CN220234314U

CN220234314U - Lap winding structure, stator assembly and motor

Info

Publication number: CN220234314U
Application number: CN202321574969.0U
Authority: CN
Inventors: 叶银一; 李志华; 张帅
Original assignee: Chongqing Jinkang Power New Energy Co Ltd
Current assignee: Chongqing Jinkang Power New Energy Co Ltd
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2023-12-22
Anticipated expiration: 2033-06-20

Abstract

The application relates to the technical field of motors, in particular to a lap winding structure, a stator assembly and a motor, wherein the number of poles of the stator assembly is 4, the number of phases of the stator assembly is three, a stator core is provided with 60 conductor slots, the lap winding structure comprises three winding circuits of three phases, and each winding circuit of each phase is provided with two winding modes; in the first winding mode, each winding line of each phase comprises 2 parallel branches; in the second winding mode, the winding line of each phase comprises only 1 branch; in two winding modes, each branch comprises a lead-in wire, a lead-out wire, at least one second coil and a plurality of first coils. The winding method adopts two winding modes, so that the winding circuit of the three-phase lap winding structure of the 60-slot 4-pole is shorter, and the material consumption is less, thereby improving the economical efficiency; or obtain bigger power to improve the dynamic property thereof, thereby achieving the purpose of matching different requirements of the 60-slot 4-pole three-phase lap winding structure in the preparation and use processes.

Description

Lap winding structure, stator assembly and motor

Technical Field

The application relates to the technical field of motors, in particular to a lap winding structure, a stator assembly and a motor.

Background

The motor, as its name implies, is an electrical power element that converts electrical energy and mechanical energy into each other. When the electric energy is converted into mechanical energy, the electric machine shows the working characteristics of the electric motor, and when the mechanical energy is converted into electric energy, the electric machine shows the working characteristics of the electric generator.

The motor comprises a rotor assembly and a stator assembly, wherein the stator assembly is fixedly arranged, and the rotor assembly is rotatably arranged in the stator assembly. The stator assembly comprises a stator core and a winding structure wound on the stator core. The winding structure may include a lap winding structure, i.e., a winding structure wound in a lap winding manner, according to a winding manner of the winding structure on the stator core.

For motors of the same model, the lap winding structure is generally difficult to meet the complex and changeable requirements of the motor due to a single winding mode, for example, a three-phase lap winding structure with 60 slots and 4 poles is suitable for motors, and different requirements for pursuing economy and dynamic performance exist in the processes of preparation and use, and if the winding mode is single, the requirements are difficult to match.

Disclosure of Invention

Based on this, the present application provides a lap winding structure, a stator assembly and a motor to improve the problem that the three-phase lap winding structure of 60 slots and 4 poles in the prior art is difficult to match with different requirements of economy and dynamic performance.

In a first aspect, the present application provides a lap winding structure, the lap winding structure is suitable for a stator assembly, the number of poles of the stator assembly is 4, the number of phases is three, the stator assembly further includes a stator core, 60 conductor slots are arranged on the stator core at equal intervals along the circumferential direction of the stator core, the lap winding structure includes three winding lines of phases, and each winding line of the phases has two winding modes;

in the first winding mode, the conductor slot comprises 8 slot layers, and each winding line of each phase comprises 2 parallel branches;

in the second winding mode, the conductor slot comprises 6 slot layers, and each winding circuit of each phase comprises only 1 branch circuit;

in two kinds of coiling modes, every branch road all includes lead-in wire, lead-out wire, at least one second coil and a plurality of first coil, the lead-in wire is used as the coiling initial position of every branch road, and includes and draws in effective limit, the lead-out wire is used as the coiling extreme position of every branch road, and including drawing out effective limit, a plurality of first coil is used as lap-winding, and is formed with two at least lap-windings, first coil includes two parallel and the first effective limit that the interval set up, the second coil with two first coil are connected, and be used for adjacent two lap-windings, the second coil includes two parallel and the second effective limit that the interval set up, draw in effective limit, draw out effective limit, first effective limit and second effective limit set up respectively in a groove layer of conductor groove.

In one embodiment, the first coil further includes a first welding end and a first hairpin end, where the first hairpin end is connected with two first effective sides and is disposed at the same end of the two first effective sides, the first welding ends are disposed at two ends of the two first effective sides, and the two first welding ends are disposed at the other ends of the two first effective sides respectively and extend along directions close to each other.

In one embodiment, the second coil further includes a second welding end and a second hairpin end, where the second hairpin end is connected to two second effective sides and is disposed at the same end of the two second effective sides, the second welding ends are two, and the two second welding ends are respectively disposed at the other ends of the two second effective sides and extend along the same direction.

