Remember Me
Or use your Academic/Social account:


You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.


Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message


Verify Password:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:

OpenAIRE is about to release its new face with lots of new content and services.
During September, you may notice downtime in services, while some functionalities (e.g. user registration, login, validation, claiming) will be temporarily disabled.
We apologize for the inconvenience, please stay tuned!
For further information please contact helpdesk[at]openaire.eu

fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Michaelides, Alexandros M.
Languages: English
Types: Doctoral thesis
Subjects: TK
A new switched reluctance motor configuration is proposed, in which the windings\ud are arranged to encourage short magnetic flux paths within the motor. Short flux\ud path motor configurations have been modelled extensively using electromagnetic\ud finite element analysis. It is demonstrated that short flux paths significantly reduce\ud the MMF required to establish the B-field pattern in a motor; as a result copper\ud losses are reduced. In addition, hysteresis and eddy current losses are decreased\ud as the volume of iron in which iron losses are generated is reduced.\ud Short flux paths are formed when two adjacent phase windings, configured to give\ud neighbouring stator teeth opposite magnetic polarity, are simultaneously excited.\ud In order to accurately model short flux path machines, a thorough electromagnetic\ud analysis of doubly excited systems is adopted. The proposed modelling theory\ud forms the basis for design considerations that can optimise the performance of the\ud 4-phase and 5-phase switched reluctance motors.\ud The electromagnetic theory of doubly excited systems is used in conjunction with\ud a dynamic simulation program, written in Turbo Pascal, to design a 5-phase\ud switched reluctance motor that exploits the advantages of short flux paths. Test\ud results from the constructed prototype confirm that short flux paths significantly\ud improve the efficiency of the switched reluctance motor. The 5-phase prototype\ud achieves higher efficiency than all known prior art switched reluctance motors and\ud industrial induction machines constructed in the same frame size. At the\ud [1300rpm, 20Nrn] operating point the efficiency of the 5-phase drive was measured\ud to be 87%. The corresponding motor efficiency was in excess of 89.5%.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • 49. The Jay-Jay eddy current brake manual, Lloyd Instruments, 1989.
    • 50. A. M. Michaelides and C. Pollock, 'Modelling of a new winding arrangement to improve the efficiency of the switched reluctance motor', IEE Proc. Int. Conf. Elec. Machines, pp. 213-219, Oxford 1993.
    • 51. J. Corda and J. M. Stephenson, 'An analytical estimation of the minimum and maximum inductances of a doubly salient motor', Proc. Int. Conf. on Stepping Motors and Systems, pp. 50-59, Leeds, 1979.
    • 52. J. Simkin and C. W. Trowbridge, 'Three-dimensional nonlinear electromagnetic field computations using scalar potentials', IEE Proc. B, Vol. 127, No. 6, pp. 368- 374, Nov. 1980.
    • 53. S. Williamson and A. A. Shaikh, 'Three dimensional effects in X / i diagrams for switched reluctance motors', IEE Proc. Int. Conf. Electrical Machines, pp. 489- 493, Manchester, UK, Sep. 1992.
    • 54. C. S. Biddlecombe, 'Calculating heat and bending in electromagnetic devices', Digest No:1993 1 117, IEE Colloquium on Coupling Electromagnetics to other fields, May 1993.
    • 55. D. Roger, 'Coupling electromagnetic to thermal and stress fields', Presentation at IEE Colloquium on Coupling Electromagnetics to Other Fields, May 1993.
    • 56. J. Byrne and J. Lacy, 'Characteristics of saturable stepper and reluctance motors', Proc. IEE Conf Small Electrical Machines, pp. 93-96, London, 1976.
    • 57. T. J. E. Miller and McGilp, 'Nonlinear theory of the switched reluctance motor for rapid computer-aided design', IEE Proc. B, Vol. 137, No. 6, pp. 337-347, 1990.
    • 58. J. D. Murray, 'Mathematical biology', Springer-Verlag, New York, 1989.
    • 59. A. Fitzgerald, C. Kingsley and S. Umans, 'Electric machinery', 5 th edition, McGraw Hill, 1993.
    • 60. R. Arumugan, J. Lindsay and R. Krishnan, 'Sensitivity of pole arc / pitch ratio on switched reluctance motor performance', IEEE Conf Proc. Ind. AppL Soc. Annual Meeting, Pittsburgh, USA, Oct. 1988.
    • 61. J. Faiz and J. Finch, 'Aspects of design optimisation for switched reluctance motors', IEEE Trans. Energy Conversion, Vol. 8, No. 4, pp.704-713, Dec. 1993.
    • 62. D. Tormey, D. Torrey and P. Levin, 'Minimum airgap-permeance data for the doubly slotted pole structures, common in variable reluctance motors', Conf Proc. Ind. AppL Soc. Annual Meeting, Seattle, USA, Oct. 1990.
    • 64. T. Kenjo, 'Stepping Motors and their Microprocessor Controls', Oxford Science Publications, 1984.
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article

Cookies make it easier for us to provide you with our services. With the usage of our services you permit us to use cookies.
More information Ok