Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1990-06-15
1993-02-23
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 61, H02K 900, H02K 920
Patent
active
051893258
ABSTRACT:
At least one liquid coolant passage is disposed within at least a pair of pole bodies in an electrical machine rotor. The liquid coolant passage is thermally coupled to pole loss heat caused by eddy currents and/or windage in the radially outermost portion of the rotor pole bodies. A rotatable liquid transfer coupling is fluid connected with the liquid passage(s) for transferring liquid coolant to and from the coolant passage(s) during machine operation. Preferably, a liquid coolant passage is included in each of N circumferentially spaced magnetically permeable pole bodies on the rotor. It is also preferable to include additional liquid coolant passages thermally coupled primarily to rotor windings within each coil slot of a typical rotor and fluid connected (either in parallel or in series) with the pole body liquid coolant passages.
REFERENCES:
patent: 3240967 (1966-03-01), Krastchew
patent: 3521094 (1968-08-01), Renz et al.
patent: 3742266 (1973-06-01), Heller et al.
patent: 4182137 (1980-01-01), Erth
patent: 4303842 (1981-12-01), Nathenson
patent: 4315172 (1982-02-01), Intichar et al.
patent: 4365176 (1982-12-01), Nathenson et al.
patent: 4728840 (1988-03-01), Newhouse
patent: 4943746 (1990-07-01), Scherzinger et al.
General Electric Company
Stephan Steven L.
To E.
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