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CN-122003800-A - Motor stator and motor

CN122003800ACN 122003800 ACN122003800 ACN 122003800ACN-122003800-A

Abstract

A motor stator includes an iron core (1), windings (2) and a plurality of power buses (3). The power bus bar (3) comprises a first electrical connection (31), a first radial connection section (32), a first axial connection section (33) and a first common section (34). The first electrical connection (31) is connected to the first conductor connection (2 c 1), the first radial connection (32) is connected to the first electrical connection (31), and the first axial connection (33) is connected to the first radial connection (32). All the first axial connecting sections (33) are connected to a first common section (34), the first radial connecting section (32) is located axially outside the projecting portion (2 e), and the first axial connecting sections (33) and the first common section (34) are located radially outside the projecting portion (2 e) and are arranged overlapping the projecting portion (2 e) in the axial direction (a). Thereby, the axial dimension occupied by the structure of the busbar is reduced. A motor comprising the motor stator is also provided.

Inventors

  • LAN SHANCHAO
  • WANG XIAOQING
  • LUO WENTAO
  • WANG ZHAO

Assignees

  • 舍弗勒技术股份两合公司

Dates

Publication Date
20260508
Application Date
20240204

Claims (10)

  1. An electric machine stator comprising: An iron core (1); A winding (2) mounted to the core (1) and forming an electrical circuit including one or more branches, the winding (2) including a protruding portion (2 e) protruding from the core (1) toward an axially outer side, the winding (2) having a plurality of first conductor connections (2 c 1) formed in the protruding portion (2 e) and corresponding to the branches, the plurality of first conductor connections (2 c 1) being spaced apart from each other, and A plurality of power buses (3), each power bus (3) being electrically connected with all of the first conductor connections (2 c 1) of the branches for the same phase of power, the power buses (3) comprising first electrical connections (31), first radial connections (32), first axial connections (33) and first common sections (34) fixed to each other, the first electrical connections (31) being connected with the corresponding first conductor connections (2 c 1), the first radial connections (32) being connected with the corresponding first electrical connections (31), the first axial connections (33) being connected with the corresponding first radial connections (32), all of the first axial connections (33) of the same power bus (3) being connected with the first common sections (34), the first radial connections (32) being located axially outside the protruding portion (2 e), the first axial connections (33) and the first common sections (34) being located radially outside the protruding portion (2 e).
  2. The motor stator according to claim 1, characterized in that the first radial connection sections (32) of all the power buses (3) are located axially inside the first electrical connection (31).
  3. The motor stator according to claim 2, characterized in that the first radial connection sections (32) are formed in a flat configuration in the axial direction (a), and in that all the first radial connection sections (32) of the power bus bars (3) extend in the same plane.
  4. The motor stator according to claim 1, characterized in that the first axial connection section (33) extends along the axial direction (a) and the first common section (34) extends along the circumferential direction (C) of the motor stator (S).
  5. The motor stator according to any one of claims 1 to 4, characterized in that, The winding (2) having a plurality of second conductor connections (2 c 2) formed in the extension (2 e) and corresponding to the branches, the plurality of second conductor connections (2 c 2) being spaced apart from each other and from the plurality of first conductor connections (2 c 1), The motor stator (S) further comprises a neutral busbar (4), the neutral busbar (4) is electrically connected with all the second conductor connections (2 c 2), the neutral busbar (4) comprises second electrical connections (41), second radial connections (42), second radial connections (43) and second common sections (44) fixed to each other, the second electrical connections (41) are connected with the corresponding second conductor connections (2 c 2), the second radial connections (42) are connected with the corresponding second electrical connections (41), the second axial connections (43) are connected with the corresponding second radial connections (42), all the second axial connections (43) of the neutral busbar (4) are connected with the second common sections (44), the second radial connections (42) are located axially outside the protruding portion (2 e), and the second radial connections (43) and the second common sections (44) are located radially outside the protruding portion (2 e).
  6. The motor stator according to claim 5, characterized in that the neutral bus (4) further comprises a connecting bridge (46) located axially outside the protruding portion (2 e) and an additional common segment (47), a portion of the second electrical connection (41) being directly connected to the additional common segment (47), the additional common segment (47) being connected to one of the second radial connection segments (42) via the connecting bridge (46).
  7. An electric motor stator according to claim 5 or 6, characterized in that all the second radial connection segments (42) are located axially inside the second electrical connection (41).
  8. The motor stator according to claim 7, characterized in that the second radial connection sections (42) are formed in a flat configuration in the axial direction (a), and that all the second radial connection sections (42) extend in the same plane as all the first radial connection sections (32) of the power bus bars (3).
  9. The motor stator according to claim 5 or 6, characterized in that the second axial connection section extends along the axial direction (a) and the second common section (44) extends along the circumferential direction (C) of the motor stator (S).
  10. An electric machine comprising a machine stator (S) as claimed in any one of claims 1 to 9.

