Boyunduruksuz ve Segmentli Armatür tipi Eksenel Akılı Asenkron Motorun, Rotor Bar Sayısı, Malzemesi ve Çalışma Hızı Kapsamında Performans Karşılaştırması

Öz

Bu çalışma literatürde oldukça sınırlı sayıda yer bulan Boyunduruksuz ve Segmentli Armatür tipi (YASA) Eksenel Akılı Asenkron Motor (EAASM) yapısını detaylıca ele almaktadır. Çalışmada, YASA tipi çift rotor mimarisine sahip EAASM, stator yapısı sabit tutularak; alüminyum ve bakır rotor bar malzemesi kullanılarak 5 farklı rotor bar sayısı için 3 farklı çalışma hızında Sonlu Eleman Yöntemleri (SEY) ile analiz edilmiştir. Çalışmanın temel amacı; rotor bar sayısı, rotor bar malzemesi ve çalışma hızı parametrelerinin motor performansı üzerindeki etkilerini sistematik olarak kıyaslamak ve bundan sonra yapılacak çalışmalara da kolaylık sağlamaktır. 6 kutup, 9 stator oluğuna sahip motor 29,31,35,37 ve 41 rotor bar sayısı için hem alüminyum hem de bakır rotor bar malzemesi kullanılarak sınanmıştır. 1000,2000 ve 3000 rpm çalışma hızlarının ele alındığı analizlerde tork, tork dalgalanması, verimlilik ve kayıplar kıyaslanmış olup çok kriterli optimizasyonun yorumlanabilmesi adına Normalize Performans İndeksi ile söz konusu çalışma için optimal motor yapısı belirlenmiştir. Analiz sonuçları rotor bar malzemesi olarak bakır kullanılması durumunda 41 bar yapısının 3 farklı çalışma hızında da en uygun seçim olduğunu, alüminyum kullanılması durumunda ise 1000 rpm için 29 bar yapısının, 2000 ve 3000 rpm hızlarında ise 41 bar konfigürasyonunun optimum rotor oluk sayısı olduğunu göstermektedir. Elde edilen veriler, YASA tipi EAASM tasarımı için yapılacak olan ileriki çalışmalar adına ihtiyaç odaklı parametre optimizasyonuna olanak sağlarken, bu kapsamda araştırmacılara kolaylık sağlayacağı öngörülmektedir.

Anahtar Kelimeler

• Boyunduruksuz ve Segmentli
• Eksenel Akılı Asenkron Motor
• Sonlu Elemanlar Yöntemi

Performance Comparison of a Yokeless and Segmented Armature Type Axial Flux Induction Motor in Terms of Rotor Bar Number, Material, and Operating Speed

Öz

This study provides a detailed examination of the Yokeless and Segmented Armature type (YASA) Axial Flux Induction Motor (AFIM) structure, which is scarcely addressed in the literature. In the study, a YASA-type AFIM with a double-rotor architecture was analyzed using Finite Element Methods (FEM) for five different rotor bar numbers and three operating speeds, while keeping the stator structure constant and employing both aluminum and copper rotor bar materials. The main objective of the study is to systematically compare the effects of rotor bar number, rotor bar material, and operating speed on motor performance, and to provide guidance for future studies. The motor, featuring 6 poles and 9 stator slots, was tested for 29, 31, 35, 37, and 41 rotor bars using both aluminum and copper as rotor bar materials. Analyses at operating speeds of 1000, 2000, and 3000 rpm compared torque, torque ripple, efficiency, and losses. To enable the interpretation of multi-criteria optimization, an Optimal Motor Configuration for this study was determined using a Normalized Performance Index. The results indicate that, when copper is used as the rotor bar material, the 41 bar configuration is the most suitable choice across all three operating speeds. When aluminum is used, the 29 bar configuration is optimal at 1000 rpm, whereas the 41 bar configuration is optimal at 2000 and 3000 rpm. The obtained data provide a foundation for needs-based parameter optimization in future YASA-type AFIM designs, facilitating further research in this field.

