WO2019062903A1 - 定子组件和具有其的电机和车辆 - Google Patents

定子组件和具有其的电机和车辆 Download PDF

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Publication number
WO2019062903A1
WO2019062903A1 PCT/CN2018/108613 CN2018108613W WO2019062903A1 WO 2019062903 A1 WO2019062903 A1 WO 2019062903A1 CN 2018108613 W CN2018108613 W CN 2018108613W WO 2019062903 A1 WO2019062903 A1 WO 2019062903A1
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WO
WIPO (PCT)
Prior art keywords
phase
line
stator
star
neutral
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Application number
PCT/CN2018/108613
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English (en)
French (fr)
Inventor
鲁浩
陈园辉
游斌
Original Assignee
比亚迪股份有限公司
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Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Publication of WO2019062903A1 publication Critical patent/WO2019062903A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto

Definitions

  • the present disclosure relates to the field of electrical machinery, and more particularly to a stator assembly and a motor and vehicle therewith.
  • a star point neutral line connection method is disclosed, and the star point neutral line connection mode has a complicated structure, takes up a large space, and needs to increase an insulating material to ensure electrical safety.
  • neutral line connection method is disclosed in the related art, the neutral line having a UV connection line connecting the neutral point connection portion of the U-phase winding and the neutral point connection portion of the V-phase winding and the V-phase winding A VW connection line in which the neutral point connection portion is connected to the neutral point connection portion of the W-phase winding.
  • the neutral line in the above technology is that two connecting portions are connected by two U-shaped wires, which will result in a thicker intermediate welding portion, a large occupied space, and it is difficult to ensure the welding performance.
  • the present disclosure is intended to address at least one of the technical problems existing in the prior art. To this end, the present disclosure proposes a stator assembly in which the star point line and the neutral line are simply connected and occupy less space.
  • a second aspect of the present disclosure is to provide a motor having the above stator assembly.
  • a third aspect of the present disclosure is to propose a vehicle having the above electric machine.
  • a stator assembly includes: a cylindrical stator core having a plurality of stator slots spaced apart in a circumferential direction of the stator core; a stator winding including a plurality of stator windings a conductor segment, each of the conductor segments including an in-slot portion disposed in a stator slot of the stator core, a first end and a second end disposed outside the stator core, the inner portion of the slot being connected Between the first end and the second end, the second ends of the plurality of conductor segments form a soldering end, and a star point of each phase of the stator winding is located on the soldering end, the stator winding
  • the number of winding parallel branches is multiple; the neutral line circumferentially surrounds the welding end of the stator winding, and the star point line of each phase is separately connected to the neutral line.
  • the neutral line is composed of two lines of U-shaped lines respectively.
  • the connection points of the dotted lines are connected two by two, thereby simplifying the connection structure between the star point line and the neutral line, reducing the welding position, reducing the axial and radial space of the stator assembly occupied thereby, and compacting the structure of the motor.
  • the space occupied by the shell and the end cap is minimized to meet the requirements of miniaturization of the motor.
  • FIG. 1 is a schematic view of a stator assembly in which a line end of a star point line extends upward in accordance with an embodiment of the present disclosure
  • FIG. 2 is a schematic view of a stator assembly in which a wire end of a star point line is bent outward according to an embodiment of the present disclosure
  • Figure 3 is a schematic view showing the star point line and the neutral line shown in Figure 2;
  • FIG. 4 is a schematic illustration of a stator assembly in which a neutral line has an antennae, in accordance with an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of a star point line and a neutral line connection of a stator assembly according to an embodiment of the present disclosure, wherein the motor is three-phase and each phase is one way, and the neutral line is an antenna type;
  • FIG. 6 is a schematic view of a stator assembly in which the antennae of the neutral line are in a straight line, in accordance with an embodiment of the present disclosure
  • FIG. 7 is a schematic view of a stator assembly in which a neutral line is connected to a star point line through a U-shaped connection block, in accordance with an embodiment of the present disclosure
  • Figure 8 is an enlarged view of the star point line, the connecting block and the neutral line connection shown in Figure 7;
  • FIG. 9 is a schematic view of a stator assembly in which a neutral line and a star point line are connected by a block-shaped connecting block in accordance with an embodiment of the present disclosure
  • FIG. 10 is a schematic diagram of a stator assembly in which two star-point lines in each phase are combined and then connected to a neutral line through a connection block in accordance with an embodiment of the present disclosure
  • Figure 11 is an enlarged view of the star point line, the connecting block and the neutral line connection shown in Figure 10;
  • FIG. 12 is a schematic view of a stator core in a stator assembly in accordance with an embodiment of the present disclosure
  • FIG. 13 is a schematic illustration of a U-shaped conductor segment in a stator assembly in accordance with an embodiment of the present disclosure
  • FIGS. 14a-14d are schematic illustrations of first to fourth U-shaped conductor segments employed in winding a stator assembly in accordance with an embodiment of the present disclosure
  • FIG. 15 is a schematic view of a stator assembly as an initial arrangement, with an 8-pole 48-slot 3 phase as an example, in accordance with an embodiment of the present disclosure
  • Figure 16 is a schematic view showing the winding mode of the stator assembly of Figure 15, wherein the U-phase 1 road is taken as an example;
  • Figure 17 is a final stator assembly of the stator assembly of Figure 15 after being machined to form a 2-way connection;
  • Figure 18 is a final stator assembly of the stator assembly of Figure 15 after being processed to form a 1-way connection;
  • FIG. 19 is a schematic view of a motor in accordance with an embodiment of the present disclosure.
  • 20 is a schematic view of a vehicle in accordance with an embodiment of the present disclosure.
  • Connecting block 4 receiving space 401, inner leg 41, outer leg 42, U-shaped bottom wall 43,
  • connection In the description of the present disclosure, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • Connected, or integrally connected can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • the specific meaning of the above terms in the present disclosure can be understood in a specific manner by those skilled in the art.
  • a stator assembly 100 in accordance with an embodiment of the present disclosure is described below with reference to FIGS.
  • the m-phase motor is used as a three-phase motor as an example.
  • the m-phase motor is a technical solution of other phase motors after reading the following technical solutions, and therefore will not be described here.
  • each phase winding of the stator winding has two ends, one end of which is a lead line and the other end of which is a star point line.
  • a stator assembly 100 of an embodiment of the present disclosure includes a stator core 1, a stator winding 2, and a neutral wire 3.
  • the stator core is cylindrical, and the stator core 1 has a plurality of stator slots; the stator slots are formed on the inner peripheral wall of the stator core 1 and are axially aligned (for example, as shown in FIG. 1) The direction) penetrates the stator core 1, and a plurality of stator slots are spaced apart in the circumferential direction of the stator core 1, and the depth direction of the stator slots coincides with the radial direction of the stator core.
  • Each stator slot 11 has a plurality of slot layers therein. Specifically, after the stator windings are inserted into the stator slots 11, the stator slots have a plurality of layers formed by stator windings.
  • the slot layers include The respective layers a, b, c, d, e, and f are arranged in each of the stator slots 11 in the radial direction of the stator core 1 in the innermost layer, and in the outermost layer, in the outer layer.
  • Floor The respective layers a, b, c, d, e, and f are arranged in each of the stator slots 11 in the radial direction of the stator core 1 in the innermost layer, and in the outermost layer, in the outer layer.
  • the rotor of the three-phase machine includes eight poles, and correspondingly, the total number of stator slots disposed on the stator core is 48.
  • stator winding 2 comprising a plurality of conductor segments 21, each conductor segment 21 comprising an in-slot portion disposed in a stator slot of the stator core, a first end and a second end disposed outside the stator core, The inner portion of the slot is connected between the first end and the second end, the second end of the plurality of conductor segments 21 forms a soldering end 23, and the star-point lines 24 of the phases of the stator winding 2 are all located on the soldering end 23.
  • each conductor segment 21 includes: an in-slot portion (for example, a first in-slot portion 212 and a second in-slot portion 213 described hereinafter) and a bent portion, wherein the inner portion of the groove is disposed in the stator In the groove, the bent portion is connected to the inner portion of the groove, and the end portion of the groove passes through the stator groove, and the end portion thereof (for example, the upper end portion of the inner portion of the groove shown in FIG. 1) extends beyond the stator core 1, and the end portion of the inner portion of the groove is located.
  • One end (for example, the upper end of the inner portion of the groove shown in Fig. 1) forms the welded end 23 of the stator winding 2.
  • the star-point lines of the phases of the stator winding 2 are all located at the welding end 23, and further, the star-point line 24 of each phase of the stator winding 2 is part of the welding end 23.
  • the neutral wire 3 surrounds the welding end 23 of the stator winding 2 in the circumferential direction of the stator core, whereby the distance between the star point line 24 and the neutral line 3 can be reduced, facilitating the neutral line 3 and welding
  • the star point line 24 of the end 23 is connected.
  • each phase star line 24 is connected to the neutral line 3, respectively. In this way, the connection position of each star point line 24 and the neutral line 3 can be made small, and the connection mode is simpler.
  • the number of winding parallel branches of the stator winding is multi-path, and the multi-way star-point lines in each phase are separately connected with the neutral line.
  • stator assembly 100 of the present disclosure is described below.
  • the stator assembly 100 of the present embodiment is used for a three-phase motor
  • the stator winding 2 of the three-phase motor is a three-phase winding: a U-phase winding, a V-phase winding, and a W-phase winding, in each phase winding.
  • the number of parallel branches is 2, that is, 2 channels are connected in parallel.
  • the number of parallel branches of each phase winding can also be 1, 3, 4 or more and so on. In the following, only the number of parallel branches of each phase winding is 2 as an example. Those skilled in the art can clearly understand that the number of parallel branches of each phase winding is 1, 3, 4 or 5 after reading the following technical solutions. Program, so I will not go into details here.
  • each phase winding is a lead line 25 and the other end is a star point line 24, that is, the stator winding 2 has a total of six lead lines 25 And six star point lines 24, the lead line 25 is used for electrical connection with an external circuit, and the star point lines are connected together to lead the center line.
  • the six lead wires 25 of the three-phase winding are respectively: a U-phase one-way lead-out line 25a, a U-phase two-way lead-out line 25b, a V-phase one-way lead-out line 25c, and a V-phase two-way lead-out line 25d,
  • the six star-point lines 24 of the three-phase winding are: U phase one star point line 24a, U phase two way star point line 24b, V phase one way star point line 24c, V phase two way star point line 24d, W phase one way star Dot line 24e, W phase two way star point line 24f.
  • star point lines 24 are respectively connected to the neutral line 3, that is, the star point lines 24 of each of each phase are respectively connected to the neutral line 3.
