Three-phase winding structure, stator assembly and motor

Abstract

The utility model relates to a three-phase winding structure, a stator assembly and a motor, the stator assembly has three phases and six poles, an iron core piece is provided with 54 conductor slots, each conductor slot comprises six slot layers, the three-phase winding structure comprises winding lines of three phases, the winding lines of each phase are completely wound in the three continuous conductor slots, and the winding lines of each phase are wound in the three continuous conductor slots. The winding lines of the V phase and the W phase are obtained by sequentially translating 6 conductor grooves and 12 conductor grooves in the winding line of the U phase; the winding circuit of each phase comprises two or three winding branches which are connected in parallel, the wire inlet positions and the wire outlet positions of the winding branches are respectively two or three of three continuous conductor grooves, and the wire inlet positions and the wire outlet positions of the winding branches are adjacent to each other. The problem that the phase copper bar assembly and the star point copper bar assembly are inconvenient to lead out due to the fact that the sizes of the phase copper bar assembly and the star point copper bar assembly are large or the distance between the phase copper bar assembly and the star point copper bar assembly is long can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a three-phase winding structure, a stator assembly and an electric machine. BACKGROUND

[0002] The power system of a new energy vehicle usually includes an electric machine, and a three-phase flat wire electric machine is widely used in the field of new energy vehicles due to its small size, high power density, high efficiency, good heat dissipation performance and low noise. The three-phase flat wire electric machine includes a stator assembly, and the stator assembly includes a core member and a three-phase winding structure wound on the core member. For each phase of the three-phase winding structure, the winding line can include a plurality of winding branches, and the plurality of winding branches are usually connected in parallel. In the existing 56-slot 6-pole 6-layer multi-branch three-phase winding structure, in order to facilitate winding, the entry position and the exit position of the three-phase winding structure are usually uniformly distributed on the circumference of the core member, which results in that the size of the phase copper bar assembly connected with the entry position of the three-phase winding structure and the star point copper bar assembly connected with the exit position of the three-phase winding structure is large, which is not conducive to further leading out. SUMMARY

[0003] Therefore, the present application provides a three-phase winding structure, a stator assembly and an electric machine to solve the problem that the phase copper bar assembly and the star point copper bar assembly of the existing 56-slot 6-pole 6-layer multi-branch three-phase winding structure are not convenient to lead out.

[0004] In a first aspect, the present application provides a three-phase winding structure, which is used in a stator assembly, the number of phases of the stator assembly is three phases, and the three phases are U phase, V phase and W phase respectively, the number of poles of the stator assembly is 6 poles, the stator assembly further includes a core member, the core member is provided with 54 conductor slots along the circumference, each conductor slot includes 6 slot layers, the three-phase winding structure includes three-phase winding lines, each phase winding line is completely wound in 3 continuous conductor slots, and is equally spaced by 6 conductor slots, the winding line of the V phase and the W phase is obtained by sequentially translating the winding line of the U phase by 6 and 12 conductor slots respectively; each phase winding line includes 2 or 3 parallel winding branches, the entry position and the exit position of 2 or 3 winding branches of each phase are 2 or 3 of the 3 continuous conductor slots, and the entry position and the exit position of the total 6 or 9 winding branches of the three phases are adjacent along the circumference of the core member.

[0005] In one of the embodiments, each winding branch adopts a lap winding mode.

[0006] In one of the embodiments, each winding branch comprises a plurality of hairpin coils, the hairpin coils comprise a lap winding coil, the lap winding coil is used for lap winding, and comprises a lap winding effective edge, a lap winding welding end and a lap winding hairpin end, the lap winding effective edge is provided with two edges, and is arranged in two conductor grooves respectively, the lap winding welding end corresponds to the lap winding effective edge one by one, two lap winding welding ends are arranged at the same end of the two lap winding effective edges respectively, and extend in the direction of approaching each other, and the lap winding hairpin end connects the other end of the two lap winding effective edges.

[0007] In one of the embodiments, the hairpin coil further comprises an anti-twist coil, a plurality of the lap winding coils are connected to form at least two lap winding groups, the anti-twist coil connects two adjacent lap winding groups, the anti-twist coil comprises an anti-twist effective edge, an anti-twist welding end and an anti-twist hairpin end, the anti-twist effective edge is provided with two edges, and is arranged in two conductor grooves respectively, the anti-twist welding end corresponds to the anti-twist effective edge one by one, two anti-twist welding ends are arranged at the same end of the two anti-twist effective edges respectively, and extend in the same direction, and the anti-twist hairpin end connects the other end of the two anti-twist effective edges.

[0008] In one of the embodiments, the hairpin coil further comprises an introduction wire and an outgoing wire, the introduction wire is used for incoming wire of each winding branch, the outgoing wire is used for outgoing wire of each winding branch, the introduction wire comprises an introduction effective edge, an introduction welding end and an introduction hairpin end, the introduction effective edge is arranged in one conductor groove, the introduction welding end and the introduction hairpin end are arranged at two ends of the introduction effective edge, the outgoing wire comprises an outgoing effective edge, an outgoing welding end and an outgoing hairpin end, the outgoing effective edge is arranged in one conductor groove, and the outgoing welding end and the outgoing hairpin end are arranged at two ends of the outgoing effective edge.

