Method for producing a winding of an electric machine

• US 10,396,639 B2
• Filed: 03/25/2015
• Issued: 08/27/2019
• Est. Priority Date: 04/29/2014
• Status: Active Grant

• Current Assignee: Vitesco Technologies GmbH (Continental AG)
• Original Assignee: CPT Group GmbH (Continental AG)
• Inventors: Radtke, Christoph, Weseler, Mario, Gellermann, Tassilo
• Primary Examiner(s): Arbes, Carl J
• Application Number:
  US15/306,009
• Publication Number:
  US 20170047826A1
• Time in Patent Office: 1,616 Days
• CPC Class Codes: H02K 15/0087 characterised by the method or apparatus for simultaneously twisting a plurality of hairpins open ends after insertion into the machine for simultaneously twisting a plurality of hairpins prior to mounting into the machine H02K15/0428

Abstract

A method for manufacturing a coil of an electrical machine includes providing a laminated core having a first and a second slot, and inserting a first winding segment in the first slot to a first region having a first end portion and a second winding segment in the second slot to a second area having a second end portion. The method includes adhering the first end portion by inserting in a first recess a bending device and by positioning of a retaining element into a locking position in the first recess, and holding the second end portion by inserting in a second recess of the bender. The method includes bending the first and the second range in a bending direction to a first bending angle. The method also includes releasing the first end portion, and turning the second region in the bending direction to a second bending angle.

Claims

1. A method for producing a winding of a winding carrier of an electric machine, the method comprising the following method steps:

providing a laminated core that includes at least one first slot for receiving at least one first winding segment of the winding and at least one second slot for receiving at least one second winding segment of the winding;

inserting the at least one first winding segment into the at least one first slot up to at least one first region that includes a first exposed end portion, and inserting the at least one second winding segment into the at least one second slot up to at least one second region that includes a second exposed end portion;

retaining the first end portion as a result of inserting the first end portion in a first recess of a first bending device and as a result of positioning a first retaining element into a locking position in the first recess, and retaining the second end portion as a result of inserting the second end portion in a second recess of the first bending device;

bending the first and the second region in a first bending direction about a first bending angle as a result of rotating the first bending device about a rotational axis concentrically with respect to the laminated core, whilst the first and the second end portions are retained;

releasing the first end portion as a result of moving the first retaining element from the locking position into an unlocking position; and

bending the second region further in the first bending direction about a second bending angle once the first end portion has been released.

2. The method of claim 1, wherein the step of providing additionally provides that the laminated core is provided with at least one third slot for receiving at least one third winding segment of the winding and at least one fourth slot for receiving at least one fourth winding segment of the winding, the at least one third slot and the at least one fourth slot are arranged along a second circle which is concentric with respect to the laminated core.

3. The method of claim 1, wherein the step of inserting additionally provides that the at least one third winding segment is inserted into the at least one third slot up to at least one third region that includes a third exposed end portion, and that the at least one fourth winding segment is inserted into the at least one fourth slot up to at least one fourth region that includes a fourth exposed end portion.

4. The method of claim 1, wherein the step of retaining additionally provides that the third end portion is retained as a result of insertion into a third slot of a second bending device and as a result of positioning a second retaining element in a locking position in the third recess, and the fourth end portion is retained as a result of insertion into a fourth recess of the second bending device.

5. The method of claim 1, wherein the step of bending additionally provides that the third and the fourth regions are bent as a result of rotating the second bending device about the rotational axis concentrically with respect to the laminated core in a second bending direction, which is opposite to the first bending direction, about a third bending angle, whilst the third and the fourth end portions are retained.

6. The method of claim 5, wherein during the step of bending, the first, the second, the third, and the fourth regions are bent substantially at the same time.

7. The method of claim 1, wherein the step of releasing additionally provides that the third end portion is released as a result of moving the second retaining element from the locking position into an unlocking position.

8. The method of claim 1, wherein the step of bending further additionally provides that the fourth region is bent further in the second bending direction about a fourth bending angle once the third end portion has been released.

9. The method of claim 8, wherein during the step of bending further, the second and the fourth regions are bent substantially at the same time.

10. The method of claim 5, wherein rotating the first bending device and the second bending device about the rotational axis and relative to the retaining device is by way of a rotating and sliding device.