WO2020252693A1

WO2020252693A1 - Axial stator of axial clearance type rotation motor

Info

Publication number: WO2020252693A1
Application number: PCT/CN2019/091892
Authority: WO
Inventors: 萧家祥; 林继谦; 阎柏均; 姚成福
Original assignee: 威刚科技股份有限公司
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-12-24

Abstract

Disclosed in the present invention is an axial stator of an axial clearance type rotation motor. The axial stator of the axial clearance type rotation motor comprises an annular disc-shaped structure and multiple toothed structures, wherein the annular disc-shaped structure comprises a first surface and a second surface; the multiple toothed structures are arranged on the first surface of the annular disc-shaped structure, surround the central axis of the annular disc-shaped structure, and are arranged at intervals; a groove body is provided between two adjacent toothed structures; one side of each toothed structure is connected to the annular disc-shaped structure, the other side of each toothed structure has a top surface, and the top surface is arc-shaped. In this way, the present invention achieves the technical effect of reducing a cogging torque.

Description

Axial stator of axial gap type rotating electric machine

Technical field

The invention relates to a stator, in particular to an axial stator of an axial gap type rotating electric machine.

Background technique

First of all, there are many different axial gap type rotating machines disclosed in the prior art to be suitable for high torque and/or high power applications. For example, in the "Axial gap type rotating electric machine and its manufacturing method, and flywheel power storage device" disclosed in the patent publication number TW I562509, the stator core is manufactured by winding a stamped magnetic thin strip to form the core.

However, there is still room for improvement in the structure of the stator core of the patent with the publication number TW I562509, and its torque ripple and cogging torque will be more obvious, making the axial flow gap type rotating motor still produce noise when used in the automotive field , Vibration, voltage and current total harmonic distortion (Total Harmonic Distortion, THD) and other issues.

Therefore, how to improve the structure design to improve the influence of the torque ripple and the cogging torque of the axial gap type rotating machine to overcome the above-mentioned defects has become one of the important issues to be solved by this business. .

Summary of the invention

The technical problem to be solved by the present invention is to provide an axial stator of an axial gap type rotating electric machine in view of the shortcomings of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide an axial stator of an axial gap type rotating electric machine, which includes: an annular disc structure and a plurality of tooth structures. The ring-shaped disc structure includes a first surface and a second surface corresponding to the first surface. A plurality of the tooth-like structures are arranged on the first surface of the annular disc-shaped structure, and the plurality of the tooth-like structures surround a central axis of the annular disc-shaped structure and are arranged in intervals, wherein , There is a groove between two adjacent tooth structures. Wherein, one side of each tooth-shaped structure is connected to the annular disc-shaped structure, and the other side of each tooth-shaped structure has a top surface, and the top surface is arc-shaped.

Furthermore, two adjacent tooth-shaped structures are arranged at equal intervals, and each tooth-shaped structure extending in the direction of the central axis extends in a tapered shape.

Furthermore, each of the tooth-like structures includes a tooth bottom connected to the annular disc structure and a tooth top connected to the tooth bottom, and the top surface is located on the tooth top and is curved The top surface of the shape is convexly arranged relative to the top of the tooth.

Furthermore, each of the tooth-like structures includes a tooth bottom connected to the annular disk structure, a tooth top connected to the tooth bottom, and a tooth top disposed on the tooth top and facing a first direction Extended first shoe portion and a second shoe portion arranged on the tooth top and extending toward a second direction, and the tooth top is connected to the first tooth shoe portion and the second tooth Between the boots, the first direction and the second direction are different from each other.

Further, the first tooth shoe portion includes a first side end surface, the second tooth shoe portion includes a second side end surface, and the top surface is connected to the first side end surface and the second side A top end of the arc-shaped top surface is located on the top of the tooth between the end surfaces.

