Analog/digital drive speed control circuit
US4375609A · kind A · utility
11Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1981 |
| Grant date | Mar 1, 1983 |
| Priority date | — |
| Expiry date | Mar 11, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/909
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A speed control circuit has a comparator which compares a voltage signal which is indicative of the actual speed of a shaft with a digital reference which is indicative of the desired speed of the shaft. If the actual speed is different than the desired shaft speed, a bi-directional control mechanism is operated in one direction or the other to adjust the actual speed of the shaft. The operation of the bi-directional control mechanism is periodically interrupted to increment the amount the actual shaft speed is changed to prevent overshoot of the desired speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.