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 recesses 12 extending in a U-shape from the outer circumference 14 of the rotor toward the rotor center 16 to a vertex 18 and back to the outer circumference 14 of the rotor. The recesses 12 are divided into an odd number of recess regions 22 by an inner bridge 20, and in each recess 12, one central recess region 22a and two outermost recess regions 22b are not filled with filler, and between the central recess region 22a and the outermost recess regions 22b there is at least one recess region 22c filled with magnetic filler. Furthermore, the present invention relates to an electromechanical device or a drivetrain for an automobile comprising the rotor 10 described above and at least partially electrically driven.

Claims

1. A rotor (10) for an electric machine (34) of an electric vehicle 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. The recess (12) extends in a U-shape from the outer circumference (14) of the rotor towards the rotor center (16) to the apex (18), and then back to the outer circumference (14) of the rotor. In the rotor (10), the aforementioned recess (12) is divided into odd-numbered recess regions (22) by an inner bridge (20), In one recess (12), neither the central recess region (22a) nor the two outermost recess regions (22b) are filled with filler material. A rotor (10) characterized in that at least one recessed region (22c) filled with a magnetic filler exists between the central recessed region (22a) and the outermost recessed region (22b).

2. The rotor (10) includes a plurality of circular segments, The rotor (10) according to claim 1, wherein each circular segment has at least two, preferably at least three, recesses (12) that are spaced radially apart from one another.

3. The recess (12) has mirror symmetry with respect to the mirror axis (24), The rotor (10) according to claim 1 or 2, wherein the mirror axis (24) extends radially through the rotor center (16).

4. The rotor (10) according to any one of claims 1 to 3, wherein the recess (12) has a hyperbolic extension.

5. The rotor (10) according to any one of claims 1 to 4, wherein the recess (12) tapers in width (26) from the apex (18) toward the outer circumference (14) of the rotor.

6. The rotor (10) according to any one of claims 1 to 5, wherein the radial distance (38) between two adjacent U-shaped recesses (12) at the vertex (18) decreases as the distance from the rotor center (16) increases.

7. The rotor (10) according to any one of claims 1 to 6, wherein at least the central recessed region (22a) and / or the recessed region (22c) filled with the magnetic filler taper toward the outer circumference (14) of the rotor along an axis perpendicular to the U-shaped extension axis.

8. The inner bridges (20) of the multiple recesses (12) that are spaced apart from each other each preferably extend along a common extension axis (30), The rotor (10) according to claim 3, wherein the common extension shaft (30) originates at the intersection (32) of the mirror axis (24) and the outer circumference (14) of the rotor, and extends from the mirror axis (24) toward the rotor center (16) at an angle of less than 90 degrees.

9. The rotor (10) according to any one of claims 1 to 8, wherein the recessed region (22c) filled with the magnetic filler is formed to extend along the magnetic field lines generated by the stator (36) during the operation of the electromachine (34).

10. Electrical machinery (34), A rotor (12) according to any one of claims 1 to 9, An electric machine (34) comprising a stator (36).

11. The stator (36) includes an annularly formed yoke having an inner surface facing radially inward, Multiple stator teeth (40) are arranged on the inner surface of the yoke, spaced apart from each other in the circumferential direction of the yoke. The electromachine (34) according to claim 10, wherein the circumferential spacing of the outermost recessed region (22b) corresponds to the distance between two spaced stator teeth (40).

12. A drivetrain for an electric vehicle that is at least partially electrically powered, The electrical machine (34) described in claim 10 or 11 is provided, or A drivetrain for an automobile, comprising a rotor (10) according to any one of claims 1 to 9.

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