Investigation Effect of Magnet Skew on Thrust Force in Linear Brushless Direct Current Motor with FEM

Yıl 2022, Cilt: 6 Sayı: 2, 156 - 165, 31.12.2022

Mustafa Eker

https://doi.org/10.47897/bilmes.1220672

Öz

This study is concerned with the reduction of ripple in the thrust force produced in a linear Brushless Direct Current Motor (BLDC). To reduce the ripples in the generated thrust force, different methods such as structural solutions are applied both in the control part and in the production phase of the motor. In this study, skew application, which is one of the mechanical methods, is proposed. For this reason, the changes in the thrust force of a BLDC motor with a surface magnet-placed translator are investigated by applying different levels of skew to the magnets. First, a 3D solid model of the motor was created. A pole on the translator of the linear BLDC motor is composed of 3 equal magnet groups. For each skew level, the magnets were shifted 3 mm independently of each other and the thrust force values were examined. For this process, a 3D magnetostatic analysis of the linear BLDC motor was performed. The results obtained show that the skewing process applied to the magnets reduces the ripples in the thrust curve up to a certain point, after which no significant improvement in the ripple is observed, while the average force value decreases significantly.

Anahtar Kelimeler

Linear BLDC, Thrust force, ripple, step skew

Kaynakça

• [1] A. Barış, M. Güleç, Y. Demir, and M. Aydın, “Electromagnetic Design and Analysis of Permanent Magnet Linear Synchronous Motor,” in Ulusal Elektrik Enerjisi Dönüşümü Kongresi, Jul. 2017, pp. 1–6, doi: 10.3390/en15155441.
• [2] C. Krämer, A. Kugi, and W. Kemmetmüller, “Modeling of a permanent magnet linear synchronous motor using magnetic equivalent circuits,” Mechatronics, vol. 76, Jun. 2021, doi: 10.1016/J.MECHATRONICS.2021.102558.
• [3] I. Boldea, M. Pucci, and W. Xu, “Design and Control for Linear Machines, Drives, and MAGLEVs - Part II,” IEEE Trans. Ind. Electron., vol. 65, no. 12, pp. 9801–9803, Dec. 2018, doi: 10.1109/TIE.2018.2849761.
• [4] I. Boldea, “Linear Electric Machines, Drives, and MAGLEVs Handbook,” CRC Press, pp. 1–646, Jan. 2013, doi: 10.1201/B13756.
• [5] I. Eguren, G. Almandoz, A. Egea, G. Ugalde, and A. J. Escalada, “Linear Machines for Long Stroke Applications - A Review,” IEEE Access, vol. 8, pp. 3960–3979, 2020, doi: 10.1109/ACCESS.2019.2961758.
• [6] S. Chevailler, “(PDF) Comparative study and selection criteria of linear motors,” ÉCOLE POLYTECHNIQUE FÉDÉRALE DE LAUSANNE, 2006.
• [7] J. Wang, W. Wang, K. Atallah, and D. Howe, “Comparative studies of linear permanent magnet motor topologies for active vehicle suspension,” 2008 IEEE Veh. Power Propuls. Conf. VPPC 2008, 2008, doi: 10.1109/VPPC.2008.4677550.
• [8] S. Vaez-Zadeh and A. H. Isfahani, “Multiobjective optimization of air-core linear permanent magnet synchronous motors for improved thrust and low magnet consumption,” ICEMS 2005 Proc. Eighth Int. Conf. Electr. Mach. Syst., vol. 1, pp. 226–229, 2005, doi: 10.1109/ICEMS.2005.202517.
• [9] S. G. Lee, S. A. Kim, S. Saha, Y. W. Zhu, and Y. H. Cho, “Optimal structure design for minimizing detent force of PMLSM for a ropeless elevator,” IEEE Trans. Magn., vol. 50, no. 1, 2014, doi: 10.1109/TMAG.2013.2277544.
• [10] C. F. Wang, J. X. Shen, Y. Wang, L. L. Wang, and M. J. Jin, “A new method for reduction of detent force in permanent magnet flux-switching linear motors,” IEEE Trans. Magn., vol. 45, no. 6, pp. 2843–2846, 2009, doi: 10.1109/TMAG.2009.2018689.
• [11] W. Ullah, F. Khan, N. Ullah, M. Umair, B. Khan, and H. A. Khan, “Comparative Study between C-Core/E-Core SFPMM with Consequent Pole SFPMM,” RAEE 2019 - Int. Symp. Recent Adv. Electr. Eng., Aug. 2019, doi: 10.1109/RAEE.2019.8886946.
• [12] Y. Du, G. Yang, L. Quan, X. Zhu, F. Xiao, and H. Wu, “Detent Force Reduction of a C-Core Linear Flux-Switching Permanent Magnet Machine with Multiple Additional Teeth,” Energies 2017, Vol. 10, Page 318, vol. 10, no. 3, p. 318, Mar. 2017, doi: 10.3390/EN10030318.
• [13] W. Hao and Y. Wang, “Comparison of the Stator Step Skewed Structures for Cogging Force Reduction of Linear Flux Switching Permanent Magnet Machines,” Energies 2018, Vol. 11, Page 2172, vol. 11, no. 8, p. 2172, Aug. 2018, doi: 10.3390/EN11082172.
• [14] M. Eker, “Adaptive drive element for PV panel cleaning system: linear BLDC motor,” Electr. Eng., Nov. 2022, doi: 10.1007/S00202-022-01680-8.
• [15] Poorina Norouzi, “High performance position control of double sided air core linear brushless DC motor,” 2015.
• [16] O. Ustun, O. C. Kivanc, and M. S. Mokukcu, “A linear brushless direct current motor design approach for seismic shake tables,” Appl. Sci., vol. 10, no. 21, pp. 1–13, Nov. 2020, doi: 10.3390/APP10217618.
• [17] XIN GE, “Simulation of Vibrations in Electrical Machines for Hybrid-electric Vehicles,” p. 56 p., 2014.
• [18] J. J. Cai, Q. Lu, X. Huang, and Y. Yes, “Thrust ripple of a permanent magnet LSM with step skewed magnets,” IEEE Trans. Magn., vol. 48, no. 11, pp. 4666–4669, 2012, doi: 10.1109/TMAG.2012.2198437.
• [19] X. Z. Huang, J. Li, C. Zhang, Z. Y. Qian, L. Li, and D. Gerada, “Electromagnetic and Thrust Characteristics of Double-sided Permanent Magnet Linear Synchronous Motor Adopting Staggering Primaries Structure,” IEEE Trans. Ind. Electron., vol. 66, no. 6, pp. 4826–4836, Jun. 2019, doi: 10.1109/TIE.2018.2860526.
• [20] K. C. Lim, J. K. Woo, G. H. Kang, J. P. Hong, and G. T. Kim, “Detent force minimization techniques in permanent magnet linear synchronous motors,” IEEE Trans. Magn., vol. 38, no. 2 I, pp. 1157–1160, 2002, doi: 10.1109/20.996296.
• [21] Y. W. Zhu and Y. H. Cho, “Thrust ripples suppression of permanent magnet linear synchronous motor,” IEEE Trans. Magn., vol. 43, no. 6, pp. 2537–2539, 2007, doi: 10.1109/TMAG.2007.893308.