CN112564324B - Stator core, stator, motor, compressor and refrigeration plant - Google Patents
Stator core, stator, motor, compressor and refrigeration plant Download PDFInfo
- Publication number
- CN112564324B CN112564324B CN202011581681.7A CN202011581681A CN112564324B CN 112564324 B CN112564324 B CN 112564324B CN 202011581681 A CN202011581681 A CN 202011581681A CN 112564324 B CN112564324 B CN 112564324B
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- stator
- stator core
- holding portion
- outer edge
- yoke
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to the technical field of motors, in particular to a stator core, a stator, a motor, a compressor and refrigeration equipment. The stator core comprises a body and a retainer, the body comprises a yoke part and a plurality of stator teeth, a stator slot is defined between every two adjacent stator teeth and the yoke part, the body is provided with a first end surface and a second end surface which are opposite in the axial direction of the stator core, the outer edge of the yoke part is provided with an installation groove, and the installation groove penetrates through the yoke part along the axial direction of the stator core; the holder comprises a first holding part, a second holding part and a third holding part, wherein the first holding part is arranged on the first end surface, and the second holding part is arranged on the second end surface; at least one part of the third holding part is arranged in the mounting groove, and two ends of the third holding part are respectively connected with the first holding part and the second holding part. By using the stator core of the embodiment of the invention, the vibration noise of the motor comprising the stator core can be reduced, and the efficiency of the motor comprising the stator core can be improved.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a stator core, a stator, a motor, a compressor and refrigeration equipment.
Background
In the related art, the motor of the rotary compressor generally adopts the interior permanent magnet motor, and in recent years, with the improvement of the power density of the motor, higher requirements are provided for the vibration noise of the motor, while the prior motor cannot meet the requirement of silence more and more.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
at present, a stator core of a motor is compressed by stator punching sheets and various fasteners to form a whole, for example, the stator punching sheets are connected in an axial direction by rivets. The vibration noise generated by the motor has the following reasons:
1. because the rigidity of connection between each stator punching is low, lead to stator core's rigidity low, and then lead to the motor operation including the stator to produce great vibration noise.
2. When electromagnetic force acts on the tooth shoes of the stator core, the electromagnetic force is transmitted outward along the tooth shoes, the tooth portions, and the yoke portion of the stator core, causing deformation of the outer edge of the stator core, which also causes a large noise radiation during operation of the motor including the stator.
3. In the manufacturing process of the stator, for example, when the stator is in interference fit with a shell of a compressor, assembly stress can be generated, on one hand, the assembly stress is transmitted inwards to cause the deformation of the inner diameter of a stator core, and cause the uneven clearance between the stator and a rotor of the motor, and finally cause the deterioration of vibration noise of the motor comprising the stator during operation; on the other hand, assembly stress increases core loss of the stator, eventually leading to a decrease in efficiency of a motor including the stator.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
To this end, an aspect of the present invention provides a stator core to reduce vibration noise of a motor including the stator core, and to improve efficiency of the motor including the stator core.
Another aspect of the present invention provides a stator to reduce vibration noise of a motor including the stator, and to improve efficiency of the motor including the stator.
Still another aspect of the present invention provides a motor to reduce vibration noise of the motor and improve efficiency of the motor.
Still another aspect of the present invention provides a compressor to reduce vibration noise of the compressor and to improve efficiency of the compressor.
Still another aspect of the present invention provides a refrigerating apparatus to reduce vibration noise of the refrigerating apparatus and to improve efficiency of the refrigerating apparatus.
A stator core according to an embodiment of the present invention includes:
the stator core comprises a body and a plurality of stator teeth, wherein a stator slot is defined between every two adjacent stator teeth and the yoke, the body is provided with a first end surface and a second end surface which are opposite in the axial direction of the stator core, the outer edge of the yoke is provided with a mounting groove, and the mounting groove penetrates through the yoke along the axial direction of the stator core; and
a holder, the holder comprising:
a first holding portion provided on the first end face and a second holding portion provided on the second end face; and
a third holding portion, at least a portion of which is provided in the mounting groove, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion.
By using the stator core according to the embodiment of the invention, the vibration noise of the motor comprising the stator core can be reduced, and the efficiency of the motor comprising the stator core can be improved.
In some embodiments, the mounting grooves are plural, the mounting grooves are arranged at intervals in the circumferential direction of the stator core, the third retaining portions are plural, and the third retaining portions are arranged in the mounting grooves in a one-to-one correspondence.
