Rotary electric machine and stator thereof

Abstract

The utility model relates to a rotating motor and a stator thereof. The rotating motor comprises the stator, a rotor and a winding group. The stator comprises a yoke portion and a plurality of tooth portions, each tooth portion comprises a tooth body and a first shoe portion, the tooth body is provided with a first end and a second end, the first end is connected with the yoke portion, the second end extends towards the axis of the stator, the first shoe portion is arranged at the second end and extends outwards from one side face of the second end, and the second shoe portion is arranged at the other side face of the second end. The first boot part is provided with a first boot vamp and a first end edge. The first boot vamp at least comprises a first plane and a second plane, one side of the first plane is connected to a joint of the tooth body and the first boot part, and the second plane is an inclined plane formed on the first boot vamp by connecting any point on the first end edge of the first boot part to any point between the first end and the second end of the tooth body. Wherein the slope of the second plane is greater than that of the first plane.

Description

Technical Field

[0001] The utility model relates to the technical field of a motor, in particular to a rotating motor and a stator thereof. Background Art

[0002] Rotating electric machines, such as motors, have been widely used in various equipment, devices or vehicles to drive target objects through the conversion of electrical energy and mechanical energy. In the design process of rotating electric machines, in addition to considering the output torque performance and efficiency of the rotating electric machines, how to reduce the cogging torque is also one of the important considerations.

[0003] Figure 1 This is an enlarged view of a local cross-sectional structure of a known rotating electrical machine. Figure 1 As shown, the rotary electric machine 1 generally includes a rotor 11, a stator 12 and a winding set 13, wherein the stator 12 includes a yoke 121 and a plurality of teeth 122. Each tooth 122 has a tooth body 123 and two boots 124, wherein the tooth body 123 is connected to the yoke 121, and the two boots 124 extend outward from two opposite sides of one end of the tooth body 123. In addition, a slot 14 is formed between any two adjacent teeth 122 among the plurality of teeth 122, and the winding set 13 is wound around the teeth 122 of the stator 12 and accommodated in the slot 14.

[0004] Generally speaking, the angle design between the boot portion 124 of the tooth portion 122 and the tooth body 123 and the contour and size design of the boot portion 124 are highly related to the direction of the magnetic circuit, which will not only affect the output torque performance of the rotating electrical machine 1 but also affect its cogging torque. On the other hand, in order to improve the output torque performance of the rotating electrical machine 1, the more turns the winding 131 of the winding set 13 can be wound, the better, and correspondingly, a relatively large space is reserved in the slot portion 14 so that the winding set 13 can fill the slot portion 14 as much as possible.

[0005] In the known rotating electric machine 1, the shoe surface 124a of the shoe portion 124 is usually a flat surface structure, and the angle between the shoe portion 124 and the tooth body 123 is an obtuse angle close to a right angle. The above-mentioned structural design can reserve a larger space in the groove portion 14 to accommodate a winding 131 with a larger number of turns. However, the last row of the winding group 13 (i.e., a row of windings 131 closest to the shoe surface 124a of the shoe portion 124) is prone to produce too much space between the shoe surface 124a of the shoe portion 124, which will affect the output torque performance of the rotating electric machine 1.

[0006] On the other hand, according to the experimental results, if the cogging torque of the rotating electric machine 1 is to be reduced, the greater the slope of the surface formed by the shoe surface 124a of the aforementioned shoe portion 124, the better the effect, that is, the more inclined the shoe surface 124a of the shoe portion 124 is, the lower the cogging torque of the rotating electric machine 1 will be. However, when the shoe surface 124a of the shoe portion 124 is more inclined, the space of the slot portion 14 will be relatively smaller, so that the number of turns of the winding 131 of the winding group 13 is relatively reduced, which will lead to a decrease in the output torque performance of the rotating electric machine 1. Therefore, it is difficult to achieve a simultaneous improvement in the output torque performance and the cogging torque performance of the shoe portion 124 of the stator 12 of the conventional rotating electric machine 1.

