Design and implementation of a bidirectional dc-dc forward/flyback converter with leakage energy recycled

2017 Asian Conference on Energy, Power and Transportation Electrification (ACEPT) Pub Date : 2017-12-05 DOI:10.1109/ACEPT.2017.8168572

Yi-Ju Lu, Cisheng Lin, Kai-Hui Chen

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引用次数: 6

Abstract

A bidirectional interleaved forward-flyback DC-DC converter with leakage energy recycled is proposed in this paper. The proposed converter uses two transformers to reduce the current stress on the power components to reduce the conduction loss and improve the efficiency. When the proposed converter is operated in the step-up mode, the voltage across switches is clamped at the input voltage, and the leakage energy is recycled to the voltage source. When the proposed converter is operated in the step-down mode, the voltage of switches is clamped at the input voltage, and the leakage energy is recycled to the clamping capacitor or the voltage source. As the proposed converter is based on flyback converter, it is characterized with simple structure. Since the leakage inductance energy is recycled, the conversion efficiency is improved compared to conventional flyback converter. Finally, a laboratory prototype circuit with 200 V/24 V and output power 500 W is implemented to verify the feasibility of the proposed converter. The highest efficiency in the step-up and step-down stage is 92.3% and 95.5% respectively.

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泄漏能量回收的双向dc-dc正激/反激变换器的设计与实现

提出了一种泄漏能量回收的双向交错正反激DC-DC变换器。本文提出的变换器采用两个变压器来减小功率元件上的电流应力，从而降低导通损耗，提高效率。当所提出的变换器在升压模式下工作时，开关间的电压被箝位在输入电压处，泄漏能量被回收到电压源。当所提出的变换器在降压模式下工作时，开关电压被箝位在输入电压处，泄漏能量被回收到箝位电容器或电压源。该变换器基于反激变换器，结构简单。由于漏感能量被回收，与传统的反激变换器相比，提高了转换效率。最后，设计了一个200v / 24v输出功率500w的实验室原型电路，验证了该变换器的可行性。升压和降压阶段效率最高，分别为92.3%和95.5%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2017 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)

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