Control unit
US4605884A · kind A · utility
10Cited by
12References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1985 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Feb 1, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/902
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control unit for a movable member comprises a motor for driving the movable member, a speed detector for detecting a rotating speed of the motor, a reference signal generator, amplifiers of different gains for amplifying a signal representing a phase difference between a speed signal from the speed detector and a reference signal from the reference signal generator, a selector for selecting one of the outputs of the amplifiers in accordance with the velocity signal and the reference signal, and a driver for driving the motor by the selected amplifier output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.