Comparison of the Usefulness of Selected Software for Modeling Characteristics of SEPIC DC-DC Converters

This paper concerns the modeling of the static and dynamic characteristics of the SEPIC converter. Simulation models of this system were developed for three different programs: SPICE, PLECS, and ANSYS Simplorer. These models utilized the built-in models of the passive and semiconductor components present in each of the considered programs. Additionally, an electrothermal model of this converter was formulated for SPICE. Transient analyses of the considered system were performed using all presented models, and the obtained calculation results were compared with the measurement results. The conditions under which the calculation results were obtained for the mentioned programs were identified. The calculation times for the individual programs and the considered electronic component models were also compared. The presented results show that the most accurate are those analyses performed using ANSYS Simplorer and SPICE with the electrothermal model. The fastest are those analyses performed using PLECS, and the most time-consuming are those analyses performed using SPICE with the electrothermal model.