  • the neutral line has a UV connection line connecting the neutral point connection portion of the U-phase winding and the neutral point connection portion of the V-phase winding, and a neutral point connection portion and a W-phase winding of the V-phase winding.
  • the VW connection line connected by the point connection portion, the neutral line in the above technology is that the two connection parts are respectively connected by two U-shaped lines, which causes the intermediate welding portion to be thick and takes up a large space, and Welding performance is difficult to guarantee.
  • the axial and radial space of the stator assembly 100 occupied by the connection portion of the neutral line 3 and the star point line 24 can be reduced, making the structure more compact.
  • the connection method is simple, which is convenient for mass production.
  • the neutral line 3 is integrally formed, and the star point lines 24 of the respective phases are respectively connected to the neutral line 3, so that the neutral line in the related art is realized by the two lines U.
  • the shape lines respectively connect the connection points of the three star point lines to each other, thereby simplifying the connection structure of the star point line 24 and the neutral line 3, reducing the welded portion, and reducing the axial and diameter of the occupied stator assembly 100.
  • the structure is compact, so that the space occupied by the casing and the end cover of the motor is minimized to meet the requirements of miniaturization of the motor.
  • the number of paths of the winding parallel branches of the stator windings is the same as the number of neutral lines.
  • the star point line includes a U phase 1 way star point line, a U phase 2 way star point line, a V phase 1 way star point line, a V phase 2 way star point line, and a W phase 1 a road star point line and a W phase 2 road star point line;
  • the U phase 1 way star point line, the V phase 1 way star point line, and the W phase 1 way star point line are connected by a first neutral line;
  • the U phase The 2-way star-point line, the V-phase 2-way star-point line, and the W-phase 2-way star-point line are connected by a second neutral line.
  • the number of branches of the stator windings of the present embodiment connected in parallel is 2, and the number of neutral lines is also 2.
  • the conductor segments 21 are non-circular in cross section.
  • the cross section of the conductor segment 21 is rectangular in shape.
  • the cross section of the conductor segment 21 perpendicular to its longitudinal direction is rectangular, whereby the groove fullness of the coil in the stator slot can be increased, that is, by setting the cross section of the conductor segment 21 to a rectangular shape, the stator of the same volume Within the slot, more conductor segments 21 can be placed, thereby making the arrangement of the plurality of conductor segments 21 within the stator slots more compact.
  • the cross section of the conductor segment 21 can also be other shapes such as a trapezoid or the like.
  • the conductor segment 21 can be a U-shaped conductor segment including a first in-slot portion and a second in-slot portion disposed in the stator slot, the first end of the conductor segment 21 being connected a U-shaped bent portion 211 at one end of the first groove and one end of the second groove portion; a U-shaped bent portion 211 of the plurality of U-shaped conductor segments forms a hair-issuing end of the stator winding, and the first groove portion and the second portion The other end of the inner portion of the slot extends to form a welded end of the stator winding.
  • the U-shaped conductor segments 21 each include a U-shaped bent portion 211, a first in-slot portion 212, and a second in-slot portion 213, wherein the first in-slot portion 212 and the second in-slot portion
  • the portion 213 is disposed in the stator slot, and the first in-slot portion 212 and the second in-slot portion 213 are respectively coupled to the U-shaped bent portion 211, and the first in-slot portion 212 and the second in-slot portion 213 pass through the stator slot The rear end thereof is beyond the stator core 1.
  • FIG. 1 As shown in FIG.
  • the lower end of the first in-slot portion 212 and the lower end of the second in-slot portion 213 are both connected to the U-shaped bent portion 211, and the upper end of the first in-slot portion 212 and the second in-slot portion 213 are The upper end passes through the stator slots and protrudes from the axial end of the stator core 1 (for example, the upper end of the stator core 1 shown in Fig. 1) to facilitate connection of the plurality of conductor segments 21.
  • one end of the U-shaped bent portion 211 of the plurality of conductor segments 21 is the card-issuing end 22 of the stator winding 2, and one end of the first in-slot portion 212 and the second in-slot portion 213 extends to form a welding called the stator winding 2.
  • End 23 in the present disclosure, for clarity of description, it is assumed that the end of the soldering end 23 in the figure is the upper end, and the end of the card-issuing end 22 is the lower end.
  • the star-point lines 24 of the phases of the stator windings 2 are directly connected by a neutral line 3. That is to say, the star-point lines 24 are all directly connected to the neutral line 3, and the plurality of star-point lines 24 are connected together by the connection with the neutral line 3, instead of passing through the intermediate transition joints (for example, as described below).
  • the connection block 4) is indirectly connected to the neutral line 3, in short, all the star point lines 24 in the stator winding 2 are directly connected together by the neutral line 3. Thereby, the connection is convenient, simple and quick. For example, each of the star-point lines 24 in each of the stator windings 2 is directly soldered to the neutral line 3, respectively.
  • the multi-channel star points in each phase can also be connected and connected to the neutral line.
  • the multiple dotted lines in each phase can be directly welded or welded through the connecting strips.
  • the line ends of the multi-way star point lines in each phase extend vertically upward, and the line ends of the multi-way star point lines in each phase are welded and connected, and then welded to the neutral line.
  • each phase star line 24 of the stator winding 2 is in surface contact with the neutral line 3 and is fixed by soldering.
  • connection efficiency and connection reliability can be improved.
  • the contact between the star point line and the neutral line means that one side surface of the star point line is in contact with one side surface of the neutral line to increase the contact area between the star point line and the neutral line, thereby improving Reliability of welding.
  • the surface of the star-dot line toward the neutral side is in close contact with the surface of the neutral line toward the side of the star-point line and then welded together.
  • the line ends of the star-point lines 24 of the stator windings 2 extend axially outward (eg, in the upward direction shown in FIG. 1) along the stator core and form an axial direction.
  • the protruding portion 241 is connected to the axially protruding portion 241, respectively.
  • the axial projection 241 exceeds the end of the welding end 23 by a predetermined distance greater than or equal to the dimension of the neutral wire 3 in the axial direction of the stator core 1 (for example, the up and down direction described in the drawing).
  • the predetermined distance is larger than the dimension of the neutral wire 3 in the axial direction of the stator core 1.
  • the dimension of the neutral wire 3 in the axial direction of the stator core 1 means the height or size of the neutral wire 3 in the axial direction along the stator core 1.
  • the neutral wire 3 is welded and fixed to the radially outer surface of the axial projection 241. Simplified structure for easy soldering and reduced footprint in the radial direction.
  • the line end of the star point line 24 extends upward and the upper end surface thereof is higher than the upper end surface of the soldering end 23, and the upper end surface of the star point line 24 is The distance between the upper end faces of the welding ends 23 is not less than the height of the neutral wire 3 in the up and down direction.
  • the outermost line and the neutral line 3 on the welded end 23 can be along the stator core 1. Axial spacing to avoid interference.
  • the neutral wire 3 can be welded to the end of the line end of the star point line 24, and can also be connected to the middle portion of the line end, which is not much different for the electrical connection effect.
  • phase lead wires 25 of the stator windings are located at the outermost layer in the radial direction of the stator windings.
  • each phase star line 24 of the stator winding is located in the radially outermost outer layer of the stator winding, that is, the star point line 24 is located in the secondary outer layer of the stator winding 2 in the radial direction of the stator core 1.
  • the lead-out position of the star-point line and the lead-out position of the lead-out line depend on the winding manner of the stator winding.
  • the specific winding method adopted by the stator assembly of the present embodiment will be specifically described below.
  • the respective star-point lines are located in the stator winding.
  • the secondary outer layer, each phase lead line is located at the outermost layer of the stator winding.
  • the star-point lines of each phase can be located at the outermost layer of the stator winding.
  • the line ends of the respective star-shaped dotted lines 24 of the stator winding 2 may extend outward in the radial direction of the stator core 1 and be bent at a predetermined angle to form a radial direction.
  • the protruding portion 242 is connected to the radial protrusion 242, respectively.
  • each phase when each phase includes a plurality of star-point lines, the line ends of the plurality of star-point lines 24 in each phase may extend outward in the radial direction of the stator core 1 and bend a predetermined angle and after welding, Then solder with the neutral wire 3. Thereby, it is convenient for the neutral wire 3 to avoid the outermost line on the welding end 23 in the radial direction of the stator core 1 to avoid interference.
  • the radial protrusion 242 exceeds a predetermined distance of the outermost layer of the winding of the welding end, and the predetermined distance is greater than or equal to the dimension of the neutral line in the radial direction of the stator core.
  • the predetermined distance is greater than the dimension of the neutral wire in the radial direction of the stator core.
  • the dimension of the neutral wire in the radial direction of the stator core means the thickness dimension of the neutral wire in the radial direction of the stator core.
  • the neutral line is welded and fixed to the radially outer surface of the radial protrusion 242.
  • the structure is simplified, the welding is facilitated, and the space in the axial direction is reduced.
  • the angle of the star-point line 24 of each phase of the stator winding is outwardly extended and bent at an angle of 60 degrees to 150 degrees. Further, the angle at which the star-point lines 24 of the stator windings are bent outward is 90 degrees.
  • the neutral line 3 may be formed in a curved line segment shape.
  • the curved line-shaped neutral line 3 may be substantially parallel to the circumferential direction of the stator core 1 to facilitate the connection of the neutral line 3 with a plurality of star-point lines 24 circumferentially spaced along the stator core 1.
  • the neutral line has a circular or rectangular cross section, and the cross section of the neutral line 3 perpendicular to its length may be circular; the cross section of the neutral line 3 perpendicular to its length may also be rectangular. ,As shown in Figure 1.
  • the present disclosure is not limited thereto, and the cross section of the neutral line 3 perpendicular to the longitudinal direction thereof may also be other shapes such as an oblate shape, a polygonal shape, or the like.
  • the neutral line 3 may include an arcuate connector 31 and a plurality of antennas 32 that are respectively connected to the respective star-point lines 24 of the stator windings.
  • a shaped connector connects the plurality of antennas.
  • the curved connector 31 has a gap between the radial direction and the radially outermost winding on the welding end 23. Thereby, the arcuate connecting member 31 can be further prevented from interfering with the radially outermost winding on the welding end 23.
  • the neutral line 3 may include a plurality of antennas 32 corresponding to the star point line 24 one by one, so that each antenna angle 32 is correspondingly connected to one star point line 24.
  • the winding coil has a six-way star point line 24, and the neutral line 3 for the stator assembly 100 has six antenna angles 32, as shown in the figure. 4 is shown.
  • the winding coil has three star-point lines 24, and at this time, three antennas 32 may be provided on the neutral line for the stator assembly 100, as shown in the figure. 5 is shown.
  • each of the antennas 32 may include a first connecting section 321, a second connecting section 322 and a curved section 323.
  • the curved section 323 is connected between the first connecting section 321 and the second connecting section 322.