Anahtar Kelimeler

• Yokeless and Segmented
• Axial Flux Induction Motor
• Finite Elements Method

Kaynakça

1. [1] De Almeida, A. T., Ferreira, F. J., & Baoming, G. (2013, April). Beyond induction motors—Technology trends to move up efficiency. In 49th IEEE/IAS Industrial & Commercial Power Systems Technical Conference (pp. 1-13). IEEE.
2. [2] Kahourzade, S., Mahmoudi, A., Ravji, R., & Soong, W. L. (2019, September). Line-Start axial-flux PM motors: Introduction of a new machine topology. In 2019 IEEE energy conversion congress and exposition (ECCE) (pp. 7027-7034). IEEE.
3. [3] Amin, S., Khan, S., & Bukhari, S. S. H. (2019, January). A comprehensive review on axial flux machines and its applications. In 2019 2nd International Conference on Computing, Mathematics and Engineering Technologies (iCoMET) (pp. 1-7). IEEE.
4. [4] Mushid, F. C., & Dorrell, D. G. (2017, April). Review of axial flux induction motor for automotive applications. In 2017 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) (pp. 146-151). IEEE.
5. [5] Spooner, E., & Chalmers, B. J. (1988, September). Toroidally-wound, slotless, axial-flux, permanent-magnet, brushless-DC motors. In Proc. International Conference on Electrical Machines (Vol. 3, pp. 81-86).
6. [6] Al-Badi, A., Gastli, A., Bourdoucen, H., & Jervase, J. (2000). Evolution of axial-field electrical machines. Sultan Qaboos University Journal for Science, 5(2), 227-245.
7. [7] Cao, Z., Mahmoudi, A., Kahourzade, S., Soong, W. L., & Summers, J. R. (2020, December). A comparative study of axial-flux versus radial-flux induction machines. In 2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) (pp. 1-6). IEEE.
8. [8] Özsoy, M., Kaplan, O., & Akar, M. (2024). FEM-based analysis of rotor cage material and slot geometry on double air gap axial flux induction motors. Ain Shams Engineering Journal, 15(2), 102393.

