Influence of Non-Linearity in Losses Estimation of Magnetic Components for DC-DC Converters

Fabio Corti, Alberto Reatti, Gabriele Maria Lozito, Ermanno Cardelli and Antonino Laudani
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Fabio Corti: Department of Engineering, University of Perugia, Via G. Duranti 67, 06125 Perugia, Italy
Alberto Reatti: Department of Information Engineering, University of Firenze, Via di Santa Marta 3, 50139 Firenze, Italy
Gabriele Maria Lozito: Department of Information Engineering, University of Firenze, Via di Santa Marta 3, 50139 Firenze, Italy
Ermanno Cardelli: Department of Engineering, University of Perugia, Via G. Duranti 67, 06125 Perugia, Italy
Antonino Laudani: Department of Industrial Engineering Electronics and Mechanics, University of Roma 3, Via Vito Volterra 62b, 00146 Roma, Italy

Energies, 2021, vol. 14, issue 20, 1-16

Abstract: In this paper, the problem of estimating the core losses for inductive components is addressed. A novel methodology is applied to estimate the core losses of an inductor in a DC-DC converter in the time-domain. The methodology addresses both the non-linearity and dynamic behavior of the core magnetic material and the non-uniformity of the field distribution for the device geometry. The methodology is natively implemented using the LTSpice simulation environment and can be used to include an accurate behavioral model of the magnetic devices in a more complex lumped circuit. The methodology is compared against classic estimation techniques such as Steinmetz Equation and the improved Generalized Steinmetz Equation. The validation is performed on a practical DC-DC Buck converter, which was utilized to experimentally verify the results derived by a model suitable to estimate the inductor losses. Both simulation and experimental test confirm the accuracy of the proposed methodology. Thus, the proposed technique can be flexibly used both for direct core loss estimation and the realization of a subsystem able to simulate the realistic behavior of an inductor within a more complex lumped circuit.

Keywords: dynamic magnetic losses; ferrite core; core losses measurement; spice equivalent circuit (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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