Control system for a DC motor
US4268782A · kind A · utility
14Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1978 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Sep 7, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/93
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system for controlling DC motors of the type employing permanent magnets as field poles. The firing phase angle of a thyristor is controlled in response to an error signal representative of an error between a commanded motor speed and an actual motor speed. For preventing demagnetization of the permanent magnets due to the armature reaction, the clamp level of the error signal is changed in accordance with the actual motor speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.