High-efficiency series excited motor stator core

Abstract

The utility model relates to a high-efficiency series excited motor stator core, which is formed by axially stacking a plurality of silicon steel sheets, each layer of silicon steel sheet comprises tooth parts which are integrally connected, the number of the tooth parts is two, the inner end face of each tooth part is arc-shaped, the pole arc angle of the inner end face is 105-125 degrees, and each tooth part is provided with two wing parts extending towards the side face; the yoke part is arranged in a rectangular shape, an outer chamfer is arranged on the outer side of each corner part, an inner chamfer is arranged on the inner side of each corner part, the long edge of the yoke part is connected with the tooth parts, and stator grooves are formed in the two sides of each tooth part; the yoke part is provided with a convex part protruding inwards, the width of the convex part is larger than the distance between the tooth parts, and each convex part is formed by connecting two symmetrical arc-shaped sections; each stator slot sequentially comprises a first edge, a second edge, an inner chamfer and a third edge from the tooth part to the convex part, the first edge is an inclined surface, and one surface close to the tooth part is an inclined surface, so that the width of the tooth part is gradually increased inwards, the second edge and the third edge of the same stator slot are vertical, and the length of the second edge is greater than that of the third edge.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a high-efficiency series motor stator core. Background Technology

[0002] The existing 54 series motor stator core has structural defects, resulting in low manufacturability, excessively high slot fill factor, and low efficiency, which cannot meet the requirements. Utility Model Content

[0003] In view of the above situation, it is necessary to propose a high-efficiency series-wound motor stator core.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a high-efficiency series-wound motor stator core, formed by axially stacking several silicon steel sheets, each layer of the silicon steel sheets comprising integrally connected components.

[0005] The toothed part has two symmetrically arranged teeth, and the inner end face of each tooth is arc-shaped with an arc angle of 105-125 degrees. Each tooth has two wings extending to the side.

[0006] The yoke is rectangular in shape and has an outer chamfer on the outside and an inner chamfer on the inside of each corner. The long side of the yoke is connected to the toothed part, and a certain sub-groove is formed on both sides of each toothed part.

[0007] The yoke between two connected stator slots has an inwardly protruding convex portion. The width of the convex portion is greater than the distance between two opposing teeth. Each convex portion is formed by two symmetrical arc segments connected together. The stator slot from the teeth to the convex portion includes a first side, a second side, an inner chamfer, and a third side in sequence. The first side is a slope, and the side closest to the teeth is a slope, so that the width of the teeth gradually increases inward. The second side of the same stator slot is perpendicular to the third side, and the length of the second side is greater than the length of the third side.

[0008] Furthermore, a positioning groove is provided on the outer side of the middle part of the long side, and the width of the positioning groove gradually decreases from the outside to the inside. The positioning grooves on the two long sides are symmetrically arranged.

[0009] Furthermore, a lead hole is provided in the middle of the short side of the yoke, and the lead holes on the two short sides are symmetrically arranged.

[0010] Furthermore, several positioning holes are provided on the short side, and the positioning holes on the two short sides are symmetrically arranged.

[0011] Furthermore, the high point of the protrusion is the connection point of the two arc segments, and the two protrusions are symmetrically arranged.

[0012] Furthermore, the height of the protrusion is 3.8-4.2 mm.

[0013] Furthermore, the distance between the two opposite short sides of the yoke is 51±0.1mm, the distance between the two opposite long sides of the yoke is 46±0.1mm, and the inner diameter formed by the teeth is 29.4±0.03mm.

[0014] Furthermore, the distance between the two teeth is 14.03±0.05mm, and the root width of the two teeth is 18.2±0.1mm.

[0015] Furthermore, the distance between the two opposing third sides is 44±0.1mm, and the distance between the two opposing second sides is 36.6±0.1mm.

[0016] Furthermore, the inner diameter of the inner chamfer is 50.6 ± 0.1 mm.

[0017] The beneficial effects of this invention are as follows: It optimizes the stator slot shape, increasing the slot area while maintaining the same stator core area, resulting in a lower slot fill factor and better manufacturability. With the same amount of silicon steel material, efficiency is increased by approximately 5%, thus offering advantages in cost and performance compared to the currently common 54 series. Furthermore, it has good versatility, being applicable to existing standard 54 series rotors. The protrusions feature a special design, formed by two connected arc-shaped segments, with a width exceeding the tooth spacing. Compared to traditional rectangular or small protrusions, this design offers significant advantages, accommodating different winding specifications and demonstrating strong versatility. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a high-efficiency series-wound motor stator core according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram showing the dimensions of a high-efficiency series-wound motor stator core according to an embodiment of this utility model.

