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Diagnosis and Robust Design Optimization of SPMSM Considering Back EMF and Cogging Torque due to Static Eccentricity

Author

Listed:
  • Jin-Cheol Park

    (Department of Automotive Engineering, Hanyang University, Seoul 04763, Korea)

  • Soo-Hwan Park

    (Department of Automotive Engineering, Hanyang University, Seoul 04763, Korea)

  • Jae-Hyun Kim

    (Department of Automotive Engineering, Hanyang University, Seoul 04763, Korea)

  • Soo-Gyung Lee

    (Steel Solution R&D Center, Posco, Incheon 21985, Korea)

  • Geun-Ho Lee

    (Electric Motor Control Laboratory, Graduate School of Automotive Engineering, Kookmin University, Seoul 02707, Korea)

  • Myung-Seop Lim

    (Department of Automotive Engineering, Hanyang University, Seoul 04763, Korea)

Abstract

Static eccentricity (SE) is frequently generated by manufacturing processes. As the nonuniformity of the air-gap length is caused by the SE, the torque ripple and cogging torque increase in the motor. This study analyzes the distorted back electromotive force (EMF) and cogging torque due to SE. Further, a motor design considering SE is performed for stable back EMF and low cogging torque. First, the SE was diagnosed and analyzed using the back EMF and cogging torque measured from the test results of the base model. In addition, the rotor position was calculated using the unbalanced back EMF due to the SE. The calculated rotor position is used when analyzing phenomena due to SE and applied to robust design. Subsequently, robust design optimization was performed to improve the unbalanced back EMF and cogging torque due to SE. Using finite element analysis (FEA) considering SE, the shape of the stator was designed based on the base model. The estimated rotor position from the base model was applied to the optimum model to confirm its robustness from SE’s effects. Finally, the base and optimum models were compared through the test results.

Suggested Citation

  • Jin-Cheol Park & Soo-Hwan Park & Jae-Hyun Kim & Soo-Gyung Lee & Geun-Ho Lee & Myung-Seop Lim, 2021. "Diagnosis and Robust Design Optimization of SPMSM Considering Back EMF and Cogging Torque due to Static Eccentricity," Energies, MDPI, vol. 14(10), pages 1-19, May.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:10:p:2900-:d:556474
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    References listed on IDEAS

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    1. Alexandra C. Barmpatza & Joya C. Kappatou, 2020. "Study of a Combined Demagnetization and Eccentricity Fault in an AFPM Synchronous Generator," Energies, MDPI, vol. 13(21), pages 1-17, October.
    2. Yucai Wu & Guanhua Ma, 2019. "Anti-Interference and Location Performance for Turn-to-Turn Short Circuit Detection in Turbo-Generator Rotor Windings," Energies, MDPI, vol. 12(7), pages 1-18, April.
    3. Andrea Del Pizzo & Luigi Pio Di Noia & Emanuele Fedele, 2020. "A Simple Analytical Model of Static Eccentricity for PM Brushless Motors and Validation through FEM Analysis," Energies, MDPI, vol. 13(13), pages 1-19, July.
    4. Anmol Aggarwal & Elias G. Strangas, 2019. "Review of Detection Methods of Static Eccentricity for Interior Permanent Magnet Synchronous Machine," Energies, MDPI, vol. 12(21), pages 1-20, October.
    5. Chung-Seong Lee & Kyoung-Soo Cha & Jin-Cheol Park & Myung-Seop Lim, 2020. "Tolerance-Insensitive Design of the Magnet Shape for a Surface Permanent Magnet Synchronous Motor," Energies, MDPI, vol. 13(6), pages 1-16, March.
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    Cited by:

    1. Jie Yu & Youjun Zhang & Hongyuan Shen & Xiaoqin Zheng, 2022. "Adaptive Online Extraction Method of Slot Harmonics for Multiphase Induction Motor," Energies, MDPI, vol. 15(18), pages 1-14, September.

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