CN112117838B

CN112117838B - Axial stator of axial gap type rotating electrical machine

Info

Publication number: CN112117838B
Application number: CN201910532253.6A
Authority: CN
Inventors: 萧家祥; 林继谦; 阎柏均; 姚成福
Original assignee: A Data Technology Co Ltd
Current assignee: A Data Technology Co Ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2022-05-06
Anticipated expiration: 2039-06-19
Also published as: CN112117838A

Abstract

The invention discloses an axial stator of an axial gap type rotating electrical machine, comprising: an annular disk structure and a plurality of tooth structures. The annular disc structure includes a first surface and a second surface. The plurality of tooth-shaped structures are arranged on the first surface of the annular disc-shaped structure, and the plurality of tooth-shaped structures surround a central axis of the annular disc-shaped structure and are arranged at intervals. A groove body is arranged between two adjacent tooth-shaped structures. One side of each tooth-shaped structure is connected with the annular disc-shaped structure, and the other side of each tooth-shaped structure is provided with a top surface which is arc-shaped. Therefore, the invention achieves the technical effect of reducing cogging torque.

Description

Axial stator of axial gap type rotating electrical machine

Technical Field

The present invention relates to a stator, and more particularly to an axial stator of an axial gap type rotating electrical machine.

Background

First, various axial gap type rotating electrical machines have been disclosed in the prior art to be suitable for high torque and/or high power applications. For example, in the "axial-flow gap type rotating electrical machine and the manufacturing method thereof, flywheel electric storage device" disclosed in the patent publication TW I562509, the stator core is manufactured by winding a punched magnetic thin strip to form a core.

However, the structure of the stator core disclosed in the patent No. TW I562509 still has room for improvement, and the torque ripple and cogging torque are significant, so that when the axial gap type rotating electric machine is applied in the field of vehicles, the problems of noise, vibration, Total Harmonic Distortion (THD) of voltage and current still occur.

Therefore, it is an important subject to be solved by the industry to improve the influence caused by the torque ripple and cogging torque of the axial gap type rotating electrical machine by improving the structural design.

Disclosure of Invention

The present invention is directed to an axial stator of an axial gap type rotating electrical machine, which overcomes the disadvantages of the prior art.

In order to solve the above-described technical problem, one of the technical solutions of the present invention is to provide an axial stator of an axial gap type rotating electrical machine, including: an annular disk structure and a plurality of tooth structures. The annular disc-shaped structure comprises a first surface and a second surface corresponding to the first surface. The plurality of tooth-shaped structures are arranged on the first surface of the annular disc-shaped structure, the plurality of tooth-shaped structures surround a central axis of the annular disc-shaped structure and are arranged at intervals, and a groove body is arranged between every two adjacent tooth-shaped structures. One side of each tooth-shaped structure is connected with the annular disc-shaped structure, and the other side of each tooth-shaped structure is provided with a top surface which is arc-shaped.

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

Still further, each of the tooth-like structures includes a tooth bottom portion connected to the annular disk-like structure and a tooth top portion connected to the tooth bottom portion, the top surface is located on the tooth top portion, and the top surface having an arc shape is disposed in a convex shape with respect to the tooth top portion.

Further, each of the tooth structures includes a tooth bottom portion connected to the annular disk-shaped structure, a tooth top portion connected to the tooth bottom portion, a first tooth shoe portion disposed on the tooth top portion and extending toward a first direction, and a second tooth shoe portion disposed on the tooth top portion and extending toward a second direction, and the tooth top portion is connected between the first tooth shoe portion and the second tooth shoe portion, the first direction and the second direction being different from each other.

Still further, the first tooth shoe includes a first side face and the second tooth shoe includes a second side face, the top surface is connected between the first side face and the second side face, and a tip of the top surface that is arc-shaped is located on the tooth top.

Further, the tooth bottom portion includes a first side surface and a second side surface corresponding to the first side surface, the first tooth shoe portion further includes a first bottom surface, the second tooth 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, and the second bottom surface is connected between the second side end surface and the second side surface; the first bottom surface and the first side surface form a first preset included angle between 70 degrees and 120 degrees, and the second bottom surface and the second side surface form a second preset included angle between 70 degrees and 120 degrees.