  • the connecting section 321 is connected to the curved connecting piece 31, and the second connecting section 322 is welded to the line end of the star point line 24.
  • first connecting section 321 and the second connecting section 322 are smoothly transitioned through the curved section 323.
  • the antenna 32 extends from the upper surface of the arcuate connector 31, and both the first connecting segment 321 and the second connecting segment 322 extend upward. That is, the first connecting section 321 is connected to the upper surface of the curved connecting member 31 and extends upward, the curved section 323 is connected to the upper end of the first connecting section 321, and the lower end of the second connecting section 322 is connected to the curved section 323.
  • first connecting portion 321 of the antenna 32 may also extend inwardly from the radially inner surface of the curved connecting member 31, and the second connecting portion 322 extends upward and outward (upward) along the axial direction of the stator core 1.
  • the extended star point line 24 is welded.
  • the first connecting section 321 is coupled to the inner surface of the curved connecting member 31 and extends radially inward
  • the second connecting section 322 extends vertically upward
  • the curved section 323 is connected to the horizontal first connecting section 321 and the vertical
  • the antenna 32 has an L shape.
  • the antenna angle 32 may also be formed in a straight line segment shape, and the antenna angle 32 extends inwardly from the radially inner surface of the curved connector 31, and the antenna angle 32 and the star point line 24 are shown. Wire end welding. Further, the antenna 32 can be soldered to the end of the star point line 24 that is bent outward.
  • the neutral wire 3 has the antenna angle 32
  • at least a part of the antenna angle 32 extends radially inward, so that it is advantageous to weld inwardly with the wire end of the star point line 24 by using the antenna angle 32.
  • the curved connector 31 is spaced from the outermost winding of the solder end 23 to avoid interference.
  • the neutral line 3 has the antenna angle 32
  • after the antenna angle 32 on the neutral line 3 is connected with the star point line 24 there is a avoidance space 5 between the adjacent two corresponding antenna angles 32, and the avoidance space 5 is adapted.
  • the outermost layer of the stator windings between the adjacent two-phase star-point lines 24 is accommodated.
  • an indirect connection may also be employed between the neutral line 3 and the star point line 24, specifically, as shown in FIGS. 7-9, the star point line 24 and the neutral line of the stator winding 2 3 indirectly connected by at least one connection block 4.
  • the neutral line 3 and the star point line 24 and the neutral line of the stator winding 2 3 indirectly connected by at least one connection block 4.
  • each phase of the star line and the neutral line are indirectly connected by at least one connection block.
  • connection block 4 may include a plurality of, and the plurality of connection blocks 4 are connected in one-to-one correspondence between the star point line 24 and the neutral line 3.
  • the connecting block may include a plurality of one-to-one corresponding to the multi-phase winding, and the plurality of connecting blocks are connected in one-to-one correspondence with the merging and connecting star-point lines in each phase .
  • connection block may also include a plurality of and respectively connected in one-to-one correspondence with each of the star-point lines of each phase.
  • the star-point line 24 is in surface contact with the connecting block 4 and is fixed by welding
  • the neutral wire 3 is in surface contact with the connecting block 4 and is fixed by welding.
  • connection block 4 will be further described below in conjunction with Figures 7-9.
  • connection block 4 the opposite surfaces of the connection block 4 are connected to the star point line 24 and the neutral line 3, respectively.
  • the structure can be simplified, the implementation is easy, and the space occupied is relatively small.
  • the connecting block 4, and the neutral line 3 are opposed in the radial inner and outer directions of the stator core 1, the radial inner and outer surfaces of the connecting block 4 are respectively connected to the star point line 24 and the neutral line 3, respectively.
  • the connecting block 4, and the neutral line 3 are vertically opposed in the axial direction of the stator core 1, the upper surface and the lower surface of the connecting block 4 are connected to the star point line 24 and the neutral line 3, respectively.
  • the opposite faces of the connecting block 4 are parallel.
  • the line ends of the star-point lines of the stator windings 2 extend in the axial direction of the stator core 1, and the radial inner surface of each of the connecting blocks 4 and the radial direction of the line ends of the star-point lines 24
  • the outer surface is welded, and the radially outer surface of the connecting block 4 is welded to the neutral wire 3.
  • each phase when each phase includes multiple stellar dotted lines, the radially inner surface of each connecting block may be opposite to the radially outer surface of the line end of any of the merging star dotted lines in each phase Welding, the radially outer surface of the connecting block 4 is welded to the neutral wire 3.
  • each of the connecting blocks may be welded to the radially outer surface of the wire end of each of the star-point lines, and the radially outer surface of the connecting block 4 is welded to the neutral wire 3.
  • the line ends of the respective star-shaped dotted lines 24 of the stator winding 2 may extend outward in the radial direction of the stator core 1 and are bent at a predetermined angle to form a radial protrusion, and the connecting blocks are respectively protruded from the radial direction.
  • the departments are connected separately.
  • the height of the connecting block is not higher than the height of the line end of the star point line.
  • the upper end surface of the connecting block is not higher than the upper end surface of the line end of the star point line.
  • the distance of the connecting block 4 is less than or equal to the distance of the neutral line 3.
  • the distance of the connecting block in the axial direction of the stator core refers to the height or size of the connecting block along the axial direction of the stator core
  • the distance of the neutral line refers to the height of the neutral line in the axial direction of the stator core.
  • size the connecting block 4 does not exceed both ends of the neutral wire 3 in the axial direction of the stator core 1 at both ends in the axial direction of the stator core 1.
  • the connecting block 4 is formed in a rectangular parallelepiped shape, the cross section of the neutral line 3 and the line end of the star point line 24 are both square, and the radially inner surface and the outer surface of the connecting block 4 are respectively connected to the star point line. 24 and the neutral wire 3 are attached and welded, wherein the upper surface of the connecting block 4 is flush with the upper surface of the line end of the star point line 24 and the upper surface of the neutral line 3, and the lower surface and the neutral line of the connecting block 4 The lower surface of 3 is flush.
  • the cross-sectional area of the connecting block 4 connected to the star-point line of each path in each phase is greater than or equal to the cross-sectional area of the star-point line 24 of each path in each phase. with.
  • the cross-sectional area of the connecting block 4 in the radial direction is not less than the cross-sectional area of the road star point line 24; when there are two parallel branches in one phase winding, the connecting block 4 The cross-sectional area in the radial direction is not less than the sum of the cross-sectional areas of the two-way star-point line 24 in the phase; when there are three-way parallel branches in the one-phase winding, the cross-sectional area of the connecting block 4 in the radial direction is not less than The sum of the cross-sectional areas of the three-way star-point line 24 in the phase to meet the electrical connection requirements between the connection block and the star-point line.
  • the magnitude of the resistance of the conductor is inversely proportional to the cross-sectional area of the conductor. Therefore, the cross-sectional area of the connecting block 4 is greater than or equal to the horizontal of the star point line 24 of each channel in each phase perpendicular to the length direction thereof.
  • the sum of the cross-sectional areas, the resistance of the unit length of the connecting block 4 is less than or equal to the resistance of 24 points of the star point line of each channel in each phase, so the heat generation per unit length of the connecting block 4 is less than or equal to the star point of each road in each phase.
  • the heat generation of the line 24 unit length avoids the problem of local overheating of the connection block 4.
  • connection block 4 may have an accommodation space 401 through which the neutral wire 3 passes and is accommodated, whereby space can be reduced and, in the motor During the operation, different degrees of vibration will occur, and the vibration will easily cause the welded portion of the neutral line and the star point line to fall off. For this reason, the neutral line 3 passes through and is accommodated in the accommodating space 401, so that the neutral line is The connection of the accommodation space is more stable, and it is not easy to cause the neutral line to fall off.
  • the accommodation space 401 may be formed in an arc shape, a U shape or a polygon shape.
  • the line end of the star point line 24 extends in the axial direction of the stator core (for example, the up and down direction shown in FIG. 8); the connection block 4 is configured in a U shape, and the connection block 4
  • the inner leg 41 and the outer leg 42 may be included, wherein the inner leg 41 has an elongated shape extending vertically in the axial direction of the stator core 1 away from the stator core 1, and the outer leg 42 is also An elongated strip extending vertically in the axial direction of the stator core 1 away from the stator core 1, the inner leg 41 and the outer leg 42 are spaced apart in the radial direction of the stator core 1, and are along the The inner leg 41 is located inside the outer leg 42 in the radial direction of the stator core.
  • the inner leg 41 is welded to the line end of the star point line 24, and the neutral line 3 is welded between the inner leg 41 and the outer leg 42.
  • each phase when each phase includes a plurality of star-point lines, the inner legs can be welded with the line ends of any one of the merged multi-point star-point lines in each phase, neutral The wire is welded between the inner leg and the outer leg.
  • the inner leg may be welded to the wire end of each star point line of each phase, and the neutral wire is welded between the inner leg and the outer leg.
  • the neutral wire 3 may be welded to the radially inner surface of the outer leg 42 and the neutral wire 3 is spaced apart from the U-shaped bottom wall 43 attached to the bottom of the outer leg 42 and the inner leg 41.
  • the neutral wire 3 may also be welded to the U-shaped bottom wall 43 connected to the bottom of the outer leg 42 and the inner leg 41, that is, the neutral wire 3 may also be welded to the U-shaped bottom.
  • the U-shaped bottom wall 43 is joined to the bottom of the outer leg 42 and the inner leg 41.
  • the top of the accommodating space 401 is opened so that the neutral wire 3 can be inserted from the top into the accommodating space 401 for assembly.
  • the top surface of the neutral wire 3 is flush with the top surface of the connecting block 4 to reduce the space occupied.
  • the neutral line 3 is a curved line segment having a rectangular cross section, and the neutral line 3 of the curved line segment is concentric with the stator core 1 such that the neutral line 3 can be spaced more circumferentially
  • the distance between the star point lines 24 in the radial direction is uniform, so that the neutral line 3 is connected to the star point lines 24.
  • the width of the neutral wire 3 in the radial direction of the stator core 1 is smaller than the height of the neutral wire 3 in the axial direction of the stator core 1, whereby the occupied space in the radial direction can be reduced, and the connection is facilitated.
  • a relief space 5 is defined between the neutral line 3 and the welding end 23, the avoidance space 5 being adapted to accommodate the two adjacent phases.
  • the neutral line 3 has a plurality of inwardly extending antennas 32, each of which is soldered to the corresponding star point line 24, and the antenna 32 on the neutral line 3 is connected to the star point line 24.
  • the span of the neutral line in the circumferential direction of the stator core is greater than or equal to the maximum span of the respective star point lines in the circumferential direction.
  • the length of the neutral line along the circumferential direction of the stator core is not less than the distance between the two star point lines farthest from the three-phase star point line along the circumferential direction of the stator core, that is, neutral.
