AC Magnetic Loss Reduction of SLM Processed Fe-Si for Additive Manufacturing of Electrical Machines
Energies 2021
Hans Tiismus, Ants Kallaste, Anouar Belahcen, Marek Tarraste, Toomas Vaimann, Anton Rassolkin, Bilal Asad, Payam Shams Ghahfarokhi

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 °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.


Atslēgas vārdi
electric machines; additive manufacturing; soft magnetic materials; selective laser melting; iron losses; magnetic properties
DOI
10.3390/en14051241
Hipersaite
https://www.mdpi.com/1996-1073/14/5/1241

Tiismus, H., Kallaste, A., Belahcen, A., Tarraste, M., Vaimann, T., Rassolkin, A., Asad, B., Shams Ghahfarokhi, P. AC Magnetic Loss Reduction of SLM Processed Fe-Si for Additive Manufacturing of Electrical Machines. Energies, 2021, Vol. 14, No. 5, Article number 1241. ISSN 1996-1073. Pieejams: doi:10.3390/en14051241

Publikācijas valoda
English (en)
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