In one embodiment, the first coils of each branch have three pitches, and the second coils have only one pitch, and in two winding modes, the three pitches of the first coils are the same, and the pitches of the second coils are the same.

In one embodiment, in the first winding manner, the 8 slot layers of the conductor slot are a, b, c, d, e, f, g and h slot layers respectively, the first coil has three pitches of 11 slots, 12 slots and 13 slots, the second coil has a pitch of 15 slots, and the three phases are U, V and W phases respectively;

the first branch of the U phase is as follows:

1h-13g-2h-14g-3h-15g-4h-16g-5h-17g-5f-17e-4f-16e-3f-15e-2f-1 4e-1f-13e-1d-13c-2d-14c-3d-15c-4d-16c-5d-17c-5b-17a-4b-16a-3b-15a-2b-14a-1b-13a-28a-16b-29a-17b-30a-18b-31a-19b-32a-20b-32c-20d-31c-19d-30c-18d-29c-17d-28c-16d-28e-16f-29e-17f-30e-18f-31e-19f-32e-20f-32g-20h-31g-19h-30g-18h-29g-17h-28g-16h；

the second branch of the U phase is obtained by translating 30 conductor slots along the direction of increasing the serial number of the conductor slots by the first branch of the U phase;

and the winding lines of the V phase and the W phase are sequentially shifted by 10 and 20 conductor grooves along the increasing direction of the sequence numbers of the conductor grooves by the winding lines of the U phase.

In one embodiment, in the second winding manner, the 6 slot layers of the conductor slot are a, b, c, d, e and f slot layers respectively, the first coil has three pitches of 11 slots, 12 slots and 13 slots, the second coil has a pitch of 15 slots, and the three phases are U, V and W phases respectively;

the first branch of the U phase is as follows:

1f-13e-2f-14e-3f-15e-4f-16e-5f-17e-5d-17c-4d-16c-3d-15c-2d-14c-1d-13c-1b-13a-2b-14a-3b-15a-4b-16a-5b-17a-32a-20b-31a-19b-30a-18b-29a-17b-28b-16a-28c-16d-29c-17d-30c-18d-31c-19d-32c-20d-32e-20f-31e-19f-30e-18f-29e-17f-28e-16f-31f-43e-32f-44e-33f-45e-34f-46e-35f-47e-35d-47c-34d-46c-33d-45c-32d-44c-31d-43c-31b-43a-32b-44a-33b-45a-34b-46a-35b-47a-2a-50b-1a-49b-60a-48b-59a-47b-58a-4 6b-58c-46d-59c-47d-60c-48d-1c-49d-2c-50d-2e-50f-1e-49f-60e-48f-59e-47f-58e-46f；

In one embodiment, the lap winding structure further includes star point copper bars, the number of the star point copper bars corresponds to the number of branches of each phase, and the star point copper bars are connected with winding end positions of the corresponding branches of the three phases.

In one embodiment, in the first winding manner, the lap winding structure further includes three phase copper bars, the three phase copper bars are respectively corresponding to the three phases, and the phase copper bars are connected with winding starting positions of 2 branches of the corresponding phases.

In a second aspect, the present application provides a stator assembly comprising any one of the lap winding structures provided herein.

In a third aspect, the present application provides an electric machine comprising any one of the stator assemblies provided herein.

According to the method, the lap winding structure is wound on the stator iron cores with different slot layers of the conductor slots in two winding modes, so that the winding circuit of the three-phase lap winding structure with 60 slots and 4 poles is shorter, the material consumption is less, and the economical efficiency of the lap winding structure is improved; or obtain bigger power to improve the dynamic property thereof, thereby achieving the purpose of matching different requirements of the 60-slot 4-pole three-phase lap winding structure in the preparation and use processes.

Drawings

Fig. 1 is a schematic structural diagram of a lap winding structure according to a first embodiment of the present application in a second winding manner;

fig. 2 is a schematic structural diagram of a lap winding structure according to a first embodiment of the present application in a first winding manner;

FIG. 3 is a schematic diagram of a slot layer of a conductor slot when the lap winding structure provided in the first embodiment of the present application adopts a second winding mode;

FIG. 4 is a schematic diagram of a slot layer of a conductor slot when the lap winding structure provided in the first embodiment of the present application adopts a first winding mode;

fig. 5 is a schematic winding diagram of the lap winding structure according to the first embodiment of the present application when a second winding mode is adopted;

fig. 6 is a schematic winding diagram of the lap winding structure according to the first embodiment of the present application when a first winding mode is adopted;

fig. 7 is a schematic structural diagram of a first coil of a lap winding structure according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a second coil of a lap winding structure according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a lead-in wire or a lead-out wire of a lap winding structure according to the first embodiment of the present application;

fig. 10 is a winding schematic diagram of a U-phase when the lap winding structure provided in the first embodiment of the present application adopts the second winding mode;

fig. 11 is a winding schematic diagram of a U-phase when the lap winding structure provided in the first embodiment of the present application adopts a first winding manner.

