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Impact of Selected Methods of Cogging Torque Reduction in Multipolar Permanent-Magnet Machines

Author

Listed:
  • Zbigniew Goryca

    (Faculty of Environmental, Geomatic and Energy Engineering at the Kielce University of Technology, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland)

  • Sebastian Różowicz

    (Department of Industrial Electrical Engineering and Automatic Control, Kielce University of Technology, 7 Tysiąclecia Państwa Polskiego Str., 25-314 Kielce, Poland)

  • Antoni Różowicz

    (Department of Industrial Electrical Engineering and Automatic Control, Kielce University of Technology, 7 Tysiąclecia Państwa Polskiego Str., 25-314 Kielce, Poland)

  • Artur Pakosz

    (Research and Development Department, the Central Military Bureau of Design and Technology, 03-244 Warszawa, Poland)

  • Marcin Leśko

    (Department of Power Electronics and Power Engineering, Rzeszow University of Technology, Wincentego Pola 2, 35-959 Rzeszow, Poland)

  • Henryk Wachta

    (Department of Power Electronics and Power Engineering, Rzeszow University of Technology, Wincentego Pola 2, 35-959 Rzeszow, Poland)

Abstract

This paper focuses on the matter of cogging torque reduction by combining various methods of cogging torque minimization. Due to the high costs of prototype construction, cogging torque is minimized during the design phase by using numerical methods, while computer simulations are used to find a magnetic circuit arrangement for which the cogging torque has the smallest possible value. Cogging torque occurs as a result of combined impact of the magnetic field of a permanent magnet located at rotor and stator with variable magnetic conductivity depending on an angle of rotation. It is a pulsating torque and occurs permanently during machine operation, impacting the operation of the entire device cooperating with the electric machine and causing vibrations, tension, and noise. It results in braking torque and subsequent power losses and leads to faster wear and tear of machine structural elements. High cogging torque values cause problems with rotational speed adjustment. In the case of electric generators used in wind power plants, it impedes the start-up of power plants at high wind speeds. Considering the above, the reduction of cogging torque in permanent-magnet machines is extremely important.

Suggested Citation

  • Zbigniew Goryca & Sebastian Różowicz & Antoni Różowicz & Artur Pakosz & Marcin Leśko & Henryk Wachta, 2020. "Impact of Selected Methods of Cogging Torque Reduction in Multipolar Permanent-Magnet Machines," Energies, MDPI, vol. 13(22), pages 1-14, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:22:p:6108-:d:448955
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    Citations

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    Cited by:

    1. Massimo Caruso & Antonino Oscar Di Tommaso & Rosario Miceli & Fabio Viola, 2022. "A Cogging Torque Minimization Procedure for Interior Permanent Magnet Synchronous Motors Based on a Progressive Modification of the Rotor Lamination Geometry," Energies, MDPI, vol. 15(14), pages 1-19, July.
    2. Dong-Woo Nam & Kang-Been Lee & Hyun-Jo Pyo & Min-Jae Jeong & Seo-Hee Yang & Won-Ho Kim & Hyung-Kwan Jang, 2021. "A Study on Core Skew Considering Manufacturability of Double-Layer Spoke-Type PMSM," Energies, MDPI, vol. 14(3), pages 1-14, January.
    3. Sebastian Różowicz & Zbigniew Goryca & Antoni Różowicz, 2022. "Permanent Magnet Generator for a Gearless Backyard Wind Turbine," Energies, MDPI, vol. 15(10), pages 1-12, May.
    4. T. A. Anuja & M. Arun Noyal Doss, 2021. "Reduction of Cogging Torque in Surface Mounted Permanent Magnet Brushless DC Motor by Adapting Rotor Magnetic Displacement," Energies, MDPI, vol. 14(10), pages 1-20, May.

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