Positioner of a disk drive that positions a data transducer with reduced vibration
US6922301B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2002 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Jun 20, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5569
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive includes a head stack assembly having a storage disk, a data transducer, an actuator pivot center and a positioner. The positioner includes a magnet assembly, a primary coil array that generates a first rotational displacement of the data transducer, and a secondary coil array that generates a second rotational displacement of the data transducer. The absolute value of the ratio of the first rotational displacement to the second rotational displacement is at least approximately 1.5:1. The primary coil array generates a first vibration displacement that causes the data transducer to move off track, and the secondary coil array generates a second vibration displacement that is out of phase from the first vibration displacement. The absolute value of the sum of the first and second vibration displacements is less than the absolute value of the first vibration displacement. The disk drive can also include a control system that directs a first current to the primary coil array and a second current to the secondary coil array that is out of phase from the first current. The secondary coil array can include a proximal coil and a distal coil, with the proximal coil being posit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.