[0007] In view of this, it is necessary to develop an improved rotating electrical machine and a stator thereof to solve the problems faced by the prior art. Utility Model Content

[0008] The utility model aims to provide a rotating electric machine and a stator thereof, wherein the shoe surface of the shoe portion of the tooth portion of the stator is designed with a multi-segment surface, thereby maintaining the output torque performance of the rotating electric machine and reducing its cogging torque.

[0009] To achieve the above-mentioned purpose, the present invention provides a rotating electric machine, which includes a stator, a rotor and at least one winding group. The stator includes a yoke and a plurality of teeth, wherein the plurality of teeth are respectively connected to the yoke and are arranged to be separated from each other along the circumference of the yoke, and define a receiving cavity, wherein a groove and a notch are formed between any two adjacent teeth among the plurality of teeth, and each tooth includes a tooth body and a first shoe, wherein the tooth body has a first end and a second end, the first end is connected to the yoke, and the second end extends toward the axis of the stator, wherein the first shoe is arranged at the second end and extends outward from the side of the second end, and the first shoe has a first shoe surface and a first end edge, wherein the first shoe surface is adjacent to the corresponding groove, and the first end edge is adjacent to the corresponding notch. The rotor is arranged in the receiving cavity of the stator. At least one winding group includes at least one winding, wherein at least one winding is wound on the tooth and accommodated in the groove. The first shoe surface includes at least a first plane and a second plane, one side of the first plane is connected to the connection between the tooth body and the first shoe portion, and the first plane is parallel to the center line of a row of windings of at least one winding group adjacent to the first shoe portion, and the second plane is an inclined plane formed on the first shoe surface by connecting a line with any point on the first end edge of the first shoe portion as the starting point to any point between the first end and the second end of the tooth body, wherein the slope of the second plane is greater than the slope of the first plane.

[0010] According to an embodiment of the present case, the yoke is annular and has an inner periphery, and the first ends of the plurality of teeth are respectively connected to the inner periphery of the yoke.

[0011] According to an embodiment of the present case, each of the tooth portions further includes a second shoe portion, wherein the first shoe portion and the second shoe portion are disposed on two opposite sides of a center line of the tooth portion.

[0012] According to one embodiment of the present case, the second boot portion is disposed at the second end and extends outward from the other side surface of the second end, and the second boot portion has a second boot surface and a second end edge, wherein the second boot surface is adjacent to the corresponding groove portion, and the second end edge is adjacent to the corresponding slot.

[0013] According to an embodiment of the present invention, the second shoe surface is an inclined surface with a single slope.

[0014] According to one embodiment of the present case, the second shoe surface includes at least a third plane and a fourth plane, one side of the third plane is connected to a connection point between the tooth body and the second shoe portion, and the third plane is parallel to the center line of a row of windings of the at least one winding group adjacent to the second shoe portion, and the fourth plane is an inclined plane formed on the second shoe surface by connecting a line with any point on the second end edge of the second shoe portion as a starting point to any point between the first end and the second end of the tooth body, wherein the slope of the fourth plane is greater than the slope of the third plane.

[0015] According to one embodiment of the present case, one side of the second plane is connected to one side of the first end edge, and the other side of the second plane is connected to the other side of the first plane at a first boundary line, wherein one side of the fourth plane is connected to one side of the second end edge, and the other side of the fourth plane is connected to the other side of the third plane at a second boundary line.

[0016] According to an embodiment of the present invention, the contour of the first shoe portion is different from the contour of the second shoe portion, and the first shoe portion is asymmetrically disposed on two opposite sides of the center line of the tooth portion.

[0017] According to an embodiment of the present invention, the contour of the first shoe portion is the same as the contour of the second shoe portion, and they are symmetrically disposed on two opposite sides of the center line of the tooth portion.

[0018] According to one embodiment of the present case, each tooth portion includes a tooth portion outer peripheral surface and at least one recess, wherein the tooth portion outer peripheral surface is defined by a side edge of the first boot portion, a side edge of the second boot portion, and an end surface of the second end of the tooth body, wherein the at least one recess is arranged on the tooth portion outer peripheral surface and is recessed toward the yoke portion.

