Rotor for electromechanism of at least partially electrically driven automobile, electromechanism, and drivetrain for at least partially electrically driven automobile

Abstract

To provide a rotor for electromechanical applications that has improved magnetic properties, high mechanical stability, and / or a long service life. [Solution] The rotor 10 includes a plurality of recesses 12 spaced radially apart from each other to form a flux barrier, the plurality of recesses 12 being divided into a plurality of recess regions 22a, 22b by one or more inner bridges 20. The bridge thickness 24 of the inner bridges 20 located closer to the rotor center 16 is greater than the bridge thickness 24 of the inner bridges 20 located further away from the rotor center 16. The present invention further relates to an electromachine including the rotor 10. Furthermore, the present invention relates to an electromachine, or a drivetrain for an automobile comprising the rotor 10 and at least partially electrically driveable.

Claims

1. A rotor (10) for an electric machine of an automobile that is at least partially electrically driven, The rotor (10) includes a plurality of recesses (12) that are spaced radially apart from each other to form a flux barrier. In the rotor (10), the plurality of recesses (12) are divided into a plurality of recess regions (22) by one or more inner bridges (20), A rotor (10) characterized in that the bridge thickness (24) of an inner bridge (20) located closer to the rotor center (16) is greater than the bridge thickness (24) of an inner bridge (20) located further away from the rotor center (16).

2. The rotor (10) according to claim 1, wherein the bridge thickness (24) of all inner bridges (20) depends on the distance of each inner bridge (20) to the rotor center (16), and decreases as the distance to the rotor center (16) increases.

3. The rotor (10) according to claim 1 or 2, wherein the inner bridge (20) has a shape in which at least one side is recessed.

4. The rotor (10) according to any one of claims 1 to 3, wherein the inner bridge (20) has a shape with recesses on both sides.

5. The rotor (10) according to any one of claims 1 to 4, wherein a portion (22a) of the plurality of recessed regions is filled with a magnetic filler.

6. The rotor (10) according to claim 5, wherein the inner bridge (20) that separates the recessed region (22b) without a filler from the recessed region (22a) filled with the magnetic filler is formed to be more deeply recessed with respect to the recessed region (22b) without a filler than with respect to the recessed region (22a) filled with the magnetic filler.

7. The rotor (10) according to any one of claims 1 to 6, wherein the inner bridge (20) divides the plurality of recesses (12) into an odd number of recess regions (22).

8. The central recessed region (22b) does not have a filler material. The rotor (10) according to claim 7, wherein recessed regions (22a) filled with magnetic filler material are present on both sides of the central recessed region (22b).

9. The central recessed region (22b) has two opposing sides (32) that extend in the direction of the outer circumference of the rotor (10), The rotor (10) according to claim 7 or 8, wherein the side (32) located closer to the rotor center (16) has a curve in the direction of the outer circumference of the rotor (10).

10. The central recessed region (22b) has a trapezoidal basic shape (26), The two mutually parallel sides (28, 30) of the basic shape (26) extend essentially tangentially with respect to the outer circumference of the rotor (10), The rotor (10) according to any one of claims 7 to 9, wherein of the two parallel sides (28, 30) of the basic shape (26), the longer side is located closer to the rotor center (16).

11. The rotor (10) according to any one of claims 7 to 10, wherein the central recess region (22b) is the central recess region (22b) of the recess (12) located closest to the rotor center (16).

12. The rotor (10) according to any one of claims 7 to 11, wherein the outermost recessed region (22b) does not have a filler material and is adjacent to a recessed region (22a) filled with a magnetic filler material.

13. The outermost recessed region (22b) has a trapezoidal basic shape (26), The two mutually parallel sides (28, 30) of the basic shape (26) extend essentially tangentially with respect to the outer circumference of the rotor (10), The rotor (10) according to any one of claims 7 to 12, wherein of the two parallel sides (28, 30) of the basic shape (26), the longer side is located closer to the rotor center (16).

14. It is an electrical machine, A rotor (10) according to any one of claims 1 to 13, An electromachine comprising a stator.

15. A drivetrain for an automobile that is at least partially electrically powered, The electrical machine is provided as described in claim 14, or A drivetrain for an automobile, comprising a rotor (10) according to any one of claims 1 to 13.

Images