  • the span of the line in the circumferential direction is greater than or equal to the span of the three-phase star point line in the circumferential direction, so that the neutral line can be connected to the three-phase star point line.
  • the cross-sectional area of the neutral line is greater than or equal to the cross-sectional area of the star point line of each phase.
  • the cross-sectional area of the neutral line perpendicular to its length direction is greater than or equal to the cross-sectional area of the star-point line perpendicular to its length direction.
  • the cross-sectional area of the neutral line 3 in the radial direction of the stator core is greater than or equal to the sum of the cross-sectional areas of the respective star-point lines 24 in each phase.
  • the number of winding parallel branches of the stator winding 2 is one
  • the cross-sectional area of the neutral line 3 is greater than or equal to the cross-sectional area of the star point line 24;
  • the number of windings of the stator winding 2 is two.
  • the cross-sectional area of the neutral line 3 is greater than or equal to the sum of the cross-sectional areas of the two paths.
  • the magnitude of the resistance of the conductor is inversely proportional to the cross-sectional area of the conductor. Therefore, the cross-sectional area of the neutral line 3 is greater than or equal to the length of the star line 24 of each channel in each phase being perpendicular to the length direction thereof.
  • the sum of the cross-sectional areas, the resistance of the neutral line 3 unit length is less than or equal to the resistance of 24 units of the star point line of each channel in each phase, so the calorific value per unit length of the neutral line 3 is less than or equal to each in each phase.
  • the star's point line has a heat output of 24 units, which avoids the problem of local overheating of the neutral line 3.
  • the neutral line 3 may be constructed as a rectangular line having a rectangular cross section. Further, the cross-sectional area is the same in the extending direction of the neutral line 3.
  • the neutral line 3 may be a press-formed copper row.
  • the neutral line 3 can also be a copper wire having a circular cross section.
  • the neutral line 3 may also be a scattered line.
  • the material of the neutral wire 3 may conform to the material of the conductor segment 21 to improve the reliability of the connection between the neutral wire 3 and the star point line 24.
  • the multiplexed star-point lines 24 in each phase are joined and then connected to the neutral line 3.
  • the multiple star-point lines 24 in each phase may be welded directly or through a connecting strip.
  • the number of parallel branches of each phase winding is 2, and in the process of connecting the neutral line 3, the two star point lines 24 in the same phase can be welded together first, and then one of the star points is added.
  • the wire 24 is welded to the connecting block 4, which is then welded to the neutral wire 3.
  • the number of winding parallel branches of the stator winding 2 is at least one, and each of the star-point lines 24 of each phase is separately connected to the neutral line 3, for example, for example.
  • the number of winding parallel branches of the stator winding 2 is two, the stator winding is provided with two neutral lines 3, and each neutral line 3 is connected with each phase of each star point line 24, the two neutrals
  • the wires 3 are arranged in parallel in the axial direction of the stator windings to reduce the space in the radial direction of the stator windings.
  • a motor 1000 in accordance with an embodiment of the second aspect of the present disclosure includes a stator assembly 100 in accordance with an embodiment of the first aspect of the present disclosure.
  • the motor 1000 according to an embodiment of the present disclosure improves the overall performance of the motor 1000 by providing the stator assembly according to the embodiment of the first aspect of the present disclosure.
  • a vehicle 10000 according to a third aspect of the present disclosure includes a motor 1000 according to an embodiment of the second aspect of the invention.
  • the vehicle 10000 according to an embodiment of the present disclosure improves the overall performance of the vehicle 10000 by providing the motor 1000 according to the embodiment of the second aspect of the present disclosure.
  • each stator slot 11 The six groove layers include layers a, b, c, d, e, and f arranged in sequence, in each stator slot.
  • the innermost layer in the radial direction of the stator core 1 is the a layer
  • the outermost layer is the f layer.
  • the star point line and the lead line of each U phase are different from each other by 6 stator slots, and the two channels of each phase are different in the circumferential direction by one stator slot; U phase, V phase The adjacent star-point lines in the W phase are different from each other in the circumferential direction by four stator slots; the adjacent corresponding lead lines in the U phase, the V phase, and the W phase are different in the circumferential direction by four stator slots.
  • the U-phase 1 way lead line U1A and the U-phase 2 way lead line U2A differ by 1 stator slot, and the V-phase 1 way lead line V1A and V phase
  • the two-way lead-out line V2A differs by one stator slot; the W-phase one-way lead-out line W1A and the W-phase two-way lead-out line W2A differ by one stator slot.
  • the U-phase 1 way lead line U1A and the U-phase 1 way star point line U1B are different from each other by 6 stator slots, and the U-phase 2 way lead lines U2A and U-phase 2 way
  • the star-point line U2B differs by 6 stator slots; likewise, the two-way lead-out line V1A and the star-point line V1B, the lead-out line V2A, and the star-point line V2B are also different from each other by 6 stator slots; There are also six stator slots between the two-way lead line W1A and the star point line W1B, the lead line W2A, and the star point line W2B.
  • adjacent star-point lines in the U phase, the V phase, and the W phase are different in the circumferential direction by four stator slots.
  • the first path is taken as an example, and the U-phase 1 road star line U1B, The star-point line V1B of the V-phase 1 and the star-point line W1B of the W-phase 1 are sequentially different from each other by 4 slots in the circumferential direction.
  • U1B is taken out from the 07-slot e-layer
  • V1B is taken from the 03-slot e-layer.
  • W1B is taken from the 47-slot e layer.
  • U2B, V2B, and W2B of the second path are taken out from the 08-slot e-layer, the 04-slot e-layer, and the 48-slot e-layer, respectively, with 4 stator slots in between.
  • the U-phase 1 lead line U1A, the V-phase 1 way lead line V1A, and the W-phase 1 way lead line W1A are sequentially different by four slots in the circumferential direction, for example, in FIG.
  • U1A is introduced from the 01-slot f layer
  • V1A is introduced from the 45-slot f-layer
  • W1A is introduced from the 41-slot f-layer
  • the U2A, V2A, and W2A of the second path are introduced from the 02-slot f-layer, the 46-slot f-layer, and the 42-slot-f layer, respectively, with 4 stator slots in between.
  • the winding coil structure can be wound by the following winding method. As shown in FIG. 16 and FIG. 17, taking the U-phase first road as an example, the winding line is as follows:
  • the winding circuit of the U-phase second road is different from the U-phase first road by one stator slot in the circumferential direction.
  • the adjacent star-point lines in the U phase, the V phase, and the W phase are different in the circumferential direction by 4 stator slots;
  • the adjacent adjacent lead lines of the U phase, the V phase, and the W phase are different in the circumferential direction by four stator slots.
  • the lead wire U1A is introduced on the welding end into the radially outermost groove layer 1f of the first groove of the initial groove, and is connected to the first groove inner portion of the first U-shaped conductor segment 2001, and the first U-shaped conductor segment 2001 is in the same layer in the opposite direction.
  • Each of the second U-shaped conductor segments 2002 spans six stator slots, and the second slot portion of each second U-shaped conductor segment 2002 is located in a slot that is forwardly spanned and sequentially connected by a plurality of second U-shaped conductor segments 2002.
  • the layer is radially inward than the groove layer in which the inner portion of the first groove is located until the inner portion of the second groove is located in the radially inner inner groove layer, that is, the radial direction from the 43rd groove through a second U-shaped conductor segment 2002
  • the outermost groove layer 43f spans to the radially outer outer groove layer 1e of the first groove, and passes from the radially outer outer groove layer 1e of the first groove to the groove layer 7d of the seventh groove by the next second U-shaped conductor segment 2002 And so on until reaching the radial sub-inner layer 19b of the 19th slot;
  • Each of the fourth U-shaped conductor segments 2004 spans six stator slots, and each of the fourth U-shaped conductor segments 2004 is located in the slot of the second slot portion of the fourth U-shaped conductor segment 2004.
  • the layer is radially outward from the groove layer in which the inner portion of the first groove is located until the inner portion of the second groove is located in the radially outer outer groove layer, that is, the diameter from the 19th groove through a fourth U-shaped conductor segment 2004
  • the radially inner inner groove layer 13b spanning to the innermost groove layer 19a to the thirteenth groove, and the groove from the radially inner inner groove layer 13b of the thirteenth groove to the seventh groove by the next fourth U-shaped conductor segment 2004 7c, and so on until reaching the radially outer outer layer 43e of the 43rd groove;
  • the above arrangement is repeated using the first U-shaped conductor segment 2001, the second U-shaped conductor segment 2002, the third U-shaped conductor segment 2003, and the fourth U-shaped conductor segment 2004 until the second of the fourth U-shaped conductor segments 2004
  • the inner portion of the groove reaches the adjacent layer of the radially outermost groove layer of the seventh groove of the terminating groove (ie, the secondary outer groove layer 7e) and connects the star point line U1B of the phase, wherein the seventh groove of the terminating groove is in the forward direction
  • a stator assembly for an 8-pole 48-slot 3-phase motor may be optionally machined into a two-way or one-way solution based on its initial stator assembly 100.
  • the first road star lines U1B, V1B, W1B, and the second road star points U2B, V2B, and W2B of the U, V, and W phases are respectively bent outward and passed.
  • the neutral wire 3 is welded and connected, as shown in Fig. 18.
  • the first lead wires U1A, V1A, W1A of the three phases of U, V, W, and the second lead wires U2A, V2A, W2A are welded and fixed by welding terminals. It is then connected to an external controller interface.
  • the U2, V2, and W2A of the U, V, and W phases are stretched and bent, and the first road star line U1B of the three phases of U, V, and W, V1B and W1B are respectively welded and fixed, and the second star point lines U2B, V2B, and W2B are respectively bent outward, and are connected by the neutral wire 3 welding.
  • the first lead wires U1A, V1A, and W1A of the U, V, and W phases are soldered and fixed by soldering terminals, and then connected to an external controller interface.
  • stator winding structure of each phase is different.
  • each phase includes three paths (not shown), wherein the star points of each of the U phases
  • the difference between the line and the lead line is 9 stator slots 11, and the two sides of the U phase are different from each other by one stator slot 11 in the circumferential direction; the two sides of the V phase are different in the circumferential direction by one stator slot 11
  • the two phases of the W phase are different from each other in the circumferential direction by one stator slot 11, and the star-point lines corresponding to the U phase, the V phase, and the W are circumferentially different from each other by six stator slots 11, U phase, V phase, W
  • the corresponding lead wires are different in the circumferential direction by six stator slots 11.
  • the star point line of each phase of each phase is located in the radially outermost layer, and the lead line of each phase of each phase is located in the radial direction.
