Phase‑shifted full‑bridge converter with coupled‑inductor‑based rectifier

Byoung-Gi Choi; Woo-Seok Lee; Jeong-Uk Park; Il-Oun Lee

Phase‑shifted full‑bridge converter with coupled‑inductor‑based rectifier

Vol. 21, No. 10, pp. 1585-1599, Oct. 2021

10.1007/s43236-021-00295-9

Circulating current

Duty-cycle loss

Phase-shift full-bridge converter

Abstract

In this paper, a phase-shifted full-bridge (PSFB) converter with a coupled-inductor-based rectifier is presented. The proposed PSFB converter alleviates the circulating-current problem of conventional PSFB converters. As a result, it can operate with a larger effective duty-cycle over a wide range of input voltage or output load conditions. The transformer turn-ratio can be better designed in terms of the primary-side conduction loss and the secondary-rectifier voltage stress. Due to the reduced secondary voltage stress, diodes with a lower forward-voltage drop can be used in the rectifier of the proposed converter, which results in s reduction of the secondary-side conduction and snubber losses. With these advantages, the proposed converter can achieve a higher power-conversion efficiency when compared to conventional converters. To verify the effectiveness of the proposed converter, this paper presents the operating principle, dc analysis, and experimental results of a prototype converter built with the specification of a 1.0 kW, 300–400 V input, a 50 V output, and a 100 kHz switching frequency.

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Cite this article

[IEEE Style]

B. Choi, W. Lee, J. Park, I. Lee, "Phase‑shifted full‑bridge converter with coupled‑inductor‑based rectifier," Journal of Power Electronics, vol. 21, no. 10, pp. 1585-1599, 2021. DOI: 10.1007/s43236-021-00295-9.

[ACM Style]

Byoung-Gi Choi, Woo-Seok Lee, Jeong-Uk Park, and Il-Oun Lee. 2021. Phase‑shifted full‑bridge converter with coupled‑inductor‑based rectifier. Journal of Power Electronics, 21, 10, (2021), 1585-1599. DOI: 10.1007/s43236-021-00295-9.