[0009] In one of the embodiments, when each phase comprises 2 parallel winding branches, the first winding branch of the U phase is:

[0010] 1.1-10.2-1.3-10.4-1.5-10.6-20.6-11.5-20.4-11.3-20.2-11.1-2.1-11.2-2.3-11.4-2.5-11.6-21.6-12.5-21.4-12.3-21.2-12.1-21.1-30.2-21.3-30.4-21.5-30.6-37.6-28.5-37.4-28.3-37.2-28.1-37.1-46.2-37.3-46.4-37.5-46.6-3.6-48.5-3.4-48.3-3.2-48.1-38.1-47.2-38.3-47.4-38.5-47.6;

[0011] The first winding branch of the U-phase is:

[0012] 2.6-47.5-2.4-47.3-2.2-47.1-3.1-12.2-3.3-12.4-3.5-12.6-19.6-10.5-19.4-10.3-19.2-10.1-19.1-28.2-19.3-28.4-19.5-28.6-38.6-29.5-38.4-29.3-38.2-29.1-20.1-29.2-20.3-29.4-20.5-29.6-39.6-30.5-39.4-30.3-39.2-30.1-39.1-48.2-39.3-48.4-39.5-48.6-1.6-46.5-1.4-46.3-1.2-46.1;

[0013] The first winding branch of the U-phase is:

[0014] 1.1-10.2-1.3-10.4-1.5-10.6-20.6-11.5-20.4-11.3-20.2-11.1-21.1-30.2-21.3-30.4-21.5-30.6-37.6-28.5-37.4-28.3-37.2-28.1-38.1-47.2-38.3-47.4-38.5-47.6-3.6-48.5-3.4-48.3-3.2-48.1;

[0015] The second winding branch of the U-phase is:

[0016] 2.1-11.2-2.3-11.4-2.5-11.6-21.6-12.5-21.4-12.3-21.2-12.1-19.1-28.2-19.3-28.4-19.5-28.6-38.6-29.5-38.4-29.3-38.2-29.1-39.1-48.2-39.3-48.4-39.5-48.6-1.6-46.5-1.4-46.3-1.2-46.1;

[0017] The third winding branch of the U-phase is:

[0018] 3.1-12.2-3.3-12.4-3.5-12.6-19.6-10.5-19.4-10.3-19.2-10.1-20.1-29.2-20.3-29.4-20.5-29.6-39.6-30.5-39.4-30.3-39.2-30.1-37.1-46.2-37.3-46.4-37.5-46.6-2.6-47.5-2.4-47.3-2.2-47.1.

[0019] In one of the embodiments, the three-phase winding structure further comprises a phase copper bar assembly corresponding to each of the three phases of the stator assembly, the phase copper bar assembly comprising a first copper bar piece and first terminals, the first terminals being connected to the wire-in positions of two or three winding branches of the corresponding phase one by one, and the first copper bar piece connecting two or three first terminals.

[0020] In one of the embodiments, the three-phase winding structure further comprises a neutral point copper bar assembly, the neutral point copper bar assembly comprising a second copper bar piece and second terminals, the second terminals being connected to the wire-out positions of six or nine winding branches of the three phases one by one, and the second copper bar piece connecting six or nine second terminals.

[0021] In the second aspect, the present application provides a stator assembly, which comprises any one of the three-phase winding structures provided by the present application.

[0022] In the third aspect, the present application provides an electric machine, which comprises any one of the stator assemblies provided by the present application.

[0023] In the present application, the wire-in positions and the wire-out positions of two or three winding branches of any one of the three phases are arranged in two or three conductor slots respectively, so as to simplify the sizes of the phase copper bar assembly and the neutral point copper bar assembly. In the present application, the wire-in positions and the wire-out positions of all the winding branches of the three phases are arranged adjacent to each other along the core piece, so as to lead out the phase copper bar assembly and the neutral point copper bar assembly together, thereby solving the problem that the phase copper bar assembly and the neutral point copper bar assembly are difficult to be led out due to their large sizes or large distances. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Structure diagram of the stator assembly to which the three-phase winding structure provided in Embodiment One of the present application is applicable;

[0025] Figure 2 Structure diagram of the conductor slot layer of the stator assembly to which the three-phase winding structure provided in Embodiment One of the present application is applicable;

[0026] Figure 3 The three-phase winding structure provided in Embodiment One of the present application is a winding schematic diagram when the three-phase winding structure is in parallel 2 branches;

[0027] Figure 4 The three-phase winding structure provided in Embodiment One of the present application is a winding schematic diagram of the winding line of U phase when the three-phase winding structure is in parallel 2 branches;

[0028] Figure 5 The three-phase winding structure provided in Embodiment One of the present application is a structure schematic diagram of the lap winding coil of the three-phase winding structure;

[0029] Figure 6 The three-phase winding structure provided in Embodiment One of the present application is a structure schematic diagram of the reverse-twisted coil of the three-phase winding structure;

[0030] Figure 7 The three-phase winding structure provided in Embodiment One of the present application is a structure schematic diagram of the lead-in line or lead-out line of the three-phase winding structure;

[0031] Figure 8 The three-phase winding structure provided in Embodiment One of the present application is a winding schematic diagram when the three-phase winding structure is in parallel 3 branches;

[0032] Figure 9 The three-phase winding structure provided in Embodiment One of the present application is a structure schematic diagram of the stator assembly at the phase copper bar assembly and the star point copper bar assembly;

[0033] Figure 10 The three-phase winding structure provided in Embodiment One of the present application is a structure schematic diagram of the phase copper bar of the three-phase winding structure;

[0034] Figure 11 The three-phase winding structure provided in Embodiment One of the present application is a structure schematic diagram of the star point copper bar of the three-phase winding structure.

[0035] The three-phase winding structure provided in Embodiment One of the present application is a structure schematic diagram of the star point copper bar of the three-phase winding structure. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model.

[0038] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0039] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] Example 1

[0041] Embodiment 1 of this application provides a three-phase winding structure, such as Figures 1 to 11 As shown, a three-phase winding structure is used in the stator assembly. The stator assembly has three phases, namely U-phase, V-phase, and W-phase. The stator assembly has six poles. The stator assembly also includes a core 700, which has 54 conductor slots 710 arranged circumferentially. Each conductor slot 710 includes six slot layers. The three-phase winding structure includes winding lines for three phases. The winding lines of each phase are completely wound within three consecutive conductor slots 710 and are evenly spaced. There are 6 conductor slots 710. The winding lines of the V phase and W phase are obtained by sequentially shifting the winding line of the U phase by 6 and 12 conductor slots 710, respectively. The winding line of each phase includes 2 or 3 parallel winding branches. The entry and exit positions of the 2 or 3 winding branches of each phase are 2 or 3 of the 3 consecutive conductor slots 710, and the entry and exit positions of the 6 or 9 winding branches of the three phases are adjacent along the circumference of the core 700.

