D.C. motor control
US4079301A · kind A · utility
28Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1976 |
| Grant date | Mar 14, 1978 |
| Priority date | — |
| Expiry date | Dec 17, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/2985
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit for a direct current motor having separately excited armature and field windings and operable in both the constant torque and constant horsepower modes includes a speed control circuit having a transfer characteristic providing an extremely high gain at lower frequencies and a low gain, for example unity, at higher frequencies and further includes means to reduce the low frequency gain when motor operation is switched from the constant torque to the constant horsepower mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.