  • the outer layer of the outer layer is convenient for the introduction of the lead line, the extraction of the star point line, and the structure of the entire coil winding is simple.
  • the stator assembly 100 adopting the above winding method has a soldering point only on the soldering end, and no soldering terminal on the card issuing end, and the soldering process is simple and convenient; the coil type required for winding Less, less equipment required, easy to achieve mass production.
  • the winding method is adopted, so that the flat wire voltage difference between adjacent groove layers in the same groove is smaller than the existing solution, which can effectively reduce the risk of motor insulation breakdown and high reliability; in addition, the number of winding paths can be easily adjusted. .

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

一种定子组件和具有其的电机和车辆，定子组件包括：定子绕组(2)，定子绕组包括多个导体段(21)，多个导体段的所述第二端形成焊接端(23)，定子绕组各相的星点线(24)均位于焊接端(23)，定子绕组(2)的绕组并联支路数为多路；中性线(3)沿周向环绕焊接端，每相每路的星点线(24)均单独与中性线连接。

Description

定子组件和具有其的电机和车辆
相关申请的交叉引用
本公开基于申请号为201710910206.1，申请日为2017年9月29日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本公开作为参考。
技术领域
本公开涉及电机技术领域，尤其涉及一种定子组件和具有其的电机和车辆。
背景技术
在相关技术中公开了星点中性线连接方式，该星点中性线连接方式结构复杂，占用空间大，且需增加绝缘材料保证电气安全。
相关技术中公开了另一种中性线连接方式，该中性线具有将U相绕组的中性点连接部与V相绕组的中性点连接部连接的UV连接线和将V相绕组的中性点连接部与W相绕组的中性点连接部连接的VW连接线。上述技术中的中性线是由两根线U形线分别将三个连接部位两两相连，这样会导致中间焊接部位较厚，占用空间较大，且焊接性能难以保证。
发明内容
本公开旨在至少解决现有技术中存在的技术问题之一。为此，本公开提出一种定子组件，所述定子组件的星点线与中性线连接简单，占用空间少。
本公开第二方面在于提出一种具有上述定子组件的电机。
本公开第三方面在于提出一种具有上述电机的车辆。
根据本公开的定子组件，包括：圆筒形的定子铁芯，所述定子铁芯上具有沿所述定子铁芯的圆周方向间隔排列的多个定子槽；定子绕组，所述定子绕组包括多个导体段，每个所述导体段包括设置在定子铁芯的定子槽中的槽内部分、设置在所述定子铁芯外部的第一端和第二端，所述槽内部分连接在所述第一端和所述第二端之间，多个导体段的所述第二端形成焊接端，所述定子绕组各相的星点线均位于所述焊接端上，所述定子绕组的绕组并联支路数为多路；中性线，所述中性线沿周向环绕所述定子绕组的所述焊接端，每相每路的星点线均单独与所述中性线连接。
根据本公开的定子组件，通过设置中性线，并将各相的星点线分别与中性线相连， 替代现有技术中，中性线是由两根线U形线分别将三个星点线的连接部位两两相连，由此，可以简化星点线与中性线的连接结构，减少焊接部位，减少其占用的定子组件的轴向和径向空间，结构紧凑，使电机的机壳和端盖占用的空间尽量减小，达到电机小型化的要求。
本公开的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本公开的实践了解到。
附图说明
本公开的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本公开实施例的定子组件的示意图，其中星点线的线端向上延伸；
图2是根据本公开实施例的定子组件的示意图，其中星点线的线端向外折弯；
图3是图2中所示的星点线与中性线连接的示意图；
图4是根据本公开实施例的定子组件的示意图，其中中性线具有触角；
图5是根据本公开实施例的定子组件的星点线与中性线连接的示意图，其中电机为三相且每相为一路，中性线为触角式；
图6是根据本公开实施例的定子组件的示意图，其中中性线的触角呈直线；
图7是根据本公开实施例的定子组件的示意图，其中中性线与星点线通过U形连接块连接；
图8是图7中所示的星点线、连接块和中性线连接的放大图；
图9是根据本公开实施例的定子组件的示意图，其中中性线与星点线通过方块状的连接块连接；
图10是根据本公开实施例的定子组件的示意图，其中每相中的两路星点线合并后再通过连接块与中性线连接；
图11是图10中所示的星点线、连接块和中性线连接的放大图；
图12为根据本公开实施例的定子组件中定子铁芯的示意图；
图13为根据本公开实施例的定子组件中U形导体段的示意图；
图14a-图14d是根据本公开实施例的定子组件绕线时采用的第一至第四U形导体段的示意图；
图15为根据本公开实施例的作为初始设置的定子组件的示意图，其中以8极48槽3相为例示出；
图16为图15中的定子组件的绕线方式示意图，其中以U相1路为例示出；
图17为图15中定子组件经过加工后形成2路接线方式的最终定子组件；
图18为图15中定子组件经过加工后形成1路接线方式的最终定子组件；
图19为是根据本公开实施例的电机的示意图；
图20为是根据本公开实施例的车辆的示意图。
附图标记：
定子组件100，
定子铁芯1，
定子绕组2，
导体段21，U形折弯部211，第一槽内部分212，第二槽内部分213，
发卡端22，焊接端23，
星点线24，轴向突出部241，径向突出部242，引出线25，
中性线3，弧形连接件31，触角32，第一连接段321，第二连接段322，弯曲段323，
连接块4，容纳空间401，内支腿41，外支腿42，U形底壁43，
避让空间5，电机1000，车辆10000。
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本公开，而不能理解为对本公开的限制。
在本公开的描述中，需要理解的是，术语“中心”、“长度”、“宽度”、“厚度”、“上”、“下”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本公开的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体 情况理解上述术语在本公开中的具体含义。
下面参考图1-图11描述根据本公开实施例的定子组件100。其中，本公开实施例的定子组件100可以用于m相电机中，且m＝1、2、3……。也就是说，定子组件100可以用于一相电机、两相电机、三相电机等。下面仅以m相电机为三相电机为例进行说明，当然，本领域技术人员在阅读了下面的技术方案后显然可以理解m相电机为其他相电机的技术方案，因此这里不再一一赘述。这里，还需要说明的是，定子绕组的每一相绕组均具有两端，其中一端为引出线，另一端为星点线。
如图1所示，本公开实施例的定子组件100包括定子铁芯1、定子绕组2和中性线3。
具体地，所述定子铁芯为圆筒形，定子铁芯1上具有多个定子槽；定子槽形成于定子铁芯1的内周壁上，并沿轴向(例如图1中所示的上下方向)贯穿定子铁芯1，且多个定子槽沿定子铁芯1的圆周方向间隔布置，所述定子槽的深度方向与定子铁芯的径向方向一致。
每个定子槽11中具有多个槽层，具体地说，定子绕组插入到定子槽11后，定子槽内具有定子绕组形成的多个层，在本发明的一些实施例中，槽层包括依次排列的a、b、c、d、e、f各层，在每个定子槽11中，在定子铁芯1的径向方向上位于最内层的为a层，位于最外层的为f层。
在一个实施例中，三相电机的转子包括八个磁极，相应地，设置在定子铁芯上定子槽的总数目为48。
定子绕组，所述定子绕组2包括多个导体段21，每个导体段21包括设置在定子铁芯的定子槽中的槽内部分、设置在定子铁芯外部的第一端和第二端，槽内部分连接在第一端和第二端之间，多个导体段21的第二端形成焊接端23，定子绕组2各相的星点线24均位于焊接端23上。
如图1所示，每个导体段21包括：槽内部分(例如下文中所述的第一槽内部分212和第二槽内部分213)和折弯部，其中，槽内部分设置在定子槽中，折弯部连接槽内部分，槽内部分穿过定子槽后其端部(例如图1中所示的槽内部分的上端)超出定子铁芯1，槽内部分的端部所在的一端(例如图1中所示的槽内部分的上端)形成定子绕组2的焊接端23。定子绕组2各相的星点线均位于焊接端23，进一地，定子绕组2各相的星点线24是焊接端23的一部分。具体地，中性线3沿定子铁芯的周向环绕定子绕组2的焊接端23，由此，可以减小星点线24与中性线3之间的距离，方便中性线3与焊接端23的星点线24连接。
进一步地，中性线3与各相的星点线24相连。也就是说，每相星点线24分别与中 性线3相连。这样，可以使每个星点线24与中性线3的连接位置占用空间小，且连接方式更为简单。
其中，定子绕组的绕组并联支路数为多路，每相中的多路星点线单独与中性线连接。
下面描述本公开定子组件100的一个具体实施例。
如图1和图2所示，本实施例的定子组件100用于三相电机，三相电机的定子绕组2为三相绕组：U相绕组、V相绕组和W相绕组，每相绕组中的并联支路数为2，即2路并联。当然，每相绕组的并联支路数也可以为1、3、4或5以上等等。下面仅以每相绕组并联支路数为2为例进行说明，本领域技术人员在阅读了下面的技术方案后显然可以理解每相绕组的并联支路数为1、3、4或5的技术方案，因此这里不再一一赘述。
