Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-08-21
2000-08-01
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310 62, 310 58, H02K 132
Patent
active
060971169
ABSTRACT:
In a turbo-generator (10) having a rotor (11) and a stator (12) concentrically surrounding the rotor (11) and separated from the rotor (11) by an air gap (14), and also having a cooling arrangement in which a main fan (33) draws in a gaseous cooling medium flowing through corresponding cooling passages in the rotor (11) and in the stator (12) and forces it through a cooler (22, 23, 24) back into the cooling passages, the cooling medium flowing through the rotor (11) in the axial direction, issuing in a heated state into the air gap (14) and being returned from the air gap (14) to the main fan (33), improved rotor cooling is achieved in that the cooling medium heated by the rotor (11) is directed radially outward from the air gap (14) through outflow passages (15) in the stator (12) and is returned to the main fan (33) outside the stator (12) via a cooling-air return (21).
REFERENCES:
patent: 1022021 (1912-04-01), Farquhar
patent: 2862121 (1958-11-01), Ringland
patent: 4264834 (1981-04-01), Armor et al.
patent: 4379975 (1983-04-01), Kitajima
Hess Stephan
Joho Reinhard
von Wolfersdorf Jens
Zimmermann, deceased Hans
ABB Research Ltd.
Jones Judson H.
Ramirez Nestor
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