Permanent magnet motor stator assembly of mixed magnetic conductive material for compressor and refrigeration compressor

Abstract

The utility model belongs to the technical field of compressors, and particularly discloses a permanent magnet motor stator assembly of a mixed magnetic conductive material for a compressor and a refrigeration compressor. The whole permanent magnet motor stator assembly adopts a sandwich type structure, the outer layer is the stator iron core made of the silicon steel material, and the silicon steel material provides appearance support; the mounting grooves are formed in the connecting positions of the stator yoke and the stator teeth, the filling blocks in the mounting grooves are made of amorphous materials, the shape is simple, and stamping and machining are easy. In addition, packaging sheets are arranged at the two ends of the stator core, so that the amorphous material is prevented from being damaged due to external collision. According to the permanent magnet motor stator assembly of the utility model, the amorphous material and the silicon steel material are adopted as the mixed magnetic conductive material, so that the iron core loss of the tooth yoke part in the permanent magnet motor stator assembly can be reduced, and therefore, the motor efficiency can be improved, performance improvement can be ensured to the greatest extent, and the assembly can be compatible with the existing mechanical structure; and rapid use and mass production are facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, and relates to a permanent magnet motor stator assembly and a refrigeration compressor using a hybrid magnetic material. Background Technology

[0002] To meet the demands for high efficiency and energy saving, the stator components of permanent magnet motors used in refrigeration compressors typically employ higher-grade silicon steel to reduce losses. Amorphous materials, as ultra-thin, highly permeable magnetic materials, can reduce iron losses by approximately 70% compared to traditional silicon steel. However, amorphous materials face a series of challenges in practical applications.

[0003] First, the hardness of amorphous materials is approximately four times that of ordinary silicon steel, which makes die wear particularly prominent during motor lamination manufacturing, significantly increasing the frequency of die repair. Second, the thickness of amorphous ribbon is extremely thin, only about 0.025 mm, equivalent to 1 / 14 to 1 / 20 of the thickness of ordinary silicon steel. Therefore, when producing motors with the same lamination thickness, the number of stamping passes in the die needs to be increased by 14 to 20 times, resulting in a significant reduction in the output of motors produced using the same die.

[0004] To address the aforementioned issues, several improvements have been proposed. For example, in motor lamination design, increasing the transition chamfer can prevent stress concentration and mold breakage during stamping, thereby extending mold life. However, these measures cannot fundamentally solve the mold wear problem caused by the high hardness of amorphous materials. Another method is to use wire EDM instead of mold stamping, but this method also suffers from low output and difficulty in guaranteeing the dimensional tolerances of the motor, thus affecting subsequent motor production processes.

[0005] Furthermore, to minimize mold wear, the motor can also adopt a disc-type axial flux motor core structure, which extends the mold's lifespan by reducing the stamping area and ensuring uniform force distribution during stamping. However, this structural change makes the motor incompatible with existing mechanical structures. Not only does the installation scheme need to be redesigned, but the original integrated stamping or wire cutting processes cannot meet the production capacity and size requirements of the new structure motor.

[0006] In summary, the structure of the permanent magnet motor stator assembly for compressors in the existing technology needs further improvement. Utility Model Content

[0007] The purpose of this invention is to propose a permanent magnet motor stator assembly with a hybrid magnetic material for compressors, which can be applied to refrigeration compressors. This permanent magnet motor stator assembly can reduce core loss while achieving compatibility with existing mechanical structures and is easy to manufacture.

[0008] To achieve the above objectives, this utility model adopts the following technical solution:

[0009] A permanent magnet motor stator assembly for compressors using a hybrid magnetic material includes a stator core, a filler block, and a package plate.

[0010] The stator core is made of silicon steel and includes a stator yoke and stator teeth.

[0011] The stator yoke is configured as a ring structure, and the inner wall of the stator yoke is provided with a number of stator teeth along the circumference. The number of stator teeth are arranged at equal intervals, and an installation groove is provided at the connection between the stator yoke and the stator teeth.

[0012] The filler block is placed in the mounting groove and is made of amorphous material;

[0013] The encapsulation plates are disposed on the upper and lower surfaces of the stator core and are made of silicon steel.

[0014] Preferably, the upper and lower surfaces of the stator core are provided with raised fastening points;

[0015] The side of the encapsulation sheet closest to the stator core has a recessed point that mates with the snap-fit ​​point.

[0016] Preferably, the filling block adopts a T-shaped structure.

[0017] Preferably, the T-shaped filler block is formed by bonding two linear amorphous stacked blocks together.

[0018] Preferably, the filling block adopts a square or trapezoidal structure.

[0019] Preferably, the contour edge on the side of the filling block is chamfered.

[0020] Preferably, the stator yoke and stator teeth are an integrated structure.

[0021] Preferably, the stator core and the encapsulation sheet are made of laminated silicon steel sheets.

[0022] A refrigeration compressor, wherein the refrigeration compressor is provided with the above-mentioned permanent magnet motor stator assembly of a compressor using a hybrid magnetic material.

