基于Sepic-Cuk的零纹波双极性输出直流变换器

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摘要随着光伏发电、燃料电池等新能源更多地接入电网，双极性直流微电网优势愈发显著。针对变换器输入电流纹波较大、输出增益较低等不足，研制一种基于Sepic-Cuk结构的零纹波双极性输出直流变换器。该变换器共用输入电感和开关管，将Sepic和Cuk变换器集成，并根据两种变换器输出电压增益大小相同且极性相反的特点，实现双极性对称电压输出。采用电容钳位技术抑制输入电流纹波，引入耦合电感提高输出电压以解决增益不足问题。对其展开系统性分析，阐释工作原理、分析纹波抑制机理，并针对关键参数进行工程设计。最后，研制出一台额定功率130 W、开关频率为100 kHz、输入电压为40 V且总输出电压为360 V（±180 V）的实验样机。实验样机的各输出电压实测值与理论计算结果基本吻合，转换效率达到96.1%，证明了该变换器的有效性与可行性。

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	陈柯旭
	林国庆

关键词 ：零纹波, 电容钳位, Sepic-Cuk, 直流变换器, 耦合电感

Abstract：With increasing integration of renewable energy sources like photovoltaics and fuel cells into power grids, bipolar DC microgrids have shown significant advantages. To overcome limitations such as high input current ripple and low voltage gain in conventional converters, a zero-ripple bipolar DC-DC converter based on a Sepic-Cuk structure is proposed. The converter combines Sepic and Cuk topologies using shared inductors and switches, achieving symmetrical bipolar output by utilizing their complementary voltage gain characteristics. Capacitor clamping reduces input current ripple, while coupled inductors increase voltage gain. The converter is analyzed systematically, covering operating principles, ripple suppression, and key parameter design. A prototype rated at 130 W, with a switching frequency of 100 kHz, an input voltage of 40 V, and a total output voltage of 360 V (±180 V), is built and tested. The measured output voltages show close agreement with theoretical calculations, and a conversion efficiency of 96.1% is achieved, confirming the effectiveness and feasibility of the proposed converter.

Key words： zero ripple capacitor clamp Sepic-Cuk DC-DC converter coupled inductance

收稿日期: 2025-08-29

基金资助:晋江市福大科教园区发展中心科研项目（2019-JJFDKY-37）

作者简介: 陈柯旭（2000—），男，硕士研究生，研究方向为电力电子变流技术。

引用本文:

陈柯旭, 林国庆. 基于Sepic-Cuk的零纹波双极性输出直流变换器[J]. 电气技术, 2026, 27(2): 25-31. CHEN Kexu, LIN Guoqing. Research on zero-ripple bipolar output DC-DC converter based on Sepic-Cuk topology. Electrical Engineering, 2026, 27(2): 25-31.

链接本文:

https://dqjs.cesmedia.cn/CN/Y2026/V27/I2/25

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