Stator punching sheet assembly, stator core and motor

Abstract

The utility model discloses a stator punching sheet assembly, a stator core and a motor. The stator punching sheet assembly comprises a punching sheet body, a limiting part and a slot wedge. Wherein the punching sheet body is annularly arranged, the punching sheet body comprises a stator yoke part and a plurality of stator tooth parts which are connected with each other, the stator tooth parts are arranged at the inner side end of the stator yoke part at intervals in the circumferential direction of the punching sheet body, and a stator groove is formed between every two adjacent stator tooth parts; the plurality of limiting parts are arranged on the side wall surface of the stator slot at intervals along the radial direction of the punching sheet body; and the slot wedge is selectively mounted at one of the plurality of limiting components. The problem of high alternating current loss of the motor in the prior art can be solved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a stator punching sheet assembly, a stator core and a motor. Background Art

[0002] High-speed motors have the advantages of small size, high speed, and high power density. They are widely used in high-speed centrifugal compressors, energy storage flywheels and other fields.

[0003] The motor stator is an important part of the motor. However, the existing motor stator punching slot is relatively simple. When the motor runs at high speed, due to the influence of high-frequency power supply, the motor will produce large AC loss. At the same time, the ventilation structure, which is the most critical for high-speed motors, is not very reasonable. Utility Model Content

[0004] The main purpose of the present application is to provide a stator punching assembly, a stator core and a motor to solve the problem of high AC loss of the motor in the prior art.

[0005] According to one aspect of the present application, a stator punching assembly is provided, comprising:

[0006] A punching sheet body, the punching sheet body is arranged in an annular shape, the punching sheet body comprises a stator yoke portion and a plurality of stator teeth portions connected to each other, the plurality of stator teeth portions are arranged at intervals along the circumferential direction of the punching sheet body at the inner side end of the stator yoke portion, and a stator slot is provided between every two adjacent stator teeth portions;

[0007] A limiting component, wherein the limiting component comprises a plurality of limiting components, and the plurality of limiting components are arranged at intervals on the side wall surface of the stator slot along the radial direction of the punching sheet body;

[0008] A slot wedge is selectively installed at one of the plurality of stop components.

[0009] Furthermore, each of the limiting components includes two limiting sections, and the two limiting sections are arranged opposite to the side wall surface of the stator slot.

[0010] Furthermore, the limiting section includes a limiting protrusion or a limiting groove.

[0011] Furthermore, both ends of the slot wedge are arranged at the limiting section to separate the stator slot into a first slot section and a second slot section, the first slot section is at least used for installing the stator winding, and the second slot section is at least used for ventilation and heat dissipation.

[0012] Furthermore, the two limiting components are provided at intervals along the radial direction of the punch body, one of the two limiting components includes a limiting protrusion, and the other of the two limiting components includes a limiting groove.

[0013] Further, the limiting component close to the center of the punch body includes the limiting protrusion, and the limiting component away from the center of the punch body includes the limiting groove.

[0014] Further, the stator teeth and the stator yoke are integrally formed, and / or,

[0015] The punch body is also provided with ventilation holes, and the ventilation holes include a plurality of ventilation holes, and the plurality of ventilation holes are arranged at intervals along the circumference of the punch body; and / or,

[0016] The punch body is also provided with a connecting portion, which includes a plurality of connecting portions, and the plurality of connecting portions are arranged at intervals along the outer circumferential direction of the punch body.

[0017] Furthermore, the connecting portion includes a dovetail groove.

[0018] On the other hand, the present application further provides a stator core, which is formed by axially stacking a plurality of the above-mentioned stator punching sheet assemblies, and the slot wedges are arranged in the limiting components of the plurality of the stator punching sheet assemblies.

[0019] On the other hand, the present application also provides a motor, which includes the above-mentioned stator core.

