CN218514165U - Stator winding, stator and three-phase motor - Google Patents

Abstract

The utility model relates to a stator winding, stator and three phase machine, stator winding is used for the stator, the stator core of stator is provided with 72 conductor grooves along its circumference equidistant, the number of poles of stator is 6, and the number of phases is the three-phase, and every looks all has 3 branch roads parallelly connected, follows stator core's circumference, every branch road all includes first coiling direction and second coiling direction, stator winding includes the return wire, and every branch road all passes through at the coiling in-process that the wave wound the return wire by first coiling direction adjustment is second coiling direction, just the return wire is followed first coiling direction extends. The application provides when adopting the return wire when the in-process of coiling is transferred the direction, can reduce the unbalanced rate of three phase resistance to about 1%, and then with the line loss that reduces stator winding to reduce the risk that three phase motor burns out.

Description

Stator winding, stator and three-phase motor

Technical Field

The application relates to the technical field of motors, in particular to a stator winding, a stator and a three-phase motor.

Background

For a three-phase motor in which the number of slots of an existing stator is 72, the number of poles of the stator is 6, the number of phases of a stator winding is three, and each phase has 3 branches connected in parallel, the imbalance rate of the resistance of each phase needs to be kept within a small range so as to reduce the line loss of the stator winding and reduce the risk of machine burning of the three-phase motor. However, the three-phase motor with the above parameters has a large reduction space for the unbalance rate of the resistances of the three phases because the stator windings of the three-phase motor are not proper in the winding process.

SUMMERY OF THE UTILITY MODEL

Based on this, this application provides a stator winding, stator and three-phase motor to improve the slot number of stator among the prior art and be 72, the number of poles of stator is 6, and the number of phases of stator winding is the three-phase and every looks all has the less problem of unbalance rate of the parallelly connected three-phase motor's of 3 branch roads resistance.

In a first aspect, the application provides a stator winding, stator winding is used for the stator, the stator core of stator is provided with 72 conductor slots along its circumference equidistant, the number of poles of stator is 6, and the number of phases is the three-phase, and every looks all has 3 branches to connect in parallel, follows stator core's circumference, every branch road all includes first coiling direction and second coiling direction, stator winding includes the return wire, and every branch road all passes through at the coiling in-process that the wave wound the return wire by first coiling direction adjustment is second coiling direction, just the return wire is followed first coiling direction extends.

In one embodiment, the stator winding further comprises a first coil and a second coil, each of the first coil and the second coil comprising an active edge, a first end and a second end;

the effective sides of the first coil are arranged in the two conductor slots at intervals, the first end part of the first coil is connected with the same end of the two effective sides, and the second end part of the first coil is arranged at the other end of the two effective sides and extends along the same direction;

the effective edge of the second coil is provided with one, and the effective edge and the first end part of the second coil are respectively arranged at two ends of the effective edge;

each branch circuit is used as an leading-in end and a leading-out end in the winding process through the second coil, and the return line is formed by the first end part of the first coil.

In one embodiment, the stator winding further comprises a third coil and a fourth coil, each of the third coil and the fourth coil comprising the active edge, the first end and the second end;

the effective sides of the third coil are arranged in the two conductor slots at intervals, the first end part of the third coil is connected with the same end of the two effective sides, and the second end part of the third coil is arranged at the other end of the two effective sides and extends along the opposite direction;

the fourth coil is the same shape as the third coil and has a different pitch from the third coil;

each branch is connected with the first coil and the second coil through the third coil and the fourth coil and is wound in a wave winding mode.

In one embodiment, the stator winding further includes a phase copper bar, the phase copper bar is correspondingly arranged with three phases, the phase copper bar includes a first copper bar and 3 first terminals arranged on the first copper bar, and the 3 first terminals are respectively connected with the leading-in ends of the 3 branches of each phase in the winding process.

In one embodiment, the stator winding further comprises a star point copper bar, the star point copper bar comprises a second copper bar and second terminals arranged on the second copper bar, the second terminals are provided with three groups and are respectively arranged corresponding to the three groups, the number of the second terminals in each group is 3, and the second terminals are respectively connected with leading-out ends of 3 branches of each phase in the winding process.

