Controlled-drag voice coil magnetic actuator
US5118976A · kind A · utility
0Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Jul 9, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K41/0356
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A disk drive actuator includes automatic eddy-current braking capability, enhanced by simple modifications of coil-mount structure, such as a split damping ring and spaced-rib array to produce intentional eddy current drag at unacceptably high actuation speeds, e.g., above 75 ips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.