Normal phase-shift and modified pulse-width modulation gating schemes are proposed for a full bridge high-frequency capacitor–inductor–inductor (CLL) resonant DC–DC converter, and its performance is analysed in this study. Detailed modelling and the steady-state analysis of the converter are performed by using the fundamental harmonic approximation approach. Various modes of the converter operation with both the gating schemes are described and examined in detail. Zero-voltage switching of all the main switches is achieved by designing the resonant converter to operate in the above resonance mode. The optimum design of the converter is illustrated with the help of a flowchart and design curves. PSIM simulation is carried out and the experimental prototype is built to substantiate theoretical performance predictions. The simulation and experimental results are presented and compared.

中文翻译：

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带有相移和改进PWM选通方案的高频CLL谐振DC-DC转换器的性能评估：分析，设计和实现

针对全桥高频电容器-电感器-电感器（CLL）谐振DC-DC转换器，提出了正常的相移和改进的脉宽调制门控方案，并对其性能进行了分析。通过使用基波谐波近似方法，可以对转换器进行详细的建模和稳态分析。详细介绍了两种选通方案的转换器操作的各种模式。通过将谐振转换器设计为在上述谐振模式下运行，可以实现所有主开关的零电压开关。借助流程图和设计曲线说明了转换器的最佳设计。进行了PSIM仿真，并构建了实验原型来证实理论性能预测。