CN114069908A

CN114069908A - Stator, motor, compressor and electrical equipment

Info

Publication number: CN114069908A
Application number: CN202111494428.2A
Authority: CN
Inventors: 徐飞; 程文; 邱小华; 张肃; 江波; 丁云霞
Original assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-02-18

Abstract

The invention provides a stator, a motor, a compressor and electrical equipment. Wherein, the stator includes: the stator punching sheets are connected into at least two iron core sections along the axial direction of the stator, and the adjacent iron core sections are arranged at intervals; the thickness sum of the plurality of iron core sections which are connected together along the axial direction of the stator is L, the thickness of the stator is d, L and d meet the requirement, and L is larger than d and is smaller than or equal to 1.5L. According to the invention, the at least two iron core sections formed by connecting the plurality of stator punching sheets in the stator are arranged at intervals, and heat dissipation is carried out through the gap between the at least two iron core sections in the operation process of the motor, so that the heat dissipation efficiency of the stator of the motor is improved, and the operation fault of the motor caused by overheating of a winding on the stator is avoided. And the numerical relation of the thickness of the stator in the axial direction and the sum of the thicknesses of the plurality of connected iron core sections is limited, so that the heat dissipation efficiency of the stator is improved, and the stator is ensured to have enough strength.

Description

Stator, motor, compressor and electrical equipment

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a stator, a motor, a compressor and electrical equipment.

Background

In the related art, the winding of the motor generates heat in the operation process, and if the winding on the stator is not radiated in time, the operation fault of the motor is easily caused.

Disclosure of Invention

The present invention is directed to solving one of the technical problems of the prior art or the related art.

To this end, a first aspect of the invention proposes a stator.

A second aspect of the invention proposes an electric machine.

A third aspect of the present invention provides a compressor.

A fourth aspect of the invention proposes an electrical apparatus.

In view of this, according to a first aspect of the present invention, there is provided a stator comprising: the stator punching sheets are connected into at least two iron core sections along the axial direction of the stator, and the adjacent iron core sections are arranged at intervals; the thickness sum of the plurality of iron core sections which are connected together along the axial direction of the stator is L, the thickness of the stator is d, L and d meet the requirement, and L is larger than d and is smaller than or equal to 1.5L.

The stator provided by the invention is of a split structure, and specifically comprises a plurality of stator punching sheets, the shape and the structure of each stator punching sheet are the same, the plurality of stator punching sheets are arranged in a stacking manner to form at least two iron core sections, and the plurality of iron core sections jointly form a main body of the stator. For being overall structure with the stator design, the processing degree of difficulty of the split type stator that constitutes through a plurality of stator punching sheets reduces, also is liable to maintain more and changes. The stator punching sheets are coaxially distributed in the axial direction of the stator, and at least two adjacent iron core sections in at least two iron core sections formed by the stator punching sheets are arranged at intervals, namely, a gap is formed between the at least two iron core sections. The gaps between the core segments enable heat dissipation from the windings in the stator. At the motor operation in-process, motor stator can produce a large amount of heats, and this application makes to have the clearance between two adjacent iron core sections through setting up by two at least iron core section intervals that a plurality of stator punching sheet are constituteed, and the heat in the stator punching sheet all can dispel the heat through the clearance promptly, has improved the radiating efficiency of stator.

In the axial direction of the stator, the sum of the thickness superposition of the plurality of core segments connected together is denoted as L, and the thickness of the stator is denoted as d. It can be understood that the sum of the gaps between the plurality of core segments in the stator, specifically, the sum of the gaps between the plurality of stator laminations can be represented as S by calculating the difference between the thickness of the stator and the sum of the thicknesses of the plurality of core segments, where S is d-L.

This application sets up the thickness of stator into the thickness stack sum that is greater than a plurality of iron core sections, and L is < d promptly, can guarantee to be provided with sufficient clearance between the iron core section to guarantee the radiating effect of stator. The thickness of the stator is set to be less than or equal to 1.5 times of the thickness superposition sum of the iron core sections, namely the thickness superposition sum of the stator punching sheets of which the sum of the gaps among the plurality of iron core sections is less than or equal to 0.5 time is ensured, and the problem of low stator strength caused by overlarge gaps among the plurality of stator punching sheets is solved.

In the correlation technique, the motor can produce a large amount of heats at the operation in-process stator, because the stator is the integral type structure, or the stator lamination structure of laminating each other, then lead to the heat in the motor stator difficult heat dissipation to influence the stability of motor operation.

This application sets up through two at least iron core section intervals that connect into by a plurality of stator punching in with the stator, at the motor operation in-process, dispels the heat through the clearance between two at least iron core sections, has improved the radiating efficiency of the stator of motor, avoids because the winding on the stator is overheated to lead to motor operation trouble. And the numerical relation of the thickness of the stator in the axial direction and the sum of the thicknesses of the plurality of connected iron core sections is limited, so that the heat dissipation efficiency of the stator is improved, and the stator is ensured to have enough strength.

In addition, according to the stator in the above technical solution provided by the present invention, the following additional technical features may be further provided:

in one possible design, the number of core segments is a, where 2. ltoreq. a.ltoreq.4.

In this design, the stator includes a plurality of core segments, and each of the plurality of core segments includes at least one stator lamination, and it is understood that the number of stator laminations in each core segment may be different, for example: the stator includes two iron core sections, and wherein, including two stator punching in one iron core section, including five stator punching in another iron core section, a plurality of stator punching can be selected for the stator punching that size specification equals.

Through injecing the ascending segmentation number of iron core axial, injecing segmentation number for 2 more than or equal to, and less than or equal to 4, can guarantee to improve the radiating while of stator, satisfy the requirement of motor performance.

It is worth to be noted that, in the case that the number of the stator laminations in the stator is fixed, the smaller the number of the core segments in the stator is, the larger the number of the stator laminations in each core segment is, and the running performance of the motor can be improved, so that the number of the stator segments is set to be equal to or less than 4. Under the condition that the number of stator punching sheets in the stator is fixed, the number of the iron core sections in the stator is larger, the number of the stator punching sheets in each iron core section is smaller, and the number of the gaps in the stator is increased due to the gaps in the iron core sections, so that the heat radiation performance of the motor is improved. The number of the iron core sections after the iron core is segmented in the axial direction is limited, and is specifically limited within the range of more than or equal to 2 and less than or equal to 4, so that the stator has a good heat dissipation effect while the running performance of the motor is met.

In one possible design, the plurality of core segments includes at least two core segments having different thicknesses in an axial direction of the stator.

In the design, the number of the stator laminations in the plurality of iron core segments can be set to be different, and the thicknesses of the stator laminations in the axial direction of the stator are the same, so that the thicknesses of the plurality of iron core segments in the axial direction are set to be different. Along the axial of stator, set up the iron core section into different thickness to can improve the full groove rate of stator, be favorable to fluid and the refrigerant in the compressor directly to take away the heat of winding on the stator, further improve the radiating efficiency of stator. In one possible design, the plurality of core segments include a first core segment and a second core segment, the thickness of the first core segment is less than the thickness of the second core segment, and the first core segment is closer to one side of the motor lead wire than the second core segment.

