Three‑phase three‑level boost inverter with self‑balanced capacitor voltage

Conventional multi-level inverters such as neutral point clamped and flying capacitor inverters do not have boosting capability and self-balanced capacitor voltage. Thus, in this paper, we propose a novel three-level inverter based on switched capacitors to solve the above problems. The proposed inverter has lower voltage stress than the general switched-capacitor multi-level inverter. Meanwhile, an improved modulation strategy is adopted in the proposed inverter. The three-level space vector diagram is converted into a two-level one, and the space vector modulation is simplified. Then, we analyze the power loss and design guidelines for the device in the inverter. Finally, a corresponding simulation and an experimental platform will be established to verify the feasibility of the proposed inverter. The results prove that the proposed three-level inverter has good performance and dynamic response that meets the requirements.

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Cite this article

[IEEE Style]

B. Hu, H. Yan, Z. Zhang, J. Linghu, Y. Liao, X. Long, "Three‑phase three‑level boost inverter with self‑balanced capacitor voltage," Journal of Power Electronics, vol. 24, no. 11, pp. 1707-1718, 2024. DOI: 10.1007/s43236-024-00837-x.

[ACM Style]

Bihua Hu, Han Yan, Zhi Zhang, Jinqing Linghu, Yuqing Liao, and Xiafei Long. 2024. Three‑phase three‑level boost inverter with self‑balanced capacitor voltage. Journal of Power Electronics, 24, 11, (2024), 1707-1718. DOI: 10.1007/s43236-024-00837-x.