Design and optimization of a dual-stage high bandwidth piggy-back electromagnetic milli-actuator

Author

Lin, H. ; Ong, E.H.

Author_Institution

Data Storage Inst., Singapore

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3673

Lastpage

3675

Abstract

A novel high bandwidth secondary-stage milli-sized electromagnetic actuator is proposed and reported. It is constructed at the tip of the carriage arm of a conventional actuator system. The electromagnetic characteristics and dynamic performance of the piggy-back milli-actuator were investigated and are reported. The study shows that the head positioning system supported by the proposed dual-stage milli-electromagnetic actuator has achieved high primary resonances, lateral rigid body mode at 18 kHz and torsional mode at 25 kHz, and can have a significantly wide servo bandwidth

Keywords

disc drives; electromagnetic actuators; frequency response; hard discs; magnetic heads; microactuators; position control; servomechanisms; actuator design; dual-stage; dynamics performance; frequency response; head positioning system; high bandwidth; high primary resonances; lateral rigid body mode; magnetic recording; milli-sized electromagnetic actuator; optimization; piggyback electromagnetic milli-actuator; secondary-stage; torsional mode; wide servo bandwidth; Actuators; Bandwidth; Coils; Couplers; Design optimization; Electromagnetic forces; Magnetic heads; Resonance; Servomechanisms; Suspensions;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800627

Filename

800627