[0023] Compared with the prior art, this utility model has the following advantages:

[0024] As described above, this utility model discloses a permanent magnet motor stator assembly using a hybrid magnetic material for compressors, applied to refrigeration compressors. The permanent magnet motor stator assembly of this utility model adopts a sandwich structure, with the outer layer being a stator core made of silicon steel. An mounting groove is formed at the connection between the stator yoke and the stator teeth, and a filler block made of amorphous material is placed within the mounting groove. This combines two magnetic materials: the silicon steel material provides external support, while the amorphous material filler block has a relatively simple shape, is easy to stamp and process, and also helps reduce mold wear. Furthermore, the permanent magnet motor stator assembly also has silicon steel encapsulation plates at both ends of the stator core to prevent damage to the amorphous material from external impacts. This utility model's permanent magnet motor stator assembly, through the hybrid magnetic material composed of amorphous and silicon steel, reduces core loss in the yoke portion of the permanent magnet motor stator assembly, thereby improving motor efficiency. It maximizes performance improvement while maintaining compatibility with existing mechanical structures, does not affect the installation of the original mechanical pump body, and facilitates rapid deployment and mass production. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0026] Figure 1 This is an exploded structural diagram of the permanent magnet motor stator assembly using a hybrid magnetic material for the compressor, as described in this utility model embodiment.

[0027] Figure 2 This is a schematic diagram of the stator core structure in an embodiment of this utility model;

[0028] Figure 3 This is a schematic diagram of the packaging sheet in an embodiment of the present invention.

[0029] Among them, 1-stator core, 11-stator yoke, 12-stator tooth, 13-mounting slot, 2-filler block, 3-encapsulation piece. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] Example 1

[0037] like Figures 1 to 3 As shown, the permanent magnet motor stator assembly for compressors using mixed magnetic materials in this embodiment includes a stator core 1, a filler block 2, and a packaged sheet 3.

[0038] The stator core 1 is made of silicon steel and includes a stator yoke 11 and stator teeth 12.

[0039] The stator yoke 11 is configured as a ring structure, and the inner wall of the stator yoke 11 is provided with a number of stator teeth 12 along the circumferential direction, and the number of stator teeth 12 are arranged at equal intervals.

[0040] An installation groove 13 is also provided at the connection between the stator yoke 11 and the stator tooth 12. A filler block 2 is placed in the installation groove 13. The filler block 2 is made of amorphous material and serves as a magnetic conductor.

[0041] The filler block 2 preferably adopts a T-shaped structure, which is formed by bonding two straight amorphous stacked blocks. In this embodiment, the stator core 1 is made of ordinary silicon steel sheets, and the lamination tooth yoke has a T-shaped hollow, forming a mounting groove 13 for placing the T-shaped filler block 2. Due to the hollow, the width of the connecting section of the lamination is reduced, and the minimum width of the connecting section is set to be greater than 1 mm.

[0042] In addition, the filler block 2 can also adopt a square or trapezoidal structure. The filler block 2 is formed by die stamping or other equipment cutting. Compared with the complex structure of the stamped piece, the filler block 2 in this utility model has a simpler shape and is easier to process.

[0043] If it is formed by die stamping, the edge of the side of the filler block 2 is preferably chamfered. The T-shaped filler block 2 is rounded, and the chamfer is greater than 1.5mm, which can better avoid the mold breakage phenomenon caused by stress concentration during stamping.

[0044] The encapsulation sheet 3 is disposed on the upper and lower surfaces of the stator core 1, and the encapsulation sheet 3 is made of silicon steel.

[0045] In this embodiment, the encapsulation sheet 3 is made of conventional stator core laminations stacked together. Because amorphous materials are relatively brittle and easily damaged during motor molding, the encapsulation sheet 3, made of silicon steel laminations on both sides, eliminates the need for special protection and allows for subsequent processes such as insulation assembly and winding to be completed according to the original process. Compared to other encapsulation methods, such as plastic encapsulation, which alter existing motor parts, the permanent magnet motor stator assembly of this invention does not create new materials. It uses silicon steel laminations directly on both sides of the stator core 1 for encapsulation, without changing other motor parts, resulting in a simple process and low investment.

[0046] In this embodiment, the stator yoke 11 and stator teeth 12 are preferably integrated.

[0047] Both the stator core 1 and the encapsulation sheet 3 are made of laminated silicon steel sheets. Ordinary high-efficiency silicon steel provides the external support, ensuring compatibility with existing mechanical structures. This allows for seamless integration with other mechanical components without altering the installation plan, while also preventing damage to the amorphous material from external impacts. Specifically, in this embodiment, the stator core 1 and the encapsulation sheet 3 are made of conventional thickness silicon steel sheets or ultra-thin silicon steel sheets, with thicknesses ranging from 0.2 mm to 0.5 mm.

[0048] In addition, in this embodiment, the upper and lower surfaces of the stator core 1 are provided with raised fastening points, and the side of the encapsulation sheet 3 near the stator core 1 is provided with recessed points that mate with the fastening points. The preferred single-sided stacking thickness range is (1.5mm, 3mm). By cooperating with the raised fastening points and the recessed points, the encapsulation sheet can be installed on the upper and lower surfaces of the stator core 1. Of course, the raised fastening points can also be provided on the encapsulation sheet 3, in which case the corresponding surface of the stator core 1 is provided with recessed points that mate with the fastening points. In addition to encapsulation, the encapsulation sheet 3 can also serve as a support and magnetic conductor.

