Hosseinpour Majid, Derakhshandeh Masoumeh, Seifi Ali, Shahparasti Mahdi
Department of Electrical and Computer Engineering, University of Mohaghegh Ardabili, Ardabil, Iran.
School of Technology and Innovations, University of Vaasa, Vaasa, Finland.
Sci Rep. 2024 Mar 14;14(1):6233. doi: 10.1038/s41598-024-56717-8.
In this paper, a quadruple boost switched-capacitor multi-level inverter is proposed. The proposed structure utilizes a DC source, 11 switches, and a diode to achieve 17-level output voltage levels. This structure consists of three capacitors with the ability for self-balancing voltages. The capacitors achieve automatic voltage balancing through a series/parallel connection with the input voltage source. To control the switching pulses of the switches, level-shifted pulse width modulation (LS-PWM) strategy has been employed. A comparative evaluation has been performed between the proposed structure and structures presented in recent articles, considering various parameters such as voltage gain, number of DC sources, number of semiconductor devices, maximum blocking voltage (MBV), and total standing voltage (TSV). Considering this comparison, the lower number of semiconductor devices for generating a 17-level output with suitable voltage gain, and especially the cost-effectiveness of the structure, are the main advantages of the proposed configuration. In addition, a soft charging method has been employed to limit the inrush current of capacitors. Moreover, the power losses of the proposed structure have been investigated, indicating its acceptable efficiency. Finally, for the analysis and validation of the proposed structure's performance, an experimental prototype has been implemented and evaluated under various conditions. The results indicate satisfactory performance of the proposed structure under various stable and dynamic operating conditions.
本文提出了一种四重升压开关电容多电平逆变器。所提出的结构利用一个直流电源、11个开关和一个二极管来实现17电平的输出电压电平。该结构由三个具有自平衡电压能力的电容器组成。这些电容器通过与输入电压源串联/并联来实现自动电压平衡。为了控制开关的开关脉冲，采用了电平移动脉宽调制（LS-PWM）策略。考虑了电压增益、直流电源数量、半导体器件数量、最大阻断电压（MBV）和总耐压（TSV）等各种参数，对所提出的结构与近期文章中提出的结构进行了比较评估。基于此比较，以合适的电压增益生成17电平输出所需的半导体器件数量较少，尤其是该结构的成本效益，是所提出配置的主要优点。此外，采用了一种软充电方法来限制电容器的浪涌电流。而且，对所提出结构的功率损耗进行了研究，表明其效率是可接受的。最后，为了分析和验证所提出结构的性能，制作了一个实验原型，并在各种条件下进行了评估。结果表明，在所提出的结构在各种稳定和动态运行条件下均具有令人满意的性能。
