Double-stator switched reluctance motors (DSSRMs) acquire attention because of their high torque/power generating capability compared to conventional and segmented rotor switched reluctance motors. One of the main limiting performance indices of such motors for industrial applications is its high torque ripple. This paper proposes a 12/10/12 pole DSSRM with an angular shift of half of the stroke angle between inner and outer stators. The respective phase windings of the inner and outer stators are parallelly excited with the same phase angle shift to reduce the torque ripple. Each rotor segment is constructed with a pair of half rotor segments that are isolated from each other through the insertion of a non-magnetic isolator between them. Firstly, the design hypothesis for a low torque ripple DSSRM has been presented; thereafter, some geometric modifications have been suggested and investigated to obtain a nearby response in the proposed DSSRM. The calculation of the width of the non-magnetic isolator, modification in the pole height of outer stator and modification in the arc angles of rotor segments/stator poles are discussed in detail. The effectiveness of the proposed motor is investigated through a 2D finite-element modelling and simulation in ANSYS/MAXWELL software. Simulation results show that the torque ripple is significantly reduced by 74.9% in the proposed DSSRM compared to the baseline DSSRM.
2. Gerada, D., A. Mebarki, N. L. Brown, C. Gerada, A. Cavagnino, and A. Boglietti, "High-speed electrical machines: Technologies, trends, and developments," IEEE Transactions on Industrial Electronics, Vol. 61, No. 6, 2946-2959, June 2014.
3. Ling, X., B. Li, L. Gong, Y. Huang, and C. Liu, "Simulation of switched reluctance motor drive system based on multi-physics modeling method," IEEE Access, Vol. 5, 26184-26189, 2017.
4. Han, G., H. Chen, and G. Guan, "Low-cost SRM drive system with reduced current sensors and position sensors," IET Electric Power Applications, Vol. 13, No. 7, 853-862, July 2019.
5. Sun, Q., J. Wu, C. Gan, Y. Hu, N. Jin, and J. Guo, "A new phase current reconstruction scheme for four-phase SRM drives using improved converter topology without voltage penalty," IEEE Transactions on Industrial Electronics, Vol. 65, No. 1, 133-144, January 2018.
6. Krishnan, R., S.-Y. Park, and K. Ha, "Theory and operation of a four-quadrant switched reluctance motor drive with a single controllable switch-the lowest cost four-quadrant brushless motor drive," IEEE Transactions on Industry Applications, Vol. 41, No. 4, 1047-1055, July–August 2005.
7. Gan, C., J. Wu, Q. Sun, W. Kong, H. Li, and Y. Hu, "A review on machine topologies and control techniques for low-noise switched reluctance motors in electric vehicle applications," IEEE Access, Vol. 6, 31430-31443, 2018.
8. Mishra, A. K. and B. Singh, "Self-governing single-stage photovoltaic water pumping system with voltage balancing control for a four-phase SRM drive," IET Electric Power Applications, Vol. 14, No. 1, 119-130, January 2020.
9. Borg Bartolo, J., M. Degano, J. Espina, and C. Gerada, "Design and initial testing of a high-speed 45-kW switched reluctance drive for aerospace application," IEEE Transactions on Industrial Electronics, Vol. 64, No. 2, 988-997, February 2017.
10. Ho, C., J. Wang, K. Hu, and C. Liaw, "Development and operation control of a switched-reluctance motor driven flywheel," IEEE Transactions on Power Electronics, Vol. 34, No. 1, 526-537, January 2019.
11. Liang, J., L. Jian, G. Xu, and Z. Shao, "Analysis of electromagnetic behavior in switched reluctance motor for the application of integrated air conditioner on-board charger system," Progress In Electromagnetics Research, Vol. 124, 347-364, 2012.
12. Isobe, K., K. Nakamura, and O. Ichinokura, "A consideration of high speed SR motor for electric power tools," Journal of the Magnetics Society of Japan, Vol. 38, No. 5, 194-198, 2014.
13. Mecrow, B. C., E. A. El-Kharashi, J. W. Finch, and A. G. Jack, "Segmental rotor switched reluctance motors with single-tooth windings," IEE Pro. — Electric Power Applications, Vol. 150, No. 5, 591-599, September 9, 2003.