Reference numerals: 100. a lap winding structure; 110. a lead-in wire; 111. introducing an effective edge; 112. introducing a welding end; 113. introducing a card issuing end; 120. a lead-out wire; 121. leading out an effective edge; 122. leading out a welding end; 123. leading out a card issuing end; 130. a second coil; 131. a second active edge; 132. a second welding end; 133. the second card issuing end; 140. a first coil; 141. a first active edge; 142. a first welding end; 143. a first card sending end; 150. a lap winding; 160. star point copper bars; 170. phase copper bars; 200. a stator core; 210. a conductor slot.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that the illustrations provided in the present embodiment are merely schematic illustrations of the basic idea of the present utility model.

The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are particularly adapted to the specific details of construction and the use of the utility model, without departing from the spirit or essential characteristics thereof, which fall within the scope of the utility model as defined by the appended claims.

References in this specification to orientations or positional relationships as "upper", "lower", "left", "right", "intermediate", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc., are based on the orientation or positional relationships shown in the drawings, are also for convenience of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

The first embodiment of the present application provides a lap winding structure 100, where the lap winding structure 100 is suitable for a stator assembly, the number of poles of the stator assembly is 4, the number of phases is three, the stator assembly further includes a stator core 200, 60 conductor slots 210 are provided on the stator core 200 at equal intervals along the circumferential direction of the stator core, the lap winding structure 100 includes three winding lines of each phase, and the winding line of each phase has two winding modes;

in the first winding mode, the conductor slot 210 includes 8 slot layers, and each winding line of each phase includes 2 parallel branches;

in the second winding mode, the conductor slot 210 includes 6 slot layers, and the winding line of each phase includes only 1 branch;

in both winding modes, each branch includes a lead-in wire 110, a lead-out wire 120, at least one second coil 130 and a plurality of first coils 140, the lead-in wire 110 is used as a winding start position of each branch and includes a lead-in effective side 111, the lead-out wire 120 is used as a winding end position of each branch and includes a lead-out effective side 121, the plurality of first coils 140 are used as lap windings and at least two lap windings 150 are formed, the first coils 140 include two parallel and spaced first effective sides 141, the second coils 130 are connected with the two first coils 140 and are used for two adjacent lap windings 150, the second coils 130 include two parallel and spaced second effective sides 131, and the lead-in effective sides 111, the lead-out effective sides 121, the first effective sides 141 and the second effective sides 131 are respectively disposed in one slot layer of the conductor slot 210.

As shown in fig. 1 and 2, in the present embodiment, the stator assembly is exemplarily illustrated to include a lap winding structure 100 and a stator core 200, and the lap winding structure 100 is wound on the stator core 200 and is at least partially disposed in a conductor slot 210. Since the lap winding structure 100 is wound in the conductor slots 210 having different numbers of slot layers in the two winding methods, the stator core 200 employed in the two winding methods has different structures. The same applies to the two winding modes, that is, the total number of the conductor slots 210 of the stator core 200 is the same, namely, 60 slots; the number of poles is the same, i.e. 4 poles or 2 pairs of poles. The stator core 200 may be formed by stacking a plurality of stator laminations in an axial direction, and is hollow and cylindrical and includes an inner side near the axis and an outer side far from the axis. The conductor slots 210 are provided inside the stator core 200, and 60 conductor slots 210 are provided at equal intervals in the circumferential direction of the stator core 200. Each slot layer of conductor slots 210 may be used to arrange an active edge, which may be the lead-in active edge 111, the lead-out active edge 121, the first active edge 141, or the second active edge 131.

As shown in fig. 3 and 6, the stator assembly has three phases, and the lap winding structure 100 includes three phases of wound wire. In the first winding mode, each phase winding line comprises 2 branches, and the 2 branches are connected in parallel; the number of slot layers of the conductor slots 210 of the stator core 200 employed is 8. In the second winding mode, the winding line of each phase only comprises 1 branch, namely, the winding line of each phase is one; the number of slot layers of the conductor slots of the stator core 200 employed is 6.

