Title :
Effect of drive modes on the acoustic noise of fluid dynamic bearing spindle motors
Author :
Lin, S. ; Jiang, Q. ; Mamun, A.A. ; Bi, C.
Author_Institution :
Electr. & Comput. Eng. Dept., Nat. Univ. of Singapore, Singapore
Abstract :
The torque ripple is one of the major sources of acoustic noise in the fluid dynamic bearing (FDB) spindle motors. This paper analyzes the relationship between the acoustic noise frequency, harmonic current and harmonic field, and compares the acoustic noise produced in FDB motors driven by different modes. Results show the effect of drive mode on acoustic noise is significant in the FDB spindle motors.
Keywords :
acoustic noise; disc drives; hard discs; machine bearings; torque; acoustic noise; acoustic noise frequency; drive mode; drive modes; fluid dynamic bearing spindle motors; harmonic current; harmonic field; torque ripple; Acoustic noise; Aerodynamics; Bismuth; Fluid dynamics; Frequency; Magnetic forces; Magnetic levitation; Permanent magnet motors; Rotors; Torque;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.816153
