Spliced combined stator core

Abstract

The application discloses a spliced and combined stator core, which is formed by stacking a plurality of single-layer cores; each single-layer core comprises a plurality of annularly spliced silicon steel sheets, and a center hole is formed between the silicon steel sheets; each two adjacent silicon steel sheets are provided with a stator yoke part for fixing the two adjacent silicon steel sheets at one end away from the center hole; each silicon steel sheet comprises a tooth part, and the tooth part is provided with two extension parts respectively located at two sides at one end away from the center hole, and a slot is formed at one end of the tooth part close to one of the extension parts; and the stator yoke part is provided with a first fixing part for fixing the adjacent extension parts of the two adjacent silicon steel sheets at one end close to the center hole. The application can effectively improve the material utilization rate in the core production process without generating magnetic loss. The single silicon steel sheet has integrally formed tooth part and two extension parts, and the tooth part and the two extension parts are consistent with the direction of the magnetic lines, so that the magnetic loss of the finally spliced stator core is extremely low.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and specifically to a spliced ​​and combined stator core. Background Technology

[0002] The stator is the non-rotating part of the motor during operation. The stator generally includes the iron core, stator windings, and other components. The iron core has multiple fixed posts, and the stator windings are wound around these posts. The rotor is mounted and fixed to the motor frame via bearings or bushings. The rotor contains silicon steel sheets; in DC motors, the rotor also has coils wound around it. When all are operating, the current flowing through the coils generates a magnetic field in the stator and rotor, driving the rotor to rotate. The stator's primary function is to generate a rotating magnetic field, while the rotor's primary function is to be cut by magnetic lines of force within this rotating magnetic field, thus outputting current.

[0003] In existing technologies, stator cores are mostly constructed by stacking multiple layers of silicon steel sheets, which are then pressed and fixed together using clamping rings or other fastening components. Furthermore, each layer of silicon steel sheet is a single, integral unit, resulting in low material utilization during manufacturing. Summary of the Invention

[0004] The purpose of this invention is to provide a spliced ​​and combined stator core to improve the material utilization rate of generator stator cores.

[0005] To achieve the above objectives, one embodiment of the present invention provides a spliced ​​composite stator core, including a stator core and an upper fixing cover and a lower fixing cover for clamping the stator core. The stator core is formed by stacking multiple single-layer cores. Each single-layer core includes multiple annularly spliced ​​silicon steel sheets, with a central hole formed between the silicon steel sheets. Each pair of adjacent silicon steel sheets has a stator yoke portion for fixing the two adjacent silicon steel sheets at the end away from the central hole. Each silicon steel sheet includes a toothed portion, with two extension portions located on both sides at the end of the toothed portion away from the central hole. A notch is opened at the end of the toothed portion near one of the extension portions. The stator yoke portion has a first fixing portion for fixing the adjacent extension portions of the two adjacent silicon steel sheets at the end near the central hole. The upper fixing cover and the lower fixing cover are fastened together.

[0006] The present invention further designs the stator core as follows to form a complete stator core.

[0007] Furthermore, the silicon steel sheets are spliced ​​together to form a complete fixing hole by the grooves on the silicon steel sheets.

[0008] Furthermore, the stator yoke is provided with at least one second fixing part at the end near the central hole.

[0009] Furthermore, the second fixing part is connected to the upper fixing cover or the lower fixing cover.

[0010] Furthermore, the first and second fixing parts of the stator yoke are fixing recesses.

[0011] Furthermore, the angle between the two extensions of two silicon steel sheets in each single-layer iron core is greater than the angle between the two extensions of other silicon steel sheets located on the same single-layer iron core.

[0012] This invention has the following advantages:

[0013] 1. This invention designs a spliced, modular stator core. The single-layer stator core is composed of multiple silicon steel sheets joined together in a ring, and adjacent silicon steel sheets are fixed together by the stator yoke to form a complete single-layer core. Finally, the entire stator core is secured by upper and lower fixing shells. This invention effectively improves material utilization during the core manufacturing process without generating magnetic loss. Experiments have shown that the material utilization rate of this motorcycle generator stator core has increased from 28% to 74%, significantly reducing material waste and effectively lowering product costs.

[0014] 2. The single silicon steel sheet of the present invention has teeth and two extensions, and the teeth and two extensions are integrally formed with the teeth. The two extensions and teeth of such silicon steel sheet correspond to the direction of the magnetic lines of force. Thus, the magnetic loss of the stator core after splicing is extremely low, thereby improving the safety performance of the stator core. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a stator core according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of a silicon steel sheet according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the stator yoke according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the upper fixing shell according to an embodiment of the present invention;

[0020] Figure 5 This is a top view of a single-layer iron core according to an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of a single-layer iron core stacked according to an embodiment of the present invention.