当三相绕组采用Y形连接(即星形连接)时，每一相绕组中的每一路的一端为引出线25且另一端为星点线24，即：定子绕组2共具有六条引出线25和六条星点线24，引出线25用于与外部电路电连接，星点线通过连接在一起引出中线。
具体地，如图2所示，三相绕组的六条引出线25分别为：U相一路引出线25a、U相二路引出线25b、V相一路引出线25c、V相二路引出线25d、W相一路引出线25e、W相二路引出线25f。三相绕组的六条星点线24分别为：U相一路星点线24a、U相二路星点线24b、V相一路星点线24c、V相二路星点线24d、W相一路星点线24e、W相二路星点线24f。
进一步地，六条星点线24分别与中性线3相连，也就是说，每一相中每一路的星点线24均分别与中性线3相连。
相关技术中，中性线具有将U相绕组的中性点连接部与V相绕组的中性点连接部连接的UV连接线和将V相绕组的中性点连接部与W相绕组的中性点连接部连接的VW连接线，上述技术中的中性线是由两根线U形线分别将三个连接部位两两相连，这样会导致中间焊接部位较厚，占用空间较大，且焊接性能难以保证。由此，在本公开的实施例中，可以减少由于中性线3与星点线24连接部位而占用的定子组件100的轴向及径向的空间，使结构更为紧凑。且连接方式简单，便于批量生产。
根据本公开实施例的定子组件100，通过一体成型的中性线3，并将各相的星点线24分别与中性线3相连，实现相关技术中的中性线是由两根线U形线分别将三个星点线的连接部位两两相连，由此，可以简化星点线24与中性线3的连接结构，减少焊接部位，减少其占用的定子组件100的轴向和径向空间，结构紧凑，使电机的机壳和端盖占用的空间尽量减小，达到电机小型化的要求。
在本公开的一些实施例中，所述定子绕组的绕组并联支路的路数与中性线的数量相同。例如，在一个具体实施例中，所述星点线包括U相1路星点线、U相2路星点线、 V相1路星点线、V相2路星点线、W相1路星点线和W相2路星点线；所述U相1路星点线、V相1路星点线和W相1路星点线通过第一中性线连接；所述U相2路星点线、V相2路星点线、W相2路星点线通过第二中性线连接。有前述可以看出，本实施例的定子绕组的绕组并联的支路路数为2，中性线的数量也为2。
在一些实施例中，导体段21的横截面为非圆形。优选地，导体段21的横截面的形状为矩形。导体段21垂直于其长度方向的横截面为矩形形状，由此，可以提高定子槽内线圈的槽满率，也就是说，通过将导体段21的横截面设置为矩形，在同样容积的定子槽内，可以布置更多的导体段21，从而使定子槽内的多个导体段21布置更为紧凑。当然，导体段21的横截面还可以为其他形状例如梯形等等。
在一些实施例中，导体段21可以为U形导体段，U形导体段包括设置在定子槽中的第一槽内部分和第二槽内部分，所述导体段21的第一端为连接第一槽内部分和第二槽内部分一端的U形折弯部211；多个U形导体段中的U形折弯部211形成定子绕组的发卡端，且第一槽内部分和第二槽内部分的另一端延伸形成定子绕组的焊接端。
如图1所示，所述U形导体段21均包括：U形折弯部211、第一槽内部分212和第二槽内部分213，其中，第一槽内部分212和第二槽内部分213设置在定子槽内，且第一槽内部分212和第二槽内部分213分别与U形折弯部211连接，且第一槽内部分212和第二槽内部分213穿过定子槽后其端部超出定子铁芯1。例如图3所示，第一槽内部分212的下端和第二槽内部分213的下端均与U形折弯部211相连，且第一槽内部分212的上端和第二槽内部分213的上端均穿过定子槽，并伸出定子铁芯1的轴向的端部(例如图1中所示的定子铁芯1的上端)，以方便多个导体段21相连。
其中，多个导体段21中的U形折弯部211所在一端为定子绕组2的发卡端22、且第一槽内部分212和第二槽内部分213一端延伸形成称为定子绕组2的焊接端23，在本公开中，为了描述清楚，假定图中的焊接端23所在一端为上端，发卡端22所在一端为下端。
在本公开的一些实施例中，定子绕组2各相的星点线24通过中性线3直接连接。也就是说，星点线24均直接与中性线3连接，通过与中性线3连接实现将多个星点线24连接在一起，而不是通过中间的过渡连接物(例如下文中所述的连接块4)间接与中性线3连接，简言之，利用中性线3直接将定子绕组2内的所有星点线24连接在一起。由此，连接方便，简单快捷。例如，定子绕组2中每相绕组中的每路星点线24均分别直接与中性线3焊接连接。
另外，每相中的多路星点线也可以合并连接后与中性线连接。具体地，每相中的多路星点线之间可以直接焊接或通过连接条焊接。
例如，每相中多路星点线的线端均竖直向上延伸，且每相中多路星点线的线端焊接连接后，再与中性线焊接。
在一些示例中，定子绕组2的各相星点线24与中性线3面接触且焊接固定。由此，可以提高连接效率和连接可靠性。这里，星点线与中性线面接触是指，星点线的一侧表面与中性线的一侧表面贴合并接触，以增大星点线和中性线之间的接触面积，提高焊接的可靠性。例如，星点线的朝向中性线一侧的表面与中性线的朝向星点线的一侧的表面贴合接触然后焊接连接在一起。
在一些示例中，如图1所示，定子绕组2各相星点线24的线端沿定子铁芯轴向向外(例如沿图1中所示的向上的方向)延伸，并形成轴向突出部241，中性线3与轴向突出部241分别连接。
具体的，轴向突出部241超过焊接端23的端部预定距离，预定距离大于等于中性线3在定子铁芯1轴向(例如图中所述的上下方向)上的尺寸。优选地，预定距离大于中性线3在定子铁芯1轴向上的尺寸。这里，中性线3在定子铁芯1轴向上的尺寸是指，中性线3在沿定子铁芯1轴向方向上的高度或尺寸。
具体的，中性线3与轴向突出部241的径向外表面焊接固定。简化结构，方便焊接，且减少径向上的占用空间。
具体如图1所示，在沿图1中所示的上下方向上，星点线24的线端向上延伸且其上端面高于焊接端23的上端面，且星点线24的上端面与焊接端23的上端面之间的距离不小于中性线3沿上下方向的高度。这样，当星点线24的端部与中性线3沿定子铁芯1的径向内外相对连接时，可以使焊接端23上的最外层线与中性线3沿定子铁芯1的轴向间隔开，避免干涉。
这里，需要说明的是，中性线3可以焊接在星点线24的线端端部，还可以连接在线端的中间部分，对于电连接效果来说，并无太大差别。
如图1所示，定子绕组的各相引出线25位于定子绕组径向上最外层。
如图1所示，定子绕组的各相星点线24位于定子绕组径向上次外层，也就是说，星点线24位于定子绕组2沿定子铁芯1的径向方向的次外层。
这里，需要说明的是，星点线的引出位置以及引出线的引出位置取决于定子绕组的绕线方式。本实施例的定子组件所采用的具体绕线方式将在下文中具体描述，当本公开实施例的定子组件采用下述的绕线方法，最终绕线完成后，各相星点线位于定子绕组的次外层，各相引出线位于定子绕组的最外层。当采用别的绕线方式时，各相星点线可以位于定子绕组的最外层。
在一些示例中，如图2和图3所示，定子绕组2的各相星点线24的线端可以沿定 子铁芯1的径向向外延伸并折弯预设角度，以形成径向突出部242，中性线3与径向突出部242分别连接。由此，方便中性线3沿定子铁芯1的径向避开焊接端23上的最外层线，以避免干涉。
其中，当每相中包括多路星点线时，每相中多路星点线24的线端可以均沿定子铁芯1的径向向外延伸并折弯预设角度并且焊接连接后，再与中性线3焊接。由此，方便中性线3沿定子铁芯1的径向避开焊接端23上的最外层线，以避免干涉。
具体的，径向突出部242超过焊接端的绕组最外层预定距离，预定距离大于等于中性线在定子铁芯径向上的尺寸。优选地，预定距离大于中性线的在定子铁芯径向上的尺寸。这里，中性线在定子铁芯径向上的尺寸是指，中性线在定子铁芯径向方向的厚度尺寸。
具体的，中性线与径向突出部242的径向外表面焊接固定。简化结构，方便焊接，且减少轴向上的占用空间。
具体的，定子绕组各相星点线24向外延伸折弯的角度为60度-150度。更进一步地，定子绕组各相星点线24向外折弯的角度为90度。
下面结合附图对中性线3进行进一步描述。
在一些实施例中，如图1和图3所示，中性线3可以形成为弧形线段形状。此时，弧形线段状的中性线3可以大体平行于定子铁芯1的周向，以方便中性线3与沿定子铁芯1周向间隔的多个星点线24连接。
如图3所示，中性线横截面为圆形或矩形，中性线3垂直于其长度方向的横截面可以为圆形；中性线3垂直于其长度方向的横截面也可以为矩形，如图1所示。当然，本公开不限于此，中性线3垂直于其长度方向的横截面也可以为扁圆形、多边形等其他形状。
如图4和图5所示，在一些实施例，中性线3可以包括：弧形连接件31和多个触角32，多个触角32分别与定子绕组的各相星点线24相连，弧形连接件连接所述多个触角。由此，可以避免弧形连接件31与焊接端23最外层绕组干涉。
进一步地，弧形连接件31在径向上与焊接端23上径向最外层绕组之间具有间隙。由此，可以进一步避免弧形连接件31与焊接端23上径向最外层绕组干涉。
其中，中性线3可以包括与星点线24一一对应的多个触角32，以便于每个触角32对应连接一路星点线24。例如，当电机为3相且每相绕组均包括两个并联支路时，绕组线圈具有六路星点线24，此时用于该定子组件100的中性线3具有6个触角32，如图4所示。当电机为3相且每相绕组仅具有一个并联支路时，绕组线圈具有三个星点线24，此时，用于该定子组件100的中性线上可设有三个触角32，如图5所示。
如图5所示，每个触角32均可以包括第一连接段321、第二连接段322和弯曲段323，弯曲段323连接在第一连接段321和第二连接段322之间，第一连接段321连接至弧形连接件31，第二连接段322与星点线24的线端焊接。
具体地，第一连接段321和第二连接段322通过弯曲段323圆滑过渡。
可选地，如图5所示，触角32从弧形连接件31的上表面延伸出，且第一连接段321和第二连接段322均向上延伸。也就是说，第一连接段321连接在弧形连接件31的上表面上并向上延伸，弯曲段323连接在第一连接段321的上端，第二连接段322的下端与弯曲段323相连。
另外，触角32的第一连接段321也可以从弧形连接件31的径向内表面向内延伸出，第二连接段322向上延伸且与沿定子铁芯1的轴向向外(向上)延伸的星点线24焊接。例如，第一连接段321连接在弧形连接件31的内表面上并沿径向向内延伸，第二连接段322竖直向上延伸，弯曲段323连接在水平的第一连接段321和竖向的第二连接段322之间，此时，触角32呈L形状。
当然，本公开不限于此，如图6所示，触角32也可以形成为直线线段形状，且触角32从弧形连接件31的径向内表面向内延伸出，触角32与星点线24的线端焊接。进一步地，触角32可以与星点线24向外折弯后的线端焊接。
