一种实现氮化镓单级车载充电机全范围零电压开关的多目标优化调制策略

In the pursuit of higher power density and operational efficiency in electric vehicle charging systems, the Boost-type integrated dual active bridge (BI-DAB) converter has garnered significant attention. However, traditional modulation schemes exhibit limited zero-voltage switching (ZVS) ranges and insufficient optimization flexibility, which diminishes efficiency and constrains the practical applications of BI-DAB converters. To address these challenges, this paper proposes a hybrid software-hardware multi-objective optimization modulation scheme designed to extend the ZVS operating range and enhance converter efficiency. A comprehensive ZVS model for the BI-DAB converter is established by which the ZVS conditions are derived. The influence of magnetizing inductance is considered, and a hybrid approach that combines the optimal design of magnetizing inductance and phase-shift optimization enables full-range all-ZVS operation. Additionally, the proposed modulation scheme facilitates seamless mode transitions while effectively achieving power factor correction (PFC) and quasi-optimal current stress conditions. Finally, a GaN-based 2 kW/150 kHz BI-DAB converter prototype was constructed, achieving a peak efficiency of 96.6% and a total harmonic distortion (THD) of 1.5%.