Selecting the Active Zone Configuration for an Axial Flux Permanent Magnet Synchronous Motor
DOI:
https://doi.org/10.24160/0013-5380-2026-9-64-75Keywords:
axial flux synchronous motor, permanent magnet machines, design solutions, modeling, finite element analysisAbstract
The article investigates the influence of various active zone design solutions on the parameters of a 60 kW axial flux permanent magnet synchronous motor with a yokeless segmented armature. Using computer finite element simulation, various design options are compared, including excitation system configurations with magnets magnetized only in the axial direction, a Halbach array, and a Halbach array without a ferromagnetic back iron on the rotor, as well as configurations with open and semi-closed stator slots. Three stator core materials are considered: grade 2421 electrical steel, soft magnetic composite material Somaloy 700HR 5P, and additively manufactured Fe-4.5Si alloy. The influence of these solutions on the key machine parameters such as mechanical power, active zone mass, core and magnet losses, and power factor is evaluated. Based on the study results, an active zone design is selected that provides balanced energy and mass-and-dimensional characteristics with acceptable manufacturability. Proceeding from the selected configuration, the electric motor’s 3D model has been developed, which makes it possible to evaluate the mass-and-dimensional parameters of the entire machine and compare it with the solutions presented on the market.
References
1. Качанов И.М. и др. Электродвигатели для тяжелых беспилотных летательных аппаратов. – Электротехника, 2025, № 2, с. 66–74.
2. Ковалев Л.К. и др. Многополюсные синхронные генераторы с постоянными магнитами для ветроэнергетических установок. – Электричество, 2013, № 8, с. 2–8.
3. Hao Z. et al. A Review of Axial-Flux Permanent-Magnet Motors: Topological Structures, Design, Optimization and Control Techniques. – Machines, 2022, vol. 10, No. 12, DOI: 10.3390/machines10121178.
4. Douine B. et al. Overview of High Temperature Superconductor Machines. – Электричество, 2021, № 4, с. 25–33.
5. Modestov K. et al. Disk-Type Inductor Electric Machine Based on High-Temperature Superconductors. – Int. Conf. on Electrotechnical Complexes and Systems, 2021, pp. 314–318, DOI: 10.1109/ICOECS 52783.2021.9657407.
6. Ковалев Л.К. и др. Многодисковый гистерезисный электродвигатель на основе объемных высокотемпературных сверхпроводников. – Электричество, 1998, № 3, с. 33–43.
7. Jenkins C. et al. Innovations in Axial Flux Permanent Magnet Motor Thermal Management for High Power Density Applications. – IEEE Transactions on Transportation Electrification, 2023, vol. 9, No. 3, pp. 4380–4405, DOI: 10.1109/TTE.2023.3242698.
8. Su L. et al. Multi-Objective Optimization of Yokeless and Segmented Armature Machine for In-Wheel Traction Applications Based on the DOI: 10.3390/machines12040221.
9. Vision One-Eleven [Электрон. ресурс], URL: https://group.mercedes-benz.com/technology/innovation/vision/vision-oneeleven.html (дата обращения 03.03.2026).
10. Axial Flux in Motion: A Story of Electrified Performance [Электрон. ресурс], URL: https://yasa.com/applications/ (дата обращения 01.03.2026).
11. Aviation [Электрон. ресурс], URL: https://emrax.com/references/aviation-aerospace/ (дата обращения 01.03.2026).
12. Шимчак П. Дисковые синхронные машины с постоянными магнитами: современное состояние и тенденции развития. – Электричество, 2009, № 8, с. 37–46.
13. Benlamine R. et al. 3-D Numerical Hybrid Method for PM Eddy-Current Losses Calculation: Application to Axial-Flux PMSMs. – IEEE Transactions on Magnetics, 2015, vol. 51, No. 7, DOI: 10.1109/TMAG.2015.2405053.
14. Кацман М.М. Электрические машины. М.: Высшая школа, 1990, 463 с.
15. Zhu Z.Q., Howe D. Halbach Permanent Magnet Machines and Applications: A Review. – IEE Proceedings – Electric Power Applications, 2001, vol. 148, No. 4, pp. 299–308, DOI: 10.1049/ip-epa: 20010479.
16. Talebi D. et al. Design of a Carbon Fiber Rotor in a Dual Rotor Axial Flux Motor for Electric Aircraft. – IEEE Transactions on Industry Applications, 2024, vol. 60, No. 5, pp. 6846–6855, DOI: 10.1109/TIA.2024.3425802.
