Motor control circuit with current limiter and bypass switch
US4780773A · kind A · utility
4Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1987 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Apr 10, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A spindle motor driving apparatus for a disc device in which in addition to a controller for operating a spindle motor at a predetermined speed, a switch for shorting a current limiting resistor provided between a motor power supply circuit and a driving circuit is closed in response to a predetermined condition after the motor is started.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.