In this design, a plurality of iron core sections set up along the axial of stator, and the less first iron core setting of thickness is in the one side that is close to the motor lead-out wire, can make the clearance between the iron core section be close to the one side of motor lead-out wire more. It can be understood that, the motor is at the operation in-process, and one side temperature rise of motor lead-out wire is very fast, and thickness setting through the first core section that will be close to one side of motor lead-out wire is less, can guarantee that the clearance between the core section is close to the motor lead-out wire more, has further improved the radiating effect.

It can be understood that the intervals among the plurality of core segments are equal, and the thickness of the plurality of core segments gradually increases from one end close to the outgoing line of the motor to the other end along the axial direction of the stator. In the motor operation process, the temperature of one side that is close to motor lead-out wire more is higher, sets up the thickness through a plurality of iron core sections to increase gradually from the one end that is close to motor lead-out wire to the other end, can guarantee that the clearance between the iron core section that is close to motor lead-out wire one side is denser, has guaranteed the radiating effect.

In one possible design, the stator further comprises: and the supporting piece is arranged between the two adjacent iron core sections and is a non-magnetic-conduction supporting piece.

In this design, a support is provided between adjacent core segments, the support being a non-magnetically conductive support. In the axial direction of the stator, the supporting piece of the non-magnetic material is arranged between the adjacent iron core sections, so that enough gaps can be ensured to exist between the adjacent iron core sections, the structure of the stator formed by the laminated arrangement of the iron core sections is more stable, and the integral strength of the stator is improved.

In one possible design, the stator lamination includes: a plurality of pieced and connected partitioned punching sheets; the connecting piece is arranged between two adjacent segmented punching sheets in the segmented punching sheets connected in a splicing manner.

In the design, the stator punching sheet comprises a plurality of blocking punching sheets, and the blocking punching sheets are detachably connected. Specifically, a plurality of blocking towards piece through connecting piece end to end connection each other, along circumference concatenation constitution stator towards piece jointly. A connecting device can be arranged between two adjacent segmented punching sheets, the two segmented punching sheets are detachably connected, and a connecting structure can also be arranged at the end part of each segmented punching sheet so as to realize the connection and separation between the two segmented punching sheets. Through the structure that sets up the piecemeal towards the piece into mutual detachable connection, thereby when processing the stator towards the piece, only process a plurality of piecemeal towards the piece can, again assemble a plurality of piecemeal towards the piece part and make up into the stator towards the piece, compare in processing a complete stator towards the piece, the degree of difficulty of processing piecemeal towards the piece part reduces, thereby manufacturing cost has been reduced, this kind of stator simple structure, the automated production to the stator is realized to accessible automation line, and, be split type mosaic structure with the stator design, be favorable to improving the groove fullness rate of motor.

The shape and structure of each segmented stator punching sheet are the same, and one of the segmented stator punching sheets is taken as an example for explanation.

The segmented stator punching sheet comprises a tooth part and a yoke part, wherein the yoke part is connected with the tooth part. Under the state that a plurality of sub-stators splice into the stator punching, yoke portion sets up in the one side that is close to the stator punching outward flange, and tooth portion sets up in the one side that is close to the stator punching inward flange.

In one possible design, the connector includes: the first connecting part is arranged on one edge of the segmented punching sheet extending along the radial direction of the stator punching sheet; the second connecting portion set up in another edge that the piece is towards piece stator punching piece radial extension, and the first connecting portion of a piece can be connected with the second connecting portion of adjacent piece towards the piece.

In the design, two adjacent stator punching sheets are connected through a first connecting part, and the connecting part comprises a first connecting part and a second connecting part. First connecting portion set up in the piece towards piece along the radial edge that extends of stator towards piece, second connecting portion set up in the piece towards piece along the radial another edge that extends of stator towards piece, also promptly, first connecting portion and second connecting portion locate the both sides of piece towards piece respectively along the circumference of stator towards piece. The first connecting portion of one piece of lamination is cooperated with the second connecting portion of another adjacent piece of lamination, so that the connection of the two pieces of lamination is realized. The plurality of the partitioned punching sheets are arranged along the circumferential direction of the stator, and any two adjacent partitioned punching sheets are matched through the first connecting portion and the second connecting portion, so that connection among the plurality of the partitioned punching sheets is realized, and the stator punching sheets are formed in a surrounding mode.

The first connecting portion and the second connecting portion can be separated from each other, and two adjacent segmented punching sheets are separated from each other in the state that the first connecting portion and the second connecting portion are separated from each other, so that the stator punching sheets are decomposed. The stator can be understood in the working process, the phenomenon that a certain block punching sheet is damaged can occur, and the first connecting portion and the second connecting portion can be separated at the moment, so that the damaged block punching sheet is taken out from the stator punching sheet, the damaged block punching sheet is only replaced and maintained independently, the stator punching sheet is not required to be integrally replaced, and the maintenance cost is reduced.

Both can interconnect between first connecting portion and the second connecting portion, also alternate segregation has realized dismantling the connection between the piecemeal, easily carries out the solitary split to the piecemeal towards the piece in the stator, makes the product easily maintain more, has reduced the product maintenance cost.

Through setting up the piecemeal towards the piece into the structure that can mutual dismantlement connects, thereby when processing the stator towards the piece, only process a plurality of piecemeal towards the piece can, assemble a plurality of piecemeal towards the piece part into the stator towards the piece again, compare in processing a complete stator towards the piece, the degree of difficulty of processing piecemeal towards the piece part reduces, thereby manufacturing cost is reduced, this kind of stator simple structure, accessible automation line realizes the automated production to the stator, and, design the split type mosaic structure with the stator, be convenient for realize the winding of coil and establish, can install two adjacent piecemeal towards the piece after the coil is established and is accomplished, reduce the degree of difficulty of establishing the coil, consequently, under the condition that can the stator size is the same, establish more coils around, improve the winding of coil and establish the number of turns, be favorable to improving the groove fullness rate of motor. On the basis of not improving the size of the motor, the number of turns of the winding coil is increased, so that the output torque and the motor efficiency of the motor can be improved.

In one possible embodiment, the first connecting part is designed as a projection and the second connecting part is designed as a recess adapted to the projection.

In this design, first connecting portion are constructed as protruding piece, and the second connecting portion are constructed as the recess, that is to say, be unsmooth complex structure between first connecting portion and the second connecting portion, recess and protruding looks adaptation realize the connection cooperation of first connecting portion and second connecting portion.

Through setting up first connecting portion as protrusion, set up second connecting portion as with protrusion matched with recess, made between first connecting portion and the second connecting portion form unsmooth complex structure, promoted the connection reliability, reduced the processing degree of difficulty.

In one possible design, any of the plurality of segment punches includes: a tooth portion; and the yoke part is connected with the tooth part, and the first connecting part and the second connecting part are arranged on the yoke part.

