CN216530746U - Stator assembly, axial motor and vehicle - Google Patents

Abstract

The utility model discloses a stator assembly, comprising: the stator comprises a first stator body and a second stator body which are arranged at intervals along the axial direction; wherein, first stator body includes: one side of the first stator yoke part facing the second stator body is provided with a plurality of first stator teeth arranged at intervals along the circumferential direction; at least two first stator teeth of the plurality of first stator teeth are respectively provided with a first connecting hole, and each first connecting hole penetrates through the first stator teeth along the axial direction; the second stator body includes: one side of the second stator yoke part facing the first stator body is provided with a plurality of second stator teeth arranged at intervals along the circumferential direction, at least two second stator teeth in the plurality of second stator teeth are respectively provided with a second connecting hole, and each second connecting hole axially penetrates through the second stator teeth; any one of the first connecting holes is axially staggered from any one of the second connecting holes. According to the utility model, the first connecting hole and the second connecting hole are designed in a staggered manner in the axial direction, so that the electromagnetic vibration and noise brought by the motor in the operation process are reduced.

Description

Stator assembly, axial motor and vehicle

Technical Field

The utility model relates to the technical field of axial motors, in particular to a stator assembly, an axial motor and a vehicle.

Background

Axial motors gain more and more attention due to their advantages of compact structure, high efficiency, high power density, etc. The axial motor is particularly suitable for being applied to occasions requiring high torque density and compact space, such as electric vehicles, renewable energy systems, flywheel energy storage systems, industrial equipment and the like.

The stator core is used as a conduction path and a mechanical support structure of a magnetic field in the axial motor, and has obvious influence on the performance of the axial motor. The stator core of the axial motor is generally designed to be punched so as to fix the stator core and the outer casing together through the hole, but the existence of the hole can increase the cogging torque and the torque ripple in the running process of the axial motor, and the electromagnetic vibration and the noise of the axial motor are also increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a stator assembly, which can reduce the cogging torque and the torque ripple of an axial motor, and reduce the electromagnetic vibration and noise caused by the axial motor in the operation process.

In order to solve the above technical problem, an embodiment of the present invention discloses a stator assembly, including: the stator comprises a first stator body and a second stator body which are arranged at intervals along the axial direction; wherein, first stator body includes: the first stator yoke part is provided with a plurality of first stator teeth arranged at intervals along the circumferential direction on one side, facing the second stator body, of the first stator yoke part; at least two first stator teeth of the plurality of first stator teeth are respectively provided with a first connecting hole, and each first connecting hole penetrates through the first stator teeth along the axial direction; the second stator body includes: a plurality of second stator teeth arranged at intervals along the circumferential direction are arranged on one side, facing the first stator body, of the second stator yoke, and the plurality of second stator teeth and the plurality of first stator teeth are in one-to-one correspondence along the axial direction; at least two second stator teeth in the plurality of second stator teeth are respectively provided with a second connecting hole, and each second connecting hole axially penetrates through the second stator teeth; any one of the first connecting holes is axially staggered from any one of the second connecting holes.

By adopting the technical scheme, the first connecting holes formed in the first stator teeth and the second connecting holes formed in the second stator teeth are staggered in the axial direction, so that the cogging torque and the torque pulsation of the axial motor can be reduced, and the electromagnetic vibration and the noise caused by the axial motor in the running process can be reduced.

Preferably, the number of the first connection holes is equal to the number of the second connection holes.

Preferably, the plurality of first connection holes are evenly distributed on the first stator teeth along the circumferential direction.

Preferably, the plurality of second connecting holes are uniformly distributed on the second stator teeth along the circumferential direction.

Preferably, the first stator teeth arranged adjacently or at intervals are respectively provided with a first connecting hole along the circumferential direction.

Preferably, the second stator teeth arranged adjacently or at intervals are respectively provided with second connecting holes along the circumferential direction.

Preferably, a first open slot is arranged between two adjacent first stator teeth, and the first open slot extends along the radial direction; and a second open slot is arranged between two adjacent second stator teeth and extends along the radial direction.

Preferably, the first winding surrounds the periphery of each first stator tooth, and the first winding part is accommodated in the first open slot; the second winding surrounds the periphery of each second stator tooth, and the second winding part is contained in the second open slot.

By adopting the technical scheme, the cogging torque and the torque pulsation of the axial motor can be reduced, and the electromagnetic vibration and the noise caused by the operation of the axial motor are reduced; the stator teeth are conveniently wound, and the cost of manual winding is reduced.

The utility model also provides an axial motor comprising the technical scheme and a vehicle comprising the axial motor, and the electromagnetic vibration and noise brought by the axial motor in the operation process are reduced.

Drawings

Fig. 1 is a schematic view of an axial motor provided in embodiment 1.

