A Coupled Inductor Coil Z-Source Inverter for Photovoltaic-Assisted Charging of Hilly Electric Agricultural Machinery

Yunzhong Dai; Shuangqiang Zhu; Wang Yi; Yuhan Xie; Shiyi Liu; Kangle Guo; Teng Ma

doi:10.54097/k060mh20

Authors

Yunzhong Dai Intelligent Manufacturing Institute, Yibin Vocational and Technical College, Yibin 644100, China; Department of Industrial Mining and Architecture, Bijie Vocational and Technical College, Bijie 551700, China
Shuangqiang Zhu School of Mechanical Engineering, Xihua University, Chengdu 610039, China
Wang Yi School of Mechanical Engineering, Xihua University, Chengdu 610039, China
Yuhan Xie School of Mechanical Engineering, Xihua University, Chengdu 610039, China
Shiyi Liu Intelligent Manufacturing Institute, Yibin Vocational and Technical College, Yibin 644100, China
Kangle Guo Intelligent Manufacturing Institute, Yibin Vocational and Technical College, Yibin 644100, China
Teng Ma School of Mechanical Engineering, Xihua University, Chengdu 610039, China

DOI:

https://doi.org/10.54097/k060mh20

Keywords:

Coupled inductor coil Z-source inverter; hilly electric agricultural machinery; photovoltaic charging; leakage current.

Abstract

The coupled inductor coil Z-source inverter has advantages such as continuous input current and good boost performance. However, the traditional quasi-Z-source inverter not only requires a bulky isolation transformer but also suffers from large high-frequency common-mode leakage current. To address these drawbacks, this paper first proposes a coupled inductor coil Z-source inverter topology for photovoltaic-assisted charging of hilly electric agricultural machinery. Secondly, the high-frequency common-mode leakage current suppression mechanism of the inverter is analysed. Then, a detailed comparison is made between the proposed inverter and the traditional quasi-Z-source inverter. The research shows that the proposed inverter not only effectively suppresses high-frequency common-mode leakage current without the need for a bulky isolation transformer, but also requires only one magnetic core and one capacitor, which can effectively reduce the weight and volume of the inverter and lower its cost. Finally, the correctness of the inverter design and theoretical analysis is verified by circuit simulation.

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References

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