Granted Patent B2

US 12,191,711 · App. 17/630,307 · Granted Jan 7, 2025

Inventors: Sebastian Waider (Petersberg, DE); Philipp Söntgerath (Niederkrüchten, DE); Nils Krais (Strahlungen, DE)

Assignee: Valeo Siemens eAutomotive Germany GmbH

H02K1/20H02K5/203H02K5/20H02K2213/03

Abstract

Claims (38)

1. A stator device for an electric machine, comprising:

a stator body;

a plurality of cooling channels:

configured to cool the stator body,

extend parallel to an axis of the stator body, and

wherein a cross-sectional area of each one of the cooling channels is asymmetric to the axis of the stator body; and

a cooling fluid connection device:

that axially outwardly and radially delimits a circumferentially extending connection channel,

wherein a cross-sectional area of the connection channel is continuous and symmetric to the axis of the stator body,

into which a respective axial end of the cooling channels opens, and

wherein the connection channel extends radially further inward than the cooling channels.

2. The stator device as claimed in claim 1 ,

wherein the cross-sectional area of the connection channel is perpendicular to a circumferential direction and

wherein the cross-sectional area of each one of the cooling channels is perpendicular to the circumferential direction.

3. The stator device as claimed in claim 2 , wherein the cross-sectional area of the connection channel is at least 0.3 times the cross-sectional area of each one of the cooling channels.

4. The stator device as claimed in claim 2 , wherein a ratio of a square of the cross-sectional area of the connection channel to an inner circumference of the connection channel is at least 0.1 times a sum of a ratio of the square of the cross-sectional area of each one of the cooling channels to an axial length of a cooling channel across all cooling channels.

5. The stator device as claimed in claim 1 , wherein a transition between each one of the plurality cooling channels and the connection channel is stepped or beveled in an axial direction.

6. The stator device as claimed in claim 1 , wherein the cross-sectional area of each one of the cooling channels is notch-shaped.

7. The stator device as claimed in claim 1 , wherein a number of the cooling channels is at least forty-eight.

8. The stator device as claimed in claim 1 , further comprising:

a stator housing which houses the stator body,

wherein the cooling channels are formed between the stator body and the stator housing.

9. The stator device as claimed in claim 8 , wherein the cooling channels are delimited:

by radial recesses extending parallel to the axis of the stator body and by a cylindrical lateral surface of the stator housing, or

by radial recesses extending parallel to the axis of the stator housing and by a cylindrical lateral surface of the stator body.

10. The stator device as claimed in claim 8 , wherein the cooling fluid connection device is integrally formed with the stator housing.

11. The stator device as claimed in claim 1 , wherein the cooling fluid connection device is integrally formed with an end shield of the stator device.

12. The stator device as claimed in claim 1 , wherein the cooling fluid connection device is configured as an attachment part attached to:

the stator body, or

a plurality of end laminations of a laminated stator core.

13. The stator device as claimed in claim 1 , wherein the cooling fluid connection device has an inlet which leads radially outward.

14. The stator device as claimed in claim 1 , further comprising a further cooling fluid connection device:

that axially outwardly and radially delimits a circumferentially extending further connection channel,

into which a respective other axial end of the cooling channels opens, and

wherein the connection channel extends radially further inward than the cooling channels.

15. An electric machine, comprising:

a stator device as claimed in claim 1 ; and

a rotor arranged within the stator device.

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (13)