AN IMPROVED CUK-TYPE COUPLED-INDUCTOR BOOST CONVERTER

Sun Xingtao; Liu Taiyuan; Gao Shengwei; Liu Xueli

doi:10.19912/j.0254-0096.tynxb.2024-1481

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 234-243. DOI: 10.19912/j.0254-0096.tynxb.2024-1481

AN IMPROVED CUK-TYPE COUPLED-INDUCTOR BOOST CONVERTER

Sun Xingtao, Liu Taiyuan, Gao Shengwei, Liu Xueli

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Abstract

In this paper,an improved Cuk-type coupled-inductor DC-DC boost converter that can be applied to photovoltaic systems is proposed. On the basis of the topology of the traditional Cuk converter,a switched-capacitor boost network and a coupled-inductor dual-boost unit are added,which can not only achieve higher voltage gain, but also do not change the reverse output characteristics of the Cuk converter,reduce the voltage stress of the switch tube and absorb the leakage inductance energy through the passive clamp absorption branch formed by the switching capacitor structure,and the L-C filter unit composed of the output inductance and output capacitance of the topology post-stage can achieve zero ripple output. The theoretical operation and characteristic analysis of the converter is carried out,the key device design parameters are given,the working performance of different boost topologies is compared,and a 100 W experimental prototype is produced to verify the theoretical correctness in combination with the theoretical design.

Key words

DC-DC converters / coupled inductors / zero voltage switch / Cuk converter / zero ripple output

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Sun Xingtao, Liu Taiyuan, Gao Shengwei, Liu Xueli. AN IMPROVED CUK-TYPE COUPLED-INDUCTOR BOOST CONVERTER[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 234-243 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1481

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