Multiple coils for reduction of stray magnetic fields in disk file actuators
US4669013A · kind A · utility
20Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1985 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Apr 2, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K41/0356
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear disk actuator is disclosed incorporating a magnetic circuit for reducing stray magnetic fields in the region of the disks and recording heads of a magnetic recording disk system. The moving part of the actuator is provided with a plurality of coils mounted thereon, at least two of which are energized simultaneously and in magnetically opposing relationship to reduce the amplitude of the stray magnetic fields. Movement of the actuator is achieved by both energized coils interacting with a set of alternating poles positioned on the stationary part of the actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.