An Improved Dynamic Performance Control Method for CLLC Resonant Converter Based on State Trajectory

CLLC converter is a promising topology for isolated bidirectional converter applications such as aerospace power supply, uninterruptible Power Supply, high dynamic control is required. In this paper, an improved dynamic performance control method based on state trajectory for CLLC converter is proposed. The state trajectory model of CLLC is generated, and the optimal path for CLLC converter is established using this model in load transient. The pulse widths of the gate-driving signals are calculated according to the variation of load current. The correctness of the proposed state trajectory model and dynamic performance of the proposed control method are verified by simulation, which demonstrates an improvement in dynamic performance compared to the traditional linear control.