[0022] Among them, 1-center hole, 2-silicon steel sheet, 3-stator yoke, 4-extension, 5-tooth, 6-slot, 7-first fixing part, 8-second fixing part, 9-fixing hole, 10-upper fixing cover, 11-lower fixing cover. Detailed Implementation

[0023] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] This invention proposes a spliced, modular stator core, comprising a stator core and an upper fixing cover 10 and a lower fixing cover 11 for clamping and fixing the stator core. The stator core is formed by stacking multiple single-layer core sheets, which are clamped and fixed by the interlocking upper fixing cover 10 and lower fixing cover 11. A circular central hole 1 is formed in the middle of each single-layer stator core. The central hole 1 can be used to house the generator rotor. The size of the central hole 1 can be designed and adjusted during the stamping of the silicon steel sheet 2.

[0025] In this embodiment, each single-layer iron core consists of multiple annularly spliced ​​silicon steel sheets 2 and a stator yoke 3 located away from the center hole 1 of the single-layer stator core. The silicon steel sheet 2 has a tooth 5 and two extensions 4 connected to the tooth 5, with the two extensions 4 positioned on either side of the tooth 5 away from the center hole 1. A semi-circular notch 6 is provided on the tooth 5. The circular notch 6 can be located at one end of the tooth 5 near one of the extensions 4. The stator yoke 3 has a first fixing part 7 and at least one second fixing part 8 at the end near the center hole 1. An even number of silicon steel sheets 2 are annularly spliced ​​to form a single-layer iron core. The two adjacent extensions 4 of adjacent silicon steel sheets 2 on the single-layer iron core mate with the first fixing part 7 of the stator yoke 3.

[0026] In this embodiment, multiple single-layer iron cores are stacked to form a complete stator iron core, and the stator iron core is clamped and fixed by the upper fixing cover 10 and the lower fixing cover 11.

[0027] In this embodiment, the first fixing part 7 and the second fixing part 8 can be integrally formed as a rounded rectangular fixing recess. This allows for stable mating and engagement with the contacting extension part 4.

[0028] In this embodiment, the annular splicing of silicon steel sheets 2 can make the semi-circular notches 6 on the silicon steel sheets 2 connect with each other to form a complete fixing hole 9. The fixing hole 9 can be used to place fixing components to fix the stacked single-layer iron core, making the entire stator iron core more stable.

[0029] In this embodiment, on a single-layer iron core, the included angle between the two extensions 4 of two silicon steel sheets 2 is greater than the included angle between the two extensions 4 of other silicon steel sheets 2 located on the same single-layer iron core. The extensions 4 with larger included angles can be used to wind the high-voltage coil of the stator iron core.

[0030] In this embodiment, during the stamping process, the teeth 5 of one silicon steel sheet 2 can be placed between the included angles of the two extensions 4 of another silicon steel sheet 2, thereby improving the yield of silicon steel sheet 2 during processing.

[0031] In this embodiment, stator windings are wound around adjacent extensions 4 on the stator core.

[0032] In this embodiment, multiple irregular protrusions can be designed on the upper fixing cover 10 and the lower fixing cover 11. The irregular protrusions can improve the structural strength of the upper fixing cover 10 and the lower fixing cover 11.

[0033] In this embodiment, the shape of a single silicon steel sheet 2 corresponds to the direction of the magnetic field lines, which can significantly reduce the magnetic loss of the stator core formed by splicing the cut silicon steel sheets 2.

[0034] Although specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A spliced ​​and assembled stator core, comprising a stator core and an upper fixing cover and a lower fixing cover for clamping the stator core, characterized in that, The stator core is formed by stacking multiple single-layer cores; each single-layer core includes multiple annularly spliced ​​silicon steel sheets; a central hole is formed between the multiple silicon steel sheets; and a stator yoke is provided at the end of each pair of adjacent silicon steel sheets away from the central hole to fix the two adjacent silicon steel sheets. Each of the silicon steel sheets includes a toothed portion, and the toothed portion has two extensions located on both sides at the end away from the central hole. The toothed portion has a notch at the end near one of the extensions. The stator yoke has a first fixing part at one end near the central hole, which fixes the adjacent extensions of two adjacent silicon steel sheets. The upper fixing cover and the lower fixing cover are fastened together; The stator yoke is also provided with at least one second fixing part at one end near the central hole; The second fixing part is connected to the upper fixing cover or the lower fixing cover; The first and second fixing parts of the stator yoke are fixing recesses.

2. The spliced ​​and combined stator core according to claim 1, characterized in that, The notches of the two adjacent silicon steel sheets are arranged opposite each other, and a fixing hole is formed between the two notches.

3. The spliced ​​and combined stator core according to claim 1, characterized in that, The included angle between the two extensions of two silicon steel sheets of each of the single-layer iron cores is greater than the included angle between the two extensions of other silicon steel sheets located on the same single-layer iron core.

Images