And for each branch, a lap winding mode is adopted. The first coils 140 are used for lap winding, a plurality of first coils 140 are arranged, and at least two lap windings 150 are formed when the plurality of first coils 140 lap winding. And adjacent two lap windings 150 are connected by the second coil 130, so that the second coil 130 is provided with at least one. In the lap winding process, each branch takes the lead-in wire 110 as a winding starting position and the lead-out wire 120 as a winding end position. The first coil 140 and the second coil 130 each include two effective sides, namely a first effective side 141 and a second effective side 131; the lead-in wire 110 and the lead-out wire 120 then comprise only one active side, i.e. the lead-in active side 111 and the lead-out active side 121, respectively. According to the foregoing, the first effective edge 141, the second effective edge 131, the leading effective edge 111, and the trailing effective edge 121 are disposed in the conductor slot 210 and are located in one of the slot layers of the conductor slot 210.

It can be understood that when the lap winding structure 100 adopts the first winding mode, the winding line of each phase only includes 1 branch, and the stator core 200 used for winding the lap winding structure 100 has only 6 slot layers in the conductor slots 210, so that the lap winding structure 100 has shorter winding line and less material, thereby achieving the purposes of reducing the processing cost and improving the economy thereof; when the lap winding structure 100 adopts the second winding mode, the winding circuit of each phase includes 2 parallel branches, and the line resistance of each phase is reduced due to the increase of the number of the branches of each phase, and under the same voltage, the larger the current is, the larger the power of the lap winding structure 100 is, so that the purpose of improving the dynamic property of the lap winding structure can be achieved.

In summary, by winding the lap winding structure 100 on the stator core 200 with different slot layers of the conductor slots 210 in two winding manners, the winding circuit of the three-phase lap winding structure 100 with 60 slots and 4 poles can be shorter, and the material consumption is less, so as to improve the economical efficiency of the lap winding structure; or obtain more power to improve the dynamic property thereof, thereby achieving the purpose of matching different requirements of the 60-slot 4-pole three-phase lap winding structure 100 in the preparation and use processes.

Specifically, the first coil 140 further includes a first welding end 142 and a first hairpin end 143, where the first hairpin end 143 is connected to the two first effective sides 141 and disposed at the same end of the two first effective sides 141, the first welding ends 142 are two, and the two first welding ends 142 are respectively disposed at the other ends of the two first effective sides 141 and extend along directions close to each other.

As shown in fig. 7, in this embodiment, it is exemplarily illustrated that the first soldering end 142 and the first card-sending end 143 may be integrally formed with the first effective edge 141, that is, manufactured using the same copper wire. The first hairpin end 143 may be configured as a "V" shape, and two ends of the "V" shape are respectively connected to the same ends of the two first effective sides 141 so as to span between the two first effective sides 141. And two first welding ends 142 are disposed at the other ends of the two first effective sides 141 and extend in directions approaching each other. When the two first welding ends 142 are extended, a shape similar to a V shape is formed, but the sharp corners of the V shape are not connected. When the two first coils 140 are connected, they are connected by one first welding end 142, and the connection mode of the two first welding ends 142 may be a welding and fixing mode.

It will be appreciated that this embodiment facilitates the overlapping of the first coil 140 by providing a reasonable arrangement of the structure and shape of the first coil 140.

More specifically, the second coil 130 further includes a second welding end 132 and a second hairpin end 133, where the second hairpin end 133 is connected to the two second effective sides 131 and disposed at the same end of the two second effective sides 131, and the two second welding ends 132 are disposed at two ends of the two second effective sides 131, and the two second welding ends 132 are respectively disposed at the other ends of the two second effective sides 131 and extend along the same direction.

As shown in fig. 8, in this embodiment, it is exemplarily illustrated that the second welding end 132 and the second card-issuing end 133 may be integrally formed with the second effective edge 131, that is, may be also manufactured using the same copper wire. The two ends of the second card-issuing end 133 are respectively connected to the same ends of the two second effective sides 131, so as to span between the two second effective sides 131. And two second welding ends 132 are disposed at the other ends of the two second effective sides 131 and extend in the same direction. When the second coil 130 connects the two lap windings 150, it is connected with one first coil 140 of the two lap windings 150, in other words, the second coil 130 is connected between the two first coils 140. The two second welding ends 132 of the second coil 130 are respectively connected with one first welding end 142 of the two first coils 140, and the connection manner can be still welding fixation.

It will be appreciated that this embodiment facilitates the connection of two first coils 140 by the second coil 130 to connect two adjacent lap windings 150 by a reasonable arrangement of the structure and shape of the second coil 130.

