Examination of Cogging Torque for Surface Mounted PMSM with Outer Rotor

Year 2021, Issue: 24, 284 - 288, 15.04.2021

Mümtaz Mutluer

https://doi.org/10.31590/ejosat.898903

Abstract

One of the most important structural problems for permanent magnet synchronous motors is the cogging torque. One of the most effective ways to reduce the cogging torque is that magnets or slots are skewed. However, this will negatively affect the motor cost and production time. On the other hand, the cogging torque depends on the change in the reluctance of the motor in the air gap during operation. Therefore, the most important design approach to reduce the cogging torque is to examine the parameters that affect the air gap reluctance. In this study, the change of air gap reluctance of surface mounted permanent magnet synchronous motor with outer rotor during operation is investigated. For this purpose, the five most important parameters affecting the air gap reluctance change are selected. In this way, the best motor model with low cogging torque is tried to be obtained.

Keywords

Air-gap reluctance, Cogging torque, Outer rotor, Permanent magnet synchronous motor

Dış Rotorlu Yüzeye Monte PMSM için Vuruntu Momentinin İncelenmesi

Abstract

Sabit mıknatıslı senkron motorlar için en önemli yapısal sorunlardan biri vuruntu momentidir. Vuruntu momentini azaltmanın en etkili yollarından biri, mıknatısların veya olukların kaykılı olmasıdır. Ancak bu işlem, motor maliyetini ve üretim süresini olumsuz etkileyecektir. Öte yandan, vuruntu momenti, çalışma sırasında motorun hava boşluğundaki relüktans değişimine bağlıdır. Bu nedenle vuruntu momentini azaltmak için en önemli tasarım yaklaşımı, hava boşluğu relüktansını etkileyen parametreleri incelemektir. Bu çalışmada, dış rotorlu yüzeye monte sabit mıknatıslı senkron motorun hava boşluğu relüktansının çalışma sırasında değişimi incelenmiştir. Bu amaçla, hava boşluğu relüktans değişimini etkileyen en önemli beş parametre seçilmiştir. Bu sayede düşük vuruntu momentane sahip en iyi motor modeli elde edilmeye çalışılmıştır.

Keywords

Hava boşluğu relüktansı, Vuruntu momenti, Dış rotor, Kalıcı mıknatıslı senkron motor

References

• Mutluer, M., Şahman, M. A. and Çunkaş, M. (2020). Heuristic optimization based on penalty approach for surface permanent magnet synchronous machines. Arabian J. Sci. Eng., vol. 45, no. 8, pp. 6751-6767.
• Yetiş, H., Meşe E. and Bıyıklı, M. (2018). Design and comparison of ferrite based IPM and NdFeB based SPM synchronous motors for gearless elevator systems. XIII International Conference on Electrical Machines (ICEM).
• Tükenmez Ergene, L., Polat, A. and Bakhtiarzadeh, H. (2018). Design of a permanent magnet synchronous motor used in elevators. Journal of the Faculty of Engineering and Architecture of Gazi University 33:2, pp. 757-770.
• Hanselman, D. C. (2006). Brushless permanent magnet motor design. Magna Physics Publishing.
• Guemes, J. A., Iraolagoitia, A. M., Donsion, M. P. and Del Hoyo, J. I. (2008). Analysis of torque in permanent magnet synchronous motors with fractional slot windings. 18th International Conference on Electrical Machines.
• Meier, F. (2008). Permanent-magnet synchronous machines with non-overlapping concentrated windings for low-speed direct-drive applications. Doctoral Thesis, KTH Royal Institute of Technology, Stockholm.
• Herlina, Setiabudy, R. and Rahardjo, A. (2017). Cogging torque reduction by modifying stator teeth and permanent magnet shape on a surface mounted PMSG. International Seminar on Intelligent Technology and Its Application, pp. 227-232.
• Sempere, V. S., Payán, M. B., and Bueno, J. R. C. (2017). Cogging torque cancellation by magnet shaping in surface-mounted permanent-magnet motors. IEEE Transactions on Magnetics, Vol. 53, No. 7.
• Saxena, A. and Fernandes, B. G. (2015). Noise and cogging torque reduction in brushless dc ceiling fan. 18th International Conference on Electrical Machines and Systems (ICEMS).
• Talay, T. and Erkan, K. (2019). Axial flux permanent magnet motor design and optimisation by using artificial neural networks. Xjenza Online, 7:28-36.