[0019] To achieve the above-mentioned purpose, the present invention provides a stator, which includes a yoke and a plurality of teeth. The plurality of teeth are respectively connected to the yoke and are arranged to be separated from each other along the circumference of the yoke, wherein a slot and a slot are formed between any two adjacent teeth among the plurality of teeth, and each tooth includes a tooth body and a first shoe, wherein the tooth body has a first end and a second end, the first end is connected to the yoke, and the second end extends toward an axis of the stator, wherein the first shoe is arranged at the second end and extends outward from a side surface of the second end, and the first shoe has a first shoe surface and a first end edge, wherein the first shoe surface is adjacent to the corresponding slot, and the first end edge is adjacent to the corresponding slot. The first shoe surface includes at least a first plane and a second plane, one side of the first plane is connected to the connection between the tooth body and the first shoe portion, and the first plane is parallel to the center line of a row of windings of at least one winding group adjacent to the first shoe portion, and the second plane is an inclined plane formed on the first shoe surface by connecting a line with any point on the first end edge of the first shoe portion as the starting point to any point between the first end and the second end of the tooth body, wherein the slope of the second plane is greater than the slope of the first plane.

[0020] According to an embodiment of the present case, the yoke is annular and has an inner periphery, and the first ends of the plurality of teeth are respectively connected to the inner periphery of the yoke.

[0021] According to an embodiment of the present case, each of the tooth portions further includes a second shoe portion, wherein the first shoe portion and the second shoe portion are disposed on two opposite sides of a center line of the tooth portion.

[0022] According to one embodiment of the present case, the second boot portion is disposed at the second end and extends outward from the other side surface of the second end, and the second boot portion has a second boot surface and a second end edge, wherein the second boot surface is adjacent to the corresponding groove portion, and the second end edge is adjacent to the corresponding slot.

[0023] According to an embodiment of the present invention, the second shoe surface is an inclined surface with a single slope.

[0024] According to one embodiment of the present case, the second shoe surface includes at least a third plane and a fourth plane, one side of the third plane is connected to a connection point between the tooth body and the second shoe portion, and the third plane is parallel to the center line of a row of windings of the at least one winding group adjacent to the second shoe portion, and the fourth plane is an inclined plane formed on the second shoe surface by connecting a line with any point on the second end edge of the second shoe portion as a starting point to any point between the first end and the second end of the tooth body, wherein the slope of the fourth plane is greater than the slope of the third plane.

[0025] According to one embodiment of the present case, one side of the second plane is connected to one side of the first end edge, and the other side of the second plane is connected to the other side of the first plane at a first boundary line, wherein one side of the fourth plane is connected to one side of the second end edge, and the other side of the fourth plane is connected to the other side of the third plane at a second boundary line.

[0026] According to an embodiment of the present invention, the contour of the first shoe portion is different from the contour of the second shoe portion, and the first shoe portion is asymmetrically disposed on two opposite sides of the center line of the tooth portion.

[0027] According to an embodiment of the present invention, the contour of the first shoe portion is the same as the contour of the second shoe portion, and they are symmetrically disposed on two opposite sides of the center line of the tooth portion.

[0028] According to one embodiment of the present case, each tooth portion includes a tooth portion outer peripheral surface and at least one recess, wherein the tooth portion outer peripheral surface is defined by a side edge of the first boot portion, a side edge of the second boot portion, and an end surface of the second end of the tooth body, wherein the at least one recess is arranged on the tooth portion outer peripheral surface and is recessed toward the yoke portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an enlarged view of a local cross-sectional structure of a known rotating electrical machine;

[0030] Figure 2 It is a schematic cross-sectional structure diagram of a rotating electrical machine according to the first embodiment of the present invention;

[0031] Figure 3 for Figure 2 An enlarged view of a partial cross-sectional structure of a rotating electrical machine shown;

[0032] Figure 4 It is an enlarged view of the partial cross-sectional structure of the rotating electrical machine according to the second embodiment of the present case.

