Experimental investigation of shock responses of cantilever-shaft design hydrodynamic bearing spindle motors

Open-loop radial operating shock responses of spindle motors are studied experimentally. Unlike a ball bearing spindle, a hydrodynamic bearing (HDB) is able to suppress the vibration within a few milliseconds. However, HDB spindles have higher response amplitudes than ball bearing spindles. HDB resp...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1998-07, Vol.34 (4), p.1913-1915
Main Authors: Ku, C.-P.R., Shumway, M.
Format: Article
Language:English
Subjects:
Accelerometers
Applied sciences
Ball bearings
Electric shock
Electronics
Exact sciences and technology
Frequency
Hard disks
Hydrodynamics
Magnetic devices
Other magnetic recording and storage devices (including tapes, disks, and drums)
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Servomotors
Shafts
Spinning
Testing
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Summary:Open-loop radial operating shock responses of spindle motors are studied experimentally. Unlike a ball bearing spindle, a hydrodynamic bearing (HDB) is able to suppress the vibration within a few milliseconds. However, HDB spindles have higher response amplitudes than ball bearing spindles. HDB response amplitude is linearly proportional to the shock impulse amplitude at the current test range. A longer shock duration has a higher response amplitude. Reducing compliance of the thrust bearing does not affect the shock response amplitudes but does reduce the power consumption.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.706741