Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Triple two-level inverter with high DC-voltage conversion ratio and capacitor voltage self-balancing

  • Bihua Hu (School of Automation and Electronic Information, Xiangtan University) ;
  • Mengzhou Zhang (School of Automation and Electronic Information, Xiangtan University) ;
  • Bumin Meng (School of Automation and Electronic Information, Xiangtan University) ;
  • Zhi Zhang (College of Electronic Engineering, Dongguan University of Technology) ;
  • Jinqing Linghu (School of Mechanical and Electrical Engineering, Guizhou Normal University) ;
  • Huabing Rao (ROYPOW Technology Co., Ltd)
  • Received : 2023.04.24
  • Accepted : 2023.12.07
  • Published : 2024.05.20
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Abstract

Currently, many inverters employ inductors to boost the AC voltage. However, this leads to increased current distortion and limits the voltage boosting capability of the inverter. To address the above issue, a triple two-level inverter is proposed in this paper. The proposed inverter adopts a switched-capacitor boost circuit to boost the AC output voltage and to generate a multi-level voltage. Simultaneously, a three-phase full-bridge circuit is assigned to convert the DC voltage into AC voltage. In addition, a novel space vector modulation strategy is introduced to achieve capacitor voltage self-balance. Finally, simulation and experimental platforms have been established to verify the effectiveness of proposed inverter. The obtained results show that the proposed inverter meets the requirements for the expected inverter.

Keywords

Acknowledgement

This work was supported in part by Natural Science Foundation of China under Grant 62003288, and in part by the Guangdong Basic and Applied Basic Research Foundation under Grant 2022A1515140009 , in part by Science and Technology Research Project of Guizhou Province under Grant Qiankehe Basic-Z.K[2022]General 177, in part by the Science and Technology Innovation Program of Hunan Province under Grant 2022GK2050, in part by the Excellent Youth Program of Education Department under Project 21B0124, in part by the Key R&D projects in Hunan Province under Project 2023GK2030 and in part by China Postdoctoral Science Foundation 2022M712673.

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