Disk drive monitoring a supply current to protect motor driver circuits
US6934135B1 · kind B1 · utility
120Cited by
15References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2003 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Feb 14, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/553
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a spindle motor for rotating a disk and a voice coil motor (VCM) for actuating a head over the disk. The spindle motor comprises a plurality of windings, and the VCM comprises a voice coil. If the current flowing from a supply voltage exceeds a threshold, the windings are disconnected from the supply voltage, the voice coil is disconnected from the supply voltage, and the first and second ends of the voice coil are connected to ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.