Furthermore, the tooth bottom includes a first side surface and a second side surface corresponding to the first side surface, the first tooth shoe part further includes a first bottom surface, and the second tooth The boot portion further includes a second bottom surface, the first bottom surface is connected between the first side end surface and the first side surface, and the second bottom surface is connected between the second side end surface and the first side surface. Between two side surfaces; wherein, between the first bottom surface and the first side surface there is a first predetermined angle between 70 degrees to 120 degrees, the second bottom surface and the second side There is a second predetermined angle between 70 degrees and 120 degrees between the surfaces.

Furthermore, the tooth top has a first predetermined width, and there is a second predetermined width between a first side end surface of the first tooth shoe part and a second side end surface of the second tooth shoe part , The ratio of the first predetermined width to the second predetermined width is between 0.7 and 1.

Further, there is a first predetermined height between the first surface of the ring-shaped disc structure and the connection between the first tooth shoe portion and the tooth bottom. There is a second predetermined height between the first surface and the top surface, and the ratio of the first predetermined height to the second predetermined height is between 0.8 and 1.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide an axial stator of an axial gap type rotating electric machine, which includes an annular disc structure and a plurality of tooth structures. The ring-shaped disc structure includes a first surface and a second surface corresponding to the first surface. A plurality of the tooth-like structures are arranged on the first surface of the annular disc-shaped structure, and the plurality of the tooth-like structures surround a central axis of the annular disc-shaped structure and are arranged in intervals, wherein , There is a groove between two adjacent tooth structures. Wherein, each of the tooth-like structures includes a tooth bottom connected to the annular disc structure, a tooth top connected to the tooth bottom, and a tooth top disposed on the tooth top and extending toward a first direction A first tooth shoe part and a second tooth shoe part arranged on the tooth top and extending toward a second direction, and the tooth top is connected to the first tooth shoe part and the second tooth shoe part In between, the first direction and the second direction are different from each other.

One of the beneficial effects of the present invention is that the axial stator of the axial gap type rotating electric machine provided by the present invention can pass through "the other side of each tooth structure has a top surface, and the top surface is "Arc shape" technical solution, and achieve the technical effect of reducing the rotational torque. In addition, the axial stator of the axial gap type rotating electric machine provided by the present invention can also be provided with a first tooth shoe part arranged on the top of the tooth and extending toward a first direction and a first tooth shoe part arranged on the tooth. The technical solution of "the second tooth shoe on the top and extending toward a second direction" achieves the technical effect of reducing torque ripple.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description, and are not used to limit the present invention.

Description of the drawings

FIG. 1 is a three-dimensional schematic diagram of the axial stator of the axial gap rotating electric machine according to the first embodiment of the present invention.

2 is another perspective view of the axial stator of the axial gap type rotating electric machine according to the first embodiment of the present invention.

Figure 3 is a schematic cross-sectional view of Figure 1.

4 is a schematic side view of a part of the axial stator of the axial gap type rotating electric machine according to the first embodiment of the present invention.

Fig. 5 is a perspective schematic view of an axial stator of an axial gap type rotating electric machine according to a second embodiment of the present invention.

6 is a perspective exploded schematic view of the axial stator of the axial gap type rotating electric machine according to the third embodiment of the present invention.

Fig. 7 is a perspective schematic view of an axial stator of an axial gap type rotating electric machine according to a fourth embodiment of the present invention.

Fig. 8 is a schematic side view of a part of an axial stator of an axial gap type rotating electric machine according to a fourth embodiment of the present invention.

Fig. 9 is a schematic side view of a part of an axial stator of an axial gap type rotating electric machine according to a fifth embodiment of the present invention.

Fig. 10 is a three-dimensional assembly schematic diagram of an axial stator of an axial gap type rotating electric machine according to a sixth embodiment of the present invention.

Fig. 11 is a perspective exploded schematic view of an axial stator of an axial gap type rotating electric machine according to a sixth embodiment of the present invention.

Fig. 12 is a perspective schematic view of the axial stator of the axial gap type rotating electrical machine provided with coils in the sixth embodiment of the present invention.

