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Identification of DC Thermal Steady-State Differential Inductance of Ferrite Power Inductors

Author

Listed:
  • Salvatore Musumeci

    (Dipartimento Energia “G. Ferraris”, Politecnico di Torino, 10129 Torino, Italy)

  • Luigi Solimene

    (Dipartimento Energia “G. Ferraris”, Politecnico di Torino, 10129 Torino, Italy)

  • Carlo Stefano Ragusa

    (Dipartimento Energia “G. Ferraris”, Politecnico di Torino, 10129 Torino, Italy)

Abstract

In this paper, we propose a method for the identification of the differential inductance of saturable ferrite inductors adopted in DC–DC converters, considering the influence of the operating temperature. The inductor temperature rise is caused mainly by its losses, neglecting the heating contribution by the other components forming the converter layout. When the ohmic losses caused by the average current represent the principal portion of the inductor power losses, the steady-state temperature of the component can be related to the average current value. Under this assumption, usual for saturable inductors in DC–DC converters, the presented experimental setup and characterization method allow identifying a DC thermal steady-state differential inductance profile of a ferrite inductor. The curve is obtained from experimental measurements of the inductor voltage and current waveforms, at different average current values, that lead the component to operate from the linear region of the magnetization curve up to the saturation. The obtained inductance profile can be adopted to simulate the current waveform of a saturable inductor in a DC–DC converter, providing accurate results under a wide range of switching frequency, input voltage, duty cycle, and output current values.

Suggested Citation

  • Salvatore Musumeci & Luigi Solimene & Carlo Stefano Ragusa, 2021. "Identification of DC Thermal Steady-State Differential Inductance of Ferrite Power Inductors," Energies, MDPI, vol. 14(13), pages 1-15, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:13:p:3854-:d:582819
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    Citations

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    Cited by:

    1. Gianfranco Chicco & Andrea Mazza & Salvatore Musumeci & Enrico Pons & Angela Russo, 2022. "Editorial for the Special Issue “Verifying the Targets—Selected Papers from the 55th International Universities Power Engineering Conference (UPEC 2020)”," Energies, MDPI, vol. 15(15), pages 1-8, August.
    2. Fabio Corti & Alberto Reatti & Gabriele Maria Lozito & Ermanno Cardelli & Antonino Laudani, 2021. "Influence of Non-Linearity in Losses Estimation of Magnetic Components for DC-DC Converters," Energies, MDPI, vol. 14(20), pages 1-16, October.

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