[0020] Label Explanation:

[0021] 100. Teeth; 110. Wings; 200. Yoke; 210. Outer chamfer; 220. Long side;

[0022] 230, short side; 300, stator slot; 310, first side; 320, second side; 330, inner chamfer;

[0023] 340, Third side; 400, Protrusion; 410, Arc-shaped segment; 500, Positioning groove; 600, Lead wire hole;

[0024] 700, positioning hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of a high-efficiency series-wound motor stator core, in conjunction with the accompanying drawings and embodiments, is provided. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.

[0026] Please refer to Figures 1-2 A high-efficiency series-wound motor stator core is formed by axially stacking several silicon steel sheets, each layer of silicon steel sheets comprising integrally connected components:

[0027] There are two symmetrically arranged teeth 100. The inner end face of each tooth 100 is arc-shaped and the extreme arc angle of the inner end face is 105-125 degrees. Each tooth 100 has two wings 110 extending to the side.

[0028] The yoke 200 is rectangular and has an outer chamfer 210 on the outside and an inner chamfer 330 on the inside of each corner. The long side 220 of the yoke 200 is connected to the tooth 100 and a certain sub-groove 300 is formed on both sides of each tooth 100.

[0029] The yoke 200 between two connected stator slots 300 has an inwardly protruding convex portion. The width of the convex portion is greater than the distance between two opposing teeth 100. Each convex portion is formed by two symmetrical arc segments 410 connected together. The stator slot 300 includes a first side 310, a second side 320, an inner chamfer 330, and a third side 340 sequentially from the teeth 100 to the convex portion. The first side 310 is a slope, and the side closest to the teeth 100 is a slope, so that the width of the teeth 100 gradually increases inward. The second side 320 and the third side 340 of the same stator slot 300 are perpendicular, and the length of the second side 320 is greater than the length of the third side 340.

[0030] The stator slot 300 has been optimized, resulting in a larger area and lower slot fill factor while maintaining the same stator core footprint, thus improving manufacturability. It also achieves approximately 5% higher efficiency with the same amount of silicon steel, offering advantages in cost and performance compared to the currently used 54 series. Furthermore, it boasts good versatility, being compatible with existing standard 54 series rotors. The convex portion features a special design, formed by two connected arc-shaped segments 410, with a width exceeding the tooth spacing 100. This design offers significant advantages over traditional rectangular or small convex portions, accommodating different winding specifications and demonstrating strong versatility.

[0031] Please refer to Figure 1A positioning groove 500 is provided on the outer side of the middle part of the long side 220. The width of the positioning groove 500 gradually decreases from the outside to the inside, and the positioning grooves 500 on the two long sides 220 are symmetrically arranged. The positioning connection is made by mortise and tenon joints, which not only has high accuracy but also strong stability compared with the traditional outward expansion trapezoidal structure.

[0032] Please refer to Figure 1 A lead wire hole 600 is also provided in the middle of the short side 230 of the yoke 200, and the lead wire holes 600 on the two short sides 230 are symmetrically arranged. The lead wire hole 600 is provided for the lead wire to pass through.

[0033] Please refer to Figure 1 A plurality of positioning holes 700 are provided on the short side 230, and the positioning holes 700 on the two short sides 230 are symmetrically arranged. Preferably, each short side 230 is provided with two positioning holes 700, and the two positioning holes 700 are symmetrically arranged with the lead hole 600 as the center. Preferably, please refer to Figure 2 The inner diameter of the positioning hole 700 is 2.1±0.5mm. The inner diameter of the lead hole 600 is 3.6±0.1mm. The distance between the two positioning holes 700 on the same short side 230 is 8.53±0.1mm.

[0034] Please refer to Figure 1 and Figure 2 The highest point of the convex part is the connection point of the two arc segments, and the two convex parts are set symmetrically.

[0035] Please refer to Figure 2 The height of the protrusion is 3.8-4.2 mm. Preferably, the distance from the highest point of the protrusion to the outer side of the yoke 200 is 7.5 mm.

