A Constant Current Control Method with Improved Dynamic Performance for CLLC Converters

In this paper, a novel constant current control method, with improved dynamic performance over the conventional PI method, is proposed for the CLLC converter. We proposed a state trajectory model for the CLLC converter. Based on the proposed the state trajectory analysis, a novel dead-band based control method with improved dynamic performance is proposed. The effectiveness of the proposed method was verified by experimental results. The response time was hugely reduced (less than 50% of the PI method) and no overshoot was detected.