9. [9] Dianati, B., Kahourzade, S., & Mahmoudi, A. (2020). Optimization of axial-flux induction motors for the application of electric vehicles considering driving cycles. IEEE Transactions on Energy Conversion, 35(3), 1522-1533.
10. [10] Nobahari, A., Darabi, A., & Hassannia, A. (2017, February). Axial flux induction motor, design and evaluation of steady state modelling using equivalent circuit. In 2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC) (pp. 353-358). IEEE.
11. [11] Cao, Z., Mahmoudi, A., Kahourzade, S., & Soong, W. L. (2021, September). An overview of axial-flux induction machine. In 2021 31st Australasian Universities Power Engineering Conference (AUPEC) (pp. 1-6). IEEE.
12. [12] Nasiri-Gheidari, Z., & Lesani, H. (2012). A survey on axial flux induction motors. Przegląd Elektrotechniczny, 88, 300-305.
13. [13] Mirzaei, M., Mirsalim, M., & Abdollahi, S. E. (2007). Analytical modelling of axial air gap solid rotor induction machines using a quasi-three-dimensional method. IEEE Transactions on Magnetics, 43(7), 3237-3242.
14. [14] Gieras, J. F., Wang, R. J., & Kamper, M. J. (2008). Axial flux permanent magnet brushless machines. Dordrecht: Springer Netherlands.
15. [15] Du-Bar, C. (2011). Design of an axial flux machine for an in-wheel motor application. Chalmers Reproservice, Göteborg, 1-2.
16. [16] Woolmer, T. J., & McCulloch, M. D. (2007, May). Analysis of the Yokeless and segmented armature machine. In 2007 IEEE International Electric Machines & Drives Conference (Vol. 1, pp. 704-708). IEEE.
17. [17] Chang, J., Fan, Y., Zhu, B., Luo, L., Wu, J., Pan, Y., & Kang, P. (2020). Design of a new type Yokeless and segmented armature axial flux machine. International Journal of Applied Electromagnetics and Mechanics, 62(4), 823-834.
18. [18] Taran, N., Klink, D., Heins, G., Rallabandi, V., Patterson, D., & Ionel, D. M. (2021). A comparative study of Yokeless and segmented armature versus single sided axial flux PM machine topologies for electric traction. IEEE Transactions on Industry Applications, 58(1), 325-335.
19. [19] Daut, I., Anayet, K., Gomesh, N., Asri, M., & Irwan, Y. M. (2009, December). Comparison of Copper Rotor Bars with Aluminium Rotor Bars Using FEM Software--A Performance Evaluation. In 2009 Second International Conference on Computer and Electrical Engineering (Vol. 1, pp. 456-459). IEEE.
20. [20] Babypriya, B., & Gomathi, S. (2021). Numerical analysis on impact of choice of number of rotor slots on performance of three phase induction motor. Materials Today: Proceedings, 45, 2364-2370.
21. [21] Gyftakis, K. N., & Kappatou, J. (2013). The impact of the rotor slot number on the behaviour of the induction motor. Advances in Power Electronics, 2013(1), 837010.
22. [22] Lordoglu, A., Gulbahce, M. O., & Kocabas, D. A. (2021). A comprehensive disturbing effect analysis of multi-sectional rotor slot geometry for induction machines in electrical vehicles. IEEE Access, 9, 49590-49600.
23. [23] Mushid, F. C., & Dorrell, D. G. (2017, April). Review of axial flux induction motor for automotive applications. In 2017 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) (pp. 146-151). IEEE
24. [24] Evans, P. D., Brown, D., & Eastham, J. F. (1987, August). A study of permanent magnet disc motor design. In BICEM Proceedings (pp. 729-732).
25. [25] Spooner, E., & Chalmers, B. J. (1992, November). ‘TORUS’: A slotless, toroidal-stator, permanent-magnet generator. In IEE Proceedings B (Electric Power Applications) (Vol. 139, No. 6, pp. 497-506). IEE
26. [26] Finley, W. R., & Hodowanec, M. M. (2002). Selection of copper versus aluminium rotors for induction motors. IEEE Transactions on Industry Applications, 37(6), 1563-1573.
27. [27] Akçomak, M., & Partal, S. Z. Çift Kafesli Rotorda Alüminyum ve Bakırın Birlikte Kullanımının Asenkron Motor Verimine Etkisinin İncelenmesi. EMO Bilimsel Dergi, 12(2), 15-25.
28. [28] Momin, A. (2024). Review of Electrical Steels with their Properties and Recent Trends for Improvement. Technology, 17(41), 4270-4286.
29. [29] Gundogdu, T., Komurgoz, G., & Mantar, B. (2014, April). Implementation of fractional slot concentrated windings to induction machines. In 7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014) (pp. 1-6). IET.
30. [30] Cros, J., & Viarouge, P. (2002). Synthesis of high performance PM motors with concentrated windings. IEEE transactions on energy conversion, 17(2), 248-253.
31. [31] El-Refaie, A. M., & Jahns, T. M. (2004, October). Optimal flux weakening in surface PM machines using concentrated windings. In Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting. (Vol. 2, pp. 1038-1047). IEEE.
