Alternating current generator with direct connected exciter winding
US5714821A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1994 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Feb 16, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K19/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A three phase four pole alternating current generator includes an AC exciter including a series winding for each phase of the main generator windings and a shunt winding for each of the main phase windings. The series exciter windings includes two coils. In a high Y connection of the winding, the two coils are connected in series with each other and with the main phase winding. In the low voltage Y connection, series coils are separated and each is located in a paralleled leg of the same main phase winding. The shunt winding is connected directly across a corresponding main phase winding. An electronic voltage regulator includes phase voltage sensing which is coupled to a reference control circuit to produce a control signal if the voltage varies from a reference voltage. The current to the shunt winding of the exciter is controlled to maintain the desired output voltage. The system establishes and maintains a selected voltage in a balance condition with minimum circuit connection and improved overall performance and is applicable for all sizes of generators of a particular design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.