Title :
New design of a HDD spindle motor using damping material to reduce NRRO
Author :
Jang, G.H. ; Hong, S.J. ; Kim, D.K. ; Han, J.H.
Author_Institution :
Dept. of Precision Mech. Eng., Hanyang Univ., Seoul, South Korea
fDate :
9/1/2000 12:00:00 AM
Abstract :
This paper investigates the dynamics and NRRO of a 2.5" HDD by using FEM, modal testing and runout analysis. Most frequency components of NRRO are generated by the defects of ball and rotating race, and they are transmitted to disk through the spindle system. Based on the characterization of NRRO, it proposes the novel design of a spindle motor that can reduce NRRO effectively by inserting a viscoelastic damping material in a transmission path of NRRO, i.e., where the strain energy is highly concentrated
Keywords :
damping; disc drives; finite element analysis; hard discs; machine bearings; modal analysis; motor drives; servomechanisms; 2.5 in; Campbell diagram; FEM; HDD spindle motor design; ball bearing defects; frequency components; high track density; highly concentrated strain energy; modal testing; nonrepeatable runout reduction; rotating race defects; runout analysis; transmission path; viscoelastic damping material; Ball bearings; Capacitive sensors; Computer industry; Damping; Finite element methods; Frequency domain analysis; Hard disks; Shape; Solid modeling; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
