Stator core, motor, compressor and electric appliance

Abstract

The invention provides a stator core, a motor, a compressor and an electric appliance, the stator core is provided with a yoke part and a plurality of tooth parts, the plurality of tooth parts are uniformly arranged on the radial inner side of the yoke part along the circumferential direction of the stator core, and the periphery of the yoke part corresponding to the tooth parts is provided with through-flow grooves extending along the axial direction of the stator core. The radial central axis of the through-flow groove is provided with a reinforcing member which extends along the axial direction of the stator iron core. The first side face, protruding out of the bottom face of the through-flow groove, of the reinforcing piece is arranged in a curved face mode, the height, relative to the bottom face of the through-flow groove, of the central axis of the first side face of the reinforcing piece is smaller than the groove depth of the through-flow groove, and the width of the reinforcing piece is smaller than that of the through-flow groove. By applying the stator core, interference between the reinforcing member and the inner diameter of the shell of the compressor can be avoided, the rigidity of the stator core is improved, the deformation of the stator core is reduced, and the iron loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular, to a stator core, a motor using the stator core, a compressor using the motor, and an electrical appliance using the compressor. Background Art

[0002] Permanent magnet synchronous motors have the advantages of high power factor, large starting torque, simple structure, reliable operation, and small size. Therefore, they have been widely used in various industries. In air-conditioning compressors, the stator of the permanent magnet synchronous motor is fixed to the compressor housing by interference fit. The cylindrical error between the stator core and the housing and the difference in cooling speed of the housing surface after the shrink fitting process can easily cause deformation of the stator core, causing the motor to generate high-order harmonics due to the asymmetry of the magnetic circuit during operation, causing electromagnetic noise, increasing iron loss, and reducing motor performance.

[0003] In an existing motor, the stator core is constructed with two spaced flow channels on the outer peripheral wall of the stator yoke that matches the position of the stator teeth, thereby forming a support structure between the two flow channels, and the support structure corresponds to the position of the stator teeth. When the stator core is assembled in the compressor housing, in addition to the part of the stator yoke corresponding to the stator slot 180 degrees opposite the stator teeth having an interference fit with the housing, the part of the stator yoke corresponding to the stator teeth will also have a partial interference fit with the housing. Therefore, this solution can avoid the stator being eccentric with the housing when assembled in the compressor housing, which is conducive to a more uniform force on the stator core, thereby solving the problem that the eccentric fit between the housing and the stator will lead to poor coaxiality between the stator and the rotor, causing asymmetric magnetic circuits, and increased vibration and noise.

[0004] However, in this solution, the height of the support structure is in the same plane as the outer peripheral wall of the stator yoke, which may easily cause the support structure to interfere with the inner diameter of the compressor casing. In addition, the support structure adopts a cubic structure, and the support structure has a poor stress resistance, which in turn affects the stiffness of the stator core.

[0005] Therefore, a more optimized motor structure needs to be considered. Summary of the invention

[0006] The first object of the present invention is to provide a stator core which can avoid interference between a reinforcement member and the inner diameter of a compressor shell, improve the rigidity of the stator core, reduce deformation of the stator core, and reduce iron loss.

[0007] The second object of the present invention is to provide a motor that can avoid interference between the reinforcement and the inner diameter of the compressor shell, improve the rigidity of the stator core, reduce the deformation of the stator core, and reduce the iron loss.

[0008] The third object of the present invention is to provide a compressor that can avoid interference between the reinforcement and the inner diameter of the compressor shell, improve the rigidity of the stator core, reduce the deformation of the stator core, and reduce iron loss.

[0009] The fourth object of the present invention is to provide an electrical appliance that can avoid interference between the reinforcement and the inner diameter of the compressor shell, improve the rigidity of the stator core, reduce the deformation of the stator core, and reduce iron loss.

[0010] In order to achieve the above-mentioned first purpose, the stator core provided by the present invention is provided with a yoke and a plurality of tooth portions, and the plurality of tooth portions are evenly arranged on the radial inner side of the yoke along the circumferential direction of the stator core, and the outer periphery of the yoke corresponding to the tooth portion is provided with a flow groove extending along the axial direction of the stator core, and a reinforcement member extending along the axial direction of the stator core is provided at the radial center axis of the flow groove; the first side surface of the reinforcement member protruding from the bottom surface of the flow groove is arranged in a curved surface, the height of the center axis of the first side surface of the reinforcement member relative to the bottom surface of the flow groove is less than the groove depth of the flow groove, and the width of the reinforcement member is less than the width of the flow groove.