[0042] In the embodiment, the number of phases of the stator assembly is three, which is suitable for a three-phase flat motor. The three phases of the stator assembly can be U phase, V phase and W phase, wherein "U", "V" and "W" are only used for description of the three phases of the stator assembly, and are not used for any limitation. In some embodiments, the three phases of the stator assembly can also be represented by other labels.

[0043] As shown in Figure 1 , the stator assembly can include a core piece 700 and a three-phase winding structure, wherein the core piece 700 can be provided as a hollow cylindrical structure, which can be stacked by a plurality of stator lamination pieces, and a conductor slot 710 can be provided on the inner side of the core piece 700, and 54 conductor slots 710 can be provided at equal intervals along the circumference of the core piece 700.

[0044] As shown in Figure 2 , for any conductor slot 710, it includes 6 slot layers. The slot layers 1-6 of the conductor slot 710 can be sequentially provided in the direction from the slot bottom of the conductor slot 710 to the slot opening of the conductor slot 710, that is, sequentially provided in the direction close to the core piece 700. Each slot layer of the conductor slot 710 can be used to arrange a layer of conductors, so as to facilitate the winding of the three-phase winding structure on the core piece 700. Of course, in some embodiments, the slot layers 1-6 of the conductor slot 710 can also be provided in the opposite direction. It should be noted that the slot layers 1-6 are only used for description of the spatial position of the conductor slot 710, and are not used for any limitation. In some embodiments, the 6 slot layers of the conductor slot 710 can also be represented by other labels, such as a-f.

[0045] As shown in Figure 3 and Figure 4 , in the embodiment, the three-phase winding structure includes three-phase winding lines, and the three-phase winding lines are connected to form a three-phase circuit. For each phase winding line, it is completely wound in the continuous 3 conductor slots 710 when wound on the core piece 700, and is equally spaced by 6 conductor slots 710. At the same time, the winding line of the V phase and the W phase can be obtained by sequentially translating the winding line of the U phase by 6 and 12 conductor slots 710, respectively, and the translation direction can be the clockwise direction of the core piece 700 or the counterclockwise direction of the core piece 700. In the foregoing winding mode, the three-phase winding lines can exactly fill all the 54 conductor slots 710 of the core piece 700; and the number of conductor slots 710 spaced between two adjacent phases is 54 / (3*3) = 6, so that the three-phase winding structure provided in the embodiment can ensure the balance between the three phases and avoid circulating current.

[0046] The winding circuit of each phase can include 2 or 3 winding branches in parallel connection, so that the stator assembly can be suitable for high and low voltage motor products at the same time. When the 2 or 3 winding branches of any phase are wound on the core piece 700, the wire-in positions of the 2 or 3 winding branches are 2 or 3 of the continuous 3 conductor slots 710; at the same time, the wire-out positions of the 2 or 3 winding branches are also 2 or 3 of the continuous 3 conductor slots 710; and the 3 conductor slots 710 corresponding to the wire-in positions and the 3 conductor slots 710 corresponding to the wire-out positions are adjacent along the circumference of the core piece 700, that is, the wire-in positions and the wire-out positions of all winding branches of the three phases are adjacent along the circumference of the core piece 700. Adjacent along the circumference of the core piece 700 specifically means that the angle corresponding to the wire-in positions and the wire-out positions of the three phases along the circumference of the core piece 700 should be less than 180 degrees.

[0047] It can be understood that when the wire-in positions of the 2 or 3 winding branches of any phase in the three-phase winding structure are 2 or 3 of the continuous 3 conductor slots 710, the phase copper bar assembly 500 corresponding to the wire-in positions of the three-phase winding structure can be set to a smaller size; when the wire-out positions of the 2 or 3 winding branches of any phase in the three-phase winding structure are 2 or 3 of the continuous 3 conductor slots 710, the star point copper bar assembly 600 corresponding to the wire-out positions of the three-phase winding structure can be set to a smaller size; when the wire-in positions and the wire-out positions of all winding branches of the three phases are adjacent along the circumference of the core piece 700, the phase copper bar assembly 500 is arranged adjacent to the star point copper bar assembly 600, and then the phase copper bar assembly 500 and the star point copper bar assembly 600 can be led out together to avoid using a longer leading wire.

[0048] In summary, by setting the wire-in positions and the wire-out positions of the 2 or 3 winding branches of any phase in the three-phase winding structure to be 2 or 3 of the continuous 3 conductor slots 710, the size of the phase copper bar assembly 500 and the star point copper bar assembly 600 can be simplified; and by setting the wire-in positions and the wire-out positions of all winding branches of the three phases to be adjacent along the circumference of the core piece 700, the phase copper bar assembly 500 and the star point copper bar assembly 600 can be led out together, thereby solving the problem that the phase copper bar assembly 500 and the star point copper bar assembly 600 are too large in size or too far apart to be led out.

[0049] Specifically, each winding branch adopts a lap winding method.

[0050] As Figure 3 and Figure 4As shown in this embodiment, it is illustrated by way of example that any winding branch adopts a lap winding method. Of course, in some embodiments, any winding branch may also adopt a wave winding, concentric winding, or any combination of at least two winding methods.

[0051] More specifically, each winding branch includes several hairpin coils, each hairpin coil including a lapped coil 100. The lapped coil 100 is used for lapping and includes an effective lapped edge 110, a lapped welding end 120, and a lapped hairpin end 130. There are two effective lapped edges 110, which are respectively spaced apart in two conductor slots 710. The lapped welding end 120 corresponds one-to-one with the effective lapped edge 110. The two lapped welding ends 120 are respectively located at the same end of the two effective lapped edges 110 and extend in a direction that approaches each other. The lapped hairpin end 130 connects to the other end of the two effective lapped edges 110.

[0052] like Figure 4 As shown in this embodiment, the hairpin coil can be integrally formed using a conductor, such as enameled wire. Each winding branch is composed of several hairpin coils connected together, and adjacent hairpin coils can be connected by welding. During winding, the hairpin coil is at least partially disposed within the conductor slot 710. The portion of the hairpin coil disposed within the conductor slot 710 is called the effective side. The effective side of the hairpin coil can be one or two. When the hairpin coil has one effective side, its shape resembles an "I" and can be called an "I-shaped" wire. When the hairpin coil has two effective sides, its shape resembles a "U" and can be called a "U-shaped" wire. The number of conductor slots 710 between the two effective sides of the U-shaped wire is the pitch of the hairpin coil.

