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Torque Ripple Optimization of a Novel Cylindrical Arc Permanent Magnet Synchronous Motor Used in a Large Telescope

Author

Listed:
  • Shuhua Fang

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

  • Songhan Xue

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

  • Zhenbao Pan

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

  • Hui Yang

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

  • Heyun Lin

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

Abstract

This paper proposes the use of a novel cylindrical arc permanent magnet synchronous motor (CAPMSM) in a large telescope, which requires high positioning accuracy and low torque ripple. A 2D finite element method was used to analyze the cogging torque of the CAPMSM. The CAPMSM can be an alternative for a rotating motor to realize direct drive. A new method is proposed to separate the cogging torque, T cog , into the torque, T slot , generated by the slotted effect and the end torque, T end , generated by the end effect. The average torque and the torque ripple are optimized considering stator center angle, the angle between two adjacent stators and the unequal thickness of a Halbach permanent magnet. The torque ripple decreased from 31.73% to 1.17%, which can satisfy the requirement of tracking accuracy for large telescopes.

Suggested Citation

  • Shuhua Fang & Songhan Xue & Zhenbao Pan & Hui Yang & Heyun Lin, 2019. "Torque Ripple Optimization of a Novel Cylindrical Arc Permanent Magnet Synchronous Motor Used in a Large Telescope," Energies, MDPI, vol. 12(3), pages 1-15, January.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:3:p:362-:d:200371
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