Disk drive having actuator motion damper via histeresis energy loss of low energy magnet placed within magnetic field of a voice coil motor
US6549381B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Nov 29, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive includes a disk having a recording surface and a head stack assembly that includes an actuator body; an actuator arm cantilevered from the actuator body and including a head for reading and writing on the recording surface; a coil cantilevered from the actuator body in an opposite direction from the actuator arm, the coil defining a first leg and a second leg and a damping magnet disposed between the first and second legs. The damping magnet is configured to exert a damping force on the head stack assembly that is greater when the head is at a predetermined non-operational position than when the head is over the recording surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.