In this design, the segmented stator laminations include a tooth and a yoke, wherein the yoke is connected to the tooth. Under the state that a plurality of sub-stators splice into the stator punching, yoke portion sets up in the one side that is close to the stator punching outward flange, and tooth portion sets up in the one side that is close to the stator punching inward flange. First connecting portion and second connecting portion in the connecting piece all set up the yoke portion position at the piecing piece, and first connecting portion are located yoke portion along the radial edge that extends of stator punching, and the second connecting portion are located yoke portion along the radial another edge that extends of stator punching. Through setting up first connecting portion and second connecting portion at two edges of yoke portion, can make between arbitrary two adjacent piecemeal punching pieces through first connecting portion and the cooperation of second connecting portion to realize being connected between a plurality of piecemeal punching pieces, thereby surround and constitute the stator punching piece.

In one possible design, the stator further comprises: and the aluminum coil is wound on the tooth part.

In this design, the material of the coil wound around the tooth portion is limited, the coil is made of an aluminum material, that is, the coil is formed by winding an aluminum wire around the tooth portion, the unit price of the aluminum wire is low, and the aluminum wire is used as the coil, so that the material cost of the motor can be reduced for the most part.

In one possible design, the stator further comprises: the cell body is located the one side that deviates from the tooth portion in the yoke portion.

In this design, one side that deviates from the tooth portion in yoke portion is provided with the cell body, has seted up the cell body in the periphery of stator promptly, and the cell body can increase the stator and be located the interval between the other parts of stator periphery side to be favorable to the compressor oil return, improve the smooth and easy nature of oil return, be favorable to improving the operating stability of compressor.

In one possible design, the yoke is taken in the radial direction of the stator core, and the slot body passes through the center line of the cross section of the yoke.

In this design, the central line of cell body process yoke portion can further improve the oil return effect, improves the smooth and easy nature of oil return, is favorable to improving the operating stability of compressor.

According to a second aspect of the invention, there is provided an electrical machine comprising: a stator assembly including a stator as in the first aspect described above and a winding wound on the stator; and a rotor disposed within the stator.

The motor provided by the invention comprises a stator assembly, wherein the stator assembly comprises a stator, a rotor and a winding wound on the stator.

The stator is internally provided with a stator slot, the rotor is arranged in the stator slot, specifically, the stator and the rotor are arranged through a shaft, and the rotor can rotate relative to the stator. Further, the stator is also provided with windings, and particularly, the windings are arranged on the stator teeth. The stator includes a plurality of teeth. The tooth portion is provided on the inner side of the stator, and is provided toward the rotor. The winding is wound on the tooth part and used for generating magnetic induction lines in the electrified state, and the rotor rotates relative to the stator, namely, the rotor rotates relative to the winding, cuts the magnetic induction lines relative to the rotor rotating relative to the winding, so that the force for driving the rotor to rotate is generated, and further the operation of the motor is realized.

Specifically, the winding can be an aluminum wire, the aluminum wire has the advantages of high conductive efficiency, low heat productivity, low density, low cost and the like, and the aluminum wire is used as the winding, so that the performance of the motor can be ensured to meet the use requirement, and the product cost can be reduced.

The motor proposed by the present application has all the benefits of the stator provided in any of the possible designs described above, since it comprises a stator according to any of the possible designs described above.

In addition, according to the motor in the above technical solution provided by the present invention, the following additional technical features may also be provided:

in one possible design, the number of pole pairs of the rotor is p, the maximum rotational speed of the rotor is n, p and n satisfy, 60 < n/p < 100.

In this design, the number of pole pairs of the rotor is correlated with the torque of the motor, but simply limiting the range of the number of pole pairs to adjust the torque tends to make it difficult for the compressor mounting the motor to reach the standard required for operation. The larger the rotating speed of the rotor is, the larger the displacement of the compressor is, and the larger the number of pole pairs is, the lower the maximum rotating speed of the rotor is, so that the maximum rotating speed of the rotor is associated with the number of pole pairs of the rotor, the ratio of the maximum rotating speed of the rotor to the number of pole pairs of the rotor is limited between 60 and 100, the torque can be reduced under the condition of the same displacement, the operating point of the motor is changed, and the efficiency of the motor is improved.

In one possible design, the number of teeth of the stator is Z, Z and n are satisfied, 20 < n/Z ≦ 34.

In this design, the maximum motor rotation speed affects the torque of the motor, but simply limiting the maximum motor rotation speed is not limited by the number of teeth of the stator, which easily causes a change in the harmonic magnetic field of the motor and affects the efficiency of the motor. Therefore, the number of teeth of the stator and the maximum rotating speed of the rotor are combined, so that the torque can be reduced under the condition of the same displacement, the operating point of the motor is changed, and the efficiency of the motor is improved.

In one possible design, the rotor is taken in the radial direction of the rotor, the outer contour of the cross section of the rotor being circular.

In this design, the rotor is taken in the radial direction of the rotor, the cross section of the rotor in the radial direction may or may not be a regular circle, and a circle passing through the outermost contour of the rotor is set as a contour circle, that is, a contour circle of the radial cross section of the rotor passes through a point or a line of the radial cross section of the rotor farthest from the center of the circle, the contour circle passes through the axis of the rotor, and if the radial cross section of the rotor is a regular circle, the contour circle coincides with the outer edge of the radial cross section of the rotor.

Further, the outer contour of the rotor may be circular. The outer contour of the rotor is set to be circular in the working process of the motor, so that the wind abrasion loss generated in the rotating process of the rotor can be effectively reduced, and the working efficiency of the motor is improved.

In one possible design, the electric machine further comprises: and the magnetic flux guide grooves penetrate through the rotor along the axial direction of the motor.

In this design, the rotor is also provided with a plurality of flux guide slots. Specifically, the rotor is formed by stacking a plurality of rotor punching sheets, a plurality of magnetic flux guide grooves are formed in any one of the rotor punching sheets, and the magnetic flux guide grooves are communicated and distributed in the rotor punching sheets along the axial direction of the motor, namely, the magnetic flux guide grooves are communicated and distributed in the rotor punching sheets along the axial direction of the motor. It is understood that during operation of the machine, radial electromagnetic waves are generated, which cause increased noise. In order to improve the noise problem of the motor, a plurality of magnetic flux guide grooves are arranged on the rotor in a penetrating mode along the axial direction of the motor, so that the lowest-order radial electromagnetic force wave of the motor can be reduced, and the noise caused by the radial electromagnetic force wave is further reduced.

The rotor is provided with the plurality of magnetic flux guide grooves, and the magnetic flux guide grooves are distributed on the rotor in a penetrating manner along the axial direction of the motor, so that the lowest-order radial electromagnetic force wave of the motor can be reduced, and the noise caused by the radial electromagnetic force wave is further reduced.

In one possible design, the number of the segmented laminations in one stator lamination is M, the number of pole pairs of the rotor is N, wherein M and N satisfy: 2/3, M is less than or equal to 6, N is less than or equal to 2.

