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Optimal Rotor Design of Synchronous Reluctance Machines Considering the Effect of Current Angle

Author

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  • Hegazy Rezk

    (College of Engineering at Wadi Addawaser, Prince Sattam Bin Abdulaziz University, Wadi Aldawaser 11991, Saudi Arabia
    Electrical Engineering Department, Faculty of Engineering, Minia University, Minia 61111, Egypt)

  • Kotb B. Tawfiq

    (Department of Electromechanical, Systems and Metal Engineering, Ghent University, 9000 Ghent, Belgium
    FlandersMake@UGent—corelab EEDT-MP, 3001 Leuven, Belgium
    Department of Electrical Engineering, Faculty of Engineering, Menoufia University, Menoufia 32511, Egypt)

  • Peter Sergeant

    (Department of Electromechanical, Systems and Metal Engineering, Ghent University, 9000 Ghent, Belgium
    FlandersMake@UGent—corelab EEDT-MP, 3001 Leuven, Belgium)

  • Mohamed N. Ibrahim

    (Department of Electromechanical, Systems and Metal Engineering, Ghent University, 9000 Ghent, Belgium
    FlandersMake@UGent—corelab EEDT-MP, 3001 Leuven, Belgium
    Electrical Engineering Department, Kafrelshiekh University, Kafrelshiekh 33511, Egypt)

Abstract

The torque density and efficiency of synchronous reluctance machines (SynRMs) are greatly affected by the geometry of the rotor. Hence, an optimal design of the SynRM rotor geometry is highly recommended to achieve optimal performance (i.e., torque density, efficiency, and power factor). This paper studies the impact of considering the current angle as a variable during the optimization process on the resulting optimal geometry of the SynRM rotor. Various cases are analyzed and compared for different ranges of current angles during the optimization process. The analysis is carried out using finite element magnetic simulation. The obtained optimal geometry is prototyped for validation purposes. It is observed that when considering the effect of the current angle during the optimization process, the output power of the optimal geometry is about 3.32% higher than that of a fixed current angle case. In addition, during the optimization process, the case which considers the current angle as a variable has reached the optimal rotor geometry faster than that of a fixed current angle case. Moreover, it is observed that for a fixed current angle case, the torque ripple is affected by the selected value of the current angle. The torque ripple is greatly decreased by about 34.20% with a current angle of 45° compared to a current angle of 56.50°, which was introduced in previous literature.

Suggested Citation

  • Hegazy Rezk & Kotb B. Tawfiq & Peter Sergeant & Mohamed N. Ibrahim, 2021. "Optimal Rotor Design of Synchronous Reluctance Machines Considering the Effect of Current Angle," Mathematics, MDPI, vol. 9(4), pages 1-18, February.
    • Handle: RePEc:gam:jmathe:v:9:y:2021:i:4:p:344-:d:496270
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    References listed on IDEAS

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    1. Mohamed Nabil Fathy Ibrahim & Peter Sergeant & Essam Rashad, 2016. "Simple Design Approach for Low Torque Ripple and High Output Torque Synchronous Reluctance Motors," Energies, MDPI, vol. 9(11), pages 1-14, November.
    2. Mohamed, Mohamed A. & Zaki Diab, Ahmed A. & Rezk, Hegazy, 2019. "Partial shading mitigation of PV systems via different meta-heuristic techniques," Renewable Energy, Elsevier, vol. 130(C), pages 1159-1175.
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