A Step-Down Resonant Modular Multilevel DC/DC Converter With Extendable ZVS Range Based on Asymmetric Triangular Current. - Qianfan Zhou; Zhixing He; Zongjian Li; Renfeng Guan; Ben Zhou; Xucheng Huang; Lei Wang 067; Qianming Xu; Yandong Chen 001 (IEEE Trans. Ind. Electron., 2022)