simulation of the losses is implemented using the curves and the data provided in the datasheets of semiconductors. To validate this methodology, two modulation strategies are applied to the HB/ANPC inverter, modified PD-PWM and modified CSV-PWM, making the inverter operate with half the switches at low frequency (60 Hz) and the other half in high frequency (1020 Hz). Therefore, they were chosen two types of semiconductor switches. First is explained the operation of the inverter used, then the study of conduction and switching losses on the switches and diodes in antiparallel. The analysis of the conduction losses, is used for voltage at the nominal power curves module operation. Whereas the switching losses is used the energy dissipated curves during the ligament and the shutdown of the switches. These losses are displayed in simulation blocks, which are detailed building blocks implemented through a didactic approach. Finally, a comparison between simulated losses using PSIM® software and mathematical methods are performed. Additionally a comparison between the two modulations is performed indicating which produces less loss.