INTERCONNECTION ELEMENT FOR CONNECTION OF STATOR COILS

• US 20170085145A1
• Filed: 03/02/2015
• Published: 03/23/2017
• Est. Priority Date: 03/24/2014
• Status: Active Grant

• Current Assignee: Valeo Equipements Electriques Moteur (Valeo SE)
• Original Assignee: Valeo Equipements Electriques Moteur (Valeo SE)
• Inventors: El Baraka, Khadija, Jugovic, Svetislav, Armiroli, Paul
• Granted Patent: US 10,256,692 B2
• Time in Patent Office: Days
• CPC Class Codes: H02K 3/28 Layout of windings or of connections between windings windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32
• CPC Class Codes: H02K 3/522 for generally annular cores with salient poles

Abstract

An interconnection element (24) for connecting the stator coils of a polyphase rotary electric machine (2), including a plurality of conductive layers stacked axially, including the same number of solid base layers (26, 28, 30), and additional layers (32, 34, 36), each formed by a plurality of ring portions, each one of the ring portions not covering the entire perimeter of the stator, each one of the conductive layers having internal connection tabs (40) for connecting the coils and external connection tabs (48, 50) for connecting to connected electrical devices (4, 20), the number of base layers and additional layers being equal to the number of phases of the machine to which the interconnection element is added.

Claims

1. Interconnection element (24) for connection of stator coils of a polyphase rotary electrical machine (2), comprising a plurality of axially stacked conductive layers, including the same number of solid base layers (26, 28, 30), and additional layers (32, 34, 36) each formed by a plurality of parts of rings, each of said parts of rings not covering all of the periphery of the stator, each of these conductive layers supporting inner connection lugs (40) for connection of the coils, and outer connection lugs (48, 50) for connection to connected electrical equipment (4, 20), the number of base layers and additional layers being equal to the number of phases of the machine on which the interconnection element is added.

2. Interconnection element (24) according to claim 1, wherein the additional layers (32, 34, 36) are formed by two half-rings.

3. Interconnection element according to claim 1, wherein the layers (26, 28, 30, 32, 34, 36) are arranged axially above one another, without electrical contact with one another.

4. Interconnection element according to claim 1, wherein the inner connection lugs (40) face towards the interior of the interconnection element, and the outer connection lugs (48, 50) extend the outer lateral wall (38) of the layers which form the interconnection element.

5. Interconnection element according to claim 1, wherein each conductive layer (26, 28, 30, 32, 34, 36) supports a number of inner connection lugs (40) which is equal to the number of coils per phase, whereas the number of outer connection lugs (48, 50) is independent from the number of coils, with the base layers (26, 28, 30) each supporting a single outer connection lug (48), whereas the additional layers support a plurality of outer connection lugs (50), one per part of ring.

6. Interconnection element according to claim 1, wherein the outer connection lugs (50) which are associated with the additional layers are supported by one of the ends of each of the parts of ring.

7. Interconnection element according to claim 1, wherein, for each additional layer, all of the parts of ring of the said additional layer have an angular dimensional which is smaller than that of the base layers (26, 28, 30), such that a rupture area (52) is formed between the ends opposite of two parts of ring of a single additional layer.

8. Interconnection element according to claim 1, wherein each of the parts of ring which forms part of an additional layer (32, 34, 36) has a structure identical to that of the adjacent part of ring, with the parts of ring which are arranged axially above one another being offset angularly around the common axis of the machine and the interconnection element, such that the inner connection lugs (40) do not overlap, and are distributed angularly regularly.

9. Interconnection element according to claim 8, wherein the angular offsetting with which the parts of ring of the different additional layers are arranged relative to one another is equal to 360°

divided by the total number of inner connection lugs (40) supported by the base layers (36, 38, 30).

10. Interconnection element according to claim 1, wherein the inner connection lugs of the additional layers (32, 34, 36) are arranged angularly regularly, in the vicinity of the inner connection lugs of the base layers (26, 28, 30).

11. Interconnection element according to claim 1, wherein the inner connection lugs (40) comprise a lateral extension (42) which extends towards the interior of the interconnection element, on the plane of the layer which supports the connection lug, and a raised edge (44) which extends at the free end of the lateral extension, substantially perpendicularly to the latter, the raised edges (44) of the inner connection lugs all being oriented axially in the same direction, i.e. the direction which goes opposite the base layers.

12. Interconnection element according to claim 11, wherein each raised edge (44) comprises an undulating part forming a groove (46) which faces towards the layers of the interconnection element, and can receive the connection wires of the coils.

13. Three-phase machine with twelve coils per phase, in which an interconnection element (24) according to claim 1 comprises six layers, amongst which three base layers (26, 28, 30) have a solid annular profile and three additional layers (32, 34, 36) have a partial annular profile formed by two half-rings which are separated by two diametrically opposite rupture areas (52), with each base layer supporting twelve inner connection lugs for the connection of the coils (40), and each half-ring forming in pairs an additional layer which supports six inner connection lugs also for connection of the coils, the inner connection lugs being arranged such that an inner connection lug which is associated with an additional layer is arranged in the vicinity of an inner connection lug which is associated with a base layer, and such that the successive connection lugs of a single layer are distributed angularly with a regular angular pitch of 30°

.

14. Machine according to the preceding claim 13, wherein six coils of a single phase are connected firstly to the six inner connection lugs associated with one of the half-rings of one of the additional layers, and secondly to six inner connection lugs associated with one of the base layers, whereas the six remaining coils of the same phase are connected firstly to the six inner connection lugs associated with the opposite half-ring of said additional layer, and secondly to the remaining six inner connection lugs associated with said base layer.

15. Interconnection element according to claim 2, wherein the layers (26, 28, 30, 32, 34, 36) are arranged axially above one another, without electrical contact with one another.

16. Interconnection element according to claim 2, wherein the inner connection lugs (40) face towards the interior of the interconnection element, and the outer connection lugs (48, 50) extend the outer lateral wall (38) of the layers which form the interconnection element.

17. Interconnection element according to claim 3, wherein the inner connection lugs (40) face towards the interior of the interconnection element, and the outer connection lugs (48, 50) extend the outer lateral wall (38) of the layers which form the interconnection element.

18. Interconnection element according to claim 2, wherein each conductive layer (26, 28, 30, 32, 34, 36) supports a number of inner connection lugs (40) which is equal to the number of coils per phase, whereas the number of outer connection lugs (48, 50) is independent from the number of coils, with the base layers (26, 28, 30) each supporting a single outer connection lug (48), whereas the additional layers support a plurality of outer connection lugs (50), one per part of ring.

19. Interconnection element according to claim 3, wherein each conductive layer (26, 28, 30, 32, 34, 36) supports a number of inner connection lugs (40) which is equal to the number of coils per phase, whereas the number of outer connection lugs (48, 50) is independent from the number of coils, with the base layers (26, 28, 30) each supporting a single outer connection lug (48), whereas the additional layers support a plurality of outer connection lugs (50), one per part of ring.

20. Interconnection element according to claim 4, wherein each conductive layer (26, 28, 30, 32, 34, 36) supports a number of inner connection lugs (40) which is equal to the number of coils per phase, whereas the number of outer connection lugs (48, 50) is independent from the number of coils, with the base layers (26, 28, 30) each supporting a single outer connection lug (48), whereas the additional layers support a plurality of outer connection lugs (50), one per part of ring.