In one embodiment, the conductor slots are sequentially provided with a, b, c, d, e and f in a direction close to the axis of the stator, the number of the slot layers is 6, the three phases of the stator are respectively a U phase, a V phase and a W phase, the pitch of the first coil is 12 slots, the pitch of the third coil is 12 slots, and the pitch of the fourth coil is 11 slots;

the winding circuit of the first branch of the U-phase is as follows:

24a-36b-48a-60b-72a-12b-23a-35b-47a-69b-71a-11b-22a-34b-46a-58b-70a-10b-21a-33b-45a-57b-69a-9b-69b-57a-45b-33a-21b-9a-70b-58a-46b-34a-22b-10a-71b-59a-47b-35a-23b-11a-72b-60a-48b-36a-24b-12a；

the winding circuit of the second branch of the U-phase is as follows:

24c-36d-48c-60d-72c-12d-23c-35d-47c-69d-71c-11d-22c-34d-46c-58d-70c-10d-21c-33d-45c-57d-69c-9d-69d-57c-45d-33c-21d-9c-70d-58c-46d-34c-22d-10c-71d-59c-47d-35c-23d-11c-72d-60c-48d-36c-24d-12c；

the winding line of the third branch of the U-phase is as follows:

24e-36f-48e-60f-72e-12f-23e-35f-47e-69f-71e-11f-22e-34f-46e-58f-70e-10f-21e-33f-45e-57f-69e-9f-69f-57e-45f-33e-21f-9e-70f-58e-46f-34e-22f-10e-71f-59e-47f-35e-23f-11e-72f-60e-48f-36e-24f-12e；

and along the second winding direction, 15 and 30 conductor grooves are sequentially arranged between the leading-in ends of the winding lines of the V phase and the W phase and the leading-in end of the winding line of the U phase.

In one embodiment, the stator winding further includes an insulator, the phase copper bar and the star point copper bar are at least partially disposed in the insulator, the phase copper bar and the star point copper bar are disposed at intervals, and the phase copper bar and the star point copper bar are disposed at intervals.

In one embodiment, one end of the insulator in the axial direction of the stator is provided with a limit end part, and the limit end part is used for abutting against the end part of the stator core.

In a second aspect, a stator is provided in a second embodiment of the present application, where the stator includes a stator core and any one of the stator windings provided in the second embodiment of the present application, and the stator winding is at least partially disposed in a conductor slot of the stator core.

In a third aspect, the present application provides a three-phase electric machine comprising any one of the stators provided herein.

The utility model provides a slot number of stator is 72, and the number of poles of stator is 6, and the number of phases of stator winding 20 all has 3 parallelly connected three phase motor of branch road for three-phase and every looks, and when its stator winding adopted the return wire when the in-process of coiling direction of turning round, can reduce three phase resistance's unbalance rate to about 1%, and then in order to reduce stator winding's line loss, and reduce the risk that three phase motor burns out.

Drawings

Fig. 1 is a schematic structural diagram of a stator provided in the second embodiment of the present application;

fig. 2 is a schematic structural diagram of a stator core of a stator provided in a second embodiment of the present application;

fig. 3 is a schematic structural diagram of a first coil of a stator winding according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a second coil of a stator winding according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a third coil or a fourth coil of a stator winding provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a gap bridge wire of a stator winding according to another embodiment of the present application;

fig. 7 is a schematic structural diagram of a phase copper bar of a stator winding according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a star point copper bar of a stator winding according to an embodiment of the present application;

fig. 9 is a schematic view illustrating a phase copper bar and a star point copper bar of a stator winding disposed on an insulator according to an embodiment of the present application;

fig. 10 is a schematic view of a slot layer of a conductor slot of a stator according to a second embodiment of the present application;

fig. 11 is a winding diagram of a U-phase winding structure of a stator winding according to an embodiment of the present application;

fig. 12 is a winding diagram of a stator winding according to an embodiment of the present application.

Reference numerals: 10. a stator core; 11. a conductor slot; 20. a stator winding; 21. a first coil; 22. a second coil; 23. a third coil; 24. a fourth coil; 25. a bridge wire; 201. an effective edge; 202. a first end portion; 203. a second end portion; 204. a first connection section; 205. a second connection section; 206. welding the end part; 207. a gap bridge connecting section; 30. making copper bars; 31. a first copper bar; 32. a first terminal; 33. a phase lead-out terminal; 40. a star point copper bar; 41. a second copper bar; 411. a third copper bar; 412. a fourth copper bar; 42. a second terminal; 50. an insulator; 51. and limiting the end part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that the illustration provided in the present embodiment is only for schematically illustrating the basic idea of the present invention.

The structure, proportion, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, and any structural modification, proportion relation change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention.

References in this specification to "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are for convenience only to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example one

As shown in fig. 1 and fig. 2, this application embodiment provides a stator winding 20, stator winding 20 is used for the stator, the stator core 10 of stator is provided with 72 conductor slots 11 along its circumference equidistant, the number of poles of stator is 6, and the number of phases is the three-phase, and every looks all has 3 branches to connect in parallel, follows stator core 10's circumference, every branch road all includes first coiling direction and second coiling direction, stator winding 20 includes the return wire, and every branch road all passes through in the coiling process of wave winding the return wire by first coiling direction adjusts to the second coiling direction, just the return wire is followed first coiling direction extends.

