Soft switching characteristic analysis and design of an interleaved boost‑integrated bidirectional CLLC resonant converter

A current-fed isolated bidirectional DC–DC resonant converter has the advantages of wide voltage gain, low current ripple, and power transfer in both directions, but input voltage and load changes affect the resonant current during switching, influencing the soft switching performance of the converter. When the converter cannot achieve soft switching, its operating frequency is limited, and its operating efficiency is greatly reduced. In this study, an interleaved boost-integrated bidirectional CLLC resonant converter with a fixed-frequency synchronous PWM control strategy is comprehensively analyzed for the soft switching operating range. Considering the semiconductor junction capacitance, the design guidelines for the full-range soft switching parameters of the converter are given, including the design of the transformer turns ratio, input inductance, resonance impedance, and inductance ratio. The experimental results based on GaN–HEMT verify the validity of the converter and the correctness of the theoretical analysis.

Statistics

Show / Hide Statistics

Statistics (Past 3 Years)
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

F. Wang, S. Li, B. Liu, J. Chen, R. Li, W. Zhang, L. Fang, Z. Zhang, "Soft switching characteristic analysis and design of an interleaved boost‑integrated bidirectional CLLC resonant converter," Journal of Power Electronics, vol. 26, no. 2, pp. 316-329, 2026. DOI: 10.1007/s43236-025-01083-5.

[ACM Style]

Fangyong Wang, Shucheng Li, Bangyin Liu, Jing Chen, Rui Li, Weilong Zhang, Li Fang, and Zhengqing Zhang. 2026. Soft switching characteristic analysis and design of an interleaved boost‑integrated bidirectional CLLC resonant converter. Journal of Power Electronics, 26, 2, (2026), 316-329. DOI: 10.1007/s43236-025-01083-5.