Apparatus for reducing spindle motor magnetic drag
US6876114B2 · kind B2 · utility
5Cited by
17References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2001 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Jun 28, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic flux shield extending substantially the entire width of a magnetic disk drive spindle motor magnet is mounted between the magnet and the disk drive's base frame and rotates with the magnet. The flux shield is formed of a magnetic material to capture any stray magnetic flux from the motor magnet that may produce power draining eddy currents in the base frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.