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.

在本文中，介绍了一种带有基于耦合电感的整流器的移相全桥 (PSFB) 转换器。所提出的 PSFB 转换器减轻了传统 PSFB 转换器的循环电流问题。因此，它可以在较宽的输入电压或输出负载条件范围内以更大的有效占空比运行。从初级侧传导损耗和次级整流器电压应力方面可以更好地设计变压器匝数比。由于次级电压应力降低，具有较低正向压降的二极管可用于建议转换器的整流器，从而降低次级侧传导和缓冲器损耗。凭借这些优势，与传统转换器相比，所提出的转换器可以实现更高的功率转换效率。