The Experts below are selected from a list of 195 Experts worldwide ranked by ideXlab platform

Laurent Daniel - One of the best experts on this subject based on the ideXlab platform.

  • Effective properties and eddy current losses of soft magnetic composites
    Journal of Applied Physics, 2021
    Co-Authors: Romain Corcolle, Xiaotao Ren, Laurent Daniel
    Abstract:

    This paper presents a semi-analytical homogenization model for Soft Magnetic Composites (SMCs), providing the effective magnetic behavior and the level of Eddy Current (EC) losses. Both linear and nonlinear magnetic behavior are considered. A magnetic circuit made of SMC is then modeled with a Finite Element Model (FEM). The size of heterogeneities of SMC being much smaller than the device size, the proposed approach relieves the burden of a very fine mesh in the FEM, by using the effective properties of an Equivalent Homogeneous Material. The approach is validated by comparing the results on the homogenized magnetic circuit with the ones obtained from a computationally heavy FEM describing the heterogeneities with a very fine mesh. The results show that the homogenized model provides a very accurate description of the magnetic behavior and EC losses of SMC for both linear and nonlinear cases.

Carlo Stefano Ragusa - One of the best experts on this subject based on the ideXlab platform.

  • Classical eddy current losses in soft magnetic composites
    Journal of Applied Physics, 2013
    Co-Authors: Carlo Appino, O. De La Barriere, F. Fiorillo, Martino Lobue, Frederic Mazaleyrat, Carlo Stefano Ragusa
    Abstract:

    This paper deals with the problem of loss evaluation in Soft Magnetic Composites (SMCs), focusing on the classical loss component. It is known that eddy currents can flow in these granular Materials at two different scales, that of the single particle (microscopic eddy currents) and that of the specimen cross-section (macroscopic eddy currents), the latter ensuing from imperfect insulation between particles. It is often argued that this macroscopic loss component can be calculated considering an Equivalent Homogeneous Material of same bulk resistivity. This assumption has not found so far clear and general experimental validation. In this paper, we discuss energy loss experiments in two different SMC Materials, obtained using different binder types, and we verify that a classical macroscopic loss component, the sole size-dependent term, can be separately identified. It is also put in evidence that, depending on the Material, the measured sample resistivity and the Equivalent resistivity entering the calculation of the macroscopic eddy currents may not be the same. A corrective coefficient is, therefore, introduced and experimentally identified. This coefficient appears to depend on the Material type only. An efficient way to calculate the macroscopic classical loss in these Materials is thus provided.

Romain Corcolle - One of the best experts on this subject based on the ideXlab platform.

  • Effective properties and eddy current losses of soft magnetic composites
    Journal of Applied Physics, 2021
    Co-Authors: Romain Corcolle, Xiaotao Ren, Laurent Daniel
    Abstract:

    This paper presents a semi-analytical homogenization model for Soft Magnetic Composites (SMCs), providing the effective magnetic behavior and the level of Eddy Current (EC) losses. Both linear and nonlinear magnetic behavior are considered. A magnetic circuit made of SMC is then modeled with a Finite Element Model (FEM). The size of heterogeneities of SMC being much smaller than the device size, the proposed approach relieves the burden of a very fine mesh in the FEM, by using the effective properties of an Equivalent Homogeneous Material. The approach is validated by comparing the results on the homogenized magnetic circuit with the ones obtained from a computationally heavy FEM describing the heterogeneities with a very fine mesh. The results show that the homogenized model provides a very accurate description of the magnetic behavior and EC losses of SMC for both linear and nonlinear cases.

Carlo Appino - One of the best experts on this subject based on the ideXlab platform.

  • Classical eddy current losses in soft magnetic composites
    Journal of Applied Physics, 2013
    Co-Authors: Carlo Appino, O. De La Barriere, F. Fiorillo, Martino Lobue, Frederic Mazaleyrat, Carlo Stefano Ragusa
    Abstract:

    This paper deals with the problem of loss evaluation in Soft Magnetic Composites (SMCs), focusing on the classical loss component. It is known that eddy currents can flow in these granular Materials at two different scales, that of the single particle (microscopic eddy currents) and that of the specimen cross-section (macroscopic eddy currents), the latter ensuing from imperfect insulation between particles. It is often argued that this macroscopic loss component can be calculated considering an Equivalent Homogeneous Material of same bulk resistivity. This assumption has not found so far clear and general experimental validation. In this paper, we discuss energy loss experiments in two different SMC Materials, obtained using different binder types, and we verify that a classical macroscopic loss component, the sole size-dependent term, can be separately identified. It is also put in evidence that, depending on the Material, the measured sample resistivity and the Equivalent resistivity entering the calculation of the macroscopic eddy currents may not be the same. A corrective coefficient is, therefore, introduced and experimentally identified. This coefficient appears to depend on the Material type only. An efficient way to calculate the macroscopic classical loss in these Materials is thus provided.

Xiaotao Ren - One of the best experts on this subject based on the ideXlab platform.

  • Effective properties and eddy current losses of soft magnetic composites
    Journal of Applied Physics, 2021
    Co-Authors: Romain Corcolle, Xiaotao Ren, Laurent Daniel
    Abstract:

    This paper presents a semi-analytical homogenization model for Soft Magnetic Composites (SMCs), providing the effective magnetic behavior and the level of Eddy Current (EC) losses. Both linear and nonlinear magnetic behavior are considered. A magnetic circuit made of SMC is then modeled with a Finite Element Model (FEM). The size of heterogeneities of SMC being much smaller than the device size, the proposed approach relieves the burden of a very fine mesh in the FEM, by using the effective properties of an Equivalent Homogeneous Material. The approach is validated by comparing the results on the homogenized magnetic circuit with the ones obtained from a computationally heavy FEM describing the heterogeneities with a very fine mesh. The results show that the homogenized model provides a very accurate description of the magnetic behavior and EC losses of SMC for both linear and nonlinear cases.