Two-Objective-Oriented Resonant Parameter Design for Symmetrical CLLC Dual Active Bridge Converter with Swarm Intelligence

An optimal design approach is proposed in this paper for the resonant parameters in symmetrical CLLC-type dual active bridge (DAB) converter with considerations of the efficiency of the DAB converter and stability in a cascaded system simultaneously. The main idea of priority-based method adopted in this paper is to give priority to one of the two design objectives at one time. And swarm intelligence is used in this method to find the suitable values of resonant parameters with accuracy and efficiency. Finally, the simulations and experimental results have proved the validity of this design method.