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A Common-Ground Bidirectional Hybrid Switched-Capacitor DC–DC Converter with a High Voltage Conversion Ratio

Author

Listed:
  • Mihaiță Gireadă

    (Electrical Engineering Department, Politehnica University Timișoara, 300223 Timișoara, Romania)

  • Dan Hulea

    (Electrical Engineering Department, Politehnica University Timișoara, 300223 Timișoara, Romania
    Romanian Academy—Timișoara Branch, 300223 Timișoara, Romania)

  • Nicolae Muntean

    (Electrical Engineering Department, Politehnica University Timișoara, 300223 Timișoara, Romania
    Romanian Academy—Timișoara Branch, 300223 Timișoara, Romania)

  • Octavian Cornea

    (Electrical Engineering Department, Politehnica University Timișoara, 300223 Timișoara, Romania)

Abstract

Electrical energy conversion and storage in DC systems, with increasing importance in industry, requires DC–DC power electronic converters with performances adapted to today’s requirements. In recent years, the applications of DC–DC converters have expanded, including energy storage management strategies, due to the use of supercapacitors for energy storage instead of—or together with—rechargeable batteries, in order to improve overall performance. This article presents a non-isolated, common-ground, bidirectional hybrid switched-capacitor DC–DC converter, which can be efficiently used for supercapacitor charging/discharging, due to its high voltage conversion ratio. The hybrid converter was obtained from the conventional bidirectional buck topology, inserting an “active” switched-capacitor cell. In addition to the high voltage conversion ratio, the switched-capacitor cell brings another important advantage: decreasing the values of all passive components without interrupting the input to the output ground path. All of these positive features were revealed through theoretical analysis and confirmed through digital simulations and experiments, proving that the hybrid converter performs well in both operating modes, with a smooth transition between them.

Suggested Citation

  • Mihaiță Gireadă & Dan Hulea & Nicolae Muntean & Octavian Cornea, 2023. "A Common-Ground Bidirectional Hybrid Switched-Capacitor DC–DC Converter with a High Voltage Conversion Ratio," Energies, MDPI, vol. 16(3), pages 1-25, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:3:p:1337-:d:1048003
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    References listed on IDEAS

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