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Applicability of fractional slot axial flux permanent magnet synchronous machines in the field weakening region

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Abstract
In this paper, a complete sensitivity analysis of the optimal parameters for the axial flux permanentmagnet synchronous machines working in the field weakening region is implemented. Thanks to the presence of a parameterized accurate analytical model, it is possible to obtain all the required parameters of the machine. The two goals of the ideal design are to maximize the power density and the ratio ofmaximal to rated speed: nmax/nr, which is an inductance related parameter keeping the efficiency at the target speed above 90%. Different slots/poles/phases combinations are studied to reveal the optimum combination for each phase. This paper has studied the effect of the ratio of number of stator slots to number of rotor poles on the Pdensity and nmax/nr. It is shown that a low value of this parameter results in a better power density and nmax/nr . The effect of the outer diameter, and the inner to outer diameter ratio are studied with respect to the two design goals. In addition, a comparison between the finite and the theoretical infinite speed designs is implemented. A complete 3D finite element validation has proven the robustness of the analytical model.
Keywords
AFPMSM, analytical model, finite elements, field weakening, fractional slot winding, machine design, optimization, power density.

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MLA
Hemeida, Ahmed, et al. “Applicability of Fractional Slot Axial Flux Permanent Magnet Synchronous Machines in the Field Weakening Region.” IEEE TRANSACTIONS ON ENERGY CONVERSION, vol. 32, no. 1, Institute of Electrical and Electronics Engineers (IEEE), 2017, pp. 111–21.
APA
Hemeida, A., Taha, M., Abdallh, A. A., Vansompel, H., Dupré, L., & Sergeant, P. (2017). Applicability of fractional slot axial flux permanent magnet synchronous machines in the field weakening region. IEEE TRANSACTIONS ON ENERGY CONVERSION, 32(1), 111–121.
Chicago author-date
Hemeida, Ahmed, Mohamd Taha, Ahmed AE Abdallh, Hendrik Vansompel, Luc Dupré, and Peter Sergeant. 2017. “Applicability of Fractional Slot Axial Flux Permanent Magnet Synchronous Machines in the Field Weakening Region.” IEEE TRANSACTIONS ON ENERGY CONVERSION 32 (1): 111–21.
Chicago author-date (all authors)
Hemeida, Ahmed, Mohamd Taha, Ahmed AE Abdallh, Hendrik Vansompel, Luc Dupré, and Peter Sergeant. 2017. “Applicability of Fractional Slot Axial Flux Permanent Magnet Synchronous Machines in the Field Weakening Region.” IEEE TRANSACTIONS ON ENERGY CONVERSION 32 (1): 111–121.
Vancouver
1.
Hemeida A, Taha M, Abdallh AA, Vansompel H, Dupré L, Sergeant P. Applicability of fractional slot axial flux permanent magnet synchronous machines in the field weakening region. IEEE TRANSACTIONS ON ENERGY CONVERSION. 2017;32(1):111–21.
IEEE
[1]
A. Hemeida, M. Taha, A. A. Abdallh, H. Vansompel, L. Dupré, and P. Sergeant, “Applicability of fractional slot axial flux permanent magnet synchronous machines in the field weakening region,” IEEE TRANSACTIONS ON ENERGY CONVERSION, vol. 32, no. 1, pp. 111–121, 2017.
@article{8504277,
  abstract     = {In this paper, a complete sensitivity analysis of the optimal parameters for the axial flux permanentmagnet synchronous
machines working in the field weakening region is implemented. Thanks to the presence of a parameterized accurate analytical model, it is possible to obtain all the required parameters of the machine. The two goals of the ideal design are to maximize the power density and the ratio ofmaximal to rated speed: nmax/nr, which is an inductance related parameter keeping the efficiency at the target speed above 90%. Different slots/poles/phases combinations
are studied to reveal the optimum combination for each phase. This paper has studied the effect of the ratio of number of stator slots to number of rotor poles on the Pdensity and nmax/nr. It is shown that a low value of this parameter results in a better power density and nmax/nr . The effect of the outer diameter, and the inner to outer diameter ratio are studied with respect to the two design goals. In addition, a comparison between the finite and the
theoretical infinite speed designs is implemented. A complete 3D finite element validation has proven the robustness of the analytical model.},
  author       = {Hemeida, Ahmed and Taha, Mohamd and Abdallh, Ahmed AE and Vansompel, Hendrik and Dupré, Luc and Sergeant, Peter},
  issn         = {0885-8969},
  journal      = {IEEE TRANSACTIONS ON ENERGY CONVERSION},
  keywords     = {AFPMSM,analytical model,finite elements,field weakening,fractional slot winding,machine design,optimization,power density.},
  language     = {eng},
  number       = {1},
  pages        = {111--121},
  publisher    = {Institute of Electrical and Electronics Engineers (IEEE)},
  title        = {Applicability of fractional slot axial flux permanent magnet synchronous machines in the field weakening region},
  url          = {http://dx.doi.org/10.1109/tec.2016.2614011},
  volume       = {32},
  year         = {2017},
}

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