A Novel Structure of Variable Inductance High-Frequency Transformer for Power Level Enhancement in Dual-Active-Bridge Converters

Cheol-Woong Choi, Jae-Sub Ko, Keun-Yong Yoon, Yong-Un Park, Yun-Soo Kang and Dae-Kyong Kim ()
Additional contact information
Cheol-Woong Choi: Department of Electrical Engineering, Sunchon National University, Suncheon 57922, Republic of Korea
Jae-Sub Ko: Department of Electrical Engineering, Gangneung-Wonju National University, Wonju 26403, Republic of Korea
Keun-Yong Yoon: Department of Electrical Engineering, Sunchon National University, Suncheon 57922, Republic of Korea
Yong-Un Park: Energy Innovative Industry R&D Department, Green Energy Institute, Mokpo 58656, Republic of Korea
Yun-Soo Kang: Department of Mathematics Education, Sunchon National University, Suncheon 57922, Republic of Korea
Dae-Kyong Kim: Department of Electrical Engineering, Sunchon National University, Suncheon 57922, Republic of Korea

Energies, 2025, vol. 18, issue 5, 1-12

Abstract: This study presents a novel structure proposal of a variable inductance high-frequency transformer for enhancement power level of a dual-active-bridge (DAB) converter. The DAB converter is a solid-state transformer (SST) that requires high efficiency, power density, flexibility, and stability. Variable inductance facilitates achieving and extending maximum power levels. The proposed method adjusts the inductance based on the core insertion conditions of the transformer used in the DAB converter without requiring an additional inductor. The method was verified by analyzing the variable inductance characteristics of the transformer based on core insertion conditions via finite element analysis (FEA) and simulation and experiments within the variable inductance range.

Keywords: high-frequency transformer; variable magnetics; DAB converter; extend power level (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/5/1043/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/5/1043/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:5:p:1043-:d:1596401

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().