Fig. 2 is a schematic view of an axial motor provided in embodiment 2.

Fig. 3 is a schematic view of the second stator body provided in embodiment 2 after being connected to the lower case.

Fig. 4 is a comparison graph of torque ripple detected by the axial motor provided in example 1 and example 2 under a simulation experiment.

Fig. 5 is a comparison graph of cogging torque measured in simulation experiments for the axial motors provided in examples 1 and 2.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the utility model will be described in conjunction with the preferred embodiments, it is not intended that the features of the utility model be limited to these embodiments. On the contrary, the intention of the novel description to be incorporated into the embodiments is to cover alternatives or modifications which may be extended in accordance with the appended claims. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The utility model may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, and are only used for convenience in describing and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

Referring to fig. 1, according to an axial motor 1 provided in one possible embodiment of the present application, the axial motor 1 includes a front stator core 11 and a rear stator core 13 that are axially spaced apart from each other.

The "axial direction" referred to herein refers to the extending direction of the rotating shaft, i.e., the AX direction shown in fig. 1.

The front stator core 11 includes 24 first stator teeth 111 spaced along the circumferential direction, the first stator teeth 111 are respectively provided with first connection holes 1111 at positions A, B, C, D, E, F shown in fig. 1, and the 6 first connection holes 1111 are used to fix the front stator core 11 to an upper housing (not shown).

As used herein, "circumferential" refers to the direction in which the periphery of each component extends, circumferentially around the axial direction, i.e., the direction T shown in FIG. 1.

The rear stator core 13 includes 24 second stator teeth 131 arranged at intervals in the circumferential direction, the second stator teeth 131 are respectively provided with second connection holes 1311 at positions shown as a, b, c, d, e, and f in fig. 1 (the positions of the second connection holes at f and the positions of f are not shown in the figure), and 6 second connection holes 1311 are used for fixing the rear stator core 13 to a lower case (not shown in the figure).

The axial motor 1 further comprises a first winding 15, a second winding 17 and a rotor 19 in the axial direction, the first winding 15 is arranged between the front stator iron core 11 and the rotor 19 along the axial direction, the second winding 17 is arranged between the rear stator iron core 13 and the rotor 19 along the axial direction, the first winding 15 winds the first stator teeth 111 one by one, and the second winding 17 winds the second stator teeth 131 one by one.

The first connection holes 1111 and the second connection holes 1311 are axially aligned one by one, that is, the first connection holes 1111 provided at the a position of the first stator tooth 111 and the second connection holes 1311 provided at the a position of the second stator tooth 131 are axially aligned; first connection hole 1111 provided at the B position of first stator tooth 111 is aligned with second connection hole 1311 provided at the B position of second stator tooth 131; first connection hole 1111 provided at the C position of first stator tooth 111 is aligned with second connection hole 1311 provided at the C position of second stator tooth 131; first connection hole 1111 provided at D position of first stator tooth 111 is aligned with second connection hole 1311 provided at D position of second stator tooth 131; first connection hole 1111 provided at the E position of first stator tooth 111 is aligned with second connection hole 1311 provided at the E position of second stator tooth 131; the first connection hole 1111 provided at the F position of the first stator tooth 111 is aligned with the second connection hole provided at the F position of the second stator tooth 131.

The axial motor 1 with the design can bring large cogging torque and torque ripple during operation, and the electromagnetic vibration and noise of the axial motor 1 are increased.

Therefore, the application provides another axial motor 2, which can reduce the cogging torque and the torque ripple of the axial motor 2 and reduce the electromagnetic vibration and the noise brought by the axial motor 2 in the operation process.

Example 2

With reference to fig. 2, an axial electric machine 2 according to the utility model comprises a stator assembly (not shown in the figures) comprising: a first stator body 21 and a second stator body 23 provided at intervals in the axial direction (indicated by AX in fig. 2); wherein, the first stator body 21 includes: a first stator yoke portion 211, a side of the first stator yoke portion 211 facing the second stator body 23 is provided with 24 first stator teeth 213 arranged at intervals in a circumferential direction (indicated by a T direction in fig. 2); 6 first stator teeth 213 of the 24 first stator teeth 213 are respectively provided with a first connection hole 2131, the 6 first connection holes 2131 are respectively arranged at A, B, C, D, E, F, and each first connection hole 2131 axially penetrates through the first stator teeth 213;

here, the number of the first stator teeth 213 is not limited to 24, and the number of the first stator teeth 213 may be N₁，N₁Satisfy ≧ 2, the number of the first connection holes 2131 can be M₁,M₁Satisfies the following conditions: 2 is less than or equal to M₁≤N₁。

