Simulation of the Saturation and Air-Gap Effects in a POT Ferrite Core With a 2-D Finite Element Model

Salas, Rosa Ana; Pleite, J.

doi:10.1109/tmag.2011.2158086

Cited by 27 publications

(7 citation statements)

References 7 publications

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“…Nevertheless, despite these publications there are not enough studies that calculate parameters to be used in circuit simulators, such as inductances in all working regions of the ferrite (linear, intermediate and saturation), geometries and number of turns. In this context, our previous publications have focused on 2D Finite Element Analysis procedures for RM and POT ferrite cores [ 13 , 14 ]. In addition, in the case of the RM core, we have shown an application of our procedures in a commercial circuit simulator [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Simple Procedure to Compute the Inductance of a Toroidal Ferrite Core from the Linear to the Saturation Regions

Salas

Pleite

2013

Materials

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We propose a specific procedure to compute the inductance of a toroidal ferrite core as a function of the excitation current. The study includes the linear, intermediate and saturation regions. The procedure combines the use of Finite Element Analysis in 2D and experimental measurements. Through the two dimensional (2D) procedure we are able to achieve convergence, a reduction of computational cost and equivalent results to those computed by three dimensional (3D) simulations. The validation is carried out by comparing 2D, 3D and experimental results.

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Section: Introductionmentioning

confidence: 99%

Simple Procedure to Compute the Inductance of a Toroidal Ferrite Core from the Linear to the Saturation Regions

Salas

Pleite

2013

Materials

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“…The considered air gaps had relatively large size in order to reduce the slope of the B(H) curve and to minimize the influence of magnetic saturation on the magnetizing inductance value. The influence of the air gap length on the equivalent magnetic permeability, magnetic reluctance and magnetizing inductance in ferrite core transformers was analysed in [35][36][37][38]. The influence on the core and winding power loss was studied in [39][40][41].…”

Section: Mft Vsc1 Vsc2mentioning

confidence: 99%

Effective Permeability of Multi Air Gap Ferrite Core 3-Phase Medium Frequency Transformer in Isolated DC-DC Converters

et al. 2020

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The magnetizing inductance of the medium frequency transformer (MFT) impacts the performance of the isolated dc-dc power converters. The ferrite material is considered for high power transformers but it requires an assembly of type “I” cores resulting in a multi air gap structure of the magnetic core. The authors claim that the multiple air gaps are randomly distributed and that the average air gap length is unpredictable at the industrial design stage. As a consequence, the required effective magnetic permeability and the magnetizing inductance are difficult to achieve within reasonable error margins. This article presents the measurements of the equivalent B(H) and the equivalent magnetic permeability of two three-phase MFT prototypes. The measured equivalent B(H) is used in an FEM simulation and compared against a no load test of a 100 kW isolated dc-dc converter showing a good fit within a 10% error. Further analysis leads to the demonstration that the equivalent magnetic permeability and the average air gap length are nonlinear functions of the number of air gaps. The proposed exponential scaling function enables rapid estimation of the magnetizing inductance based on the ferrite material datasheet only.

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“…Anyway, this jeopardizes the power density since during operation the inductor's capabilities are not fully exploited [7,8]. Recently the use of inductors working in partial saturation has been considered in literature where it has been assessed that the advantages in using a more compact inductor imply an acceptable amount of losses [9][10][11]. From the theoretical point of view, if the hypothesis of linearity for the inductor is removed, the value of the inductor varies with the current.…”

Section: Introductionmentioning

confidence: 99%

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

Lullo¹,

Scirè²,

Vitale³

2024

RE&PQJ

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Abstract. The paper is focused on the modelling of an inductor to exploit its non-linear behaviour in the roll-off region when it is employed in a DC/DC converter. The model is set up on the basis of experimental data measured in operating conditions, which are fitted to a polynomial curve describing the inductance variations. The analysis of the buck converter, performed by including the proposed model, is validated by experimental tests.

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Simulation of the Saturation and Air-Gap Effects in a POT Ferrite Core With a 2-D Finite Element Model

Cited by 27 publications

References 7 publications

Simple Procedure to Compute the Inductance of a Toroidal Ferrite Core from the Linear to the Saturation Regions

Simple Procedure to Compute the Inductance of a Toroidal Ferrite Core from the Linear to the Saturation Regions

Effective Permeability of Multi Air Gap Ferrite Core 3-Phase Medium Frequency Transformer in Isolated DC-DC Converters

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

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