As shown in fig. 2, in the present embodiment, it is exemplarily illustrated that the stator core 10 is provided as a hollow cylinder, which may be specifically composed of several punching sheets. The conductor slots 11 are provided inside the stator core 10, and the conductor slots 11 penetrate the stator core 10 in the axial direction of the stator core 10 so as to wind the stator winding 20 around the stator core 10.

The stator winding 20 comprises in particular a winding structure of three phases, and each phase has 3 branches connected in parallel. The winding structure is particularly formed by winding a coil made of a conductor material, and the shape of the cross section of the conductor is particularly set to be flat, so that the stator winding 20 is used for a flat wire motor. Each branch of each phase has an incoming terminal and an outgoing terminal in the winding process, and each branch of each phase is wound into stator core 10 from the incoming terminal and is wound out of stator core 10 from the outgoing terminal to form a winding line on stator core 10.

As shown in fig. 2, in the present embodiment, when viewed from the extending direction of the lead-in end of the winding wire, the clockwise direction defining the circumferential direction of the stator core 10 is the first winding direction, and the counterclockwise direction defining the circumferential direction of the stator core 10 is the second winding direction.

Each branch of each phase has a turning direction in the winding process, namely, each branch of each phase enters the stator core 10 from the leading-in end and is wound along the first winding direction, and after the winding is pointed, the first winding direction is adjusted to the second winding direction, and then the winding is continued until the branch is wound out from the leading-out end.

The return line is arranged at the turning direction of the winding line, so that each branch of each phase is adjusted from the first winding direction to the second winding direction through the return line. The return line extending in the first winding direction may be understood as follows: when each branch of each phase is adjusted to the second winding direction from the first winding direction, the branch continues to extend for a distance along the first winding direction, and then the branch is wound along the second winding direction.

The utility model provides a slot number of stator is 72, and the number of poles of stator is 6, and stator winding 20's number of phases all has 3 parallelly connected three phase motor of branch road for three-phase and every looks, and when its stator winding 20 adopted the return wire when the in-process turning direction of coiling, can reduce three phase resistance's unbalance rate to about 1%, and then in order to reduce stator winding 20's line loss, and reduce the risk that three phase motor burns out.

Referring to fig. 3 and 4, in particular, the stator winding 20 further includes a first coil 21 and a second coil 22, and each of the first coil 21 and the second coil 22 includes an effective edge 201, a first end 202 and a second end 203;

the effective sides 201 of the first coil 21 are disposed in the two conductor slots 11 at intervals, the first end 202 thereof is connected to the same end of the two effective sides 201, and the second ends 203 thereof are disposed at the other ends of the two effective sides 201 respectively and extend in the same direction;

one effective edge 201 of the second coil 22 is provided, and the effective edge 201 and the first end 202 of the second coil are respectively arranged at two ends of the effective edge 201;

each branch is used as an inlet and an outlet in the winding process through the second coil 22, and the return wire is formed by the first end 202 of the first coil 21.

In the present embodiment, it is exemplarily illustrated that the effective edge 201 is disposed along the axial direction of the stator core 10 and disposed in the conductor slot 11 of the stator core 10, which may be specifically covered by insulating paper. The first end portion 202 and the second end portion 203 are respectively arranged at two ends of the effective edge 201 and are located outside the stator slot.

The first coil 21 specifically includes two effective sides 201, two second ends 203, and one first end 202, and is configured in a shape in which one end is open and the other end is closed. The two second end portions 203 constitute one end of the opening of the first coil 21, and the two second end portions 203 extend obliquely along the second winding direction, and the two second end portions 203 are parallel to each other. Correspondingly, the first end portion 202 constitutes a closed end of the first coil 21, and is specifically configured in a "U" shape. The first end portion 202 includes a first connecting section 204 respectively connected to the two effective sides 201 and a second connecting section 205 connecting the two first connecting sections 204. Since the first end portion 202 forms a loop line, the two first connecting sections 204 extend obliquely along the first winding direction, and the two first connecting sections 204 are parallel to each other. It will be appreciated that the pitch of the first coil 21 is the slot pitch spanned by the two effective sides 201.

The second coil 22 specifically includes an effective side 201, a second end 203 and a first end 202, and since the second coil 22 serves as the lead-in and lead-out terminals of the winding line of each branch of each phase, the second end 203 and the first end 202 of the second coil 22 both extend in the first winding direction or the second winding direction. It will be appreciated that the second coil 22 does not have a pitch as it is provided with only one effective side 201.