As shown in fig. 9, in the present embodiment, the lead-in wire 110 may further include a lead-in soldering terminal 112 and a lead-in card-issuing terminal 113, each of the lead-in soldering terminal 112 and the lead-in card-issuing terminal 113 being provided as one and disposed at both ends of the lead-in effective side 111, respectively. Meanwhile, the lead-in welding end 112 and the lead-in hairpin end 113 are also arranged on the same side of the lead-in effective side 111 and extend in directions away from each other, and the lead-in welding end 112 and the lead-out hairpin end 123 form an eight-shape. And, as such, the lead-out wire 120 may further include a lead-out soldering terminal 122 and a lead-out card terminal 123, the lead-out soldering terminal 122 and the lead-out card terminal 123 being connected to the lead-in effective side 111, the structure and shape of the lead-out wire 120 being substantially the same as those of the lead-in wire 110. When the lead-in wire 110 and the lead-out wire 120 are connected to the first coil 140, the lead-in soldering terminal 112 and the lead-out soldering terminal 122 are connected to a first soldering terminal 142 of the first coil 140, which may be soldered.

More specifically, the first coils 140 of each branch have three pitches, and the second coils 130 have only one pitch, and in both winding modes, the three pitches of the first coils 140 are the same, and the pitches of the second coils 130 are the same.

As shown in fig. 10 and 11, in the present embodiment, it is exemplarily illustrated that the pitches of the first coil 140 and the second coil 130 are the number of the conductor slots 210 spanned by the two first effective sides 141 of the first coil 140 and the number of the conductor slots 210 spanned by the two second effective sides 131 of the second coil 130, respectively. For each branch, the pitches of the plurality of first coils 140 are set to three, and the pitches of the second coils 130 are set to only one. In both winding modes, each branch is wound by the first coil 140 of the three pitches and the second coil 130 of one pitch.

It can be appreciated that the present embodiment can reduce the pitch types of the coils in the two winding modes by setting the three pitches of the first coil 140 and one pitch of the second coil 130 to be the same in both winding modes, so as to be less prone to error in the winding process.

More specifically, in the first winding mode, the 8 slot layers of the conductor slot 210 are a, b, c, d, e, f, g and h slot layers, respectively, the first coil 140 has three pitches of 11 slots, 12 slots and 13 slots, the second coil 130 has a pitch of 15 slots, and the three phases are U, V and W phases, respectively;

the first branch of the U phase is:

the second branch of the U phase is obtained by translating 30 conductor slots 210 along the direction of increasing the serial number of the conductor slots 210 by the first branch of the U phase;

the winding lines of the V-phase and W-phase are obtained by sequentially shifting the winding line of the U-phase by 10 and 20 conductor slots 210 in the direction in which the serial numbers of the conductor slots 210 increase.

As shown in fig. 4 and 11, in the present embodiment, it is exemplarily illustrated that the 8 slot layers of the conductor slot 210 are sequentially disposed along the slot bottom toward the slot opening, and a, b, c, d, e, f, g and h are merely used to represent the serial numbers of the 8 slot layers of the conductor slot 210 and are not used to define the conductor slot 210. In some embodiments, the 8 slot layers of the conductor slots 210 may also be represented by other serial numbers. The numbers "1" to "60" of the conductor grooves 210 are merely used to indicate the order of the conductor grooves 210, and are not intended to limit the conductor grooves 210, and any number of the conductor grooves 210 may be set to be the number "1". In some embodiments, the order of the conductor slots 210 may also be indicated by other numbers. Likewise, the numbers U, V and W are only used to distinguish the three phases. In some embodiments, the sequence numbers U, V and W of the three phases may be interchanged.

As shown in fig. 6 and 11, in the present embodiment, the first winding method will be described by taking the first branch in the U direction as an example.

The line corresponding to "1h" represents the lead-in wire 110 whose lead-in effective side 111 is disposed in the h slot layer of the conductor slot 210 with the sequence number "1", which serves as the winding start position of the first branch of the U phase, referring to U1 in fig. 6 and 11; the line corresponding to "13g-2h" indicates the first coil 140, and the two first effective sides 141 thereof are respectively disposed in the g slot layer of the conductor slot 210 with the number "13" and the h slot layer of the conductor slot 210 with the number "2", and the pitch thereof is the serial number difference between the two conductor slots 210, that is, the pitch is 11 slots. The wound route is the same as that described later, wherein the pitch of the first coil 140 indicated by the route corresponding to "17g-5f" is 12 slots, and the pitch of the first coil 140 indicated by the route corresponding to "17e-4f" is 13 slots. The corresponding lines of "13a-28a" represent the second coils 130, which have a pitch of 12 slots, for connecting the two first coils 140 represented by the corresponding lines of "14a-1b" and "16b-29a", and the second coils 130 are provided only one, which have a pitch of 15 slots.

