查看文章

An LLC converter design process includes the determination of resonant tank values, transformer turns ratio, resonant frequency and range of switching frequencies. Maximum converter efficiency is achieved by optimizing these converter parameters. LLC resonant converters with frequency control for wide voltage range applications may result in a wide range of switching frequencies. The efficiency of the resonant converter reduces as it moves away from the resonant frequency (f _s ). Morphing the primary bridge between a full bridge (FB) and a half bridge (HB) helps in reducing the range of effective voltage gain, thus reducing the range of f _s . The work in this paper is based on evaluating the optimum design parameters for an LLC converter with topology morphing and synchronous rectification for maximizing the overall converter efficiency. The optimization is based on a time domain mathematical model with …