Automated Design of CLLLC Resonant Converters Based on Time-Domain Model

This paper demonstrates how metaheuristic methods can be used to find optimal design parameters for power electronic converters. The method will be applied to the CLLLC resonant converter, a popular choice for bidirectional applications such as battery chargers. This topology is a complex system that requires a time-consuming design process, which is why developers often resort to simplifications, including first harmonic approximation or design constraints. However, these methods lack accuracy or drastically limit the solution space. In this paper, the time-domain model of the CLLLC resonant converter will be used to obtain accurate calculation results, while an optimization algorithm determines component values in an automated manner. It will be shown that significant improvements can be achieved for a given converter specification and reference design.