Hysteresis Model of 3D Printed Magnetic Particles Based Polymer Composite Materials

This paper reports a magnetic lump model of a 3D printed polymer matrix filled with magnetic particles. Due to the intrinsically dielectric nature of the polymer and since the percolation threshold is not reached even for a high percentage of particles, great resistivity is still achieved, confirming a significant limitation of the formation of the so-called “macroscopic” eddy currents. Taking into account this characteristics, the model investigated in this work essentially focuses on “microscopic” eddy currents that is mainly related to the movement of magnetic domain walls. The proposed approach is then validated based on experimental results and finite element method (FEM), followed by simulation/measurement comparisons over a wide excitation frequency band.