Data storage device comprising spindle motor current sensing with supply voltage noise attenuation
US9245577B1 · kind B1 · utility
4Cited by
329References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 2015 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Mar 26, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/12
- WIPO fieldElectrical machinery, apparatus, energy
- 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. The spindle motor is powered with a power voltage generated in response to a supply voltage. A clamping circuit is enabled when sensing a current flowing from the power voltage through at least one of the windings, wherein the clamping circuit is configured to clamp the power voltage to less than a peak voltage of the supply voltage in order to attenuate noise in the power voltage. The clamping circuit is disabled when not sensing the current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.