这里，需要说明的是，中性线3具有触角32时，触角32的至少一部分沿径向向内延伸，这样，通过利用触角32向内伸入与星点线24的线端焊接，有利于将弧形连接件31与焊接端23的最外层绕组间隔开，以避免干涉。例如，当中性线3具有触角32时，当中性线3上的触角32与星点线24之间连接后，相邻的两相对应的触角32之间具有避让空间5，避让空间5适于容纳位于相邻两相的星点线24之间的定子绕组最外层。
在本公开的一些实施例中，中性线3与星点线24之间还可以采用间接连接，具体地，如图7-图9所示，定子绕组2的星点线24与中性线3通过至少一个连接块4间接连接。又如图11所示，当每相中包括多路星点线时，每相中合并后的多路星点线与中性线通过至少一个连接块间接连接。
当然，每相每路星点线与中性线通过至少一个连接块间接连接。
参照图8，连接块4可以包括多个，且多个连接块4一一对应地连接在星点线24和中性线3之间。通过设置连接块4间接连接，可以减小单个焊接点的大小，适用于一路或多路(每相绕组中的并联支数)且结构稳定，另外，还可以方便更换连接块4。其中，当每相中包括多路星点线时，连接块可以包括与多相绕组一一对应的多个，且多个连接块与每相中合并连接后的星点线一一对应地连接。
另外，连接块也可以包括多个且分别与每相每路星点线一一对应地连接。
具体地，星点线24与连接块4面接触且焊接固定，中性线3与连接块4面接触且焊接固定。
下面结合附图7-9对连接块4进行进一步描述。
在一些示例中，如图9所示，连接块4的相对两个表面分别与星点线24和中性线3连接。由此，可以简化结构、易实现，且占用空间相对较少。这里，当星点线24、连接块4和中性线3沿定子铁芯1的径向内外相对时，连接块4径向的内表面和外表面分别与星点线24和中性线3连接；当星点线24、连接块4和中性线3沿定子铁芯1的轴向上下相对时，连接块4的上表面和下表面分别与星点线24和中性线3连接。
连接块4的相对的两个表面平行。
具体地，如图9所示，定子绕组2各相星点线的线端沿定子铁芯1的轴向延伸，每个连接块4的径向内表面与星点线24的线端的径向外表面焊接，连接块4的径向外表面与中性线3焊接。
其中，当每相中包括多路星点线时，每个连接块的径向内表面可以与每相中合并后的多路星点线中的任一路星点线的线端的径向外表面焊接，连接块4的径向外表面与中性线3焊接。
另外，每个连接块的径向内表面也可以与每相每路星点线的线端的径向外表面焊接，连接块4的径向外表面与中性线3焊接。
具体地，定子绕组2的各相星点线24的线端可以沿定子铁芯1的径向向外延伸并折弯预设角度，以形成径向突出部，连接块分别与径向凸出部分别连接。
优选地，在定子铁芯的轴向方向上，连接块的高度不高于所述星点线的线端的高度。例如如图9所示，连接块的上端面不高于星点线的线端的上端面。由此，可以方便连接块与星点线连接，且避免占用额外的空间。
优选地，在定子铁芯1的轴向方向(例如图9中所示的上下方向)上，连接块4的距离小于等于中性线3的距离。这里，连接块在定子铁芯轴向上的距离是指，连接块沿定子铁芯轴向上的高度或尺寸，中性线的距离是指中性线在沿定子铁芯轴向上的高度或尺寸。例如，连接块4在定子铁芯1轴向方向的两端均不超出中性线3在定子铁芯1轴向方向的两端。
如图9所示，连接块4形成为长方体形状，中性线3的横截面和星点线24的线端的截面均为方形，连接块4的径向内表面和外表面分别与星点线24和中性线3贴合并焊接，其中，连接块4的上表面与星点线24的线端的上表面以及中性线3的上表面平齐，且连接块4的下表面与中性线3的下表面平齐。
优选地，在定子铁芯1的径向方向上，每相中各路的所述星点线连接的连接块4的 截面积大于等于每相中各路的星点线24的横截面积之和。例如，当一相绕组中仅具有一路时，连接块4在径向方向的截面积不小于该路星点线24的横截面积；当一相绕组中具有两路并联支路时，连接块4在径向上的截面积不小于该相中的两路星点线24的横截面积之和；当一相绕组中具有三路并联支路时，连接块4在径向上的截面积不小于该相中的三路星点线24的横截面积之和，以满足连接块与星点线之间电连接需求。具体地，根据电阻的计算公式，导体的电阻的大小与导体的截面积大小呈反比，因此，连接块4的截面积大于等于每相中各路的星点线24垂直于其长度方向的横截面积之和，连接块4单位长度的电阻小于或等于每相中各路的星点线24单位长度的电阻，所以连接块4单位长度的发热量小于或等于每相中各路的星点线24单位长度的发热量，避免了连接块4局部过热的问题。
在一些示例中，如图7和图8所示，连接块4内可以具有容纳空间401，中性线3穿过并容纳在容纳空间401内，由此，可以减少占用空间，并且，在电机运行过程中，会出现不同程度的震动，此震动容易造成中性线与星点线的焊接部位出现脱落，为此，中性线3穿过并容纳在容纳空间401内，使中性线与容纳空间的连接更加稳定，不易造成中性线的脱落。其中，可选地，容纳空间401可以形成为弧形、U形或多边形。
进一步地，如图8所示，星点线24的线端沿定子铁芯的轴向(例如图8中所示的上下方向)延伸；连接块4被构造成为U形形状，且连接块4可以包括：内支腿41和外支腿42，其中，内支腿41呈沿定子铁芯1的轴向朝向远离定子铁芯1的方向竖向延伸的长条状，外支腿42也呈沿定子铁芯1的轴向朝向远离定子铁芯1的方向竖向延伸的长条状，内支腿41和外支腿42在定子铁芯1的径向方向上分隔开，且在沿定子铁芯的径向方向上内支腿41位于外支腿42的内侧。内支腿41与星点线24的线端焊接，中性线3焊接在内支腿41和外支腿42之间。
其中，如图11所示，当每相中包括多路星点线时，内支腿可以与每相中合并后的多路星点线中的任一路星点线的线端焊接，中性线焊接在内支腿和所述外支腿之间。
另外，内支腿也可以与每相每路星点线的线端焊接，中性线焊接在内支腿和所述外支腿之间。
可选地，中性线3可以焊接在外支腿42的径向内表面上，且中性线3与连接在外支腿42和内支腿41底部的U形底壁43间隔开。当然，本公开不限于此，中性线3也可以焊接在连接在外支腿42和内支腿41底部的U形底壁43上，也就是说，中性线3也可以焊接在U形底壁43上，其中，U形底壁43上连接在外支腿42和内支腿41的底部。
进一步地，如图8所示，容纳空间401的顶部敞开，以便于中性线3可以从上往下 伸入容纳空间401内，方便装配。优选地，中性线3的顶面与连接块4的顶面平齐，以减少占用空间。
在一些示例中，中性线3为横截面为长方形的弧形线段，且弧形线段的中性线3与定子铁芯1同心，这样，可以使中性线3与沿周向间隔的多个星点线24之间沿径向方向的距离均匀，以便于中性线3与各星点线24相连。
进一步地，中性线3在定子铁芯1径向上的宽度小于中性线3在定子铁芯1轴向上的高度，由此，可以减少径向方向的占用空间，方便连接。
在本公开的一些实施例中，中性线3与星点线24连接后，在中性线3与焊接端23之间限定出避让空间5，避让空间5适于容纳位于相邻两相的星点线24之间的定子绕组最外层。例如图4所示，中性线3具有多个向内延伸的触角32，每个触角32与对应的星点线24焊接连接，当中性线3上的触角32与星点线24之间连接后，相邻两相对应的触角32之间具有避让空间5，相邻两相星点线24之间的定子绕组最外层可以容纳在此避让空间5内，以避免绕组与中性线3干涉。
在本公开的一些实施例中，中性线在定子铁芯周向上的跨度大于等于各相星点线在周向上的最大跨度。以保证中性线有足够的长度可以连接各相的星点线。例如图1所示，中性线沿定子铁芯周向上的长度不小于三相星点线中距离最远的两星点线之间沿定子铁芯周向上的距离，也就是说，中性线在周向上的跨度大于等于三相星点线线在周向上的跨度，这样中性线才能连接到三相的星点线。
可选地，中性线的横截面面积大于或者等于每相的星点线的横截面积。
具体地，中性线垂直于其长度方向的横截面面积大于等于星点线的垂直于其长度方向的横截面积。
在本公开的一些实施例中，中性线3的沿定子铁芯径向方向的横截面面积大于等于每相中各路星点线24的截面积之和。具体地，定子绕组2的绕线并联支路数为1路时，中性线3的横截面面积大于等于星点线24的横截面面积；定子绕组2的绕线并联之路数为2路时，中性线3的横截面面积大于等于两路的截面积之和。由此，可以满足中性线3与星点线24电连接需求。具体地，根据电阻的计算公式，导体的电阻的大小与导体的截面积大小呈反比，因此，中性线3的截面积大于等于每相中各路的星点线24垂直于其长度方向的横截面积之和，中性线3单位长度的电阻小于或等于每相中各路的星点线24单位长度的电阻，所以中性线3的单位长度的发热量小于或等于每相中各路的星点线24单位长度的发热量，避免了中性线3局部过热的问题。
在本公开的一些实施例中，中性线3可以被构成为横截面为长方形的扁线。进一步地，在中性线3的延伸方向上，其横截面面积相同。
在本公开的一些实施例中，中性线3可以为压制成型的铜排。中性线3也可以为横截面为圆形的铜线。当然，在本公开的一些实施例中，中性线3也可以为散线。
优选地，中性线3的材料可以与导体段21的材料一致，以提高中性线3与星点线24之间连接的可靠性。
在本公开的一些实施例中，如图11所示，每相中的多路星点线24合并连接后、再与中性线3连接。可选地，每相中的多路星点线24之间可以直接焊接，也可以通过连接条焊接。
例如图11所示，每相绕组的并联支路数为2，在连接中性线3的过程中，同一相中的两路星点线24可以先焊接在一起，然后再将其中一路星点线24与连接块4焊接，连接块4再与中性线3焊接。
在本公开的一些实施例中，如图1-图9所示，定子绕组2的绕线并联支路数为至少一路，每相每路星点线24均单独与中性线3连接，例如，定子绕组2的绕线并联支路数为2路，所述定子绕组设置两个中性线3，每个中性线3与每相每路星点线24连接，所述两个中性线3在定子绕组的轴向上平行设置，可减小定子绕组径向上的空间。
参照图19，根据本公开第二方面实施例的电机1000，包括根据本公开第一方面实施例的定子组件100。
根据本公开实施例的电机1000的其他构成例如转子等的结构和操作均为本领域技术人员所熟知的，这里不再赘述。
根据本公开实施例的电机1000，通过设置根据本公开第一方面实施例的定子组件，从而提高了电机1000的整体性能。
参照图20，根据本公开第三方面的车辆10000，包括根据发明第二方面实施例的电机1000。
根据本公开实施例的车辆10000，通过设置根据本公开第二方面实施例的电机1000，从而提高了车辆10000的整体性能。
参照图12-图18，下面以本公开实施例的定子组件用于8极48槽3相的电机为例对本公开实施例的定子组件中的定子绕组的绕线方法进行说明：即定子槽数z＝48，相数m＝3，其中，三相包括U相、V相和W相；极数2p＝8(即极对数为4)，且三相中的每相均包括两路。
