一种高增益耦合电感双管Sepic变换器  

High gain double-switch Sepic converter with coupled inductors

作　　者：郭瑞[1] 韩冬 任佳炜 GUO Rui;HAN Dong;REN Jia-wei(School of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105,China)

机构地区：[1]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：《电机与控制学报》2020年第7期130-138,共9页Electric Machines and Control

基　　金：国家自然科学基金(U1510128);辽宁省教育厅项目(LJ2017FBL003)。

摘　　要：针对传统DC-DC变换器电压增益低,开关器件电压应力大和损耗高的问题,在传统Sepic变换器的基础上,引入耦合电感单元和有源开关电感单元,提出了一种高增益耦合电感双管Sepic变换器拓扑结构。该变换器具有高电压增益,避免了变换器工作在极限占空比状态,降低了开关器件电压应力,实现二极管的零电流关断和开关管的零电流开通,缓解二极管的反向恢复问题,减小开关管的损耗,提高变换器的效率。详细分析该变换器的工作原理,推导变换器的电压增益和开关器件的电压应力大小,研究漏感导致的占空比丢失问题对变换器增益的影响,给出关键参数设计,与其他拓扑在电压增益、开关器件电压应力等方面进行性能对比分析,最后设计一台100 W的实验样机,实验结果验证了理论分析的正确性。To solve the problems of low voltage gain,high loss and high voltage stress on switches in traditional DC-DC converter,a kind of high gain double-switch Sepic converter with coupled inductors was proposed by introducing coupled inductors and active switching inductor into the traditional Sepic converter.The proposed high voltage gain converter avoids limit duty cycle working mode and reduces voltage stress on switches.Zero current turn-off of the diodes and zero current turn-off of the switches were achieved,and the reverse recovery problem of diode was alleviated,thus,the loss of the switches was reduced and the efficiency of the converter is improved.The working principle of this converter was analyzed in detail,the expression of voltage gain and voltage stress were derived,and the influence of the duty cycle loss on the converter caused by the leakage inductance was studied.The key parameters of the converter were designed and comparison of performance analysis with other converter topologies were made on several aspects such as voltage gain and voltage stress on switches.A 100 W experimental prototype was constructed.Validity of the theoretical analysis is verified by the experimental results.

关 键 词：高增益 SEPIC变换器 耦合电感 有源开关电感 占空比丢失 零电流 

分 类 号：TM46[电气工程—电器]