Multiobjective optimization of a power supply for space application using a flexible CAD tool

This paper presents the adaptation of a previously published CAD tool that was initially conceived for high power isolated dc-dc converters, to the multiobjective optimal design of a switch-mode power supply for space application. The main changes to the existing tool concern the magnetic elements (transformer and inductor), the reduction of voltage and current ratings of the semiconductor devices, the cooling aspects, and the input filter design. The database of the tool is also enriched with silicon carbide devices in order to highlight, for the considered application, the benefits of using this new technology. The Pareto fronts in terms of power loss and mass are shown for two sets of electrical specifications of the power supply. Several solutions are analyzed in detail through the values of the optimization variables.