Synchronous Reluctance Motors (SRMs) are defined as reliable electric motors. Although the history of this type of motor dates back a very long time, their usage areas have started to increase with the developments in power electronics in recent years. While they have advantages such as their simple structure and their ability to operate at high speeds, the biggest disadvantages of these motors are the torque ripple (torque pulses) that occur at low speeds and the acoustic noise caused by this disturbance. One of the methods used to overcome this problem is the formation of a skew in the rotor structure. In this study, in addition to the traditional skewing method, a different degree of skew is created by creating a unique skew shape and compared with the normal motor topology. The analyses are carried out using Finite Element Method (FEM). The results obtained are given in detail.

Keywords - SRM, tork ripple, skew, FEM

[1] M. Ehsani, “Switched reluctance motor drives — recent advances,” Sadhana 1997 226, vol. 22, no. 6, pp. 821–836, 1997, doi: 10.1007/BF02745847.

[2] M. F. S. Pereira, A. Mamede, R. E. Araújo, M. F. S. Pereira, A. Mamede, and R. E. Araújo, “Switched Reluctance Motor Drives: Fundamental Control Methods,” Model. Control Switch. Reluctance Mach., Sep. 2020, doi: 10.5772/INTECHOPEN.90476.

[3] J.-W. Ahn and G. F. Lukman, “Switched reluctance motor: Research trends and overview,” CES Trans. Electr. Mach. Syst., vol. 2, no. 4, pp. 339–347, Jan. 2019, doi:
10.30941/CESTEMS.2018.00043.

[4] I. Husain and M. Ehsani, “Torque ripple minimization in switched reluctance motor drives by PWM current control,” IEEE Trans. Power Electron., vol. 11, no. 1, pp. 83–88, 1996, doi: 10.1109/63.484420.

[5] J. F. G. Shahgholian, Alireza Sahafi, “(PDF) Torque ripple reduction in switched reluctance motors -A review,” ELECTROMOTION, vol. 22, no. 2015, pp. 35–56, 2015, Accessed: Nov. 30, 2022. [Online]. Available: https://www.researchgate.net/publication/348407711_Torque_ripple_reduction_in_switched_reluctance_motors_-A_review.

[6] G. Velmurugan, S. Bozhko, and T. Yang, “A Review of Torque Ripple Minimization Techniques in Switched Reluctance Machine,” 2018 IEEE Int. Conf. Electr. Syst. Aircraft, Railw. Sh. Propuls. Road Veh. Int. Transp. Electrif. Conf. ESARS-ITEC 2018, Jan. 2019, doi: 10.1109/ESARS-ITEC.2018.8607614.

[7] Z. Q. Zhu, B. Lee, L. Huang, and W. Chu, “Contribution of Current Harmonics to Average Torque and Torque Ripple in Switched Reluctance Machines,” IEEE Trans. Magn., vol. 53, no. 3, Mar. 2017, doi: 10.1109/TMAG.2016.2633477.

[8] M. N. Anwar, I. Husain, and A. V. Radun, “A comprehensive design methodology for switched reluctance machines,” IEEE Trans. Ind. Appl., vol. 37, no. 6, pp. 1684–1692, Nov. 2001, doi: 10.1109/28.968179.

[9] A. D.-C. Baldu´ı Blanqu´, “(PDF) Torque ripple minimization for a Switched Reluctance Motor,” in Proc. European Conf. Power Electronics Applications(EPE2009), 2009, pp. 1–8, Accessed: Nov. 30, 2022. [Online]. Available: https://www.researchgate.net/publication/44381409_Torque_ripple_minimization_for_a_Switched_Reluctance_Motor.

[10] J. Ye, B. Bilgin, and A. Emadi, “An extended-speed low-ripple torque control of switched reluctance motor drives,” IEEE Trans. Power Electron., vol. 30, no. 3, pp. 1457–1470, 2015, doi: 10.1109/TPEL.2014.2316272.

[11] A. K. Rana and A. V. Raviteja, “A Mathematical Torque Ripple Minimization Technique Based on Nonlinear Modulating Factor for Switched Reluctance Motor Drives,” IEEE Trans. Ind. Electron., 2021, doi: 10.1109/TIE.2021.3063871.

[12] E. F. I. Raj, M. Appadurai, E. F. I. Rani, and I. Jenish, “Finiteelement design and analysis of switched reluctance motor for automobile applications,” Multiscale Multidiscip. Model. Exp. Des., vol. 5, no. 3, pp. 269–277, Sep. 2022, doi: 10.1007/S41939-022-00119-8/TABLES/3.

[13] G. Guidkaya, E. D. K. Fankem, and J. Y. Effa, “A New Rotor Shape Design of 6/2 Switched Reluctance Motor: Comparative Analysis of its Chaotic Behavior with Other Structures,” J. Electr. Eng. Technol., vol. 16, no. 1, pp. 309–320, Jan. 2021, doi: 10.1007/S42835-020-00574-8/FIGURES/23.

[14] M. Deepak, G. Janaki, and J. Mounica, “Investigation on airgap selection for switched reluctance motor on low power electric vehicles,” Mater. Today Proc., vol. 64, pp. 255–260, Jan. 2022, doi: 10.1016/J.MATPR.2022.04.480.

[15] P. Ren, J. Zhu, Z. Jing, Z. Guo, and A. Xu, “Minimization of torque ripple in switched reluctance motor based on MPC and TSF,” IEEJ Trans. Electr. Electron. Eng., vol. 16, no. 11, pp. 1535–1543, Nov. 2021, doi: 10.1002/TEE.23458.

[16] E. Bostanci, M. Moallem, A. Parsapour, and B. Fahimi, “Opportunities and Challenges of Switched Reluctance Motor Drives for Electric Propulsion: A Comparative Study,” IEEE Trans. Transp. Electrif., vol. 3, no. 1, pp. 58–75, Mar. 2017, doi: 10.1109/TTE.2017.2649883.

[17] Xin Kai, Zhan Qionghua, and Luo Jianwu, “A new simple sensorless control method for switched reluctance motor drives,” 2005 Int. Conf. Electr. Mach. Syst., pp. 594-598 Vol. 1, 2005, doi: 10.1109/ICEMS.2005.202599.

[18] X. D. Xue, K. W. E. Cheng, and S. L. Ho, “Optimization and evaluation of torque-sharing functions for torque ripple minimization in switched reluctance motor drives,” IEEE Trans. Power Electron., vol. 24, no. 9, pp. 2076–2090, 2009, doi: 10.1109/TPEL.2009.2019581.

[19] A. Yildiz, M. Polat, and M. T. Özdemir, “Design Optimization of Inverted Switched Reluctance Motor using Ant Colony Optimization Algorithm,” 2018 Int. Conf. Artif. Intell. Data Process. IDAP 2018, Jan. 2019, doi: 10.1109/IDAP.2018.8620923.