Stepper motor valve actuator control apparatus
US4084120A · kind A · utility
12Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1976 |
| Grant date | Apr 11, 1978 |
| Priority date | — |
| Expiry date | Jun 16, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87217
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An actuator control system includes a ballscrew type actuator for controlling the positioning of a valve device. A control circuit is responsive to pulsed drive signals for driving a synchronous stepper motor which is operatively coupled to the actuator. The control circuit includes a switching device which applies a DC voltage to the motor windings to hold the valve position when it is not being driven.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.