17. Yun J., Grainger B., Ohodnicki P. A Study on the Performance Improvement of Axial Flux Permanent Magnet Machines Based on Stator Slot Design with Semi-Closed Slots or Magnetic Wedges. – IEEE Transportation Electrification Conf. and Expo, 2024, DOI: 10.1109/ITEC60657.2024.10598883.
18. Xuan H.V., Trong V.N. Effective Electromagnetic Models for the Design of Axial Flux Permanent Magnet Generators in Wind Power. – Engineering Proceedings, 2025, vol. 104, DOI: 10.3390/engproc2025104082.
19. Sergeant P., Vansompel H., Dupré L. Effect of Stator Slot Openings in Axial Flux Permanent Magnet Machines. – Int. Conf. on Modeling and Simulation of Electric Machines, Converters and Systems, 2014, pp. 512–517.
20. Jara W. et al. Rotor Eddy-Current Losses Reduction in an Axial Flux Permanent-Magnet Machine. – IEEE Transactions on Industrial Electronics, 2016, vol. 63, No. 8, pp. 4729–4737, DOI: 10.1109/TIE.2016.2547368.
21. Исмагилов Ф.Р., Вавилов В.Е. К вопросу определения потерь на вихревые токи в постоянных магнитах высокооборотных электромеханических преобразователей энергии. – Вестник Московского авиационного института, 2017, т. 24, № 4, с. 143–150.
22. Shokrollahi H., Janghorban K. Soft Magnetic Composite Materials (SMCs). – Journal of Materials Processing Technology, 2007, vol. 189, No. 1–3, DOI: 10.1016/j.jmatprotec.2007.02.034.
23. Somaloy, Powders for Electromagnetic Applications [Электрон. ресурс], URL: https://www.hoganas.com/en/powder-technologies/soft-magnetic-composites/products/coated-powders-for-electromagnetic-applications/ (дата обращения 15.02.2026).
24. P400 R Electric Motors [Электрон. ресурс], URL: https://yasa.com/media/2021/05/yasa-p400rdatasheet-rev-14.pdf (дата обращения 25.05.2026).
25. 750 R Electric Motors [Электрон. ресурс], URL: https://yasa.com/media/2021/05/yasa-750rdatasheet-rev-11.pdf (дата обращения 25.05.2026).
26. EMRAX 208 [Электрон. ресурс], URL: https://emrax.com/e-motors/emrax-208/ (дата обращения 25.05.2026).
27. EMRAX 268 [Электрон. ресурс], URL: https://emrax.com/e-motors/emrax-268/ (дата обращения 25.05.2026).
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Работа выполнена в рамках Соглашения о предоставлении из федерального бюджета гранта на проведение крупных научных проектов по приоритетным направлениям научно-технологического развития Минобрнауки России № 075-15-2024-552.
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1. Kachanov I.M. et al. Elektrotehnika – in Russ. (Electrical Engineering), 2025, No. 2, pp. 66–74.
2. Kovalev L.K. et al. Elektrichestvo – in Russ. (Electricity), 2013, No. 8, pp. 2–8.
3. Hao Z. et al. A Review of Axial-Flux Permanent-Magnet Motors: Topological Structures, Design, Optimization and Control Techniques. – Machines, 2022, vol. 10, No. 12, DOI: 10.3390/machines10121178.
4. Douine B. et al. Elektrichestvo – in Russ. (Electricity), 2021, No. 4, pp. 25–33.
5. Modestov K. et al. Disk-Type Inductor Electric Machine Based on High-Temperature Superconductors. – Int. Conf. on Electrotechnical Complexes and Systems, 2021, pp. 314–318, DOI: 10.1109/ICOECS 52783.2021.9657407.
6. Kovalev L.K. et al. Elektrichestvo – in Russ. (Electricity), 1998, No. 3, pp. 33–43.
7. Jenkins C. et al. Innovations in Axial Flux Permanent Magnet Motor Thermal Management for High Power Density Applications. – IEEE Transactions on Transportation Electrification, 2023, vol. 9, No. 3, pp. 4380–4405, DOI: 10.1109/TTE.2023.3242698.
8. Su L. et al. Multi-Objective Optimization of Yokeless and Segmented Armature Machine for In-Wheel Traction Applications Based on the Taguchi Method. – Machines, 2024, vol. 12, No. 4, DOI: 10.3390/machines12040221.