In the design, the number of the segmented laminations in the stator laminations, the number of the magnetic pole pairs of the rotor and the proportional relationship between the segmented laminations and the magnetic pole pairs of the rotor all affect the performance of the motor, and in order to ensure that the performance parameters of the motor are in a better range, the number of the segmented laminations in the stator laminations, the number of the magnetic pole pairs of the rotor and the proportional relationship between the segmented laminations and the magnetic pole pairs of the rotor are limited.

Specifically, the number of the segmented punching sheets in one stator punching sheet is M, the number of magnetic pole pairs of the rotor is N, wherein M and N satisfy the following conditions: 2/3, M is less than or equal to 6, N is less than or equal to 2.

The number of the segmented punching sheets in one stator punching sheet is limited to be less than or equal to 6, the magnetic pole pair number of the rotor is less than or equal to 2, and the ratio of the number of the segmented punching sheets in one stator punching sheet to the magnetic pole pair number of the rotor is 2/3, so that the performance of the motor can be guaranteed to be in a better range, and the motor can meet the use requirement.

In one possible design, the rated torque of the motor is T1, the inner diameter of the stator lamination is Φ 1, and the unit volume torque of the rotor is T2, wherein T1, Φ 1 and T2 satisfy:

5.18×10^-7≤T1×Φ1^-3×T2^-1≤1.17×10^-6，

5kN·m·m^-3≤T2≤45kN·m·m^-3。

in this design, the range of the combined variables among the rated torque of the motor, the inner diameter of the stator lamination, and the unit volume torque of the rotor is limited. The output torque of the motor can meet the requirements of equipment arranged on the motor by limiting the range of the combined variable.

Specifically, the rated torque of the motor is T1, the inner diameter of the stator punching sheet is Φ 1, and the unit volume torque of the rotor is T2, wherein T1, Φ 1 and T2 satisfy:

5.18×10^-7≤T1×Φ1^-3×T2^-1≤1.17×10^-6，

5kN·m·m^-3≤T2≤45kN·m·m^-3。

the combined variable of the rated torque of the motor, the inner diameter of the stator punching sheet and the unit volume torque of the rotor is limited to be more than or equal to 5.18 multiplied by 10^-7And is not more than 1.17X 10^-6And a torque per unit volume of the rotor is limited to 5kN m or more^-3And not more than 45kN · m^-3The output torque of the motor can meet the requirements of equipment arranged on the motor.

According to a third aspect of the present invention, there is provided a compressor comprising: the motor as in the second aspect described above; and a compression part, to which the motor is connected.

The compressor provided by the invention comprises a motor and a compression component, wherein the motor is connected with the compression component and can drive the compression component to move. The motor in any one of the possible designs in the second aspect is selected for use, so that all the beneficial effects of the motor in any one of the possible designs are achieved, and redundant description is not repeated herein.

According to a fourth aspect of the present invention, there is provided an electric apparatus comprising: an apparatus main body; and a compressor as in the above third aspect, the compressor being connected to the apparatus main body

The electrical equipment provided by the invention comprises an equipment main body and a compressor, wherein the compressor is arranged in the equipment main body. The compressor is selected as the compressor in the third aspect, so that the compressor has all the advantages of the compressor in any one of the possible designs, and redundant description is not repeated herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows one of the structural schematics of a stator of one embodiment of the present invention;

FIG. 2 shows a second schematic structural view of a stator of one embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a stator lamination of an embodiment of the invention;

FIG. 4 is a schematic structural diagram of a partitioning sheet according to an embodiment of the present invention;

FIG. 5 illustrates a schematic structural view of a rotor sheet according to an embodiment of the present invention;

fig. 6 shows a schematic configuration of a compressor according to another embodiment of the present invention.

Wherein, the corresponding relation between the reference numbers and the names of the components in fig. 1 to 6 is

100 stators, 110 stator punching sheets, 111 segmented punching sheets, 1112 tooth parts, 1114 yoke parts, 112 connectors, 1122 first connecting parts, 1124 second connecting parts, 120 groove bodies, 130 iron core sections, 132 first iron core sections, 134 second iron core sections, 200 rotors, 210 rotor punching sheets, 211 first magnetic steel grooves, 212 second magnetic steel grooves, 300 compressors, 310 compression parts, 311 cylinders, 312 pistons, 320 crankshafts, 330 main bearings and 340 auxiliary bearings.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A stator, a motor, a compressor, and an electric appliance according to some embodiments of the present invention will be described with reference to fig. 1 to 6.

The first embodiment is as follows:

as shown in fig. 1, 2, 3 and 4, a first embodiment of the present embodiment provides a stator 100 including: a plurality of stator laminations 110.

The plurality of stator laminations 110 are connected into at least two core segments 130, and the adjacent core segments 130 are arranged at intervals;

the thickness sum of the plurality of iron core segments 130 connected together along the axial direction of the stator 100 is L, the thickness of the stator 100 is d, L and d meet, and L < d is less than or equal to 1.5L, wherein the thickness sum of the plurality of stator laminations 110 along the axial direction of the stator 100 is L, the thickness of the stator 100 is d, L and d meet, and L < d is less than or equal to 1.5L.

The stator 100 provided in this embodiment is a split structure, specifically, the stator 100 includes a plurality of stator laminations 110, each stator lamination 110 has the same shape and structure, the plurality of stator laminations 110 are stacked to form at least two core segments 130, and the plurality of core segments 130 jointly form a main body of the stator 100. For being overall structure with stator 100 design, the processing degree of difficulty of split type stator 100 through a plurality of stator punching sheet 110 constitution reduces, also is easily maintained and is changed more. The plurality of stator laminations 110 are coaxially distributed in the axial direction of the stator 100, and at least two adjacent core segments 130 of at least two core segments 130 formed by the plurality of stator laminations 110 are arranged at intervals, that is, a gap is formed between the at least two core segments 130. The gaps between the core segments 130 allow for heat dissipation from the windings in the stator 100. At the motor operation in-process, motor stator can produce a large amount of heats, and this application makes to have the clearance between two adjacent iron core sections 130 through setting up by two at least iron core sections 130 intervals that a plurality of stator punching sheet 110 are constituteed, and the heat homoenergetic in stator punching sheet 110 promptly dispels the heat through the clearance, has improved stator 100's radiating efficiency.

In the axial direction of the stator 100, the sum of the thickness sums of the plurality of core segments 130 connected together is denoted by L, and the thickness of the stator 100 is denoted by d. It can be understood that the sum of the gaps between the plurality of core segments 130 in the stator 100, specifically, the sum of the gaps between the plurality of stator laminations 110 can be represented as S by calculating the difference between the thickness of the stator 100 and the sum of the thicknesses of the plurality of core segments 130, where S is d-L.

