Computation of Eddy Current Losses in Soft Magnetic Composites
- 18 October 2012
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Magnetics
- Vol. 48 (11), 3470-3473
- https://doi.org/10.1109/tmag.2012.2205670
Abstract
We compute the classical eddy current losses in soft magnetic composite (SMC) materials, taking into account the eddy current paths appearing at the scale of the sample cross-section because of random contacts between the grains. The prediction of this loss contribution is a challenging task, because of the stochastic nature of the associated conduction process. We start our study from an identification of the statistical properties of the contacts between grains, starting from resistivity measurements. We then develop a numerical loss model for random grain-to-grain conduction, by which we demonstrate that the classical loss in SMCs can be decomposed into a contribution deriving from the eddy currents circulating inside the grains and a contribution due to the macroscopic eddy currents flowing from grain to grain via random contacts. An experimental validation of this model is proposed for a representative SMC material, where the magnetic losses are measured in ring samples with a range of cross-sectional areas.Keywords
This publication has 11 references indexed in Scilit:
- A Multiscale Approach to Predict Classical Losses in Soft Magnetic CompositesIEEE Transactions on Magnetics, 2012
- Design and Optimization of Soft Magnetic Composite Machines With Finite Element MethodsIEEE Transactions on Magnetics, 2011
- Loss separation in soft magnetic compositesJournal of Applied Physics, 2011
- Optimized Design Considering the Mass Influence of an Axial Flux Permanent-Magnet Synchronous Generator With Concentrated Pole WindingsIEEE Transactions on Magnetics, 2010
- Influence of Magnetic Materials on Claw Pole Machines BehaviorIEEE Transactions on Magnetics, 2010
- Comparison of Axial Flux PM Synchronous Machines With Different Rotor Back CoresIEEE Transactions on Magnetics, 2010
- Eddy current and total power loss separation in the iron–phosphate–polyepoxy soft magnetic compositesMaterials & Design (1980-2015), 2009
- Analytical Computation of the Full Load Magnetic Losses in the Soft Magnetic Composite Stator of High-Speed Slotless Permanent Magnet MachinesIEEE Transactions on Magnetics, 2009
- Dynamic losses in FeSi filled polymer bonded soft magnetic compositesJournal of Magnetism and Magnetic Materials, 2006
- Electromagnetic phenomena in heterogeneous media: Effective properties and local behaviorJournal of Applied Physics, 2006