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This paper examines the potential of epoxy-based soft magnetic powder cores (SMPC) for electric motor applications. SMPC, created by uniformly dispersing iron-based ferromagnetic powder into epoxy resin, effectively reduces eddy current losses and decreases magnetic anisotropy, resulting in more uniform magnetic properties. Although SMPCs exhibit lower permeability compared to conventional laminated steel cores, they are particularly advantageous for complex geometries, such as those in axial-flux motors. This study examines the feasibility of epoxy-based SMPCs by analyzing their magnetic properties and mechanical strength. Key factors, including powder particle size and the powder-to-epoxy ratio, are investigated to optimize both magnetic performance and structural integrity. Additionally, fabrication methods for achieving homogeneity in SMPCs are investigated to ensure consistent performance in electric motors. These results are expected to advance the development of SMPC materials for future motor applications.
This paper was supported by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government (MOTIE) (RS-2024-00424595 / Regional Residency Program for Cultivating Advanced Research Talent in Next-Generation Marine Mobility Industry Innovation), and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. RS-2024-00391886).