This application sets up the thickness of stator 100 into the thickness stack sum that is greater than a plurality of iron core sections 130, and L is < d promptly, can guarantee to be provided with sufficient clearance between the iron core section 130 to guarantee stator 100's radiating effect. The thickness of the stator 100 is set to be less than or equal to 1.5 times of the thickness superposition sum of the iron core segments 130, that is, the thickness superposition sum of the stator laminations 110 is ensured to be less than or equal to 0.5 times of the sum of the gaps among the plurality of iron core segments 130, and the problem of low strength of the stator 100 caused by overlarge gaps among the plurality of stator laminations 110 is solved.

In the related art, the motor can produce a large amount of heat at operation in-process stator 100, because stator 100 is the integral type structure, or the stator punching 110 structure of laminating each other, then lead to the difficult heat dissipation of heat in the motor stator to influence the stability of motor operation.

This application sets up through two at least iron core sections 130 intervals that connect into by a plurality of stator punching sheets 110 in with stator 100, and at the motor operation in-process, dispel the heat through the clearance between two at least iron core sections 130, has improved the radiating efficiency of the stator 100 of motor, avoids because the winding on stator 100 is overheated to lead to motor operation trouble. And the numerical relationship between the thickness of the stator 100 in the axial direction and the sum of the thicknesses of the plurality of core segments 130 connected together is defined, so that the sufficient strength of the stator 100 is ensured while the heat dissipation efficiency of the stator 100 is improved.

As shown in FIGS. 1 and 2, in any of the above embodiments, the number of core segments 130 is a, where 2. ltoreq. a.ltoreq.4.

In this embodiment, the stator 100 includes a plurality of core segments 130, and each core segment 130 of the plurality of core segments 130 includes at least one stator lamination 110 therein, it is understood that the number of stator laminations 110 in each core segment 130 may be different, for example: the stator 100 includes two core segments 130, wherein one core segment 130 includes two stator laminations 110, another core segment 130 includes five stator laminations 110, and the plurality of stator laminations 110 can be selected as the stator laminations 110 with the same size and specification.

By limiting the number of segments in the axial direction of the iron core, the number of segments is limited to be more than or equal to 2 and less than or equal to 4, so that the requirement on the performance of the motor can be met while the heat dissipation of the stator 100 is ensured to be improved.

It is worth noting that, in the case that the number of the stator laminations 110 in the stator 100 is fixed, the smaller the number of the core segments 130 in the stator 100 is, the larger the number of the stator laminations 110 in each core segment 130 is, so that the running performance of the motor can be improved, and therefore, the number of the stator 100 is set to be equal to or less than 4. Under the condition that the number of the stator punching sheets 110 in the stator 100 is fixed, the larger the number of the core segments 130 in the stator 100 is, the smaller the number of the stator punching sheets 110 in each core segment 130 is, and because gaps exist among the core segments 130, the number of the gaps in the stator 100 is increased, so that the heat radiation performance of the motor is improved. The number of the iron core segments 130 after the iron core is segmented in the axial direction is limited, and is specifically limited within the range of more than or equal to 2 and less than or equal to 4, so that the stator 100 has a good heat dissipation effect while the running performance of the motor is satisfied.

As shown in fig. 1 and 2, in any of the above embodiments, the plurality of core segments 130 includes at least two core segments 130 having different thicknesses in the axial direction of the stator 100.

In this embodiment, the number of the stator laminations 110 in the plurality of core segments 130 may be set to be different, and since the thicknesses of the stator laminations 110 in the axial direction of the stator 100 are the same, the thicknesses of the plurality of core segments 130 in the axial direction are set to be different. Along the axial of stator 100, set up iron core section 130 into different thickness to can improve the full slot rate of stator 100, be favorable to oil and the refrigerant in the compressor directly to take away the heat of winding on stator 100, further improve stator 100's radiating efficiency.

It is worth noting that in the case where a gap is provided between each adjacent core segment 130 of the plurality of core segments 130, the size of the gap between the adjacent two core segments 130 is correlated with the size of the adjacent two core segments 130.

In some embodiments, in the case that the thicknesses of the two adjacent core segments 130 are larger, the gap therebetween is set to be larger, thereby improving the heat dissipation effect between the adjacent core segments 130.

In any of the above embodiments, the plurality of core segments 130 includes the first core segment 132 and the second core segment 134, the thickness of the first core segment 132 is smaller than that of the second core segment 134, and the first core segment 132 is closer to the lead wire of the motor than the second core segment 134.

In this embodiment, the plurality of core segments 130 are arranged in the axial direction of the stator 100, and the first core having a smaller thickness is arranged on the side close to the motor lead-out wire, so that the gap between the core segments 130 can be made closer to the motor lead-out wire side. It can be understood that, the motor is at the operation in-process, and one side temperature rise of motor lead-out wire is very fast, and the thickness setting through the first core segment 132 that will be close to one side of motor lead-out wire is less, can guarantee that the clearance between the core segment 130 is close to the motor lead-out wire more, has further improved the radiating effect.

It is understood that the plurality of core segments 130 are equally spaced, and the thickness of the plurality of core segments 130 gradually increases from one end near the motor lead-out wire to the other end in the axial direction of the stator 100. In the motor operation process, the temperature is higher more near one side of motor lead-out wire, sets up the thickness through a plurality of iron core sections 130 to increase gradually from the one end that is close to the motor lead-out wire to the other end, can guarantee that the clearance between the iron core section 130 that is close to motor lead-out wire one side is denser, has guaranteed the radiating effect.

In any of the above embodiments, the stator 100 further comprises: and the supporting piece is arranged between two adjacent iron core segments 130 and is a non-magnetic-conduction supporting piece.

In this embodiment, a support is disposed between adjacent core segments 130, the support being a non-magnetic support. In the axial direction of the stator 100, by providing the supporting member of the non-magnetic conductive material between the adjacent core segments 130, not only can a sufficient gap be ensured between the adjacent core segments 130, but also the structure of the stator 100 formed by the stacked arrangement of the core segments 130 is more stable, and the strength of the whole stator 100 is improved.

As shown in fig. 3 and 4, in any of the above embodiments, the stator punching sheet 110 includes: a plurality of pieced connected piece punching sheets 111 and connecting pieces 112.

The connecting piece 112 is arranged between two adjacent segmented punching sheets 111 in the segmented punching sheets 111 connected in a splicing manner, and the two adjacent segmented punching sheets 111 are detachably connected through the connecting piece 112.

In this embodiment, the stator punching sheet 110 includes a plurality of segmented punching sheets 111, and the plurality of segmented punching sheets 111 are detachably connected to each other. Specifically, the plurality of segmented laminations 111 are connected end to end through the connecting pieces 112 and are spliced in the circumferential direction to form the stator lamination 110. A connecting device can be arranged between two adjacent segmented punching sheets 111, the two segmented punching sheets 111 can be detachably connected, and a connecting structure can also be arranged at the end part of each segmented punching sheet 111 to realize the connection and separation between the two segmented punching sheets 111. Through setting up the structure that can mutual dismantlement connect with piecemeal punching sheet 111, thereby when processing stator punching sheet 110, only process a plurality of piecemeal punching sheets 111 can, assemble a plurality of piecemeal punching sheets 111 parts into stator punching sheet 110 again, compare in processing a complete stator punching sheet 110, the degree of difficulty of processing piecemeal punching sheet 111 parts reduces, thereby manufacturing cost has been reduced, this kind of stator 100 simple structure, accessible automation line realizes the automated production to stator 100, and, design stator 100 for split type mosaic structure, be favorable to improving the groove fullness rate of motor.

