US 12,341,403 B2
Integrated stator device for an electric machine of a flywheel energy storage system
Hendrik Schaede, Darmstadt (DE); and Nicolai Meder, Darmstadt (DE)
Assigned to Adaptive Balancing Power GmbH, Pfungstadt (DE)
Appl. No. 18/003,538
Filed by Adaptive Balancing Power GmbH, Pfungstadt (DE)
PCT Filed Jun. 21, 2021, PCT No. PCT/EP2021/066821
§ 371(c)(1), (2) Date Dec. 29, 2022,
PCT Pub. No. WO2022/002667, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 10 2020 208 153.0 (DE), filed on Jun. 30, 2020.
Prior Publication US 2023/0253856 A1, Aug. 10, 2023
Int. Cl. H02K 1/20 (2006.01); H02K 7/02 (2006.01); H02K 11/01 (2016.01)
CPC H02K 7/025 (2013.01) [H02K 1/20 (2013.01); H02K 11/014 (2020.08)] 10 Claims
OG exemplary drawing
 
1. A stator device for an electric machine of a flywheel mass accumulator with a rotor unit operated in an evacuated ambient area, having:
a laminating unit, having a winding and at least two vacuum-side motor phase connection cables connected to the winding;
a cylindrical sleeve unit, on whose outer circumferential surface the laminating unit is arranged characterized by
a sealing unit which is arranged on an inner circumferential surface of the sleeve unit and which is designed to connect the respective vacuum-side motor phase connection cables in a vacuum-tight manner to a respective environment-side motor phase connection cable, where the sealing unit is at least partially formed integrally with the sleeve unit or a sub-unit of the sleeve unit; and:
at least a part of the inner circumferential surface of the cylindrical sleeve unit is adjacent to an atmospheric environment separating the evacuated ambient area from the atmosphere, such that at least in a section of a cylindrical inner space of the cylindrical sleeve unit, through which cylindrical inner space a central axis of the cylindrical sleeve unit runs, an atmospheric pressure exists during operation:
the sleeve unit comprising at least one fluid channel for passing a cooling fluid through the sleeve unit.