Influence of Inductance on DC/DC Conversion Efficiency

Abstract

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.

Keywords

• power electronic
• dc/dc conversion
• conversion efficiency
• inductance
• local hysteresis loss