The shape and structure of each of the segmented stator laminations 110 are the same, and one of the segmented stator laminations 110 is taken as an example for description.

The segmented stator lamination 110 includes a tooth 1112 and a yoke 1114, wherein the yoke 1114 is connected to the tooth 1112. In a state where the plurality of segmented stators 100 are spliced to form the stator lamination 110, the yoke portion 1114 is disposed at a side close to an outer edge of the stator lamination 110, and the tooth portion 1112 is disposed at a side close to an inner edge of the stator lamination 110.

As shown in fig. 3 and 4, in any of the above embodiments, the connecting member 112 includes: a first connection portion 1122 and a second connection portion 1124.

The first connecting portion 1122 is arranged at an edge of the segmented punching sheet 111 extending along the radial direction of the stator punching sheet 110;

the second connecting portion 1124 is disposed at another edge of the stator lamination 110 of the segmented lamination 111, where the first connecting portion 1122 of one segmented lamination 111 can be connected to the second connecting portion 1124 of the adjacent segmented lamination 111.

In this embodiment, two adjacent stator laminations 110 are connected at the beginning by a connecting piece 112, and the connecting piece 112 includes a first connecting portion 1122 and a second connecting portion 1124. First connecting portion 1122 sets up in a marginal along stator punching 110 radial extension of piecemeal punching sheet 111, and second connecting portion 1124 sets up in another marginal along stator punching 110 radial extension of piecemeal punching sheet 111, also promptly, first connecting portion 1122 and second connecting portion 1124 locate the both sides of piecemeal punching sheet 111 respectively along stator punching 110's circumference. The first connecting portion 1122 of one piece of the segmented punched piece 111 is matched with the second connecting portion 1124 of another adjacent piece of the segmented punched piece 111, so that the connection of the two piece of the segmented punched piece 111 is realized. The plurality of segmented punching sheets 111 are arranged along the circumferential direction of the stator 100, so that any two adjacent segmented punching sheets 111 are matched through the first connecting portion 1122 and the second connecting portion 1124, connection among the plurality of segmented punching sheets 111 is achieved, and the stator punching sheets 110 are formed in a surrounding mode.

The first connection portion 1122 and the second connection portion 1124 may be separated from each other, and in a state where the first connection portion 1122 and the second connection portion 1124 are separated, the two adjacent segmented sheets 111 are separated from each other, thereby realizing the disassembly of the stator sheet 110. It can be understood that, in the working process of the stator 100, a phenomenon that a certain piece of the segmented punching sheet 111 is damaged may occur, and at this time, the first connecting portion 1122 and the second connecting portion 1124 may be separated, so that the damaged segmented punching sheet 111 is taken out of the stator punching sheet 110, and only the damaged segmented punching sheet 111 is replaced and repaired individually, without replacing the whole stator punching sheet 110, thereby reducing the maintenance cost.

First connecting portion 1122 and second connecting portion 1124 can both interconnect, also alternate segregation has realized dismantling the connection between the piecemeal, easily carries out the independent split to piecemeal towards piece 111 in stator 100, makes the product easier to maintain, has reduced the product maintenance cost.

Through setting up the lamination 111 into the structure that can mutual dismantlement connects, thereby when processing stator punching 110, only process a plurality of lamination 111 can, assemble a plurality of lamination 111 parts into stator punching 110 again, compare in processing a complete stator punching 110, the degree of difficulty of processing lamination 111 parts reduces, thereby manufacturing cost has been reduced, this kind of stator 100 simple structure, accessible automation line realizes the automated production to stator 100, and, design stator 100 into split type mosaic structure, be convenient for realize the winding of coil, can install two adjacent lamination 111 after coil winding is accomplished, reduce the degree of difficulty of winding the coil, consequently, can be under the same circumstances of stator 100 size, more coils are wound, improve the winding number of turns of coil, be favorable to improving the groove fullness rate of motor. On the basis of not improving the size of the motor, the number of turns of the winding coil is increased, so that the output torque and the motor efficiency of the motor can be improved.

As shown in fig. 3 and 4, in some embodiments, the first connection portion 1122 and the second connection portion 1124 are integrated with the segmented sheet 111.

In these embodiments, the first connection portion 1122, the second connection portion 1124 and the segmented laminations 111 are integrally formed, so that the manufacturing process of the stator 100 is further simplified.

In any of the above embodiments, the first connecting portion 1122 is configured as a protrusion, and the second connecting portion 1124 is configured as a groove adapted to fit the protrusion.

In this embodiment, the first connecting portion 1122 is configured as a protrusion, and the second connecting portion 1124 is configured as a groove, that is, a concave-convex fit structure is formed between the first connecting portion 1122 and the second connecting portion 1124, and the groove is matched with the protrusion, so that the first connecting portion 1122 and the second connecting portion 1124 are connected and matched.

Through setting up first connecting portion 1122 as protrusion, set up second connecting portion 1124 as the recess with protrusion matched with, made between first connecting portion 1122 and the second connecting portion 1124 formed unsmooth complex structure, promoted the connection reliability, reduced the processing degree of difficulty.

As shown in fig. 3 and 4, in any of the above embodiments, any one of the segment punching sheets 111 in the plurality of segment punching sheets 111 includes: a tooth 1112 and a yoke 1114.

The yoke 1114 is connected to the tooth 1112, and the first connection portion 1122 and the second connection portion 1124 are both provided to the yoke 1114.

In this embodiment, the segmented stator lamination 110 includes a tooth 1112 and a yoke 1114, wherein the yoke 1114 is connected to the tooth 1112. In a state where the plurality of segmented stators 100 are spliced to form the stator lamination 110, the yoke portion 1114 is disposed at a side close to an outer edge of the stator lamination 110, and the tooth portion 1112 is disposed at a side close to an inner edge of the stator lamination 110. The first connecting portion 1122 and the second connecting portion 1124 in the connecting member 112 are both disposed at the yoke portion 1114 position of the segmented punching sheet 111, the first connecting portion 1122 is located at one edge of the yoke portion 1114 extending along the radial direction of the stator punching sheet 110, and the second connecting portion 1124 is located at the other edge of the yoke portion 1114 extending along the radial direction of the stator punching sheet 110. Through setting up first connecting portion 1122 and second connecting portion 1124 at two edges of yoke portion 1114, can make between arbitrary two adjacent lamination pieces 111 through cooperation of first connecting portion 1122 and second connecting portion 1124 to realize being connected between a plurality of lamination pieces 111, thereby surround and constitute stator punching 110.

In any of the above embodiments, the stator 100 further comprises an aluminum coil. An aluminum coil is wound around the teeth 1112.

