一种应用于分布式电源的高增益双输入DC-DC变换器  

A High Gain Dual Input DC-DC Converter for Distributed Power Supply

作　　者：刘明[1,2] 赵作男 谢国民 LIU Ming;ZHAO Zuonan;XIE Guomin(Department of Mathematics and Computer,Chaoyang Teachers College,Chaoyang 122000,Liaoning,China;School of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105,Liaoning,China)

机构地区：[1]朝阳师范高等专科学校数学与计算机系,辽宁朝阳122000 [2]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125105

出　　处：《电气传动》2020年第9期53-59,共7页Electric Drive

基　　金：国家自然科学基金(51274118)。

摘　　要：通过对传统开关电感倍压单元的研究,提出一种新型耦合电感倍压单元。针对分布式电源需要多个电源输入的要求,提出一种高增益低电压应力的双输入DC-DC变换器。新型变换器具有单输入和双输入2种模式;通过改变耦合电感倍压单元的匝比,可以大幅提升变换器电压增益;在输出端采用三电平结构,双输入模式变换器开关管和二极管截止时,两端电压仅为输出电压的50%。分析了变换器在单输入、双输入模式下的工作模态;给出了变换器主要工作波形;推导了变换器电压增益、开关管和二极管两端电压表达式;根据变压器模型建立了漏感等效模型,并分析了漏感对变换器电压增益的影响。通过实验验证了理论分析的正确性。A novel coupled inductor voltage doubling unit was proposed by studying the traditional switching inductor voltage doubling unit.In view of the requirement of multiple power inputs for distributed power supplies,a dual-input DC-DC converter with high gain and low voltage stress was proposed.The new converter had two modes:single input and dual input;the converter voltage gain could be greatly improved by changing the turns ratio of the coupled inductor voltage doubling unit;the three-level structure was used at the output,and the converter switch and diode were used in the dual input mode.At the time of the cutoff,the voltage at both ends was only 50%of the output voltage.The operating modes of the converter in single-input and dual-input modes were analyzed.The main working waveforms of the converter were given.The voltage gain of the converter,the expression of the voltage across the switch and the diode were derived.The leakage inductance equivalent model was established according to the transformer model.The effect of leakage inductance on the voltage gain of the converter was analyzed.The correctness of theoretical analysis was verified by experiments.

关 键 词：开关电感 耦合电感 倍压单元 双输入 漏感 

分 类 号：TM46[电气工程—电器]