The line corresponding to "13g-2h-14g-3h-15g-4h-16g-5h-17g-5f-17e-4f-16e-3f-15e-2f-14e-1f-13e-1d-13c-2d-14c-3d-15c-4d-16c-5d-17c-5b-17a-4b-16a-3b-15a-2b-14a-1b" then represents the first lap winding 150;

the line corresponding to "16b-29a-17b-30a-18b-31a-19b-32a-20b-32c-20d-31c-19d-30c-18d-29c-17d-28c-16d-28e-16f-29e-17f-30e-18f-31e-19f-32e-20f-32g-20h-31g-19h-30g-18h-29g-17h-28g" then represents the second lap winding 150.

The line corresponding to "16h" represents the lead-out wire 120, the lead-out effective side 121 of which is disposed in the h slot layer of the conductor slot 210 with the number "16", and which serves as the winding end position of the first branch of the U-phase, referring to X1 in fig. 6 and 11.

As shown in fig. 6 and 11, since the second leg of the U phase is shifted by 30 conductor slots 210 from the first leg of the U phase in the direction in which the number of conductor slots 210 increases, the winding start position and the winding end position of the second leg of the U phase are "31h" and "46h", respectively, referring to U2 and X2 in fig. 4 and 11.

As shown in fig. 6, similarly, the U-phase winding wire is sequentially shifted by 10 and 20 conductor slots 210 in the direction in which the number of the conductor slots 210 increases, so that V-phase and W-phase winding wires can be obtained, respectively. In the first winding mode, the winding start positions of the two branches of the V phase are respectively "11h" and "41h", referring to V1 and V2 in fig. 6, and the winding end positions are respectively "26h" and "56h", referring to Y1 and Y2 in fig. 6; the winding start positions of the two branches of the W phase are "21h" and "51h", respectively, and the winding end positions thereof are "36h" and "6h", respectively, with reference to W1 and W2 in fig. 6, and with reference to Z1 and Z2 in fig. 6.

More specifically, in the second winding mode, the 6 slot layers of the conductor slot 210 are a, b, c, d, e and f slot layers, respectively, the first coil 140 has three pitches of 11 slots, 12 slots and 13 slots, the second coil 130 has a pitch of 15 slots, and the three phases are U, V and W phases, respectively;

the first branch of the U phase is:

As shown in fig. 5 and 10, in the present embodiment, the first branch of the U-phase is exemplarily described, and only one branch of the winding line of the U-phase is described.

Where "1f" denotes a lead-in wire 110 whose lead-in effective side 111 is disposed in the f slot layer of the conductor slot 210 having the sequence number "1" which serves as a winding start position of the first leg of the U phase, referring to U in fig. 5 and 10; the line corresponding to "13e-2f" indicates the first coil 140, and the two first effective sides 141 thereof are respectively disposed in the e-slot layer of the conductor slot 210 with the number "13" and the f-slot layer of the conductor slot 210 with the number "2", and the pitch thereof is the serial number difference between the two conductor slots 210, i.e. the pitch is 11 slots. The wound route is the same as that described later, wherein the pitch of the first coil 140 indicated by the route corresponding to "17e-5d" is 12 slots, and the pitch of the first coil 140 indicated by the route corresponding to "17c-4d" is 13 slots. The line corresponding to "17a-32a" represents a first second coil 130 having a pitch of 12 slots, which is used to connect two first coils 140 represented by the lines corresponding to "16a-5b" and "20b-31a", and is used to connect a first lap winding 150 and a second lap winding 150 having a pitch of 15 slots.

The line corresponding to "13e-2f-14e-3f-15e-4f-16e-5f-17e-5d-17c-4d-16c-3d-15c-2d-14c-1d-13c-1b-13a-2b-14a-3b-15a-4b-16a-5b" then represents the first lap winding 150;

the line "20b-31a-19b-30a-18b-29a-17b-28b-16a-28c-16d-29c-17d-30c-18d-31c-19d-32c-20d-32e-20f-31e-19f-30e-18f-29e-17f-28e" represents the second lap winding 150;

the corresponding lines 16f-31f represent a second coil 130, again having a pitch of 15 slots, which is used to connect the second lap winding 150 to the third lap winding 150;

the line corresponding to "43e-32f-44e-33f-45e-34f-46e-35f-47e-35d-47c-34d-46c-33d-45c-32d-44c-31d-43c-31b-43a-32b-44a-33b-45a-34b-46a-35b" represents the third lap winding 150;

the corresponding line "47a-2a" indicates a third second coil 130, which is still 15 slots in pitch, for connecting a third lap winding 150 and a fourth lap winding 150;

the line "50b-1a-49b-60a-48b-59a-47b-58a-46b-58c-46d-59c-47d-60c-48d-1c-49d-2c-50d-2e-50f-1e-49f-60e-48f-59e-47f-58e" represents the fourth lap winding 150. In the second winding mode, the first leg of the U-phase has a total of three second coils 130 and four lap windings 150.

