摘要
为使直流变换器获得更高的电压增益,采用电路分析方法,将耦合电感倍压单元引入到组合式Sepic变换器,同时将两个储能电感与耦合电感进行磁集成,提出一种带有耦合电感的磁集成高增益组合Sepic拓扑直流变换器。分析了变换器的工作原理,给出了变换器各个工作模态,推导并求解得到变换器的电压增益表达式,同时获得了开关管的电压应力。研究结果表明:变换器耦合电感电流纹波与电感量比、电感耦合度有关,在耦合电感的电感量比为1及全耦合的情况下,变换器的电压增益是传统Sepic变换器的1+(1+n)/D倍。变换器的2个储能电感与耦合电感通过解耦集成的方式进行磁集成,有效地利用磁芯结构,减少了磁芯数量,集成磁件的体积比独立磁件减小了近30%;变换器实验样机效率达到了92.8%,测试的实验波形结果验证了理论分析的正确性。研究结论可为磁集成高增益耦合电感组合变换器的设计提供了理论依据。
In order to achieve higher voltage gain of DC converter,a combined Sepic converter with high gain of magnetic integrated Sepic topological converter was proposed by introducing the coupling inductor voltage doubling unit into the combined Sepic converter by circuit analysis method.Two energy storage inductors were magnetically integrated with the coupling inductor.The operating principle of the converter is analyzed,the operating modes of the converter are given,the voltage gain expression of the converter is derived and solved,and the voltage stress of the switching tube is obtained.The results show that the current ripple of the coupling inductance of the converter is related to the inductance quantity ratio and inductance coupling degree.The voltage gain of the converter is 1+(1+n)/D times that of the conventional Sepic converter when the coupling inductance quantity ratio is 1 and the coupling degree is full.The two energy storage inductors and coupling inductors of the converter are magnetically integrated by decoupling integration,which effectively uses the magnetic core structure and reduces the number of magnetic cores.The volume of the integrated magnetic component is reduced by nearly 30%compared with the independent magnetic component.The efficiency of the prototype reaches 92.8%,and the experimental waveform results verify the correctness of the theoretical analysis.The research results provide a theoretical basis for the design of magnetic integrated high-gain coupled inductor combined converter.
作者
李洪珠
时屹嵩
孙瑄瑨
LI Hongzhu;SHI Yisong;SUN Xuanjin(Faculty of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105,China)
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2023年第4期475-483,共9页
Journal of Liaoning Technical University (Natural Science)
基金
辽宁省自然科学基金项目(2019-MS-159)
关键词
SEPIC变换器
电压增益
电感电流纹波
磁集成技术
Sepic converter
voltage gain
inductor current ripple
magnetic integration technology
