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A Study on Reduction of Cogging Torque and Magnet Usage through Intersect Magnet Consequent Pole Structure

Author

Listed:
  • Si-Woo Song

    (Department of Electrical Engineering, Hanyang University, Seoul 133-791, Republic of Korea)

  • Min-Ki Hong

    (Department of Electrical Engineering, Gachon University, Seongnam 461-701, Republic of Korea)

  • Ju Lee

    (Department of Electrical Engineering, Hanyang University, Seoul 133-791, Republic of Korea)

  • Won-Ho Kim

    (Department of Electrical Engineering, Gachon University, Seongnam 461-701, Republic of Korea)

Abstract

Owing to the shortage of rare-earth magnetic materials, various methods are being examined to reduce the use of magnets. One of these is a consequent pole. The consequent pole model can reduce the use of magnets by 50% using only one pole of the magnet and replacing the other pole with iron. However, the consequent pole has the disadvantage of generating back EMF asymmetry and a high cogging torque. In this study, an intersect magnet consequent pole structure is proposed to overcome the disadvantages of the existing consequent pole. Two methods have been proposed to improve axial leakage magnetic flux caused by the intersect magnet consequent pole structure. Finally, we propose a method to reduce the cogging torque and minimize the use of magnets with the same performance standard. For motor design, two-dimensional and three-dimensional finite element analysis was used, and comparative analysis was performed via simulations for several models. The existing model and the final model were compared and verified.

Suggested Citation

  • Si-Woo Song & Min-Ki Hong & Ju Lee & Won-Ho Kim, 2022. "A Study on Reduction of Cogging Torque and Magnet Usage through Intersect Magnet Consequent Pole Structure," Energies, MDPI, vol. 15(23), pages 1-10, December.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:23:p:9255-:d:995439
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    References listed on IDEAS

    as
    1. Jiabo Shou & Jien Ma & Zhiping Zhang & Lin Qiu & Bowen Xu & Chao Luo & Binqi Li & Youtong Fang, 2022. "Vibration and Noise Optimization of Variable-Frequency-Driven SPMSM Used in Compressor Based on Electromagnetic Analysis and Modal Characteristics," Energies, MDPI, vol. 15(20), pages 1-18, October.
    2. Jung-Woo Kwon & Byung-Il Kwon, 2022. "Torque Enhancement Principle of Stator PM Vernier Machine by Consequent Pole Structure," Energies, MDPI, vol. 15(9), pages 1-11, April.
    3. Samith Sirimanna & Thanatheepan Balachandran & Kiruba Haran, 2022. "A Review on Magnet Loss Analysis, Validation, Design Considerations, and Reduction Strategies in Permanent Magnet Synchronous Motors," Energies, MDPI, vol. 15(17), pages 1-16, August.
    4. Akihisa Hattori & Toshihiko Noguchi & Kazuhiro Murakami, 2022. "Mathematical Model Derivation and Experimental Verification of Novel Consequent-Pole Adjustable Speed PM Motor," Energies, MDPI, vol. 15(17), pages 1-25, August.
    Full references (including those not matched with items on IDEAS)

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