Exploration of the $\eta-\rho$ Pareto Optimization of Bidirectional Isolated DC-DC Power Electronic Converters for More Electric Aircraft

This work presents the efficiency
$(\eta)$
versus power density
$(\rho)$
Pareto optimization of the main bidirectional isolated DC-DC Power Electronic Converters (PECs) proposed for the electric aircraft. The considered topologies are Dual-Active-Bridge (DAB) and Active-Bridge-Active-Clamp (ABAC). This optimization procedure aims to get a deep insight into the impact of the different design space variables on the converter performance. To this aim, the component models utilized to develop the optimization procedure are described in detail considering different magnetic materials, heatsink Cooling System Performance Index (CSPI), as well as capacitor and semiconductor technologies. Therefore, the design trade-offs that lead to the
$\eta-\rho$
Pareto-front optimal results of these PEC topologies are described and compared in detail. In this context, DAB converter shows a slightly better
$\eta-\rho$
trade-off with the considered components than the obtained for ABAC.