Research on Automotive Bidirectional CLLC Resonant Converters Based on High-Order Sliding Mode Control

A CLLC resonant converter’s gain is easily influenced by the operating frequency, and when frequency adjusted over a wide range, efficiency of converter greatly reduced. Traditional closed-loop control strategies also have disadvantages such as slow dynamic response vulnerability to load. In this paper, high-order sliding mode (SMC) design method proposed based on current problems characteristics automotive converters. surface output voltage includes higher-order differential terms for an error integral term voltage, which reduces range improves its responsiveness, thus increasing efficiency. order verify accuracy algorithm, simulation model built in MATLAB stability controller varying input magnitude load dynamics abruptly parameters voltage. Comparing SMC with PID shows that more suitable