In this article, two high step-down bridgeless power factor correction rectifiers based on the switched inductor network (SIN) are introduced. The proposed rectifiers employ the SIN to provide high step-down voltage gain with a higher duty cycle than the competitors. They also offer higher efficiency, lower current stress, and total peak switching device powers. A thorough and straightforward design algorithm in the discontinuous conduction mode is provided that ensures a unity power factor and a low total harmonic distortion with a simple control scheme. As a demonstration of the superior performance of the proposed rectifiers, a 300-W high-gain sepic rectifier setup with 48Vdc output voltage from a 230Vrms/50Hz source is built in the laboratory.

中文翻译：

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高降压无桥 Sepic/Cuk PFC 整流器，提高效率并降低电流应力


本文介绍了两种基于开关电感网络（SIN）的高降压无桥功率因数校正整流器。所提出的整流器采用 SIN 来提供高降压电压增益，并具有比竞争对手更高的占空比。它们还提供更高的效率、更低的电流应力和总峰值开关器件功率。提供了一种在不连续导通模式下彻底且简单的设计算法，通过简单的控制方案确保单位功率因数和低总谐波失真。为了展示所提出的整流器的卓越性能，我们在实验室中构建了一个 300W 高增益 sepic 整流器装置，其输出电压为 230Vrms/50Hz 电源的 48Vdc。