Equivalent Electrical Model of a Ferrite Core Inductor Excited by a Square Waveform Including Saturation and Power Losses for Circuit Simulation

Salas, Rosa Ana; Pleite, J.

doi:10.1109/tmag.2013.2238223

Cited by 35 publications

(18 citation statements)

References 13 publications

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“…We show the results for the linear region in Figures 8 ( V in ≈ 5.4 V, 40 kHz) and 10 ( V in ≈ 11.68 V, 100 kHz). The results for the saturation region are represented in Figures 9 ( V in ≈ 12 V, 40 kHz) and 11 ( V in ≈ 22.63 V, 100 kHz) [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Simulation of Waveforms of a Ferrite Inductor with Saturation and Power Losses

Salas¹,

Pleite²

2014

Materials

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We propose a model of an equivalent electrical circuit specifically designed for a ferrite indAuctor excited by a sinusoidal waveform. The purpose of this model is its use in a circuit simulator. We calculate the model parameters by means of Finite Elements in 2D which leads to significant computational advantages over the 3D model. We carry out the validation for a toroidal ferrite inductor by comparing the experimental results and computed ones. We consider the saturation and power losses in the core. In addition, we have tested the model for the case of square waveform in order to generalize the results. We find excellent agreement between the experimental data and the results obtained by numerical calculations.

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Section: Resultsmentioning

confidence: 99%

Simulation of Waveforms of a Ferrite Inductor with Saturation and Power Losses

Salas¹,

Pleite²

2014

Materials

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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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“…In order to increase the inductance density, increase the saturation current and reduce the core loss of a power inductor, magnetic materials with larger permeability, higher saturation magnetization, larger resistivity and smaller coercivity (such as ferrite materials) are desired [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…This supports the size reduction of power converters through power inductor miniaturization. For this purpose, different methods, such as the utilization of new magnetic materials as power inductor cores and designing new power inductor structures, have been proposed in the literature [12][13][14][15][16][17]. One of the methods used to increase the saturation current (or effectively reduce the size and weight) of the power inductor utilizes one or more permanent magnet(s) (PM) to partially cancel the magnetic fluxes generated by the power inductor winding [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of High-Current Toroid Power Inductor With NdFeB Magnet for DC–DC Power Converters

Dang

Qahouq

2015

IEEE Trans. Ind. Electron.

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This paper presents an experimental evaluation of a high current toroid power inductor (TPI) with NdFeB permanent magnet (PMTPI). By adding a small piece of fabricated NdFeB-N35EH magnet (magnet volume is ~0.36% of the PMTPI ferrite core volume) in the air gap of the TPI, the saturation current of the PMTPI is doubled with the same size and inductance value. The desired dimensions of the NdFeB-N35EH PM are calculated before fabrication and then the fabricated PM is characterized. The ~6.8 μH PMTPI is tested in a 5V to 2V buck power converter. Results show that compared to a TPI with the same size and inductance (~6.8μH) without the PM, the saturation current of the PMTPI is doubled (from 7A to 14A). Compared to another TPI with a larger size needed to double the saturation current, the ferrite core weight of the PMTPI is reduced to 53.6% and the core volume is reduced to 59.2%. Experimental results also show that the addition of the NdFeB-N35EH PM does not introduce additional power losses and increase of temperature for the PMTPI and does not affect the power converter efficiency.

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Equivalent Electrical Model of a Ferrite Core Inductor Excited by a Square Waveform Including Saturation and Power Losses for Circuit Simulation

Cited by 35 publications

References 13 publications

Simulation of Waveforms of a Ferrite Inductor with Saturation and Power Losses

Simulation of Waveforms of a Ferrite Inductor with Saturation and Power Losses

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

Evaluation of High-Current Toroid Power Inductor With NdFeB Magnet for DC–DC Power Converters

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