In some embodiments, the plurality of mounting grooves are opposed to the plurality of stator teeth one by one in the inward and outward direction, and the plurality of third retaining portions are opposed to the plurality of stator teeth one by one in the inward and outward direction.
In some embodiments, an extending direction of each of the mounting grooves is parallel to an axial direction of the stator core.
In some embodiments, an outer edge of the first holding portion is located inside an outer edge of the yoke portion, an outer edge of the second holding portion is located inside an outer edge of the yoke portion, and an outer edge of the third holding portion is located inside an outer edge of the yoke portion.
In some embodiments, the retainer is integrally injection molded.
A stator according to an embodiment of the present invention includes a stator core including:
the stator core comprises a body and a plurality of stator teeth, wherein a stator slot is defined between every two adjacent stator teeth and the yoke, the body is provided with a first end surface and a second end surface which are opposite in the axial direction of the stator core, the outer edge of the yoke is provided with a mounting groove, and the mounting groove penetrates through the yoke along the axial direction of the stator core; and
a holder, the holder comprising:
a first holding portion provided on the first end face and a second holding portion provided on the second end face; and
a third holding portion, at least a part of which is provided in the mounting groove, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion;
the stator winding is wound on the stator teeth of the stator core and comprises a first part, a second part and a third part, the first part and the second part are located outside a stator slot of the stator core, and the third part is located inside the stator slot.
By using the stator according to the embodiment of the invention, the vibration noise of the motor comprising the stator can be reduced, and the efficiency of the motor comprising the stator can be improved.
In some embodiments, the mounting grooves are plural, the mounting grooves are arranged at intervals in the circumferential direction of the stator core, the third retaining portions are plural, and the third retaining portions are arranged in the mounting grooves in a one-to-one correspondence.
In some embodiments, the plurality of mounting grooves are opposed to the plurality of stator teeth one by one in the inward and outward direction, and the plurality of third retaining portions are opposed to the plurality of stator teeth one by one in the inward and outward direction.
In some embodiments, an extending direction of each of the mounting grooves is parallel to an axial direction of the stator core.
In some embodiments, an outer edge of the first holding portion is located inside an outer edge of the yoke portion, an outer edge of the second holding portion is located inside an outer edge of the yoke portion, and an outer edge of the third holding portion is located inside an outer edge of the yoke portion.
In some embodiments, the retainer is integrally injection molded.
In some embodiments, the first retainer covers at least a portion of the first portion and the second retainer covers at least a portion of the second portion.
A motor according to an embodiment of the present invention includes a stator including a stator core including:
the stator core comprises a body and a plurality of stator teeth, wherein a stator slot is defined between every two adjacent stator teeth and the yoke, the body is provided with a first end surface and a second end surface which are opposite in the axial direction of the stator core, the outer edge of the yoke is provided with a mounting groove, and the mounting groove penetrates through the yoke along the axial direction of the stator core; and
a holder, the holder comprising:
a first holding portion provided on the first end face and a second holding portion provided on the second end face; and
a third holding portion, at least a part of which is provided in the mounting groove, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion;
the stator winding is wound on the stator teeth of the stator core and comprises a first part, a second part and a third part, the first part and the second part are located outside a stator slot of the stator core, and the third part is located inside the stator slot.
The motor provided by the embodiment of the invention has the advantages of low vibration noise, high efficiency and the like.
In some embodiments, the mounting grooves are plural, the mounting grooves are arranged at intervals in the circumferential direction of the stator core, the third retaining portions are plural, and the third retaining portions are arranged in the mounting grooves in a one-to-one correspondence.
In some embodiments, the plurality of mounting grooves are opposed to the plurality of stator teeth one by one in the inward and outward direction, and the plurality of third retaining portions are opposed to the plurality of stator teeth one by one in the inward and outward direction.
In some embodiments, an extending direction of each of the mounting grooves is parallel to an axial direction of the stator core.
In some embodiments, an outer edge of the first holding portion is located inside an outer edge of the yoke portion, an outer edge of the second holding portion is located inside an outer edge of the yoke portion, and an outer edge of the third holding portion is located inside an outer edge of the yoke portion.
In some embodiments, the retainer is integrally injection molded.
In some embodiments, the first retainer covers at least a portion of the first portion and the second retainer covers at least a portion of the second portion.
