US 12,136,860 B2
Electric machine having multiple rigid winding pieces in the form of hollow conductors and hydraulic connection part and seal with opposing surfaces
Michael Naderer, Salzburg (AT); Nikolaus Schweinert, Kaufbeuren (DE); and Manuel Hartong, Kaufbeuren (DE)
Assigned to dynamic E flow GmbH, Valley (DE)
Appl. No. 17/295,696
Filed by DYNAMIC E FLOW GMBH, Valley (DE)
PCT Filed Nov. 18, 2019, PCT No. PCT/EP2019/081687
§ 371(c)(1), (2) Date May 20, 2021,
PCT Pub. No. WO2020/104393, PCT Pub. Date May 28, 2020.
Claims priority of application No. 10 2018 129 229.5 (DE), filed on Nov. 20, 2018.
Prior Publication US 2022/0021261 A1, Jan. 20, 2022
Int. Cl. H02K 3/24 (2006.01); H02K 3/22 (2006.01); H02K 9/193 (2006.01)
CPC H02K 3/24 (2013.01) [H02K 3/22 (2013.01); H02K 9/193 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An electric machine, comprising:
a rotor;
a stator;
multiple winding pieces in the form of hollow conductors which form part of a coolant circuit of the electric machine;
a hydraulic connection part to which a number of the winding pieces are hydraulically connected, the hydraulic connection part being annular in the form of a ring;
a seal which defines multiple passages, each passage includes an end portion configured to receive a respective winding piece of the multiple winding pieces,
wherein:
the hydraulic connection part and the seal have opposing surfaces which are pressed against each other in order to ensure sealing of the individual connections of the winding pieces to the hydraulic connection part, wherein the opposing surfaces face in an axial direction relative to the electric machine; and
the hydraulic connection part, in the opposing surface which is pressed against the seal, has at least one annular groove which is in fluid communication with a number of the winding pieces so that a coolant can be fed into the winding pieces or a coolant exiting the winding pieces can be collected in the at least one groove.