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Elizondo Martínez, David

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https://academica-e.unavarra.es/handle/2454/48948

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Elizondo Martínez

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David

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Ingeniería Eléctrica, Electrónica y de Comunicación

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ISC. Institute of Smart Cities

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0000-0002-6993-0631

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811410

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2020 - 20233
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Subject: Winding loss ×

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Now showing 1 - 3 of 3
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    PublicationOpen Access
    Analytical modeling of high-frequency winding loss in round-wire toroidal inductors
    (IEEE, 2020) Elizondo Martínez, David; Barrios Rípodas, Ernesto; Sanchis Gúrpide, Pablo; Ursúa Rubio, Alfredo; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren
    Toroidal inductors are present in many different industrial applications, thus, still receive researchers' attention. AC winding loss in these inductors have become a major issue in the design process, since switching frequency is being continuously increased in power electronic converters. Finite element analysis software or analytical models such as Dowell's are the main existing alternatives for their calculation. However, the first one employs too much time if different designs are to be evaluated and the second one lacks accuracy when applied to toroidal inductor windings. Looking for an alternative that overcomes these drawbacks, this paper proposes an accurate, easy-to-use analytical model, specifically formulated for calculating high-frequency winding loss in round-wire toroidal inductors.
  • Thumbnail Image
    PublicationOpen Access
    Analytical modeling of high-frequency winding loss in round-wire toroidal inductors
    (IEEE, 2023) Elizondo Martínez, David; Barrios Rípodas, Ernesto; Ursúa Rubio, Alfredo; Sanchis Gúrpide, Pablo; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
    Toroidal inductors are used in many industrial applications in which they are key components regarding cost and volume. In the inductor design process, it is paramount to accurately estimate its high-frequency winding loss. Finite-element analysis (FEA) software and analytical models can be used for this purpose. However, the former employs too much time and the latter lacks accuracy when applied to toroidal windings, leading to an overestimation that can exceed 200%. As a consequence, designers would benefit from a reliable method to calculate high-frequency loss in toroidal windings. This article proposes an analytical model that considers the 2-D characteristic of the magnetic field and the geometrical particularities of toroidal windings. Furthermore, it provides an easy-to-use method, which avoids the unaffordable computational cost of FEA software. Simulations and experimental measurements are carried out for seven toroidal power inductors, from 10 Hz up to 200 kHz. Three different well-known state-of-the-art analytical models are used for comparison purposes. The results obtained with the proposed model are in good agreement with those from FEA and the experiments. The proposed model shows a maximum deviation below 20% while the overestimation of the existing analytical methods reaches values from 93% to 226%.
  • Thumbnail Image
    PublicationOpen Access
    Toroidal inductor design in multilevel DC-DC electric vehicle battery charger including high-frequency effects
    (IEEE, 2022) Elizondo Martínez, David; Barrios Rípodas, Ernesto; Sanchis Gúrpide, Pablo; Ingeniería Eléctrica, Electrónica y de Comunicación; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
    Inductor filters, such as the ones implemented in DC-DC buck-boost converters for electric vehicle chargers, have a major impact on the converter weight, volume and cost. Thus, their design is key in order to obtain an optimal design of the whole converter. This paper proposes a design methodology for powder core toroidal inductors, which is based on a holistic approach of the design of the inductor, where losses due to highfrequency effects are computed by means of specific loss model for toroidal windings, and saturation, geometrical and thermal constraints are considered. The convenience of the design tool is shown through an analysis over a wide variation of parameters, including converter topology, parallelization, switching frequency and inductance. The analysis demonstrates the relevance of high-frequency effects on the inductor design, so certain misconceptions can be avoided, such as that the inductor volume monotonically decreases when the inductance value is decreased or that paralleling inductors always results in more compact designs. A design example is presented for a 15-kW, three-level electric vehicle battery charger. The algorithm is used to obtain an optimal design of the converter, including the inductors and SiC MOSFET devices. Finally, an easy method to obtain a commercial inductor design from the theoretical one provided by the algorithm is presented.