[0033]

Explanation of symbols

[0034] 1, 2, 2a: Rotating electrical machines

[0035] 11, 21: Rotor

[0036] 12, 22: Stator

[0037] 121, 24: Yoke

[0038] 122, 25: Tooth

[0039] 124: Boots

[0040] 124a: Upper

[0041] 13, 23: Winding group

[0042] 131, 27: Winding

[0043] 14, 26: Groove

[0044] 251: Tooth body

[0045] 251a: First end

[0046] 251b: Second end

[0047] 252: First Boots

[0048] 252a: First upper

[0049] 252b: First edge

[0050] 253: Second Boot

[0051] 253a: Second upper

[0052] 253b: Second end edge

[0053] 254: Outer surface of tooth

[0054] 255: Concave

[0055] 26a: Notch

[0056] 28: Accommodation cavity

[0057] A: First plane

[0058] B: Second plane

[0059] C: Third plane

[0060] D: The fourth plane

[0061] L1: First boundary line

[0062] L2: Second Junction Line

[0063] X: Centerline DETAILED DESCRIPTION

[0064] Some typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different aspects, which do not deviate from the scope of the present invention, and the description and drawings therein are essentially used for illustration rather than for limiting the present invention. For example, if the following content of the present invention describes that a first feature is set on or above a second feature, it means that it includes an embodiment in which the first feature and the second feature are directly in contact, and also includes an embodiment in which an additional feature can be set between the first feature and the second feature, so that the first feature and the second feature may not be in direct contact. In addition, different embodiments of the present invention may use repeated reference symbols and / or marks. These repeated reference symbols and / or marks are for the purpose of simplification and clarity, and are not used to limit the relationship between the various embodiments and / or the appearance structure. Furthermore, in order to facilitate the description of the relationship between a component or feature component and another (plural) component or (plural) feature component in the accompanying drawings, spatially related terms such as "under...", "below", "lower", "above", "upper" and similar terms may be used. In addition to the orientations shown in the drawings, spatially related terms are used to cover different orientations of the device in use or operation. The device can be set to other directions (for example, rotated 90 degrees or located in other directions), and the spatially related terms used can be interpreted accordingly. When a component is referred to as being "connected" or "coupled" to another component, it can be directly connected to or coupled to another component, or there can be an intervening component. Although the numerical ranges and parameters of the broad scope of this case are approximate values, the numerical values ​​are stated in the specific examples as accurately as possible. In addition, it is understood that although the terms "first", "second", "third" and the like can be used in the scope of the patent application to describe different components, these components should not be limited by these terms, and the components described accordingly in the embodiments are represented by different component symbols. These terms are for different components, for example: the first component can be referred to as the second component. Similarly, the second component can also be referred to as the first component without departing from the scope of the embodiment. The term "and / or" in the specification includes any or all combinations of one or more related listed items. The term "about" refers to an average value within a standard error range generally accepted by those skilled in the art.

[0065] Figure 2 is a schematic cross-sectional structure diagram of a rotating electrical machine according to the first embodiment of the present invention, Figure 3 for Figure 2 The enlarged view of the partial cross-section structure of the rotating electrical machine shown in FIG. Figure 2 and 3As shown, the rotary motor 2 of the present case includes a rotor 21, a stator 22 and at least one winding set 23. The stator 22 includes a yoke 24 and a plurality of teeth 25, wherein the yoke 24 is annular and has an inner periphery. The plurality of teeth 25 are respectively connected to the inner periphery of the yoke 24 and are arranged spaced apart from each other along the circumference of the yoke 24, and define a receiving cavity 28, wherein the rotor 21 is arranged in the receiving cavity 28. A groove 26 is formed between any two adjacent teeth 25 among the plurality of teeth 25. Each tooth 25 includes a tooth body 251 and a first shoe 252. The tooth body 251 has a first end 251a and a second end 251b, wherein the first end 251a of the tooth body 251 is connected to the inner periphery of the yoke 24, and the second end 251b of the tooth body 251 extends toward the axis of the stator 22. The first shoe portion 252 is disposed on the second end 251 b of the tooth body 251 and extends outward from the side of the second end 251 b. Each winding set 23 includes at least one winding 27 , wherein the winding 27 is wound on the tooth portion 25 and received in the groove portion 26 .

