馬達智財聯盟 Motor Intellectual Property Alliance

作者	Sheng-Tse Wu, Po-Wei Huang, Tsung-Wei Chang, I-Hua Jiang and Mi-Ching Tsai
摘要	The flux-switching permanent magnet motor (FSPM) is an excellent choice for use in axial-flow machines, especially in aerospace industry applications that require high efficiency, high speed airflow, and power density [2]. FSPMs feature stators with windings and permanent magnets as well as rotors consisting of only soft magnetic materials, making them an attractive choice for their robust structure. Moreover, FSPMs are able to achieve higher power density and can be implemented with a combination of skew stator and airfoil shaped rotor [1], as shown in Fig. 1, allowing such a motor to produce airflow without impellers. However, FSPMs usually have higher operating frequency and core losses as compared with other motors at the same speed. Using thin steel sheets is a possible solution for the problem of high frequency loss. However, traditional 2D steel sheet lamination fabrication has difficulties producing the 3D skew stator and airfoil shaped rotor. Therefore, a new SMC (Soft Magnetic Composite) manufacturing process with selective laser melting (SLM) is used, allowing for both rapid prototyping as well as low core losses during high frequency operation. Moreover, in this paper, a modular design is adopted to simplify the fabrication process and making motor assembly much simpler.
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