Motor stator

Abstract

The motor stator comprises a stator iron core, and the stator iron core comprises an iron core body and an iron core ring arranged on the periphery of the iron core body in a sleeving mode. The iron core main body is in a circular ring shape, the iron core main body is provided with a plurality of tooth parts, the plurality of tooth parts are arranged on the inner side of the iron core main body in an array mode, and a stator groove is defined between every two adjacent tooth parts; each of the plurality of tooth parts is provided with a pole shoe; and a winding, wherein the winding is arranged in the stator slot. According to the stator core, the winding can be firmly limited in the stator slot, so that the slot fullness rate of the stator is improved; and the stator is simple to form, and the assembly efficiency is improved.

Description

Technical Field

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

[0002] The existing flat wire stator is formed by stacking multiple annular stator punching sheets, and the winding is pushed into the stator slots radially. Therefore, the opening of the stator slot in this design is relatively large. After the winding is pushed into the stator slot, slot cover paper needs to be installed at the opening of the stator slot. The slot cover paper is used to cover the winding and protect the winding from external damage. The stator of this structure not only has slot cover paper, but also requires the process of inserting the slot cover paper, which increases the cost of materials and labor hours. In addition, the larger the opening of the stator slot, the lower the slot fill rate and magnetic field distribution of the stator, which in turn affects the performance of the motor. Utility Model Content

[0003] In order to solve the above problems in the existing technical problems, the purpose of the present invention is to provide a motor stator, and the specific technical solutions adopted are as follows:

[0004] A motor stator includes a stator core, the stator core including a core body and a core ring sleeved around the core body; the core body is annular and provided with a plurality of teeth arranged in an array on the inner side of the core body, with stator slots defined between each adjacent pair of teeth; each of the plurality of teeth is provided with a pole shoe; the distance between each adjacent pair of pole shoes is less than the distance between two adjacent teeth; and a winding disposed within the stator slot. The stator core of the present application can securely confine the winding within the stator slots, thereby improving the stator's slot fill rate; and the stator is simple to form, thereby improving assembly efficiency.

[0005] Optionally, the cross section of each of the plurality of teeth is trapezoidal, so as to facilitate installation of the winding into the stator slot.

[0006] Optionally, the core body has a left end face and a right end face, and the left end face and the right end face are connected by welding, so as to fix the core body.

[0007] Optionally, the core body further has an outer end surface, and a plurality of grooves are provided on the outer end surface.

[0008] Optionally, the plurality of grooves include a left groove close to the left end surface and a right groove close to the right end surface. When the flat core is bent, the left groove and the right groove can be used to fix and limit the core.

[0009] Optionally, the core ring and the core body are arranged along the same axial direction and sleeved on the outer periphery of the core body; the core ring and the core body are interference fit to meet the requirements of magnetic flux and thus meet the performance of the stator.

[0010] Optionally, insulating paper is provided between the core body and the windings, and is used to insulate the stator core from the windings, thereby preventing current leakage and ensuring the safety of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Other features and advantages of the present invention are described in the following description, which explains the present invention in more detail based on embodiments in conjunction with the accompanying drawings.

[0012] Figure 1 It is a structural schematic diagram of the flat iron core and the iron core body of the utility model;

[0013] Figure 2 It is a structural diagram of the flat iron core and winding of the utility model;

[0014] Figure 3 This utility model Figure 2 A magnified view of part A in FIG;

[0015] Figure 4 This utility model Figure 2 A magnified view of part B in FIG;

[0016] Figure 5 This is a radial cross-sectional view of the iron core body and winding of the utility model;

[0017] Figure 6 This utility model Figure 5 Enlarged view of part C in ;

[0018] Figure 7 It is a structural diagram of the iron core body and the iron core ring of the utility model;

[0019] Figure 8 It is a structural schematic diagram of the stator of the utility model.

[0020] Among them, the main marks of the drawings are as follows:

[0021] 10- flat iron core, 101- first end face, 102- second end face, 103- first groove, 104- second groove, 105- right tooth, 106- right stator slot, 107- third end face, 11- right pole shoe;

[0022] 20- iron core body, 201- left end face, 202- right end face, 203- left groove, 204- right groove, 205- tooth portion, 206- stator slot, 207- outer end face, 21- pole shoe;

[0023] 30- iron core ring, 40- winding, 50- insulation paper. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower", "left", "right", "front", "back" and similar expressions used herein are for illustrative purposes only and are not intended to limit the present invention.

[0025] A stator structure includes a stator core, which includes a core body 20 and a core ring 30 sleeved on the outer circumference of the core body 20. The core body 20 is annular and is provided with a plurality of teeth 205. The plurality of teeth 205 are arranged in an array on the inner side of the core body 20, and stator slots 206 are defined between each adjacent two of the plurality of teeth 205; each of the plurality of teeth 205 is provided with a pole shoe 21; the distance between each two adjacent pole shoes 21 is less than the distance between two adjacent teeth 205; and a winding 40, which is arranged in the stator slot 206.

