Magnetic lump model for the hysteresis frequency dependence of a polymer matrix

Abstract : Based on complex space discretized hysteresis model of the ferromagnetic materials (including both macroscopic and microscopic eddy currents contributions), a simplified magnetic lump model of a polymer matrix material filled with magnetic particles is proposed in this paper. Due to its intrinsic nature, even for high percentage of magnetic particles, the tested sample exhibit high resistivity. This property implies a high limitation of the macroscopic eddy currents development. Considering this characteristic, the model proposed is limited to the microscopic eddy currents (related to the domain wall motions) contribution, and then checked and validated by comparing simulated/measured results on a large frequency bandwidth. A quite simple consideration of the frequency magnetic hysteresis dependence in such flexible magnetic materials is established and consolidated by testing it on a new material the validity of the microscopic eddy currents model. Index Terms—Magnetic polymer matrix, magnetic hysteresis, electromagnetic modeling.
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Bhaawan Gupta, Benjamin Ducharne, Gael Sebald, Tetsuya Uchimoto. Magnetic lump model for the hysteresis frequency dependence of a polymer matrix. 21st international conference on the Computation of Electromagnetic Fields COMPUMAG 2017, Jun 2017, Daejeon, South Korea. ⟨hal-01563584⟩

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