Detailed ways

The following is a specific embodiment to illustrate the implementation of the “axial stator of an axial gap type rotating electrical machine” disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although terms such as “first”, “second”, and “third” may be used herein to describe various elements, these elements should not be limited by these terms. These terms are mainly used to distinguish one element from another. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

First embodiment

First, please refer to Figures 1 to 3. Figures 1 and 2 are respectively a three-dimensional schematic diagram of the axial stator of the axial gap type rotating electrical machine according to the first embodiment of the present invention. Figure 3 is the section III-III of Figure 1 Schematic diagram of the cross-section. The present invention provides an axial stator U of an axial gap type rotating electric machine, that is, a stator structure applicable to an axial electric motor. The axial stator U may include: an annular disk-shaped structure 1 and a plurality of tooth-shaped structures 2. The annular disc structure 1 may include a first surface 11 and a second surface 12 corresponding to the first surface 11. A plurality of tooth-shaped structures 2 may be arranged on the first surface 11 of the annular disc-shaped structure 1, and the plurality of tooth-shaped structures 2 may surround a central axis 10 of the annular disc-shaped structure 1 and arranged in an interval. In addition, it is worth noting that the axial stator U of the axial gap type rotating electric machine provided by the first embodiment may be integrally formed, and the material may be metal, but the present invention is not limited to this.

In view of the above, further speaking, there may be a groove 20 between two adjacent tooth-like structures 2, and the two adjacent tooth-like structures 2 may be arranged at equal intervals, and each side facing the central axis 10 The tooth-like structure 2 extending in the direction may extend in a tapered shape. In other words, the projection area formed by the vertical projection of the tooth structure 2 relative to the first surface 11 of the annular disc structure 1 may have a conical shape. In addition, one side of each tooth structure 2 is connected to the annular disk structure 1, and the other side of each tooth structure 2 has a top surface 220. Furthermore, in the first embodiment of the present invention, each tooth structure 2 may include a tooth bottom 21 connected to the annular disk structure 1 and a tooth top 22 connected to the tooth bottom 21, and the top surface 220 may be Located on the tooth top 22, the top surface 220 may be arc-shaped and the arc-shaped top surface 220 is convexly arranged relative to the tooth top. In other words, the top surface 220 is a curved surface, and the curvature of the top surface 220 is between R30 and R120. That is to say, assuming that the top surface 220 is the outer surface of a perfect circle, the radius of the perfect circle can be between 30 mm (millimeter, mm) to 120 mm.

Next, please refer to FIGS. 1 to 3 again, and also to FIG. 4. FIG. 4 is a schematic side view of the axial stator part of the axial gap type rotating machine according to the first embodiment of the present invention. According to the first embodiment of the present invention, each tooth structure 2 includes a tooth bottom 21 connected to the annular disc structure 1, a tooth top 22 connected to the tooth bottom 21, and a tooth top 22 disposed on the tooth top 22 and facing A first shoe portion 23 extending in a first direction and a second shoe portion 24 disposed on the tooth top 22 and extending toward a second direction, and the tooth top 22 is connected to the first shoe portion 23 and the second tooth shoe portion. Between the tooth shoes 24. In addition, the tooth bottom 21 and the tooth top 22 can extend in a predetermined direction (Z direction) relative to the first surface 11 of the annular disc structure 1. Furthermore, the first direction and the second direction are different from each other, and the predetermined direction is perpendicular to the first direction and the second direction.

In view of the above, further, the tooth bottom 21 may include a first side surface 211 and a second side surface 212 corresponding to the first side surface 211, the first tooth shoe portion 23 may be connected to the first side surface 211, and The first shoe portion 23 may be convexly arranged relative to the first side surface 211. In addition, the second tooth shoe portion 24 can be connected to the second side surface 212, and the second tooth shoe portion 24 can be arranged protrudingly relative to the second side surface 212. Thereby, the tooth bottom 21, the tooth top 22, the first tooth shoe 23, and the second tooth shoe 24 can form a T-shape.