[0053] like Figure 4 and Figure 5As shown, the hairpin coil can specifically include a lap winding coil 100 for lap winding according to its shape. The lap winding coil 100 is a U-shaped wire, which includes two lap winding effective edges 110, both of which extend along the axial direction of the core piece 700 and are arranged in the two conductor grooves 710, respectively. The lap winding coil 100 further includes two lap winding welding ends 120, which are arranged at the same end of the two lap winding effective edges 110, respectively, and extend in a direction close to each other. The lap winding coil 100 further includes a lap winding hairpin end 130, which is connected between the other end of the two lap winding effective edges 110, and can be arranged in a shape similar to a "V" letter. When each winding branch is lap-wound, two lap winding coils 100 can be connected, which are connected by one lap winding welding end 120 of each lap winding coil 100, and the two lap winding welding ends 120 can be connected by welding.

[0054] Of course, in some embodiments, each winding branch can also be continuously wound by one or more longer conductors, for example, one conductor can continuously wind one half, two or three lap winding coils 100, etc.

[0055] It can be understood that, by arranging each winding branch as a plurality of hairpin coils and reasonably arranging the shape of the lap winding coil 100, the present embodiment facilitates lap winding of each winding branch, simplifies the winding difficulty of each winding branch, and improves the preparation efficiency of the three-phase winding structure.

[0056] More specifically, the hairpin coil further includes an anti-twist coil 200, and the plurality of lap winding coils 100 are connected to form at least two lap winding groups. The anti-twist coil 200 connects adjacent two lap winding groups, and includes an anti-twist effective edge 210, an anti-twist welding end 220 and an anti-twist hairpin end 230. The anti-twist effective edge 210 is provided with two anti-twist effective edges 210, which are arranged in the two conductor grooves 710, respectively. The anti-twist welding end 220 corresponds to the anti-twist effective edge 210 one by one, and the two anti-twist welding ends 220 are arranged at the same end of the two anti-twist effective edges 210, respectively, and extend in the same direction. The anti-twist hairpin end 230 connects the other end of the two anti-twist effective edges 210.

[0057] As shown in FIG. 2, the anti-twist coil 200 is arranged between the two lap winding coils 100, and the anti-twist welding end 220 of the anti-twist coil 200 is connected to the lap winding welding end 120 of the two lap winding coils 100. Figure 4 and Figure 6As shown, in the embodiment, it is exemplarily explained that when the plurality of the lap winding coils 100 are connected, the lap winding groups are formed. And the hairpin coil can also include the reverse-twisted coil 200 according to the shape thereof, and the two adjacent lap winding groups can be connected through the reverse-twisted coil 200. Similarly, the reverse-twisted coil 200 is a U-shaped wire, which includes two reverse-twisted effective edges 210, two reverse-twisted welding ends 220 and one reverse-twisted hairpin end 230, wherein the two reverse-twisted effective edges 210 are arranged in the two conductor grooves 710 respectively. The two reverse-twisted welding ends 220 are arranged at the same end of the two reverse-twisted effective edges 210 respectively; the difference is that the two reverse-twisted welding ends 220 of the reverse-twisted coil 200 extend in the same direction. And the reverse-twisted hairpin end 230 is connected between the other ends of the two reverse-twisted effective edges 210; similarly, the reverse-twisted hairpin end 230 can also be arranged in a shape similar to a "V" letter. When each winding branch is lap-wound, one reverse-twisted coil 200 can also be connected with two lap winding coils 100, the two reverse-twisted welding ends 220 of the reverse-twisted coil 200 are connected with one lap winding welding end 120 of the two lap winding coils 100 respectively, and the reverse-twisted welding end 220 and the lap winding welding end 120 can still be connected in a welding manner.

[0058] It can be understood that, by connecting the two adjacent lap winding groups through the reverse-twisted coil 200 and reasonably arranging the shape of the reverse-twisted coil 200, the embodiment facilitates the lap winding of each winding branch at the specified position, so as to obtain the required three-phase winding structure.

[0059] More specifically, the hairpin coil further includes an incoming wire 300 and an outgoing wire 400, the incoming wire 300 is used for the incoming of each winding branch, and the outgoing wire 400 is used for the outgoing of each winding branch, the incoming wire 300 includes an incoming effective edge 310, an incoming welding end 320 and an incoming hairpin end 330, the incoming effective edge 310 is arranged in one conductor groove 710, and the incoming welding end 320 and the incoming hairpin end 330 are arranged at the two ends of the incoming effective edge 310. The outgoing wire 400 includes an outgoing effective edge 410, an outgoing welding end 420 and an outgoing hairpin end 430, the outgoing effective edge 410 is arranged in one conductor groove 710, and the outgoing welding end 420 and the outgoing hairpin end 430 are arranged at the two ends of the outgoing effective edge 410.

[0060] As Figure 4 and Figure 7As shown in this embodiment, the hairpin coil, depending on its shape, may further include an inlet wire 300 and an outlet wire 400. Both the inlet wire 300 and the outlet wire 400 are I-shaped wires. The inlet wire 300 includes only one effective inlet edge 310, which is disposed within a conductor groove 710. It also includes an inlet soldering end 320 and an inlet hairpin end 330, which are located at opposite ends of the effective inlet edge 310. Similarly, the outlet wire 400 includes only one effective outlet edge 410, which is disposed within a conductor groove 710. It also includes an outlet soldering end 420 and an outlet hairpin end 430, which are located at opposite ends of the effective outlet edge 410. When each winding branch is lapped, it uses the lead-in wire 300 as the first hairpin coil for input. The lead-in wire 300 can be connected to a lapped coil 100. In this case, the lead-in welding end 320 of the lead-in wire 300 is connected to a lapped welding end 120 of the lapped coil 100, and the connection can be made by welding. At the same time, each winding branch also uses the lead-out wire 400 as the last hairpin coil for output. The lead-out wire 400 can also be connected to a lapped coil 100. In this case, the lead-out welding end 420 of the lead-out wire 400 is connected to a lapped welding end 120 of the lapped coil 100, and the connection can also be made by welding.

