| Title |
Design of Coupled Inductor in Boost Converter for Size Reduction Through Core Type Conversion |
| Authors |
유준열(Jun-Yeol Ryu) ; 조수연(SuYeon Cho) ; 신양진(Yangjin Shin) ; 이동재(Dong Jae Lee) ; 설현수(Hyun-Soo Seol) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.1.76 |
| Keywords |
Boost converter; Coupled inductor; Equivalent magnetic circuit; Finite element analysis; Inductance |
| Abstract |
One of the most important issues in boost converter design is the minimization of size and the achievement of high power density in the coupled inductor, which is an essential component of the converter. Because the losses in the inductor inevitably increase when the size is reduced, it is necessary to change the core type. When the core type is changed, both the flux distribution and the characteristics of the inductor are also altered, so a method to accurately predict its performance is required. In consideration of these issues, an improved design for coupled inductor was developed. First, the relationship between each part of the inductor and its parameters was analyzed. Then, the appropriate core type was selected based on this investigation. In the improved design aimed at size reduction, the equivalent magnetic circuit (EMC), known for its fast computation, was constructed to reduce the computational time. The electric parameters corresponding to design variables were calculated using the EMC, and then the optimal model was selected. The accurate electric parameters and losses of the designed model were predicted through the finite element analysis. Finally, the experimental validation of the designed model was performed. |