As shown in fig. 5, more specifically, the stator winding 20 further includes a third coil 23 and a fourth coil 24, and the third coil 23 and the fourth coil 24 each include the effective side 201, the first end 202, and the second end 203;

the effective sides 201 of the third coil 23 are disposed at intervals in the two conductor slots 11, the first end 202 thereof is connected to the same end of the two effective sides 201, and the second ends 203 thereof are disposed at the other ends of the two effective sides 201 respectively and extend in opposite directions;

the fourth coil 24 is the same shape as the third coil 23 and has a different pitch from the third coil 23;

each branch is connected with the first coil 21 and the second coil 22 through the third coil 23 and the fourth coil 24, and is wound in a wave winding manner.

In the present embodiment, it can be understood that, for example, the third coil 23 and the fourth coil 24 are provided in the same shape: the third coil 23 and the fourth coil 24 each specifically comprise two effective sides 201, two second ends 203 and one first end 202; the extending directions of the two second ends 203 of the third coil 23 and the fourth coil 24 are the same; meanwhile, the first ends 202 of the third coil 23 and the fourth coil 24 are formed in the same shape, and the first end 202 of the "V" shape is exemplified in the present embodiment. It is understood that, in terms of shape, the third coil 23 and the fourth coil 24 can be regarded as two symmetrically arranged second coils 22, and the two second ends 203 of the two second coils 22 are fixedly connected to form the aforementioned "V" shape.

Likewise, the pitches of the third coil 23 and the fourth coil 24 are also the number of conductor slots 11 spanned by the two effective sides 201 thereof, and the difference in pitch of the third coil 23 and the fourth coil 24 means that the number of conductor slots 11 spanned by the two effective sides 201 of the third coil 23 and the fourth coil 24 is different.

In the present embodiment, the first ends 202 of the first, second, third and fourth coils 21, 22, 23 and 24 are all disposed at the same end of the stator core 10, and the second ends 203 thereof are all disposed at the other end of the stator core 10. For a flat wire motor, several first end portions 202 of the stator winding 20 need to be twisted during the preparation process, so as to meet the preparation requirement of the flat wire motor.

As shown in fig. 6, in some embodiments, only coils having the same shape as the third coil 23 and the fourth coil 24 may be provided, and the pitches of the coils may be provided several kinds. When each branch of each phase reverses the winding direction, two adjacent coils at the reversing direction can be connected by the gap bridge wire 25, and the return wire is formed by the gap bridge wire 25. The gap bridge wire 25 specifically includes two welding end portions 206 and a gap bridge connecting section 207 connecting the two welding end portions 206, and the two welding end portions 206 are disposed obliquely along the first winding direction and are respectively connected to one second end portion 203 of one coil.

Of course, in the present embodiment, when each branch of each phase is wound in a wave winding manner, coils with several pitches may be provided, and the number of pitches is not limited to two in total for the third coil 23 and the fourth coil 24.

It is to be understood that the return wire of the present embodiment is constituted by the first end portion 202 of the first coil 21, and the arrangement of the return wire can be completed while the first coil 21 is disposed on the stator core 10, so as to avoid inconvenience in separately arranging the bridge wire 25 to constitute the return wire.

It can also be understood that in the present embodiment, only the third coil 23 and the fourth coil 24 with two different pitches are used when winding is performed in the winding manner of wave winding, so that the types of the coils can be simplified as much as possible while the winding of the winding circuit is successfully completed, and therefore, errors are not easily caused during winding, and the work efficiency in the winding process is further improved.

As shown in fig. 7, specifically, the stator winding 20 further includes phase copper bars 30, the three phase copper bars 30 are correspondingly disposed, the phase copper bars 30 include first copper bars 31 and 3 first terminals 32 disposed on the first copper bars 31, and the 3 first terminals 32 are respectively connected to the leading-in ends of the 3 branches of each phase in the winding process.

In the present embodiment, it is exemplarily explained that, since the stator winding 20 of the present embodiment includes a winding structure of three phases, the number of the phase copper bars 30 is correspondingly provided to be 3. The first copper bar 31 and the first terminal 32 of the first copper bar 30 are of an integral structure, and the first copper bar 31 may be arc-shaped and arranged along the axial direction of the stator. One end of the first copper bar 31 is folded and extended along the direction close to the axis of the stator, 3 first terminals 32 are all arranged on the end part, and the 3 first terminals 32 are all extended along the axial direction of the stator, so that the first terminals 32 are connected with the leading-in end of each branch in the winding process. Since each branch of each phase uses the second coil 22 as a lead-in terminal, the first terminal 32 is used to be welded and fixed to the second end 203 of the first second coil 22 in the winding process of the 3 branches of each phase.

