Computation of unbalanced radial force in permanent magnet motors

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Nonuniformity in magnet strength in permanent magnet motors results in a vibration-inducing unbalanced force acting on the rotor. This force is the difference of two large numbers and as such is difficult to determine precisely with numerical models. In this paper, a permanent magnet motor with unbalanced magnets is analyzed by the finite element method. Three different techniques for computing the net force on the rotor, including a recently developed field-correction approach, are compared. Sensitivities of the techniques to computational limitations and finite element mesh characteristics are discussed.

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7 p.

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Salon, S.J.; Howe, M.; Slavik, C.J.; DeBortoli, M.J. & Nevins, R.J. October 1, 1998.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • Knolls Atomic Power Laboratory
    Publisher Info: Knolls Atomic Power Lab., Schenectady, NY (United States)
    Place of Publication: Schenectady, New York

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Description

Nonuniformity in magnet strength in permanent magnet motors results in a vibration-inducing unbalanced force acting on the rotor. This force is the difference of two large numbers and as such is difficult to determine precisely with numerical models. In this paper, a permanent magnet motor with unbalanced magnets is analyzed by the finite element method. Three different techniques for computing the net force on the rotor, including a recently developed field-correction approach, are compared. Sensitivities of the techniques to computational limitations and finite element mesh characteristics are discussed.

Physical Description

7 p.

Notes

OSTI as DE99001850

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  • Naval symposium on electric machines, Annapolis, MD (United States), 26 Oct 1998

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  • Other: DE99001850
  • Report No.: KAPL-P--000128
  • Report No.: K--98176;CONF-981086--
  • Grant Number: AC12-76SN00052
  • Office of Scientific & Technical Information Report Number: 319896
  • Archival Resource Key: ark:/67531/metadc679939

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 1, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • May 16, 2016, 6:12 p.m.

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Salon, S.J.; Howe, M.; Slavik, C.J.; DeBortoli, M.J. & Nevins, R.J. Computation of unbalanced radial force in permanent magnet motors, article, October 1, 1998; Schenectady, New York. (digital.library.unt.edu/ark:/67531/metadc679939/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.