[0011] As can be seen from the above scheme, the stator core of the present invention is provided with a reinforcement piece at the radial center axis of the bottom surface of the through-flow groove, the height of the center axis of the reinforcement piece relative to the bottom surface of the through-flow groove is less than the groove depth of the through-flow groove, and the width of the reinforcement piece is less than the width of the through-flow groove, which can avoid interference between the reinforcement piece and the inner diameter of the compressor shell, and at the same time does not affect the circulation of the refrigeration oil. Moreover, the first side surface of the reinforcement piece protruding from the bottom surface of the through-flow groove is arranged in a curved surface, which can be used to make the reinforcement piece more uniformly stressed, improve the tolerance of the reinforcement piece, and then improve the rigidity of the stator core, reduce the deformation of the stator core, and reduce the iron loss.

[0012] In a further solution, the height of the central axis of the first side surface of the reinforcement relative to the bottom surface of the through-flow groove satisfies the following relationship: 0

[0013] It can be seen that the height of the center axis of the reinforcement member relative to the bottom surface of the through-flow groove satisfies 0

[0014] In a further solution, the width of the reinforcement member and the width of the through-flow groove satisfy the following relationship: 0.25L1<L11<0.5L1; wherein L11 is the width of the reinforcement member, and L1 is the width of the through-flow groove.

[0015] It can be seen that the width of the reinforcement meets 0.25L1<L11<0.5L1, which can optimize the structural setting of the reinforcement and improve the tolerance of the reinforcement.

[0016] ​​In a further scheme, the bottom surface of the flow groove is set as an arc surface; the central angle of the flow groove and the central angle corresponding to the bottom area of ​​the reinforcement located in the flow groove satisfy the following relationship: 1 / 3*α<β<1 / 2*α; wherein α is the central angle of the flow groove, and β is the central angle corresponding to the bottom area of ​​the reinforcement located in the flow groove.

[0017] It can be seen that when the bottom surface of the through-flow groove is set as an arc surface, the central angle of the through-flow groove and the central angle corresponding to the bottom area of ​​the reinforcement member located in the through-flow groove satisfy 1 / 3*α<β<1 / 2*α, which can optimize the structural setting of the reinforcement member and improve the tolerance of the reinforcement member.

[0018] In a further solution, the first side surface is arranged as a quasi-normal distribution surface.

[0019] It can be seen that the first side surface is arranged as a quasi-normal distribution curved surface, which can further optimize the structure of the first side surface and improve the stress resistance.

[0020] In a further solution, the reinforcement piece is welded to the bottom of the throughflow channel.

[0021] It can be seen that the reinforcement piece is fixed to the bottom of the through-flow slot by welding, which can facilitate the modification of the existing stator core.

[0022] In a further solution, along the radial direction of the stator core, a fixing groove is provided on one side of the through-flow groove close to the axis of the stator core, and the reinforcement piece is provided with a fixing portion, which is installed in the fixing groove.

[0023] It can be seen that by providing the fixing groove at the bottom of the through-flow groove and providing the fixing portion on the reinforcing member, the installation of the reinforcing member can be facilitated.

[0024] In a further solution, the fixing groove is an I-shaped groove; the I-shaped groove satisfies the following relationship: W / 10≤H≤W / 4, where f yk is the standard value of the tensile yield strength of the reinforcement, b is the length of the I-shaped groove, t is the width of the I-shaped groove, and W is the thickness of the yoke.

[0025] It can be seen that the fixed groove adopts an I-shaped groove, and the I-shaped groove meets the following requirements: W / 10≤H≤W / 4 can prevent the core from affecting the magnetic density at the connection between the stator yoke and the teeth due to the opening of fixed slots, and prevent the slotting from causing stress concentration and affecting the core stiffness.

[0026] In a further solution, the fixing portion and the fixing groove are interference fit.

[0027] It can be seen from this that the interference fit between the fixing portion and the fixing groove can facilitate the fixing and installation of the fixing portion and the fixing groove, and improve the tightness of the connection between the fixing portion and the fixing groove.

[0028] In a further solution, a plurality of reinforcing ribs are arranged on the first side surface of the reinforcing member, the plurality of reinforcing ribs extend along the length direction of the reinforcing member, and the reinforcing ribs are arranged perpendicular to the length direction of the reinforcing member.