In view of the above, further, the first tooth shoe portion 23 may include a first side end surface 231, the second tooth shoe portion 24 may include a second side end surface 241, and the top surface 220 may be connected to the first side end surface 231 and the first side end surface 231. A top end (not numbered in the figure) of the arc-shaped top surface 220 between the two end surfaces 241 can be located on the tooth top 22. In other words, the arc-shaped top surface 220 may be located on the top surfaces of the first tooth shoe part 23, the second tooth shoe part 24 and the tooth top 22.

3 and 4 again, the first tooth shoe portion 23 may further include a first bottom surface 232, and the second tooth shoe portion 24 may further include a second bottom surface 242, the first bottom surface 232 may It is connected between the first side end surface 231 and the first side surface 211, and the second bottom surface 242 can be connected between the second side end surface 241 and the second side surface 212. The first bottom surface 232 and the first side surface 211 may have a first predetermined angle θ1 between 70 degrees and 120 degrees, and the second bottom surface 242 and the second side surface 212 may have a first predetermined angle θ1 between 70 degrees and 120 degrees. The second predetermined angle θ2 between degrees. In addition, it should be noted that, for the convenience of description, in the figure of the present invention, the first predetermined angle θ1 is 90 degrees and the second predetermined angle θ2 is 90 degrees as an example.

In view of the above, further, the tooth top 22 may have a first predetermined width W1, and there may be a first side end surface 231 of the first tooth shoe portion 23 and a second side end surface 241 of the second tooth shoe portion 24 A second predetermined width W2, the ratio of the first predetermined width W1 to the second predetermined width W2 may be between 0.7 and 1.

In view of the above, further, there may be a first predetermined height H1 between the first surface 11 of the annular disc structure 1 and the connection between the first shoe portion 23 and the tooth bottom 21 (not numbered in the figure), There may be a second predetermined height H2 between the first surface 11 and the top surface 220 of the annular disc structure 1, and the ratio of the first predetermined height H1 to the second predetermined height H2 may be between 0.8 and 1.

In view of the above, further speaking, there may be a predetermined distance B between two adjacent tooth structures 2, that is, the first side surface of one tooth structure 2 of the two adjacent tooth structures 2 There is a predetermined distance B between 211 and the second side surface 212 of the other tooth structure 2 of two adjacent tooth structures 2.

Second embodiment

Please refer to FIG. 5, which is a perspective view of the axial stator of the axial gap type rotating electric machine according to the second embodiment of the present invention. It can be seen from the comparison between Figure 5 and Figure 1 that the biggest difference between the second embodiment and the first embodiment is that the axial stator U of the axial gap type rotating machine provided by the second embodiment can be made of a whole roll of silicon steel sheet. Production, that is to say, can be stamped on the silicon steel sheet to form the slot body 20 arranged in sequence to produce a plurality of tooth-like structures 2 arranged in sequence, and then the stamped silicon steel sheet is wound to form a circle The axial stator U of a disc-shaped axial gap type rotating electrical machine. In addition, it should be noted that the other structure of the axial stator U of the axial gap type rotating electric machine provided by the second embodiment is similar to the previous embodiment, and will not be repeated here.

The third embodiment

Please refer to FIG. 6, which is a perspective exploded view of the axial stator of the axial gap type rotating electric machine according to the third embodiment of the present invention. It can be seen from the comparison between FIG. 6 and FIG. 1 that the biggest difference between the third embodiment and the first embodiment is that the annular disc structure 1 and the teeth of the axial stator U of the axial gap type rotating machine provided by the second embodiment are The ring-shaped structure 2 may be provided separately, that is, the annular disc-shaped structure 1 may include a first clamping portion 13 recessed relative to the first surface 11, and the tooth-shaped structure 2 may include a tooth bottom 21. On the second card connector 25. Thereby, the plurality of tooth-like structures 2 can be combined with each other by the second clamping portion 25 and the first clamping portion 13 of the annular disc structure 1 to form an axial stator U of an axial gap type rotating electric machine. In addition, it should be noted that other structures of the axial stator U of the axial gap type rotating electric machine provided by the third embodiment are similar to those of the previous embodiment, and will not be repeated here.

