Stator punching sheet structure of synchronous generator

Abstract

The utility model discloses a stator punching sheet structure of a synchronous generator, which belongs to the technical field of motors and comprises a punching sheet body, a central hole is arranged on the punching sheet body, and two groups of wire embedding groove groups which are symmetrically arranged about the axis of the central hole are arranged on the punching sheet body. Each wire embedding groove group comprises a plurality of wire embedding grooves which are circumferentially arranged at equal-angle intervals by taking the axis of the central hole as the center, the wire embedding grooves are communicated with the central hole, and slotless sections are arranged between the opposite end parts of the two wire embedding groove groups. Compared with a traditional generator punching sheet in which the wire embedding grooves are arranged at equal intervals in the circumferential direction, the generator punching sheet provided by the utility model has the advantages that material waste and cost are reduced through arranging the slotless sections; the magnetic circuit of the stator core is optimized, the magnetic resistance is reduced, the distribution uniformity of the magnetic flux density is improved, and the electromagnetic performance of the generator is further improved; moreover, the design of the wire embedding grooves improves the heat dissipation effect, reduces the temperature of the motor during operation, makes full use of the space, and achieves higher power.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a stator lamination structure for a synchronous generator. Background Technology

[0002] The existing stator laminations for 3-8KW small synchronous generator motors have the following shortcomings: the shape and size design of the winding slots are unreasonable, which may cause uneven magnetic field distribution, increase harmonics, reduce the motor's operating performance and power factor, and also lead to poor heat dissipation. Long-term operation can easily cause the motor to overheat and shorten its life. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a stator lamination structure for a synchronous generator, which optimizes the winding slots to reduce magnetic resistance, improve the uniformity of magnetic flux density distribution, and thus improve the electromagnetic performance of the generator.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model provides a stator lamination structure for a synchronous generator, comprising: a lamination body, wherein the lamination body has a central hole, and the lamination body is provided with two sets of symmetrically arranged slots about the central hole. Each set of slots includes multiple slots spaced at equal angles around the central hole. The slots are connected to the central hole, and slotless sections are provided between the opposite ends of the two sets of slots.

[0006] Furthermore, the circumference lengths of the two grooveless segments are equal.

[0007] Furthermore, the grooveless section is provided with multiple notches that communicate with the central hole, and the multiple notches are arranged at equal angular intervals around the axis of the central hole.

[0008] Furthermore, the outer wall of the lamination body is provided with two arc-shaped segments. The two arc-shaped segments are symmetrically arranged about the central axis of the two sets of groove groups. A straight segment is provided between the opposite ends of the two arc-shaped segments. The two straight segments are symmetrically arranged about the central axis of the two grooveless segments. A first weld is provided at the connection between the arc-shaped segments and the straight segments. Two second welds are provided on each arc-shaped segment, which are symmetrically arranged about the central axis of the two grooveless segments.

[0009] Furthermore, both the first weld and the second weld are designed to be wavy.

[0010] Furthermore, the minimum depth of the first weld and the second weld is not less than 0.35 mm.

[0011] Furthermore, the groove has a bottom diameter of φ140mm, a groove opening width of 2.8mm, a tooth width of 4.4mm, and a bottom chamfer of R2.6mm.

[0012] The beneficial effects of this utility model are as follows: Compared with the traditional generator laminations with equally spaced slots around the circumference, this solution reduces material waste and lowers costs by setting slotless sections; it optimizes the magnetic circuit of the stator core, reduces magnetic resistance, and improves the uniformity of magnetic flux density distribution, thereby improving the electromagnetic performance of the generator; and the slot design improves heat dissipation, reduces the temperature of the motor during operation, makes full use of space, and achieves higher power.

[0013] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0014] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0015] Figure 1 This is a schematic diagram of the lamination body structure according to an embodiment of the present utility model;

[0016] Figure 2 This is an embodiment of the present utility model. Figure 1 A magnified view of part A in the middle;

[0017] Figure 3 This is an embodiment of the present utility model. Figure 1 Enlarged view of part B in the middle

[0018] Figure 4 This is an embodiment of the present utility model. Figure 1 A magnified view of part C in the middle.

[0019] The following are the markings in the attached diagram: 1. Stamp body, 101. Center hole, 102. Arc segment, 103. Straight segment, 2. Embedded groove, 3. Grooveless segment, 301. Notch, 4. First weld, 5. Second weld. Detailed Implementation

[0020] like Figures 1-4As shown, this utility model provides a synchronous generator stator lamination structure, including: a lamination body 1, the lamination body 1 having a central hole 101, the lamination body 1 having two sets of symmetrically arranged wire grooves 2 about the central hole 101, each set of wire grooves 2 including multiple wire grooves 2 arranged at equal angular intervals around the central hole 101, the wire grooves 2 communicating with the central hole 101, and a grooveless section 3 between the opposite ends of the two sets of wire grooves 2.

