一种具有自电压平衡和软开关功能的升压型非隔离模块化多电平DC-DC变换器

Evolving from the popular modular multilevel ac–dc converter, the single-stage nonisolated modular multilevel dc–dc converter (MMDC) is advantageous for medium- and high-voltage applications. However, exploiting ac circulating power to balance the submodule energy, when utilized for high step ratio applications, existing MMDC topologies suffer from circulating current through the arms and large fi...