电感对DC/DC变换效率影响分析  

Influence of Inductance on DC/DC Conversion Efficiency

作　　者：巫付专[1] 李昊阳 巫曦 陈蒙娜 WU Fuzhuan;LI Haoyang;WU Xi;CHEN Mengna(School of Electronic and Information,Zhongyuan University of Technology,Zhengzhou 451191,Henan Province,China)

机构地区：[1]中原工学院电子信息学院,河南省郑州市451191

出　　处：《发电技术》2023年第4期576-582,共7页Power Generation Technology

基　　金：国家自然科学基金重点项目(U1813201);河南省科技攻关项目(172102210602)。

摘　　要：针对电感对DC/DC变换性能影响的问题,以Boost变换器为例,对非理想情况下Boost变换等效电路和转换效率影响因素进行了分析,得到电感参数与电路输出电压、转换效率的关系。根据电感参数对电流纹波和电路转换效率影响的分析,在传统以临界连续电流为依据设计滤波电感值的基础上,提出了一种约束电感值选择范围的方法,并对KS226-075A磁芯的局部磁滞损耗和铜耗进行了计算,得到DC/DC变换器转换效率随电感值增大的变化趋势。最后,通过实验验证了理论的正确性和方法的可行性,同时根据实验结果修正了电感值的选取范围,并对计算结果与实验结果存在的误差进行了分析说明。Aiming at the influence of inductance on DC/DC conversion performance,this paper took the Boost converter as an example to analyze the factors affecting the equivalent circuit and conversion efficiency of Boost converter under the non-ideal conditions,and obtained the relationship between inductance parameters and circuit output voltage and conversion efficiency.On the basis of analyzing the influence of inductance parameters on the current ripple and circuit efficiency,a method to limit the selection range of inductance value was proposed based on the traditional design of filter inductor considering the critical continuous current.The local hysteresis loss and copper loss of KS226-075A core were calculated,and the change trend of DC/DC converter conversion efficiency with the increase of inductance was obtained.Finally,the correctness of the theory and the feasibility of the method were verified by experiments.At the same time,the selection range of inductance was corrected according to the experimental results,and the error between the calculation and experimental results was analyzed and explained.

关 键 词：电力电子 DC/DC变换 转换效率 电感 局部磁滞损耗 

分 类 号：TK01[动力工程及工程热物理] TM133[电气工程—电工理论与新技术]