Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1983-07-28
1989-01-03
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 55, 310 58, 310 61, H02K 124
Patent
active
047959339
ABSTRACT:
A salient-pole rotary electric machine comprises a stator including a stator core formed with a plurality of ventilation ducts spaced apart by a predetermined distance in its axial direction and extending in its radial direction, and a stator winding would around the stator core, and a rotor including a rotor shaft, a rotor rim rotatable together with the rotor shaft, a plurality of salient field poles disposed on the outer periphery of the rotor rim in circumferentially spaced apart relation and extending in the axial direction of the rotor rim, and cooling gas passages defined between every adjacent salient field poles. In the rotary electric machine, a closure member is bured in each of the cooling gas passages between the salient field poles to extend from one of the axial ends to the center of the cooling gas passage, and the closure members are disposed between the adjacent salient field poles in a relation alternate with each other in the axial direction of the salient field poles. The alternate arrangement of the closure members reduces the mechanical losses of the salient-pole rotary electric machine and ensures uniform cooling of the stator throughout the axial length of the stator.
REFERENCES:
patent: 2899573 (1959-08-01), Wesolowski
patent: 2974239 (1961-03-01), Havelka
patent: 3160770 (1964-12-01), Asantcheeff
patent: 3514647 (1970-05-01), Lipstein
patent: 3932778 (1976-01-01), Watanabe
patent: 4246505 (1981-01-01), Yasaka
patent: 4306165 (1981-12-01), Kitabayashi
Hitachi , Ltd.
Skudy R.
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