Digital servo control system for a hard disc drive using a voice coil motor in voltage mode
US6751043B2 · kind B2 · utility
7Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2001 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Sep 24, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/081
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention comprises an architecture for voltage mode control of a voice coil motor in a hard disk drive. In contrast to conventional current mode control, coil current is not sensed or measured, which simplifies the feedback design with less hardware required in the implementation. Common design methodologies for the square root velocity profile, linear velocity profile and regulator/estimator control system designs can be migrated from the current mode architecture to the voltage mode architecture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.