ScholarWorks@경상국립대학교

초록

This study investigates a newly developed soft magnetic composite (SMC) material for axial flux permanent magnet (AFPM) machines. While silicon steel offers excellent magnetic properties, its use in AFPM machines is limited by complex and costly manufacturing processes. In contrast, SMC materials allow net-shape fabrication and three-dimensional (3D) flux paths but typically suffer from higher losses and lower permeability. To overcome these limitations, an advanced SMC, denoted as SMC-X1 (anonymized for confidentiality), was developed to reduce eddy current losses while maintaining competitive magnetic properties. This material was employed in stator cores of a 150 kW yokeless and segmented armature (YASA) type AFPM motor and evaluated against a conventional SMC grade, 0.35 mm and 0.2 mm non-oriented (NO) silicon steel using 3D finite element analysis (FEA). The results show that the new SMCs significantly reduce eddy current losses and consequently improve overall efficiency, achieving performance comparable to NO silicon steel materials, and demonstrating the developed SMC material as a viable option for electric vehicle (EV) traction applications.

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