Fourth embodiment

Please refer to FIGS. 7 and 8. FIG. 7 is a perspective view of the axial stator of the axial gap type rotating machine according to the fourth embodiment of the present invention, and FIG. 8 is the axial gap type rotating machine according to the fourth embodiment of the present invention. A schematic side view of the axial part of the stator. From the comparison of FIGS. 7 and 8 with FIGS. 1 and 4, it can be seen that the biggest difference between the fourth embodiment and the first embodiment is that the teeth of the axial stator U of the axial gap type rotating machine provided by the fourth embodiment are The shape structure 2 may include an arc-shaped top surface 220, but does not include the first tooth shoe part 23 and the second tooth shoe part 24. In addition, it should be noted that other structures of the axial stator U of the axial gap type rotating electrical machine provided by the fourth embodiment are similar to those of the previous embodiment, and will not be repeated here.

Fifth embodiment

Please refer to FIG. 9, which is a schematic side view of a part of an axial stator of an axial gap rotating electric machine according to a fifth embodiment of the present invention. It can be seen from the comparison between Figure 9 and Figure 4 that the biggest difference between the fifth embodiment and the first embodiment is that the tooth structure 2 of the axial stator U of the axial gap type rotating machine provided by the fifth embodiment may include a first The one tooth shoe part 23 and the second tooth shoe part 24 do not include an arc-shaped top surface 220. In other words, the top surface 220 of the tooth structure 2 is a flat surface. In addition, it should be noted that other structures of the axial stator U of the axial gap type rotating electric machine provided by the fourth embodiment are similar to those of the previous embodiment, and will not be repeated here.

Sixth embodiment

First, please refer to Figures 10 and 11. Figure 10 is a three-dimensional assembly diagram of the axial stator of the axial gap type rotating electrical machine according to the sixth embodiment of the present invention, and Figure 11 is the axial gap of the sixth embodiment of the present invention. An exploded perspective view of the axial stator of the type rotating electric machine. The axial stator U of the axial gap type rotating machine provided by the foregoing embodiment can be applied to an electric motor to form an axial gap type rotating machine M. The axial gap type rotating machine M can include a central shaft 4, at least An axial stator U and at least one axial rotor 3. The axial rotor 3 may include a rotor body 31 and a plurality of magnetic elements 32 arranged on the rotor body 31, and the axial rotor 3 may be arranged corresponding to the axial stator U, so that the axial rotor 3 can be relative to the axial stator. U turns.

In view of the above, furthermore, although the axial gap type rotating electric machine M shown in FIGS. 11 and 12 is provided with two axial stators U and two axial rotors 3, in other embodiments, only A central shaft 4, an axial stator U and an axial rotor 3 corresponding to the axial stator U are provided.

Next, please refer to FIG. 12, which is a perspective view of the axial stator of the axial gap type rotating electrical machine provided with coils in the sixth embodiment of the present invention. The axial gap type rotating electric machine M may further include a coil 5, and the coil 5 may be wound on the tooth bottom 21 of the tooth structure 2.

Advantages of the embodiment

The content disclosed above is only a preferred and feasible embodiment of the present invention, and does not therefore limit the scope of protection of the claims of the present invention. Therefore, all equivalent technical changes made using the content of the description and drawings of the present invention are included in this invention. Within the protection scope of the claims of the invention.