As shown in fig. 1 and 7, the other end of the first copper bar 31 is folded and extended in a direction away from the axis of the stator, and is formed with a phase leading-out terminal 33 for leading current into or out of the stator winding 20; and along the circumferential direction of the stator, the ends of the 3 phase copper bars 30 provided with the phase leading-out terminals 33 can also extend along the direction close to each other.

As shown in fig. 8, more specifically, the stator winding 20 further includes a star point copper bar 40, the star point copper bar 40 includes a second copper bar 41 and second terminals 42 disposed on the second copper bar 41, the second terminals 42 are provided with three groups and are respectively disposed corresponding to the three groups, the number of the second terminals 42 in each group is 3, and the second terminals 42 in each group are respectively connected to the leading-out ends of the 3 branches of each phase in the winding process.

In the present embodiment, it is exemplarily illustrated that the second copper bar 41 is provided in an arc shape and is arranged along the axial direction of the stator, and the second copper bar 41 is provided with three end portions extending in a direction close to the axis of the stator by being folded. In this embodiment, the second copper bar 41 includes split type third copper bar 411 and fourth copper bar 412, and third copper bar 411 and fourth copper bar 412 all set up to the arc, and wherein the both ends of third copper bar 411 all turn over along the direction that is close to the stator axis and extend, and the one end and the third copper bar 411 welded fastening of fourth copper bar 412, and the other end turns over along the direction that is close to the stator axis and extends. Each of the 3 second terminals 42 is provided on an end portion extending in the direction of the axis of the stator by being folded back.

In some embodiments, the second copper bar 41 may also be configured as an integral structure, where two ends of the second copper bar 41 are folded and extended in a direction close to the axis of the stator, and a middle portion of the second copper bar 41 is welded and fixed with a third folded and extended end portion.

As shown in fig. 7 to 9, more specifically, the stator winding 20 further includes an insulator 50, the two phase copper bars 30 and the star point copper bar 40 are at least partially disposed in the insulator 50, the two phase copper bars 30 and the star point copper bar 40 are disposed at intervals, and the two phase copper bars 30 are disposed at intervals.

In the present embodiment, it is exemplarily illustrated that the insulator 50 is made of plastic, is provided with an arc shape, and is disposed in the axial direction of the stator. The insulator 50 is at least covered outside the first copper bar 31 and the second copper bar 41, and the specific preparation method may be that the phase copper bar 30, the star point copper bar 40 and the insulator 50 are integrally injection-molded. The first copper bar 31 and the second copper bar 41 are arranged in the insulator 50 at intervals, and similarly, the first copper bars 31 are also arranged at intervals to avoid the short circuit of the three-phase circuit caused by the contact between the phase copper bar 30 and the star point copper bar 40 or the contact between the phase copper bar 30 and the phase copper bar 30.

It can be understood that, in the embodiment, the phase copper bar 30 and the star point copper bar 40 are prefabricated into an integral structure through the insulator 50, so that the phase copper bar 30 and the star point copper bar 40 can be conveniently assembled at the same time, and the assembling is more convenient and faster; meanwhile, in the preparation process of the stator, the number of materials is reduced, and the materials are easily controlled.

As shown in fig. 1 and 9, more specifically, one end of the insulator 50 in the axial direction of the stator is provided with a limit end 51, and the limit end 51 is used for abutting against the end of the stator core 10.

In the present embodiment, it is exemplarily illustrated that the insulator 50 is disposed at an outer side of the several coils in a circumferential direction of the stator, and an inner side thereof is in contact with the several coils. And the insulator 50 is disposed at one end of the stator core 10 in the axial direction of the stator, and is spaced apart from the stator core 10. The stopper end 51 is provided at one end of the insulator 50 near the stator core 10 in the axial direction of the stator, and is integrally formed with the insulator 50. In the present embodiment, the number of the limit end portions 51 is 3, and the 3 limit end portions 51 are respectively located at both ends and a middle portion of the insulator 50 and abut against the end portions of the stator core 10.

It can be understood that, in this embodiment, the insulator 50 is abutted to the stator core 10 through the limiting end portion 51, the number of limiting modes of the insulator 50 on the stator is increased, and the stability of the insulator 50 on the stator is enhanced, so that the phase copper bar 30 and the star point copper bar 40 which form an integral structure with the insulator 50 are more stable, and further, the noise of the three-phase motor in the operation process is reduced, and the NVH performance of the three-phase motor is improved.

