Disk drive adjusting gain of spindle motor compensator based on a ratio of spin speeds
US8737008B1 · kind B1 · utility
96Cited by
17References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 2011 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Mar 23, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a head actuated over a disk, a spindle motor for rotating the disk, and a spindle motor control system comprising a servo compensator operable to generate a control signal applied to the spindle motor, the servo compensator comprising a programmable gain term (PGT). The disk is spun at a first speed RPM—1 using a first value PGT—1 selected for the PGT, and the disk is spun at a second speed RPM—2 using a second value PGT—2 selected for the PGT, wherein the second value PGT—2 is generated in response to the first value PGT—1 scaled by a function of a ratio of RPM—2 to RPM—1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.