Further, the tooth tip has a first predetermined width, a second predetermined width is provided between a first lateral end surface of the first tooth shoe and a second lateral end surface of the second tooth shoe, and a ratio of the first predetermined width to the second predetermined width is between 0.7 and 1.

Still further, the first surface of the annular disc shaped structure has a first predetermined height to a junction between the first tooth shoe and the tooth bottom portion, the first surface of the annular disc shaped structure has a second predetermined height to the top surface, and a ratio of the first predetermined height to the second predetermined height is between 0.8 and 1.

In order to solve the above-mentioned technical problem, another aspect of the present invention is to provide an axial stator of an axial gap type rotating electrical machine, including: an annular disk structure and a plurality of tooth structures. The annular disc-shaped structure comprises a first surface and a second surface corresponding to the first surface. The plurality of tooth-shaped structures are arranged on the first surface of the annular disc-shaped structure, the plurality of tooth-shaped structures surround a central axis of the annular disc-shaped structure and are arranged at intervals, and a groove body is arranged between every two adjacent tooth-shaped structures. Wherein each of the tooth-like structures includes a tooth bottom portion connected to the annular disk-like structure, a tooth top portion connected to the tooth bottom portion, a first tooth shoe portion disposed on the tooth top portion and extending toward a first direction, and a second tooth shoe portion disposed on the tooth top portion and extending toward a second direction, and the tooth top portion is connected between the first tooth shoe portion and the second tooth shoe portion, and the first direction and the second direction are different from each other.

One of the advantages of the present invention is that the axial stator of the axial gap type rotating electrical machine provided by the present invention can achieve the technical effect of reducing cogging torque by the technical scheme that the other side of each tooth-shaped structure has a top surface, and the top surface is arc-shaped. In addition, the axial stator of the axial gap type rotating electrical machine provided by the present invention can achieve the technical effect of reducing torque ripple by the technical scheme of "a first tooth shoe portion disposed on the tooth top and extending toward a first direction and a second tooth shoe portion disposed on the tooth top and extending toward a second direction".

For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.

Drawings

Fig. 1 is a perspective view of an axial stator of an axial gap type rotating electrical machine according to a first embodiment of the present invention.

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

Fig. 3 is a schematic cross-sectional view of fig. 1.

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

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

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

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

Fig. 8 is a side view schematically showing a part of an axial stator of an axial gap type rotating electrical 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 electrical machine according to a fifth embodiment of the present invention.

Fig. 10 is a perspective assembly view of an axial stator of an axial gap type rotating electrical machine according to a sixth embodiment of the present invention.

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

Fig. 12 is a perspective view schematically showing an axial stator of an axial gap type rotating electrical machine according to a sixth embodiment of the present invention, the axial stator being provided with coils.

Detailed Description

The following is a description of the embodiments of the present disclosure relating to an axial stator of an axial gap type rotating electrical machine, with specific embodiments, and those skilled in the art will understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used primarily to distinguish one element from another. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.

First embodiment

First, referring to fig. 1 to 3, fig. 1 and 2 are respectively a perspective view of an axial stator of an axial gap type rotating electrical machine according to a first embodiment of the present invention, and fig. 3 is a cross-sectional view of a section III-III of fig. 1. The present invention provides an axial stator U of an axial gap type rotating electrical machine, that is, a stator structure applicable to an axial motor. The axial stator U may include: an annular disk-shaped structure 1, and a plurality of tooth-like structures 2. The annular disc-shaped structure 1 may comprise a first surface 11 and a second surface 12 corresponding to the first surface 11. The plurality of tooth structures 2 may be disposed on the first surface 11 of the annular disc structure 1, and the plurality of tooth structures 2 may surround a central axis 10 of the annular disc structure 1 and be arranged at intervals. It should be noted that the axial stator U of the axial gap type rotating electrical machine provided in the first embodiment may be integrally formed, and the material thereof may be metal, but the invention is not limited thereto.