[0020] In the present application, relative to the structure of the stator punching sheet in the prior art, the present application enables the punching sheet body to have different voltage levels by arranging a plurality of limiting components on the side wall surface of the stator slot at radial intervals along the punching sheet body, thereby improving the versatility of the punching sheet body in the present application and reducing the material cost of the motor. At the same time, when the distance between a limiting component among the plurality of limiting components and the center of the punching sheet body gradually increases, the arrangement of the stator winding in the stator slot can be reasonably arranged, thereby reducing the AC loss of the motor and effectively improving the efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a structural schematic diagram of the punch body disclosed in the embodiment of the present application;

[0023] Figure 2 The attached embodiment disclosed in this application Figure 1 A magnified schematic diagram of the middle A area;

[0024] Figure 3It is a partial schematic diagram of a first embodiment of a stator punching assembly disclosed in the embodiments of the present application;

[0025] Figure 4 It is a partial schematic diagram of the second embodiment of the stator punching assembly disclosed in the embodiments of the present application.

[0026] The above drawings include the following reference numerals:

[0027] 10. Punching sheet body; 11. Stator yoke; 12. Stator tooth; 13. Stator slot; 131. First slot section; 132. Second slot section; 20. Limiting component; 21. Limiting section; 211. Limiting protrusion; 212. Limiting groove; 213. Limiting protrusion part; 214. Limiting groove part; 30. Slot wedge; 40. Ventilation hole; 50. Connecting part; 51. Dovetail groove. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0031] As described in the background technology, the slot type of the stator punching sheet of the motor in the prior art is relatively simple. During the high-speed operation of the motor, due to the influence of the high-frequency power supply, the motor will produce large AC loss. At the same time, the ventilation structure, which is the most critical for high-speed motors, is not very reasonable. For this reason, the inventor of the present application has designed a new stator punching sheet assembly, which can solve the problem of high AC loss of the motor in the prior art. The stator punching sheet assembly of the present application will be described in detail below in conjunction with the accompanying drawings.

[0032] See also Figures 1 to 4 As shown, the present application provides a stator punching sheet assembly, which includes a punching sheet body 10 , a limiting component 20 and a slot wedge 30 .

[0033] Among them, the punching sheet body 10 is arranged in an annular shape, and the punching sheet body 10 includes a stator yoke 11 and a plurality of stator teeth 12 which are connected to each other. The plurality of stator teeth 12 are arranged at the inner end of the stator yoke 11 at intervals along the circumference of the punching sheet body 10, and a stator slot 13 is provided between each two adjacent stator teeth 12; the limiting components 20 include a plurality of limiting components 20, and the plurality of limiting components 20 are arranged at intervals along the radial direction of the punching sheet body 10 on the side wall surface of the stator slot 13; the slot wedge 30 can be selectively installed at one of the plurality of limiting components 20.

[0034] In this embodiment, the stator slot 13 is at least used to provide an installation space for the stator winding, the limiting component 20 is at least used to provide an installation position for the slot wedge 30, and the slot wedge 30 is at least used to limit and fix the stator winding located in the stator slot 13. When the stator punching assembly is actually processed, a plurality of limiting components 20 can be arranged on the side wall surface of the stator slot 13, wherein the plurality of limiting components 20 are arranged at intervals along the radial direction of the punching body 10 to form a plurality of voltage notches, and the voltage notches can be set to different voltage levels according to actual working requirements, and then the slot wedge 30 is installed on one of the plurality of limiting components 20 to limit and fix the stator winding in the stator slot 13. At the same time, since the multiple limiting components 20 in this embodiment are arranged at radial intervals along the punching sheet body 10 on the side wall surface of the stator slot 13 (that is, a limiting component 20 is provided on each stator tooth portion 12) to form different voltage notches, when the distance between the limiting component 20 and the center of the punching sheet body 10 gradually increases, the arrangement of the stator winding in the stator slot 13 can be reasonably arranged, thereby reducing the AC loss of the motor.

