Magnetic disk storage apparatus and method for controlling magnetic disk storage apparatus
US6937429B2 · kind B2 · utility
8Cited by
4References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 13, 2002 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | Feb 10, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic disk storage apparatus, when power supply is stopped, a magnetic head can be retracted safely and quickly so as not to be damaged. There are provided a back electromotive a force detector that detects back electromotive forces developed in coils of a voice coil motor for moving a magnetic head when power a supply is stopped, and a brake controller that judges a movement speed of the magnetic head from the detected back electromotive forces, and brakes the voice coil motor when the movement speed is greater than a preset first limited speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.