[0029] It can be seen that the reinforcement piece is provided with a plurality of reinforcing ribs, which can increase the strength of the reinforcement piece and reduce the bending deformation of the stator core caused by interference fit.

[0030] In a further solution, the thickness of the reinforcement rib is d satisfying the following relationship: 0.01L≤d≤0.15L; the number of reinforcement ribs satisfies the following relationship: [0.06L]≤n≤[0.1L]; wherein d is the thickness of the reinforcement rib, n is the number of reinforcement ribs, and L is the length of the reinforcement rib.

[0031] It can be seen that by setting the parameters of the thickness and number of the reinforcing ribs, the structure of the reinforcement can be optimized and material can be saved at the same time.

[0032] In order to achieve the above second objective, the motor provided by the present invention includes a stator core, and the stator core adopts the above stator core.

[0033] In order to achieve the third objective, the compressor provided by the present invention includes a motor, and the motor adopts the motor mentioned above.

[0034] In order to achieve the fourth objective, the present invention provides an electrical appliance, including a compressor, wherein the compressor is the above-mentioned compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural diagram of the first embodiment of the stator core of the present invention, viewed from the front along the axial direction of the stator core.

[0036] Figure 2 It is a structural diagram of the stator core in the first embodiment of the present invention, viewed from the front along the axial direction.

[0037] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0038] Figure 4 1 is a structural diagram of a reinforcing member in the first embodiment of the stator core of the present invention.

[0039] Figure 5 It is a structural diagram of the second embodiment of the stator core of the present invention.

[0040] Figure 6 It is a structural diagram of the second embodiment of the stator core of the present invention, viewed from the front along the axial direction of the stator core.

[0041] Figure 7 yes Figure 6 Enlarged view of point B in the middle.

[0042] Figure 8 1 is a structural diagram of a reinforcing member in a second embodiment of a stator core of the present invention.

[0043] Fig. 9 It is a structural diagram of the second embodiment of the stator core of the present invention, viewed from the front along the axial direction of the stator core.

[0044] Fig.10 yes Fig. 9 Enlarged view of point C in the middle.

[0045] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0046] The first embodiment of the stator core:

[0047] like Figure 1 As shown, in this embodiment, the stator core is provided with a yoke 1 and a plurality of teeth 2, and the plurality of teeth 2 are evenly arranged on the radial inner side of the yoke 1 along the circumferential direction of the stator core, and the outer periphery of the yoke 1 corresponding to the teeth 2 is provided with a flow slot 3 extending along the axial direction of the stator core, and a reinforcement 4 extending along the axial direction of the stator core is provided at the radial center axis of the flow slot 3. The first side surface 41 of the reinforcement 4 protruding from the bottom surface of the flow slot 3 is arranged in a curved surface, and the height of the center axis of the first side surface 41 of the reinforcement 4 relative to the bottom surface of the flow slot 3 is less than the groove depth of the flow slot 3, and the width of the reinforcement 4 is less than the width of the flow slot 3. Preferably, the first side surface 41 is arranged in a quasi-normal distribution curved surface. The reinforcement 4 is made of a material with a Rockwell hardness greater than or equal to the Rockwell hardness of the stator core.

[0048] In this embodiment, see Figure 2 and Figure 3 , the height of the center axis of the first side surface 41 of the reinforcement member 4 relative to the bottom surface of the through-flow groove 3 satisfies the following relationship: 0

[0049] ​In this embodiment, the bottom surface of the through-flow groove 3 is set in an arc surface. The central angle of the through-flow groove 3 and the central angle corresponding to the bottom surface area of ​​the reinforcement member 4 located in the through-flow groove 3 satisfy the following relationship: 1 / 3*α<β<1 / 2*α; wherein α is the central angle of the through-flow groove 3, and β is the central angle corresponding to the bottom surface area of ​​the reinforcement member 4 located in the through-flow groove 3. When the bottom surface of the through-flow groove 3 is set in an arc surface, the central angle of the through-flow groove 3 and the central angle corresponding to the bottom surface area of ​​the reinforcement member 4 located in the through-flow groove 3 satisfy 1 / 3*α<β<1 / 2*α, that is, the central angle corresponding to the bottom surface area of ​​the reinforcement member 4 located in the through-flow groove 3 is in the range of one third to one half of the central angle of the through-flow groove 3, which can optimize the structural setting of the reinforcement member 4 and improve the tolerance of the reinforcement member 4.