[0066] In this embodiment, the first shoe portion 252 of the tooth portion 25 has a first shoe surface 252a and a first end edge 252b, wherein the first shoe surface 252a is adjacent to the corresponding groove portion 26, and the first end edge 252b is adjacent to the corresponding notch 26a. The first shoe surface 252a is a multi-segment surface structure, and at least includes a first plane A and a second plane B. One side of the first plane A is connected to the connection between the tooth body 251 and the first shoe portion 252, and is parallel to the center line of a row of windings 27 of the first shoe portion 252 adjacent to the tooth portion 25. The second plane B is an inclined surface formed on the first shoe surface 252a by connecting a line starting from any point on the first end edge 252b of the first shoe portion 252 to any point between the first end 251a and the second end 251b of the tooth body 251. In this embodiment, one side of the second plane B is connected to one side of the first end edge 252b, and the other side of the second plane B is connected to the other side of the first plane A at a first boundary line L1. In this embodiment, the slope of the second plane B is greater than the slope of the first plane A, and the first plane A and the second plane B are arranged in sequence from the connection between the tooth body 251 and the first shoe portion 252 to the first end edge 252b, thereby forming a shoe surface structure with multiple sections. In some embodiments, the first shoe surface 252a of the first shoe portion 252 can also be a shoe surface structure with more than two sections, such as a three-section structure, a four-section structure, etc. By designing the first shoe surface 252a of the first shoe portion 252 as a multi-segment surface structure, the winding space of the slot portion 26 can be effectively utilized, so that the magnetic saturation position of the stator 22 is changed, the occurrence of magnetic saturation in the shoe portion is reduced, and the cogging torque of the rotating motor 2 is reduced without reducing the number of winding turns of the winding group 23. A smaller shoe tip design can be maintained to reduce magnetic leakage between two teeth, so as to maintain the output torque performance of the rotating motor 2.

[0067] Please continue reading Figure 3In this embodiment, each tooth portion 25 further includes a second shoe portion 253, wherein the second shoe portion 253 is disposed at the second end 251b of the tooth body 251 and extends outward from the other side of the second end 251b, wherein the first shoe portion 252 and the second shoe portion 253 are disposed on two opposite sides of the center line X of the tooth portion 25. The second shoe portion 253 of the tooth portion 25 has a second shoe surface 253a and a second end edge 253b, wherein the second shoe surface 253a is adjacent to the corresponding groove portion 26, and the second end edge 253b is adjacent to the corresponding notch 26a. The second shoe surface 253a is an inclined surface with a single slope, wherein one side of the inclined surface is connected to the connection between the tooth body and the second shoe portion 253, and is parallel to the center line of a row of windings 27 of the second shoe portion 253 adjacent to the tooth portion 25. The other side of the inclined surface is connected to one side of the second end edge 253b. In this embodiment, the first shoe portion 252 and the second shoe portion 253 have different profiles and are non-correspondingly disposed on two opposite sides of the center line X of the tooth portion 25 .

[0068] In this embodiment, the yoke 24 and the plurality of teeth 25 of the stator are integrally formed and made of magnetic material. In some embodiments, the rotary motor 2 includes a plurality of winding sets 23, for example, three winding sets 23, but not limited thereto. In some embodiments, the angle between the tooth body 251 and the first shoe 252 is a stagnation angle, and preferably between 120 degrees and 150 degrees, but not limited thereto. The angle between the tooth body 251 and the second shoe 253 is a stagnation angle, and preferably between 120 degrees and 150 degrees, but not limited thereto.