[0036] Please refer to Figure 2 The distance between the two opposite short sides 230 of the yoke 200 is 51±0.1mm, the distance between the two opposite long sides 220 of the yoke 200 is 46±0.1mm, and the inner diameter formed by the tooth 100 is 29.4±0.03mm.

[0037] Please refer to Figure 2 The distance between the two teeth 100 is 14.03±0.05mm, and the root width of the two teeth 100 is 18.2±0.1mm.

[0038] Please refer to Figure 2 The distance between the two opposite third sides 340 is 44±0.1mm, and the distance between the two opposite second sides 320 is 36.6±0.1mm.

[0039] Please refer to Figure 2 The inner diameter of the inner chamfer 330 is 50.6±0.1mm. Preferably, the diameter of the outer chamfer 210 is 60±0.05mm.

[0040] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0042] In summary, this utility model provides a high-efficiency series-wound motor stator core that optimizes the stator slot shape. With the same stator core area, the stator slot area is increased, resulting in a low slot fill factor and good manufacturability. Using the same amount of silicon steel, the efficiency is approximately 5% higher, thus offering advantages in cost and performance compared to the currently common 54 series rotors. Furthermore, it has good versatility and can be applied to existing standard 54 series rotors. The protrusions feature a special design, formed by two connected arc-shaped segments, with a width exceeding the tooth spacing. Compared to traditional rectangular or small protrusions, this design offers significant advantages, accommodating different winding specifications and demonstrating strong versatility.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high efficiency series excited motor stator core characterized by, formed by axially stacking a plurality of silicon steel sheets, each layer of the silicon steel sheets comprising a plurality of teeth integrally connected: two teeth, each of the teeth having an inner end face in the form of an arc with a polar arc angle of 105-125 degrees, and two wing portions extending to the side face; a yoke portion in the form of a rectangle provided with an outer chamfer on the outer side of each corner portion and an inner chamfer on the inner side, the long side of the yoke portion being connected to the teeth and forming a stator slot on both sides of each of the teeth; the yoke portion between two stator slots in communication has a protruding portion protruding inward, the width of the protruding portion being greater than the distance between the two opposite teeth, each of the protruding portions being formed by two symmetrical arc segments; the stator slot comprises a first side, a second side, an inner chamfer and a third side in sequence from the teeth to the protruding portion, the first side being a bevel, one side close to the teeth being a bevel, the width of the teeth gradually increasing inward, the second side being perpendicular to the third side, the length of the second side being greater than the length of the third side.

2. A high efficiency series motor stator core according to claim 1, characterized in that, a positioning slot is provided on the outer side of the middle portion of the long side, the width of the positioning slot gradually decreasing from the outside to the inside, the positioning slots on the two long sides being symmetrically arranged.

3. A high efficiency series motor stator core according to claim 1, characterized in that, a lead hole is further provided on the middle portion of the short side of the yoke portion, the lead holes on the two short sides being symmetrically arranged.

4. A high efficiency series motor stator core according to claim 3, characterized in that, a plurality of positioning holes are further provided on the short side, the positioning holes on the two short sides being symmetrically arranged.

5. A high efficiency series motor stator core as defined in claim 1 wherein, the high points of the protruding portions are the connection points of the two arc segments, the two protruding portions being symmetrically arranged.

6. A high efficiency series motor stator core as defined in claim 1 wherein, the height of the protruding portion is 3.8-4.2mm.

7. A high efficiency series motor stator core as defined in claim 1 wherein, the distance between the two opposite short sides of the yoke portion is 51±0.1mm, the distance between the two opposite long sides of the yoke portion is 46±0.1mm, and the inner diameter formed by the teeth is 29.4±0.03mm.

8. A high efficiency series motor stator core according to claim 7, characterized in that, the distance between the two teeth is 14.03±0.05mm, and the root width of the two teeth is 18.2±0.1mm.

9. A high efficiency series motor stator core according to claim 8, characterized in that, the distance between the two opposite third sides is 44±0.1mm, and the distance between the two opposite second sides is 36.6±0.1mm.

10. A high efficiency series motor stator core according to claim 9, characterized in that, the inner diameter of the inner chamfer is 50.6±0.1mm.

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