[0061] More specifically, when each phase includes two parallel winding branches, the first winding branch of phase U is:

[0062] 1.1-10.2-1.3-10.4-1.5-10.6-20.6-11.5-20.4-11.3-20.2-11.1-2.1-11.2-2.3-11.4-2.5-11.6-21.6-12.5-21.4-12.3-21.2-12.1-21.1-30.2-21.3-30.4-21.5-30.6-37.6-28.5-37.4-28.3-37.2-28.1-37.1-46.2-37.3 -46.4-37.5-46.6-3.6-48.5-3.4-48.3-3.2-48.1-38.1-47.2-38.3-47.4-38.5-47.6;

[0063] The second winding branch of phase U is:

[0064] 2.6-47.5-2.4-47.3-2.2-47.1-3.1-12.2-3.3-12.4-3.5-12.6-19.6-10.5-19.4-10.3-19.2-10.1-19.1-28.2-19.3-28.4-19.5-28.6-38.6-29.5-38.4-2 9.3-38.2-29.1-20.1-29.2-20.3-29.4-20.5-29.6-39.6-30.5-39.4-30.3-39.2-30.1-39.1-48.2-39.3-48.4-39.5-48.6-1.6-46.5-1.4-46.3-1.2-46.1;

[0065] When each phase includes 3 parallel winding branches, the first winding branch of phase U is:

[0066] 1.1-10.2-1.3-10.4-1.5-10.6-20.6-11.5-20.4-11.3-20.2-11.1-21.1-30.2-21.3-30.4-21.5-30.6-37.6-28.5-37.4-28.3-37.2-28.1-38.1-47.2-38.3-47.4-38.5-47.6-3.6-48.5-3.4-48.3-3.2-48.1;

[0067] The second winding branch of phase U is:

[0068] 2.1-11.2-2.3-11.4-2.5-11.6-21.6-12.5-21.4-12.3-21.2-12.1-19.1-28.2-19.3-28.4-19.5-28.6-38.6-29.5-38.4-29.3-38.2-29.1-39.1-48.2-39.3-48.4-39.5-48.6-1.6-46.5-1.4-46.3-1.2-46.1;

[0069] The third winding branch of phase U is:

[0070] 3.1-12.2-3.3-12.4-3.5-12.6-19.6-10.5-19.4-10.3-19.2-10.1-20.1-29.2-20.3-29.4-20.5-29.6-39.6-30.5-39.4-30.3-39.2-30.1-37.1-46.2-37.3-46.4-37.5-46.6-2.6-47.5-2.4-47.3-2.2-47.1.

[0071] As shown in Figure 1 and Figure 4 In this embodiment, the 54 conductor grooves 710 on the core piece 700 are exemplarily indicated by the serial numbers "1"-"54", and any conductor groove 710 on the core piece 700 can be the conductor groove 710 with the serial number "1". It should be noted that the serial numbers "1"-"54" are only for the convenience of description of the 54 conductor grooves 710, and do not limit the 54 conductor grooves 710. In some embodiments, the 54 conductor grooves 710 can also be indicated by other marks.

[0072] In the following, the first winding branch of the U phase is taken as an example for description when each phase of the three-phase winding structure includes 3 parallel winding branches.

[0073] As shown in Figure 4 , the line corresponding to "1.1" represents the first hairpin coil of the first winding branch of the U phase, which is specifically the lead-in wire 300, and the lead-in effective edge 310 of which is arranged in the groove layer 1 of the conductor groove 710 with the serial number "1". At the same time, it indicates that the first winding branch of the U phase is connected to the groove layer 1 of the conductor groove 710 with the serial number "1", refer to U1 in Figure 4 . The line corresponding to "10.2-1.3" represents the second hairpin coil of the first winding branch of the U phase, which is specifically the lap winding coil 100, and the two lap winding effective edges 110 of which are arranged in the groove layer 2 of the conductor groove 710 with the serial number "10" and the groove layer 3 of the conductor groove 710 with the serial number "1", respectively. The subsequent winding lines are the same, the line corresponding to "10.6-20.6" represents the first reverse-twisted coil 200 in the first winding branch of the U phase, and the two reverse-twisted effective edges 210 of which are arranged in the groove layer 6 of the conductor groove 710 with the serial number "10" and the groove layer 6 of the conductor groove 710 with the serial number "20", respectively, and it is connected to the lap winding group represented by the lines corresponding to "10.2-1.3-10.4-1.5" and "11.5-20.4-11.3-20.2"; and the lines corresponding to "11.1-2.1", "11.6-21.6", "12.1-21.1", etc. all represent a reverse-twisted coil 200. The line corresponding to "47.6" represents the last hairpin coil of the first winding branch of the U phase, which is the lead-out wire 400, and the lead-out effective edge 410 of which is arranged in the groove layer 6 of the conductor groove 710 with the serial number "47"; at the same time, it indicates that the first winding branch of the U phase is connected to the groove layer 6 of the conductor groove 710 with the serial number "47", refer to X1 in Figure 4 .

[0074] As shown in Figure 4As shown, the second winding branch of phase U is similar. The line corresponding to "2.6" represents the lead-in line 300 of the second winding branch of phase U, whose effective lead-in edge 310 is located within the slot layer 6 of conductor slot 710 (number "2"). Simultaneously, it indicates that the second winding branch of phase U enters through slot layer 6 of conductor slot 710 (number "2"). (Refer to...) Figure 4 In U2, “46.1” corresponds to the lead-out line 400 of the second winding branch of phase U, whose effective lead-out edge 410 is located in the slot layer 1 of conductor slot 710 with serial number “46”; at the same time, it indicates that the second winding branch of phase U enters through the slot layer 1 of conductor slot 710 with serial number “46”, as shown in the reference. Figure 4 X2 in the middle. It is not difficult to see that U1 and U2 are wound in two of the three consecutive conductor slots 710 numbered "1" to "3", and X1 and X2 are wound in two of the three consecutive conductor slots 710 numbered "46" to "48".

