Rotor and Electric Machine

Abstract

A rotor, in particular for a current-excited synchronous machine, is at least partly embedded in a potting compound. The rotor is equipped with at least one conductor element, which forms a winding and is connected to a current collecting element, wherein potting compound is provided at least between the current collecting element and the winding, and a connection section of the conductor element, the connection section extending between the winding and the current collecting element, is shielded from the potting compound by a decoupling element arranged at the connection section.

Claims

1-9. (canceled)

10. A rotor for a current-excited synchronous machine, at least partially embedded in potting compound, wherein at least one conductor element is arranged on the rotor and forms a winding and is connected to a current collecting element, wherein the potting compound is provided at least between the current collecting element and the winding, and wherein a connection portion of the conductor element, the connection portion extending between the winding and the current collecting element, is shielded from the potting compound by a decoupling element arranged at the connection portion.

11. The rotor according to claim 10, wherein the decoupling element is arranged directly at the connection portion.

12. The rotor according to claim 10, wherein the decoupling element is a sheath element that completely encases the connection portion.

13. The rotor according to claim 12, wherein the sheath element is a glass silk silicone tube.

14. The rotor according to claim 10, wherein the decoupling element comprises an elastic layer in which the connection portion is embedded.

15. The rotor according to claim 14, wherein the elastic layer is formed of silicone, wherein the elastic layer comprises a base layer and a top layer, and wherein the connection portion is embedded between the base layer and the top layer.

16. The rotor according to claim 10, further comprising: a contact element in the connection portion connecting the conductor element to the current collecting element.

17. The rotor according to claim 10, wherein the rotor has a plurality of connection portions, and wherein the plurality of connection portions are shielded by a plurality of decoupling elements.

18. An electric machine comprising the rotor according to claim 10.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0017] FIG. 1 shows two views of a rotor seen along a rotor axis.

DETAILED DESCRIPTION

[0018] FIG. 1 shows, in the upper left half of the image, a rotor 10, seen along a rotor axis R. The rectangular frame indicates a detail which is shown enlarged in the lower right half of the image. In particular, a winding 12 can be seen here, which is formed by a conductor element 14. This conductor element 14 is connected via a connection portion 16 to a contact point 22 of a current collecting element 20. In the region between the contact point 22 and the exit of the conductor element 14 from the winding 12, referred to here as the connection portion 16, the conductor element 14 is substantially “free”. In accordance with the invention, it is now precisely in this region that the arrangement of a decoupling element is provided. In accordance with one embodiment, for example, in the region of the connection portion 16 the conductor element 14 is encased by a suitable sheath element, such as a glass fiber tube, or is wrapped in a suitable manner. Alternatively, an elastic layer is provided or arranged in this region and is designed to protect the conductor element 14 in the region of the connection portion and, in particular, to envelope or encase it. Alternatively, the conductor element 14 is replaced in the region of the connection portion 16 by a contact element which is arranged, so to speak, between the exit of the conductor element 14 from the winding 12 and the contact point 22. It has been found that the use of the decoupling elements can effectively prevent wire breakage in this region.

LIST OF REFERENCE SIGNS

[0019] 10 rotor [0020] 12 winding [0021] 14 conductor element [0022] 16 connection portion [0023] 20 current collecting element [0024] 22 contact point [0025] R rotor axis