[0050] In this embodiment, along the radial direction of the stator core, a fixing groove 5 is provided on one side of the through-flow groove 3 close to the axis of the stator core, see Figure 4 , the reinforcement member 4 is provided with a fixing portion 42, and the fixing portion 42 is installed in the fixing groove 5. By providing the fixing groove 5 at the bottom of the through-flow groove 3 and the reinforcement member 4 with the fixing portion 42, the installation of the reinforcement member 4 can be facilitated. The fixing groove 5 can be a T-shaped groove, an I-shaped groove, or a groove whose width gradually increases from the bottom of the through-flow groove 3 to the axial direction of the stator core.

[0051] In this embodiment, the fixing groove 5 is an I-shaped groove. The I-shaped groove satisfies the following relationship: W / 10≤H≤W / 4, where f yk is the standard value of the tensile yield strength of the reinforcement 4, b is the length of the I-shaped slot, t is the width of the I-shaped slot, and W is the thickness of the yoke 1. The fixing slot 5 adopts an I-shaped slot, and the I-shaped slot meets the above dimensions, which can prevent the core from affecting the magnetic density at the connection between the stator yoke 1 and the tooth part 2 due to the opening of the fixing slot 5, and prevent the slot from causing stress concentration and affecting the rigidity of the core. In this embodiment, the fixing part 42 and the fixing slot 5 have an interference fit, which can facilitate the fixing and installation of the fixing part 42 and the fixing slot 5, and improve the tightness of the connection between the fixing part 42 and the fixing slot 5.

[0052] Depend on Figure 4It can be seen that a plurality of reinforcing ribs 43 are arranged on the first side surface 41 of the reinforcing member 4, and the plurality of reinforcing ribs 43 extend along the length direction of the reinforcing member 4, and the reinforcing ribs 43 are arranged perpendicular to the length direction of the reinforcing member 4. The plurality of reinforcing ribs 43 are arranged to increase the endurance of the reinforcing member 4 and reduce the bending deformation of the stator core caused by interference fit. The thickness of the reinforcing rib 43 is d, which satisfies the following relationship: 0.01L≤d≤0.15L; the number of the reinforcing ribs 43 satisfies the following relationship: [0.06L]≤n≤[0.1L]; wherein d is the thickness of the reinforcing rib 43, n is the number of the reinforcing rib 43, L is the length of the reinforcing rib 43, and [*] indicates rounding. For example, when L is 60 mm, [0.06L] is equal to 3. By setting the parameters of the thickness of the reinforcing rib 43 and the number of the reinforcing rib 43, the structure of the reinforcing member 4 can be optimized while saving materials.

[0053] As can be seen from the above, the stator core of the present invention is provided with a reinforcement member 4 at the radial center axis of the bottom surface of the through-flow groove 3, the height of the center axis of the reinforcement member 4 relative to the bottom surface of the through-flow groove 3 is less than the groove depth of the through-flow groove 3, and the width of the reinforcement member 4 is less than the width of the through-flow groove 3, which can avoid the interference between the reinforcement member 4 and the inner diameter of the compressor shell, and does not affect the circulation of the refrigeration oil. Moreover, the first side surface 41 of the reinforcement member 4 protruding from the bottom surface of the through-flow groove 3 is arranged in a curved surface, and the curved surface can be used to make the reinforcement member 4 more uniformly stressed, improve the tolerance of the reinforcement member 4, and then improve the rigidity of the stator core, reduce the deformation of the stator core, and reduce the iron loss.

[0054] The second embodiment of the stator core:

[0055] like Figure 5 , Figure 6 and Figure 7 In this embodiment, the stator core is provided with a yoke 10 and a plurality of teeth 20, and the plurality of teeth 20 are evenly arranged on the radial inner side of the yoke 10 along the circumferential direction of the stator core, and the outer periphery of the yoke 10 corresponding to the teeth 20 is provided with a through-flow groove 30 extending along the axial direction of the stator core, and a reinforcement member 40 extending along the axial direction of the stator core is provided at the radial center axis of the through-flow groove 30. The first side surface 401 of the reinforcement member 40 protruding from the bottom surface of the through-flow groove 30 is arranged in a curved surface, and the height of the center axis of the first side surface 401 of the reinforcement member 40 relative to the bottom surface of the through-flow groove 30 is less than the groove depth of the through-flow groove 30, and the width of the reinforcement member 40 is less than the width of the through-flow groove 30. Preferably, the first side surface 401 is arranged in a quasi-normal distribution curved surface.

