Dual coil rotary actuator

Details Dual coil rotary actuator Dual coil rotary actuator

1998-10-05

2000-08-15

Klimowicz, William

Dynamic magnetic information storage or retrieval

Head mounting

For shifting head between tracks

360265, 3602658, G11B 555, G11B 2108

Patent

active

061045810

ABSTRACT:
An actuator assembly having two coils disposed between the poles of a voice coil motor (VCM) magnet for improved dynamic performance during settling and tracking operations in a disk drive. The two coils in the VCM are connected to separate current sources to allow the current flow in the two coils to have the same sense (clockwise or counterclockwise) or the opposite sense with respect to each other. When the current flows in the two coils have the opposite sense, excitation of the principal in-plane bending mode resonance of the actuator assembly is suppressed allowing the use of an increased servo bandwidth for settling and tracking operations of the disk drive. During seek operations of the disk drive, where maximum torque on the actuator is desirable, the coil currents in the two coils are chosen to have the same sense so that the forces on the actuator from the two coils are additive.

REFERENCES:
patent: 4314295 (1982-02-01), Frandsen
patent: 4587714 (1986-05-01), Morris
patent: 4612592 (1986-09-01), Frandsen
patent: 4868432 (1989-09-01), Frandsen
patent: 4916342 (1990-04-01), Hirano et al.
patent: 4967296 (1990-10-01), Wiens et al.
patent: 5267110 (1993-11-01), Ottesen et al.
patent: 5621591 (1997-04-01), Rahimi et al.

Affiliated with

Also associated with

Rating

Dual coil rotary actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual coil rotary actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual coil rotary actuator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2014006