Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1991-02-05
1992-02-04
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 58, 310 60R, 310 91, 310194, H02K 124
Patent
active
050862464
ABSTRACT:
A dynamoelectric machine has a stator with a stator core and a plurality of spaced apart radially extending ventilation ducts. A rotor mounted for rotation within the stator has a shaft with a plurality of salient poles. Each salient pole has a winding on it and each pole with its winding constitutes a pole member. Adjacent pole members define between them an interpolar space. Cooling air enters each interpolar space from each end when the machine is operating, moves generally axially as portions of the air change direction to move radially outwards through the air gap separating the rotor and stator and then through the ventilation ducts. The air flow, in a radial outward direction, tends to be less at the ends of the rotor and through the ventilation ducts adjacent the ends of the stator. The invention places a baffle at each end of each interpolar space. The baffle is in a generally radial plane and has an outward edge adjacent the outer limit of the interpolar space as defined by the tips of the poles, and an inward edge spaced from the bottom of the interpolar space. The baffle improves the air flow radially outwards adjacent the ends of the rotor and the stator.
REFERENCES:
patent: 894015 (1908-07-01), Kishi
patent: 896323 (1908-08-01), Reist
patent: 928037 (1909-07-01), Frost
patent: 1030041 (1912-06-01), Williamson
patent: 2899573 (1959-08-01), Wesolowski
patent: 3590301 (1971-06-01), Woydt
patent: 3739212 (1973-06-01), Koelbel et al.
patent: 3846651 (1974-11-01), Mishra
patent: 4383191 (1983-05-01), Mazuyama
patent: 4467229 (1984-08-01), Ogita
patent: 5036238 (1991-07-01), Tajima
Dymond James H.
Saidi Nick N.
Young John M.
General Electric Canada Inc.
Skudy R.
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