WO2019062921A1

WO2019062921A1 - Stator assembly, motor provided with same, and vehicle

Info

Publication number: WO2019062921A1
Application number: PCT/CN2018/108658
Authority: WO
Inventors: 田凯丽; 游斌; 齐文明
Original assignee: 比亚迪股份有限公司
Priority date: 2017-09-29
Filing date: 2018-09-29
Publication date: 2019-04-04
Also published as: CN109586465A; CN109586465B

Abstract

A stator assembly, a motor provided with the same, and a vehicle. The stator assembly comprises stator windings (2), neutral lines (3), and multiple connecting blocks (4). Star point lines (24) of a part in each phase, of the stator winding (2) are all located on the welded end (23). The neutral lines surround the welded end of the stator winding in a circumferential direction. Each connecting block is provided with an accommodation space (401) therein. The neutral lines (3) run through and are welded in the accommodation spaces (401) to connect the star point lines (24) of a part in each phase, of the stator winding.

Description

Stator assembly and motor and vehicle therewith

Cross-reference to related applications

The present disclosure is based on a Chinese patent application filed on Jan. 29, 2017, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present disclosure relates to the field of electrical machinery, and more particularly to a stator assembly and a motor and vehicle therewith.

Background technique

In the related art, the neutral line is connected by two U-shaped lines to connect the three connecting parts, which causes the intermediate welding part to be thicker, takes up a large space, and the welding performance is difficult to ensure.

Summary of the invention

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 according to the present disclosure 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 end of the plurality of conductor segments forms a soldering end, and the star-point lines of each phase of the stator winding are located on the soldering end; the neutral line, The neutral line circumferentially surrounds the welded end of the stator winding; a plurality of connecting blocks each having an accommodating space therein, the neutral wire passing through and soldered in the accommodating space To connect to the phase line of each phase of the stator winding.

According to the stator assembly of the present disclosure, by arranging a neutral line and connecting the star point line to the neutral line through the connection block, instead of the prior art, 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.

The additional aspects and advantages of the present disclosure will be set forth in part in the description which follows.

DRAWINGS

The above and/or additional aspects and advantages of the present disclosure will become apparent and readily understood from

1 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 2 is an enlarged view of the star point line, the connecting block and the neutral line connection shown in Figure 1;

3 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;

4 is a schematic diagram of a stator assembly in which two-way 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 5 is an enlarged view of the star point line, the connecting block and the neutral line connection shown in Figure 4;

6 is a schematic view of a stator core in a stator assembly in accordance with an embodiment of the present disclosure;

7 is a schematic illustration of a U-shaped conductor segment in a stator assembly in accordance with an embodiment of the present disclosure;

8a-8d 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;

9 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 10 is a schematic view showing the winding mode of the stator assembly of Figure 9, wherein the U-phase 1 road is taken as an example;

Figure 11 is a final stator assembly of the stator assembly of Figure 9 after being processed to form a 2-way connection;

Figure 12 is a final stator assembly of the stator assembly of Figure 9 after being processed to form a 1-way connection;

Figure 13 is a schematic illustration of a motor in accordance with an embodiment of the present disclosure;

14 is a schematic diagram of a vehicle in accordance with an embodiment of the present disclosure.

Reference mark:

Stator assembly 100,

Stator core 1,

Stator winding 2, conductor segment 21, card issuing end 22, soldering end 23, star point line 24, lead line 25,

Neutral 3,

Connecting block 4, receiving space 401, inner leg 41, outer leg 42, U-shaped bottom wall 43,

Avoid space 5.

Detailed ways

The embodiments of the present disclosure are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative only, and are not to be construed as limiting.

In the description of the present disclosure, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", The orientation or positional relationship of the "bottom", "inside", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, only for the convenience of description. The disclosure and the simplification of the present disclosure are not to be construed as limiting or limiting the scope of the present disclosure. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present disclosure, "a plurality of" means two or more unless otherwise stated.

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. The specific meanings of the above terms in the present disclosure can be understood in the specific circumstances 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. Among them, the stator assembly 100 of the embodiment of the present disclosure may be used in an m-phase motor, and m=1, 2, 3, . That is, the stator assembly 100 can be used for a one-phase motor, a two-phase motor, a three-phase motor, and the like. In the following, only the m-phase motor is used as a three-phase motor as an example. Of course, those skilled in the art can clearly understand that 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. .