[0075] like Figure 3 As shown, in this embodiment, the winding lines of phases V and W can be obtained by sequentially shifting the winding line of phase U by 6 and 12 conductor slots 710 along the direction of increasing conductor slot number 710, respectively. Therefore, the entry position of the first winding branch of phase V can be the lead-in line 300 represented by the line corresponding to "7.1", referring to... Figure 3 In V1, the outgoing line position of the first winding branch of phase V can be the lead-out line 400 represented by the line corresponding to "53.6", refer to... Figure 3 The entry point of the second winding branch of phase Y1 in the V phase can be the lead-in line 300 represented by the line corresponding to "8.6", referring to... Figure 3 In V2, the output position of the second winding branch of phase V can be the lead-out line 400 represented by the line corresponding to "52.1", referring to... Figure 3 Y2 in the diagram. The entry point of the first winding branch of phase W can be the lead-in line 300 represented by the line corresponding to "13.1", referring to... Figure 3 In W1, the outgoing line position of the first winding branch of phase W can be the lead-out line 400 represented by the line corresponding to "5.6", refer to... Figure 3 In Z1, the entry point of the second winding branch of phase W can be the lead-in line 300 represented by the line corresponding to "14.6", referring to... Figure 3 In W2, the output position of the second winding branch of phase W can be the lead-out line 400 represented by the line corresponding to "4.1", refer to... Figure 3 Z2 in the middle. It is not difficult to see that U1, U2, V1, V2, W1 and W2 are adjacent to X1, X2, Y1, Y2, Z1 and Z2 along the circumference of the iron core 700.

[0076] As Figure 8 shown, and the first, second and third winding branches of the U phase are similarly obtained when each phase includes 3 parallel winding branches. The entry position of the first winding branch of the U phase can be the lead-in line 300 represented by the line corresponding to "1.1", referring to U1' in Figure 8 , and the exit position of the first winding branch of the U phase can be the lead-out line 400 represented by the line corresponding to "48.1", referring to X1' in Figure 8 . The entry position of the second winding branch of the U phase can be the lead-in line 300 represented by the line corresponding to "2.1", referring to U2' in Figure 8 , and the exit position of the second winding branch of the U phase can be the lead-out line 400 represented by the line corresponding to "46.1", referring to X2' in Figure 8 . The entry position of the third winding branch of the U phase can be the lead-in line 300 represented by the line corresponding to "3.1", referring to U3' in Figure 8 , and the exit position of the third winding branch of the U phase can be the lead-out line 400 represented by the line corresponding to "47.1", referring to X3' in Figure 8 . Similarly, it is not difficult to see that U1, U2 and U3 are wound in the consecutive 3 conductor slots 710 with serial numbers "1"-"3", and X1, X2 and X3 are wound in the consecutive 3 conductor slots 710 with serial numbers "46"-"48".

[0077] As Figure 8 shown, similarly, the winding lines of the V and W phases can also be obtained by translating the winding lines of the U phase by 6 and 12 conductor slots 710 in the direction of increasing serial numbers of the conductor slots 710, respectively. The entry position of the first winding branch of the V phase can be the lead-in line 300 represented by the line corresponding to "7.1", referring to V1' in Figure 8 , and the exit position of the first winding branch of the V phase can be the lead-out line 400 represented by the line corresponding to "54.1", referring to Y1' in Figure 8 . The entry position of the second winding branch of the V phase can be the lead-in line 300 represented by the line corresponding to "8.1", referring to V2' in Figure 8 , and the exit position of the second winding branch of the V phase can be the lead-out line 400 represented by the line corresponding to "52.1", referring to Y2' in Figure 8 . The entry position of the third winding branch of the V phase can be the lead-in line 300 represented by the line corresponding to "9.1", referring to V3' in Figure 8 , and the exit position of the third winding branch of the V phase can be the lead-out line 400 represented by the line corresponding to "53.1", referring to Y3' in Figure 8Y3' in FIG. 6. The incoming line position of the first winding branch of the W phase can be the incoming line 300 represented by the line corresponding to "13.1", referring to FIG. 6. Figure 8 W1' in FIG. 6, and the outgoing line position of the first winding branch of the W phase can be the outgoing line 400 represented by the line corresponding to "6.1", referring to FIG. 6. Figure 8 Z1' in FIG. 6. The incoming line position of the second winding branch of the W phase can be the incoming line 300 represented by the line corresponding to "14.1", referring to FIG. 6. Figure 8 W2' in FIG. 6, and the outgoing line position of the second winding branch of the W phase can be the outgoing line 400 represented by the line corresponding to "4.1", referring to FIG. 6. Figure 4 Z2' in FIG. 6. The incoming line position of the third winding branch of the W phase can be the incoming line 300 represented by the line corresponding to "15.1", referring to FIG. 6. Figure 9 W3' in FIG. 6, and the outgoing line position of the third winding branch of the W phase can be the outgoing line 400 represented by the line corresponding to "5.1", referring to FIG. 6. Figure 10 Z3' in FIG. 6. It can be seen that U1', U2', U3', V1', V2', V3', W1', W2' and W3' are adjacent to X1', X2', X3', Y1', Y2', Y3', Z1', Z2' and Z3' in the circumferential direction of the core member 700.

[0078] Specifically, the three-phase winding structure further comprises a phase copper bar assembly 500 corresponding to each of the three phases of the stator assembly, the phase copper bar assembly 500 comprising a first copper bar member 510 and first terminals 520 corresponding to and connected to the incoming line positions of the two or three winding branches of the phase corresponding to the phase copper bar assembly 500, and the first copper bar member 510 connecting the two or three first terminals 520.