A compressor according to an embodiment of the present invention includes a motor including a stator core, the stator core including:
the stator core comprises a body and a plurality of stator teeth, wherein a stator slot is defined between every two adjacent stator teeth and the yoke, the body is provided with a first end surface and a second end surface which are opposite in the axial direction of the stator core, the outer edge of the yoke is provided with a mounting groove, and the mounting groove penetrates through the yoke along the axial direction of the stator core; and
a holder, the holder comprising:
a first holding portion provided on the first end face and a second holding portion provided on the second end face; and
a third holding portion, at least a part of which is provided in the mounting groove, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion;
the stator winding is wound on the stator teeth of the stator core and comprises a first part, a second part and a third part, the first part and the second part are located outside a stator slot of the stator core, and the third part is located inside the stator slot.
The compressor provided by the embodiment of the invention has the advantages of low vibration noise, high efficiency and the like.
In some embodiments, the mounting grooves are plural, the mounting grooves are arranged at intervals in the circumferential direction of the stator core, the third retaining portions are plural, and the third retaining portions are arranged in the mounting grooves in a one-to-one correspondence.
In some embodiments, the plurality of mounting grooves are opposed to the plurality of stator teeth one by one in the inward and outward direction, and the plurality of third retaining portions are opposed to the plurality of stator teeth one by one in the inward and outward direction.
In some embodiments, an extending direction of each of the mounting grooves is parallel to an axial direction of the stator core.
In some embodiments, an outer edge of the first holding portion is located inside an outer edge of the yoke portion, an outer edge of the second holding portion is located inside an outer edge of the yoke portion, and an outer edge of the third holding portion is located inside an outer edge of the yoke portion.
In some embodiments, the retainer is integrally injection molded.
In some embodiments, the first retainer covers at least a portion of the first portion and the second retainer covers at least a portion of the second portion.
According to the refrigeration equipment of the embodiment of the invention, the refrigeration equipment comprises a compressor, the compressor comprises a motor, the motor comprises a stator, the stator comprises a stator core, and the stator core comprises:
the stator core comprises a body and a plurality of stator teeth, wherein a stator slot is defined between every two adjacent stator teeth and the yoke, the body is provided with a first end surface and a second end surface which are opposite in the axial direction of the stator core, the outer edge of the yoke is provided with a mounting groove, and the mounting groove penetrates through the yoke along the axial direction of the stator core; and
a holder, the holder comprising:
a first holding portion provided on the first end face and a second holding portion provided on the second end face; and
a third holding portion, at least a part of which is provided in the mounting groove, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion;
the stator winding is wound on the stator teeth of the stator core and comprises a first part, a second part and a third part, the first part and the second part are located outside a stator slot of the stator core, and the third part is located inside the stator slot.
The refrigeration equipment provided by the embodiment of the invention has the advantages of low vibration noise, high efficiency and the like.
In some embodiments, the mounting grooves are plural, the mounting grooves are arranged at intervals in the circumferential direction of the stator core, the third retaining portions are plural, and the third retaining portions are arranged in the mounting grooves in a one-to-one correspondence.
In some embodiments, the plurality of mounting grooves are opposed to the plurality of stator teeth one by one in the inward and outward direction, and the plurality of third retaining portions are opposed to the plurality of stator teeth one by one in the inward and outward direction.
In some embodiments, an extending direction of each of the mounting grooves is parallel to an axial direction of the stator core.
In some embodiments, an outer edge of the first holding portion is located inside an outer edge of the yoke portion, an outer edge of the second holding portion is located inside an outer edge of the yoke portion, and an outer edge of the third holding portion is located inside an outer edge of the yoke portion.
In some embodiments, the retainer is integrally injection molded.
In some embodiments, the first retainer covers at least a portion of the first portion and the second retainer covers at least a portion of the second portion.
Drawings
Fig. 1 is a schematic structural view of a stator according to an embodiment of the present invention (a holder is not shown).
Fig. 2 is a perspective view of a stator core according to one embodiment of the present invention.
Fig. 3 is a top view of a stator core according to one embodiment of the present invention.
Fig. 4 is a schematic structural view of a stator according to an embodiment of the present invention.
Fig. 5 is a structural schematic view from another perspective of a stator core according to one embodiment of the present invention (the holder is not shown).
Fig. 6 is a schematic structural view of a compressor according to an embodiment of the present invention.