The second stator body 23 includes: one side of the second stator yoke 231 facing the first stator body 21 is provided with 24 second stator teeth 233 arranged at intervals along the circumferential direction, and the 24 second stator teeth 233 and the 24 first stator teeth 213 are in one-to-one correspondence along the axial direction; 6 second stator teeth 233 of the 24 second stator teeth 233 are respectively provided with second connection holes 2331, and the 6 second connection holes 2331 are respectively arranged at positions a, b, c, d, e and f. (as shown in the positions a, b, c and d in fig. 2, the second connecting holes at the positions e and f and the positions e and f are not shown in the drawings) the second connecting hole 2331 penetrates through the second stator tooth 233 along the axial direction;

here, the number of the second stator teeth 233 is not limited to 24, and the number of the second stator teeth 233 may be N₂，N₂Satisfies ≧ 2, the number of the second connecting holes 2331 may be M₂,M₂Satisfies the following conditions: 2 is less than or equal to M₂≤N₂。

The first coupling hole 2131 is used to fix the first stator body 21 to an upper case (not shown), and in conjunction with fig. 3, the second coupling hole 2331 is used to fix the second stator body 23 to a lower case 3.

Any one of the first connection holes 2131 is axially staggered from any one of the second connection holes 2331, that is, the projections of any one of the first connection holes 2131 and any one of the second connection holes 2331 in the axial direction do not overlap, or any one of the first connection holes 2131 and any one of the second connection holes 2331 are not axially aligned.

For example, any one of the first connection hole 2131 shown in the a position, the first connection hole 2131 shown in the B position, the first connection hole 2131 shown in the C position, the first connection hole 2131 shown in the D position, the first connection hole 2131 shown in the E position, and the first connection hole 2131 shown in the F position is axially shifted from any one of the second connection hole 2331 shown in the a position, the second connection hole 2331 shown in the B position, the second connection hole 2331 shown in the C position, the second connection hole 2331 shown in the D position, the second connection hole 2331 shown in the E position, and the second connection hole shown in the F position.

Due to the staggered design of any one first connecting hole 2131 and any one second connecting hole 2331 in the axial direction, the spatial distribution of air gap magnetic conductance is changed, the number of harmonics is increased, the amplitude of the harmonics is changed, the cogging torque and the torque ripple of the axial motor 2 are reduced, and the electromagnetic vibration and the noise of the axial motor 2 are reduced.

In some possible embodiments, the number of the first connection holes 2131 is equal to the number of the second connection holes 2331. The fixing strength of the first stator body 21 and the upper shell is equal to that of the second stator body 23 and the lower shell 3, and the suction force of the rotor 29 borne by the first stator body 21 and the second stator body 23 is equal.

In some possible embodiments, the plurality of first connection holes 2131 are uniformly distributed on the first stator tooth 213 along the circumferential direction, so that the regularity of the permeability of the air gap is changed, and thus the amplitude and the number of harmonics can be changed toward a favorable direction.

In some possible embodiments, the plurality of second connecting holes 2331 are uniformly distributed on the second stator tooth 233 along the circumferential direction, so that the air gap permeance is changed regularly, thereby changing the amplitude and the number of harmonics toward a favorable direction.

In some possible embodiments, the first stator teeth 213 disposed adjacently or at intervals are respectively provided with first connection holes 2131 in a circumferential direction. Whether the first connection holes 2131 are circumferentially adjacently disposed or circumferentially spaced is determined according to a mechanical structure in which the first stator body 21 is fixed to the upper case.

For example, in the present embodiment, the first connection hole 2131 at the a position is separated from the first connection hole 2131 at the B position by three first stator teeth 213, and the first connection hole 2131 at the a position is separated from the first connection hole 2131 at the C position by six first stator teeth 213.

In some possible embodiments, the second stator teeth 233, which are disposed adjacently or at intervals, are respectively provided with second coupling holes 2331 in the circumferential direction. Whether the second coupling holes 2131 are circumferentially adjacently disposed or circumferentially spaced is determined according to a mechanical structure in which the second stator body 23 is fixed to the lower case 3.

For example, in the present embodiment, the second connecting hole 2331 at the a position is spaced from the second connecting hole 2331 at the b position by three second stator teeth 233, and the second connecting hole 2331 at the a position is spaced from the second connecting hole 2331 at the c position by six second stator teeth 233.

In some possible embodiments, a first open groove 215 is disposed between two adjacent first stator teeth 213, and the first open groove 215 extends in a radial direction; a second open groove 235 is provided between two adjacent second stator teeth 233, and the second open groove 235 extends in the radial direction.

The term "radial" as used herein refers to a direction in a plane perpendicular to the axial direction, which is taken from a point where the rotation axis of the rotating shaft intersects the plane, i.e., the R direction shown in fig. 2.

