Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1988-08-01
1989-07-25
Salce, Patrick R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 64, 418 31, H02K 919, F04B 4900, G04C 2344
Patent
active
048517232
ABSTRACT:
A coolant pump system for a variable speed generator includes a variable displacement pump mounted within the generator and coupled to the generator rotor such that the pump is driven at a speed proportional to the rotational speed of the generator rotor. The displacement of the pump is controlled by moving a pump stator with respect to the pump rotor. A spring positioned between the generator housing and the pump stator provides a biasing force which tends to move the pump stator in a direction that increase displacement of the pump. Back pressure in the coolant system is used to provide a force which tends to move the pump stator in a direction that decreases the pump displacement as the back pressure increases. An additional force on the pump stator which tends to further reduce pump displacement is electromagnetically controlled in response to the electrical load placed on the generator and/or the speed of the generator rotor. This additional force increases as rotor speed increases or electrical load decreases, thereby decreasing displacement of the pump.
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Lenart R. P.
Rebsch D. L.
Salce Patrick R.
Westinghouse Electric Corp.
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