Motor rotation control apparatus
US4658191A · kind A · utility
9Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1986 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Mar 25, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control apparatus whereby each time a motor adapted to start and stop its rotation repeatedly a plurality of times is rotated, the phase reference of a rotating object is adjusted and the rotating object is locked to a normal speed in a short period of time from the start. The control apparatus includes circuitry for detecting that the difference between the phase of a detection clock signal and the phase of rotation of the motor is less than predetermined value and the control of the motor is switched between the speed control and the phase control in accordance with the phase difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.