关键词: 电力电子, DC/DC变换, 转换效率, 电感, 局部磁滞损耗

Abstract: Aiming at the influence of inductance on DC / DC conversion performance, taking boost converter as an example, this paper analyzes the equivalent circuit and conversion efficiency factors of boost converter under non ideal conditions, and obtains the relationship between inductance parameters and circuit output voltage and conversion efficiency. Based on the analysis of the influence of inductance parameters on the current ripple and circuit efficiency, a method of limiting the selection range of inductance value is proposed based on the traditional design of filter inductor based on the critical continuous current. The local hysteresis loss and copper loss of ks226-075a core are calculated, and the change trend of DC / DC converter conversion efficiency with the increase of inductance is obtained. Finally, the correctness of the theory and the feasibility of the method are verified by inductance is corrected according to the experimental results, and the error between the calculation results and the experimental results is analyzed and explained.

Key words: power electronic, DC/DC conversion, conversion efficiency, inductance, local hysteresis loss