Description

Motor stator and motor Technical Field The present application relates to a connection structure of windings and a bus bar of a motor stator, and more particularly, to a motor stator and a motor including the same. Background In a pure electric vehicle or a hybrid vehicle, an electric motor is generally employed as a power source to drive the vehicle. In a motor stator, the windings may be electrically connected to a power source via a bus bar to achieve a desired circuit topology (e.g., a delta topology or a Y topology). In a typical example, the motor stator may include a power bus and a neutral bus, with the different conductor connections of the windings being soldered together to make electrical connection. For example, in chinese patent application publication No. CN 115250046A, entitled "bus bar and motor", the winding realizes an electrical circuit having a predetermined topology by means of bus bars provided at the end of the stator core and not exceeding the winding. In chinese patent publication No. CN 219643755U, entitled "bus bar, motor stator, and flat wire motor", the bus bar includes a plurality of connection bars arranged on an insulating base and arranged at intervals in a radial direction, through which windings realize an electrical circuit having a predetermined topology. In the technical solution represented by the above patent technique, although it is possible to reduce to some extent the axial space occupied by the structure of the busbar, in the case of a busbar having a more complex structure, the busbar inevitably needs to be layered alternately on the axially outer side of the protruding portion of the winding, which will result in an excessive axial dimension of the motor stator. Disclosure of Invention The present application has been made in view of the above state of the art. An object of the present application is to provide a motor stator whose bus bar structure has a relatively small axial dimension, and which does not increase the axial dimension of the bus bar structure even if the bus bar structure becomes more complicated. Another object of the present application is to provide an electric machine comprising the above-mentioned electric machine stator. In order to achieve the above object, the present application adopts the following technical scheme. The application provides a motor stator, comprising: an iron core; A winding mounted to the core and forming an electrical circuit including one or more legs, the winding including a protruding portion protruding axially outward from the core, the winding having a plurality of first conductor connections formed in the protruding portion and corresponding to the legs, the plurality of first conductor connections being spaced apart from one another, and Each power bus bar is electrically connected with the first conductor connecting parts of all the branches for the same-phase power supply, each power bus bar comprises a first electric connecting part, a first radial connecting section, a first axial connecting section and a first common section, the first electric connecting parts are connected with the corresponding first conductor connecting parts, the first radial connecting sections are connected with the corresponding first electric connecting parts, the first axial connecting sections are connected with the corresponding first radial connecting sections, all the first axial connecting sections of the same power bus bar are connected with the first common section, the first radial connecting sections are located on the outer axial side of the extending part, and the first axial connecting sections and the first common section are located on the outer radial side of the extending part and are arranged in an overlapping mode in the axial direction with the extending part. In an alternative, all of the first radial connection sections of the power bus bars are located axially inward of the first electrical connection. In a further alternative, the first radial connection sections are formed in a flat configuration in the axial direction, and the first radial connection sections of all the power supply buses extend in the same plane. In another alternative, the first axial connection section extends along the axial direction and the first common section extends along a circumferential direction of the motor stator. In another alternative, the winding has a plurality of second conductor connections formed in the extension and corresponding to the branches, the plurality of second conductor connections being spaced apart from each other and from the plurality of first conductor connections, The motor stator further comprises a neutral busbar electrically connected to all of the second conductor connections, the neutral busbar comprising a second electrical connection, a second radial connection, a second axial connection and a second common section fixed to each other, the second electrical connection being connected to th