As shown in FIG. 1, a stator assembly 100 of an embodiment of the present disclosure includes a stator core 1, a stator winding 2, a connecting block 4, and a neutral wire 3.

Specifically, 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. In some embodiments of the invention, 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.

In one embodiment, 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.

a stator winding, the 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.

As shown in FIG. 1, each conductor segment 21 includes: an in-slot portion (for example, a first in-slot portion and a second in-slot portion described later) and a bent portion, wherein the in-slot portion is disposed in the stator slot 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 groove portion shown in FIG. 1) extends beyond the stator core 1, and the end portion of the end portion of the groove portion ( 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 on the welding end 23, that is to say, the respective phase star lines 24 of the stator winding 2 are led out from 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 the welding end 23 The star point line 24 is connected.

The neutral line 3 is connected to the star point line 24 of each phase. That is to say, 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.

In some examples, as shown in FIGS. 1 and 2, the connection block includes 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. By setting the indirect connection of the connection block 4, the size of a single solder joint can be reduced, and it is suitable for one or more paths (parallel counts in each phase winding) and the structure is stable, and the connection block 4 can be easily replaced. Wherein, when each phase includes multiple stellar dotted lines, 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 .

In addition, the 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 connecting block 4 may have a receiving space 401 through which the neutral wire 3 passes and is accommodated in the receiving space 401 to be connected to the respective star-point lines of the stator winding. Thereby, the occupied space can be reduced, and during the running of the motor, different degrees of vibration occur, and the vibration easily causes 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 It is accommodated in the accommodating space 401, so that the connection between the neutral line and the accommodating space is more stable, and it is difficult to cause the neutral line to fall off. Wherein, optionally, the cross section of the accommodating space 401 in the radial direction of the stator core 1 may be formed in an arc shape, a U shape or a polygon shape.

One specific embodiment of the stator assembly 100 of the present disclosure is described below.

As shown in FIG. 1, the stator assembly 100 of the present embodiment is used for a three-phase motor, and 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, and a parallel branch in each phase winding. The number of roads is 2, that is, 2 channels are connected in parallel. Of course, 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.

When the three-phase winding adopts a Y-connection (ie, a star connection), one end of each of 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.

Specifically, as shown in FIG. 2, 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 W phase one way lead line 25e and the W phase two way lead line 25f. The six star-point lines 24 of the three-phase winding are: U-phase one-way star point line a, U-phase two-way star point line b, V-phase one-way star point line c, V-phase two-way star point line d, W-phase one-way star Dotted line e, W phase two way star point line f.

The six star-point lines 24 are respectively connected to the neutral line 3, that is, the star-point lines 24 of each of the respective phases are respectively connected to the neutral line 3.

In the related art, 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. Thus, in the embodiment of the present disclosure, 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. And the connection method is simple, which is convenient for mass production.

According to the stator assembly 100 of the embodiment of the present disclosure, by providing the neutral line 3 and connecting the star point line 24 to the neutral line 3, respectively, instead of the prior art, the neutral line is respectively composed of two line U-shaped lines. The connecting points of the three star-point lines are connected two by two, 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 radial space of the occupied stator assembly 100, and the structure Compact, the space occupied by the casing and end cover of the motor is minimized to meet the requirements of miniaturization of the motor.

In some embodiments, the cross section of the conductor segments 21 perpendicular to their length is non-circular. The shape of the cross section of the conductor segment 21 is a rectangle. 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. Of course, the cross section of the conductor segment 21 perpendicular to its length may also be other shapes such as a trapezoid or the like.

In some embodiments, the conductor segment 21 can be a U-shaped conductor segment, the U-shaped conductor segment including a first in-slot portion and a second in-slot portion disposed in the stator slot, the first end being connected to the first slot a U-shaped bent portion of the portion and the inner portion of the second groove; the U-shaped bent portion of the plurality of U-shaped conductor segments forms a hairpin end of the stator winding, and the second end portion of the first groove inner portion and the second groove inner portion Forming the welded end of the stator winding.