32. [32] Zhu, Z. Q., & Howe, D. (1997, May). Winding inductances of brushless machines with surface-mounted magnets. In 1997 IEEE International electric machines and drives conference record (pp. WB2-2). IEEE.
33. [33] Reddy, P. B., Jahns, T. M., & El-Refaie, A. M. (2008, October). Impact of winding layer number and slot/pole combination on AC armature losses of synchronous surface PM machines designed for wide constant-power speed range operation. In 2008 IEEE Industry Applications Society Annual Meeting (pp. 1-8). IEEE.
34. [34] Bitsi, K., Beniakar, M. E., Wallmark, O., & Bosga, S. G. (2020, August). Preliminary electromagnetic sizing of axial-flux induction machines. In 2020 International Conference on Electrical Machines (ICEM) (Vol. 1, pp. 284-290). IEEE.
35. [35] Keskin Arabul, F., Senol, I., & Oner, Y. (2020). Performance analysis of axial-flux induction motor with skewed rotor. Energies, 13(19), 4991.
36. [36] Woolmer, T. J. T. (2009). The Yokeless and segmented armature machine developed for the LIFECar (Doctoral dissertation, University of Oxford).
37. [37] Aslaner, H., & Akar, M. “Boyunduruksuz ve Segmentli Armatür tipi Eksenel Akılı Asenkron Motorun 2 Boyutlu ve 3 Boyutlu Sonlu Eleman Modelleme Sonuçlarının Karşılaştırılması,” in Proc. 6th International Conference on Recent Academic Studies (ICRAS), pp. 5–18, 2026.
38. [38] Colombo, L. (2021). Electromagnetic sizing of axial-flux induction machines and experimental validation.
39. [39] Yan, B., Li, X., Sun, Y., & Tan, Y. (2023). End Effect Equivalence in the 2-D Finite Element Analysis of a Line-Start Permanent Magnet Synchronous Motor with Hybrid Solid Rotor. Energies, 16(19), 6766
40. [40] Lipo, T. A. (1988). Recent progress in the development in solid-state AC motor drives. IEEE Transactions on Power Electronics, 3(2), 105-117.
41. [41] Bose, B. K. (2005). Adjustable speed ac drives—A technology status review. Proceedings of the IEEE, 70(2), 116-135.
42. [42] Syed, Q. A. S., Laghari, I. A., Ali, A., Samo, K. A., & Soomro, Z. (2025). Steady state electromagnetic analysis of the squirrel cage induction motor. Spectrum of Engineering Sciences, 1353-1360.
43. [43] Kirtley, J. L., Cowie, J. G., Brush, E. F., Peters, D. T., & Kimmich, R. (2007, June). Improving induction motor efficiency with die-cast copper rotor cages. In 2007 IEEE Power Engineering Society General Meeting (pp. 1-6). IEEE.
44. [44] Zhao, A., Chen, H., Boßer, C., & Leksell, M. (2024). FEM and CFD thermal modelling of an axial-flux induction machine with experimental validation. Case Studies in Thermal Engineering, 53, 103879.
45. [45] Valtonen, M. (2007). Performance characteristics of an axial-flux solid-rotor-core induction motor. Lappeenranta University of Technology.
46. [46] Bertotti, G. (1988). General properties of power losses in soft ferromagnetic materials. IEEE Transactions on magnetics, 24(1), 621-630.
47. [47] Duan, Y., Zhao, J., Xiong, Y., Wang, H., & Tian, J. (2025). Study on Eddy Current Loss Characteristics and Multi-Objective Optimization of High-Speed Solid Rotor Induction Motors. Electronics, 14(20), 4085.
48. [48] Özsoy, M., Kaplan, O., & Akar, M. (2023). Implementation of Different 2D Finite Element Modelling Approaches in Axial Flux Induction Motors. Electric Power Components and Systems, 51(19), 2385-2396.
49. [49] Wang, Q., Wang, J., & Geng, W. (2024, November). Equivalent two-dimensional finite element analysis of axial flux induction motor with double stator and single rotor. In 2024 27th International Conference on Electrical Machines and Systems (ICEMS) (pp. 2556-2562). IEEE.
50. [50] Gerçekcioğlu, H. S., & Akar, M. (2021). Efficiency and performance comparison between synchronous reluctance and induction motor in axial flux concept. Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji, 9(2), 297-316.
51. [51] Montero, M. A. T., Garces, A. E. H., Ladino, J. A. T., & Collao, R. R. W. (2017). Simulation and analysis of an axial flux induction machine. IEEE Latin America Transactions, 15(7), 1263-1269.
52. [52] Gundogdu, T. (2018). Advanced non-overlapping winding induction machines for electrical vehicle applications (Doctoral dissertation, University of Sheffield).
53. [53] Huang, P., Li, H., & Yang, C. (2021, February). A Yokeless axial flux induction motor for electric vehicles based on grain-oriented silicon steel. In Journal of Physics: Conference Series (Vol. 1815, No. 1, p. 012042). IOP Publishing.