[0069] Figure 4 FIG. 2 is an enlarged view of a partial cross-sectional structure of a rotating electrical machine according to the second embodiment of the present invention. Figure 4As shown, the structure and function of the rotary motor 2a of this embodiment are similar to those of the rotary motor 2 of the first embodiment, and the same element symbols represent the same structural elements and functions, which will not be repeated here. Different from the rotary motor 2 of the first embodiment, the second shoe 253 of the rotary motor 2a of this embodiment can also be designed as a multi-segment surface structure. In this embodiment, the second shoe 253 is arranged at the second end 251b of the tooth body 251 and extends outward from the other side of the second end 251b, wherein the first shoe 252 and the second shoe 253 are arranged on two opposite sides of the center line X of the tooth portion 25. The second shoe 253 of the tooth portion 25 has a second shoe surface 253a and a second end edge 253b, wherein the second shoe surface 253a is adjacent to the corresponding groove portion 26, and the second end edge 253b is adjacent to the corresponding notch 26a. The second shoe surface 253a is a multi-segment surface structure and includes a third plane C and a fourth plane D. One side of the third plane C is connected to the connection between the tooth body 251 and the second shoe portion 253, and is parallel to the center line of a row of windings 27 of the second shoe portion 253 adjacent to the tooth portion 25. The fourth plane D is an inclined plane formed on the second shoe portion 253 by connecting a line starting from any point on the second end edge 253b of the second shoe portion 253 to any point between the first end 251a and the second end 251b of the tooth body 251. In this embodiment, one side of the fourth plane D is connected to one side of the second end edge 253b, and the other side of the fourth plane D is connected to the other side of the third plane C at a second boundary line L2. In this embodiment, the slope of the fourth plane D is greater than the slope of the third plane C, and the third plane C and the fourth plane D are arranged in sequence from the connection between the tooth body 251 and the second shoe portion 253 to the second end edge 253b, thereby forming a shoe surface structure with multiple sections. In some embodiments, the second shoe surface 253a of the second shoe portion 253 may also be a shoe surface structure with more than two sections, such as a three-section structure, a four-section structure, etc. In this embodiment, the contours of the first shoe portion 252 and the second shoe portion 253 are the same and are symmetrically arranged on two opposite sides of the center line X of the tooth portion 25. By designing the first shoe surface 252a of the first shoe portion 252 and the second shoe surface 253a of the second shoe portion 253 as multi-section surface structures, the winding space of the slot portion 26 can be effectively utilized, so that the magnetic saturation position of the stator 22 is changed, the occurrence of the magnetic saturation phenomenon of the shoe portion is reduced, and the cogging torque of the rotating motor 2a is reduced, and the number of winding turns of the winding group 23 does not need to be reduced, and the smaller shoe tip design can be maintained to reduce the magnetic leakage between the two teeth, so as to maintain the output torque performance of the rotating motor 2a.

[0070] In some variations, the first shoe surface 252a of the first shoe portion 252 and the second shoe surface 253a of the second shoe portion 253 are respectively multi-segment structures, but the profile of the first shoe portion 252 is different from the profile of the second shoe portion 253, and the first shoe portion 252 and the second shoe portion 253 are asymmetrically disposed on two opposite sides of the center line X of the tooth portion 25. For example, the slope of the fourth plane D on the second shoe surface 253a of the second shoe portion 253 is different from the slope of the second plane B on the first shoe surface 252a of the first shoe portion 252, or the position of the second boundary line L2 on the second shoe surface 253a of the second shoe portion 253 and the position of the first boundary line L1 on the first shoe surface 252a of the first shoe portion 252 are different relative to the center line X of the tooth portion 25, but the present invention is not limited thereto.

[0071] In some embodiments, such as Figure 3 As shown, each tooth portion 25 further includes a tooth portion outer peripheral surface 254 and at least one recess 255, wherein the tooth portion outer peripheral surface 254 is defined by one side of the first shoe portion 252, one side of the second shoe portion 253 and one end surface of the second end 251b of the tooth body 251 and is adjacent to the accommodating cavity 28. At least one recess 255 is disposed on the tooth portion outer peripheral surface 254 and is recessed from the tooth portion outer peripheral surface 254 toward the yoke portion 24. By disposing at least one recess 255, the cogging torque of the rotating motor 2, 2a can be further reduced. In one embodiment, at least one recess 255 includes two, but the number is not limited thereto. The cross section of each recess 255 is rectangular, and the two recesses 255 are symmetrically disposed on two opposite sides of the center line X of the tooth portion 25. It should be emphasized that the profile, number and setting position of the recess 255 are not limited to the above-mentioned embodiment, and can be changed according to actual application requirements.

