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2D harmonic analysis of the cogging torque in synchronous permanent magnet machines

2D harmonic analysis of the cogging torque in synchronous permanent magnet machines Presents an approach to determine sources of cogging torque harmonics in permanent magnet electrical machines on the basis of variations of air‐gap magnetic flux density with time and space. The magnetic flux density is determined from the two‐dimensional (2D) finite element model and decomposed into the double Fourier series through the 2D fast Fourier transform (FFT). The real trigonometric form of the Fourier series is used for the purpose to identify those space and time harmonics of magnetic flux density whose involvement in the cogging torque is the greatest relative contribution. Carries out calculations for a symmetric permanent magnet brushless machine for several rotor eccentricities and imbalances. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Emerald Publishing

2D harmonic analysis of the cogging torque in synchronous permanent magnet machines

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Publisher
Emerald Publishing
Copyright
Copyright © 2004 Emerald Group Publishing Limited. All rights reserved.
ISSN
0332-1649
DOI
10.1108/03321640410540719
Publisher site
See Article on Publisher Site

Abstract

Presents an approach to determine sources of cogging torque harmonics in permanent magnet electrical machines on the basis of variations of air‐gap magnetic flux density with time and space. The magnetic flux density is determined from the two‐dimensional (2D) finite element model and decomposed into the double Fourier series through the 2D fast Fourier transform (FFT). The real trigonometric form of the Fourier series is used for the purpose to identify those space and time harmonics of magnetic flux density whose involvement in the cogging torque is the greatest relative contribution. Carries out calculations for a symmetric permanent magnet brushless machine for several rotor eccentricities and imbalances.

Journal

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering – Emerald Publishing

Published: Sep 1, 2004

Keywords: Magnetic devices; Torque; Flux density; Fourier transforms

References

  • Reducing torque ripple in PM synchronous motors by pole shifting
    Bianci, N.; Bologhnani, S.
  • An approach for determining the source of torque harmonics in brushless DC motors
    Salon, S.; Sivasubramaniam, K.; Tukenmez‐Ergene
  • Analytical prediction of the cogging torque in radial‐field permanent magnet brush‐less motors
    Zhu, Z.; Howe, D.