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Performance Comparison of Ferrite and Nanocrystalline Cores for Medium-Frequency Transformer of Dual Active Bridge DC-DC Converter

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Listed:
  • Sakda Somkun

    (School of Renewable Energy and Smart Grid Technology (SGtech), Naresuan University, Phitsanulok 65000, Thailand)

  • Toshiro Sato

    (Department of Electrical and Computer Engineering, Shinshu University, Nagano 380-8553, Japan)

  • Viboon Chunkag

    (Department of Electrical and Computer Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand)

  • Akekachai Pannawan

    (School of Renewable Energy and Smart Grid Technology (SGtech), Naresuan University, Phitsanulok 65000, Thailand)

  • Pornnipa Nunocha

    (School of Renewable Energy and Smart Grid Technology (SGtech), Naresuan University, Phitsanulok 65000, Thailand)

  • Tawat Suriwong

    (School of Renewable Energy and Smart Grid Technology (SGtech), Naresuan University, Phitsanulok 65000, Thailand)

Abstract

This article reports an investigation into ferrite and nanocrystalline materials for the medium-frequency transformer of a dual active bridge DC-DC converter, which plays a key role in the converter’s efficiency and power density. E65 MnZn ferrite cores and toroidal and cut nanocrystalline cores are selected for the construction of 20-kHz transformers. Transformer performance is evaluated with a 1.1-kW (42–54 V)/400 V dual active bridge DC-DC converter with single-phase shift and extended phase shift modulations. The experimental results indicate that the toroidal nanocrystalline transformer had the best performance with an efficiency range of 98.5–99.2% and power density of 12 W/cm 3 , whereas the cut-core nanocrystalline transformer had an efficiency range of 98.4–99.1% with a power density of 9 W/cm 3 , and the ferrite transformer had an efficiency range of 97.6–98.8% with a power density of 6 W/cm 3 . A small mismatch in the circuit parameters is found to cause saturation in the nanocrystalline toroidal core, due to its high permeability. The analytical and experimental results suggest that cut nanocrystalline cores are suitable for the dual active bridge DC-DC converter transformers with switching frequencies up to 100 kHz.

Suggested Citation

  • Sakda Somkun & Toshiro Sato & Viboon Chunkag & Akekachai Pannawan & Pornnipa Nunocha & Tawat Suriwong, 2021. "Performance Comparison of Ferrite and Nanocrystalline Cores for Medium-Frequency Transformer of Dual Active Bridge DC-DC Converter," Energies, MDPI, vol. 14(9), pages 1-21, April.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:9:p:2407-:d:542027
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    References listed on IDEAS

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    1. Dante Ruiz-Robles & Vicente Venegas-Rebollar & Adolfo Anaya-Ruiz & Edgar L. Moreno-Goytia & Juan R. Rodríguez-Rodríguez, 2018. "Design and Prototyping Medium-Frequency Transformers Featuring a Nanocrystalline Core for DC–DC Converters," Energies, MDPI, vol. 11(8), pages 1-17, August.
    2. Marek Adamowicz & Janusz Szewczyk, 2020. "SiC-Based Power Electronic Traction Transformer (PETT) for 3 kV DC Rail Traction," Energies, MDPI, vol. 13(21), pages 1-30, October.
    3. Dante Ruiz-Robles & Jorge Ortíz-Marín & Vicente Venegas-Rebollar & Edgar L. Moreno-Goytia & David Granados-Lieberman & Juan R. Rodríguez-Rodriguez, 2019. "Nanocrystalline and Silicon Steel Medium-Frequency Transformers Applied to DC-DC Converters: Analysis and Experimental Comparison," Energies, MDPI, vol. 12(11), pages 1-16, May.
    4. Sara J. Ríos & Daniel J. Pagano & Kevin E. Lucas, 2021. "Bidirectional Power Sharing for DC Microgrid Enabled by Dual Active Bridge DC-DC Converter," Energies, MDPI, vol. 14(2), pages 1-24, January.
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    Cited by:

    1. Daniel van Niekerk & Brydon Schoombie & Pitshou Bokoro, 2023. "Design of an Experimental Approach for Characterization and Performance Analysis of High-Frequency Transformer Core Materials," Energies, MDPI, vol. 16(9), pages 1-20, May.
    2. Ismail Aouichak & Sébastien Jacques & Sébastien Bissey & Cédric Reymond & Téo Besson & Jean-Charles Le Bunetel, 2022. "A Bidirectional Grid-Connected DC–AC Converter for Autonomous and Intelligent Electricity Storage in the Residential Sector," Energies, MDPI, vol. 15(3), pages 1-19, February.

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