US 12,328,049 B2
Slot wedge for a stator of a dynamo-electric machine
Tobias Katzenberger, Bad Königshofen STT Unteressfeld (DE); and Bastian Plochmann, Neustadt an der Aisch (DE)
Assigned to Hottinger Brüel & Kjaer GmbH, Darmstadt (DE)
Appl. No. 18/016,608
Filed by Innomotics GmbH, Nuremberg (DE)
PCT Filed Jul. 14, 2021, PCT No. PCT/EP2021/069635
§ 371(c)(1), (2) Date Jan. 17, 2023,
PCT Pub. No. WO2022/023043, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 20188126 (EP), filed on Jul. 28, 2020.
Prior Publication US 2023/0291266 A1, Sep. 14, 2023
Int. Cl. H02K 3/48 (2006.01); H02K 3/487 (2006.01); H02K 15/12 (2006.01)
CPC H02K 3/487 (2013.01) [H02K 15/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A slot wedge of a dynamoelectric machine which comprises a stator including axially extending slots and a winding system disposed in the slots, said slot wedge configured to cover a corresponding one of the slots in a direction of an air gap and comprising:
a first layer; and
a second layer arranged in spaced-apart relation to the first layer at least in one section to form a flow channel between the first and second layers, said second layer having a perforation with a different density of holes per unit area, with the density of the holes being greater in a central area of the second layer and/or a perforation having holes defined by a diameter which is greater primarily in a central area of the slot.