Title :
Reduction of acoustic noise in FDB spindle motors by using drive technology
Author :
Bi, C. ; Jiang, Q. ; Lin, S. ; Low, T.S. ; Mamun, A.A.
Author_Institution :
Data Storage Inst., Singapore, Singapore
fDate :
3/1/2003 12:00:00 AM
Abstract :
In the operation of fluid-dynamic-bearing (FDB) motors, the acoustic noise caused by the electromagnetic forces takes a big ratio in the noise level. The authors analyze the relationship between the acoustic noise frequency, harmonic current, and harmonic field, and propose a drive mode for reducing the acoustic noise of the FDB motors. The drive mode can also reduce the copper loss in the motor operation.
Keywords :
disc drives; electromagnetic forces; hard discs; harmonics; machine bearings; magnetic leakage; micromotors; noise abatement; FDB spindle motors; acoustic noise frequency; acoustic noise reduction; copper loss; drive mode; drive technology; electromagnetic forces; fluid-dynamic-bearing motors; harmonic current; harmonic field; Acoustic noise; Bismuth; Electromagnetic forces; Frequency; Harmonic analysis; Magnetic noise; Permanent magnet motors; Rotors; Stators; Torque;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.808927
