ELECTRICAL MACHINE

• US 20120205996A1
• Filed: 10/22/2010
• Published: 08/16/2012
• Est. Priority Date: 10/28/2009
• Status: Active Grant

• Current Assignee: Innomotics GmbH
• Original Assignee: Siemens AG
• Inventors: Büttner, Klaus, Danov, Vladimir, Rehme, Olaf, Schäfer, Martin
• Granted Patent: US 9,252,642 B2
• Time in Patent Office: Days
• US Class Current: 310/54
• CPC Class Codes: H02K 15/00 Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
• CPC Class Codes: H02K 9/225 Heat pipes

Abstract

The invention relates to an electric machine (100) comprising a stator (107) and a rotor (101), wherein the rotor (101) comprises a hollow shaft (102), wherein a closed hollow space (103) is formed by means of the hollow shaft (102), wherein the closed hollow space (103) is provided for receiving a cooling agent, wherein a three-dimensional transport structure (200) is provided in the closed hollow chamber (103) for transporting the cooling agent. The three-dimensional structure can, for example, be produced by means of applying an adaptive material.

Claims

1-14. -14. (canceled)

15. An electrical machine, comprising:

a stator;

a rotor having a hollow shaft configured to have a closed hollow space to accept a coolant; and

a three-dimensional transport structure provided in the closed hollow space to transport the coolant.

16. The electrical machine of claim 15, wherein the three-dimensional transport structure has a first three-dimensional transport structure, and further comprising a filler provided in the hollow space of the hollow shaft and including the first three-dimensional transport structure to transport coolant in a first aggregate state.

17. The electrical machine of claim 16, wherein the three-dimensional transport structure has a second three-dimensional transport structure, said filler including the second three-dimensional transport structure to transport coolant in a second aggregate state.

18. The electrical machine of claim 16, wherein the first aggregate state is a condensate of the coolant.

19. The electrical machine of claim 15, wherein the three-dimensional transport structure is constructed to effect a transport of coolant through rotation of the three-dimensional transport structure.

20. The electrical machine of claim 15, wherein the three-dimensional transport structure has vanes, with a first plurality of vanes assuming a first vane position to transport coolant in a first aggregate state, and a second plurality of vanes assuming a second vane position to transport coolant in a second aggregate state.

21. The electrical machine of claim 15, wherein the three-dimensional transport structure has a first helical structure having a first coiling direction to transport coolant in a first aggregate state, and a second helical structure having a second coiling direction to transport coolant in a second aggregate state.

22. The electrical machine of claim 21, wherein each of the first and second helical structures is a member selected from the group consisting of a screw-type structure and a worm-type structure.

23. The electrical machine of claim 15, wherein the three-dimensional transport structure is a member selected from the group consisting of a microscale structure, a nozzle-type grating structure, an open pore foam structure, and a spiral-shaped channel structure.

24. A method for the manufacture of a three-dimensional transport structure to transport a coolant of a thermosiphon of an electrical machine, comprising additively material coating to form the three-dimensional transport structure.

25. The method of claim 24, wherein the material is a metallic material.

26. The method of claim 24, wherein the additive material coating step is executed by a beam-based powder bed process.

27. The method of claim 24, wherein the additive material coating step is executed by a selective laser melting to be employed.

28. The method of claim 24, wherein the additive material coating step is executed on a shaft of an electrical machine.

29. The method of claim 28, wherein the additive material coating step is executed in a hollow space of the shaft.

30. The method of claim 24, wherein the additive material coating step is executed on a body provided for introduction into a hollow shaft of an electrical machine.

31. The method of claim 24, for the manufacture of an electrical machine including a stator, a rotor having a hollow shaft configured to have a closed hollow space to accept a coolant, and a three-dimensional transport structure provided in the closed hollow space to transport the coolant.