Influence of Power Losses in the Inductor Core on Characteristics of Selected DC–DC Converters

Górecki, Krzysztof; Detka, Kalina

doi:10.3390/en12101991

Cited by 17 publications

(10 citation statements)

References 28 publications

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“…Another alternative is the model proposed by Gorécki given by Equation ( 26 ) in [ 124 , 125 ], which includes 20 parameters. Those are divided into three groups: electrical parameters, magnetic parameters, and thermal parameters.…”

Section: General Core Losses Modelsmentioning

confidence: 99%

Power Losses Models for Magnetic Cores: A Review

et al. 2022

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In power electronics, magnetic components are fundamental, and, unfortunately, represent one of the greatest challenges for designers because they are some of the components that lead the opposition to miniaturization and the main source of losses (both electrical and thermal). The use of ferromagnetic materials as substitutes for ferrite, in the core of magnetic components, has been proposed as a solution to this problem, and with them, a new perspective and methodology in the calculation of power losses open the way to new design proposals and challenges to overcome. Achieving a core losses model that combines all the parameters (electric, magnetic, thermal) needed in power electronic applications is a challenge. The main objective of this work is to position the reader in state-of-the-art for core losses models. This last provides, in one source, tools and techniques to develop magnetic solutions towards miniaturization applications. Details about new proposals, materials used, design steps, software tools, and miniaturization examples are provided.

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Section: General Core Losses Modelsmentioning

confidence: 99%

Power Losses Models for Magnetic Cores: A Review

et al. 2022

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“…[6] proposes an electrothermal model of the inductor to analyze a boost converter; it highlights that an accurate knowledge of losses in the inductor is required. The same authors explain in [7] how losses in the inductor influence the converter performance, whereas [8] proposes a 2-D model of the inductor to reduce the computational load. Ref.…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability of a DC/DC Converter With Inductor in Partial Saturation

Vitale

Lullo

Scirè

2021

IEEE Trans. Ind. Electron.

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Inductors operated in quasi saturation in DC/DC converters allow reduction of the core size and realization costs; on the other hand, they imply an increase of dissipated power that can jeopardize the thermal stability of the converter. In this paper, this issue is studied by a mathematical model able to represent both the inductor non-linearity and its temperature dependence. The main losses, such as ohmic, skin effect and magnetic, are taken into account in the model. The inductor is characterized by a polynomial curve whose parameters are a function of the temperature. Finally, the whole converter is modeled and simulation results, obtained on a boost converter, are compared with experimental measurements showing that the thermal behavior is reproduced in detail.

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“…Different from [18], the proposed approach can be generalized for power inductors; it is cheaper compared to [22], which uses a temperature chamber, and a commercial system such as [25] and can be built for laboratory purposes. The inductor thermal behavior and modeling are relevant to the DC/DC converter and EMI filter design [23,24,[29][30][31]. Our contribution addresses this issue since the characterization always takes into account the temperature measured on the core.…”

Section: Introductionmentioning

confidence: 99%

Non-Linear Inductors Characterization in Real Operating Conditions for Power Density Optimization in SMPS

et al. 2021

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The exploitation of power inductors outside their linear region in switching converters can be achieved by raising the current until a decrease in the inductance can be noticed. This allows using a smaller magnetic core, increasing the power density of the converter. On the other hand, a detailed description of the magnetization curve including the temperature is required. Since this information is often not included in the inductor’s datasheets, this paper shows how to identify the behavior of an inductor when it is operated up to saturation and its temperature rises. In order to characterize the inductor in real operating conditions, a dedicated measurement rig was developed. It consists of a switching converter that encompasses the inductor under test and is controlled by a virtual instrument developed in LabVIEW. The characterization system was tested by retrieving the inductance and the magnetization curves vs. current for two commercial inductors at core temperatures up to 105 °C. The magnetic core was then characterized by the saturation current vs. inductance, obtaining an expression for the whole family of inductors sharing the same core. Finally, we experimentally analyzed the thermal transient of the inductors in operating conditions, confirming the fundamental role of the temperature in changing the current profiles and the core saturation condition.

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Influence of Power Losses in the Inductor Core on Characteristics of Selected DC–DC Converters

Cited by 17 publications

References 28 publications

Power Losses Models for Magnetic Cores: A Review

Power Losses Models for Magnetic Cores: A Review

Thermal Stability of a DC/DC Converter With Inductor in Partial Saturation

Non-Linear Inductors Characterization in Real Operating Conditions for Power Density Optimization in SMPS

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