9. Vision One-Eleven [Electron. resource], URL: https://group.mercedes-benz.com/technology/innovation/vision/vision-oneeleven.html (Accessed on 03.03.2026).
10. Axial Flux in Motion: A Story of Electrified Performance [Electron. resource], URL: https://yasa.com/applications/ (Accessed on 01.03.2026).
11. Aviation [Electron. resource], URL: https://emrax.com/references/aviation-aerospace/ (Accessed on 01.03.2026).
12. Shimchak P. Elektrichestvo – in Russ. (Electricity), 2009, No. 8, pp. 37–46.
13. Benlamine R. et al. 3-D Numerical Hybrid Method for PM Eddy-Current Losses Calculation: Application to Axial-Flux PMSMs. – IEEE Transactions on Magnetics, 2015, vol. 51, No. 7, DOI: 10.1109/TMAG.2015.2405053.
14. Katsman M.M. Elektricheskie mashiny (Electric Machines). M.: Vysshaya shkola, 1990, 463 p.
15. Zhu Z.Q., Howe D. Halbach Permanent Magnet Machines and Applications: A Review. – IEE Proceedings – Electric Power Applications, 2001, vol. 148, No. 4, pp. 299–308, DOI: 10.1049/ip-epa: 20010479.
16. Talebi D. et al. Design of a Carbon Fiber Rotor in a Dual Rotor Axial Flux Motor for Electric Aircraft. – IEEE Transactions on Industry Applications, 2024, vol. 60, No. 5, pp. 6846–6855, DOI: 10.1109/TIA.2024.3425802.
17. Yun J., Grainger B., Ohodnicki P. A Study on the Performance Improvement of Axial Flux Permanent Magnet Machines Based on Stator Slot Design with Semi-Closed Slots or Magnetic Wedges. – IEEE Transportation Electrification Conf. and Expo, 2024, DOI: 10.1109/ITEC60657.2024.10598883.
18. Xuan H.V., Trong V.N. Effective Electromagnetic Models for the Design of Axial Flux Permanent Magnet Generators in Wind Power. – Engineering Proceedings, 2025, vol. 104, DOI: 10.3390/engproc2025104082.
19. Sergeant P., Vansompel H., Dupré L. Effect of Stator Slot Openings in Axial Flux Permanent Magnet Machines. – Int. Conf. on Modeling and Simulation of Electric Machines, Converters and Systems, 2014, pp. 512–517.
20. Jara W. et al. Rotor Eddy-Current Losses Reduction in an Axial Flux Permanent-Magnet Machine. – IEEE Transactions on Industrial Electronics, 2016, vol. 63, No. 8, pp. 4729–4737, DOI: 10.1109/TIE.2016.2547368.
21. Ismagilov F.R., Vavilov V.E. Vestnik Moskovskogo avia-tsionnogo instituta – in Russ. (Bulletin of the Moscow Aviation Institute), 2017, vol. 24, No. 4, pp. 143–150.
22. Shokrollahi H., Janghorban K. Soft Magnetic Composite Materials (SMCs). – Journal of Materials Processing Technology, 2007, vol. 189, No. 1–3, DOI: 10.1016/j.jmatprotec.2007.02.034.
23. Somaloy, Powders for Electromagnetic Applications [Electron. resource], URL: https://www.hoganas.com/en/powder-technologies/soft-magnetic-composites/products/coated-powders-for-electromagnetic-applications/ (Accessed on 15.02.2026).
24. P400 R Electric Motors [Electron. resource], URL: https://yasa.com/media/2021/05/yasa-p400rdatasheet-rev-14.pdf (Accessed on 25.05.2026).
25. 750 R Electric Motors [Electron. resource], URL: https://yasa.com/media/2021/05/yasa-750rdatasheet-rev-11.pdf (Accessed on 25.05.2026).
26. EMRAX 208 [Electron. resource], URL: https://emrax.com/e-motors/emrax-208/ (Accessed on 25.05.2026).
27. EMRAX 268 [Electron. resource], URL: https://emrax.com/e-motors/emrax-268/ (Accessed on 25.05.2026)
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The study was carried out under the Agreement for the provision of a grant from the federal budget for large scientific projects in priority areas of scientific and technological development of the Ministry of Science and Higher Education of the Russian Federation no. 075-15-2024-552.
