H - Electricity – 02 – K
Patent
H - Electricity
02
K
H02K 9/04 (2006.01) H02K 9/00 (2006.01) H02K 9/18 (2006.01)
Patent
CA 2169520
The vertical-axis hydroelectric machine has a rotor star, which is provided with a hub (3) and on the outer periphery of which a rotor rim (7) is arranged. The latter carries rotor poles (14), laminated from pole plates, and pole windings (15). The stator plate body (18) is likewise laminated from plates and is provided with slots at the inner periphery for accommodating a stator winding (28), which has stator winding ends (41, 42) and winding connections at both end faces of the plate body. Both rotor rim (7) and stator plate body (18) are provided with radially running cooling slits (9, 19) through which cooling air can be passed from the hub through said slits (9) in the rotor rim, the distances (16) between the poles, the air gap (17) and the slits (19) in the stator plate body (18) into an annular space surrounding the latter and equipped with coolers (23) and from there back to the hub (3). In the process, the rotor acts as delivery and pressure-generating means for the cooling air. To partition off the machine air gap (17) from the winding-end space (39, 40), sealing plates (24) are fastened to the rotor poles (14) at both end faces, which sealing plates (24) extend into the machine air gap (17) up close to the stator bore and are arranged close together as viewed in the peripheral direction, if need be while leaving small gaps (34). In this way, they form an annular seal. The winding end (41, 42) and the winding connections thus lie in the fresh air flow behind the coolers (23) and are cooled in an optimum manner.
Asea Brown Boveri Ag
Swabey Ogilvy Renault
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