Reference numerals: a stator 1; a stator core 10; a body 110; mounting grooves 1103; a yoke 101; an outer edge 1011; stator teeth 102; a tooth 1021; tooth shoes 1022; a stator slot 103; first end face 104 (1101); second end face 105 (1102); a stator winding 20; a first portion 201; a second portion 202; a third portion 203; a holder 30; a first holding portion 301; an outer edge 3011; a second holding portion 302; an outer rim 3021; a third holding portion 303; a first end portion 3031; a second end portion 3032; a fourth holding portion 304; a first end 3041; a second end 3042; a compressor 100; a motor 1000; a housing 1001; a rotor 1002; a crankshaft 1003; a main bearing 1004; a cylinder 1005; a piston 1006; the sub-bearing 1007.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 5, a stator core 10 according to an embodiment of the present invention includes a body 110 and a holder 30, the body 110 includes a yoke portion 101 and a plurality of stator teeth 102, adjacent two stator teeth 102 and the yoke portion 101 define a stator slot 103 therebetween, and the body 110 has a first end surface 104 and a second end surface 105 that are opposite in an axial direction thereof. An attachment groove 1103 is provided on an outer edge 1011 of the yoke 101, and the attachment groove 1103 penetrates the yoke 101 in the axial direction of the stator core 10.
The holder 30 includes a first holding portion 301, a second holding portion 302, and a third holding portion 303, the first holding portion 301 being provided on the first end face 104, the second holding portion 302 being provided on the second end face 105. At least a part of the third holding portion 303 is provided in the mounting groove 1103, the third holding portion 303 has a first end portion 3031 and a second end portion 3032 opposite in the axial direction of the stator core 10, the first end portion 3031 of the third holding portion 303 is connected to the first holding portion 301, and the second end portion 3032 of the third holding portion 303 is connected to the second holding portion 302.
In the prior art, a stator core is formed by compressing stator laminations and various fasteners into a whole, for example, the stator laminations are connected in an axial direction by rivets. Firstly, the rigidity of the stator core is low due to the low connection rigidity between the stator punching sheets, and further, a motor including the stator generates large vibration noise when running. Secondly, when electromagnetic force acts on the tooth shoes of the stator core, the electromagnetic force is transmitted outward along the tooth shoes, the tooth portions, and the yoke portion of the stator core, causing deformation of the outer edge of the stator core, which also causes large noise radiation during operation of the motor including the stator. Finally, assembly stress can be generated during the manufacturing process of the stator, for example, when the stator is in interference fit with a shell of a compressor, on one hand, the assembly stress is transmitted inwards to cause the deformation of the inner diameter of a stator core, and cause the non-uniformity of a gap between the stator and a rotor of the motor, and finally cause the deterioration of vibration noise of the motor comprising the stator during operation; on the other hand, assembly stress increases core loss of the stator, eventually leading to a decrease in efficiency of a motor including the stator.
The stator core 10 according to the embodiment of the present invention is configured such that the first holding portion 301 and the second holding portion 302 are connected by the third holding portion 303 so that the holder 30 is integrated by providing the first holding portion 301 on the first end face 104 of the body 110 and providing the second holding portion 302 on the second end face 105. Therefore, the plurality of stator laminations of the stator core 10 can be clamped (pressed) in the axial direction of the stator core 10 by the first holding portion 301 and the second holding portion 302, so that the connection rigidity of the plurality of stator laminations of the stator core 10 can be remarkably improved, and the rigidity of the stator core 10 can be remarkably improved.
Thus, not only vibration noise generated due to low connection rigidity of the plurality of stator segments of the stator core 10, but also noise radiation generated due to deformation of the yoke portion 101 by electromagnetic force (e.g., deformation of the outer circumferential surface of the stator core 10) and vibration noise generated due to deformation caused by assembling the stator 1 (e.g., deformation of the inner diameter of the stator core 10, i.e., deformation of the inner circumferential surface of the stator core 10) can be significantly reduced or even eliminated.
Furthermore, by significantly improving the rigidity of the stator core 10, the deformation of the stator core 10 can be significantly reduced or even eliminated, and thus the stress core loss due to the deformation of the stator core 10 can be significantly reduced or even eliminated, so that the efficiency of the motor including the stator core 10 can be significantly improved.
Therefore, by using the stator core 10 according to the embodiment of the present invention, it is possible to reduce vibration noise of the motor including the stator core 10 and improve efficiency of the motor including the stator core 10.
As shown in fig. 1 to 5, a stator 1 according to an embodiment of the present invention includes a stator core 10, a stator winding 20, and a holder 30.
