MHz mechanism of permeability in Fe-Si-Al soft magnetic composites
Source abstract
Abstract
MHz mechanism of permeability in soft magnetic composites (SMCs) based on epoxy-coated spherical Fe-Si-Al powders is studied. It is found the permeability at 1 MHz decreases from 23 to 10 and the cut-off frequency of permeability increases from 101 MHz to over 1 GHz with decreasing the volume fraction of powders in the SMCs from 90% to 60%, respectively. Combining with the results of ferromagnetic resonance, natural resonance modulated by eddy current is the dominated MHz mechanism of permeability. This is corresponding to both increase of cut-off frequency (from 26 MHz to 165 MHz) and decrease of loss (from 6776 kW m−3 to 1003 kW m−3 at 3 MHz) of SMCs with decreasing the particle sizes (from 96.0 μm to 9.3 μm). This study deepens the understanding of the permeability of SMCs in the MHz band, and provides a reference for the design of high frequency power electronics.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Magnetic Properties and Applications · Magnetic Properties of Alloys
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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