In view of the above, a slot 20 may be disposed between two adjacent tooth structures 2, the two adjacent tooth structures 2 may be disposed at equal intervals, and each tooth structure 2 extending toward the central axis 10 may extend in a tapered manner. In other words, the projection area formed by the perpendicular projection of the tooth-like structure 2 with respect to the first surface 11 of the annular disc-shaped structure 1 may have a conical shape. In addition, one side of each tooth structure 2 is connected to the annular disc structure 1, and the other side of each tooth structure 2 has a top surface 220. Further, according to the first embodiment of the present invention, each of the tooth-like structures 2 may include a tooth bottom portion 21 connected to the annular disc-shaped structure 1 and a tooth top portion 22 connected to the tooth bottom portion 21, the top surface 220 may be located on the tooth top portion 22, and the top surface 220 may be arc-shaped, and the arc-shaped top surface 220 is disposed in a convex manner with respect to the tooth top portion. 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, assuming that the top surface 220 is a perfect circle, the radius of the perfect circle may be between 30 millimeters (mm) and 120 mm.

Next, referring to fig. 1 to 3 and fig. 4 together, fig. 4 is a schematic side view of a portion of an axial stator of an axial gap type rotating electrical machine according to a first embodiment of the present invention. In the first embodiment of the present invention, each of the tooth-like structures 2 includes a tooth bottom portion 21 connected to the annular disc-shaped structure 1, a tooth crest 22 connected to the tooth bottom portion 21, a first tooth shoe 23 disposed on the tooth top portion 22 and extending in a first direction, and a second tooth shoe 24 disposed on the tooth top portion 22 and extending in a second direction, and the tooth crest 22 is connected between the first tooth shoe 23 and the second tooth shoe 24. Furthermore, the tooth bottom portion 21 and the tooth top portion 22 may extend in a predetermined direction (Z direction) with respect to the first surface 11 of the annular disc structure 1. Further, 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 23 may be connected to the first side surface 211, and the first tooth shoe 23 may be convexly disposed with respect to the first side surface 211. Further, the second tooth shoe 24 may be connected to the second side surface 212, and the second tooth shoe 24 may be disposed in a convex manner relative to the second side surface 212. Thereby, the tooth bottom portion 21, the tooth top portion 22, the first tooth shoe portion 23 and the second tooth shoe portion 24 can be formed in a T-shape.

Further, the first tooth shoe 23 may include a first side surface 231, the second tooth shoe 24 may include a second side surface 241, the top surface 220 may be connected between the first side surface 231 and the second side surface 241, and a top end (not numbered) of the arc-shaped top surface 220 may be located on the tooth top 22. In other words, the top surface 220 having an arc shape may be located on the top surfaces of the first tooth shoe 23, the second tooth shoe 24, and the tooth crest 22.

Referring to fig. 3 and 4, the first tooth shoe 23 can further include a first bottom surface 232, the second tooth shoe 24 can further include a second bottom surface 242, the first bottom surface 232 can be connected between the first side surface 231 and the first side surface 211, and the second bottom surface 242 can be connected between the second side surface 241 and the second side surface 212. The first bottom surface 232 and the first side surface 211 may have a first predetermined included angle θ 1 between 70 degrees and 120 degrees, and the second bottom surface 242 and the second side surface 212 may have a second predetermined included angle θ 2 between 70 degrees and 120 degrees. For convenience of description, it should be noted that the first predetermined included angle θ 1 is 90 degrees and the second predetermined included angle θ 2 is 90 degrees in the drawings of the present invention as an example.

Further, the tooth top 22 may have a first predetermined width W1, a second predetermined width W2 may be provided between a first side surface 231 of the first tooth shoe 23 and a second side surface 241 of the second tooth shoe 24, and a ratio of the first predetermined width W1 to the second predetermined width W2 may be between 0.7 and 1.

In keeping with the above, further, the annular disc structure 1 may have a first predetermined height H1 from the first surface 11 to the connection (not numbered) between the first tooth shoe 23 and the tooth bottom 21, a second predetermined height H2 from the first surface 11 to the top surface 220 of the annular disc structure 1, and a 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, it is further noted that a predetermined distance B may be provided between two adjacent tooth structures 2, that is, a predetermined distance B is provided between the first side surface 211 of one tooth structure 2 of two adjacent tooth structures 2 and the second side surface 212 of the other tooth structure 2 of two adjacent tooth structures 2.

