Spindle motor driver circuit
US6433502B1 · kind B1 · utility
6Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 2001 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Jun 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/085
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The spindle motor drive circuit includes a power source voltage varying device for varying a voltage applied to a motor by controlling a power source voltage, and a pulse width varying device for varying a pulse width by pulse width modulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.