The line corresponding to "46f" represents the lead-out wire 120, the lead-out effective side 121 of which is disposed in the f slot layer of the conductor slot 210 with the number "46", and which serves as the winding end position of the first branch of the U phase, refer to X in fig. 5 and 10.

As shown in fig. 5, since the winding lines of the V-phase and the W-phase are sequentially shifted by 10 and 20 conductor slots 210 in the direction in which the number of the conductor slots 210 increases, respectively, in the second winding method, the winding start position and the winding end position of the first branch of the V-phase are "11f" and "56f", respectively, referring to V and Y in fig. 5; the winding start position and the winding end position of the first branch of the W phase are "21f" and "6f", respectively, referring to W and Z in fig. 5.

Specifically, the lap winding structure 100 further includes star point copper bars 160, the number of star point copper bars 160 corresponds to the number of branches of each phase, and the star point copper bars 160 are connected with winding end positions of the corresponding branches of the three phases.

As shown in fig. 5 and 6, in the present embodiment, the number of star point copper bars 160 corresponds to the number of branches of each phase, that is, in the first winding manner, the star point copper bars 160 are provided with two; in the second winding mode, the star point copper bar 160 is provided with one.

In the first winding mode, one star point copper bar 160 corresponding to the first branch is connected to the winding end position of the first branch of each phase, that is, the lines corresponding to X1, Y1 and Z1 are connected to one star point copper bar 160. In connection, that is, the lead-out hairpin ends 123 of the three lead wires 120 are connected with the star point copper bar 160, the connection mode can be welding and fixing. And the other star point copper bar 160 corresponding to the second branch is connected with the winding end position of the second branch of each phase, namely, the circuit corresponding to X2, Y2 and Z2 is connected with the other star point copper bar 160.

In the second winding mode, the star point copper bar 160 is connected to the winding end position of the first branch of each phase, that is, the lines corresponding to X, Y and Z are connected to the star point copper bar 160.

More specifically, in the first winding manner, the lap winding structure 100 further includes phase copper bars 170, where the phase copper bars 170 are provided with three phases and correspond to the three phases, and the phase copper bars 170 are connected to winding start positions of 2 branches of the corresponding phases.

In the present embodiment, it is exemplarily illustrated that the phase copper bar 170 is used to connect several branches of each phase in parallel, whereas in the second winding mode, there is only one winding branch, so that the lap winding structure 100 wound according to the second winding mode does not include the phase copper bar 170.

In the first winding mode, the phase copper bar 170 is used to connect 2 branches of each phase in parallel, and three branches are provided to correspond to three phases U, V and W, respectively. When in connection, the phase copper bar 170 is connected with the winding initial positions of the 2 branches of the corresponding phase, for example, the phase copper bar 170 corresponding to the U phase is connected with the circuits corresponding to U1 and U2. When connecting, that is, the lead-in hairpin 113 of the two lead-in wires 110 is connected with the phase copper bar 170, the connection mode can be a welding end.

The implementation principle of the lap winding structure 100 provided in the first embodiment of the present application is:

a reasonable winding mode is selected according to the requirement, then the type of the stator core 200 is selected according to the winding mode, and the stator core 200 is formed by overlapping and winding a plurality of stator punching sheets. After the type of the stator core 200 is determined, the lap winding structure 100 is wound on the stator core 200, when the lap winding structure 100 is wound, each branch takes the lead-in wire 110 as a winding starting position, the lead-out wire 120 as a winding end position, a plurality of first coils 140 are wound in lap to form a plurality of lap windings 150, and the second coil 130 is connected with two adjacent lap windings 150. Then, the type and the number of the star point copper bars 160 and whether the phase copper bars 170 are needed are determined according to the winding mode, and then the star point copper bars 160 or the phase copper bars 170 are fixed.

According to the method, the lap winding structure 100 is wound on the stator iron cores 200 with different slot layers of the conductor slots 210 in two winding modes, so that the winding circuit of the three-phase lap winding structure 100 with 60 slots and 4 poles is shorter, the material consumption is less, and the economical efficiency is improved; or obtain more power to improve the dynamic property thereof, thereby achieving the purpose of matching different requirements of the 60-slot 4-pole three-phase lap winding structure 100 in the preparation and use processes.

