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Reduction of Cogging Torque in Surface Mounted Permanent Magnet Brushless DC Motor by Adapting Rotor Magnetic Displacement

Author

Listed:
  • T. A. Anuja

    (Department of Electrical and Electronics Engineering, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur 603203, India)

  • M. Arun Noyal Doss

    (Department of Electrical and Electronics Engineering, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur 603203, India)

Abstract

Cogging torque is a critical dilemma in Permanent Magnet Brushless DC (PMBLDC) motors. In medium-low power PMBLDC motors, redundant vibrations and forbidding noises arise as a result of the harmonic magnetic forces created by cogging torque. This paper introduces a simple approach for minimizing cogging torque in PMBLDC motors by applying placement irregularities in rotor magnets. An angle shift in the rotor magnets in surface-mounted PMBLDC motors helps to attain magnet displacement. This displacement imparts an asymmetrical magnet structure to the rotor. Maintaining pole arc to pole pitch ratio (L/τ) of between 0.6 and 0.8, shifting angles from 1° to 8° were considered in order to analyze the effect of the angle shift on the rotor magnets. An analytical expression was also derived for finding the shifting angle with the minimum cogging torque in the PMBLDC motor by using the Virtual Work Method (VWM). The optimization of the shifting angle with minimum cogging torque was investigated using 3D Finite Element Analysis (FEA). A comparison of the simulation and analytical results of cogging torque was carried out. It was determined that the reduction of cogging torque in the analytical results showed good agreement with the FEA analysis.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:10:p:2861-:d:555457
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    References listed on IDEAS

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    1. Pierpaolo Dini & Sergio Saponara, 2019. "Cogging Torque Reduction in Brushless Motors by a Nonlinear Control Technique," Energies, MDPI, vol. 12(11), pages 1-20, June.
    2. Chengcheng Liu & Jiawei Lu & Youhua Wang & Gang Lei & Jianguo Zhu & Youguang Guo, 2017. "Techniques for Reduction of the Cogging Torque in Claw Pole Machines with SMC Cores," Energies, MDPI, vol. 10(10), pages 1-17, October.
    3. Jung-Woo Kwon & Jin-hee Lee & Wenliang Zhao & Byung-Il Kwon, 2018. "Flux-Switching Permanent Magnet Machine with Phase-Group Concentrated-Coil Windings and Cogging Torque Reduction Technique," Energies, MDPI, vol. 11(10), pages 1-11, October.
    4. Pierpaolo Dini & Sergio Saponara, 2020. "Design of an Observer-Based Architecture and Non-Linear Control Algorithm for Cogging Torque Reduction in Synchronous Motors," Energies, MDPI, vol. 13(8), pages 1-20, April.
    5. Martin Sumega & Pavol Rafajdus & Marek Stulrajter, 2020. "Current Harmonics Controller for Reduction of Acoustic Noise, Vibrations and Torque Ripple Caused by Cogging Torque in PM Motors under FOC Operation," Energies, MDPI, vol. 13(10), pages 1-23, May.
    6. 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.
    7. Myeong-Hwan Hwang & Hae-Sol Lee & Hyun-Rok Cha, 2018. "Analysis of Torque Ripple and Cogging Torque Reduction in Electric Vehicle Traction Platform Applying Rotor Notched Design," Energies, MDPI, vol. 11(11), pages 1-14, November.
    8. Miguel García-Gracia & Ángel Jiménez Romero & Jorge Herrero Ciudad & Susana Martín Arroyo, 2018. "Cogging Torque Reduction Based on a New Pre-Slot Technique for a Small Wind Generator," Energies, MDPI, vol. 11(11), pages 1-15, November.
    9. 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.
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    Cited by:

    1. Fugang Zhai & Liu Yang & Wenqi Fu & Haisheng Tong & Tianyu Zhao, 2022. "The Effects of Permanent Magnet Segmentations on Electromagnetic Performance in Ironless Brushless DC Motors," Energies, MDPI, vol. 15(2), pages 1-18, January.
    2. Pierpaolo Dini & Sergio Saponara, 2022. "Review on Model Based Design of Advanced Control Algorithms for Cogging Torque Reduction in Power Drive Systems," Energies, MDPI, vol. 15(23), pages 1-29, November.
    3. Surat Khan & Abdin Pasund & Naseer Ahmad & Shoaib Ahmed & Hamid Ali Khan & Khalid Mehmood Cheema & Ahmad H. Milyani, 2022. "Performance Investigation and Cogging Torque Reduction in a Novel Modular Stator PM Flux Reversal Machine," Energies, MDPI, vol. 15(6), pages 1-20, March.
    4. Andrzej Bień & Tomasz Drabek & Dawid Kara & Tomasz Kołacz, 2022. "Reduction in the Cogging Torques in the DCEFSM Motor by Changing the Geometry of the Rotor Teeth," Energies, MDPI, vol. 15(7), pages 1-17, March.

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