ELECTRICAL HOLLOW CONDUCTOR FOR AN ELECTROMAGNETIC MACHINE

• US 20170126084A1
• Filed: 04/02/2015
• Published: 05/04/2017
• Est. Priority Date: 04/04/2014
• Status: Active Grant

• Current Assignee: dynamic E flow GmbH
• Original Assignee: dynamic E flow GmbH
• Inventors: Schweinert, Nikolaus
• Granted Patent: US 10,454,329 B2
• Time in Patent Office: Days
• CPC Class Codes: H02K 3/22 consisting of hollow conductors
• CPC Class Codes: H02K 9/193 with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium

Abstract

This invention relates to an electrical hollow conductor (1) in the shape of a tubular body (2) having a hollow interior (3) for continuously winding an electromagnetic coil, wherein the body (2) comprises an electrically conductive material, has an outside diameter and an inside diameter, and is coated with an electrically insulating layer (4) on an outer casing surface of the body (2) and wherein the interior (3) is configured so that it hydraulically or pneumatically connects a first open end of the body (2) and a second open end of the body (2). In order to specify an electrical hollow conductor (1) that can be used for small and mid-sized electromagnetic machines, this invention proposes that a ratio of the outside diameter to the inside diameter is in a range of 1.25:1 to 4:1. This invention further relates to a use of the electrical hollow conductor (1), a connecting piece for the electrical hollow conductor (1), and an electromagnetic machine that has the electrical hollow conductor (1).

Claims

1-17. -17. (canceled)

18. An electrical hollow conductor in the shape of a tubular body having a hollow interior, wherein the body comprises an electrically conductive material, has an outside diameter and an inside diameter, and is coated with an electrically insulating layer on an outer casing surface of the body, wherein a ratio of the outside diameter to the inside diameter is in a range of 1.25:

1 to 4;

1, wherein the electrical hollow conductor is wound into a coil, the body is configured as a cylindrical tube, and the outside diameter of the body is in a range of 1.0 mm to 3.2 mm.

19. The electrical hollow conductor according to claim 18, wherein the material is copper, aluminum, copper alloy, aluminum alloy, or combinations thereof.

20. The electrical hollow conductor according to claim 18, wherein a tensile strength of the electrical hollow conductor is in a range of 75 N/mm2 to 225 N/mm2.

21. A method of use of the electrical hollow conductor according to claim 18, the method including continuously winding the electrical hollow conductor into an electromagnetic coil having at least one complete turn.

22. The method of use according to claim 21, wherein the electromagnetic coil is an electromagnetic coil of an electromagnetic machine with a maximum output of less than 5 MW.

23. A connecting piece for connecting the electrical hollow conductor according to claim 18 and a coolant line, the connecting piece comprising a leak-proof housing having a hollow interior, at least one hollow conductor opening in the housing for receiving an open end of the electrical hollow conductor and a coolant line opening in the housing for receiving an open end of the coolant line, wherein the hollow interior of the housing is configured so that it hydraulically or pneumatically connects the hollow conductor opening and the coolant line opening, wherein the hollow conductor opening has a diameter that is adapted to an outside diameter of a body of the electrical hollow conductor to be received.

24. The connecting piece according to claim 23, wherein the connecting piece has a housing insert, wherein the housing insert is configured so that it passes through the housing and wherein a hollow interior of the housing insert provides the hollow conductor opening.

25. The connecting piece according to claim 23, wherein the hollow interior is configured as rounded.

26. The connecting piece according to claim 23, wherein the connecting piece is configured to connect at least two electrical hollow conductors and a coolant line, wherein the connecting piece comprises at least two hollow conductor openings in the housing for receiving open ends of the electrical hollow conductors, wherein the hollow interior is configured so that it hydraulically or pneumatically connects the hollow conductor openings and the coolant line opening, wherein the connecting piece has an electrically conductive contact element and an electrically insulating separator element, wherein the contact element is configured so that it electrically connects at least two hollow conductor openings, and wherein the separator element is arranged in an electrically insulating manner between the contact element and the hollow conductor openings on the one hand and the coolant line opening on the other hand.

27. The connecting piece according to claim 26, wherein the contact element is the housing and that the separator element is configured as an electrically insulating sleeve passing through the housing, wherein a hollow interior of the electrically insulating sleeve provides the coolant line opening.

28. The connecting piece according to claim 26, wherein a first group of electrically connected hollow conductor openings is electrically insulated by means of the separator element or by means of another separator element from a second group of electrically connected hollow conductor openings.

29. The connecting piece according to claim 26, wherein the hollow conductor openings have different diameters.

30. An electromagnetic machine, comprising a magnet unit and a conductor unit electromagnetically interacting with the magnet unit, wherein the conductor unit has at least one electrical conductor, wherein the electrical conductor is the electrical hollow conductor according to claim 18.

31. The electromagnetic machine according to claim 30, wherein the electromagnetic machine has at least one connecting piece.

32. The electromagnetic machine according to claim 30, wherein the electromagnetic machine has a cooling unit, wherein the cooling unit comprises a pump and the electrical hollow conductor, wherein the pump is configured so that it pumps a coolant through the electrical hollow conductor.