燃料电池用新型高升压比DC/DC变换器  

A Novel Boost-Buck Converter with High Conversion Ratio for Fuel Cell

作　　者：张珂[1] 全书海[1] 黄亮[1] 曹旭[1] 

机构地区：[1]武汉理工大学自动化学院,湖北武汉430070

出　　处：《武汉理工大学学报（信息与管理工程版）》2012年第4期464-466,484,共4页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：国家"863"计划基金资助项目(2008AA05Z105);教育部博士点基金资助项目(20090143110004)

摘　　要：由于燃料电池发电系统的输出特性偏软,大功率DC/DC变换器是其必不可少的零部件之一。提出了一种新型高升压比的升降压DC/DC变换器,它由buck电路和一种多级自主升压boost电路组成。该变换器可在宽范围输入的条件下达到稳压输出,实现低占空比升压,降低了开关管的导通损耗,可有效提高效率。新型电路实际应用于自主研发的大功率单向DC/DC变换器中,取得了良好的效果。The output characteristics of generating system of fuel cell has been moderating, so high power DC/DC converter become one of the essential key parts. A new kind of DC - DC converter with high conversion ratio was introduced. It consists of a buck circuit and a kind of poly stage step up by itself boost circuit. This kind of converter can attain stable regulate output at wide range of input. It can achieve the low dutycyele to step up, and it can reduce the tutor gudie wastage of a switch. Furthermore, it can improve the efficiency valid. In addition, this kind of converter has applied in the high - power and unidirectional DC/DC converter of independent research and development, and it gets a great performance.

关 键 词：燃料电池 高升压比 大功率 变换器 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]