Granted Patent B2

US 12,732,034 · App. 18/302,798 · Granted Sep 8, 2026

Inventor: Daniel Knoblauch (Leonberg, DE)

Assignee: DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT

H02K1/20H02K2201/09

Abstract

Claims (29)

1 . A stator of an electric machine, comprising:

a stator lamination package comprising a plurality of stator laminations,

wherein the stator laminations comprise radially inward recesses that define portions of axially extending stator grooves, and

wherein stator windings are arranged in the stator grooves, directly around which windings a coolant can flow within the stator grooves;

a coolant guide arranged between the stator laminations of the stator lamination package; and

a contained space bordering the axially extending stator grooves on each axial end of the stator lamination package, wherein each contained space is configured to exchange coolant with the axially extending stator grooves, and wherein each contained space is configured to be sealed from a rotor and sealed radially outwardly by a dividing sealing body,

wherein the coolant guide comprises first lamination blanks axially bordering the coolant guide on opposite sides thereof,

wherein the coolant guide comprises second lamination blanks arranged between the first lamination blanks,

wherein the first lamination blanks and the second lamination blanks as well as the stator laminations radially comprise inward recesses for defining the stator grooves and for receiving the stator windings,

wherein only the second lamination blanks additionally comprise radial coolant channels extending radially outward from the stator grooves and configured to guide the coolant radially inward towards the stator grooves or radially outward from the stator grooves,

wherein the radially inward recesses of the stator laminations and the lamination blanks of the coolant guide and thus the stator grooves are closed in a radially inward direction by the stator laminations and the lamination blanks,

wherein axially adjacent stator laminations and lamination blanks of the stator lamination package and the coolant guide are glued together in a laminar manner,

wherein the stator lamination package is configured to receive the coolant axially inward on both axial sides of the stator lamination package and radially inward via the radial coolant channels extending radially outward from the stator grooves,

wherein the stator lamination package is configured to discharge the coolant axially outward via the axially extending stator grooves on both axial sides of the stator lamination package, and

wherein each contained space borders a radially outward second contained space on each axial end of the stator lamination package, wherein each second contained space is configured to exchange coolant with radially outward recesses extending through the stator lamination package, and wherein each second contained space is sealed radially inwardly by the respective dividing sealing body that radially outwardly seals each respective contained space.

2 . The stator according to claim 1 , wherein at least the stator laminations of the stator lamination package and the first lamination blanks of the coolant guide comprise the radially outward recesses, at least portions of which border axial coolant channels for guiding the coolant.

3 . The stator according to claim 2 , wherein the second lamination blanks of the coolant guide also comprise the radially outward recesses, which together border the axial coolant channels, wherein the radial coolant channels of the second lamination blanks extend between the stator grooves and the axial coolant channels.

4 . The stator according to claim 2 , wherein the second lamination blanks of the coolant guide are designed to have the same length radially inward and to have a shorter length radially outward than the first lamination blanks of the coolant guide and the stator laminations, and

wherein the radial coolant channels of the second lamination blanks extend from a radially outward circumference of the second lamination blanks towards the stator grooves.

5 . The stator according to claim 1 , wherein the first lamination blanks of the coolant guide axially cover the radial coolant channels of the second lamination blanks of the coolant guide.

6 . The stator according to claim 1 , wherein at least the first lamination blanks of the coolant guide and the stator laminations comprise radially outward cavities, which are designed to provide radial deformability of the stator lamination package.

7 . The stator according to claim 1 , wherein the stator laminations, the first lamination blanks, and the second lamination blanks are made of an identical material.

8 . The stator according to claim 1 , comprising a sealing body, which adjoins the stator laminations, the first lamination blanks, and the second lamination blanks in the radially inward direction, and which projects in an axial direction opposite the stator lamination package.

9 . The stator according to claim 8 , wherein the sealing body is designed as a self-stable gap tube, which adjoins the stator laminations and the first and second lamination blanks in the radially inward direction without being connected to the stator lamination package.

10 . The stator according to claim 9 , wherein the coolant guide is arranged, in the axial direction, in a center of the stator lamination package.

11 . The stator according to claim 8 , wherein the sealing body further adjoins the contained space in the radially inward direction and is configured to be arranged between the contained space and the rotor.

12 . An electric machine comprising a stator according to claim 1 and a rotor.

13 . The stator according to claim 1 , wherein each of the stator laminations and the first lamination blanks comprise a respective monolithic construction radially surrounding the stator grooves to enclose the stator grooves.

14 . The stator according to claim 1 , wherein each second contained space is configured to exchange coolant axially inwardly with the radially outward recesses.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (15)