Storage apparatus, spindle motor control method, and program
US7443628B2 · kind B2 · utility
6Cited by
1References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 16, 2006 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Nov 22, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A default gain table stores values of loop gain of a spindle motor control unit predetermined for each number of media. A loop gain setting unit detects the number of media, reads out a loop gain corresponding to the detected number of media from the default gain table and sets it in the spindle motor control unit. A loop gain measuring unit measures the loop gain of the spindle motor control unit during a test in the manufacturing process, adjusts it into an optimum loop gain, and stores it as a default lop gain in the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.