Example two

A second embodiment of the present application provides a stator assembly comprising any one of the lap winding structures 100 provided herein.

Example III

The third embodiment of the application provides a motor, which comprises any one of the stator assemblies provided by the application.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A lap winding structure (100), the lap winding structure (100) being suitable for a stator assembly, the stator assembly having a pole number of 4 poles and a phase number of three phases, the stator assembly further comprising a stator core (200), the stator core (200) being provided with 60 conductor slots (210) equally spaced along its circumference, characterized in that the lap winding structure (100) comprises three phases of winding wire, each phase of winding wire having two winding modes;

wherein, in the first winding mode, the conductor slot (210) comprises 8 slot layers, and each winding line of each phase comprises 2 parallel branches;

in a second winding mode, the conductor slot (210) comprises 6 slot layers, the winding line of each phase comprising only 1 branch;

in two coiling modes, every branch road all includes lead-in wire (110), lead-out wire (120), at least one second coil (130) and a plurality of first coil (140), lead-in wire (110) are used as the coiling home position of every branch road, and including leading-in effective limit (111), lead-out wire (120) are used as the coiling terminating position of every branch road, and including leading out effective limit (121), a plurality of first coil (140) are used as lap-winding, and are formed with at least two lap-winding (150), first coil (140) include two parallel and the first effective limit (141) of interval setting, second coil (130) are connected with two first coil (140), and are used for adjacent two lap-winding (150), second coil (130) include two parallel and spaced arrangement's second effective limit (131), leading-in effective limit (111), effective limit (141) and second effective limit (210) are in a groove (131) are set up respectively in one groove.

2. The lap winding structure (100) of claim 1, wherein said first coil (140) further comprises a first welding end (142) and a first hairpin end (143), said first hairpin end (143) being connected to two of said first effective sides (141) and being disposed at the same end of two of said first effective sides (141), said first welding end (142) being provided with two, two of said first welding ends (142) being disposed at the other ends of two of said first effective sides (141) respectively and extending in directions approaching each other.

3. The lap winding structure (100) according to claim 2, wherein said second coil (130) further comprises a second welding end (132) and a second hairpin end (133), said second hairpin end (133) being connected to two of said second effective sides (131) and being arranged at the same end of two of said second effective sides (131), said second welding end (132) being provided with two, two of said second welding ends (132) being respectively arranged at the other ends of two of said second effective sides (131) and extending in the same direction.

4. A lap winding structure (100) according to claim 3, characterized in that the number of first coils (140) of each branch has three pitches and the second coil (130) has only one pitch, the three pitches of the first coils (140) being identical and the pitches of the second coils (130) being identical in both winding modes.

5. The lap winding structure (100) of claim 4, wherein in a first winding mode, said 8 slot layers of said conductor slots (210) are a, b, c, d, e, f, g and h slot layers, respectively, said first coil (140) having three pitches of 11 slots, 12 slots and 13 slots, said second coil (130) having a pitch of 15 slots, and three phases being U, V and W phases, respectively;

the first branch of the U phase is as follows:

the second branch of the U phase is obtained by translating 30 conductor slots (210) along the direction of increasing the serial number of the conductor slots (210) by the first branch of the U phase;

and the winding lines of the V phase and the W phase are sequentially shifted by 10 and 20 conductor grooves (210) along the increasing direction of the sequence numbers of the conductor grooves (210) by the winding lines of the U phase.

6. The lap winding structure (100) of claim 5, wherein in a second winding mode, 6 slot layers of said conductor slots (210) are a, b, c, d, e and f slot layers, respectively, said first coil (140) has three pitches of 11 slots, 12 slots and 13 slots, said second coil (130) has a pitch of 15 slots, and three phases are U, V and W phases, respectively;

the first branch of the U phase is as follows:

7. The lap winding structure (100) of claim 6, wherein said lap winding structure (100) further comprises star point copper bars (160), said star point copper bars (160) corresponding in number to the number of legs of each phase, said star point copper bars (160) being connected with winding end positions of corresponding legs of three phases.

8. The lap winding structure (100) according to claim 7, wherein in a first winding mode, said lap winding structure (100) further comprises phase copper bars (170), said phase copper bars (170) being provided with three phases and corresponding to the three phases respectively, said phase copper bars (170) being connected with winding start positions of 2 branches of the corresponding phase.

9. A stator assembly, characterized in that it comprises a lap winding structure (100) according to any one of claims 1 to 8.

10. An electric machine comprising the stator assembly of claim 9.