[0072] In summary, the present invention provides a rotating motor and a stator thereof. By designing the shoe surface of the stator shoe as a multi-segment surface structure, the winding space of the slot portion can be effectively utilized, so that the magnetic saturation position of the stator changes, the occurrence of magnetic saturation phenomenon of the shoe portion is reduced, and the cogging torque of the rotating motor is reduced without reducing the number of winding turns of the winding group. A smaller shoe tip design can be maintained to reduce the magnetic leakage between the two teeth, so as to maintain the output torque performance of the rotating motor.

[0073] The present invention may be modified in various ways by those skilled in the art, but all modifications are within the scope of protection of the attached claims.

Claims

1. A rotating electrical machine, characterized in that: include: A stator, comprising a yoke and a plurality of teeth, wherein the plurality of teeth are respectively connected to the yoke and are arranged to be spaced apart from each other along the circumference of the yoke, and define a receiving cavity, wherein a slot and a slot opening are formed between any two adjacent teeth of the plurality of teeth, and each of the teeth comprises a tooth body and a first shoe, wherein the tooth body has a first end and a second end, the first end is connected to the yoke, and the second end extends toward an axis of the stator, wherein the first shoe is arranged at the second end and extends outwardly from a side surface of the second end, and the first shoe has a first shoe surface and a first end edge, wherein the first shoe surface is adjacent to the corresponding slot, and the first end edge is adjacent to the corresponding slot opening; A rotor, disposed in the accommodating cavity of the stator; At least one winding assembly, comprising at least one winding, wherein the at least one winding is wound on the tooth portion and accommodated in the groove portion; The first shoe surface includes at least a first plane and a second plane, one side of the first plane is connected to a connection between the tooth body and the first shoe portion, and the first plane is parallel to the center line of a row of windings of at least one winding group adjacent to the first shoe portion, and the second plane is an inclined plane formed on the first shoe surface by connecting a line with any point on the first end edge of the first shoe portion as a starting point to any point between the first end and the second end of the tooth body, wherein the slope of the second plane is greater than the slope of the first plane.

2. The rotating electrical machine according to claim 1, characterized in that: The yoke is annular and has an inner periphery, and the first ends of the plurality of teeth are respectively connected to the inner periphery of the yoke.

3. The rotating electrical machine according to claim 1, characterized in that: Each of the tooth portions further includes a second shoe portion, wherein the first shoe portion and the second shoe portion are disposed on two opposite sides of a center line of the tooth portion.

4. The rotating electrical machine according to claim 3, characterized in that: The second boot portion is disposed at the second end and extends outward from the other side surface of the second end. The second boot portion has a second boot surface and a second end edge, wherein the second boot surface is adjacent to the corresponding groove portion, and the second end edge is adjacent to the corresponding notch.

5. The rotating electrical machine according to claim 4, characterized in that: The second shoe surface is an inclined surface with a single slope.

6. The rotating electrical machine according to claim 4, characterized in that The second shoe surface includes at least a third plane and a fourth plane, one side of the third plane is connected to a connection between the tooth body and the second shoe portion, and the third plane is parallel to the center line of a row of windings of the at least one winding group adjacent to the second shoe portion, and the fourth plane is an inclined plane formed on the second shoe surface by connecting a line with any point on the second end edge of the second shoe portion as a starting point to any point between the first end and the second end of the tooth body, wherein the slope of the fourth plane is greater than the slope of the third plane.

7. The rotating electrical machine according to claim 6, characterized in that One side of the second plane is connected to one side of the first end edge, and the other side of the second plane is connected to the other side of the first plane at a first boundary line, wherein one side of the fourth plane is connected to one side of the second end edge, and the other side of the fourth plane is connected to the other side of the third plane at a second boundary line.

8. The rotating electrical machine according to claim 6, characterized in that The first shoe portion has a different profile from the second shoe portion and is asymmetrically disposed on two opposite sides of the center line of the tooth portion.

