US 12,451,753 B2
Electric machine with directly cooled windings
Frank Hermle, Aying (DE); Michael Hofmann, Neubiberg (DE); and Jorge A. Carretero Benignos, Garching bei München (DE)
Assigned to Airbus (S.A.S.), Blagnac (FR)
Filed by Airbus (S.A.S.), Blagnac (FR)
Filed on Jun. 22, 2023, as Appl. No. 18/212,911.
Claims priority of application No. 22180859 (EP), filed on Jun. 23, 2022.
Prior Publication US 2023/0421015 A1, Dec. 28, 2023
Int. Cl. H02K 5/20 (2006.01); H02K 3/28 (2006.01)
CPC H02K 5/20 (2013.01) [H02K 3/28 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An electric machine, comprising:
a plurality of windings for creating electromagnetic fields; and
at least one fluid-tight internal housing;
wherein at least one group of the windings is in an interior space of one of the at least one internal housing;
wherein each of the at least one group of the windings comprises at least two electric connecting sections for connecting a respective group of the windings to an external electrical circuit, and wherein the at least two electric connecting sections reach from the interior space through a wall of a respective internal housing of the at least one internal housing to outside the respective internal housing;
wherein the at least one internal housing comprises a coolant inlet and a coolant outlet;
wherein neighboring windings of the at least one group of the windings define gaps between each other, wherein the gaps are in fluid communication with a respective coolant inlet and the coolant outlet to be flown through by a coolant;
wherein the at least one internal housing comprises internal walls that each respectively create at least one flow channel inside the respective internal housing;
wherein the respective group of windings at least partially extends through the internal walls;
wherein the internal walls are respectively configured for creating a meandering flow of the coolant; and
wherein several of the internal walls only partially extend between two opposite sides of the housing and define a meandering flow path between the coolant inlet and the coolant outlet, the several internal walls repeatedly redirecting the flow between two opposite directions.