Design of a high bandwidth moving-coil actuator with force couple actuation for HDDs]

Author

Mah, Y.A. ; Lin, H. ; Li, Q.H. ; Chen, S.X.

Author_Institution

Data Storage Inst., Singapore

Volume

35

Issue

2

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

874

Lastpage

878

Abstract

This paper reports a novel high bandwidth moving-coil actuator. A special design in actuator construction leads to generation of pure torque in the actuator. With this special design the lateral quasi-rigid body vibration mode can be substantially suppressed. 2D FEA was carried out for the electromagnetic design to optimize the electromagnetic parameters and dimensions of the actuator. A 3D FEM solver was used to predict the characteristics of mechanical dynamics of the actuator. The electromagnetic characteristics, mechanical dynamics and performance of the actuator were measured. The results from simulation and experiment match quite well. The results show that the quasi-rigid body vibration mode is substantially suppressed and the primary resonance frequency is about 10 kHz in the novel actuator

Keywords

disc drives; electric actuators; finite element analysis; hard discs; servomechanisms; 10 kHz; 2D FEA; actuator construction; electromagnetic characteristics; electromagnetic design; electromagnetic parameters; force couple actuation; hard disk drives; high bandwidth moving-coil actuator; lateral quasi-rigid body vibration mode; mechanical dynamics; primary resonance frequency; Actuators; Bandwidth; Design optimization; Electromagnetic forces; Electromagnetic measurements; Mechanical variables measurement; Resonance; Resonant frequency; Torque; Vibrations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.753801

Filename

753801