[0079] As Figure 4 , Figure 9 and Figure 11As shown, in the embodiment, it is exemplarily illustrated that the phase copper bar assembly 500 is used to connect with the entry line positions of each winding branch of the three-phase winding structure, so as to parallel each winding branch of each phase of the three-phase winding structure. The phase copper bar assembly 500 is provided in three, and corresponds to the three phases of the three-phase winding structure one by one, for example, the phase copper bar assembly 500 corresponding to the winding line of the U phase can be referred to as the U phase phase copper bar assembly 500. The phase copper bar assembly 500 can include a first copper bar piece 510 and a first terminal 520, and the first copper bar piece 510 and the first terminal 520 can be integrally formed. The first terminal 520 corresponds to and connects with the entry line positions of each winding branch of the phase one by one, for example, when the winding line of the U phase includes two winding branches, the first terminal 520 of the U phase phase copper bar assembly 500 is provided in two, and corresponds to and connects with the entry line positions of the two winding branches one by one, and the connection mode can be welding. The first copper bar piece 510 can be provided in an arc shape, and at least partially extends along the circumferential direction of the core piece 700; the first copper bar piece 510 connects each first terminal 520 of the phase copper bar assembly 500. The phase copper bar assembly 500 can also extend along the axial direction of the core piece 700 away from the end connected with the entry line positions of each winding branch, and is connected with a braided wire or the like, so as to be led out; and the three phase copper bar assemblies 500 are close to each other when extending, so as to concentrate the outgoing lines; meanwhile, the three phase copper bar assemblies 500 are provided in a spaced manner, so as to avoid short circuit.

[0080] Specifically, the three-phase winding structure further includes a star point copper bar assembly 600, the star point copper bar assembly 600 includes a second copper bar piece 610 and a second terminal 620, the second terminal 620 corresponds to and connects with the outgoing line positions of six or nine winding branches of the three phases one by one, and the second copper bar piece 610 connects the six or nine second terminals 620.

[0081] As Figure 1 , ​ and ​As shown, in the embodiment, the star point copper bar assembly 600 is used to connect with the outgoing line positions of each winding branch of the three-phase winding structure to form a three-phase circuit. The star point copper bar assembly 600 can be provided as one, which can specifically include a second copper bar piece 610 and a second terminal 620. The second copper bar piece 610 and the second terminal 620 can be provided in one piece. The second terminal 620 is connected with the outgoing line positions of each winding branch of the winding lines of the three phases one by one. For example, when the winding line of the U phase includes two winding branches, the second terminal 620 of the star point copper bar assembly 600 is provided as six, and is connected with the outgoing line positions of the six winding branches of the winding branches of the three phases one by one. The connection mode can also be welding. The second copper bar piece 610 can be provided in an arc shape, and at least partially extends along the circumference of the core piece 700. The second copper bar piece 610 connects all the second terminals 620. The end of the star point copper bar assembly 600 away from the connection with the outgoing line positions of each winding branch can also extend along the axial direction of the core piece 700 and be connected with a braided cord or the like to facilitate the outgoing thereof. When the star point copper bar assembly 600 extends, it can also be close to the three-phase copper bar assembly 500 to be led out at the same time as the three-phase copper bar assembly 500. For example, the star point copper bar assembly 600 can be connected with the outgoing line positions of each winding branch of the three-phase winding structure through a plurality of second terminals 620. The second terminals 620 can be provided in an arc shape, and at least partially extend along the circumference of the core piece 700. The second terminals 620 can be connected with the outgoing line positions of each winding branch of the winding lines of the three phases one by one. For example, when the winding line of the U phase includes two winding branches, the second terminal 620 of the star point copper bar assembly 600 is provided as six, and is connected with the outgoing line positions of the six winding branches of the winding branches of the three phases one by one. The connection mode can also be welding. The second terminals 620 of the star point copper bar assembly 600 can be connected with the outgoing line positions of each winding branch of the three-phase winding structure through a plurality of second terminals 620. The second terminals 620 can be provided in an arc shape, and at least partially extend along the circumference of the core piece 700. The second terminals 620 can be connected with the outgoing line positions of each winding branch of the winding lines of the three phases one by one. For example, when the winding line of the U phase includes two winding branches, the second terminal 620 of the star point copper bar assembly 600 is provided as six, and is connected with the outgoing line positions of the six winding branches of the winding branches of the three phases one by one. The connection mode can also be welding. ​ As shown, the star point copper bar assembly 600 and the three-phase copper bar assembly 500 can also be connected as one through injection molding material to form an integrated busbar assembly.

[0082] The implementation principle of the three-phase winding structure provided by the embodiment of the application is as follows:

[0083] In the preparation of the stator assembly, a plurality of punching sheets are first laminated into a core piece 700, and then a plurality of hairpin coils are wound on the core piece 700. In the winding process, each winding branch is connected with the incoming line 300 for incoming, the lamination coil 100 for lamination, the reverse twist coil 200 for connecting adjacent two lamination groups, and the outgoing line 400 for outgoing. Subsequently, the three-phase copper bar assembly 500 is connected with the incoming line positions of each winding branch of the winding lines of the three phases, and the star point copper bar assembly 600 is connected with the outgoing line positions of each winding branch of the winding lines of the three phases to form a three-phase winding structure, and the three-phase winding structure is wound on the core piece 700.

[0084] The application can simplify the size of the phase copper bar assembly 500 and the star point copper bar assembly 600 by setting the wire-in position and the wire-out position of 2 or 3 winding branches of any phase in the three-phase winding structure in 2 or 3 conductor slots 710; and the application can lead out the phase copper bar assembly 500 and the star point copper bar assembly 600 together by setting the wire-in position and the wire-out position of all winding branches of three phases along the adjacent core piece 700, thereby solving the problem that the phase copper bar assembly 500 and the star point copper bar assembly 600 are not convenient to lead out due to the large size or the long distance between the phase copper bar assembly 500 and the star point copper bar assembly 600.

[0085] Embodiment two

[0086] The embodiment two of the application provides a stator assembly, which comprises any three-phase winding structure provided by the application.

[0087] Embodiment three

[0088] The embodiment three of the application provides an electric machine, which comprises any stator assembly provided by the application.

[0089] The technical features of the above embodiments can be combined in any manner, and to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the description.

[0090] The above embodiments only express several implementation manners of the application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A three-phase winding structure, characterized in that, The three-phase winding structure is used in the stator assembly, which has three phases: U-phase, V-phase, and W-phase. The stator assembly has six poles and also includes a core (700) with 54 circumferentially arranged conductor slots (710). Each conductor slot (710) includes six slot layers. The three-phase winding structure includes three phase winding lines, each phase winding line being completely wound within three consecutive conductor slots (710) and evenly spaced. The winding lines of the V phase and the W phase are obtained by sequentially shifting the winding lines of the U phase by 6 and 12 conductor slots (710) respectively, with each phase winding line including 2 or 3 parallel winding branches. The entry and exit positions of the 2 or 3 winding branches of each phase are 2 or 3 of the 3 consecutive conductor slots (710), and the entry and exit positions of a total of 6 or 9 winding branches of the three phases are adjacent along the circumference of the core (700).

