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Modular SEPIC-Based Isolated dc–dc Converter with Reduced Voltage Stresses across the Semiconductors

Author

Listed:
  • Marcos Vinicius Mosconi Ewerling

    (Department of Electrical and Electronic Engineering, Federal University of Santa Catarina, Florianopolis 88040-900, Brazil)

  • Telles Brunelli Lazzarin

    (Department of Electrical and Electronic Engineering, Federal University of Santa Catarina, Florianopolis 88040-900, Brazil)

  • Carlos Henrique Illa Font

    (Department of Electronics Engineering, Federal University of Technology—Parana, Ponta Grossa 84017-220, Brazil)

Abstract

This paper presents the theoretical analysis, experimental results and generalized structure for N modules of an isolated dc–dc SEPIC converter. The structure comes from the integration of N conventional SEPIC converters based on the input-series and output-parallel connection. The main advantages provided by the proposed structure are reduced voltage stress across the semiconductors and division of the current stress in the output diodes. The proposed converter is presented in a generalized approach, varying the voltage stress across the semiconductors according to the number of modules used. As the converter uses more than one switch, the commands can be either equal or phase-shifted by 360 ∘ / N degrees. When operating with phase-shift modulation, a multilevel converter is obtained, which brings another advantage of the structure, since there is a reduction in the volume of the input inductors ( L i 1 and L i 2 ) and the output capacitor ( C o ). In this paper, the steady-state analysis, a dynamic model, system control and experimental results are presented for phase-shift modulation and discontinuous conduction mode (DCM). The performance of the proposed converter was verified in a prototype with four modules and the following specifications: 500 W output power, 800 V input voltage, 120 V output voltage and 50 kHz switching frequency. The converter achieved 94.42% efficiency at rated power.

Suggested Citation

  • Marcos Vinicius Mosconi Ewerling & Telles Brunelli Lazzarin & Carlos Henrique Illa Font, 2022. "Modular SEPIC-Based Isolated dc–dc Converter with Reduced Voltage Stresses across the Semiconductors," Energies, MDPI, vol. 15(21), pages 1-21, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:7844-:d:950834
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    References listed on IDEAS

    as
    1. Andrea Mariscotti, 2021. "Power Quality Phenomena, Standards, and Proposed Metrics for DC Grids," Energies, MDPI, vol. 14(20), pages 1-41, October.
    2. Fatemeh Nasr Esfahani & Ahmed Darwish & Ahmed Massoud, 2022. "PV/Battery Grid Integration Using a Modular Multilevel Isolated SEPIC-Based Converter," Energies, MDPI, vol. 15(15), pages 1-25, July.
    3. C. Anuradha & N. Chellammal & Md Saquib Maqsood & S. Vijayalakshmi, 2019. "Design and Analysis of Non-Isolated Three-Port SEPIC Converter for Integrating Renewable Energy Sources," Energies, MDPI, vol. 12(2), pages 1-32, January.
    4. Tiara Freitas & João Caliman & Paulo Menegáz & Walbermark dos Santos & Domingos Simonetti, 2021. "A DCM Single-Controlled Three-Phase SEPIC-Type Rectifier," Energies, MDPI, vol. 14(2), pages 1-16, January.
    5. Andrei Blinov & Ievgen Verbytskyi & Denys Zinchenko & Dmitri Vinnikov & Ilya Galkin, 2020. "Modular Battery Charger for Light Electric Vehicles," Energies, MDPI, vol. 13(4), pages 1-21, February.
    6. Dimitra G. Kyriakou & Fotios D. Kanellos, 2022. "Optimal Operation of Microgrids Comprising Large Building Prosumers and Plug-in Electric Vehicles Integrated into Active Distribution Networks," Energies, MDPI, vol. 15(17), pages 1-26, August.
    7. Abdalkreem Kasasbeh & Burak Kelleci & Salih Baris Ozturk & Ahmet Aksoz & Omar Hegazy, 2020. "SEPIC Converter with an LC Regenerative Snubber for EV Applications," Energies, MDPI, vol. 13(21), pages 1-16, November.
    8. Jinwoo Kim & Sanghun Han & Wontae Cho & Younghoon Cho & Hyunsoo Koh, 2018. "Design and Analysis of a Repetitive Current Controller for a Single-Phase Bridgeless SEPIC PFC Converter," Energies, MDPI, vol. 12(1), pages 1-17, December.
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