As shown in fig. 10 and 11, specifically, the conductor slot 11 is provided with a, b, c, d, e and f in sequence in a direction close to the axis of the stator, the three phases of the stator are U-phase, V-phase and W-phase, respectively, the pitch of the first coil 21 is 12 slots, the pitch of the third coil 23 is 12 slots, and the pitch of the fourth coil 24 is 11 slots;

the winding circuit of the first branch of the U-phase is as follows:

24a-36b-48a-60b-72a-12b-23a-35b-47a-69b-71a-11b-22a-34b-46a-58b-70a-10b-21a-33b-45a-57b-69a-9b-69b-57a-45b-33a-21b-9a-70b-58a-46b-34a-22b-10a-71b-59a-47b-35a-23b-11a-72b-60a-48b-36a-24b-12a；

the winding circuit of the second branch of the U-phase is as follows:

24c-36d-48c-60d-72c-12d-23c-35d-47c-69d-71c-11d-22c-34d-46c-58d-70c-10d-21c-33d-45c-57d-69c-9d-69d-57c-45d-33c-21d-9c-70d-58c-46d-34c-22d-10c-71d-59c-47d-35c-23d-11c-72d-60c-48d-36c-24d-12c；

the winding line of the third branch of the U-phase is as follows:

24e-36f-48e-60f-72e-12f-23e-35f-47e-69f-71e-11f-22e-34f-46e-58f-70e-10f-21e-33f-45e-57f-69e-9f-69f-57e-45f-33e-21f-9e-70f-58e-46f-34e-22f-10e-71f-59e-47f-35e-23f-11e-72f-60e-48f-36e-24f-12e；

as shown in fig. 12, in the second winding direction, 15 and 30 conductor grooves 11 are sequentially provided between the lead-in ends of the V-phase and W-phase winding wires and the lead-in end of the U-phase winding wire.

In the present embodiment, it is exemplarily explained that the conductor slots 11 are numbered in order in the circumferential direction of the stator core 10. It is to be understood that the numbering is not meant to be exclusive and that any one conductor slot 11 on the stator core 10 may be numbered "1". Likewise, for a, b, c, d, e and f, 6 slot layers in total, and U-phase, V-phase and W-phase of the stator, there is no special meaning, and they are used only as labels for convenience of description. In some embodiments, a, b, c, d, e, and f may be replaced by other numbers, and the U-phase, V-phase, and W-phase may be arbitrarily interchanged.

For the first branch of the U-phase, it is first wound in the first winding direction, and the second coil 22 is used as the leading end, the second coil 22 corresponds to the winding route of 24a, and the effective edge 201 of the second coil 22 is correspondingly placed in the a-slot layer of the conductor slot 11 numbered "24".

Subsequently, winding is performed using two third coils 23, the corresponding winding lines of which are "36d-48a" and "60b-72a" respectively, and the two effective sides 201 of the first third coil 23 are placed in the b-slot layer of the conductor slot 11 numbered "36" and the a-slot layer of the conductor slot 11 numbered "48" respectively, and the two effective sides 201 of the second third coil 23 are placed in the b-slot layer of the conductor slot 11 numbered "60" and the a-slot layer of the conductor slot 11 numbered "72" respectively.

Then, the wave winding is continued by using a fourth coil 24, the winding line corresponding to the fourth coil 24 is "12b-23a", and two effective sides 201 of the fourth coil 24 are respectively placed in the groove layer of the conductor groove 11b with the number of "12" and the groove layer a of the conductor groove 11 with the number of "23".

The subsequent winding lines of the first branch of the U phase are the same.

It should be noted that the winding route corresponding to the first coil 21 is "9b-69b", and the first branch of the U-phase is also here adjusted to the winding direction, at which time the first winding direction is adjusted to the second winding direction. It is understood that the two effective sides 201 of the first coil 21 are respectively placed in the b-slot layer of the conductor slot 11 numbered "9" and the b-slot layer of the conductor slot 11 numbered "69".

And the second coil 22 as the lead-out terminal corresponds to the winding wire of 12a, and its effective side 201 is placed in the a-slot layer of the conductor slot 11 numbered "12".

And winding lines of a second branch and a third branch of the U-phase are the same. It will be appreciated that the second and third legs of the U phase are still wound from the conductor slot 11 numbered "24", differing from the first leg by being placed in different slot layers.

For the winding lines of the V-phase and the W-phase, since 15 and 30 conductor grooves 11 are sequentially arranged between the leading-in end of the winding line and the leading-in end of the winding line of the U-phase along the second winding direction, three branches of the V-phase start to be wound from the conductor groove 11 with the number of "8", and three branches of the W-phase start to be wound from the conductor groove 11 with the number of "64".

