This study proposes a novel non-inverting buck–boost converter topology with extra-wide operational zones under both continuous current mode (CCM) and discontinuous current mode (DCM), by introducing a four-mode modulation (4MM) strategy. The proposed 4MM method is able to eliminate the operation dead zone, thus extending the operation zones of the buck–boost converter to contain boost mode, extended boost mode, extended buck mode, and buck mode. Rigorous analyses and design principles are presented in detail to demonstrate the four-mode function through CCM and DCM operational investigations and illustrations. Theoretical analyses and parameter design are verified by software simulation and hardware experimentation in this study, which validates the proposed 4MM method and the functionality of the proposed 4MM-based buck–boost converter. They clearly indicate the superiority of the proposed 4MM-based four-switch non-inverting buck–boost converter over its conventional counterparts, posing wide applicability in industrial practices.

中文翻译：

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基于高级四模式调制的四开关同相降压-升压转换器，具有额外的工作区

这项研究通过引入四模式调制（4MM）策略，提出了一种在连续电流模式（CCM）和不连续电流模式（DCM）下具有超宽工作区的新型非反相降压-升压转换器拓扑。提出的4MM方法能够消除工作死区，从而将降压-升压转换器的工作区扩展到包含升压模式，扩展的升压模式，扩展的降压模式和降压模式。详细介绍了严格的分析和设计原理，以通过CCM和DCM操作研究和说明来演示四模式功能。本研究通过软件仿真和硬件实验验证了理论分析和参数设计，从而验证了所提出的4MM方法和所提出的基于4MM的降压-升压转换器的功能。