基于能量前馈的软开关Buck变换器研究

张强; 陈俊龙; 林艺鹏; 张达敏; 郑雪钦

doi:10.19912/j.0254-0096.tynxb.2025-0765

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基于能量前馈的软开关Buck变换器研究

更新时间：2026-10-15

- 基于能量前馈的软开关Buck变换器研究
- 基于能量前馈的软开关Buck变换器研究
- 太阳能学报 2026年47卷第9期页码：567-577
- 作者机构：
- 作者简介：
- 基金信息：
  
  福建省自然科学基金（2022J011257）;厦门市自然科学基金（3502Z20227216）;国家自然科学基金（52377188）
- DOI：10.19912/j.0254-0096.tynxb.2025-0765
  中图分类号： TM131
- 网络首发：2026-10-10，
  
  纸质出版：2026
- 稿件说明：
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张强, 陈俊龙, 林艺鹏, 等. 基于能量前馈的软开关Buck变换器研究[J]. 太阳能学报, 2026,47(9):567-577.

张强, 陈俊龙, 林艺鹏, et al. 基于能量前馈的软开关Buck变换器研究[J]. 2026, 47(9): 567-577.
张强, 陈俊龙, 林艺鹏, 等. 基于能量前馈的软开关Buck变换器研究[J]. 太阳能学报, 2026,47(9):567-577. DOI： 10.19912/j.0254-0096.tynxb.2025-0765.

张强, 陈俊龙, 林艺鹏, et al. 基于能量前馈的软开关Buck变换器研究[J]. 2026, 47(9): 567-577. DOI： 10.19912/j.0254-0096.tynxb.2025-0765.

摘要

从功率传输的路径出发

提出一种低应力的能量前馈型软开关Buck变换器

谐振能量通过高频变压器直接传输到负载侧

而非返回电源或间接传输至负载

以此来减小谐振能量的环流导通损耗。辅助软开关网络由一个开关管、两个二极管以及一个高频变压器组成

包括辅助网络在内的所有开关管和二极管均能完成软开关工作

同时不会增大原功率电路器件的电压电流应力。首先详细分析所提方案的软开关工作原理

接着对关键参数进行理论分析和仿真验证

最后构建一台开关频率为200 kHz、输出功率为200 W的实验样机。实验结果表明

在10%到额定负载范围内

所有开关器件均能完成软开关工作

与传统的硬开关Buck变换器进行效率对比

软开关Buck在整个负载测试范围内均具有更高的效率

轻载时尤为明显

满载时的效率从93.68%提升到96.53%。

Abstract

This paper proposes a low-stress energy feedforward soft-switching Buck converter from the perspective of the power transmission path. The resonant energy is directly transferred to the load side through a high-frequency transformer

rather than being returned to the power source or indirectly delivered to the load

thereby reducing conduction losses caused by resonant energy circulation. The auxiliary soft-switching network consists of one switching device

two diodes

and a high-frequency transformer. All switching devices and diodes

including those in the auxiliary network

achieve soft-switching operation without increasing the voltage or current stress on the original power circuit components. First

the soft-switching operating principles of the proposed scheme are analyzed in detail. Then

theoretical analysis and simulation verification of key parameters are conducted. Finally

a 200 kHz

200 W experimental prototype is constructed. Test results demonstrate that all switching devices achieve soft-switching operation within a load range of 10% to full load. Compared with a conventional hard-switching Buck converter

the proposed soft-switching Buck exhibits higher efficiency across the entire load range

particularly under light-load conditions. The full-load efficiency improves from 93.68% to 96.53%.

关键词

Keywords

references

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