The implementation principle of the stator winding 20 provided in the first embodiment of the present application is as follows:

firstly, the coils, the stator core 10, the phase copper bars 30 and the star point copper bars 40 are respectively manufactured and molded, the phase copper bars 30 and the star point copper bars 40 are manufactured into an integral component through insulators 50, and then each branch of each phase is respectively wound through each coil. When each branch of each phase is wound, the second coil 22 is used as an inlet terminal and an outlet terminal, and the third coil 23 and the fourth coil 24 are used for carrying out wave winding, and meanwhile, the winding direction is also adjusted through the first coil 21. Then, the integral member formed by the phase copper bar 30, the star point copper bar 40 and the insulator 50 is arranged at one end of the stator core 10, and the inner side of the insulator 50 is abutted against a plurality of coils, so that the limiting end 51 is abutted against the end of the stator core 10. Then, the 3 first terminals 32 of the phase copper bar 30 are connected to the leading-in terminals of the 3 branches of each phase, and the second terminal 42 of the star point copper bar 40 is connected to the leading-out terminal of each branch of each phase, so as to form a three-phase circuit.

The utility model provides a slot number of stator is 72, and the number of poles of stator is 6, and stator winding 20's number of phases all has 3 parallelly connected three phase motor of branch road for three-phase and every looks, and when its stator winding 20 adopted the return wire when the in-process turning direction of coiling, can reduce three phase resistance's unbalance rate to about 1%, and then in order to reduce stator winding 20's line loss, and reduce the risk that three phase motor burns out.

Example two

The second embodiment of the present application provides a stator, the stator includes stator core 10 and any one kind of stator winding 20 that the present application provided, stator winding 20 is at least partially arranged in conductor slot 11 of stator core 10.

EXAMPLE III

The third embodiment of the application provides a three-phase motor, three-phase motor includes any one kind of stator that this application provided.

Comparative example

The application comparative example provides a stator winding 20, stator winding 20 is used for the stator, the stator core 10 of stator is provided with 72 conductor slots 11 along its circumference equidistant, the number of poles of stator is 6, and the number of phases is the three-phase, and every looks all has 3 branches to connect in parallel, follows stator core 10's circumference, every branch road all includes first coiling direction and second coiling direction, stator winding 20 includes the span line, and every branch road all passes through at the coiling in-process that the wave wound the span line by first coiling direction adjustment is second coiling direction, just the span line is followed the second coiling direction extends.

It should be noted that, in the comparative example, each branch of each phase is turned in the winding direction by the span line, and the span line is adjusted from the first winding direction to the second winding direction and then directly extends in the second winding direction.

It is understood that the comparative example can still adopt the second coil 22, the third coil 23 and the fourth coil 24 in the stator winding provided in the first embodiment of the present application, and the comparative example is different from the first embodiment at least in that: the shape of the first end 202 of the first coil 21. The first end 202 of the first coil 21 of the comparative example may be provided in a "V" shape.

Application examples

In the application example of the present application, the stator winding 20 provided in the first example and the stator winding provided in the comparative example were subjected to resistance tests using a stator comprehensive tester, respectively, to obtain resistance data as shown in table 1. It can be known from table 1 that no matter be used for generator or driving motor with stator winding 20, the unbalanced rate of resistance of stator winding 20 that embodiment a provided is about 1%, therefore, the slot number of the stator that this application provided is 72, the number of poles of stator is 6, stator winding 20's phase number is three-phase and every looks all has the parallelly connected three-phase machine of 3 branch roads, when its stator winding 20 adopted the return wire when the in-process reversal of coiling, can effectively reduce the unbalanced rate of three-phase resistance, and then with the line loss that reduces stator winding 20, and reduce the risk of three-phase machine burn out.

TABLE 1 resistance test data for examples and comparative examples

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a stator winding, its characterized in that, stator winding (20) are used for the stator, stator core (10) of stator are provided with 72 conductor slots (11) along its circumference equidistant, the number of poles of stator is 6, and the number of phases is the three-phase, and every looks all has 3 branches to connect in parallel, follows the circumference of stator core (10), every branch road all includes first coiling direction and second coiling direction, stator winding (20) include the return wire, and every branch road all passes through at the coiling in-process of ripples winding the return wire by first coiling direction adjustment is second coiling direction, just the return wire is followed first coiling direction extends.

