Title :
Vibration and noise in a HDD spindle motor originated from the axial asymmetry of magnetic design
Author :
Sung, S.J. ; Jang, Gun Hee ; Jang, J.W. ; Song, Ji Yong
Author_Institution :
PREM, Hanyang Univ., Seoul, South Korea
fDate :
Oct. 31 2012-Nov. 2 2012
Abstract :
This research investigates numerically and experimentally the characteristics of axial unbalanced magnetic force (UMF) due to axial asymmetry of magnetic design in the spindle motor of a hard disk drive, and its effect on the acoustic noise and vibration. It shows that the least common multiple (LCM) harmonic of pole and slot of the acoustic noise and vibration are originated from axial UMF. It also shows experimentally that the axially balanced magnetic design can minimize the LCM harmonics in acoustic noise and vibration.
Keywords :
acoustic noise; disc drives; electric motors; hard discs; magnetic forces; HDD spindle motor; acoustic noise; acoustic vibration; axial asymmetry; axial unbalanced magnetic force; hard disk drive; least common multiple harmonic; magnetic design; pole; slot; Acoustic noise; Brushless motors; Harmonic analysis; Magnetic levitation; Magnetoacoustic effects; Magnetohydrodynamics; Vibrations; Axial asymmetry; HDD spindle motor; axial UMF; noise; vibration;
Conference_Titel :
APMRC, 2012 Digest
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-4734-1
