一种新型双输入反激DCDC变换器.pdf

2011 年 2 月 电 工 技 术 学 报 Vol.26 No. 2 第 26 卷第 2 期 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Feb. 2011 一种新型双输入反激DC/DC 变换器 王 勤 张 杰 阮新波 金 科 （南京航空航天大学自动化学院 南京 210016 ） 摘要 传统多输入反激 DC/DC 变换器的电路拓扑结构简单，能实现多种新能源联合供电， 在中小功率应用场合具有很好的应用前景。但该变换器的变压器有多个一次绕组，结构复杂、功 率器件电压应力大，只能实现多种能源的分时供电。本文提出一种新型的多输入反激 DC/DC 变 换器，变压器仅有一个一次绕组，开关器件电压应力降低，各输入源既可以单独向负载供电又可 以同时向负载供电。以双输入为例详细分析该变换器的工作原理，推导其输入输出基本关系，提 出能量管理方法，还推导出一族隔离型多输入变换器的基本电路拓扑。最后通过一个120W 的原 理样机验证了理论分析的正确性和控制策略的有效性。 关键词：多输入 反激变换器 联合供电系统 新能源 中图分类号：TM215.4 A New Double-Input Flyback DC/DC Converter Wang Qin Zhang Jie Ruan Xinbo Jin Ke （Nanjing University of Aeronautics and Astronautics Nanjing 210016 China ） Abstract The traditional multiple-input flyback converter has a simple configuration, and it can be used in the system with two or more sources. It has a good application prospect in the low/medium power situation. However, the converter has some disadvantages such as complex transformer structure due to multiple primary windings, higher voltage stresses across the power switches, and the load can’t achieve power from a variety of energy sources simultaneously. This paper proposes a novel multiple-input flyback converter. The transformer has only one primary winding and the voltage stresses of the power switches are reduced. All the input sources can provide energy simultaneously or individually. A double-input flyback DC/DC converter is taken as an example to analyse its operating principle in detail. The voltage conversion ratio of the input and output voltage is deduced. Power management method of the proposed