Performance Improvement of the Hybrid Switch Reluctance Motor by Notching Method

Document Type : Article


1 Department of Electrical and Computer Engineering, Qom University of Technology, Qom, Iran

2 Department of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran andMazandaran Regional Electric Company, Sari, Iran


Hybrid switch reluctance motors are the family of switch reluctance motors (SRMs) that attenuate the magnetic saturation and increase the air gap magnetic flux by exploiting permanent magnets. The permanent magnet auxiliary air gap flux can affect the average torque and ripple. Commonly, the torque ripples reduction comes with the average torque drop. In this paper, the torque ripple reduction and average torque improvement are achieved for a 6/10 pole hybrid switch reluctance motor by inserting two symmetrical notches on its rotor. Also, the lengths of magnet and rectangular notches are optimized by the finite element method and sensitivity analysis. The comparison of the optimized design with the initial one carried out by finite element proves the efficiency of the proposed model.



[1]  Bartolo, J.B., Degano, M., Espina, J., et al. “Design and initial testing of a high-speed 45-kW switched reluctance drive for aerospace application”, IEEE Trans. Ind. Electron., 64(2), pp. 988–997 (2017).
[2]  Bostanci, E., Moallem, M., Parsapour, A., et al. “Opportunities and challenges of switched reluctance motor drives for electric propulsion: A comparative study”, IEEE Trans. Transp. Electrif., 3(1), pp. 58–75 (2017).
[3]  Naseh, M., Hasanzadeh, S., Dehghan, et al. “Optimized design of rotor barriers in pm-assisted synchronous reluctance machines with taguchi method”, IEEE Access, 10, 38165–38173 (2022).
[4]  Ding, W., Hu, Y., Wang, T., et al. “Comprehensive research of modular E-core stator hybrid-flux switched reluctance motors with segmented and nonsegmented rotors”, IEEE Trans. Energy Convers., 32(1), pp. 382–393 (2017).
[5]  Ding, W., Yang, S. and Hu, Y. “Development and investigation on segmented-stator hybrid-excitation switched reluctance machines with different rotor pole numbers”, IEEE Trans. Ind. Electron., 65(5), pp. 3784–3794 (2018).
[6]  Ding, W., Yang, S., Hu, Y., et al. “Design consideration and evaluation of a 12/8 high-torque modular-stator hybrid excitation switched reluctance machine for EV applications”, IEEE Trans. Ind. Electron., 64(12), pp. 9221–9232 (2017).
[7]  Shirali, E., Hasanzadeh, S. and Dehghan, S.M. “FEM-aided analytical model and control of SSLFSM thrust force”, Comput. Intell. Electr. Eng., 11(2), pp. 87–94 (2020).
[8]  Mousavi-Aghdam, S.R., Feyzi, M.R., Bianchi, N., et al. “Design and analysis of a novel high-torque stator-segmented SRM”, IEEE Trans. Ind. Electron., 63(3), pp. 1458–1466 (2016).
[9]  Zhu, J., Cheng, K.W.E. and Xue, X. “Design and analysis of a new enhanced torque hybrid switched reluctance motor”, IEEE Trans. Energy Convers., 33(33), pp. 1965–1977 (2018).
[10]      Diao, K., Sun, X., Lei, G., et al. “Multimode optimization of switched reluctance machines in hybrid electric vehicles”, IEEE Trans. Energy Convers., 36, 2217–2226 (2021).
[11]      Mehta, S., Kabir, M.A., Pramod, P., et al. “Segmented Rotor Mutually Coupled Switched Reluctance Machine for Low Torque Ripple Applications”, IEEE Trans. Ind. Appl., 57(4), pp. 3582–3594 (2021).
[12]      Xiang, Z., Quan, L. and Zhu, X. “A new partitioned-rotor flux-switching permanent magnet motor with high torque density and improved magnet utilization”, IEEE Trans. Appl. Supercond., 26(4), pp. 1–5 (2016).
[13]      Sikder, C., Husain, I. and Ouyang, W. “Cogging torque reduction in flux-switching permanent-magnet machines by rotor pole shaping”, IEEE Trans. Ind. Appl., 51(5), pp. 3609–3619 (2015).
[14]Esfahanian, H.R., Hasanzadeh, S., Heydari, M., et al. “Design, Optimization, and Control of a Linear Tubular Machine Integrated with Levitation and Guidance for Maglev Applications”, Sci. Iran., (2021).
[15]      Hasanzadeh, S., Rezaei, H. and Qiyassi, E. “Analysis and optimization of permanent magnet dimensions in electrodynamic suspension systems”, J. Electr. Eng. Technol., 13(1), pp. 307–314 (2018).