[0035] That is to say, compared with the structure of the stator punching sheet in the prior art, the present application can make the punching sheet body 10 have different voltage levels by arranging multiple limiting components 20 on the side wall surface of the stator slot 13 along the radial interval of the punching sheet body 10, thereby improving the versatility of the punching sheet body 10 in this embodiment and reducing the material cost of the motor. At the same time, when the distance between one of the multiple limiting components 20 and the center of the punching sheet body 10 gradually increases, the arrangement of the stator winding in the stator slot 13 can be reasonably arranged, thereby reducing the AC loss of the motor and effectively improving the motor efficiency.

[0036] Optionally, the limiting components 20 in this embodiment may include two, three, four or more than four, which is not specifically limited in this application. The number of the limiting components 20 can be set by those skilled in the art according to the actual needs of the motor. Figure 2 The case where there are two limiting components 20 is shown.

[0037] Optionally, the stator teeth 12 in this embodiment may include two, three, four or more than four, which is not specifically limited in the present application. The number of the stator teeth 12 can be set by those skilled in the art according to actual needs of the motor.

[0038] Optionally, the cross-section of the stator tooth 12 in this embodiment (i.e., the cross-section obtained by cutting along a direction parallel to the length of the stator tooth 12) can be a rectangle or an inverted T-shape or other shapes. This application does not make any specific limitations here and the specific shape can be determined based on actual conditions.

[0039] Further, see Figures 2 to 4 As shown, each limiting component 20 in this embodiment includes two limiting segments 21, and the two limiting segments 21 are relatively arranged on the side wall surface of the stator slot 13. Specifically, the setting of the limiting segments 21 facilitates the assembly of the slot wedge 30, thereby limiting the movement of the stator winding in the stator slot 13, and to a certain extent, avoiding the stator winding from easily generating vibration and friction when the motor runs at high speed, thereby reducing the AC loss of the motor.

[0040] Optionally, "two limiting segments 21 are relatively arranged on the side wall surface of the stator slot 13" in the present application means that the heights of the two limiting segments 21 relatively located in the same stator slot 13 are the same or different. Preferably, in this embodiment, the heights of the two limiting segments 21 relatively located in the same stator slot 13 are the same, which effectively improves the consistency and reliability of assembly.

[0041] Further, see Figures 2 to 4As shown, the limiting section 21 in this embodiment includes a limiting protrusion 211 or a limiting groove 212. Specifically, the setting of the limiting protrusion 211 or the limiting groove 212 can provide an installation space for the slot wedge 30. Figure 4 As shown, when the limiting segment 21 is set as the limiting protrusion 211, the two ends of the slot wedge 30 can be placed on the two relatively set limiting segments 21 one by one, so that the stator winding in the stator slot 13 can be limited and fixed; see Figure 3 As shown, when the limiting section 21 is configured as a limiting groove 212 , the two ends of the slot wedge 30 can be correspondingly engaged in the two limiting grooves 212 , thereby limiting and fixing the stator winding in the stator slot 13 .

[0042] It can be understood that the shape of the limiting groove 212 in this embodiment can match the shape of the slot wedge 30; or an interference fit can be performed, in which case the size of the limiting groove 212 is slightly smaller than the outer size of the slot wedge 30; or a fixing structure can be added so that the limiting groove 212 and the slot wedge 30 can cooperate with each other to fix the slot wedge 30.

[0043] It can be understood that the cross-section of the limiting protrusion 211 in this embodiment (i.e., the cross-section obtained by cutting along a direction perpendicular to the length of the limiting protrusion 211) can be a rectangular or trapezoidal shape, etc. This application does not make any specific limitations on this, and the specific shape can be determined based on actual conditions.

