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<p>This article discusses a novel multilevel inverter (MLI) topology for voltage boosting, making it particularly advantageous for small-scale photovoltaic (PV) systems. The suggested inverter topology is based on a switched capacitor MLI, which minimises the number of switches and DC sources while producing high-quality output voltage. The key novelty of the suggested MLI lies in its minimalist design, utilizing only a single DC source, two capacitors, two diodes, and eight switches. For a proper control strategy, the PD-PWM (pulse width modulation) method and fundamental switching have been applied for generating pulses for the proposed MLI. The circuit operates through a systematic switching sequence to generate nine distinct output voltage levels with a gain of four times the input DC source. A nine-level MLI has been simulated and experimentally validated, demonstrating a reduction in total harmonic distortion. A comprehensive and rigorous analysis based on state-of-the-art technology has been conducted. The average efficiency of the proposed topology achieves 97.33%. The proposed inverter's effectiveness is rigorously validated through a physical laboratory prototype built using a dSPACE-1103 controller. Finally, results from both the simulation and experiment demonstrate excellent agreement, confirming the effectiveness, robustness, and practical feasibility of the topology.</p>

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Design and analysis of a compact boost nine-level switched capacitor inverter with minimal component count

  • 期刊论文

  • 发表日期：

    2026年6月30日

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  • A. Sangari,
  • A. Umamageswari,
  • J. Anto Sheeba,
  • D. Sivamani

摘要

This article discusses a novel multilevel inverter (MLI) topology for voltage boosting, making it particularly advantageous for small-scale photovoltaic (PV) systems. The suggested inverter topology is based on a switched capacitor MLI, which minimises the number of switches and DC sources while producing high-quality output voltage. The key novelty of the suggested MLI lies in its minimalist design, utilizing only a single DC source, two capacitors, two diodes, and eight switches. For a proper control strategy, the PD-PWM (pulse width modulation) method and fundamental switching have been applied for generating pulses for the proposed MLI. The circuit operates through a systematic switching sequence to generate nine distinct output voltage levels with a gain of four times the input DC source. A nine-level MLI has been simulated and experimentally validated, demonstrating a reduction in total harmonic distortion. A comprehensive and rigorous analysis based on state-of-the-art technology has been conducted. The average efficiency of the proposed topology achieves 97.33%. The proposed inverter's effectiveness is rigorously validated through a physical laboratory prototype built using a dSPACE-1103 controller. Finally, results from both the simulation and experiment demonstrate excellent agreement, confirming the effectiveness, robustness, and practical feasibility of the topology.