In this embodiment, the material of the coil wound around the tooth 1112 is limited, the coil is made of aluminum, that is, the coil is formed by winding an aluminum wire around the tooth 1112, the unit price of the aluminum wire is low, and the aluminum wire is used as the coil, so that the material cost of the motor can be reduced in most cases.

As shown in fig. 3 and 4, in any of the above embodiments, the stator 100 further includes a slot 120. The slot 120 is disposed in the yoke 1114 on a side facing away from the teeth 1112.

In this embodiment, a slot 120 is disposed on a side of the yoke 1114 away from the tooth 1112, that is, the slot 120 is disposed on the outer periphery of the stator 100, and the slot 120 can increase the distance between the stator 100 and other components located on the outer periphery of the stator 100, so as to facilitate oil return of the compressor, improve the smoothness of the oil return, and facilitate the operation stability of the compressor.

In any of the above embodiments, the yoke 1114 is taken along the radial direction of the core of the stator 100, and the slot 120 passes through the center line of the cross section of the yoke 1114.

In this embodiment, the central line of slot body 120 process yoke portion 1114 can further improve the oil return effect, improves the smoothness nature of oil return, is favorable to improving the operating stability of compressor.

Example two:

as shown in fig. 1, 2, 3, 4 and 5, a second embodiment of the present invention provides a motor including: a stator assembly and a rotor 200.

The stator assembly comprises a stator 100 and a winding wound on the stator, wherein the stator 100 is selected as the stator 100 in the first embodiment;

and a rotor 200 disposed inside the stator 100.

The motor provided by the embodiment comprises a stator assembly, wherein the stator assembly comprises a stator, a rotor 200 and a winding wound on the stator.

Wherein, stator slot is equipped with in the stator, and rotor 200 sets up in the stator slot, and specifically, the stator is worn the axle with rotor 200 and is set up, and rotor 200 can rotate for the stator. Further, the stator is also provided with windings, and particularly, the windings are arranged on the stator teeth. The stator includes a plurality of teeth 1112. The teeth 1112 are provided inside the stator and face the rotor 200. The winding is wound on the tooth 1112, the winding is used for generating magnetic induction lines in a power-on state, and in the process that the rotor 200 rotates relative to the stator, namely, the rotor 200 rotates relative to the winding, the rotor 200 rotating relative to the winding cuts the magnetic induction lines, force for driving the rotor 200 to rotate is generated, and further the operation of the motor is realized.

The stator is a split structure, specifically, the stator includes a plurality of stator laminations 110, the plurality of stator laminations 110 are stacked, the shape and the structure of each stator lamination 110 are the same, and the plurality of stator laminations 110 are stacked, so that the plurality of stator laminations 110 jointly form a main body of the stator. For being overall structure with the stator design, the processing degree of difficulty of the split type stator that constitutes through a plurality of stator punching sheet 110 reduces, also is easily maintained and is changed more. The plurality of stator laminations 110 are coaxially distributed in the axial direction of the stator, and a gap is formed between the plurality of stator laminations 110. The gaps between the plurality of stator laminations 110 can dissipate heat from the windings in the stator. At the motor operation in-process, motor stator can produce a large amount of heats, and this embodiment is through setting up a plurality of stator towards 110 intervals, makes all have the clearance between every two adjacent stator towards 110 in a plurality of stator towards 110, and the heat in every stator towards 110 all can dispel the heat through the clearance promptly, has improved the radiating efficiency of stator.

In the axial direction of the stator, the sum of the thicknesses of the plurality of stator laminations 110 is recorded as L, and the thickness of the stator is recorded as d. It can be understood that the sum of the gaps between the plurality of stator laminations 110 in the stator can be obtained by calculating the difference between the thickness of the stator and the sum of the thicknesses of the plurality of stator laminations 110, specifically, the sum of the gaps between the plurality of stator laminations 110 is denoted as S, where S is d-L.

This embodiment sets up the thickness of stator as being greater than the thickness stack sum of stator punching sheet 110, and L is less than d promptly, can guarantee in the stator that every two adjacent stator punching sheets 110 all are provided with the clearance between to guarantee the radiating effect of stator. The thickness of the stator is set to be less than or equal to 1.5 times of the thickness superposition sum of the stator laminations 110, namely the thickness superposition sum of the stator laminations 110 is ensured to be less than or equal to 0.5 times of the gap sum between the plurality of stator laminations 110, and the problem of low stator strength caused by overlarge gaps among the plurality of stator laminations 110 is solved.

In the correlation technique, the motor can produce a large amount of heats at the operation in-process stator, because the stator is the integral type structure, or the stator punching 110 structure of laminating each other, then lead to the heat in the motor stator difficult heat dissipation to influence the stability of motor operation.

This embodiment is through setting up a plurality of stator punching 110 intervals in the stator, and at the motor operation in-process, dispel the heat through the clearance between a plurality of stator punching 110, has improved the radiating efficiency of the stator of motor, avoids because the winding on the stator is overheated to lead to motor operation trouble. And the numerical relation between the thickness of the stator in the axial direction and the sum of the thicknesses of the stator punching sheets 110 is limited, so that the sufficient strength of the stator is ensured while the heat dissipation efficiency of the stator is improved.

in any of the above embodiments, the number of pole pairs of the rotor 200 is p, the maximum rotation speed of the rotor 200 is n, and p and n satisfy 60 < n/p ≦ 100.

In this embodiment, the number of pole pairs of the rotor 200 is associated with the torque of the motor, but simply limiting the number range of the number of pole pairs to adjust the torque easily causes the displacement of the compressor on which the motor is mounted to fail to meet the standards required for operation. The higher the rotation speed of the rotor 200 is, the larger the displacement of the compressor is, and the larger the pole pair number is, the lower the maximum rotation speed of the rotor 200 is, therefore, the maximum rotation speed of the rotor 200 is related to the pole pair number of the rotor 200, the ratio of the maximum rotation speed of the rotor 200 to the pole pair number of the rotor 200 is limited between 60 and 100, the torque can be reduced under the condition of the same displacement, the operating point of the motor operation is changed, and the efficiency of the motor is improved.

In any of the above embodiments, the number of teeth of the stator is Z, Z and n satisfy, 20 < n/Z ≦ 34.

In this embodiment, the maximum rotation speed of the motor affects the torque of the motor, but simply limiting the maximum rotation speed of the motor is not limited by the number of teeth of the stator, which easily causes a change in the harmonic magnetic field of the motor and affects the efficiency of the motor. Therefore, the number of teeth of the stator and the maximum rotating speed of the rotor 200 are combined, so that the torque can be reduced under the condition of the same displacement, the operating point of the motor is changed, and the efficiency of the motor is improved.

In any of the above embodiments, the rotor 200 is taken along the radial direction of the rotor 200, and the outer contour of the cross section of the rotor 200 is circular.