Claims

An axial stator of an axial gap type rotating electrical machine, characterized in that the axial stator of the axial gap type rotating electrical machine includes:

An annular disc-shaped structure, the annular disc-shaped structure including a first surface and a second surface corresponding to the first surface; and

A plurality of tooth-like structures, a plurality of the tooth-like structures are arranged on the first surface of the annular disc-shaped structure, and the plurality of the tooth-like structures surround a central axis of the annular disc-shaped structure and Arranged at intervals, wherein a groove is provided between two adjacent tooth-shaped structures;

Wherein, one side of each tooth-shaped structure is connected to the annular disc-shaped structure, and the other side of each tooth-shaped structure has a top surface, and the top surface is arc-shaped.
The axial stator of an axial gap type rotating electrical machine according to claim 1, wherein two adjacent tooth structures are arranged at equal intervals, and each of them extends in the direction of the central axis The dentate structure extends in a tapered shape.
The axial stator of an axial gap type rotating electrical machine according to claim 1, wherein each of the toothed structures includes a tooth bottom connected to the annular disc structure and a tooth bottom connected to the tooth bottom The top of the tooth, the top surface is located on the top of the tooth, and the top surface in an arc shape is convexly arranged relative to the top of the tooth.
The axial stator of an axial gap type rotating electric machine according to claim 1, wherein each of the toothed structures includes a tooth bottom connected to the annular disk structure, and a tooth bottom connected to the tooth bottom. The top of the tooth, a first shoe part arranged on the top of the tooth and extending towards a first direction, and a second shoe part arranged on the top of the tooth and extending towards a second direction, and The tooth top is connected between the first tooth shoe part and the second tooth shoe part, and the first direction and the second direction are different from each other.
The axial stator of an axial gap type rotating electric machine according to claim 4, wherein the first tooth shoe portion includes a first side end surface, and the second tooth shoe portion includes a second side end surface, The top surface is connected between the first side end surface and the second side end surface, and a top end of the top surface in an arc shape is located on the tooth top.
The axial stator of the axial gap type rotating electric machine according to claim 5, wherein the tooth bottom includes a first side surface and a second side surface corresponding to the first side surface, and The first shoe portion further includes a first bottom surface, the second shoe portion further includes a second bottom surface, the first bottom surface is connected between the first side end surface and the first side surface , The second bottom surface is connected between the second side end surface and the second side surface; wherein, a gap between the first bottom surface and the first side surface is between 70 degrees and 120 degrees There is a second predetermined angle between 70 degrees and 120 degrees between the second bottom surface and the second side surface.
The axial stator of an axial gap type rotating electrical machine according to claim 4, wherein the tooth top has a first predetermined width, and a first side end surface of the first tooth shoe is connected to the first There is a second predetermined width between a second side end surface of the two-tooth shoe, and the ratio of the first predetermined width to the second predetermined width is between 0.7 and 1.
The axial stator of the axial gap type rotating electric machine according to claim 4, wherein the first surface of the annular disc structure to the distance between the first shoe portion and the tooth bottom There is a first predetermined height between the joints, a second predetermined height is between the first surface and the top surface of the annular disc structure, and the first predetermined height and the second predetermined height The ratio of is between 0.8 and 1.
An axial stator of an axial gap type rotating electrical machine, characterized in that the axial stator of the axial gap type rotating electrical machine includes:

An annular disc-shaped structure, the annular disc-shaped structure including a first surface and a second surface corresponding to the first surface; and

A plurality of tooth-like structures, a plurality of the tooth-like structures are arranged on the first surface of the annular disc-shaped structure, and the plurality of the tooth-like structures surround a central axis of the annular disc-shaped structure and Arranged at intervals, wherein a groove is provided between two adjacent tooth-shaped structures;

Wherein, each of the tooth-like structures includes a tooth bottom connected to the annular disc structure, a tooth top connected to the tooth bottom, and a tooth top disposed on the tooth top and extending toward a first direction A first tooth shoe part and a second tooth shoe part arranged on the tooth top and extending toward a second direction, and the tooth top is connected to the first tooth shoe part and the second tooth shoe part In between, the first direction and the second direction are different from each other.
The axial stator of an axial gap type rotating electric machine according to claim 9, wherein the tooth top has a first predetermined width, and a first side end surface of the first tooth shoe is connected to the first There is a second predetermined width between a second side end surface of the two-tooth shoe, and the ratio of the first predetermined width to the second predetermined width is between 0.7 and 1.