HIGH GAIN QUASI-Z-SOURCE DC/DC CONVERTER WITH DOUBLE-SWITCH AND COUPLED INDUCTOR

Zhou Xuanhao; Qi Zhidong; Tang Fei; Bai Liyin; Chu Kaihui; Shen Zhaoyang

doi:10.19912/j.0254-0096.tynxb.2024-0515

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (8) : 491-497. DOI: 10.19912/j.0254-0096.tynxb.2024-0515

HIGH GAIN QUASI-Z-SOURCE DC/DC CONVERTER WITH DOUBLE-SWITCH AND COUPLED INDUCTOR

Zhou Xuanhao¹, Qi Zhidong¹, Tang Fei², Bai Liyin¹, Chu Kaihui¹, Shen Zhaoyang¹

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Abstract

A high gain quasi-Z-source DC/DC converter with double-switch and coupled inductor is proposed to output high DC voltage stably in photovoltaic, fuel cell and other new energy power generation systems. Based on traditional quasi-Z-source structure, an extra switching tube and diode are added. Coupled inductance and switching capacitance unit are used to achieve high voltage gain at lower duty cycle. The converter possesses numerous advantages, including a high voltage gain, continuous input current, reduced voltage stress on switching tubes and diodes, and common input and output. The operating principle, steady-state performance and parameter design of the converter are analyzed in detail, and compared with other quasi-Z-source high-gain DC/DC converters. Ultimately, a prototype delivering 120 W is constructed to demonstrate the validity of the theoretical analysis.

Key words

DC/DC converters / topology / coupling circuit / photovoltaic power / high gain / quasi-Z-source

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Zhou Xuanhao, Qi Zhidong, Tang Fei, Bai Liyin, Chu Kaihui, Shen Zhaoyang. HIGH GAIN QUASI-Z-SOURCE DC/DC CONVERTER WITH DOUBLE-SWITCH AND COUPLED INDUCTOR[J]. Acta Energiae Solaris Sinica. 2025, 46(8): 491-497 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0515

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