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Ebrahimzadeh, Soghra, Sedaghati, Farzad, Dolati, Hadi. (1405). Two Improved Topologies for Switched-Capacitor Multilevel Inverters. فناوری آموزش, 14(1), 23-32. doi: 10.22061/jecei.2025.11423.801
Soghra Ebrahimzadeh; Farzad Sedaghati; Hadi Dolati. "Two Improved Topologies for Switched-Capacitor Multilevel Inverters". فناوری آموزش, 14, 1, 1405, 23-32. doi: 10.22061/jecei.2025.11423.801
Ebrahimzadeh, Soghra, Sedaghati, Farzad, Dolati, Hadi. (1405). 'Two Improved Topologies for Switched-Capacitor Multilevel Inverters', فناوری آموزش, 14(1), pp. 23-32. doi: 10.22061/jecei.2025.11423.801
Ebrahimzadeh, Soghra, Sedaghati, Farzad, Dolati, Hadi. Two Improved Topologies for Switched-Capacitor Multilevel Inverters. فناوری آموزش, 1405; 14(1): 23-32. doi: 10.22061/jecei.2025.11423.801

Two Improved Topologies for Switched-Capacitor Multilevel Inverters

Journal of Electrical and Computer Engineering Innovations (JECEI)
مقاله 3، دوره 14، شماره 1، مهر 2026، صفحه 23-32    اصل مقاله (1.75 M)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22061/jecei.2025.11423.801
نویسندگان
Soghra Ebrahimzadeh1؛ Farzad Sedaghati* 1؛ Hadi Dolati2
1Department of Electrical Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran.
2Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran.
تاریخ دریافت: 14 دی 1403،  تاریخ بازنگری: 29 فروردین 1404،  تاریخ پذیرش: 08 اردیبهشت 1404 
چکیده
Background and Objectives: To achieve zero carbon emissions, renewable energy sources have gained noteworthy regard due to their dependable performance, cost efficiency, and adaptability within systems. Increasing adoption of renewable energy sources and electric vehicle (EV) has led to a growing need for enhanced voltage boost capability. Nevertheless, most of DC sources such as solar cells have a restricted capacity for boosting power. Multilevel inverters can operate as interfaces. In this study, two topologies of switched-capacitor multilevel inverters (SC-MLI) is suggested to overcome the mentioned constraints.
Methods: Each stage of the introduced SC-MLI comprises a capacitor, a DC voltage supply, a diode, and two power electronic switches. A comprehensive analysis of the operational principles, and the characteristics of the presented converter, including its charging and discharging behaviors, are provided. Furthermore, the phase-disposition pulse width modulation (PD-PWM) technique is employed to generate the output voltage waveform of the introduced multilevel SC inverter.
Results: In the recommended topologies, the quantity of semiconductor power switches, isolated DC voltage supply, diodes, and so, volume and cost of the overall system are decreased in compare to similar SC-MLI topologies. The voltage across the capacitors is self-balanced accurately without using any auxiliary circuits or closed-loop systems. To validate the proposed SC-MLI's effective operation, the implemented topology's simulation and measurement results are presented. The total harmonic distortion for the 17-level inverter using the PD-PWM technique at a modulation index 1 obtained 6.97%.
Conclusion: Comprehensive comparative analysis reveals that the introduced topologies have merits and superior performance compared to existing solutions regarding component number, voltage boost factor (BF), and voltage stress. Also, simulation and experimental test results verify theoretical analysis.
کلیدواژه‌ها
Multilevel Inverter؛ Switched-Capacitor, Self-Balancing؛ Boost factor
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