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Capacitor-assisted active-switched quasi-Z-source inverters with high voltage gain

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Abstract

This paper presents a novel topology called the capacitor-assisted active-switched quasi Z-source inverter (CA/AS-qZSI). The proposed CA/AS-qZSI topology has a high ac voltage gain and low voltage and current stresses on the diodes and extra switch in the Z-network. The design guide of the passive elements used in the proposed topology and a comparative study of the proposed CA/AS-qZSI and four other topologies with an active-switched impedance network are addressed. A new pulse-width modulation (PWM) technique using a sawtooth carrier signal is also suggested to reduce the switching losses of the diodes and switches. Compared with the traditional simple boost control method, the efficiency of CA/AS-qZSI using the new PWM technique is improved by 4–4.6%. The experimental results utilizing a prototype made in the laboratory demonstrate the performance of the proposed CA/AS-qZSI and PWM technique.

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Authors and Affiliations

  1. Department of Electrical Engineering, University of Ulsan, Ulsan, Republic of Korea

    Anh-Tuan Huynh & Tae-Won Chun

  2. School of Engineering, Eastern International University, Binh Duong, Vietnam

    Anh-Vu Ho

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  1. Anh-Tuan Huynh
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  2. Anh-Vu Ho
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  3. Tae-Won Chun
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Correspondence to Tae-Won Chun.

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Huynh, AT., Ho, AV. & Chun, TW. Capacitor-assisted active-switched quasi-Z-source inverters with high voltage gain. J. Power Electron. 22, 2016–2024 (2022). https://doi.org/10.1007/s43236-022-00536-5

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  • DOI: https://doi.org/10.1007/s43236-022-00536-5

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