Data storage device regulating BEMF power voltage during power failure
US10242698B1 · kind B1 · utility
3Cited by
19References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2018 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Apr 19, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/2054
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data storage device is disclosed comprising a head actuated over a disk, and a spindle motor configured to rotate the disk, wherein the spindle motor comprises a plurality of windings. During a power failure the head is unloaded by generating a periodic signal, shorting the windings of the spindle motor based on the periodic signal in order to generate a power voltage, and adjusting the periodic signal based on an amplitude of the power voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.