14. Hayashi, H., K. Nakamura, A. Chiba, T. Fukao, K. Tungpimolrut, and D. Dorrell, "Efficiency improvements of switched reluctance motors with high-quality iron steel and enhanced conductor slot fill," IEEE Transactions on Energy Conversion, Vol. 24, No. 4, 819-825, December 2009.
15. Li, Y., S. Ravi, and D. C. Aliprantis, "Tooth shape optimization of switched reluctance motors for improved torque profiles," Power & Energy Society General Meeting, 1-7, July 26–30, 2015.
16. Jing, L. and J. Cheng, "Research on torque ripple optimization of switched reluctance motor based on finite element method," Progress In Electromagnetics Research M, Vol. 74, 115-123, 2018.
17. Li, Q., A. Xu, L. Zhou, and C. Shang, "A deadbeat current control method for switched reluctance motor," Progress In Electromagnetics Research Letters, Vol. 91, 123-128, 2020.
18. Wang, S., Z. Hu, and X. Cui, "Research on novel direct instantaneous torque control strategy for switched reluctance motor," IEEE Access, Vol. 8, 66910-66916, 2020.
19. Deng, X., B. Mecrow, H. Wu, and R. Martin, "Design and development of low torque ripple variable-speed drive system with six-phase switched reluctance motors," IEEE Transactions on Energy Conversion, Vol. 33, No. 1, 420-429, March 2018.
20. Cao, X., J. Zhou, C. Liu, and Z. Deng, "Advanced control method for a single-winding bearingless switched reluctance motor to reduce torque ripple and radial displacement," IEEE Transactions on Energy Conversion, Vol. 32, No. 4, 1533-1543, December 2017.
21. Bostanci, E., M. Moallem, A. Parsapour, and B. Fahimi, "Opportunities and challenges of switched reluctance motor drives for electric propulsion: A comparative study," IEEE Trans. Transport. Electrific., Vol. 3, No. 1, 58-75, March 2017.
22. Chen, C., H. Guo, and G. Zhang, "SOSM direct torque and direct suspension force controlfor double stator bearingless switched reluctance motor," Progress In Electromagnetics Research C, Vol. 96, 179-192, 2019.
23. Sun, Q., J. Wu, C. Gan, C. Shi, and J. Guo, "DSSRM design with multiple pole arcs optimization for high torque and low torque ripple applications," IEEE Access, Vol. 6, 27166-27175, 2018.
24. Madhavan, R. and B. G. Fernandes, "Performance improvement in the axial flux-segmented rotorswitched reluctance motor," IEEE Transactions on Energy Conversion, Vol. 29, No. 3, 641-651, September 2014.
25. Kermanipour, M. J. and B. Ganji, "Modification in geometric structure of double-sided axial flux switched reluctance motor for mitigating torque ripple," Canadian Journal of Electrical and Computer Engineering, Vol. 38, No. 4, 318-322, 2015.
26. Gupta, T. D., K. Chaudhary, R. M. Elavarasan, R. K. Saket, I. Khan, and E. Hossain, "Design modification in single-tooth winding double-stator switched reluctance motor for torque ripple mitigation," IEEE Access, Vol. 9, 19078-19096, 2021.
27. Asgar, M., E. Afjei, and H. Torkaman, "A new strategy for design and analysis of a double-stator switched reluctance motor: Electromagnetics, FEM, and experiment," IEEE Trans. Magn., Vol. 51, No. 12, 1-8, December 2015.
28. Asgar, M. and E. Afjei, "Radial force reduction in a new flat-type double-stator switched reluctance motor," IEEE Transactions on Energy Conversion, Vol. 31, No. 1, 141-149, March 2016.
29. Gecer, B. and N. F. O. Serteller, "Understanding switched reluctance motor analysis using ANSYS/Maxwell," 2020 IEEE 29th International Symposium on Industrial Electronics (ISIE), 446-449, Delft, Netherlands, 2020.
30. Miller, T. J. E., Switched Reluctance Motors and Their Control, CRC Press, London, U.K., 1993.
31. Mademlis, C. and I. Kioskeridis, "Performance optimisation in switched reluctance motor drives with online commutation angle control," IEEE Transactions on Energy Conversion, Vol. 18, No. 3, 448-457, September 2003.
32. Rekik, M., M. Besbes, C. Marchand, B. Multon, S. Loudot, and D. Lhotellier, "Improvement in the field-weakening performance of switched reluctance machine with continuous mode," IET Electric Power Applications, Vol. 1, No. 5, 785-792, September 2007.