[0021] In this design, the slotless section 3 does not have the winding slot 2. Compared to the traditional generator laminations where the winding slot 2 is evenly spaced circumferentially, this design achieves the purpose of removing part of the winding slot by setting a slotless section. Removing part of the winding slot can effectively reduce temperature rise and increase magnetic flux. Compared with existing stator laminations, this design greatly saves materials and reduces costs; it optimizes the magnetic circuit of the stator core, reduces magnetic resistance, and improves the uniformity of magnetic flux density distribution, thereby improving the electromagnetic performance of the generator; and compared with existing stator laminations, the design of the winding slot 2 improves heat dissipation by increasing the slot area, reducing the temperature of the motor during operation, making full use of space, and achieving higher power. The slot bottom diameter of the winding slot in this design is φ140, the slot opening width is 2.8, the tooth width is 4.4, and the slot bottom chamfer is R2.6. Compared with the slot opening of the stator laminations of traditional synchronous generators, this design increases the slot area, which can achieve the effect of reducing temperature rise, while providing better load capacity and reducing copper loss, thus achieving the goal of saving costs.

[0022] In one embodiment of this utility model, the circumferential lengths of the two grooveless segments 3 are equal.

[0023] In one embodiment of this utility model, the slotless section 3 is provided with multiple notches 301. The design of the notches 301 can reduce temperature rise and increase magnetic flux, which is of great significance in terms of material saving, which is conducive to reducing costs and facilitating mass production in factories. The multiple notches 301 are arranged at equal angular intervals around the axis of the central hole 101.

[0024] In one embodiment of this utility model, the outer wall of the lamination body 1 is provided with two arc-shaped segments 102. The two arc-shaped segments 102 are symmetrically arranged about the central axis of the two sets of grooves 2. A straight segment 103 is provided between the opposite ends of the two arc-shaped segments 102. The two straight segments 103 are symmetrically arranged about the central axis of the two grooveless segments 3. A first weld 4 is provided at the connection between the arc-shaped segment 102 and the straight segment 103. Since one end is connected to the straight segment 103, the first weld 4 uses less material. Each arc-shaped segment 102 is provided with two second welds 5 symmetrically arranged about the central axis of the two grooveless segments 3. The welds on the arc-shaped segments 102 need to ensure welding strength, and the welding depth at both locations needs to be ≥0.35.

[0025] In this design, by setting a first weld 4 and a second weld 5, the first weld 4, being located on the straight segment 103, requires less material to manufacture. This two-weld design saves costs while ensuring welding strength. After welding, it guarantees the integrity and stability of the stator structure, enabling the stator to withstand various mechanical stresses and vibrations during operation. Furthermore, it enhances mechanical strength, allowing the stator to withstand larger torques and adapt to different working conditions and load variations.

[0026] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A stator lamination structure for a synchronous generator, comprising: The lamination body is characterized in that it has a central hole and two sets of symmetrically arranged embedding grooves about the central hole. Each set of embedding grooves includes multiple embedding grooves spaced at equal angles around the central hole. The embedding grooves are connected to the central hole. There is a grooveless section between the opposite ends of the two sets of embedding grooves. The bottom diameter of the embedding groove is φ140mm, the groove opening width is 2.8mm, the tooth width is 4.4mm, and the bottom chamfer is R2.6mm.

2. The synchronous generator stator lamination structure according to claim 1, characterized in that: The two grooveless segments have the same circumference.

3. The synchronous generator stator lamination structure according to claim 2, characterized in that: The grooveless section is provided with multiple notches that communicate with the central hole, and the multiple notches are arranged at equal angular intervals around the axis of the central hole.

4. The synchronous generator stator lamination structure according to claim 3, characterized in that: The outer wall of the lamination body is provided with two arc-shaped segments. The two arc-shaped segments are symmetrically arranged about the central axis of the two sets of groove groups. A straight segment is provided between the opposite ends of the two arc-shaped segments. The two straight segments are symmetrically arranged about the central axis of the two grooveless segments. A first weld is provided at the connection between the arc-shaped segments and the straight segments. Two second welds are provided on each arc-shaped segment, which are symmetrically arranged about the central axis of the two grooveless segments.

5. The synchronous generator stator lamination structure according to claim 4, characterized in that: Both the first weld and the second weld are designed to be wavy.

6. The synchronous generator stator lamination structure according to claim 5, characterized in that: The minimum depth of the first weld and the second weld shall not be less than 0.35 mm.

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