The stator core 10 includes a body 110, and the body 110 includes a yoke portion 101 and a plurality of stator teeth 102. The outer edge 1011 of the yoke 101 is provided with a mounting groove 1103. In other words, the mounting groove 1103 is provided on the outer peripheral surface of the yoke 101. Each stator tooth 102 includes a tooth portion 1021 and a tooth shoe portion 1022. The first end face 104 and the second end face 105 of the stator core 10 are end faces of the body 110 that are opposite in the axial direction of the stator core 10. That is, the body 110 has a first end face 1101 and a second end face 1102 that are opposed in the axial direction of the stator core 10. The first end 1101 of the body 110 is the first end 104 of the stator core 10, and the second end 1102 of the body 110 is the second end 105 of the stator core 10. The axial direction of the stator core 10 is indicated by an arrow a in fig. 1.
Alternatively, a plurality of stator teeth 102 are provided on the yoke portion 101 at intervals in the circumferential direction of the stator core 10. A stator slot 103 is defined between two adjacent stator teeth 102 and the yoke 101, i.e., the stator core 10 has a plurality of stator slots 103.
The stator winding 20 is wound on the stator teeth 102, and the stator winding 20 includes a first portion 201, a second portion 202, and a third portion 203. Wherein the first portion 201 and the second portion 202 are located outside the stator slot 103 and the third portion 203 is located inside the stator slot 103. For example, the first portion 201 protrudes upward out of the stator slot 103, the second portion 202 protrudes downward out of the stator slot 103, the first end face 104 is an upper surface of the stator core 10 (the body 110), the second end face 105 is a lower surface of the stator core 10 (the body 110), and an axial direction of the stator core 10 coincides with an up-down direction. The up-down direction is shown by arrow B in fig. 2.
As shown in fig. 4 and 5, the holder 30 includes a first holding portion 301, a second holding portion 302, and a third holding portion 303, the first holding portion 301 being provided on the first end face 104, and the second holding portion 302 being provided on the second end face 105. The third holding portion 303 has a first end portion 3031 and a second end portion 3032 opposite in the axial direction of the stator core 10, the first end portion 3031 of the third holding portion 303 is connected to the first holding portion 301, and the second end portion 3032 of the third holding portion 303 is connected to the second holding portion 302.
For example, the first holding portion 301 is located above the second holding portion 302, the first holding portion 301 is provided on the upper end surface of the stator core 10, and the second holding portion 302 is provided on the lower end surface of the stator core 10. The upper end of the third holding portion 303 is connected to the first holding portion 301, and the lower end of the third holding portion 303 is connected to the second holding portion 302.
The stator 1 according to the embodiment of the present invention includes the stator core 10 according to the above-described embodiment of the present invention. Therefore, by using the stator 1 according to the embodiment of the present invention, it is possible to reduce vibration noise of the motor including the stator 1 and improve efficiency of the motor including the stator 1.
In some embodiments, the retainer 30 is integrally injection molded, i.e., the first retainer portion 301, the second retainer portion 302, and the third retainer portion are integrally injection molded. The integral injection molding of the retainer 30 is beneficial to further improving the connection rigidity of the plurality of stator laminations of the stator core 10, thereby improving the rigidity of the stator core 10. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved.
Since the resin material is mixed by an optimum compounding ratio of the specific material, it is possible to achieve a more desirable material rigidity and injection flow effect, and therefore, it is preferable that the holder 30 is a resin material.
Specifically, the stator core 10 may be formed by stacking a plurality of stator laminations, then integrally injection-molding the holder 30 on the stator core 10, and finally winding the stator winding 20 around the stator core 10.
As shown in fig. 3 and 5, in some embodiments, the mounting groove 1103 is plural, the plural mounting grooves 1103 are arranged at intervals in the circumferential direction of the stator core 10, the plural third holding portions 303 are plural, and the plural third holding portions 303 are arranged in the plural mounting grooves 1103 in one-to-one correspondence. That is, the number of the third holding portions 303 is equal to the number of the mounting grooves 1103, and one third holding portion 303 is provided in each mounting groove 1103.
The plurality of mounting grooves 1103 are provided so that the first holding portion 301 and the second holding portion 302 are connected by the plurality of third holding portions 303, and thus the plurality of stator laminations of the stator core 10 can be sandwiched better in the axial direction of the stator core 10 by the first holding portion 301 and the second holding portion 302, and the connection rigidity of the plurality of stator laminations of the stator core 10 can be significantly improved, and the rigidity of the stator core 10 can be significantly improved. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved.
As shown in fig. 1 to 5, in some embodiments, the plurality of mounting grooves 1103 are opposed to the plurality of stator teeth 102 one by one in the inward and outward direction, and the plurality of third retaining portions 303 are opposed to the plurality of stator teeth 102 one by one in the inward and outward direction.