In some possible embodiments, the first winding 25 surrounds the periphery of each first stator tooth 213, and the first winding 25 is partially accommodated in the first opening groove 215; the second winding 27 surrounds the outer periphery of each of the second stator teeth 233, and the second winding 27 is partially received in the second open slot 235.

The design of the first opening groove 215 facilitates the surrounding of the first winding 25 at the periphery of the first stator tooth 213, reduces the cost of manual winding, and simultaneously facilitates the detachment of the first winding 25 from the first stator tooth 213, thereby saving labor hours and cost.

The design of the second opening groove 235 also facilitates the second winding 27 to be wound around the periphery of the second stator tooth 233, so that the cost of manual winding is reduced, and meanwhile, the second winding 27 is conveniently dismounted from the second stator tooth 233, so that the working time is saved, and the cost is saved.

The utility model also provides a vehicle comprising the axial motor 2, which reduces the electromagnetic vibration and noise brought by the axial motor 2 in the operation process.

Finite element simulation experiments are performed on the axial motor 1 provided in embodiment 1 and the axial motor 2 provided in embodiment 2, and the electromagnetic torque and the cogging torque of the axial motors 1 and 2 are respectively detected. And (4) calculating the cogging torque and the electromagnetic torque by using finite element simulation software and adopting a virtual power method.

Referring to fig. 4, a comparison graph of torque curves of the axial motor 1 and the axial motor 2 is shown, wherein the abscissa represents the motor operating time, and the ordinate represents the magnitude of the electromagnetic torque. It can be seen that the electromagnetic torque fluctuation range of the axial motor 2 provided in example 2 is much lower than that of the axial motor 1 provided in example 1, which means that the torque ripple of the axial motor 2 provided in example 2 is much lower than that of the axial motor 1 provided in example 1.

Referring to fig. 5, a comparison graph of cogging torque curves of the axial motor 1 and the axial motor 2 is shown, where the abscissa represents the motor running time and the ordinate represents the cogging torque. It can be seen that the cogging torque of the axial motor 2 provided in example 2 is smaller than that of the axial motor 1 provided in example 1 in one cogging torque cycle.

The fact that the torque ripple and the cogging torque of the embodiment 2 are small means that the axial motor 2 provided by the embodiment 2 brings small electromagnetic vibration and noise during the operation.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the utility model, taken in conjunction with the specific embodiments thereof, and that no limitation of the utility model is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the utility model.

Claims (10)

1. A stator assembly, comprising: the stator comprises a first stator body and a second stator body which are arranged at intervals along the axial direction; wherein the content of the first and second substances,

the first stator body includes:

a first stator yoke portion, wherein one side of the first stator yoke portion facing the second stator body is provided with a plurality of first stator teeth arranged at intervals along the circumferential direction; at least two first stator teeth in the plurality of first stator teeth are respectively provided with a first connecting hole, and each first connecting hole penetrates through the first stator teeth along the axial direction;

the second stator body includes:

a second stator yoke portion, wherein one side of the second stator yoke portion facing the first stator body is provided with a plurality of second stator teeth arranged at intervals along the circumferential direction, and the plurality of second stator teeth and the plurality of first stator teeth are in one-to-one correspondence along the axial direction; at least two of the second stator teeth are respectively provided with a second connecting hole, and each second connecting hole penetrates through the second stator teeth along the axial direction;

any one of the first connecting holes and any one of the second connecting holes are staggered along the axial direction.

2. The stator assembly of claim 1, wherein the number of first connection holes is equal to the number of second connection holes.

3. The stator assembly of claim 1, wherein the plurality of first connection holes are evenly distributed on the first stator tooth in the circumferential direction.

4. The stator assembly of claim 1, wherein the plurality of second coupling holes are evenly distributed along the circumferential direction on the second stator teeth.

5. The stator assembly according to claim 1, wherein the first stator teeth arranged adjacently or at intervals are respectively provided with the first connection holes along the circumferential direction.

6. The stator assembly according to claim 1, wherein the second stator teeth adjacently or alternately arranged are respectively provided with the second coupling holes along the circumferential direction.

7. The stator assembly of claim 1, wherein a first slot is disposed between two adjacent first stator teeth, the first slot extending in a radial direction; and a second open slot is arranged between every two adjacent second stator teeth and extends along the radial direction.

8. The stator assembly according to claim 7 wherein a first winding surrounds an outer periphery of each of said first stator teeth, said first winding portion being received in said first slot; and a second winding surrounds the periphery of each second stator tooth, and the second winding part is accommodated in the second open slot.

9. An axial electrical machine, characterized in that it comprises a stator assembly according to any of claims 1-8.

10. A vehicle comprising an axial electric machine according to claim 9.

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