Machine coil for an electric machine

Abstract

A machine coil (1) for an electric machine (16) comprises at least one winding (3). The winding (3) comprises multiple winding layers (4), arranged respectively adjacent to one another and connected with one another in an electrically conductive manner, made of an electrical conductor. A heat conductor (6) is arranged between two winding layers (4) arranged adjacent to one another and is connected with at least one winding layer (4) in a heat-exchanging manner. At least one section (7) of the heat conductor projects out of the winding (3). A cooling pipe, connectable with a cooler, is arranged on the section (7) and connected with the section (7) in a heat-exchanging manner.

Claims

1.-13. (canceled)

14. A machine coil (1) for an electric machine (16), wherein the machine coil (1) comprises at least one winding (3), wherein the winding (3) comprises multiple winding layers (4) of an electrical conductor, the multiple winding layers (4) being arranged adjacent to one another and connected to one another in an electrically conducting manner, wherein a heat conductor (6) is arranged between two of the multiple winding layers (4) and is connected with at least one winding layer (4) in a heat-exchanging manner, wherein at least one section (7) of the heat conductor projects out of the winding (3), and wherein a cooling pipe, connectable with a cooler (26), is arranged on the at least one section (7) and is connected with the at least one section (7) in a heat-exchanging manner.

15. The machine coil (1) according to claim 14, wherein the electrical conductor is produced of a superconductive electric material.

16. The machine coil (1) according to claim 14, wherein the machine coil (1) comprises multiple heat conductors (6), and wherein each of the multiple heat conductors (6) is arranged between two adjacent winding layers (4).

17. The machine coil (1) according to claim 16, wherein the heat conductor (6) and the cooling pipe (8) are produced of a metallic material and wherein the cooling pipe (8) is connected, at least in sections, with the heat conductor (6) through a solder connection.

18. The machine coil (1) according to claim 14, wherein the heat conductor (6) comprises at least one electrically insulating layer (10) arranged between at least one winding layer (4) adjoining heat conductor (6) and the heat conductor (6).

19. The machine coil (1) according claim 14, wherein the heat conductor (6) is connected with at least one winding layer (4) adjoining the heat conductor (6) in an electrically conductive manner.

20. The machine coil (1) according to claim 14, wherein the cooling pipe (8) comprises an electrically insulating section (11) arranged distanced to the winding (3).

21. The machine coil (1) according to claim 14, wherein the winding (3) is configured toroidally, and wherein the winding (3) is produced of a strip-shaped electrical conductor material.

22. An electric machine (16), comprising: a stator (17); a rotor (27); and multiple machine coils (1) as in claim 15, wherein the windings (3) of the multiple machine coils (1) are arranged in a thermal insulator (19), and wherein the electric machine (16) comprises a cooler (26) connected with the cooling pipe in a heat-conducting manner.

23. The electric machine (16) according to claim 22, wherein the thermal insulator (19) comprises regions in which a vacuum can be generated.

24. The electric machine (16) according to claim 22, wherein the thermal insulator (19) consists of a material which has a high electrical resistance.

25. The electrical machine (16) according to claim 22, wherein the cooler (26) comprises a cryocooler (22) or is flown through by a liquid or gaseous refrigerant in an open cooling circuit.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG. 1 is a schematically illustrated plan view onto a machine coil.

[0039] FIG. 2 a schematically illustrated sectional view of the machine coil represented in FIG. 1 along the section line I-I.

[0040] FIG. 3 a schematically illustrated sectional view of an alternatively configured machine coil.

[0041] FIG. 4 is a schematically illustrated view of an electric machine.

DETAILED DESCRIPTION

[0042] FIG. 1 schematically illustrates a plan view onto a machine coil 1, and FIG. 2 a sectional view of the machine coil 1 along the sectional line I-I. The machine coil 1 comprises a winding 3 including multiple winding sections 2. The winding 3 or the winding sections 2 comprise multiple winding layers 4, arranged adjacent to each other and connected with one another in an electrically conductive manner, made of an electrical conductor. Individual winding layers 4 are exemplarily denoted in the illustration by a reference character.

[0043] The winding layers 4 respectively comprise a turn about a turning axis 5. The electrical conductor is configured strip-shaped and made of a superconducting material. The winding 3 is configured toroidally.

[0044] Between two winding layers 4 arranged adjacent to one another, a heat conductor 6 is arranged and is connected with at least one winding layer 4 in heat-exchanging manner. In addition, a heat conductor 6 is arranged on a first inner winding layer 4. In each case one section 7 of the heat conductors 6 projects out of the winding 3. In each case one cooling pipe 8 is arranged on the section 7 and is connected with the section 7 in a heat-exchanging manner.

[0045] Between the winding layers 4 adjacent to the heat conductors 6 and the heat conductors 6, in each case one electric insulating layer 9 of the heat conductor 6 is arranged. In addition, the winding layers 4 are electrically insulated relative to each other via electric insulating layers 10. Additionally, the cooling pipes 8 respectively comprise an electrically insulating section 11. Individual electric insulating layers 10 are exemplarily denoted with a reference character in the illustration.

[0046] The heat conductors 6 rest nearly completely on the respectively adjacently arranged winding layers 4. The heat conductors 6, however, each comprise an interruption section 12, in which the respective heat conductor 6 is completely interrupted so that no closed conductor loop is formed by the heat conductors 6 resting on the winding layers 4.

[0047] The winding sections respectively comprise contact points 13, in which the winding sections 2 can be connected amongst themselves and with an electrical supply device. In addition, the cooling pipes 8 respectively comprise connecting elements 14 for connection of the cooling pipes with a cooler.

[0048] FIG. 3 schematically illustrates a sectional view of an alternatively configured machine coil 1. In the machine coil 1 illustrated in FIG. 3, the section 7 of the heat conductors 6 respectively projects into an intermediate region 15 between two windings 3 arranged distanced to one another. In this way, two windings 3 of the machine coil 1 can be cooled with the help of the heat conductors 6 and the cooling pipes 8 connectable with the cooler.

[0049] FIG. 4 shows a schematic illustration of an electric machine 16 with a stator 17, on which multiple machine coils 1 are arranged. Windings 3 of the machine coils 1 consist of a superconductive material. Between two winding layers of the windings 3, in each case one heat conductor 6 is arranged with a cooling pipe 8. The machine coils 1 further comprise coil cores 18.

[0050] The stator 17 is arranged inside a thermal insulator 19, which is formed by two cylindrical vacuum pipes 20, 21, arranged coaxially to one another, and vacuum pipe lids (not illustrated).

[0051] Respectively, only one machine coil 1, one winding 3, one heat conductor 6, one cooling pipe 8 and one coil core 18, is denoted with an assigned reference character in the drawing, for illustrative purposes.

[0052] The cooling pipes 8 are connected with a cryocooler 22 via pipelines 23, wherein feed lines from the pipelines 23 to the cooling pipes 8 are not represented and are indicated through the course illustrated in dashed lines. A cryogenic fluid is circulated inside this cooling circuit formed by the cooling pipes 8, the cryocooler 22, the pipelines 23, a coolant pump 24 and a regulating device 25, with the help of the coolant pump 24, inside this cooling circuit. The coolant through-flow rate is controlled with the regulating device 25. The cryocooler 22, the coolant pump 24, the pipelines 23, including the non-illustrated feed lines, and the regulating device 25 form a cooler 26.

[0053] A rotor 27 is located in the interior of the electric machine 1. The windings 3 of the machine coils 1 are supplied with a rotary current via electrical connections 28 by a frequency converter (not illustrated).