Fundamental Study of High Step-down Non-isolated Multicellular DC-DC Converter for Future DC Distribution Systems  

作　　者：Yusuke Hayashi Yoshikatsu Matsugaki Tamotsu Ninomiya 

机构地区：[1]Green Electronics Research Institute, Kitakyusyu, Fulmoka 808-0135, Japan

出　　处：《Journal of Energy and Power Engineering》2017年第9期605-613,共9页能源与动力工程（美国大卫英文）

摘　　要：A novel high step-down non-isolated DC-DC converter has been proposed. The proposed converter consists of highly efficient non-isolated cell converters using bidirectional semiconductor power devices, and these cell converters are connected in ISOP （input series and output parallel）. The non-isolated ISOP converter achieves high step-down ratio of D/N, operating N cell converters under the duty ratio olD. Availability of the proposed converter has been shown by developing the 48 V-12 V laboratory prototype using two 24 V-12 V cell converters. Design consideration for the 48 V-3 V multicellular converter using four 12 V-3 V cell converters has been also conducted, and the potential to approach the efficiency of 97% has been discussed. The proposed topology is suitable for the POL （point of load） converters in the highly efficient next generation DC distribution system for data centers.

关 键 词：DC-DC converter high step-down ratio ISOP GaN （gallium nitride）. 

分 类 号：TN624[电子电信—电路与系统] U674.703.3[交通运输工程—船舶及航道工程]