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

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2258

Lastpage

2260

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908385

Filename

908385