Undriven vibrations in brushless DC motors

@article{Hartman2000UndrivenVI,
  title={Undriven vibrations in brushless DC motors},
  author={Amber Hartman and Wendy L. Lorimer},
  journal={2000 Asia-Pacific Magnetic Recording Conference. Digests of APMRC2000 on Mechanical and Manufacturing Aspects of HDD (Cat. No.00EX395)},
  year={2000},
  pages={MA2/1-MA2/2}
}
This paper investigates motor vibrations due to reluctance forces. Forcing frequencies caused by motor design, part geometries, and errors in assembly are tabulated for several popular pole/slot ratios. Motor torque and translational force fluctuations are found to exhibit a rich set of shapes and frequencies, especially when multiple defects occur simultaneously. Two analysis methods are employed: the FEA approach and the Convolution Method. Both techniques predict similar frequency spectra… CONTINUE READING
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