Active part of an electric machine

• US 10,454,332 B2
• Filed: 10/02/2015
• Issued: 10/22/2019
• Est. Priority Date: 10/08/2014
• Status: Active Grant

• Current Assignee: Flender GmbH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Bogdan, Zolt, Iles, Janos, Lindmeier, Andreas, Schonbauer, Norbert, Vukovic, Mirjana, Brenner, Robin, Ratzisberger, Dominik, Teringl, Claus
• Primary Examiner(s): Le, Dang D
• Application Number:
  US15/517,851
• Publication Number:
  US 20170310185A1
• Time in Patent Office: 1,481 Days
• CPC Class Codes: H02K 15/0037 Shaping or compacting winding heads H02K15/005, H02K15/0087 and H02K15/0428 take precedence
• CPC Class Codes: H02K 3/12 arranged in slots
• CPC Class Codes: H02K 3/38 around winding heads, equalising connectors, or connections thereto
• CPC Class Codes: H02K 3/47 Air-gap windings, i.e. iron-free windings

Abstract

An active part of an electric machine includes a plurality of coils, each having a sub-conductor. The coils are formed by windings of the sub-conductors thereof. The windings of a coil each have a predetermined winding length. In addition, the active part has a carrier part, in the grooves of which, the coils are arranged. The coils have a winding head region which projects from an end surface of the carrier part. The coils are also arranged in the form of a tiered winding. At least one of the coils has a V-shaped cross-section in the winding head region, as a result of an arrangement of its sub-conductor.

Claims

1. An active part of an electric machine, comprising:

a plurality of coils arranged in the form of a tiered winding, each coil having a sub-conductor and formed by windings of the sub-conductor, with the windings of a corresponding one of the coils having a pre-determined winding length; and

a carrier part having grooves for receiving the coils such that a winding overhang region of the coils projects at an end face of the carrier part, with at least one of the coils configured in a two-part form to define in the winding overhang region a first coil part and a second coil part which are arranged to form a V shape in cross-section and are insulated independently from each other,

wherein the coils are distanced from each other by a pre-defined minimum spacing such that three of the coils in the tiered winding have in relation to the end face of the carrier part an inclination of 0°

, 45° and

90°

, respectively, with a tolerance range between −

25° and

+25°

, with the one of the three coils at the 45°

inclination having a V shape in cross-section.

2. The active part of claim 1, constructed in the form of a stator or a rotor.

3. The active part of claim 1, wherein the winding lengths of pairs of the coils have a difference of a maximum of 5% from each other.

4. The active part of claim 1, wherein the winding lengths of pairs of the coils have a difference of a maximum of 3% from each other.

5. The active part of claim 1, wherein the sub-conductors have a sub-conductor insulation, and the coils and/or the first coil part and the second coil part each have a tape insulation.

6. The active part of claim 1, further comprising a tape insulation configured to hold the first coil part and the second coil part together.

7. An electric machine, comprising an active part, said active part including a plurality of coils arranged in the form of a tiered winding, each coil having a sub-conductor and formed by windings of the sub-conductor, with the windings of a corresponding one of the coils having a pre-determined winding length, and a carrier part having grooves for receiving the coils such that a winding overhang region of the coils projects at an end face of the carrier part, with at least one of the coils configured in a two-part form to define in the winding overhang region a first coil part and a second coil part which are arranged to form a V shape in cross-section and are insulated independently from each other, wherein the coils are distanced from each other by a pre-defined minimum spacing such that three of the coils in the tiered winding have in relation to the end face of the carrier part an inclination of 0°

, 45° and

90°

, respectively, with a tolerance range between −

25° and

+25°

, with the one of the three coils at the 45°

inclination having a V shape in cross-section.

8. The electric machine of claim 7, wherein the active part is constructed in the form of a stator or a rotor.

9. The electric machine of claim 7, wherein the winding lengths of pairs of the coils have a difference of a maximum of 5% from each other.

10. The electric machine of claim 7, wherein the winding lengths of pairs of the coils have a difference of a maximum of 3% from each other.

11. The electric machine of claim 7, wherein the sub-conductors have a sub-conductor insulation, and the coils and/or the first coil part and the second coil part each have a tape insulation.

12. The electric machine of claim 7, further comprising a tape insulation configured to hold the first coil part and the second coil part together.

13. A method for producing an active part, comprising:

arranging coils in grooves of a carrier part at a pre-defined minimum spacing from each other;

forming each of the coils with a winding overhang region such as to project at an end face of the carrier part;

arranging the coils in the form of a tiered winding such that three of the coils are arranged in the tiered winding with an inclination of 0°

, 45° and

90°

in relation to the end face of the carrier part, respectively, with a tolerance range between −

25° and

+25°

;

dividing at least one of the coils into a first coil part and into a second coil part such that the first and second coil parts form in the winding overhang region legs of a V shape in cross-section; and

insulating the first and second coil parts insulated independently of each other by a tape insulation.

14. The method of claim 13, further comprising holding the first and second coil parts together by a second tape insulation, so as to form the V shape in cross-section in the winding overhang region.