US 12,170,470 B2
Stator of an electric machine and an electric machine
Ilya Petrov, Lappeenranta (FI); and Juha Pyrhönen, Lappeenranta (FI)
Assigned to LAPPEENRANNAN-LAHDEN TEKNILLINEN YLIOPISTO LUT, Lappeenranta (FI)
Appl. No. 16/982,938
Filed by LAPPEENRANNAN-LAHDEN TEKNILLINEN YLIOPISTO LUT, Lappeenranta (FI)
PCT Filed Feb. 28, 2019, PCT No. PCT/FI2019/050162
§ 371(c)(1), (2) Date Sep. 21, 2020,
PCT Pub. No. WO2019/180308, PCT Pub. Date Sep. 26, 2019.
Claims priority of application No. 20185259 (FI), filed on Mar. 20, 2018.
Prior Publication US 2021/0013757 A1, Jan. 14, 2021
Int. Cl. H02K 3/24 (2006.01); H02K 1/16 (2006.01); H02K 1/20 (2006.01); H02K 3/22 (2006.01); H02K 9/197 (2006.01); H02K 9/22 (2006.01)
CPC H02K 3/24 (2013.01) [H02K 1/165 (2013.01); H02K 1/20 (2013.01); H02K 3/22 (2013.01); H02K 9/197 (2013.01); H02K 9/227 (2021.01)] 17 Claims
OG exemplary drawing
 
1. A stator of an electric machine, the stator comprising:
a stator core structure;
a stator winding comprising a plurality of stator coils mechanically supported by the stator core structure, each of the stator coils comprising electrical conductors and a cooling tube surrounded by the electrical conductors and configured to conduct cooling fluid in a longitudinal direction of the electrical conductors; and
cooling elements having heat-conductive mechanical contacts with the stator core structure, the cooling elements comprising channels configured to conduct the cooling fluid and the cooling tubes of the stator coils being connected to each other via the cooling elements, one of the cooling elements comprising
a first pipe interface configured to receive the cooling fluid, and
a plurality of connector pipe interfaces connected to the cooling tubes of two of the stator coils,
another one of the cooling elements comprising
a second pipe interface configured to deliver the cooling fluid out from the stator, and
a plurality of other connector pipe interfaces connected to the cooling tubes of two of the stator coils.