JP-7855682-B2 - Stator of a rotating electric machine

JP7855682B2JP 7855682 B2JP7855682 B2JP 7855682B2JP-7855682-B2

Inventors

立野啓輔

Assignees

Ａｓｔｅｍｏ株式会社

Dates

Publication Date: 20260508
Application Date: 20220412

Claims (7)

A cylindrical core having multiple slots, A coil arranged in a slot, the ends of which are connected to form 2n sets of Y-connections (where n is an integer of 1 or more) consisting of phase windings with different electrical phases, It comprises a connection section for connecting the aforementioned coil, The connection section comprises a first conductive plate material, a second conductive plate material, and a third conductive plate material that connect the ends of the coils of the same phase, and a neutral point connecting plate material that connects the neutral points of the phase winding group. The neutral point connecting plate connects the coil arranged in the radially inner layer of the core and the coil arranged in the radially outer layer of the core. The neutral point connecting plate material is divided into multiple parts in the circumferential direction of the core, The connection portion is arranged such that at least one of the first conductive plate material, the second conductive plate material, and the third conductive plate material, and at least one of the divided neutral point connection plate material, overlap in the axial direction of the core . A stator for a rotating electric machine, wherein each of the divided neutral point connecting plate members is positioned at a different location in the axial direction of the core .
A stator for a rotating electric machine according to claim 1, The connection section is a stator for a rotating electric machine, in which two of the first conductive plate material, the second conductive plate material, and the third conductive plate material and one of the divided neutral point connection plate material are arranged to overlap in the axial direction of the core.
A stator for a rotating electric machine according to claim 1, The neutral point connecting plate material is, The core has a connecting base along the circumferential direction, A connecting portion that protrudes radially from the connecting base of the core, This is a portion provided at the end of the connection portion, and has a coil coupling portion that is connected to the coil end, which is the end of the coil. The coil has a projection that protrudes from the core along the axial direction, The aforementioned connecting portion is a stator of a rotating electric machine, provided between the aforementioned protruding portions.
A stator for a rotating electric machine according to claim 3 , Each coil coupling portion has at least one coil coupling terminal which is coupled to one single-phase coil constituting the group of phase windings. A stator for a rotating electric machine, wherein the number of coil coupling terminals provided in one of the coil coupling portions is the same as the number n.
A stator for a rotating electric machine according to claim 4 , A stator for a rotating electric machine, wherein the cross-sectional area of the coil coupling terminal is smaller than the cross-sectional area of the connection portion and is the same as the cross-sectional area of the coil end.
A stator for a rotating electric machine according to claim 4 , A stator for a rotating electric machine, wherein each of the adjacent coil coupling portions is coupled to each of the single-phase coils arranged in the adjacent slots.
A stator for a rotating electric machine according to claim 1, The stator of a rotating electric machine, wherein the first conductive plate material, the second conductive plate material, the third conductive plate material, and the neutral point connecting plate material are pre-processed plate materials.

Description

This invention relates to a stator for a rotating electric machine. Rotating electric machines are widely used, and miniaturization is required when they are mounted on moving objects such as automobiles. Patent Document 1 discloses a rotating electric machine comprising a stator core, a stator winding composed of a plurality of segment coils, and a connection plate for fixing interphase connecting conductors that connect different phases of the segment coils of the stator winding and interphase connecting conductors that connect segment coils of the same phase of the stator winding, wherein the stator winding has a coil connection portion on one side with respect to the axial direction of the stator core to which the ends of the plurality of segment coils are connected to each other, and the connection plate is positioned on the side of the stator core where the coil connection portion is located. International Publication No. 2017/195481 External view of the statorConnection diagram of the first and second neutral wiresEnlarged view of the wiring sectionFigure 3, IV-IV cross-sectional viewExploded view of the wiring sectionSchematic diagram showing the positional relationship of the connection points.Enlarged view showing the connection point between the single-phase coil and the wiring section.Diagram showing variations in the wiring configuration. —Embodiment— The following describes an embodiment of the stator of a rotating electric machine with reference to Figures 1 to 7. Figure 1 is an external view of the stator 100. The stator 100 comprises a cylindrical core 1 having slots 2, a winding coil 20 inserted into the slots 2, and a connection portion 30 connecting the winding coil 20 to the outside. In this embodiment, the axial direction X, radial direction R, and circumferential direction C are defined. The axial direction X is a straight line parallel to the axis of the cylindrical core 1. The radial direction R is a straight line perpendicular to the axis of the core 1 and passing through the axis of the core 1. The circumferential direction C is the direction along the outer circumference of the core 1. The winding coil 20 is composed of a group of phase windings with different electrical phases. Specifically, the winding coil 20 includes a U-phase coil 21, a V-phase coil 22, and a W-phase coil 23. The winding coil 20 in this embodiment has four sets of Y-connected coils. Hereinafter, the U-phase coil 21, V-phase coil 22, and W-phase coil 23 will each be collectively referred to as a "single-phase coil" 20A. That is, the winding coil 20 in this embodiment is composed of 12 single-phase coils 20A, since there are 3 phases x 4 sets. A single-phase coil 20A can also be said to be one of the phase windings that make up the group of phase windings. At the axial X end of the winding coil 20, a protruding portion 20S is periodically formed along the circumferential direction C, protruding from the core 1 along the axial direction X. The connection section 30 serves to connect the single-phase coils 20A within the stator 100 and to connect to the outside of the stator 100. The connection section 30 includes a U-phase busbar 31, a V-phase busbar 32, a W-phase busbar 33, a first neutral wire 34, and a second neutral wire 35. The U-phase busbar 31 connects the U-phase coils 21 and has an external connection terminal. The V-phase busbar 32 connects the V-phase coils 22 and has an external connection terminal. The W-phase busbar 33 connects the W-phase coils 23 and has an external connection terminal. The first neutral wire 34 and the second neutral wire 35 only provide connections between the single-phase coils 20A within the stator 100 and do not have external connection terminals for the stator 100. The U-phase busbar 31, V-phase busbar 32, and W-phase busbar 33 are each connected to four single-phase coils 20A. The first neutral wire 34 and the second neutral wire 35 are each connected to six single-phase coils 20A. The U-phase busbar 31, V-phase busbar 32, W-phase busbar 33, the first neutral wire 34, and the second neutral wire 35 are each plate-shaped members formed by sheet metal processing of a plate material. Figure 2 is a connection diagram of the first neutral wire 34 and the second neutral wire 35. While it is possible to provide four neutral points connecting each of the UVW layers, in this embodiment, to reduce the number of parts, neutral wires are provided connecting two sets of each of the UVW layers. In this case, it is conceivable to simply configure neutral wires connecting two sets of neutral points, as shown as State 1 at the top of Figure 2. Furthermore, since it is possible to connect to other sets based on the characteristics of the neutral points, the configuration can be rearranged as shown in State 2. State 3 is a reorganized version of the description in State 2. In this embodiment, the wiring in State 3 is adopted. Figure 3 is an enlarged view of the connection section 30. The ar