Modeling of soft magnetic composites

Cui, Yanhong; Kliman, G.B.

doi:10.1109/ias.2004.1348458

Cited by 7 publications

(1 citation statement)

References 6 publications

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“…This approach could be justified in materials 41 where, like in [6], the grains are well separated and the 42 material conductivity is dictated by the conductivity of the 43 insulating filler. However, in the practical high-density SMCs 44 for electrical machines, the measured resistivity is chiefly the 45 one arising from the random contacts between the grains [9]. 46…”

Section: Introduction 19mentioning

confidence: 99%

Computation of Eddy Current Losses in Soft Magnetic Composites

et al. 2012

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We compute the classical eddy current losses in Soft Magnetic Composite (SMC) materials, taking into account the eddy current 8 paths appearing at the scale of the sample cross-section because of random contacts between the grains. The prediction of this loss 9 contribution is a challenging task, because of the stochastic nature of the associated conduction process. We start our study from an 10 identification of the statistical properties of the contacts between grains, starting from resistivity measurements. We then develop a 11 numerical loss model for random grain-to-grain conduction, by which we demonstrate that the classical loss in SMCs can be 12 decomposed into a contribution deriving from the eddy currents circulating inside the grains and a contribution due to the 13 macroscopic eddy currents flowing from grain to grain via random contacts. An experimental validation of this model is proposed for 14 a representative SMC material, where the magnetic losses are measured in ring samples with a range of cross-sectional areas. 15 16 Index Terms-Soft Magnetic Composites (SMC), Eddy current losses, Classical losses, Conductivity of heterogeneous materials 17 18 228 the eddy current density as MIC MAC J J J = + , where MIC J is 229 restricted at the scale of the grain (i.e. its volume integral on 230 the grain is zero), and another component MAC J W J dS J dS J J dS f

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Section: Introduction 19mentioning

confidence: 99%

Computation of Eddy Current Losses in Soft Magnetic Composites

et al. 2012

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Modeling of soft magnetic composite material using a non linear homogenization method

Belkadi

Trichet

Ramdane

et al. 2010

Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation

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Performance analysis and experimental research on multi-section claw pole machine with outer PM rotor

Zhang

Liu

Bai

et al. 2011

2011 International Conference on Electrical Machines and Systems

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In view of improving performance of high frequency machine, a Multi-section Claw Pole Machine (MCPM) based on soft magnetic composite material with outer PM rotors was proposed. The structure characteristics and operating principal of MCPM were introduced. Then the calculation method of core loss based on separating iron loss modeland cogging torque based on virtual placement method was presented. Finally, one prototype of 1.5 kW 12-poles MCPM was developed, and the experiments as motor and generator were carried out. The correctness and feasibility of theory analysis method is verified.

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Modeling of soft magnetic composites

Cited by 7 publications

References 6 publications

Computation of Eddy Current Losses in Soft Magnetic Composites

Computation of Eddy Current Losses in Soft Magnetic Composites

Modeling of soft magnetic composite material using a non linear homogenization method

Performance analysis and experimental research on multi-section claw pole machine with outer PM rotor

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