In this way, the number of the third holding portions 303 can be further increased, so that more third holding portions 303 are connected to the first holding portion 301 and the second holding portion 302, and thus the plurality of stator laminations of the stator core 10 can be effectively clamped in the axial direction of the stator core 10 by the first holding portion 301 and the second holding portion 302, so that the connection rigidity of the plurality of stator laminations of the stator core 10 can be further remarkably improved, and the rigidity of the stator core 10 can be further remarkably improved. Thereby, not only the vibration noise generated due to the low rigidity of the stator core 10, but also the vibration noise generated due to the deformation of the stator core 10 can be significantly reduced or even eliminated, and also the stress iron loss generated due to the deformation of the stator core 10 can be significantly reduced or even eliminated, so that the efficiency of the motor including the stator 1 can be significantly improved.
For example, nine stator teeth 102 are provided in the stator core 10 shown in fig. 5, nine mounting grooves 1103 and nine third holding portions 303 are provided, nine mounting grooves 1103 are opposed to nine stator teeth 102 one by one in the inward and outward direction, and nine third holding portions 303 are opposed to nine stator teeth 102 one by one in the inward and outward direction.
The sectional shape of the mounting groove 1103 in a plane perpendicular to the axial direction of the stator core 10 may be rectangular or semicircular. In other words, the shape of the cross section of the mounting groove 1103 may be rectangular or semicircular.
As shown in fig. 1 to 5, in some embodiments, the extending direction of the mounting groove 1103 is parallel to the axial direction of the stator core 10, in other words, the extending direction of the mounting groove 1103 is the same as the axial direction of the stator core 10, which facilitates the design and processing of the mounting groove 1103.
In some embodiments, the outer edge 3011 of the first retaining portion 301 is located inside the outer edge 1011 (outer edge) of the yoke portion 101, and the outer edge 3021 of the second retaining portion 302 is located inside the outer edge 1011 (outer edge) of the yoke portion 101. When the stator 1 is assembled with the shell of the compressor, the outer edge 1011 of the yoke 101 of the stator core 10 is in contact with the shell of the compressor, so that the outer edge 3011 of the first holding part 301 is positioned inside the outer edge 1011 of the yoke 101, and the outer edge 3021 of the second holding part 302 is positioned inside the outer edge 1011 of the yoke 101, when the stator 1 is assembled with the shell of the compressor, the outer edge 3011 of the first holding part 301 and the outer edge 3021 of the second holding part 302 are prevented from being in direct contact with the shell of the compressor, and therefore, the situation that the retainer 30 is cracked and generates powder scraps during assembly, the pump body of the compressor is locked, faults occur and the refrigeration effect of the compressor is affected is avoided.
Here, inward refers to a direction adjacent to the central axis of the stator core 10 on a plane perpendicular to the axial direction of the stator core 10, and outward refers to a direction away from the central axis of the stator core 10 on a plane perpendicular to the axial direction of the stator core 10. The inward and outward directions are indicated by arrows C in fig. 3. When the stator 1 is assembled with the rotor, the inner edge is adjacent to the rotor with respect to the outer edge.
In some embodiments, as shown in fig. 4 and 5, the holder 30 further includes a plurality of fourth holding portions 304, at least a portion of the plurality of fourth holding portions 304 being disposed in the plurality of stator slots 103 in a one-to-one correspondence, wherein each of the fourth holding portions 304 has a first end 3041 and a second end 3042 opposite in the axial direction of the stator core 10, the first end 3041 of each of the fourth holding portions 304 is connected to the first holding portion 301, and the second end 3042 of each of the fourth holding portions 304 is connected to the second holding portion 302.
On the basis that the third holding portion 303 is connected to the first holding portion 301 and the second holding portion 302, the fourth holding portion 304 is connected to the first holding portion 301 and the second holding portion 302, which is beneficial to better clamping the plurality of stator laminations of the stator core 10 by the first holding portion 301 and the second holding portion 302 along the axial direction of the stator core 10, so that the connection rigidity of the plurality of stator laminations of the stator core 10 can be remarkably improved, and the rigidity of the stator core 10 is further remarkably improved. Thereby, not only the vibration noise generated due to the low rigidity of the stator core 10, but also the vibration noise generated due to the deformation of the stator core 10 can be significantly reduced or even eliminated, and also the stress iron loss generated due to the deformation of the stator core 10 can be significantly reduced or even eliminated, so that the efficiency of the motor including the stator 1 can be significantly improved. Further, when the holder 30 is integrally injection molded, the fourth holding portion 304 is provided in the stator slot 104, and the difficulty of injection molding of the holder 30 can be reduced.
