| Title |
FEA Based Baseline Design Process of Ferrite Spoke-Type Motors Considering Irreversible Demagnetization and Magnetization |
| Authors |
이승헌(Seung-Heon Lee) ; 정동훈(Dong-Hoon Jung) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.12.2510 |
| Keywords |
Ferrite spoke-type; Irreversible demagnetization of permanent magnet; Magnetization of permanent magnet; Process |
| Abstract |
Rare earth permanent magnets, essential for high efficiency motors, face sustainability challenges due to supply chain dependence and price volatility. To address this issue, alternatives such as switched reluctance motor (SRM) and synchronous reluctance motor (SynRM) have been studied, but their low torque density and efficiency limit broader applications. Recently, ferrite magnets have gained attention for their low cost and corrosion resistance, with spoke-type flux concentrating structures widely applied to offset their weak magnetic properties. This study investigates a 10pole 15slot ferrite spoke-type permanent magnet motor and proposes a baseline design process that considers both demagnetization and magnetization. Finite element analysis (FEA) is performed for preliminary design, irreversible demagnetization, and multi-step segmented magnetization. In addition, a novel magnetization strategy using auxiliary poles is presented. The proposed method offers an effective approach to developing environmentally friendly, high-efficiency motors as alternatives to rare earth based machine. |