Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-12-07
1999-11-30
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310 58, 310 60A, 310 61, 310 62, 310 63, H02K 900, H02K 904
Patent
active
059948043
ABSTRACT:
The hydraulic components of a cooling circuit for a dynamoelectric machine are eliminated in a totally air cooled dynamoelectric machine which includes a rotor (12) rotatable about an axis (14) and including a central stack (20) of ferrous laminations (22) defining a plurality of radially outwardly directed circumferentially spaced poles (132), spaced shaft ends (24,26) on the axis (14) and extending from opposite sides of the stack (20) and a first air passage (46) in the stack (20). Magnetic journal bearings (54,56) and a magnetic thrust bearing (58,60) are provided for the shaft segments (24,26) and impellers (62) are located on opposite sides of the stack (20). A stator (16) surrounds the rotor (12) and includes windings (76) connected by end turns (94) located exteriorally of the stator (16). Axial winding coolant passages (152,158) are provided adjacent the windings (76) in the stator and radial passages (70,72) are located in the rotor and the stator and in fluid communication with an outlet (74) from the housing. Rotor coolant passages (130) are located in the stack (20) and all of the passages receive air from the impellers (62).
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Greenlee William
Grennan Robert
Halsey David
Smith W. Glen
Ramirez Nestor
Sundstrand Corporation
Tamal Karl E.
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