As shown in fig. 4 and 5, optionally, the fourth holding portion 304 covers at least a portion of the third portion 203 of the stator winding 20. In this way, the thickness of the fourth holding portion 304 can be increased in the inward and outward directions, and the rigidity of the stator core 10 can be improved. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved.
It will be understood by those skilled in the art that when the first holding portion 301 covers the first portion 201, the second holding portion 302 covers the second portion 202, or the fourth holding portion 304 covers the third portion 203, a plurality of stator punching sheets of the stator core 10 may be laminated together, then the stator winding 20 is wound on the stator core 10, and finally the holding member 30 is integrally injection-molded on the stator core 10 and the stator winding 20.
As shown in fig. 6, the present invention also provides a motor 1000. The motor 1000 according to an embodiment of the present invention includes the stator 1 according to the above-described embodiment of the present invention. Therefore, the motor 1000 according to the embodiment of the present invention has the advantages of low vibration noise, high efficiency, and the like.
Those skilled in the art will appreciate that the motor 1000 according to an embodiment of the present invention further includes a rotor 1002. With the number of stator slots 104 of the stator 1 being Z, the pole pair number of the rotor 1002 being P, the ratio of Z to 2P is equal to 3/2 or 6/5 or 6/7. The proportional relation between the number Z of the stator slots 104 and the number P of the pole pairs of the rotor is defined, and then the pole slot matching of the motor 1000 is defined, wherein when the number P of the pole pairs of the rotor 1002 is defined, then the number of the pole pairs of the rotor 1002 is 2P, that is, the motor 1000 can be a 6-pole 9-slot motor, a 4-pole 6-slot motor, an 8-pole 12-slot motor, a 10-pole 12-slot motor, and the motor 1000 of the above type can effectively reduce armature iron loss, promote magnetic flux, and further promote the efficiency of the motor 1000.
Preferably, the inner diameter of the stator core 10 is Di, the rated torque of the motor 1000 is T, and the unit volume torque of the rotor 1002 is TPV, which satisfy the following relation: t × Di of 5.18 × 10-7 ≤-3×TPV-1≤1.17×10-6，5kN·m·m-3≤TPV≤45kN·m·m-3(ii) a The rated torque T of the motor 1000 is expressed in N · m, the inner diameter Di of the stator core 10 is expressed in mm, and the unit volume torque TPV of the rotor 1002 is expressed in kN · m ″-3。
In this embodiment, the rated torque of the motor 1000 is T, the inner diameter of the stator core 10 is Di, and the torque per unit volume of the rotor 1002 is TPV, and satisfies the condition that T × Di is not less than 5.18 × 10-7-3×TPV-1≤1.17×10-6The value range of the unit volume torque TPV is 5 kN.m.m-3≤TPV≤45kN·m·m-3The value range of the combined variables of the rated torque T of the motor 1000, the inner diameter Di of the stator core 10 and the unit volume torque TPV of the rotor 1002 is limited, so that the motor 1000 can meet the power requirement of the compressor, and in addition, the motor 1000 and the compressor 100 adopting the rotor 1002 can effectively reduce the magnetic leakage of the rotor 1002, increase the utilization rate of the permanent magnet and improve the efficiency of the motor 1000.
Preferably, a side of the plurality of tooth shoes 103 facing the rotor encloses an inner circumferential surface of the stator 1, and a ratio of a diameter of the inner circumferential surface of the stator 1 to a diameter of an outer edge of the stator core 10 is greater than 0.5 and equal to or less than 0.58.
In this embodiment, the ratio of the diameter of the inner peripheral surface of the stator 1 to the diameter of the outer edge of the stator core 10 is greater than 0.5 and equal to or less than 0.57 so that the motor has high cost performance.
The present invention also provides a compressor 100. The compressor 100 according to the embodiment of the present invention includes the motor 1000 according to the above-described embodiment of the present invention.
Therefore, the compressor 100 according to the embodiment of the present invention has the advantages of low vibration noise, high efficiency, etc.
It will be understood by those skilled in the art that the compressor 100 according to the embodiment of the present invention further includes a housing 1001, a crankshaft 1022, a main bearing 102, a cylinder 103, a piston 104, and a sub-bearing 105, as shown in fig. 6. The components of the housing, crankshaft 1022, main bearing 102, cylinder 103, piston 104, and secondary bearing 105 may be known and are not relevant to the inventive aspects of the present application and therefore will not be described in detail.