As shown in FIG. 1, the U-shaped conductor segments 21 each include: a U-shaped bent portion, a first in-slot portion and a second in-slot portion, wherein the first in-slot portion and the second in-slot portion are disposed on the stator In the groove, the first in-slot portion and the second in-slot portion are respectively connected to the U-shaped bent portion, and the first in-slot portion and the second in-slot portion pass through the stator slot and the end portion thereof exceeds the stator core 1. For example, the lower end of the inner portion of the first groove and the lower end of the inner portion of the second groove are connected to the U-shaped bent portion, and the upper end of the inner portion of the first groove and the upper end of the inner portion of the second groove pass through the stator groove and extend An axial end portion of the stator core 1 (for example, the upper end of the stator core 1 shown in Fig. 1) is taken out to facilitate connection of the plurality of conductor segments 21.

Wherein, one end of the U-shaped bent portion of the plurality of conductor segments 21 is the card-issuing end 22 of the stator winding 2, and the end of the end portion of the first in-slot portion and the second in-slot portion is referred to as the welded end of the stator winding 2 In the present disclosure, for the sake of clarity, 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.

In the axial direction of the stator core 1 (for example, the up and down direction shown in FIG. 3), the distance of the connecting block 4 is less than or equal to the distance of the neutral line 3. Here, 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, and the distance of the neutral line refers to the height of the neutral line in the axial direction of the stator core. Or size. For example, 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.

As shown in FIG. 3, the connecting block 4 is formed in a rectangular parallelepiped shape, and 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.

In the radial direction of the stator core 1, the cross-sectional area of the connecting block 4 to which the star-point lines of the respective paths in each phase are connected is greater than or equal to the sum of the cross-sectional areas of the star-point lines 24 of the respective paths in each phase. For example, when there is only one path in one phase winding, 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 between the connection block and the star point line.

Specifically, according to the calculation formula of the resistance, 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.

As shown in FIG. 2, 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. 2); the connection block 4 is configured in a U shape, and the connection block 4 may include: The inner leg 41 and the outer leg 42, the inner leg 41 and the outer leg 42 are spaced apart in the radial direction of the stator core 1, and the inner leg 41 is welded to the line end of the star point line 24, the neutral line 3 welded between the inner leg 41 and the outer leg 42.

Wherein, as shown in FIG. 5, when each phase includes a plurality of star-point lines, the inner legs can be welded with the line ends of any of the merged multi-point star-point lines in each phase, neutral The wire is welded between the inner leg and the outer leg.

Alternatively, 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.

Alternatively, 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. Of course, the present disclosure is not limited thereto, and 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. On the wall 43, wherein the U-shaped bottom wall 43 is joined to the bottom of the outer leg 42 and the inner leg 41.

As shown in Fig. 2, 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 easy assembly. The top surface of the neutral line 3 is flush with the top surface of the connecting block 4 to reduce the space occupied.

In some examples, 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 space in the radial direction can be reduced and the connection can be facilitated.

In some embodiments of the present disclosure, 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. In order to ensure that the neutral line has enough length to connect the star points of each phase. For example, as shown in FIG. 1, 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.

Optionally, 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.

Specifically, 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.

In some embodiments of the present disclosure, 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. Specifically, when 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. When 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. Thereby, the electrical connection between the neutral line 3 and the star point line 24 can be satisfied. Specifically, according to the calculation formula of the resistance, 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.

In some embodiments of the present disclosure, the neutral line 3 may be constructed as a rectangular line having a rectangular cross section. In the direction in which the neutral line 3 extends, the cross-sectional area is the same.

In some embodiments of the present disclosure, 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. Of course, in some embodiments of the present disclosure, 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.

In some embodiments of the present disclosure, as shown in FIG. 5, the multiplexed star-point lines 24 in each phase are joined and then connected to the neutral line 3. Alternatively, the multiple star-point lines 24 in each phase may be welded directly or through a connecting strip.

For example, as shown in FIG. 5, 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 connected. The wire 24 is welded to the connecting block 4, which is then welded to the neutral wire 3.

In some embodiments of the present disclosure, as shown in FIGS. 1-3, 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, 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 The lines 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.

Referring to Figure 13, 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.

Other configurations of the motor, such as the structure and operation of the rotor, etc., according to embodiments of the present disclosure are well known to those skilled in the art and will not be described herein.

The motor 1000 according to an embodiment of the present disclosure improves the overall performance of the motor by providing the stator assembly according to the embodiment of the first aspect of the present disclosure.

Referring to FIG. 14, a vehicle 10000 according to a third aspect of the present disclosure includes a motor 1000 according to an embodiment of the disclosed second aspect.

