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Transformerless Partial Power AC-Link Step-Down Converter

Author

Listed:
  • Rodrigo A. Bugueño

    (Department of Electronics, Universidad Técnica Federico Santa María, Valparaíso 2390123, Chile
    These authors contributed equally to this work.)

  • Hugues Renaudineau

    (Department of Electronics, Universidad Técnica Federico Santa María, Valparaíso 2390123, Chile
    Advanced Center for Electrical and Electronic Engineering, Valparaíso 2390123, Chile
    These authors contributed equally to this work.)

  • Ana M. Llor

    (Department of Electronics, Universidad Técnica Federico Santa María, Valparaíso 2390123, Chile
    Electronics Engineering Department, Université de Toulouse, LAPLACE, 31062 Toulouse, France
    These authors contributed equally to this work.)

  • Christian A. Rojas

    (Department of Electronics, Universidad Técnica Federico Santa María, Valparaíso 2390123, Chile
    Advanced Center for Electrical and Electronic Engineering, Valparaíso 2390123, Chile)

Abstract

DC–DC power converters are essential for various applications, including photovoltaic systems, green hydrogen production, battery charging, and DC microgrids. Partial Power Converters (PPC) are notable for their efficiency, processing only a fraction of total power and reducing conversion losses, but this performance is overshadowed by the high cost of its construction, associated with high-frequency transformers (HFT). This paper introduces a transformerless partial power AC-link step-down converter, eliminating the need for an HFT and reducing costs while improving power density. An experimental validation using a reduced-scale prototype demonstrates the converter’s operation with a peak efficiency of 93.2% and overall efficiency above 92%, demonstrating the experimental viability of the converter. The proposed AC-link seen as a two-port network is shown to be very attractive for DC–DC step-down operations, and as a possible replacement of traditional PPC.

Suggested Citation

  • Rodrigo A. Bugueño & Hugues Renaudineau & Ana M. Llor & Christian A. Rojas, 2024. "Transformerless Partial Power AC-Link Step-Down Converter," Mathematics, MDPI, vol. 12(13), pages 1-15, June.
  • Handle: RePEc:gam:jmathe:v:12:y:2024:i:13:p:1939-:d:1420181
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    References listed on IDEAS

    as
    1. Humam Al-Baidhani & Fabio Corti & Alberto Reatti & Marian K. Kazimierczuk, 2023. "Robust Sliding-Mode Control Design of DC-DC Zeta Converter Operating in Buck and Boost Modes," Mathematics, MDPI, vol. 11(17), pages 1-17, September.
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