D. C. Motor control system effecting changes in the connections of the armature and variations in current flow through the field
US3938013A · kind A · utility
9Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1974 |
| Grant date | Feb 10, 1976 |
| Priority date | — |
| Expiry date | Jun 7, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/298
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A d.c. motor control system includes a pair of armature windings mounted on a single rotor or on a pair of mechanically coupled rotors, and a field winding or windings. The system includes switch means operable to effect a change in the electrical connections of the armature windings to a pair of electrical supply terminals and means for effecting variations of the current flowing in the field winding or windings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.