Document Type : Research paper

Authors

Department of Electrical Engineering, Malayer University, Malayer, Iran.

Abstract

This research paper focuses on the optimal configuration of an outer rotor permanent magnet brushless DC (ORBLDC) motor. As torque ripple is a drawback associated with this type of motor, the study proposes an optimal design to minimize torque fluctuations. The proposed design approach considers factors such as slot width, pole arc (pole span), the number of slots, and the least common multiple factors between the number of poles and slots. Initially, the machine's parameters and dimensions are determined using design equations, and then different configurations are evaluated using the finite element method to achieve reduced torque fluctuations. The findings demonstrate that the combined design methods employed effectively minimize output torque ripples. Considering various design factors and employing advanced optimal techniques can contribute to the development of more efficient and reliable motor designs as well as reducing torque ripples.

Keywords

Main Subjects

  1. J. F. Gieras, Permanent magnet motor technology: design and applications. CRC press, 2009.
  2. Y. Song, G. Liu, S. Yu, H. Wang, and F. Zhang, “Investigation of a low-speed high-torque-density direct-drive external-rotor pmsm for belt conveyor application,” IEEE Access, 2023.
  3. T.-Y. Lee, M.-K. Seo, Y.-J. Kim, and S.-Y. Jung, “Motor design and characteristics comparison of outer-rotor-type bldc motor and blac motor based on numerical analysis,” IEEE Trans. Appl. Supercond., vol. 26, no. 4, pp. 1–6, 2016.
  4. A. Abdoos, M. Moazzen, and S. Hosseini, “Optimal design of an exterior-rotor permanent magnet generator for wind power applications,” J. Oper. Autom. Power Eng., vol. 9, no. 3, pp. 193–202, 2021.
  5. M. Amirkhani, M. A. Ghanbari, M. A. J. Kondelaji, M. Mirsalim, and A. Khorsandi, “Performance analysis of outer rotor multi-tooth biased flux permanent magnet motors,” IEEE Trans. Energy Convers., 2023.
  6. Y. ÖZOGLU, “New magnet shape for reducing torque ripple˘ in an outer-rotor permanent-magnet machine,” Turk. J. Electr. Eng. Comput. Sci., vol. 25, no. 5, pp. 4381–4397, 2017.
  7. H. Masoudi, A. Kiyoumarsi, S. M. Madani, and M. Ataei, “Torque ripple reduction of non-sinusoidal brushless dc motor based on super-twisting sliding mode direct power control,” IEEE Trans. Transp. Electrif., 2023.
  8. S. Hajiaghasi, Z. Rafiee, A. Salemnia, and M. Aghamohammadi, “Optimal sensorless four switch direct power control of bldc motor,” J. Oper. Autom. Power Eng., vol. 7, no. 1, pp. 78–89, 2019.
  9. A. Dejamkhooy and A. Ahmadpour, “Torque ripple reduction of the position sensor-less switched reluctance motors applied in the electrical vehicles,” J. Oper. Autom. Power Eng., vol. 11, no. 4, pp. 258–267, 2023.
  10. D. Liao, L. Yu, and Z. Liu, “A torque ripple reduction method using field current injection for doubly salient motor,” Energy Rep., vol. 8, pp. 573–581, 2022.
  11. S. K. Neogi and K. Chatterjee, “A modified brush-less dc motor having high torque density and its simplified current control technique,” IEEE Trans. Ind. Electron., 2022.
  12. H. Sun, G. Krebs, I. Bahri, P. Rodriguez-Ayerbe, and M. Khanchoul, “Pmsm design optimization concerning sensorless performance and torque ripple,” E-Prime-Adv. Electr. Eng. Electron. Energy, vol. 2, p. 100049, 2022.
  13. I.-H. Jo, J. Lee, H.-W. Lee, J.-B. Lee, J.-H. Lim, S.-H. Kim, and C.-B. Park, “Analysis of optimal rotors skew to improve the total harmonic distortion of back electromotive force in mg-pmsm for traction,” IEEE Access, vol. 11, pp. 122231–122237, 2023.
  14. C.-M. Lee, H.-S. Seol, J.-y. Lee, S.-H. Lee, and D.-W. Kang, “Optimization of vibration and noise characteristics of skewed permanent brushless direct current motor,” IEEE Trans. Magn., vol. 53, no. 11, pp. 1–5, 2017.
  15. E. Brescia, M. Palmieri, P. R. Massenio, G. L. Cascella, and F. Cupertino, “Cogging torque suppression of modular permanent magnet machines using a semi-analytical approach and artificial intelligence,” IEEE Access, 2023.
  16. J. Chen and S. Ding, “Investigation on the influence of slot dimensions of spmsm on electromagnetic force,” in 2023 26th Int. Conf. Electr. Mach. Syst. (ICEMS), pp. 1561–1565, IEEE, 2023.
  17. O. Tosun and N. Serteller, “Analysis of brushless direct current motor stator slot geometry and winding type with fem,” in Proc. 3rd Int. Symp. Multidiscip. Stud. Innovative Technol. (ISMSIT), Ankara, Turkey, pp. 20–22, 2019.
  18. M. Toren, “Determination of the performance parameters of a gearless direct-drive inner-rotor pmbldc motor via different slot–magnet combinations,” Iran. J. Sci. Technol. Trans. Electr. Eng., vol. 48, no. 1, pp. 127–142, 2024.
  19. Z. Xing, W. Zhao, X. Wang, and Y. Sun, “Reduction of radial electromagnetic force waves based on pm segmentation in spmsms,” IEEE Trans. Magn., vol. 56, no. 2, pp. 1–7, 2020.
  20. T. Jhankal and A. N. Patel, “Design and cogging torque reduction of radial flux brushless dc motors with varied permanent magnet pole shapes for electric vehicle application,” Trans. Energy Syst. Eng. Appl., vol. 4, no. 2, pp. 1–13, 2023.
  21. Z. S. Du and T. A. Lipo, “High torque density and low torque ripple shaped-magnet machines using sinusoidal plus third harmonic shaped magnets,” IEEE Trans. Ind. Appl., vol. 55, no. 3, pp. 2601–2610, 2019.
  22. S. B. Bae, D. S. Choi, and S. G. Min, “Artificial hunting optimization: A novel method for design optimization of permanent magnet machines,” IEEE Trans. Transp. Electrif., 2023.
  23. G. Bramerdorfer, “Multiobjective electric machine optimization for highest reliability demands,” CES Trans. Electr. Mach. Syst., vol. 4, no. 2, pp. 71–78, 2020.
  24. D. C. Hanselman, Brushless permanent magnet motor design. The Writers’ Collective, 2003.