Axial cooling of a rotor
First Claim
1. An air flow control for reducing ventilation losses in a rotating electric machine formed with a stator having a central opening and a rotor mounted for rotation within the central opening and having end portions, said rotor and stator having an air gap therebetween, the stator includes stator windings, and the rotor includes field windings, and salient poles in the air gap facing the stator and pole shoes disposed in spaced relation and having adjacent lateral margins forming pole gaps between the pole shoes and a cover member disposed between the pole shoes extending between the adjacent lateral margins for covering each of the pole gaps between the pole shoes forming an axial channel having openings at the ends for carrying a flow of cooling air therethrough and sealing means in the air gap for limiting the flow of air in the air gap.
1 Assignment
0 Petitions
Accused Products
Abstract
A rotating electric machine (1) having a stator (2) provided with windings and a rotor (4) provided with field windings and with salient poles (10) forming pole gaps (9) between the pole shoes (12) of the poles (10), which rotor (4) is arranged to be cooled by air flowing axially through the pole gaps (9) of the rotor (4), wherein each pole gap (9) between the pole shoes (12) is covered by at least one covering member (14) and that the air gap (15) is equipped with a sealing ring (16) to limit axial air flow.
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Citations
8 Claims
- 1. An air flow control for reducing ventilation losses in a rotating electric machine formed with a stator having a central opening and a rotor mounted for rotation within the central opening and having end portions, said rotor and stator having an air gap therebetween, the stator includes stator windings, and the rotor includes field windings, and salient poles in the air gap facing the stator and pole shoes disposed in spaced relation and having adjacent lateral margins forming pole gaps between the pole shoes and a cover member disposed between the pole shoes extending between the adjacent lateral margins for covering each of the pole gaps between the pole shoes forming an axial channel having openings at the ends for carrying a flow of cooling air therethrough and sealing means in the air gap for limiting the flow of air in the air gap.
Specification