[0056] In this embodiment, the height of the center axis of the first side surface 401 of the reinforcement member 40 relative to the bottom surface of the through-flow groove 30 satisfies the following relationship: 0

[0057] In this embodiment, the bottom surface of the through-flow groove 30 is set in an arc surface. The central angle of the through-flow groove 30 and the central angle corresponding to the bottom surface area of ​​the reinforcement member 40 located in the through-flow groove 30 satisfy the following relationship: 1 / 3*α<β<1 / 2*α; wherein α is the central angle of the through-flow groove 30, and β is the central angle corresponding to the bottom surface area of ​​the reinforcement member 40 located in the through-flow groove 30. When the bottom surface of the through-flow groove 30 is set in an arc surface, the central angle of the through-flow groove 30 and the central angle corresponding to the bottom surface area of ​​the reinforcement member 40 located in the through-flow groove 30 satisfy 1 / 3*α<β<1 / 2*α, which can optimize the structural setting of the reinforcement member 40 and improve the tolerance of the reinforcement member 40.

[0058] A plurality of reinforcing ribs 403 are provided on the first side surface 401 of the reinforcing member 40. The plurality of reinforcing ribs 403 extend along the length direction of the reinforcing member 40, and the reinforcing ribs 403 are provided perpendicular to the length direction of the reinforcing member 40. The plurality of reinforcing ribs 403 can increase the endurance of the reinforcing member 40 and reduce the bending deformation of the stator core caused by interference fit. The thickness d of the reinforcing rib 403 satisfies the following relationship: 0.01L≤d≤0.15L; the number of the reinforcing ribs 403 satisfies the following relationship: [0.06L]≤n≤[0.1L]; wherein d is the thickness of the reinforcing rib 403, n is the number of the reinforcing rib 403, and L is the length of the reinforcing rib 403. By setting the parameters of the thickness of the reinforcing rib 403 and the number of the reinforcing rib 403, the structure of the reinforcing member 40 can be optimized while saving materials.

[0059] In addition, in this embodiment, the reinforcement member 40 is welded to the bottom of the through-flow slot 30. The reinforcement member 40 is fixed to the bottom of the through-flow slot 30 by welding, which can facilitate the modification of the existing stator core. The bottom surface 402 of the reinforcement member 40 is arranged in an arc surface, and the bottom surface 402 of the reinforcement member 40 and the bottom surface of the through-flow slot 30 are concentric arc surfaces.

[0060] The third embodiment of the stator core:

[0061] like Fig. 9 and Fig.10 ​As shown, in this embodiment, the stator core is provided with a yoke 100 and a plurality of teeth 200, and the plurality of teeth 200 are evenly arranged on the radial inner side of the yoke 100 along the circumferential direction of the stator core, and the outer periphery of the yoke 100 corresponding to the teeth 200 is provided with a through-flow groove 300 extending along the axial direction of the stator core, and a reinforcement member 400 extending along the axial direction of the stator core is provided at the radial center axis of the through-flow groove 300. The first side surface 4001 of the reinforcement member 400 protruding from the bottom surface of the through-flow groove 300 is arranged in a curved surface, and the height of the central axis of the first side surface 4001 of the reinforcement member 400 relative to the bottom surface of the through-flow groove 300 is less than the groove depth of the through-flow groove 300, and the width of the reinforcement member 400 is less than the width of the through-flow groove 300. Preferably, the first side surface 4001 is arranged in a quasi-normal distribution curved surface.

[0062] In this embodiment, the bottom surface of the through-flow groove 300 is arranged in a plane. The height of the center axis of the first side surface 4001 of the reinforcement member 400 relative to the bottom surface of the through-flow groove 300 satisfies the following relationship: 0

[0063] In this embodiment, the width of the reinforcement 400 and the width of the through-flow slot 300 satisfy the following relationship: 0.25L1<L11<0.5L1; wherein L11 is the width of the reinforcement 400, and L1 is the width of the through-flow slot 300. The width of the reinforcement 400 satisfies the above relationship, which can optimize the structural setting of the reinforcement 400 and improve the tolerance of the reinforcement 400. The reinforcement 400 is welded to the bottom of the through-flow slot 300. The reinforcement 400 is fixed to the bottom of the through-flow slot 300 by welding, which can facilitate the modification of the existing stator core.

