Development of a single coil coupled force VCM actuator for high TPI magnetic recording

Author

Lin, Huai ; Li, Qinghua ; He, Zhimin ; Chen, Shixin

Author_Institution

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

Volume

37

Issue

2

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

850

Lastpage

854

Abstract

A novel high bandwidth actuator assembly (HBX4) is developed for the applications of high TPI recording in hard disk drives. The novel design in voice coil motor (VCM) construction, with flat moving-coil, is as simple as a conventional one. The VCM generates orthogonal force or pure torque. A 3D finite element analysis (FEA) is conducted in the electromagnetic design to optimize some critical electromagnetic parameters and the main dimensions. A 3D FEA is also carried out to predict the dynamic performance. The study shows that the lateral quasirigid body vibration mode (QR mode), which limits the servo bandwidth in a conventional actuator, has been substantially suppressed. Measurement of the characteristics of a prototype is carried out and the result is discussed

Keywords

disc drives; electric actuators; finite element analysis; hard discs; magnetic recording; servomechanisms; small electric machines; vibrations; 3D finite element analysis; HBX4; areal density; design optimization; electromagnetic parameters; flat moving coil; hard disk drive; lateral quasirigid body vibration mode; magnetic recording; servo bandwidth; single coil coupled force VCM actuator; voice coil motor; Actuators; Assembly; Bandwidth; Coils; Couplings; Disk recording; Electromagnetic forces; Finite element methods; Hard disks; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.917630

Filename

917630