如图15所示，定子组件100的定子绕组2中，U形导体段20的第一槽内部分202和第二槽内部分203之间的节距均为y个定子槽，其中y为整数且y＝z/2p。对于8极48槽的定子组件100来说，y＝6。也就是说，每个U形导体段20的第一槽内部分202 和第二槽内部分203之间相差6个定子槽。
在下面的描述中，以每个定子槽11中以6层为例对本公开进行说明，6个槽层包括依次排列的a、b、c、d、e、f各层，在每个定子槽11中，在定子铁芯1的径向方向上位于最内层的为a层，位于最外层的为f层。
如图15所示的定子组件中，U相每一路的星点线和引出线之间相差6个定子槽，各相的两路之间在周向上相差1个定子槽；U相、V相、W相中相邻相对应的星点线在周向上相差4个定子槽；U相、V相、W相中相邻相对应的引出线在周向上相差4个定子槽。
更具体地，如图16和图17中所示，U相1路的引出线U1A和U相2路的引出线U2A之间相差1个定子槽，V相1路的引出线V1A和V相2路的引出线V2A之间相差1个定子槽；W相1路的引出线W1A和W相2路的引出线W2A之间相差1个定子槽。
如图16和图17中所示，U相1路的引出线U1A和U相1路的星点线U1B之间相差6个定子槽，U相2路的引出线U2A和U相2路的星点线U2B之间相差6个定子槽；同样地，V相中两路的引出线V1A和星点线V1B、引出线V2A和星点线V2B之间也相差6个定子槽；W相中两路的引出线W1A和星点线W1B、引出线W2A和星点线W2B之间也相差6个定子槽。
进一步地，U相、V相、W相中相邻相对应的星点线在周向上相差4个定子槽，具体而言，以第一路为例，U相1路的星点线U1B、V相1路的星点线V1B、和W相1路的星点线W1B在周向上依次相差4个槽，例如图15中所示，U1B从07槽e层引出，V1B从03槽e层引出，W1B从47槽e层引出。类似地，第二路的U2B、V2B和W2B分别从08槽e层、04槽e层和48槽e层引出，它们之间依次相差4个定子槽。
相应地，U相、V相、W相中相邻相对应的引出线在周向上相差4个定子槽。具体而言，以第一路为例，U相1路的引出线U1A、V相1路的引出线V1A、W相1路的引出线W1A在周向上依次相差4个槽，例如图15中所示，U1A自01槽f层引入，V1A从45槽f层引入，而W1A自41槽f层引入。类似地，第二路的U2A、V2A和W2A分别自02槽f层、46槽f层和42槽f层引入，它们之间依次相差4个定子槽。
而上述绕线线圈结构可以通过如下绕线方法进行绕制，如图16和图17所示，以U相第一路为例，其绕线路线如下：
1f→43f→1e→7d→13c→19b→25a→19a→13b→7c→1d→43e→37f→31f→37e→43d→1c→7b→13a→7a→1b→43c→37d→31e→25f→19f→25e→31d→37c→43b→1a→43a→37b→31c→25d→19e→13f→7f→13e→19d→25c→31b→37a→31a→25b→19c→13d→7e
其中U相第二路的绕线线路在周向上与所述U相第一路相差1个定子槽，
U相、V相、W相中相邻相对应的星点线在周向上相差4个定子槽；
U相、V相、W相中相邻相对应的引出线在周向上相差4个定子槽。
在通过上述绕组绕制方法进行绕制时，采用了多个第一U形导体段、多个第二U形导体段2002、多个第三U形导体段2003和多个第四U形导体段2004，仍以U相第一路为例，参考图16和上述绕线路线，绕制每相每路定子绕组的情况具体如下：
引出线U1A在焊接端上引入初始槽第1槽的径向最外槽层1f，与第一U形导体段2001的第一槽内部分连接，第一U形导体段2001沿反向同层跨越6个定子槽，到达第43槽的径向最外槽层43f；其中，正向为电机转子旋转的方向，反向为电机旋转转子的反方向。
通过多个第二U形导体段2002沿正向跨越且依次连接，每个第二U形导体段2002跨越6个定子槽，每个第二U形导体段2002的第二槽内部分所在槽层比第一槽内部分所在槽层沿径向向内一层，直至第二槽内部分位于径向次内槽层为止，即通过一个第二U形导体段2002从第43槽的径向最外槽层43f跨越至第1槽的径向次外槽层1e，通过下一个第二U形导体段2002从第1槽的径向次外槽层1e跨越至第7槽的槽层7d，以此类推，直至到达第19槽的径向次内层19b；
通过一个第三U形导体段2003沿反向同层跨越6个定子槽，从第25槽的径向最内槽层25a到达第19槽的径向最内槽层19a；
通过多个第四U形导体段2004沿反向跨越且依次连接，每个第四U形导体段2004跨越6个定子槽，每个第四U形导体段2004的第二槽内部分所在槽层比第一槽内部分所在槽层沿径向向外一层，直至第二槽内部分位于径向次外槽层为止，即，通过一个第四U形导体段2004从第19槽的径向最内槽层19a跨越至第13槽的径向次内槽层13b，通过下一个第四U形导体段2004从第13槽的径向次内槽层13b跨越至第7槽的槽层7c，以此类推，直至到达第43槽的径向次外层43e；
再采用第一U形导体段2001、第二U形导体段2002、第三U形导体段2003和第四U形导体段2004重复上述设置，直至某个第四U形导体段2004的第二槽内部分到达终止槽第7槽的径向最外槽层的相邻层(即次外槽层7e)且连接该相该路的星点线U1B，其中终止槽第7槽在在正向上与初始槽相差6个定子槽。
在一些实施例中，针对适用于8极48槽3相的电机的定子组件，在其初始定子组件100的基础上，可选择将其加工成两路方案或一路方案。
当用户选择为两路方案时，将U、V、W三相的第一路星点线U1B、V1B、W1B、以及第二路星点线U2B、V2B、W2B分别向外折弯，并通过中性线3焊接相连，如图18所示，最后将U、V、W三相的第一路引出线U1A、V1A、W1A、以及第二路引出线U2A、V2A、W2A通过焊接端子焊接固定后与外部控制器接口相连。
当用户选择为一路方案时，将U、V、W三相的第二路引出线U2A、V2A、W2A拉长折弯后，与U、V、W三相的第一路星点线U1B、V1B、W1B分别焊接固定，且第二路星点线U2B、V2B、W2B分别向外折弯，通过中性线3焊接相连。最后，将U、V、W三相的第一路引出线U1A、V1A、W1A通过焊接端子焊接固定后与外部控制器接口相连。
当然，当定子槽数、极数和相数不同时，每相每路的定子绕组结构也是不同的。
例如，当定子槽数为72，极数为8，相数为3且包括U相、V相和W相，每相包括三路(图未示出)，其中，U相每一路的星点线和引出线之间相差9个定子槽11，U相的三路之间两两在周向上相差1个定子槽11；V相的三路之间两两在周向上相差1个定子槽11，W相的三路之间两两在周向上相差1个定子槽11，U相、V相、W相对应的星点线在周向上相差6个定子槽11，U相、V相、W相对应的引出线在周向上相差6个定子槽11。
值得注意的是，在一些优选的实施例中，在线圈绕组的焊接端II上，任一相每一路的星点线位于径向上最外层，且任一相每一路的引出线位于径向上的次外层，这样便于引出线的引入、星点线的引出，而且整个线圈绕组结构简单。
综上所述，采用上述绕线方法的根据本公开实施例的定子组件100，仅在焊接端上有焊接点，而在发卡端上无焊接端子，焊接工艺简单方便；绕线所需线圈种类少，所需设备少，容易实现批量生产。另外，采用此种绕线方法，使得同槽内相邻槽层之间的扁线电压差比现有方案小，能有效减少电机绝缘击穿风险，可靠性高；此外，绕组路数容易调整。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本公开的实施例，本领域的普通技术人员可以理解：在不脱 离本公开的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本公开的范围由权利要求及其等同物限定。

Claims (14)

  1. 一种定子组件，其特征在于，包括：
    圆筒形的定子铁芯，所述定子铁芯上具有沿所述定子铁芯的圆周方向间隔排列的多个定子槽；
    定子绕组，所述定子绕组包括多个导体段，每个所述导体段包括设置在定子铁芯的定子槽中的槽内部分、设置在所述定子铁芯外部的第一端和第二端，所述槽内部分连接在所述第一端和所述第二端之间，多个导体段的所述第二端形成焊接端，所述定子绕组各相的星点线均位于所述焊接端，所述定子绕组的绕组并联支路数为多路；
    中性线，所述中性线沿周向环绕所述定子绕组的所述焊接端，每相每路的星点线均单独与所述中性线连接。
  2. 根据权利要求1所述的定子组件，其特征在于，所述定子绕组的绕组并联支路的路数与中性线的数量相同。
  3. 根据权利要求2所述的定子组件，其特征在于，所述星点线包括U相1路星点线和U相2路星点线，V相1路星点线和V相2路星点线，W相1路星点线和W相2路星点线；所述U、V、W相1路星点线通过第一中性线连接；所述U、V、W相2路星点线通过第二中性线连接。
  4. 根据权利要求1-3中任一项所述的定子组件，其特征在于，所述导体段的横截面为矩形形状。
  5. 根据权利要求4所述的定子组件，其特征在于，所述导体段为U形导体段，所述U形导体段包括设置在定子槽中的第一槽内部分和第二槽内部分，所述第一端为连接所述第一槽内部分和第二槽内部分一端的U形折弯部，多个所述U形导体段中的U形折弯部形成所述定子绕组的发卡端、且所述第一槽内部分和所述第二槽内部分的另一端延伸形成所述定子绕组的焊接端。
  6. 根据权利要求1-5中任一项所述的定子组件，其特征在于，所述定子绕组各相的星点线位于定子绕组径向上次外层。
  7. 根据权利要求1-6中任一项所述的定子组件，其特征在于，所述中性线与每相每路星点中性线之间直接焊接相连。
  8. 根据权利要求7所述的定子组件，其特征在于，所述中性线形成为弧形线段形状。
  9. 根据权利要求1-8中任一项所述的定子组件，其特征在于，所述每相每路星点 线与所述中性线通过至少一个连接块间接连接。
  10. 根据权利要求9所述的定子组件，其特征在于，所述连接块包括多个且分别与每相每路星点线一一对应地连接。
  11. 根据权利要求10所述的定子组件，其特征在于，所述星点线与所述连接块面接触且焊接固定，所述中性线与所述连接块面接触且焊接固定。
  12. 根据权利要求1-11中任一项所述的定子组件，其特征在于，所述中性线垂直于其长度方向的横截面面积大于或者等于每相的所述星点线的垂直于其长度方向的横截面积。
  13. 一种电机，其特征在于，包括根据权利要求1-12中任一项所述的定子组件。
  14. 一种车辆，其特征在于，包括根据权利要求13中所述的电机。
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