[0044] Further, see Figure 3 to Figure 4 As shown, both ends of the slot wedge 30 in this embodiment are arranged at the limiting section 21 to separate the stator slot 13 into a first slot section 131 and a second slot section 132. The first slot section 131 is at least used to install the stator winding, and the second slot section 132 is at least used for ventilation and heat dissipation. Specifically, when the stator punching sheet assembly is actually used, the limiting component 20 can be installed on one of the multiple limiting components 20, so that the stator slot 13 can be separated into the first slot section 131 and the second slot section 132, and then the stator winding is arranged in the first slot section 131, while the second slot section 132 is not filled, so as to serve as a ventilation slot for ventilation and heat dissipation. It can be understood that, in combination with Figure 3 to Figure 4 It can be known that, along the radial direction of the lamination body 10, when the length of the first slot segment 131 gradually decreases, the arrangement of the stator winding in the stator slot 13 can be reasonably arranged, thereby reducing the AC loss of the motor and effectively improving the motor efficiency; at the same time, along the radial direction of the lamination body 10, the length of the second slot segment 132 gradually increases, thereby increasing the heat dissipation area of ​​the stator lamination assembly, effectively reducing the temperature of the motor during high-speed operation, and improving the performance and life of the motor to a certain extent.

[0045] Specifically, see Figure 2As shown, the limiting components 20 in this embodiment include two, and the two limiting components 20 are arranged at intervals along the radial direction of the sheet body 10, one of the two limiting components 20 includes a limiting protrusion 213, and the other of the two limiting components 20 includes a limiting groove 214. That is to say, the limiting component 20 arranged close to the sheet body 10 in this embodiment can be set as a limiting protrusion 213 or a limiting groove 214, and the limiting component 20 arranged away from the sheet body 10 can be set as a limiting groove 214 or a limiting protrusion 213. Such an arrangement facilitates the slot wedge 30 to be selectively installed in the limiting component 20. It can be understood that in this embodiment, the arrangement of the two limiting components 20 can form two voltage notches, and when the stator sheet assembly is actually used, it can be applied to different voltage levels, effectively improving the versatility of the sheet body 10 in this embodiment. Among them, the limiting component 20 disposed near the punch body 10 can be set as a notch of 380V voltage, and the limiting component 20 disposed away from the punch body 10 can be set as a notch of 690V. Of course, in other embodiments of the present application, the two limiting components 20 can also be set as notches of other different voltage levels, as long as they are other deformation methods under the conception of the present application, they are all within the protection scope of the present application.

[0046] Specifically, see Figure 3 to Figure 4 As shown, the limiting component 20 near the center of the sheet body 10 in this embodiment includes a limiting protrusion 213, and the limiting component 20 away from the center of the sheet body 10 includes a limiting groove 214. Specifically, in this embodiment, the limiting groove 214 is arranged away from the center of the sheet body 10 to facilitate the installation and arrangement of the stator winding, while in this embodiment, the limiting protrusion 213 is arranged near the center of the sheet body 10 to facilitate the fixing of the slot wedge 30.

[0047] Furthermore, in order to improve the structural strength and service life of the stator punching sheet assembly in this embodiment, the stator teeth 12 and the stator yoke 11 in this embodiment are integrally formed, so that the structure is stable and reliable.

[0048] Further, see Figure 1 As shown, the punch body 10 in this embodiment is also provided with ventilation holes 40, and the ventilation holes 40 include a plurality of ventilation holes 40, which are arranged at intervals along the circumference of the punch body 10. In this way, during the high-speed operation of the motor, the arrangement of the ventilation holes 40 can dissipate the heat generated by the stator core to the outside, prevent the motor from overheating, and extend the service life of the motor to a certain extent.

[0049] Optionally, the "ventilation holes 40" in the present application may include two, three, four or more than four, which is not specifically limited in the present application, and the number of the ventilation holes 40 can be set by those skilled in the art according to actual needs. The drawings in this embodiment show the situation when the ventilation holes 40 are twenty-four.

[0050] Further, see Figure 1 As shown, the punch body 10 in this embodiment is further provided with a connecting portion 50, and the connecting portion 50 includes a plurality of connecting portions 50, which are arranged at intervals along the outer circumferential direction of the punch body 10. Specifically, the arrangement of the connecting portion 50 facilitates fixing the plurality of punch bodies 10 together, effectively improving the stability and structural strength of the overall structure of the stator punch assembly.