[0026] In some embodiments, the cross-section of each of the plurality of teeth 205 is trapezoidal.

[0027] In some embodiments, the core body 20 has a left end surface 201 and a right end surface 202 , and the left end surface 201 and the right end surface 202 are fixedly connected by welding.

[0028] In some embodiments, the core body 20 further has an outer end surface 207 , and the outer end surface 207 is provided with a plurality of grooves.

[0029] In some embodiments, the plurality of grooves include a left groove 203 close to the left end surface 201 and a right groove 204 close to the right end surface 202 .

[0030] In some embodiments, the core ring 30 and the core body 20 are arranged along the same axial direction, and the core ring 30 is sleeved on the outer circumference of the core body 20 ; the core ring 30 and the core body 20 are interference fit.

[0031] In some embodiments, insulating paper 50 is disposed between the core body 20 and the winding 40 .

[0032] like Figure 1 As shown, the stator core of the present application includes a ring-shaped core body 20, which is formed by bending and winding a strip-shaped flat core 10; specifically, as shown in FIG. Figures 2 to 4The figure shows a schematic diagram of the structure of a strip-shaped flat core 10. A plurality of right teeth 105 are evenly spaced at the right end of the flat core 10. Right stator slots 106 are defined between each adjacent pair of right teeth 105. The flat core 10 is bent toward the right teeth 105 to form a circular core body 20. Therefore, the stator structure of the present application is simple to form, saves labor, and improves assembly efficiency.

[0033] like Figures 1 to 7 As shown, the flat core 10 has a first end face 101, a second end face 102, and a third end face 107. When the flat core 10 is wound to form a circular core body 20, the first end face 101 of the flat core 10 forms the left end face 201 of the core body 20, the second end face 102 of the flat core 10 forms the right end face 202 of the core body 20, and the third end face 107 of the flat core 10 forms the outer end face 207 of the core body 20. After winding, the right tooth portion 105 of the flat core 10 forms the tooth portion 205 of the core body 20. Multiple tooth portions 205 are formed on the inner side of the core body 20. A stator slot 206 is formed between each two adjacent tooth portions 205. Therefore, the core body 20 is formed with multiple stator slots 206 in a circumferential array. The multiple stator slots 206 penetrate the core body 20 along the axial direction of the core body 20. The multiple stator slots 206 extend radially along the inner surface of the core body 20. The stator slots 206 are used to accommodate the windings 40.

[0034] like Figure 3 、 Figure 4 and Figure 6 As shown, a first groove 103 is provided at a portion of the flat core 10 close to the first end face 101, and a second groove 104 is provided at a portion of the flat core 10 close to the second end face 102. After the flat core 10 is wound to form the core body 20, the first groove 103 of the flat core 10 forms a left groove 203 of the core body 20, and the second groove 104 of the flat core 10 forms a right groove 204 of the core body 20. The left groove 203 and the right groove 204 are formed by a radial depression of the outer end face 207. The left groove 203 and the right groove 204 are used to limit and fix the flat core 10 with the bending equipment during the winding process to facilitate bending.

[0035] like Figure 5 and Figure 6 As shown, the left end face 201 and the right end face 202 of the core body 20 are butted against each other and fixed at the butt joint by welding; laser welding is used in this application but is not limited to it.

[0036] In the present application, the cross-section of the right tooth portion 105 of the flat iron core 10 is trapezoidal, and the size of the left end of the right tooth portion 105 is larger than the size of the right end. Therefore, the size of the left end of the right stator slot 106 between two adjacent right tooth portions 105 is smaller than the size of the right end, so that the size of the opening of the right stator slot 106 is larger, which facilitates the insertion of the winding 40 into the stator slot 106.

[0037] like Figure 3 As shown, a right pole shoe 11 is provided at the right end of each right tooth portion 105. The pole shoe is a structure provided to improve magnetic field distribution, wherein the width of the right pole shoe 11 is greater than the width of the right tooth portion 105 at the connection point. In this application, the cross-section of each right tooth portion 105 is trapezoidal, and the end of each right tooth portion 105 connected to the right pole shoe 11 is the short side of the trapezoid. In addition, the present application is to insert the winding 40 into the flat iron core 10 and then wind the flat iron core 10 and the winding 40 at the same time to form a circular ring shape. Therefore, in the flat iron core 10, the distance between the right pole shoes 11 of the two adjacent right tooth portions 105 is large, which facilitates the winding 40 to be accommodated in the stator slot 106 from between the two adjacent right pole shoes 11; after the flat iron core 10 and the winding 40 are simultaneously wound into a circular ring structure, the flat iron core 10 forms a circular iron core body 20, and the distance between the ends of the two adjacent tooth portions 205 in the iron core body 20 is reduced. At the same time, the spacing between the two adjacent pole shoes 21 becomes smaller, that is, a' is less than a, so the two adjacent tooth portions 205 and the pole shoes 21 firmly confine the winding 40 in the stator slot 206, preventing the winding from falling off, while improving the slot fill rate of the stator, thereby improving the performance of the motor.