Second embodiment

Referring to fig. 5, fig. 5 is a perspective view of an axial stator of an axial gap type rotating electrical machine according to a second embodiment of the present invention. As can be seen from the comparison between fig. 5 and fig. 1, the greatest difference between the second embodiment and the first embodiment is that the axial stator U of the axial gap type rotating electrical machine provided in the second embodiment can be manufactured by using a whole roll of silicon steel sheet, that is, the silicon steel sheet can be punched to form the slot bodies 20 arranged in sequence, so as to generate a plurality of tooth-like structures 2 arranged in sequence, and then the punched silicon steel sheet is wound to form the axial stator U of the disc-shaped axial gap type rotating electrical machine. It should be noted that other configurations of the axial stator U of the axial gap type rotating electrical machine provided in the second embodiment are similar to those of the foregoing embodiments, and are not described herein again.

Third embodiment

Referring to fig. 6, fig. 6 is a schematic perspective exploded view of an axial stator of an axial gap type rotating electrical machine according to a third embodiment of the present invention. As can be seen from a comparison between fig. 6 and fig. 1, the greatest difference between the third embodiment and the first embodiment is that the annular disc structure 1 and the tooth structure 2 of the axial stator U of the axial gap type rotating electrical machine provided by the second embodiment may be separately disposed, that is, the annular disc structure 1 may include a first engaging portion 13 recessed with respect to the first surface 11 and the tooth structure 2 may include a second engaging portion 25 disposed on the tooth bottom portion 21. Therefore, the plurality of tooth-shaped structures 2 can be combined with the first clamping portion 13 of the annular disc-shaped structure 1 by the second clamping portion 25 to form an axial stator U of the axial gap type rotating motor. It should be noted that other structures of the axial stator U of the axial gap type rotating electrical machine provided in the third embodiment are similar to those of the foregoing embodiments, and are not described herein again.

Fourth embodiment

Referring to fig. 7 and 8, fig. 7 is a perspective view of an axial stator of an axial gap type rotating electrical machine according to a fourth embodiment of the present invention, and fig. 8 is a side view of a portion of the axial stator of the axial gap type rotating electrical machine according to the fourth embodiment of the present invention. As can be seen from a comparison between fig. 7 and 8 and fig. 1 and 4, the greatest difference between the fourth embodiment and the first embodiment is that the tooth structure 2 of the axial stator U of the axial gap type rotating electrical machine provided by the fourth embodiment may include the arc-shaped top surface 220 instead of the first tooth shoe 23 and the second tooth shoe 24. It should be noted that other structures of the axial stator U of the axial gap type rotating electrical machine provided in the fourth embodiment are similar to those of the foregoing embodiments, and are not described herein again.

Fifth embodiment

Referring to fig. 9, fig. 9 is a side view of a portion of an axial stator of an axial gap type rotating electrical machine according to a fifth embodiment of the present invention. As can be seen from a comparison between fig. 9 and fig. 4, 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 electrical machine provided by the fifth embodiment may include the first tooth shoe 23 and the second tooth shoe 24, instead of the top surface 220 having an arc shape. That is, the top surface 220 of the tooth structure 2 is a plane. It should be noted that other structures of the axial stator U of the axial gap type rotating electrical machine provided in the fourth embodiment are similar to those of the foregoing embodiments, and are not described herein again.

Sixth embodiment

First, referring to fig. 10 and 11, fig. 10 is a perspective assembly view of an axial stator of an axial gap type rotating electrical machine according to a sixth embodiment of the present invention, and fig. 11 is a perspective exploded view of the axial stator of the axial gap type rotating electrical machine according to the sixth embodiment of the present invention. The axial stator U of the axial gap type rotating electrical machine provided in the foregoing embodiment can be applied to an electric motor to form an axial gap type rotating electrical machine M, which can include a central shaft 4, at least one 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 disposed on the rotor body 31, and the axial rotor 3 may be disposed corresponding to the axial stator U such that the axial rotor 3 can rotate relative to the axial stator U.