The invention also provides refrigeration equipment. The refrigerating apparatus according to the embodiment of the present invention includes the compressor 100 according to the above-described embodiment of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A stator core, comprising:
the stator core comprises a body and a plurality of stator teeth, wherein a stator slot is defined between every two adjacent stator teeth and the yoke, the body is provided with a first end surface and a second end surface which are opposite in the axial direction of the stator core, the outer edge of the yoke is provided with a mounting groove, and the mounting groove penetrates through the yoke along the axial direction of the stator core; and
a holder, the holder comprising:
a first holding portion provided on the first end face and a second holding portion provided on the second end face; and
a third holding portion, at least a portion of which is provided in the mounting groove, the third holding portion having a first end and a second end that are opposite in an axial direction of the stator core, the first end of the third holding portion being continuous with the first holding portion, the second end of the third holding portion being continuous with the second holding portion, an outer edge of the first holding portion being located inside an outer edge of the yoke portion, an outer edge of the second holding portion being located inside an outer edge of the yoke portion, and an outer edge of the third holding portion being located inside an outer edge of the yoke portion.
2. The stator core according to claim 1, wherein the mounting groove is plural, the plural mounting grooves are provided at intervals in a circumferential direction of the stator core, the third retaining portion is plural, and the plural third retaining portions are provided in the plural mounting grooves in one-to-one correspondence.
3. The stator core according to claim 2, wherein a plurality of the mounting grooves are opposed to a plurality of the stator teeth one by one in an inward and outward direction, and a plurality of the third retaining portions are opposed to a plurality of the stator teeth one by one in the inward and outward direction.
4. The stator core according to claim 1, wherein an extending direction of each of the mounting slots is parallel to an axial direction of the stator core.
5. The stator core according to any one of claims 1 to 4, wherein the holder is integrally injection molded.
6. A stator, comprising:
a stator core according to any one of claims 1-5; and
the stator winding is wound on the stator teeth of the stator core and comprises a first part, a second part and a third part, the first part and the second part are located outside a stator slot of the stator core, and the third part is located inside the stator slot.
7. The stator of claim 6, wherein the first retention portion covers at least a portion of the first portion and the second retention portion covers at least a portion of the second portion.
8. An electrical machine comprising a stator according to claim 7.
9. A compressor, characterized by comprising an electric motor, said electric motor being according to claim 8.
10. A refrigeration apparatus, comprising a compressor, the compressor being in accordance with claim 9.
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| CN202011581681.7A CN112564324B (en) | 2020-12-28 | 2020-12-28 | Stator core, stator, motor, compressor and refrigeration plant |
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| CN202011581681.7A CN112564324B (en) | 2020-12-28 | 2020-12-28 | Stator core, stator, motor, compressor and refrigeration plant |
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| CN112737156A (en) * | 2020-12-28 | 2021-04-30 | 安徽美芝精密制造有限公司 | Stator, motor, compressor and refrigeration plant |
| CN113872350B (en) * | 2021-10-14 | 2023-08-01 | 广东美芝制冷设备有限公司 | Stator structure, motor structure, compressor structure and refrigeration equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120262014A1 (en) * | 2011-04-15 | 2012-10-18 | Asmo Co., Ltd. | Bus bar device, stator, motor and manufacturing method for stator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08265995A (en) * | 1995-03-17 | 1996-10-11 | Yaskawa Electric Corp | Stator for mold motor |
| JP4253574B2 (en) * | 2003-02-20 | 2009-04-15 | 株式会社日立産機システム | Permanent magnet type rotating electric machine and compressor using the same |
| JP2005080451A (en) * | 2003-09-02 | 2005-03-24 | Matsushita Electric Ind Co Ltd | Electric motor |
| JP4758484B2 (en) * | 2008-01-24 | 2011-08-31 | ダイキン工業株式会社 | Compressor |
| EP2940831B1 (en) * | 2012-12-28 | 2019-11-06 | Top Co., Ltd. | Rotary machine, and electric vehicle |
| JP6344441B2 (en) * | 2016-09-08 | 2018-06-20 | ダイキン工業株式会社 | Stator, motor and compressor |
| CN206962547U (en) * | 2017-07-31 | 2018-02-02 | 广东美芝制冷设备有限公司 | Stator, motor and compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120262014A1 (en) * | 2011-04-15 | 2012-10-18 | Asmo Co., Ltd. | Bus bar device, stator, motor and manufacturing method for stator |
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