LAPSE:2023.33284
Published Article
LAPSE:2023.33284
Identification of DC Thermal Steady-State Differential Inductance of Ferrite Power Inductors
April 21, 2023
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.
Keywords
DC–DC converters, ferrite cores, saturable inductors
Suggested Citation
Musumeci S, Solimene L, Ragusa CS. Identification of DC Thermal Steady-State Differential Inductance of Ferrite Power Inductors. (2023). LAPSE:2023.33284
Author Affiliations
Musumeci S: Dipartimento Energia “G. Ferraris”, Politecnico di Torino, 10129 Torino, Italy [ORCID]
Solimene L: Dipartimento Energia “G. Ferraris”, Politecnico di Torino, 10129 Torino, Italy [ORCID]
Ragusa CS: Dipartimento Energia “G. Ferraris”, Politecnico di Torino, 10129 Torino, Italy [ORCID]
Journal Name
Energies
Volume
14
Issue
13
First Page
3854
Year
2021
Publication Date
2021-06-26
Published Version
ISSN
1996-1073
Version Comments
Original Submission
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PII: en14133854, Publication Type: Journal Article
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LAPSE:2023.33284
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doi:10.3390/en14133854
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Apr 21, 2023
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