Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-02-16
1998-02-03
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
36180, 322 25, 322 59, 322 63, H02H 706, H02P 910, H02N 100, H02N 300
Patent
active
057148210
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.
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Dougherty Thomas M.
Marathon Electric Mfg. Corp.
Wallace, Jr. Michael
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