2. The three-phase winding structure according to claim 1, characterized in that, Each winding branch uses a lap winding method.

3. The three-phase winding structure according to claim 2, characterized in that, Each winding branch includes several hairpin coils, each hairpin coil including a lapped coil (100). The lapped coil (100) is used for lapping and includes a lapped effective side (110), a lapped welding end (120), and a lapped hairpin end (130). There are two lapped effective sides (110), which are respectively spaced in the two conductor slots (710). The lapped welding end (120) corresponds one-to-one with the lapped effective side (110). The two lapped welding ends (120) are respectively located at the same end of the two lapped effective sides (110) and extend in a direction that is close to each other. The lapped hairpin end (130) is connected to the other end of the two lapped effective sides (110).

4. The three-phase winding structure according to claim 3, characterized in that, The hairpin coil also includes a reverse twist coil (200). Several of the stacked coils (100) are connected to form at least two stacked winding groups. The reverse twist coil (200) connects two adjacent stacked winding groups. The reverse twist coil (200) includes a reverse twist effective side (210), a reverse twist welding end (220), and a reverse twist hairpin end (230). Two reverse twist effective sides (210) are provided and are respectively spaced in two conductor slots (710). The reverse twist welding end (220) corresponds one-to-one with the reverse twist effective side (210). The two reverse twist welding ends (220) are respectively provided at the same end of the two reverse twist effective sides (210) and extend in the same direction. The reverse twist hairpin end (230) is connected to the other end of the two reverse twist effective sides (210).

5. The three-phase winding structure according to claim 4, characterized in that, The hairpin coil also includes an input wire (300) and an output wire (400). The input wire (300) is used for the input of each winding branch, and the output wire (400) is used for the output of each winding branch. The input wire (300) includes an effective input edge (310), an input welding end (320), and an input hairpin end (330). The effective input edge (310) is disposed within one of the conductor grooves (710). (320) and the lead-in hairpin end (330) are disposed at both ends of the lead-in effective edge (310). The lead-out line (400) includes the lead-out effective edge (410), the lead-out welding end (420) and the lead-out hairpin end (430). The lead-out effective edge (410) is disposed in a conductor groove (710). The lead-out welding end (420) and the lead-out hairpin end (430) are disposed at both ends of the lead-out effective edge (410).

6. The three-phase winding structure according to claim 1, characterized in that, When each phase includes two parallel winding branches, the first winding branch of the U phase is: 1.1-10.2-1.3-10.4-1.5-10.6-20.6-11.5-20.4-11.3-20.2-11.1-2.1-11.2-2.3-11.4-2.5-11.6-21.6-12.5-21.4-12.3-21.2-12.1-21.1-30.2-21.3-30.4-21.5-30.6-37.6-28.5-37.4-28.3-37.2-28.1-37.1-46.2-37.3 -46.4-37.5-46.6-3.6-48.5-3.4-48.3-3.2-48.1-38.1-47.2-38.3-47.4-38.5-47.6； The second winding branch of the U phase is: 2.6-47.5-2.4-47.3-2.2-47.1-3.1-12.2-3.3-12.4-3.5-12.6-19.6-10.5-19.4-10.3-19.2-10.1-19.1-28.2-19.3-28.4-19.5-28.6-38.6-29.5-38.4-29.3-38.2-29.1-20.1-29.2-20.3-29.4-20.5-29.6-39.6-30.5-39.4-30.3-39.2-30.1-39.1-48.2-39.3-48.4-39.5-48.6-1.6-46.5-1.4-46.3-1.2-46.1； When each phase includes 3 parallel winding branches, the first winding branch of the U phase is: 1.1-10.2-1.3-10.4-1.5-10.6-20.6-11.5-20.4-11.3-20.2-11.1-21.1-30.2-21.3-30.4-21.5-30.6-37.6-28.5-37.4-28.3-37.2-28.1-38.1-47.2-38.3-47.4-38.5-47.6-3.6-48.5-3.4-48.3-3.2-48.1； The second winding branch of the U phase is: 2.1-11.2-2.3-11.4-2.5-11.6-21.6-12.5-21.4-12.3-21.2-12.1-19.1-28.2-19.3-28.4-19.5-28.6-38.6-29.5-38.4-29.3-38.2-29.1-39.1-48.2-39.3-48.4-39.5-48.6-1.6-46.5-1.4-46.3-1.2-46.1； The third winding branch of the U phase is: 3.1-12.2-3.3-12.4-3.5-12.6-19.6-10.5-19.4-10.3-19.2-10.1-20.1-29.2-20.3-29.4-20.5-29.6-39.6-30.5-39.4-30.3-39.2-30.1-37.1-46.2-37.3-46.4-37.5-46.6-2.6-47.5-2.4-47.3-2.2-47.1。 7. The three-phase winding structure according to claim 1, characterized in that, The three-phase winding structure also includes a phase copper busbar assembly (500), which corresponds one-to-one with the three phases of the stator assembly. The phase copper busbar assembly (500) includes a first copper busbar component (510) and a first terminal (520). The first terminal (520) corresponds one-to-one with and is connected to the input positions of two or three winding branches of the phase corresponding to the phase of the phase copper busbar assembly (500). The first copper busbar component (510) connects two or three of the first terminals (520).

8. The three-phase winding structure according to claim 1, characterized in that, The three-phase winding structure also includes a star-point copper busbar assembly (600), which includes a second copper busbar component (610) and a second terminal (620). The second terminal (620) corresponds to and is connected to the output positions of a total of 6 or 9 winding branches of the three phases. The second copper busbar component (610) connects to 6 or 9 of the second terminals (620).

9. A stator assembly, characterized in that, The stator assembly includes the three-phase winding structure as described in any one of claims 1-8.

10. An electric motor, characterized in that, The motor includes the stator assembly as described in claim 9.

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