A dynamic model of the disk drive spindle motor and its applications

Author

Fu, W.N. ; Liu, Z.J. ; Bi, C.

Author_Institution

Data Storage Inst., Nat. Univ. of Singapore, Singapore

Volume

38

Issue

2

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

973

Lastpage

976

Abstract

A dynamic model of the hard disk-drive spindle motor based on the circuit-field-motion coupled-time-stepping finite-element method is presented. The model provides a basis for determining back electromotive force, inductance, and cogging torque in dynamic operation conditions. The merits of the proposed method are that the estimation of the motor parameters can be obtained, accounting for the saturation effect and other operational conditions, and the computing time for parameters calculation can be reduced. The proposed model can also be used to determine the commutation time, cogging torque, output torque, and radial force, to study the effect of the skewed magnets/slots, and to simulate the starting process and other transient processes

Keywords

commutation; disc drives; finite element analysis; hard discs; machine theory; motor drives; parameter estimation; torque; back electromotive force; circuit-field-motion coupled-time-stepping finite-element method; cogging torque; commutation time; dynamic model; dynamic operation conditions; finite element; hard disk-drive spindle motor; inductance; motor parameters estimation; operational conditions; output torque; radial force; saturation effect; skewed magnets/slots; starting process; transient processes; Bismuth; Commutation; Coupling circuits; Disk drives; Finite element methods; Forging; Inductance; Magnets; Maxwell equations; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.996250

Filename

996250