Patent ID: 11962189
Assignee: ZF FRIEDRICHSHAFEN AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A stator for an electric machine, wherein the stator is fixedly mounted relative to a rotational axis, by which axis an axial direction and a radial direction around the axial direction are defined, the stator comprises a stator yoke that extends in the axial direction and in the radial direction,
stator teeth, facing toward the rotational axis, are arranged in a shape of a ring on the stator yoke along the axial direction, the stator teeth are uniformly spaced apart from one another in a circumferential direction so that a stator groove is formed between radially adjacent stator teeth,
the stator is divided axially in a middle thereof into a first stator section and a second stator section,
a radially extending first outer wall is provided on the stator yoke at an end of the first stator section and, at an opposite end of the stator yoke, a radially extending second outer wall is provided on the stator yoke, and the first and the second outer walls serve as axial support for the stator yoke,
a cooling manifold disk is integrated axially in the middle of the stator, between the first stator section and the second stator section,
the stator teeth, in the first stator section, comprise first tooth-cooling ducts that extend axially from the first outer wall to the cooling manifold disk for fluid to flow through, and the stator teeth, in the second stator section, comprise second tooth-cooling ducts that extend axially from the second outer wall to the cooling manifold disk for fluid to flow through, and the first tooth-cooling ducts are separated apart from one another by equal distances in the circumferential direction and the second tooth-cooling ducts are separated apart from one another by equal distances in the circumferential direction, and a respective first tooth-cooling duct and a respective second tooth-cooling duct are arranged at least in alternation in the stator,
the stator yoke, in the first stator section, comprises first fluid ducts that extend axially from the first outer wall to the cooling manifold disk for fluid to flow in, and the second stator section, comprises second fluid ducts that extend axially from the second outer wall to the cooling manifold disk for fluid to flow in, and the first fluid ducts are separated apart from one another by equal distances in the circumferential direction and the second fluid ducts are separated apart from one another by equal distances in the circumferential direction, and a respective first fluid duct and a respective second fluid duct are arranged at least in alternation in the stator, and
the cooling manifold disk forms a fluid connection respectively between one of the fluid ducts and one of the tooth-cooling ducts.