[0049] The stator assembly of this invention is applicable to permanent magnet motors, and its pole-slot configuration is not limited to 6 poles and 9 slots. For permanent magnet motors used in traditional refrigeration compressors, their stator assemblies are generally composed of one type of magnetic material. In this invention, the stator assembly is composed of two types of magnetic materials, combining the high magnetic permeability of amorphous materials with the ease of processing of ordinary silicon steel. This hybrid magnetic material improves motor efficiency while reducing the processing requirements for amorphous materials. Compared to complete stator laminations, the filler block 2 of T-shaped structures is smaller in size, has a simpler structure, lower requirements for molds, and is more conducive to mass production.

[0050] Example 2

[0051] A refrigeration compressor, wherein the refrigeration compressor is equipped with a permanent magnet motor stator assembly of a compressor using a hybrid magnetic material as described in Embodiment 1.

[0052] The permanent magnet motor stator assembly using a hybrid magnetic material in this refrigeration compressor adopts a sandwich structure without changing the existing motor structure. The outer layer is a stator core made of ordinary high-efficiency silicon steel, with a hollow toothed yoke section housing amorphous material filler blocks. The stator core is further sealed on both sides using multi-layered ordinary high-efficiency silicon steel sheets. The combination of the two magnetic materials, with the ordinary high-efficiency silicon steel providing external support and preventing damage to the amorphous material from external impacts, allows for seamless integration with other mechanical components without requiring modifications. The amorphous blocks are simple square or trapezoidal shapes, making them easier to stamp or process in other ways compared to the complex structure of laminations. This facilitates production.

[0053] The present embodiment has now been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the permanent magnet motor stator assembly and refrigeration compressor of the present invention using a hybrid magnetic material.

[0054] This invention relates to a permanent magnet motor stator assembly using a hybrid magnetic material for compressors, applied to refrigeration compressors. The stator assembly employs a sandwich structure, with an outer stator core made of silicon steel. Mounting grooves are formed at the connection between the stator yoke and stator teeth, and filling blocks made of amorphous material are placed within these grooves. This combination of two magnetic materials—silicon steel for external support and amorphous material filling blocks with a simpler shape, easier to stamp and process, and less wear on the mold—further enhances the motor's performance. Additionally, silicon steel encapsulation plates are placed at both ends of the stator core to prevent damage to the amorphous material from external impacts. This invention, through the use of a hybrid magnetic material of amorphous and silicon steel, reduces core loss in the yoke portion of the permanent magnet motor stator assembly, thereby improving motor efficiency. It maximizes performance improvement while maintaining compatibility with existing mechanical structures, without affecting the installation of the original mechanical pump body, facilitating rapid deployment and mass production.

[0055] Of course, the above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model and should be protected by the present utility model.

Claims

1. A permanent magnet motor stator assembly using a hybrid magnetic material for a compressor, characterized in that, Includes stator core, filler blocks, and encapsulation sheets; The stator core is made of silicon steel and includes a stator yoke and stator teeth. The stator yoke is configured as a ring structure, and the inner wall of the stator yoke is provided with a number of stator teeth along the circumference. The number of stator teeth are arranged at equal intervals, and an installation groove is provided at the connection between the stator yoke and the stator teeth. The filler block is disposed in the mounting groove and is made of amorphous material; The encapsulation sheet is disposed on the upper and lower surfaces of the stator core and is made of silicon steel.

2. The permanent magnet motor stator assembly for a compressor using a hybrid magnetic material according to claim 1, characterized in that, The upper and lower surfaces of the stator core are provided with raised fastening points; The encapsulation sheet has a recessed point on the side near the stator core that mates with the snap-fit ​​point.

3. The permanent magnet motor stator assembly for a compressor using a hybrid magnetic material according to claim 1, characterized in that, The filling block adopts a T-shaped structure.

4. The permanent magnet motor stator assembly for a compressor using a hybrid magnetic material according to claim 3, characterized in that, The T-shaped filler block is formed by bonding two linear amorphous stacked blocks together.

5. The permanent magnet motor stator assembly for a compressor using a hybrid magnetic material according to claim 1, characterized in that, The filling block adopts a square or trapezoidal structure.

6. The permanent magnet motor stator assembly for a compressor using a hybrid magnetic material according to claim 1, characterized in that, The edges of the infill block are chamfered.

7. The permanent magnet motor stator assembly for a compressor using a hybrid magnetic material according to claim 1, characterized in that, The stator yoke and the stator teeth are an integrated structure.

8. The permanent magnet motor stator assembly for a compressor using a hybrid magnetic material according to claim 1, characterized in that, The stator core and the encapsulation sheet are made of stacked silicon steel sheets.

9. A refrigeration compressor, characterized in that, The refrigeration compressor is equipped with a permanent magnet motor stator assembly made of a hybrid magnetic material as described in any one of claims 1 to 8.

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