In addition, although the axial gap type rotating electrical machine M shown in fig. 11 and 12 is provided with two axial stators U and two axial rotors 3, in another embodiment, only the center shaft 4, one axial stator U, and one axial rotor 3 corresponding to the axial stator U may be provided.

Next, referring to fig. 12, fig. 12 is a schematic perspective view of an axial stator of an axial gap type rotating electrical machine according to a sixth embodiment of the present invention, the axial stator having coils. The axial gap type rotary 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.

Advantageous effects of the embodiments

The disclosure is only a preferred embodiment of the invention, and is not intended to limit the scope of the claims, so that all technical equivalents and modifications using the contents of the specification and drawings are included in the scope of the claims.

Claims

1. An axial stator of an axial gap type rotating electrical machine, characterized by comprising:

an annular disk-shaped structure comprising a first surface and a second surface corresponding to the first surface; and

the tooth-shaped structures are arranged on the first surface of the annular disc-shaped structure, the tooth-shaped structures surround a central axis of the annular disc-shaped structure and are arranged at intervals, and a groove body is formed between every two adjacent tooth-shaped structures;

wherein one side of each of the tooth structures is connected to the annular disc-shaped structure, the other side of each of the tooth structures has a top surface, the top surface is a curved surface with a single arc, the curvature of the top surface is between R30 and R120, and the top surface is arranged in a direction perpendicular to the central axis;

wherein each of the tooth-like structures includes a tooth bottom portion connected to the annular disc-shaped structure, a tooth top portion connected to the tooth bottom portion, a first tooth shoe portion disposed on the tooth top portion and extending toward a first direction, and a second tooth shoe portion disposed on the tooth top portion and extending toward a second direction, and the tooth top portion is connected between the first tooth shoe portion and the second tooth shoe portion, the first direction and the second direction are different from each other, the tooth top portion has a first predetermined width, a first lateral end surface of the first tooth shoe portion and a second lateral end surface of the second tooth shoe portion have a second predetermined width, and a ratio of the first predetermined width to the second predetermined width is between 0.7 and 1.

2. The axial stator of an axial gap type rotating electric machine according to claim 1, wherein adjacent two of the tooth structures are arranged at equal intervals, and each of the tooth structures extending in the direction of the center axis extends in a tapered shape.

3. The axial stator of an axial gap type rotary electric machine according to claim 1, wherein each of the tooth structures includes a tooth bottom portion connected to the annular disk-shaped structure and a tooth top portion connected to the tooth bottom portion, the top surface is located on the tooth top portion, and the top surface in an arc shape is provided in a convex shape with respect to the tooth top portion.

4. The axial stator of an axial gap type rotary electric machine according to claim 1, wherein the first tooth shoe portion includes a first side end face, the second tooth shoe portion includes a second side end face, the top surface is connected between the first side end face and the second side end face, and a tip end of the top surface in an arc shape is located on the tooth top portion.

5. The axial stator of an axial gap type rotary electric machine according to claim 4, wherein the tooth bottom portion includes a first side surface and a second side surface corresponding to the first side surface, the first tooth shoe portion further includes a first bottom surface, the second tooth 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, and the second bottom surface is connected between the second side end surface and the second side surface; the first bottom surface and the first side surface form a first preset included angle between 70 degrees and 120 degrees, and the second bottom surface and the second side surface form a second preset included angle between 70 degrees and 120 degrees.

6. The axial stator of an axial gap type electric rotating machine according to claim 1, wherein a first predetermined height is provided between the first surface of the annular disc-shaped structure to a junction between the first tooth shoe and the tooth bottom portion, a second predetermined height is provided between the first surface of the annular disc-shaped structure to the top surface, and a ratio of the first predetermined height to the second predetermined height is between 0.8 and 1.

7. An axial stator of an axial gap type rotating electrical machine, characterized by comprising:

a plurality of tooth-like structures disposed on the first surface of the annular disc-shaped structure, wherein the tooth-like structures surround a central axis of the annular disc-shaped structure and are disposed at intervals, a slot is disposed between two adjacent tooth-like structures, a top surface is disposed on the other side of each tooth-like structure, the top surface is a curved surface with a single curvature, the curvature of the top surface is between R30 and R120, and the top surface is disposed in a direction perpendicular to the central axis;