Electric machine cooling system

Details Electric machine cooling system Electric machine cooling system

1993-03-18

1995-09-12

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02K 900

Patent

active

054499615

ABSTRACT:
Electric machines are used to produce electrical energy or are driven by electrical energy. Such machines include a stator assembly and a rotor assembly rotationally positioned within the stator assembly. A gap is formed between the rotating element and the stationary element. To increase the life and efficiency of many electric machines, heat formed within the gap is carried away by passing a cooling media through the gap. The present electric machine includes a cooling system wherein the electric machine is positioned in an inlet plenum of a gas turbine engine. Compressed air from the gas turbine engine is used to cool the gap of the electric machine. An expansion turbine is attached to the rotor assembly upstream of the gap and has high pressure gap cooling air directed through the expansion turbine into the gap to cool the electric machine.

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