Bus assembly, electrical motor, electric power steering system, and vehicle
View Patent ↗A bus assembly, an electrical motor, an electric power steering system, and a vehicle are provided. The bus assembly has multiple bus bars axially spaced along an electrical motor. Each bus bar has multiple bus segments arranged along the circumferential direction of the electrical motor. The bus segments of one of the bus bars have the same structure.
1 . A bus assembly for an electrical motor, comprising:
a plurality of bus bars comprising at least three phase bus bars and a neutral bus bar, wherein the plurality of bus bars are axially spaced along the electrical motor and each bus bar of the plurality of bus bars comprising a plurality of bus segments arranged circumferentially along the electrical motor, wherein:
the at least three phase bus bars are identical, being formed from the same dies and each phase bus segment of the plurality of bus segments comprises:
a main body segment;
a first welding hook, provided on the main body segment; and
a sub connecting portion, provided at one end of the main body segment; and
the neutral bus bar is provided at a side of the at least three phase bus bars in the axial direction, and a structure of the neutral bus bar is different from a structure of the phase bus bars.
2 . The bus assembly according to claim 1 , wherein:
each of the three phase bus bars comprises a plurality of connecting portions, and the connecting portions are used for assembling a terminal assembly of the electrical motor; and
the at least three phase bus bars comprise a first bus bar, a second bus bar and a third bus bar, which are axially arranged in sequence, wherein, the second bus bar and the third bus bar rotate in the same direction around a central axis with respect to the first bus bar.
3 . The bus assembly according to claim 2 , wherein:
the rotating angle of the second bus bar with respect to the first bus bar is the same as the rotating angle of the third bus bar with respect to the second bus bar.
4 . The bus assembly according to claim 2 , wherein:
the plurality of bus segments of each phase bus bar comprise two phase bus segments, and the two phase bus segments are symmetrically arranged; and the sub connecting portion of one phase bus segment is welded to the sub connecting portion of another phase bus segment to form a connecting portion.
5 . The bus assembly according to claim 4 , wherein the first welding hook comprises:
a plurality of welding arms, connected at intervals to the main body segment, wherein the plurality of welding arms and the main body segment form a wire accommodating area, the wire accommodating area is configured to accommodate a winding of the electrical motor; and
wherein volumes of at least two welding arms in the plurality of welding arms are different.
6 . The bus assembly according to claim 4 , wherein:
one phase bus bar comprises four first welding hooks arranged at even intervals, and
two first welding hooks are provided on one phase bus segment.
7 . The bus assembly according to claim 4 , wherein:
the first welding hooks extend away from the central axis, and
the sub connecting portions extend away from the central axis.
8 . The bus assembly according to claim 2 , wherein:
the plurality of bus segments of each neutral bus bar comprise two neutral bus segments,
the two neutral bus segments are arranged symmetrically at intervals along the circumferential direction, and
each neutral bus segment of the two neutral bus segments comprises a second welding hook extending towards the central axis.
9 . The bus assembly according to claim 1 , wherein the bus assembly further comprises:
a bus framework, wherein the plurality of bus bars are arranged at intervals on the bus framework; and
a positioning portion, provided on the bus framework, wherein the positioning portion is configured to cooperate with a stator framework of the electrical motor, and the positioning portion comprises:
a first positioning element, provided on a wall surface of the bus framework close to a central axis of the electrical motor, and
a second positioning element, provided on the wall surface of the bus framework away from the central axis of the electrical motor.
10 . The bus assembly according to claim 9 , wherein a number of the first positioning element is greater than the number of the second positioning element.
11 . The bus assembly according to claim 9 , further comprising:
an assembling portion provided on the bus framework,
wherein the assembling portion is configured to assemble a terminal assembly of the electrical motor.
12 . The electrical motor comprising the bus assembly according to claim 1 , further comprising:
a housing, wherein the bus assembly is provided in the housing; and
a stator framework provided at the side of the bus assembly in the axial direction, wherein a winding is provided on the stator framework and the winding is connected to the first welding hook of the bus assembly.
13 . The electrical motor according to claim 12 , wherein the stator framework comprises:
a framework body; and
a cooperating portion provided at the side of the framework body close to the bus assembly, wherein the cooperating portion is connected to a positioning portion of the bus assembly.
14 . The electrical motor according to claim 12 , wherein the electrical motor further comprises:
a control assembly, provided at the other side of the bus assembly along the axial direction, wherein the control assembly comprises a controller; and
a terminal assembly, wherein the terminal assembly comprises a terminal framework and a wiring terminal provided on the terminal framework, the wiring terminal is connected between a connecting portion of the bus assembly and the controller, and the terminal framework is installed at an assembling portion of the bus assembly.
15 . The electrical motor according to claim 14 , wherein:
a plurality of wiring terminals are arranged at intervals on one terminal framework;
a plurality of first welding hooks of the bus assembly comprise third welding hooks located between adjacent wiring terminals; and
the terminal assembly further comprises an avoid opening, the avoid opening being provided in the terminal framework corresponding to the third welding hooks.
16 . An electric power steering system comprising the electrical motor according to claim 13 .
17 . A vehicle comprising the electric power steering system according to claim 16 .