Material Synergy and Efficiency Enhancement in Axial Flux PMSM: Influence of Magnet, Core and Conductor Combinations
Year: 2025
Type: article
Abstract: This study investigates the material-dependent performance of an axial flux permanent magnet synchronous motor (AF-PMSM) through a systematic evaluation of magnet, core, and conductor combinations. The analysis reveals that transitioning from ferrite to high-energy NdFeB magnets significantly enhances efficiency, ranging from 74.58% to 85.91%, while concurrently increasing sensitivity to iron-core losses. Employing low-loss core materials, particularly Hiperco50, markedly improves overall efficiency, underscoring the necessity of advanced magnetic alloys in high-flux-density motor systems. Among the examined magnets, the advanced N55 grade NdFeB achieves the highest efficiency (87.19%) and lowest loss, surpassing Alnico5 and SmCo24. Although SmCo24 offers superior thermal stability, its per-formance remains inferior to that of N55. Conductor analysis further reveals that silver windings yield the highest efficiency (88.03%) and lowest total losses, slightly outperforming conventional copper at the expense of increased weight. Gold and aluminium conductors, by contrast, exhibit reduced efficiency due to higher resistivity. The findings highlight the crucial interplay between magnet strength, core loss characteristics, and conductor resistivity in determining overall AF-PMSM efficiency, providing valuable insight for the material optimiza-tion of traction motors in electric vehicle applications.
DOI: 10.14419/9beq9v16
Authors: Sandhiya Swaminathan, Saravanan Sivasamy, Srinivas K N
Institution: SRM Institute of Science and Technology
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4417115707
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