2. Stator winding according to claim 1, characterized in that the stator winding (20) further comprises a first coil (21) and a second coil (22), the first coil (21) and the second coil (22) each comprising an active edge (201), a first end (202) and a second end (203);

the effective sides (201) of the first coil (21) are arranged in the two conductor slots (11) at intervals, the first end (202) of the first coil is connected with the same end of the two effective sides (201), and the second end (203) of the first coil is respectively arranged at the other end of the two effective sides (201) and extends along the same direction;

one effective edge (201) of the second coil (22) is arranged, and the effective edge (201) and the first end part (202) of the second coil are respectively arranged at two ends of the effective edge (201);

each branch circuit is used as an inlet end and an outlet end in the winding process through the second coil (22), and the return line is formed by the first end portion (202) of the first coil (21).

3. A stator winding according to claim 2, characterized in that the stator winding (20) further comprises a third coil (23) and a fourth coil (24), the third coil (23) and the fourth coil (24) each comprising the active side (201), the first end portion (202) and the second end portion (203);

the effective sides (201) of the third coil (23) are arranged in the two conductor slots (11) at intervals, the first end (202) of the third coil is connected with the same end of the two effective sides (201), and the second end (203) of the third coil is respectively arranged at the other end of the two effective sides (201) and extends along the opposite direction;

the fourth coil (24) is the same shape as the third coil (23) and has a different pitch from the third coil (23);

each branch is connected with the first coil (21) and the second coil (22) through the third coil (23) and the fourth coil (24) and is wound in a wave winding mode.

4. A stator winding according to claim 3, wherein the stator winding (20) further comprises phase copper bars (30), the phase copper bars (30) are arranged corresponding to three phases, the phase copper bars (30) comprise first copper bars (31) and 3 first terminals (32) arranged on the first copper bars (31), and the 3 first terminals (32) are respectively connected with the leading-in ends of the 3 branches of each phase in the winding process.

5. The stator winding according to claim 4, wherein the stator winding (20) further comprises a star point copper bar (40), the star point copper bar (40) comprises a second copper bar (41) and second terminals (42) arranged on the second copper bar (41), the second terminals (42) are arranged in three groups and are respectively arranged corresponding to the three groups, the number of the second terminals (42) in each group is 3, and the second terminals (42) are respectively connected with the leading-out ends of the 3 branches of each phase in the winding process.

6. A stator winding according to claim 5, characterized in that the conductor slots (11) are provided in sequence with a, b, c, d, e and f for a total of 6 slot layers in a direction close to the stator axis, the three phases of the stator are a U-phase, a V-phase and a W-phase, respectively, the first coil (21) has a pitch of 12 slots, the third coil (23) has a pitch of 12 slots, and the fourth coil (24) has a pitch of 11 slots;

the winding circuit of the first branch of the U-phase is as follows:

24a-36b-48a-60b-72a-12b-23a-35b-47a-69b-71a-11b-22a-34b-46a-58b-70a-10b-21a-33b-45a-57b-69a-9b-69b-57a-45b-33a-21b-9a-70b-58a-46b-34a-22b-10a-71b-59a-47b-35a-23b-11a-72b-60a-48b-36a-24b-12a；

the winding circuit of the second branch of the U-phase is as follows:

24c-36d-48c-60d-72c-12d-23c-35d-47c-69d-71c-11d-22c-34d-46c-58d-70c-10d-21c-33d-45c-57d-69c-9d-69d-57c-45d-33c-21d-9c-70d-58c-46d-34c-22d-10c-71d-59c-47d-35c-23d-11c-72d-60c-48d-36c-24d-12c；

the winding circuit of the third branch of the U-phase is as follows:

24e-36f-48e-60f-72e-12f-23e-35f-47e-69f-71e-11f-22e-34f-46e-58f-70e-10f-21e-33f-45e-57f-69e-9f-69f-57e-45f-33e-21f-9e-70f-58e-46f-34e-22f-10e-71f-59e-47f-35e-23f-11e-72f-60e-48f-36e-24f-12e；

and along the second winding direction, 15 and 30 conductor grooves (11) are sequentially arranged between the leading-in ends of the winding lines of the V-phase and the W-phase and the leading-in ends of the winding lines of the U-phase.

7. Stator winding according to claim 5, characterized in that the stator winding (20) further comprises an insulator (50), the phase copper bar (30) and the star point copper bar (40) are both at least partially arranged in the insulator (50), and the phase copper bar (30) and the star point copper bar (40) are arranged at intervals, and the phase copper bar (30) is arranged at intervals.

8. Stator winding according to claim 7, characterized in that one end of the insulator (50) in the axial direction of the stator is provided with a limit end (51), which limit end (51) is intended to abut against the end of the stator core (10).

9. A stator, characterized in that the stator comprises a stator core (10) and a stator winding according to any of claims 1-8, the stator winding (20) being at least partly arranged in conductor slots (11) of the stator core (10).

10. A three-phase electric machine, characterized in that it comprises a stator according to claim 9.

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