[0038] like Figure 7 As shown, the stator structure of the present application also includes a core ring 60. The core ring 60 is a circular ring-shaped structure. The core ring 60 is made of the same material as the core body 20. The core ring 60 is sleeved on the outer periphery of the core body 20 and is arranged along the same axial direction as the core body 20. The core ring 60 and the core body 20 are interference fit so that the core ring 60 and the core body 20 are firmly connected. The axial dimension of the core ring 60 is the same as the axial dimension of the core body 20, ensuring that the axial ends of the core ring 60 after assembly are flush with the core body 20, ensuring the consistency of the stator structure. Since the core body 20 of the present application is formed by winding the flat core 10 into a circular ring-shaped structure, in order to facilitate the winding of the flat core 10 into a circle, the thickness of the flat core 10 is relatively small. The stator structure in this example is provided with 80 stator slots, and the thickness of the flat core 10 (including the tooth portion) is 16 mm. Figure 6As shown in the figure, b=16mm. The core body 20 directly wound with the flat core 10 cannot meet the magnetic flux requirements. If the radius of the stator is not appropriate, it may cause the magnetic resistance of the magnetic circuit to change, affecting the size and distribution of the magnetic flux, and thus affecting the performance of the motor. Therefore, a core ring 30 is set on the outer periphery of the core body 20. In this example, the thickness of the core ring 30 is 10mm to increase the radius of the core body 20. The core ring 30 and the core body 20 together form the stator core to ensure the performance of the motor. In this application, there is no specific limitation on the thickness of the flat core and the thickness of the core ring. The corresponding thickness can be selected according to actual conditions to meet the needs.

[0039] In some embodiments, insulating paper 50 is disposed between the core body 20 and the winding 40 .

[0040] like Figure 3 and Figure 6 As shown, in the present application, insulating paper 50 is first placed in each stator slot 106 of the flat core 10, and then the shaped winding 40 is inserted into the multiple stator slots 106 of the flat core 10. After the winding 40 and the flat core 10 are wound simultaneously to form a circular structure, the insulating paper 50 in each stator slot 206 is arranged between the core body 20 and the winding 40. The insulating paper 50 is used for insulation between the winding 40 and the core body 20 to prevent current leakage and ensure the safety of the motor.

[0041] The motor stator of the present application comprises a core body 20 formed by winding a flat core 10. The stator core comprises the core body 20 and a core ring 30 sleeved around the outer periphery of the core body 20 to meet the magnetic flux requirements and ensure the performance of the motor. The spacing between each adjacent right pole shoes 11 of the flat core 10 is large, allowing the winding 40 to be inserted into the plurality of right stator slots 106 of the flat core 10. The winding 40 and the flat core 10 simultaneously form a circular ring-shaped structure, thereby reducing the spacing between each adjacent pole shoes 21 of the circular core body 20, firmly confining the winding 40 within the plurality of stator slots 206. The core ring 30 is also provided around the outer periphery of the core body 20. The stator core of the present application can firmly confine the winding in the stator slots, increasing the stator slot fill rate, thereby improving the performance of the motor. Furthermore, the stator structure of the present application is simple to form, saving labor time and improving assembly efficiency.

[0042] In this utility model, unless otherwise expressly specified or limited, terms such as "install," "install," "connect," and "fix" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0044] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0045] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of this application.

Claims

1. A motor stator, characterized in that: include: A stator core, comprising a core body (20) and a core ring (30) sleeved on the outer periphery of the core body (20); the core body (20) is annular, and the core body (20) is provided with a plurality of teeth, the plurality of teeth being arranged in an array on the inner side of the core body (20), and a stator slot (206) being defined between each adjacent two of the plurality of teeth; and each of the plurality of teeth is provided with a pole shoe (21); and A winding (40) is disposed in the stator slot (206).

2. The motor stator according to claim 1, characterized in that: A radial cross-section of each of the plurality of teeth is trapezoidal.

3. The motor stator according to claim 2, characterized in that: The core body (20) has a left end surface (201) and a right end surface (202), and the left end surface (201) and the right end surface (202) are connected by welding.

4. The motor stator according to claim 3, characterized in that: The core body (20) further comprises an outer end surface (207), and a plurality of grooves are provided on the outer end surface (207).

5. The motor stator according to claim 4, characterized in that: The plurality of grooves include a left groove (203) close to the left end surface (201) and a right groove (204) close to the right end surface (202).

6. The motor stator according to claim 5, characterized in that: The core ring (30) and the core body (20) are arranged along the same axial direction; the core ring (30) and the core body (20) are interference fit.

7. The motor stator according to claim 6, characterized in that: Insulation paper (50) is provided between the core body (20) and the winding (40).

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