COIL WINDING COMPRISING HF LITZ WIRE, ELECTRICAL MACHINE COMPRISING A COIL WINDING OF THIS KIND, AND METHOD FOR PRODUCING SAID COIL WINDING

Abstract

A coil winding for an electrical machine comprising litz wire that includes winding head sections and winding body sections, wherein the litz wire includes one or more baked-enamel wires having an outer layer composed of baked enamel, wherein the winding body sections are baked to one another by baking a baking material of the baked-enamel wires.

Claims

1. A coil winding for an electrical machine comprising: litz wire, which extends in winding head sections and winding body sections, wherein the litz wire includes baked-enamel wires having an outer layer which is composed of baked enamel, wherein the winding body sections are baked to one another by baking a baking material of the baked-enamel wires, but not baking the winding head sections.

2. The coil winding of claim 1, wherein the baked-enamel wire includes a thermoplastic baking material.

3. The coil winding of claim 1, wherein two winding body sections extend parallel to one another and run between two winding head sections.

4. (canceled)

5. (canceled)

6. (canceled)

7. A method for producing an electrical machine, comprising: winding a litz wire to a coil winding, wherein the litz wire comprises of baked-enamel wires having each an outer layer composed of baked enamel; baking the coil winding in winding body sections, but not baking winding head sections of the coil winding; inserting the coil winding in a groove of the electrical machine.

8. The method of claim 7, wherein the winding head sections are compressed after inserting the coil winding in the groove.

9. The method of claim 7, wherein the baked winding body sections correspond to an active length of the electrical machine.

10. The method of claim 7, wherein the winding body sections are provided after baking with an insulating layer.

11. A coil winding for an electrical machine, comprising: litz wire that includes winding head sections and winding body sections, wherein the litz wire includes one or more baked-enamel wires having an outer layer composed of baked enamel, wherein the winding body sections are baked to one another by baking a baking material of the baked-enamel wires.

12. The coil winding for an electrical machine of claim 11, wherein the baked-enamel wire includes a thermoplastic baking material.

13. The coil winding for an electrical machine of claim 11, wherein two winding body sections extend parallel to one another and run between two winding head sections.

14. The coil winding for an electrical machine of claim 11, wherein the winding head sections are capable of being compressed.

15. The coil winding for an electrical machine of claim 11, wherein the winding head sections are not baked.

16. The coil winding for an electrical machine of claim 15, wherein the winding head sections are capable of being compressed.

17. The coil winding for an electrical machine of claim 11, wherein the litz wire is a high-frequency (HF) litz wire.

18. The coil winding for an electrical machine of claim 11, wherein the winding body sections include a solidified region.

19. The coil winding for an electrical machine of claim 11, wherein the winding body sections include an outer insulating layer.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0017] Preferred embodiments of the disclosure and its advantages and details are subsequently described in more detail by means of the enclosed FIGURE.

[0018] FIG. 1 discloses a side view of a coil winding arranged in a baking tool.

DETAILED DESCRIPTION

[0019] FIG. 1 shows an inventive coil winding 01, which is arranged in a baking tool 04. The coil winding 01 may later become part of an electrical machine (not shown) and can there be inserted in a groove of the electrical machine. The baking tool 04 also comprises a groove, which corresponds to the dimensions of the groove of the electrical machine and in which the actual baking process takes place.

[0020] The coil winding 01 consists of an HF litz wire, which comprises a large number of baked-enamel wires. The baked-enamel wires each have an outer layer composed of baked enamel. The coil winding 01 has winding body sections 02 and winding head sections 03. After baking, the winding body sections 02 form a solidified region. This solidified region is produced by baking the baking material of the baked-enamel wires. For this purpose, the winding body sections 02 are inserted in the groove of the baking tool 04.

[0021] In the region of the winding head sections 03, the coil winding 01 is not baked and thus remains flexible. After inserting the coil winding 01 in the groove of the electrical machine, the flexible winding head sections 03 can be compressed, which minimizes the height of the winding head. After the baking process, the winding body sections 02 of the coil winding 01 can be provided with an outer insulating layer.

LIST OF REFERENCE NUMERALS

[0022] 01 coil winding [0023] 02 winding body sections [0024] 03 winding head sections [0025] 04 baking tool