Design of Optimal Winding Layouts for Multiphase Fractional-Slot Concentrated-Wound Permanent Magnet Machines

  • Mohammad Farshadnia
Part of the Springer Theses book series (Springer Theses)


This chapter proposes a heuristic algorithm for the design of optimal winding layouts for multiphase FSCW stators to achieve maximum torque density. The proposed heuristics algorithm is based on the analysis performed in Chapter 2 of this thesis for determining the harmonic winding factors for FSCW stators. A new indicator referred to as the “winding performance index” is proposed that evaluates the torque production ability of different winding layouts for FSCW stators. Multiple case-studies are investigated to evaluate the application of the proposed heuristic algorithm. The obtained results are validated through FEA and tests on a prototype FSCW machine.


  1. 1.
    A.M. El-Refaie, Fractional-slot concentrated-windings synchronous permanent magnet machines: opportunities and challenges. IEEE Trans. Ind. Electron. 57, 107–121 (2010)CrossRefGoogle Scholar
  2. 2.
    A. Mohammadpour, L. Parsa, Asymmetrical multi-lane multi-phase motor drives, in Proceedings of the APEC (2014), pp. 2482–2487Google Scholar
  3. 3.
    E. Levi, R. Bojoi, F. Profumo, H.A. Toliyat, S. Williamson, Multiphase induction motor drives—a technology status review. Electr. Power Appl. IET 1, 489–516 (2007)CrossRefGoogle Scholar
  4. 4.
    F. Barrero, M.J. Duran, Recent advances in the design, modeling, and control of multiphase machines—Part I. IEEE Trans. Ind. Electron. 63, 449–458 (2016)CrossRefGoogle Scholar
  5. 5.
    M.J. Duran, F. Barrero, Recent advances in the design, modeling, and control of multiphase machines—Part II. IEEE Trans. Ind. Electron. 63, 459–468 (2016)CrossRefGoogle Scholar
  6. 6.
    E. Levi, Multiphase electric machines for variable-speed applications. IEEE Trans. Ind. Electron. 55, 1893–1909 (2008)CrossRefGoogle Scholar
  7. 7.
    W. Jin, Q. Ronghai, Z. Libing, Dual-rotor multiphase permanent magnet machine with harmonic injection to enhance torque density. IEEE Trans. Appl. Supercond. 22, 5202204–5202204 (2012)Google Scholar
  8. 8.
    N. Bianchi, M. Dai Pre, Use of the star of slots in designing fractional-slot single-layer synchronous motors, in IEE Proceedings on Electric Power Applications, vol. 153 (2006), pp. 459–466Google Scholar
  9. 9.
    S. Skaar, O. Krovel, R. Nilssen, Distribution, coil-span and winding factors for PM machines with concentrated windings. ICEM 2006, 2–5 (2006)Google Scholar
  10. 10.
    J. Cros, P. Viarouge, Synthesis of high performance PM motors with concentrated windings. IEEE Trans. Energy Convers. 17, 248–253 (2002)CrossRefGoogle Scholar
  11. 11.
    A.M. El-Refaie, M.R. Shah, Q. Ronghai, J.M. Kern, Effect of number of phases on losses in conducting sleeves of surface PM machine rotors equipped with fractional-slot concentrated windings. IEEE Trans. Ind. Appl. 44, 1522–1532 (2008)CrossRefGoogle Scholar
  12. 12.
    J. Figueroa, J. Cros, P. Viarouge, Generalized transformations for polyphase phase-Modulation motors. IEEE Trans. Energy Convers. 21, 332–341 (2006)CrossRefGoogle Scholar
  13. 13.
    L. Parsa, H.A. Toliyat, Five-phase permanent-magnet motor drives. IEEE Trans. Ind. Appl. 41, 30–37 (2005)CrossRefGoogle Scholar
  14. 14.
    K. Huilin, Z. Libing, W. Jin, Harmonic winding factors and MMF analysis for five-phase fractional-slot concentrated winding PMSM, in 2013 International Conference on Electrical Machines and Systems (ICEMS) (2013), pp. 1236–1241Google Scholar
  15. 15.
    N. Bianchi, E. Fornasiero, Index of rotor losses in three-phase fractional-slot permanent magnet machines. Electr. Power Appl. IET 3, 381–388 (2009)CrossRefGoogle Scholar
  16. 16.
    R. Dutta, L. Chong, M.F. Rahman, Design and experimental verification of an 18-Slot/14-pole fractional-slot concentrated winding interior permanent magnet machine. IEEE Trans. Energy Convers. 28, 181–190 (2013)CrossRefGoogle Scholar

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© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.School of Electrical Engineering and TelecommunicationsThe University of New South WalesSydneyAustralia

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