[0064] Of course, the reinforcement member 400 may also be provided with reinforcing ribs as in the first embodiment or the second embodiment. The specific dimensions of the reinforcing ribs refer to the first embodiment or the second embodiment and will not be described in detail here.

[0065] Motor embodiment:

[0066] In this embodiment, the motor includes a stator core, and the stator core adopts the stator core in the above embodiment.

[0067] Compressor Example:

[0068] In this embodiment, the compressor includes a motor, and the motor is the motor of the above embodiment.

[0069] Electrical appliance embodiment:

[0070] ​In this embodiment, the electrical appliance includes a compressor, and the compressor adopts the compressor of the above embodiment. The electrical appliance may be a refrigerator, an air conditioner, an air purifier, or other electrical appliances that require a compressor.

[0071] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto, and any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A stator core, comprising a yoke and a plurality of teeth, wherein the plurality of teeth are evenly arranged on the radial inner side of the yoke along the circumferential direction of the stator core, the outer periphery of the yoke corresponding to the teeth is provided with a through-flow groove extending along the axial direction of the stator core, and a reinforcing member extending along the axial direction of the stator core is provided at the radial center axis of the through-flow groove; characterized in that: The first side surface of the reinforcement protruding from the bottom surface of the through-flow groove is arranged in a curved surface, the height of the center axis of the first side surface of the reinforcement relative to the bottom surface of the through-flow groove is smaller than the groove depth of the through-flow groove, and the width of the reinforcement is smaller than the width of the through-flow groove.

2. The stator core according to claim 1, characterized in that: The height h1 of the center axis of the first side surface of the reinforcement relative to the bottom surface of the through-flow groove satisfies the following relationship: 0<h1≤0.3h; Wherein, h is the groove depth of the through-flow groove.

3. The stator core according to claim 1, characterized in that: The width of the reinforcement member and the width of the through-flow groove satisfy the following relationship: 0.25L1<L11<0.5L1; Wherein, L11 is the width of the reinforcement member, and L1 is the width of the through-flow groove.

4. The stator core according to claim 1, characterized in that: The bottom surface of the through-flow groove is arranged in an arc shape; The central angle of the through-flow groove and the central angle of the reinforcement member corresponding to the bottom surface area of ​​the through-flow groove satisfy the following relationship: 1 / 3*α＜β＜1 / 2*α； Wherein, α is the center angle of the through-flow groove, and β is the center angle corresponding to the bottom area of ​​the reinforcement member located in the through-flow groove.

5. The stator core according to claim 1, characterized in that: The first side surface is arranged in a quasi-normal distribution curved surface.

6. The stator core according to claim 1, characterized in that: The reinforcement member is welded to the bottom of the through-flow channel.

7. The stator core according to claim 1, characterized in that: In the radial direction of the stator core, a fixing groove is provided on one side of the through-flow groove close to the axis of the stator core, and the reinforcement member is provided with a fixing portion, which is installed in the fixing groove.

8. The stator core according to claim 7, characterized in that: The fixing groove is an I-shaped groove; The I-shaped groove satisfies the following relationship: W / 10≤H≤W / 4, Among them, f yk is the standard value of the tensile yield strength of the reinforcement, b is the length of the I-shaped groove, t is the width of the I-shaped groove, and W is the thickness of the yoke.

9. The stator core according to claim 7, characterized in that: The fixing portion is interference fit with the fixing groove.

10. The stator core according to claims 1 to 9, characterized in that: A plurality of reinforcing ribs are arranged on the first side surface of the reinforcing member, the plurality of reinforcing ribs extend along the length direction of the reinforcing member, and the reinforcing ribs are arranged perpendicular to the length direction of the reinforcing member.

11. The stator core according to claim 10, characterized in that: The thickness of the reinforcing rib satisfies the following relationship: 0.01L≤d≤0.15L; The number of the reinforcing ribs satisfies the following relationship: [0.06L]≤n≤[0.1L]; Wherein, d is the thickness of the reinforcing rib, n is the number of the reinforcing ribs, and L is the length of the reinforcing rib.

12. A motor, comprising a stator core, characterized in that: The stator core adopts the stator core according to any one of claims 1 to 11.

13. A compressor, comprising a motor, characterized in that: The motor is the motor according to claim 12.

14. An electrical appliance, comprising a compressor, characterized in that: The compressor is the compressor according to claim 13.

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