9. The rotating electrical machine according to claim 6, characterized in that: The first shoe portion has the same profile as the second shoe portion and is symmetrically disposed on two opposite sides of the center line of the tooth portion.

10. The rotating electrical machine according to claim 3, characterized in that Each tooth portion includes a tooth portion outer peripheral surface and at least one recess, wherein the tooth portion outer peripheral surface is defined by a side edge of the first boot portion, a side edge of the second boot portion and an end surface of the second end of the tooth body, wherein the at least one recess is arranged on the tooth portion outer peripheral surface and is recessed toward the yoke portion.

11. A stator, characterized in that: Include: a yoke; as well as A plurality of teeth, respectively connected to the yoke, and arranged in a spaced relationship from each other along the circumference of the yoke, wherein a slot and a slot opening are formed between any two adjacent teeth among the plurality of teeth, and each of the teeth comprises a tooth body and a first shoe, wherein the tooth body has a first end and a second end, the first end is connected to the yoke, and the second end extends toward an axis of the stator, wherein the first shoe is arranged at the second end and extends outwardly from a side surface of the second end, and the first shoe has a first shoe surface and a first end edge, wherein the first shoe surface is adjacent to the corresponding slot, and the first end edge is adjacent to the corresponding slot opening; The first shoe surface includes at least a first plane and a second plane, one side of the first plane is connected to a connection point between the tooth body and the first shoe portion, and the first plane is parallel to the center line of a row of windings of at least one winding group adjacent to the first shoe portion, and the second plane is an inclined plane formed on the first shoe surface by connecting a line with any point on the first end edge of the first shoe portion as a starting point to any point between the first end and the second end of the tooth body, wherein the slope of the second plane is greater than the slope of the first plane.

12. The stator according to claim 11, characterized in that The yoke is annular and has an inner periphery, and the first ends of the plurality of teeth are respectively connected to the inner periphery of the yoke.

13. The stator according to claim 11, characterized in that Each of the tooth portions further includes a second shoe portion, wherein the first shoe portion and the second shoe portion are disposed on two opposite sides of a center line of the tooth portion.

14. The stator according to claim 13, characterized in that The second boot portion is disposed at the second end and extends outward from the other side surface of the second end. The second boot portion has a second boot surface and a second end edge, wherein the second boot surface is adjacent to the corresponding groove portion, and the second end edge is adjacent to the corresponding notch.

15. The stator according to claim 14, characterized in that The second shoe surface is an inclined surface with a single slope.

16. The stator according to claim 14, characterized in that The second shoe surface includes at least a third plane and a fourth plane, one side of the third plane is connected to a connection between the tooth body and the second shoe portion, and the third plane is parallel to the center line of a row of windings of the at least one winding group adjacent to the second shoe portion, and the fourth plane is an inclined plane formed on the second shoe surface by connecting a line with any point on the second end edge of the second shoe portion as a starting point to any point between the first end and the second end of the tooth body, wherein the slope of the fourth plane is greater than the slope of the third plane.

17. The stator according to claim 16, characterized in that One side of the second plane is connected to one side of the first end edge, and the other side of the second plane is connected to the other side of the first plane at a first boundary line, wherein one side of the fourth plane is connected to one side of the second end edge, and the other side of the fourth plane is connected to the other side of the third plane at a second boundary line.

18. The stator according to claim 16, characterized in that The first shoe portion has a different profile from the second shoe portion and is asymmetrically disposed on two opposite sides of the center line of the tooth portion.

19. The stator according to claim 16, characterized in that The first shoe portion has the same profile as the second shoe portion and is symmetrically disposed on two opposite sides of the center line of the tooth portion.

20. The stator according to claim 13, characterized in that Each tooth portion includes a tooth portion outer peripheral surface and at least one recess, wherein the tooth portion outer peripheral surface is defined by a side edge of the first boot portion, a side edge of the second boot portion and an end surface of the second end of the tooth body, wherein the at least one recess is arranged on the tooth portion outer peripheral surface and is recessed toward the yoke portion.

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