馬達智財聯盟 Motor Intellectual Property Alliance

作者	Tsung-Wei Chang,Mi-Ching Tsai
摘要	In this work, selective laser melting (SLM, also called 3D printing) is employed at high temperature to manufacture three-dimensional motor core components with high magnetic permeability and low iron loss without the use of molds. Magnetic flux path dispatched via 3D printing is used to replace silicon steel sheet, owning to its advantages in lowering eddy current loss and core loss at high operating frequencies. However, with the high temperatures inherent to the SLM process, the insulation layer of traditional SMC powder would be melted and the low iron loss feature cannot be maintained. This paper presents a high performance Fe-Si-Al powder along with a new insulation process which is suitable for motor fabrication 3D printing requiring lower iron loss. The key parameters such as thickness of the powder insulation layer, laser power variation and scanning speed as well as oxygen percentages of the chamber during SLM processing, are investigated [2]. Moreover, a motor prototype based on the new powder and optimized processed parameters is made to verify these features.
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