Title :
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
fDate :
3/1/2001 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
