Investigating the Magnetic Characteristics of 12/8 Switched Reluctance Motor for Enhanced Starting Torque

Authors

  • E. C. Abunike MICHAEL OKPARA UNIVERSITY OF AGRICULTURE, UMUDIKE, ABIA STATE
  • G. D. Umoh Department of Electrical and Electronic Engineering, Maritime Academy of Nigeria, Oron, Nigeria.
  • I. E. Nkan Department of Electrical and Electronic Engineering, Akwa Ibom State University, Mkpat Enin, Nigeria
  • O. I. Okoro Department of Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia State, Nigeria.

Keywords:

Switched reluctance motor, Static characteristics, Transient analysis, Magnetic flux, Torque

Abstract

The switched reluctance motor (SRM) is among the special purpose electric machine family. It is simple in construction and avoids use of magnet so it is cheap to manufacture. The magnetic characteristics and simulation of three phase 12/8 switched reluctance motor (SRM) for enhanced starting torque is presented. The motor was analyzed using finite element technique (FET) and it was improved by focusing on the impact of important geometrical parameters on torque and efficiency. From the simulated results, the motor attained maximum efficiency of 91.7% at a speed of 1648.6 rpm and recorded a maximum torque of 321.1 Nm at a speed of 34.4 rpm. The magnetic flux lines and densities were also recorded. The maximum and minimum magnetic flux lines of the motor as observed were 1.2x10-3 Wb/m and -8.5x10-4 Wb/m respectively while the respective values of the maximum and minimum magnetic flux density of the motor were 3.8x10-1 T and 2.11x10-9 T. The results show that most of the field energy is confined within the motor and also concentrated in the air gap region of the motor. Dynamic analysis of the motor was performed for 0.02 s at a damping coefficient of 0.71 µNms/rad. The results showed that the motor has lower torque ripple. The preference to use this type of motor where high speed operation and better starting torque are needed has been highlighted in this study.

References

Ahmad, T. (2017). Design and Analysis of a Switched Reluctance Machine for Traction in a Hybrid Automotive Application. Erasmus Mundus Master Course in Sustainable Transportation and Electrical Power Systems, Universidad De Oviedo.
ANSYS Electromagnetics 2018, ANSYS Inc.
Hams, M.R., Finch, J.W., Mallick, J.A. and Miller, T.J.E. (2004). A Review of the Integral Horsepower Switched Reluctance Drive. IEEE Trans. Ind. Appl. Soc., IA(22): 33-49.
Jisha, K., Abhijith, P., Mathew, J., Ramesh, B., Swathy, M.V., and Varun, J.A. (2015). Simulation and Magnetic Analysis of Switched Reluctance Motor with Various Rotor Pole Shapes Using Finite Element Method. International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, 4(4): 2398- 2403.
Kakilli, A. (2011). Magnetic Analysis of Modified-Rotor Switched Reluctance Motor. Electronics and Electrical Engineering, 9(115): 21-26.
Krishnan, R. (2001). Switched reluctance motor drives- modeling, simulation, analysis, design, and applications. CRC Press, Boca Raton, London.
Longya, Xu and Eric, Ruckstadter (1995). Direct Modeling of Switched Reluctance Machine by Coupled Field - Circuit Method. IEEE Transactions on Energy Conversion, 10(3): 446-454.
Mecrow, B.C., Finch, J.W., EI- Kharashi, E.A. and Jack, A.G. (2002). The Design of switched reluctance motors with segmental rotors. IEE Proc. of Electr. Power Applications, 149(4): 245-254, 2002.
Miller, T.J.E (1993). Switched reluctance motors and their control. Magna Physics Publications / Oxford University Press.
Miller T. J. E. (2001). Electronic Control of switched reluctance machines. Newnes, 225 Wildwood Avenue, Woburn.
Oyama, J., Higuchi, T., Abe, T. and Kifuji, N. (2004). Switched reluctance motor with Segmented core embedded in Aluminum rotor. Proc of Japan Industry Applications society Conference, 3(1): 493-496.
Oyama, J., Higuchi, T., Abe, T. and Kifuji, N. (2005). Fundamental Characteristics of a novel switched reluctance motor with segmented core embedded in Aluminum rotor. Papers of technical meeting on rotating machinery, IEE Japan, 5(64):43-48.
Piotr B., Mariusz K., and Jan P. (2006). Four-Quadrant Operation of Switched Reluctance Machine. Proceedings of Electrotechnical Institute, 6(229):21-34.
Ray, W.F., Lawrenson, P.J., Davis, R.M. and Stephenson, J.M. (1996). High Performance Switched Reluctance Brushless Drives. IEEE Trans. Ind. Appl., 11(4): 45-52.
Simone, S. (2016). Simulation and analysis of Switched Reluctance Generator for renewable energy applications. Thesis, Dublin Institute Of Technology, Dublin.
Son-in, S., Kulworawanichpong, T. and Paolaor, P. (2019). Magnetic field comparison of 6/4 and 8/6 switched reluctance motor by using the 3-D finite element method. International Journal of Smart Grid and Clean Energy, 1(1): 33-43.
Vijay, G. and Somlal, J. (2012). Design, Modeling and Simulation of 6/4 Switched Reluctance Motor. International Journal of Advanced Scientific Research and Technology, 2(2): 425-432.
Xu, L. and Jiping, Yao (1992). A Compensated Vector Control Scheme of a Synchronous Reluctance Motor Including Saturation and Iron Losses. IEEE Transactions on Industry Applications, 28(6): 1330-1338.

Additional Files

Published

2021-06-18

Issue

Vol. 18 No. 1 (2021)

Section

Articles

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