نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی برق، دانشگاه محقق اردبیلی، اردبیل، ایران
2 گروه مهندسی برق، دانشکده فنی مهندسی- دانشگاه محقق اردبیلی- اردبیل- ایران
3 گروه مهندسی برق، دانشگاه محقق اردبیلی، اردبیل، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This paper proposes a 17-level switched-capacitor inverter with an eightfold voltage boosting capability and a soft-charging mechanism. A key challenge in existing 17-level structures is achieving high voltage gain, low device count, low voltage stress, and inrush current limitation at the same time. The proposed topology employs 10 switches, 5 diodes, and 5 capacitors, reducing the number of gate drivers and control complexity while minimising required heat sinks. Only five independent control signals are needed to drive five switch pairs. The main novelty is a single-source 17-level inverter with eightfold voltage gain and soft charging using only one small shared inductor. By using an appropriate charging sequence and a small inductor in the common capacitor-charging path, the inrush current is effectively limited, and the capacitor-charging process becomes soft without requiring an inductor bypass diode, multiple inductors, or auxiliary external units. These features reduce voltage and current stresses on components, improve reliability, and decrease overall system cost. The topology is designed so that the total standing voltage (TSV) is limited to 5.8Vmax, indicating reduced device voltage ratings; moreover, only two components withstand the maximum output voltage. Operating principles, capacitor sizing, soft-charging analysis, and loss calculations are presented, along with a comprehensive comparison with similar structures for voltage gain, component count, voltage stress, and inrush current. Simulation (MATLAB/Simulink) at 530 W, and both steady-state and dynamic experimental tests, validate the effectiveness of the proposed inverter under different load conditions and modulation indices.
کلیدواژهها [English]
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