The vehicle 10000 according to an embodiment of the present disclosure improves the overall performance of the vehicle by providing the motor 1000 according to the embodiment of the second aspect of the present disclosure.

Referring to FIG. 6 to FIG. 12 , the winding method of the stator winding in the stator assembly of the embodiment of the present disclosure is described below by using the stator assembly of the embodiment of the present disclosure for an 8-pole 48-slot 3-phase motor as an example: z = 48, the number of phases m = 3, wherein the three phases include the U phase, the V phase, and the W phase; the number of poles is 2p = 8 (i.e., the number of pole pairs is 4), and each of the three phases includes two paths.

As shown in FIG. 9, in the stator winding 2 of the stator assembly 100, the pitch between the first in-slot portion 202 and the second in-slot portion 203 of the U-shaped conductor segment 20 is y stator slots, where y is an integer And y=z/2p. For an 8-pole 48-slot stator assembly 100, y=6. That is, the first in-slot portion 202 and the second in-slot portion 203 of each U-shaped conductor segment 20 differ by six stator slots.

In the following description, the present disclosure will be described by taking six layers in each stator slot 11 as an example. The six groove layers include layers a, b, c, d, e, and f arranged in sequence, in each stator slot. In the eleventh aspect, the innermost layer in the radial direction of the stator core 1 is the a layer, and the outermost layer is the f layer.

In the stator assembly shown in FIG. 9, 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 corresponding star point line of W differs by four stator slots in the circumferential direction; the corresponding line of U phase, V phase, and W differs by four stator slots in the circumferential direction.

More specifically, as shown in FIG. 10 and FIG. 11, 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.

As shown in FIG. 10 and FIG. 11, 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.

The adjacent star-point lines in the U-phase, V-phase, and W-phase are different from each other in the circumferential direction by four stator slots. Specifically, taking the first path as an example, the U-phase 1-way star-point line U1B and V-phase 1 The star point line V1B of the road and the star point line W1B of the W phase 1 road are sequentially different by 4 slots in the circumferential direction. For example, as shown in FIG. 9, U1B is taken out from the 07 slot e layer, and V1B is taken out from the 03 slot e layer, W1B. It is taken out from the 47-slot e layer. Similarly, 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.

Correspondingly, adjacent ones of the U phase, the V phase, and the W phase are different in the circumferential direction by four stator slots. Specifically, taking the first path as an example, 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. As shown, U1A is introduced from the 01-slot f layer, V1A is introduced from the 45-slot f-layer, and W1A is introduced from the 41-slot f-layer. Similarly, 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. 10 and FIG. 11, taking the U-phase first path as an example, the winding line is as follows:

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

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.

In the winding by the above winding winding method, a plurality of first U-shaped conductor segments, a plurality of second U-shaped conductor segments 2002, a plurality of third U-shaped conductor segments 2003, and a plurality of fourth U-shaped conductors are employed. In Section 2004, the U-phase first path is still taken as an example. Referring to FIG. 16 and the above-mentioned winding line, the case of winding each stator winding of each phase is as follows:

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. The first U-shaped conductor segment 2001 is in the first direction The layer spans six stator slots and reaches the radially outermost groove layer 43f of the 43rd groove; for example, the second direction is the direction in which the motor rotor rotates, and the first direction is the opposite direction of the motor rotating rotor.

A plurality of second U-shaped conductor segments 2002 are spanned and sequentially connected in a second direction, each second U-shaped conductor segment 2002 spanning six stator slots, and the second slot portion of each second U-shaped conductor segment 2002 is located The groove 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 diameter of the groove from the 43th groove through a second U-shaped conductor segment 2002 The radially outer outer groove layer 1e spanning to the outermost groove layer 43f to the first groove, and the groove from the radially outer outer groove layer 1e of the first groove to the seventh groove by the next second U-shaped conductor segment 2002 7d, and so on until the radial sub-inner layer 19b of the 19th slot is reached;

Through a third U-shaped conductor segment 2003 in the first direction across the same layer spanning six stator slots, from the radially innermost groove layer 25a of the 25th slot to the radially innermost groove layer 19a of the 19th slot;

By a plurality of fourth U-shaped conductor segments 2004 spanning in a first direction and sequentially connected, each fourth U-shaped conductor segment 2004 spans six stator slots, and the second slot portion of each fourth U-shaped conductor segment 2004 is located The groove 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, through the fourth U-shaped conductor segment 2004 from the 19th groove The radially innermost groove layer 19a spans to the radially inner inner groove layer 13b of the thirteenth groove, and passes from the radially inner inner groove layer 13b of the thirteenth groove to the groove of the seventh groove by the next fourth U-shaped conductor segment 2004 Layer 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 at the second The direction is different from the initial slot by 6 stator slots.

