Electromagnetic design for hard disk drive spindle motors with fluid film lubricated bearings

This paper discusses the problems associated with the electromagnetic design of hard disk drive (HDD) spindle motor having fluid film bearings. It will highlight the effect of the unbalanced electromagnetic pull in the radial direction of FFB spindle which uses permanent magnet brushless DC motors w...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1996-09, Vol.32 (5), p.3893-3895
Main Authors: Liu, Z.J., Bi, C., Zhang, Q.D., Jabbar, M.A., Low, T.S.
Format: Article
Language:English
Subjects:
Brushless DC motors
DC motors
Finite element methods
Hard disks
Magnetic analysis
Magnetic fields
Magnetic films
Performance analysis
Permanent magnet motors
Stator cores
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Summary:This paper discusses the problems associated with the electromagnetic design of hard disk drive (HDD) spindle motor having fluid film bearings. It will highlight the effect of the unbalanced electromagnetic pull in the radial direction of FFB spindle which uses permanent magnet brushless DC motors with slotted stator core. An analytical approach is employed for predicting the magnetic field and motor performance. Results obtained from this approach are compared with finite element analysis.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.539208