[0051] Optionally, the “connection part 50” in the present application may include two, three, four or more than four, which is not specifically limited in the present application. The number of the connection part 50 may be set by those skilled in the art according to actual needs. Figure 1 The case where the number of connecting parts 50 is thirteen is shown.

[0052] Further, see Figure 1 As shown, the connection portion 50 in this embodiment includes a dovetail groove 51. Such a configuration facilitates the fixed connection of multiple punching sheet bodies 10 together to form a stator core, effectively ensuring that the stator core has good stability during use. Of course, in other embodiments of the present application, the connection portion 50 also includes structures such as connection holes and connection grooves. As long as it is other deformation methods under the conception of the present application, they are all within the protection scope of the present application.

[0053] In combination with the above-mentioned embodiments, it can be known that: since the multiple limiting components in the present application are arranged at intervals along the radial direction of the punching sheet body on the side wall surface of the stator slot, different voltage slots can be formed to adapt to different voltage levels, which effectively improves the versatility of the stator punching sheet assembly in the present application and reduces the material cost of the motor. At the same time, by adjusting the distance between the limiting component and the center of the punching sheet body, the present application can reasonably arrange the stator winding in the stator slot, thereby reducing the AC loss of the motor and effectively improving the efficiency of the motor.

[0054] On the other hand, the embodiment of the present application further provides a stator core, which is formed by axially stacking a plurality of the above-mentioned stator sheet assemblies, and the slot wedges are arranged in the limiting components of the plurality of stator sheet assemblies, so the stator core includes all the technical effects of the above-mentioned stator sheet assemblies. Since the technical effects of the stator sheet assemblies have been described in detail above, they will not be repeated here.

[0055] On the other hand, the embodiment of the present application further provides a motor, which includes the above-mentioned stator core, and thus the motor includes all the technical effects of the above-mentioned stator core. Since the technical effects of the stator core have been described in detail above, they will not be repeated here.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0058] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stator punching assembly, characterized in that: include: A punching sheet body (10), the punching sheet body (10) is arranged in an annular shape, the punching sheet body (10) comprises a stator yoke (11) and a plurality of stator teeth (12) connected to each other, the plurality of stator teeth (12) are arranged at intervals along the circumference of the punching sheet body (10) at the inner side end of the stator yoke (11), and a stator slot (13) is provided between every two adjacent stator teeth (12); A limiting component (20), the limiting component (20) comprising a plurality of limiting components (20), the plurality of limiting components (20) being arranged at intervals along the radial direction of the punching sheet body (10) on the side wall surface of the stator slot (13); A slot wedge (30), wherein the slot wedge (30) can be selectively installed at one of the plurality of stop components (20); The limiting components (20) include two, and the two limiting components (20) are arranged at intervals along the radial direction of the punch body (10), one of the two limiting components (20) includes a limiting protrusion (213), and the other of the two limiting components (20) includes a limiting groove (214).

2. The stator sheet assembly according to claim 1, characterized in that: The limiting protrusion (213) is arranged close to the center of the punch body (10), and the limiting groove (214) is arranged away from the center of the punch body (10).

3. The stator sheet assembly according to claim 1, characterized in that: The stator tooth portion (12) and the stator yoke portion (11) are integrally formed, and / or, The punch body (10) is further provided with ventilation holes (40), the ventilation holes (40) include a plurality of ventilation holes (40), and the plurality of ventilation holes (40) are arranged at intervals along the circumference of the punch body (10); and / or, The punch body (10) is also provided with a connecting portion (50), and the connecting portion (50) comprises a plurality of connecting portions (50), and the plurality of connecting portions (50) are arranged at intervals along the outer circumferential direction of the punch body (10).

4. The stator sheet assembly according to claim 3, characterized in that: The connecting portion (50) comprises a dovetail groove (51).

5. A stator core, characterized in that: The stator core is formed by axially stacking a plurality of stator sheet assemblies according to any one of claims 1 to 4, and the slot wedge (30) is arranged in the limiting components (20) of the plurality of stator sheet assemblies.

6. A motor, characterized in that: The motor comprises the stator core according to claim 5.

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