In some embodiments, 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.

When the user selects a two-way scheme, 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 center line 3 is welded and connected, as shown in FIG. 12, and finally the first lead wires U1A, V1A, W1A of the three phases of U, V, and W, and the second lead wires U2A, V2A, and W2A are welded and fixed by soldering terminals. Connected to an external controller interface.

When the user selects a one-way scheme, 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. Finally, 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.

Of course, when the number of stator slots, the number of poles, and the number of phases are different, the stator winding structure of each phase is different.

For example, when the number of stator slots is 72, the number of poles is 8, the number of phases is 3, and the U phase, the V phase, and the W phase are included, 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.

It should be noted that in some preferred embodiments, on the welding end II of the coil winding, 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.

In summary, the stator assembly 100 according to the embodiment of the present disclosure 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. In addition, 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. .

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the examples or examples are included in at least one embodiment or example of the present disclosure. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope of the disclosure is defined by the claims and their equivalents.

Claims

A stator assembly, comprising:

a cylindrical stator core having a plurality of stator slots spaced along a circumferential direction of the stator core;

a stator winding, the stator winding including a plurality of conductor segments; each of the conductor segments including an in-slot portion disposed in a stator slot of a 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, and the second end of the plurality of conductor segments forms a soldering end, and a star point of each phase of the stator winding is located at the On the welded end;

a neutral line circumferentially surrounding the welded end of the stator winding;

a plurality of connecting blocks each having an accommodating space therein, the neutral wire passing through and soldered in the accommodating space to be connected to each phase star line of the stator winding.
The stator assembly of claim 1 wherein said conductor segments have a rectangular cross section.
The stator assembly of claim 2 wherein said conductor segments are U-shaped conductor segments, said U-shaped conductor segments comprising a first in-slot portion and a second in-slot portion disposed in the stator slot, The first end is a U-shaped bent portion connecting the first inner groove portion and the second inner groove portion; the U-shaped bent portion of the plurality of U-shaped conductor segments forms a card-issuing end of the stator winding, And the second end of the first in-slot portion and the second in-slot portion form a welded end of the stator winding.
The stator assembly according to any one of claims 1 to 3, characterized in that the cross section of the accommodation space is formed in an arc shape, a U shape or a polygon shape.
The stator assembly according to any one of claims 1 to 4, wherein a line end of the star point line extends axially along the stator core;

The connecting block is configured in a U-shape and includes radially spaced inner and outer legs, the inner leg being welded to the wire end of the star point line, the neutral wire being welded Between the inner leg and the outer leg.
The stator assembly of claim 5 wherein said neutral wire is welded to a radially inner surface of said outer leg and to a bottom portion of said outer leg and said inner leg The U-shaped bottom walls are spaced apart.
The stator assembly of claim 6 wherein said neutral wire is welded to a U-shaped bottom wall joined to the outer leg and the bottom of said inner leg.
A stator assembly according to any one of claims 1 to 7, wherein the top of the receiving space is open and the top surface of the neutral line is flush with the top surface of the connecting block.
A stator assembly according to any one of claims 1-8, wherein the star-point line of each phase of the stator winding is located in the radially outermost outer layer of the stator winding.
The stator assembly according to any one of claims 1 to 9, wherein the neutral line is a curved line segment having a rectangular cross section and is concentric with the stator core, and the width in the radial direction is smaller than Its height in the axial direction.
The stator assembly according to any one of claims 1 to 10, wherein a span of the neutral line in the circumferential direction of the stator core is greater than or equal to a maximum span of the star point line in each direction in the circumferential direction of each phase. .
A stator assembly according to any one of claims 1 to 11, wherein 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 stator assembly according to any one of claims 1 to 12, wherein the neutral line is a press-formed copper row or a copper wire having a circular cross section, and the material of the neutral wire is The materials of the conductor segments are identical.
An electric machine comprising the stator assembly of any of claims 1-13.
A vehicle characterized by comprising the electric machine according to claim 14.