Eddy current and total power loss separation in the iron–phosphate–polyepoxy soft magnetic composites

Taghvaei, Amir Hossein; Shokrollahi, H.; Janghorban, K.; Abiri, Habibollah

doi:10.1016/j.matdes.2009.05.026

Cited by 190 publications

(52 citation statements)

References 12 publications

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“…1 can also be used with the specic resistivity of magnetic material ρ R instead of ρ bulk R and for spherical magnetic particles (β = 20 [2]) the particle diameter as d ef f . The dependencies of total losses versus frequency (dc 100 Hz) at maximum ux density of 0.2 T are depicted in Fig.…”

Section: Resultsmentioning

confidence: 99%

Influence of Vitroperm Content on the Energy Losses in Composite Materials Based on the Mixture of Two Ferromagnets

et al. 2014

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Soft magnetic composites oer several advantages such as 3D isotropic magnetic properties and relatively small energy losses, nding use in electrical devices like electromotors, transformers or sensors. The aim of this work was to investigate the dc and ac magnetic properties of composites based on the mixture of two dierent ferromagnets: iron based material Somaloy R 700 and Vitroperm R 500 alloy. The analysis of total losses into dc losses, classical losses and excess losses showed that the classical and excess losses were negligibly small. The specic resistivity was increasing with the increasing fraction of Vitroperm (VPM). The coercivity exhibited maximum at 20% of VPM.

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Section: Resultsmentioning

confidence: 99%

Influence of Vitroperm Content on the Energy Losses in Composite Materials Based on the Mixture of Two Ferromagnets

et al. 2014

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“…In order to overcome the difficulties and ambiguities associated with the conventional four-point 65 resistivity measurement [8][14], an indirect method, where the toroidal sample is used as the secondary 66 winding of a transformer, has been adopted [15]. The results, reported in Table 1, show that the 67 SMC 1 (organic binder).…”

Section: B Resistivity Measurements 64mentioning

confidence: 99%

“…flow at two different scales: the scale of the single particle (microscopic e.c. ), and 26 the scale of the whole sample (macroscopic e.c., due to intergrain conductivity) [6] [7] [8]. The 27 correspondingly measured bulk resistivity is often considered in the macroscopic eddy current 28 calculations, assuming an equivalent homogeneous material.…”

Section: Introduction 19mentioning

confidence: 99%

Classical eddy current losses in soft magnetic composites

Appino

Barrière²,

Fiorillo³

et al. 2013

Journal of Applied Physics

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1 a Corresponding author: barriere@satie.ens-cachan.fr 2 This paper deals with the problem of loss evaluation in Soft Magnetic Composites (SMC), focusing 2 on the classical loss component. It is known that eddy currents can flow in these granular materials at 3 two different scales, that of the single particle (microscopic eddy currents) and that of the specimen 4 cross-section (macroscopic eddy currents), the latter ensuing from imperfect insulation between 5 particles. It is often argued that this macroscopic loss component can be calculated considering an 6 equivalent homogeneous material of same bulk resistivity. This assumption has not found so far clear 7 and general experimental validation. In this paper, we discuss energy loss experiments in two different 8 SMC materials, obtained using different binder types, and we verify that a classical macroscopic loss 9 component, the sole size-dependent term, can be separately identified. It is also put in evidence that, 10 depending on the material, the measured sample resistivity and the equivalent resistivity entering the 11 calculation of the macroscopic eddy currents may not be the same. A corrective coefficient is therefore 12 introduced and experimentally identified. This coefficient appears to depend on the material type only, 13

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“…A lot of work has been done in this field up to the present time and the energy losses in various magnetic materials have been analyzed [4][5][6]. The main feature of SMCs is that an insulating layer between the iron powder particles minimises the eddy currents, finally resulting in lower total energy losses at medium and higher frequencies.…”

Section: Introductionmentioning

confidence: 99%

Influence of Vitrovac Content on Magnetic Properties in Composite Materials Based on the Mixture of Two Ferromagnets

et al. 2017

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Soft magnetic composite materials play an important role in nowadays industry, replacing the traditional materials such as electrical steels and soft ferrites, especially at medium and higher frequency applications. The material can be tailored for a specific application by changing the composition of the material and by adaptation of the fabrication process. The aim of this work was to investigate the morphology, phase composition and magnetic properties of soft magnetic composite materials with various magnetic content to minimize the total magnetic losses. The prepared sample series was based on the mixture of two different ferromagnets Vitrovac 6155 and Somaloy 700 without addition of insulating material. The samples were prepared by conventional powder metallurgy with particular fraction of Vitrovac in the form of a ring for magnetic measurements in AC fields and electric resistivity measurements. The samples with 5 wt% and 20 wt% fractions of Vitrovac exhibit lower values of total losses in comparison with Somaloy heat treated at 530• C.

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Eddy current and total power loss separation in the iron–phosphate–polyepoxy soft magnetic composites

Cited by 190 publications

References 12 publications

Influence of Vitroperm Content on the Energy Losses in Composite Materials Based on the Mixture of Two Ferromagnets

Influence of Vitroperm Content on the Energy Losses in Composite Materials Based on the Mixture of Two Ferromagnets

Classical eddy current losses in soft magnetic composites

Influence of Vitrovac Content on Magnetic Properties in Composite Materials Based on the Mixture of Two Ferromagnets

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