Characteristics of power loss in soft magnetic composites a key for designing the best values of technological parameters

Reversible and irreversible DC magnetization processes in the frame of magnetic, thermal and electrical properties of Fe-based composite materials

“…the magnetic and thermal isotropy, extremely low classical losses and relatively low total energy losses at medium and higher frequencies (due to an insulating layer between iron powder particles the eddy currents are minimized), as well as a nearly netshape fabrication process ensuring a low cost mass production, which all makes them able to compete with traditionally used materials such as FeSi steels or soft magnetic ferrites at a similar production cost or even cheaper [1][2][3][4][5]. SMCs are well suited for use in alternating magnetic fields for electromagnetic applications such as cores with three dimensional ferromagnetic behaviour for transformers and electromotors, also as the electromagnetic circuits, sensors, electromagnetic actuation devices, low frequency filters, induction field coils, magnetic seal systems and magnetic field shielding [3][4][5][6][7]. One of the advantages of SMCs are their relatively low energy losses at medium and higher frequencies compared to FeSi steels -the cross-over point is about 400 Hz, where the losses for both materials are similar (at 1.5 T of about 90 W/kg, according to [1]).…”

“…One of the advantages of SMCs are their relatively low energy losses at medium and higher frequencies compared to FeSi steels -the cross-over point is about 400 Hz, where the losses for both materials are similar (at 1.5 T of about 90 W/kg, according to [1]). SMCs are typically produced by the powder metallurgy processing methodsdepending on the chosen combinations of materials and processing parameters, a wide range of properties can be obtained, so the electromagnetic and mechanical properties of SMCs can be tuned, within their physical limits, to the requirements of particular application [3][4][5][6].…”

A comparison of soft magnetic composites designed from different ferromagnetic powders and phenolic resins

“…PM techniques have been successfully used in order to prepare SMCs mostly by compaction of the pure iron powder particles, which are spatially separated from each other by insulating (dielectric) material [1][2][3]. The aim of PM technologies is to achieve SMCs with a high enough density and sufficiently stable mechanical properties, whereas an insulating layer between magnetic powder particles should ensure a high electrical resistivity minimizing the overall magnetic losses [4]. In comparison with laminated soft magnetic materials, SMCs prepared by PM methods have unique magnetic properties such as the threedimensional isotropic ferromagnetic behavior, low eddy current loss, as well as relatively lower total core loss at medium and high frequencies [5,6].…”

Magnetic properties and loss separation in Fe76−xAgxNb2Si13B9 amorphous alloys

“…In the present paper special attention has been paid to study plastic properties of the optimized material as well as magnetic loss separation into hysteresis loss, eddy-current loss and residual loss (mainly of relaxation origin). Such kind of studies is commonly used in order to characterize new materials with potential application possibilities [24][25][26][27]. Moreover, loss separation into independent components should give some indications about minimizing the influence of different factors on magnetic loss.…”