Method and apparatus for limiting actuator coil temperature
US6754035B2 · kind B2 · utility
10Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2001 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Nov 21, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5521
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The temperature of an actuator voice coil in a disc drive is regulated so as to prevent outgassing. In a preferred embodiment, coil temperature is calculated at the beginning of each long seek. If the temperature is determined to be at or below a predetermined “safe” level, temperature rise is not limited and power may be applied to the coil without additional limitations. If, however, coil temperature is determined to be above the “safe” level, proportional control is used to scale back power generation so as to prevent the coil temperature from exceeding the coil's specified temperature limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.