Non-linear inductor modelling for a DC/DC Buck converter

Lullo, G.; Scirè, Daniele; Vitale, G.

doi:10.24084/repqj15.433

Cited by 20 publications

(13 citation statements)

References 14 publications

(15 reference statements)

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“…The calculated relative standard deviation σ * is 0.0075; this value is obtained iterating the measuring process multiple times while maintaining the same operating conditions. By the numerical values acquired with the proposed system, it is possible to obtain a continuous function, to be used in a simulator as in [5], to reproduce the inductance behavior. In particular, the inductance versus the current can be approximated by a 5 th order polynomial function as shown in Figure 12, whereas the inductance versus temperature curve shows a linear trend as sketched in Figure 13.…”

Section: Resultsmentioning

confidence: 99%

“…This issue is of great interest both for scientists and industry due to economic reasons tied both to the initial cost of the converter and to the reduced payback time of the equipment [1]. The value of the inductor in power converters is often considered constant with the current both for static and State Space Averaging analysis [2,3]; recently some papers dealing with the use of inductors working in partial saturation [4][5][6][7] have been published. In [8,9] the thermal model has been considered as well.…”

Section: Introductionmentioning

confidence: 99%

“…In [13] is shown that every global model of inductance saturation curve, which involves a large-amplitude current ripple condition, is associated with a specific inductor temperature. The authors have proposed an inductance measurement system by varying only the current level in [5] and [14]. In this contribution, the system is improved to match the simulation and the experimental data including thermal effects.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Non-linear Inductors Including Thermal Effects for Power Applications

Lullo

Rosato

Scirè³

et al. 2018

REPQJ

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This paper focuses on the behavior of non-linear inductors employed in DC/DC switching converters considering the effects due to variations of both current and temperature. The characterization of the inductors is performed by a buck converter operated to stimulate the inductor under test by a constant current with superimposed a large signal. The measurements are carried out for several temperature values of the inductor. Data are automatically collected by a novel virtual instrument developed by the authors in LabVIEW ® environment, aiming to obtain a polynomial based analytical model. The deep knowledge of the inductor model allows its design to be optimized improving the power density of the converter.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of Non-linear Inductors Including Thermal Effects for Power Applications

Lullo

Rosato

Scirè³

et al. 2018

REPQJ

Self Cite

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“…The degradation parameters including the inductance and the internal resistance will decrease and increase. The end‐of‐life criteria of these two parameters are generally set as the 80% of the initial inductance value and 2 times of the initial internal resistance [32, 33].…”

Section: Simulation Experimentsmentioning

confidence: 99%

Incipient fault diagnosis method for DC–DC converters based on sensitive fault features

Jiang

Liu³

et al. 2020

IET power electron.

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DC-DC converters play an important role in electrical systems. The fault state of a DC-DC converter has a major impact on the operation of the back-end components and the entire electrical system. Therefore, the fault diagnosis is very necessary when the fault state of DC-DC is in the early stage. It can decrease the likelihood of happening the serious faults that may result in the enormous economic loss. To effectively diagnose the incipient fault in DC-DC converters, an incipient fault diagnosis method based on sensitive fault features is proposed. Firstly, for each type of the incipient fault, this study obtains the statistical features in time domain and the wavelet analysis local energy values in the frequency domain of the output. Then to further improve the incipient fault diagnosis accuracy, this study removes the redundant fault features based on overlap calculation, the unique fault features for each type of incipient fault will be selected. Finally, these sensitive fault features are used to build support vector data description models, which can diagnose the incipient faults. Simulation and hardware experimental results validate the practicability and effectiveness of the proposed method.

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“…In this paper, the inductor is modeled by a polynomial curve as in [17]. The effect of temperature has been included considering a linear dependence of the coefficients in [18], whereas in [19] the same model has been used to simulate the thermal behavior in a DC/DC converter.…”

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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Non-linear inductor modelling for a DC/DC Buck converter

Cited by 20 publications

References 14 publications

Characterization of Non-linear Inductors Including Thermal Effects for Power Applications

Characterization of Non-linear Inductors Including Thermal Effects for Power Applications

Incipient fault diagnosis method for DC–DC converters based on sensitive fault features

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

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