李洪珠 曹人众 张垒 李洪璠

摘 要：为了提高传统Buck/Boost变换器的电压增益、暂态响应速度同时减小电感支路的电流纹波和变换器的体积重量。将磁集成开关电感技术和交错并联技术应用到传统的Buck/Boost变换中，提出了磁集成开关电感交错并联Buck/Boost变换器。通过采用开关电感结构替换传统变换器中的电感的方式，使变换器正向功率变换的电压增益提高为原来的2倍。采用磁集成技术并合理设计耦合电感间的耦合系数能够减小该变换器电感支路的电流纹波、提高系统暂态响应速度、减小变换器的体积重量，进而提高变换器的电气性能。最后通过实验样机的结果验证了理论分析的正确性。

关键词：Buck/Boost变换器；开关电感；磁集成；交错并联；电压增益

中图分类号：TM 4

文献标志码：A

文章编号：1007-449X（2018）06-0087-09

Abstract：It aims to improve the voltage gain and the transient response speed of the traditional Buck/Boost converter meanwhile reduce the current ripple and the volume weight of the converter. The magnetic integrated switch inductance technology and the interleaved parallel technology are applied to the traditional Buck/Boost transform，and a magnetic integrated switch inductor interleaved parallel Buck/Boost converter is proposed.The switching inductance structure was used to replace the inductance in the traditional converter， so that the voltage gain of the converter forward power conversion was increased to 2 times.The current ripple with integrated magnetics and the coupling coefficient of coupling inductance between the rational design of the converter can reduce the inductance branch， improve transient response speed， reduce the weight of the converter， and then improve the electrical performance of the converter.The experimental results verify the correctness of the theoretical analysis.

Keywords：Buck/Boost converter；switching inductor； magnetic integration； interleaving magnetic；voltage gain

0 引 言

隨着全球的目光逐渐集中在新能源的开发利用上，高性能的双向功率变换直流变换器也受到了普遍关注，近年来为了提高直流变换器的电气性能，很多学者将交错并联、磁集成、开关电感等技术引用到了直流变换器中[1-4]。文献[5]将交错并联磁集成技术应用到DC/DC变换器中，减小了稳态电流纹波、提高了暂态响应速度。文献[6]将开关电感应用到了Boost变换器中，使Boost变换器的电压增益有所提高。文献[7]将开关电容方案引用到了直流变换器中，使变换器的电压成倍的提高。文献[8]利用开关电感替代传统双向DC/DC变换器中的存储电感，视线输入输出电流纹波减少，同时提高了变换器的动态响应速度，就此分析方式创新了传统的BuckBoost变换器。……