IMPROVED PULSE WIDTH MODULATION STRATEGY AND PARAMETER OPTIMIZATION DESIGN METHOD FOR SEMI-Z SOURCE INVERTER

Li Ning; Yang Jialin; Zhang Yan; Zhuo Chaoran; Zhang Changjie

doi:10.19912/j.0254-0096.tynxb.2023-1607

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (2) : 245-254. DOI: 10.19912/j.0254-0096.tynxb.2023-1607

IMPROVED PULSE WIDTH MODULATION STRATEGY AND PARAMETER OPTIMIZATION DESIGN METHOD FOR SEMI-Z SOURCE INVERTER

Li Ning¹, Yang Jialin¹, Zhang Yan², Zhuo Chaoran¹, Zhang Changjie¹

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Abstract

The Semi-Z source inverter uses fewer switching components and achieves single-stage energy conversion, making it have good application prospects. The existing modulation strategy of Semi-Z source inverters has inherent shortcomings such as high switching voltage stress and difficulty in achieving closed-loop control. In response to the above shortcomings, this article proposes a low voltage stress Semi-Z source inverter modulation strategy. By establishing a steady-state circuit model, the voltage gain and device stress characteristics of the Semi-Z source are analyzed, and the duty cycle is averaged to reduce the voltage stress of the switching device. In addition, to address the issue of large demand for passive components in Semi-Z source inverters under heavy loads and high output AC frequencies. This article provides a set of parameter optimization design methods for passive components. Finally, a 200 W experimental prototype was built based on the modulation strategy proposed in this article, verifying the correctness and comprehensive advantages of the modulation strategy and parameter design scheme proposed in this article.

Key words

inverter / pulse width modulation / circuit analysis / voltage stress / linear control

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Li Ning, Yang Jialin, Zhang Yan, Zhuo Chaoran, Zhang Changjie. IMPROVED PULSE WIDTH MODULATION STRATEGY AND PARAMETER OPTIMIZATION DESIGN METHOD FOR SEMI-Z SOURCE INVERTER[J]. Acta Energiae Solaris Sinica. 2025, 46(2): 245-254 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1607

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