AC Magnetic Loss Reduction of SLM Processed Fe-Si for Additive Manufacturing of Electrical Machines
AC Magnetic Loss Reduction of SLM Processed Fe-Si for Additive Manufacturing of Electrical Machines
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DOI：
10.3390/en14051241
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发表时间：
2021-03-01
期刊：
影响因子：
3.2
通讯作者：
Shams Ghahfarokhi, Payam
中科院分区：
文献类型：
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作者：
Tiismus, Hans;Kallaste, Ants;Shams Ghahfarokhi, Payam
增材制造的软磁 Fe-3.7%w.t.Si 环形样品具有固体和新颖的分区横截面几何形状，通过磁性测量进行表征。本研究重点关注气隙和退火温度对 50 Hz 频率下交流磁芯损耗的影响。此外，还展示了直流电磁材料特性，显示出与传统和其他 3D 打印的高级软磁材料相当的结果。在 1800 A/m 下实现了 1.5 T 的磁化强度，最大相对磁导率为 28,900，磁滞损耗为 0.61 (1 T) 和 1.7 (1.5 T) W/kg。观察到 50 Hz 时总磁芯损耗下降的明显趋势与样本横截面拓扑的偏析有关。在 1200 摄氏度下退火的具有四个内部气隙的环形样品测得最低的 50 Hz 总磁芯损耗，总磁芯损耗为 1.2 (1 T) 和 5.5 (1.5 T) W/kg。与固体批量印刷材料相比，这相当于 1 T 磁化强度下总磁芯损耗降低 860%，1.5 T 磁化强度损耗降低 510%。基于这些发现，详细讨论了印刷气隙材料内部结构的优点和缺点。
Additively manufactured soft magnetic Fe-3.7%w.t.Si toroidal samples with solid and novel partitioned cross-sectional geometries are characterized through magnetic measurements. This study focuses on the effect of air gaps and annealing temperature on AC core losses at the 50 Hz frequency. In addition, DC electromagnetic material properties are presented, showing comparable results to conventional and other 3D-printed, high-grade, soft magnetic materials. The magnetization of 1.5 T was achieved at 1800 A/m, exhibiting a maximum relative permeability of 28,900 and hysteresis losses of 0.61 (1 T) and 1.7 (1.5 T) W/kg. A clear trend of total core loss reduction at 50 Hz was observed in relation to the segregation of the specimen cross-sectional topology. The lowest 50 Hz total core losses were measured for the toroidal specimen with four internal air gaps annealed at 1200 degrees C, exhibiting a total core loss of 1.2 (1 T) and 5.5 (1.5 T) W/kg. This is equal to an 860% total core loss reduction at 1 T and a 510% loss reduction at 1.5 T magnetization compared to solid bulk-printed material. Based on the findings, the advantages and disadvantages of printed air-gapped material internal structures are discussed in detail.