Induction generator excitation system
US4006399A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1975 |
| Grant date | Feb 1, 1977 |
| Priority date | — |
| Expiry date | Sep 15, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K17/42
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A background discussion of induction machine equivalent circuits, including operation as an induction generator, is provided. Selective shorting of the machine terminals is described, to convert at least some of the mechanical input energy into electrical field energy for the machine. Systems are described for accomplishing the selective shorting with a single-phase machine, including sensing of the zero-crossing of the output voltage to insure that the shorting is effected at the appropriate time to replenish the field. The shorting time duration can be varied as a function of load. A three-phase shorting circuit is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.