In this embodiment, the rotor 200 is taken along the radial direction of the rotor 200, the cross section of the rotor 200 in the radial direction may be a regular circle or may not be a regular circle, and a circle passing through the outermost contour of the rotor 200 is set as a contour circle passing through a point or a line where the radial cross section of the rotor 200 is farthest from the center of the circle, the contour circle passing through the axis of the rotor 200, and if the radial cross section of the rotor 200 is a regular circle, the contour circle coincides with the outer edge of the radial cross section of the rotor 200.

Further, the outer contour of the rotor 200 may be circular. It can be understood that, in the working process of the motor, the rotor 200 is in a rotating state, and the outer contour of the rotor 200 is set to be circular, so that the wind abrasion loss generated in the rotating process of the rotor 200 can be effectively reduced, and the working efficiency of the motor is improved.

In any of the above embodiments, the motor further comprises a plurality of flux guide slots. The plurality of flux guide grooves are provided in the rotor 200 so as to penetrate in the axial direction of the motor.

In this embodiment, the rotor 200 is also provided with a plurality of flux guide grooves. Specifically, the rotor 200 is formed by stacking a plurality of rotor sheets 210, and a plurality of flux guide slots are provided on any one of the rotor sheets 210, and the flux guide slots are distributed in the rotor sheets 210 in a penetrating manner along the axial direction of the motor, that is, distributed in the rotor sheets 210 in a penetrating manner along the axial direction of the motor. It is understood that during operation of the machine, radial electromagnetic waves are generated, which cause increased noise. In order to improve the noise problem of the motor, a plurality of magnetic flux guide grooves are arranged on the rotor 200 along the axial direction of the motor in a penetrating way, so that the lowest-order radial electromagnetic force wave of the motor can be reduced, and the noise caused by the radial electromagnetic force wave can be further reduced.

The plurality of magnetic flux guide grooves are formed in the rotor 200 and are distributed on the rotor 200 in a penetrating manner along the axial direction of the motor, so that the lowest-order radial electromagnetic force waves of the motor can be reduced, and the noise caused by the radial electromagnetic force waves is reduced.

The rotor punching sheet 210 is provided with a first magnetic steel groove 211 and a second magnetic steel groove 212, and the rotor 200 further comprises a first magnetic part and a second magnetic part, wherein the first magnetic part and the second magnetic part are respectively installed in the first magnetic steel groove 211 and the second magnetic steel groove 212 to form a pair of magnetic poles.

In any of the above embodiments, the number of the segmented laminations 111 in one stator lamination 110 is M, the number of pole pairs of the rotor 200 is N, where M and N satisfy: 2/3, M is less than or equal to 6, N is less than or equal to 2.

In this embodiment, the number of the segmented laminations 111 in the stator lamination 110, the number of the pairs of the magnetic poles of the rotor 200, and the proportional relationship therebetween all affect the performance of the motor, and in order to ensure that the performance parameters of the motor are within a good range, the number of the segmented laminations 111 in the stator lamination 110, the number of the pairs of the magnetic poles of the rotor 200, and the proportional relationship therebetween are defined.

Specifically, the number of the segmented laminations 111 in one stator lamination 110 is M, the number of magnetic pole pairs of the rotor 200 is N, where M and N satisfy: 2/3, M is less than or equal to 6, N is less than or equal to 2.

The number of the segmented punching sheets 111 in one stator punching sheet 110 is limited to be less than or equal to 6, the number of the magnetic pole pairs of the rotor 200 is less than or equal to 2, and the ratio of the number of the segmented punching sheets 111 in one stator punching sheet 110 to the number of the magnetic pole pairs of the rotor 200 is 2/3, so that the performance of the motor can be ensured to be in a better range, and the motor can meet the use requirement.

In any of the above embodiments, the rated torque of the motor is T1, the inner diameter of the stator lamination 110 is Φ 1, and the torque per unit volume of the rotor 200 is T2, where T1, Φ 1, and T2 satisfy:

5.18×10^-7≤T1×Φ1^-3×T2^-1≤1.17×10^-6，

5kN·m·m^-3≤T2≤45kN·m·m^-3。

in this embodiment, the range of the combined variables among the rated torque of the motor, the inner diameter of the stator lamination 110, and the torque per unit volume of the rotor 200 is defined. It can be understood that a combined variable among the rated torque of the motor, the inner diameter of the stator lamination 110 and the unit volume torque of the rotor 200 affects the output torque of the motor, and the output torque of the motor can meet the requirement of the equipment provided by the motor by limiting the range of the combined variable.

Specifically, the rated torque of the motor is T1, the inner diameter of the stator lamination 110 is Φ 1, and the unit volume torque of the rotor 200 is T2, where T1, Φ 1, and T2 satisfy:

5.18×10^-7≤T1×Φ1^-3×T2^-1≤1.17×10^-6，

5kN·m·m^-3≤T2≤45kN·m·m^-3。

the combined variable of the rated torque of the motor, the inner diameter of the stator punching sheet 110 and the unit volume torque of the rotor 200 is limited to be more than or equal to 5.18 multiplied by 10^-7And is not more than 1.17X 10^-6And the torque per unit volume of the rotor 200 is limited to 5kN m or more^-3And not more than 45kN · m^-3The output torque of the motor can meet the requirements of equipment arranged on the motor.

Example three:

as shown in fig. 1, 2, 3, 4, 5 and 6, a third embodiment of the present invention provides a compressor 300 including: a motor and a compressing part 310, wherein the motor is selected as the motor in the second embodiment.

Specifically, the compression part 310 includes a cylinder 311 and a piston 312, in order to enable the motor to be connected with the compression part 310 and drive the compression part to operate, some connectors are further provided in the compressor 300, specifically including a crankshaft 320, a main bearing 330 and a sub-bearing 340, the motor is connected with the piston 312 through the crankshaft 320 to drive the piston 312 to move in the cylinder 311, and the main bearing 330 and the sub-bearing 340 are provided outside the crankshaft 320 to support and limit the crankshaft 320 so that the crankshaft 320 can normally rotate.

The motor includes a stator assembly including a stator, a rotor 200, and a winding wound on the stator.

Example four:

in a fourth embodiment of the present invention, there is provided an electric appliance including an appliance main body and a compressor 300. The compressor 300 is selected as the compressor 300 in the third embodiment, so that all the beneficial effects of the compressor 300 in the third embodiment are achieved, and no further description is provided herein.

The electrical equipment provided by the embodiment comprises an equipment main body and the compressor 300, wherein the compressor 300 is connected with the equipment main body, and when the electrical equipment runs, the compressor 300 and the equipment main body are cooperatively run together to enable the electrical equipment to run normally.

In some embodiments, the electrical device is an air conditioner, and the compressor 300 is disposed in an outdoor unit of the air conditioner.

It is to be understood that, in the claims, the specification and the drawings of the specification of the present invention, the term "plurality" means two or more, and unless otherwise specifically limited, the terms "upper", "lower" and the like are used in the orientation or positional relationship indicated on the drawings only for the purpose of more conveniently describing the present invention and making the description easier, and are not intended to indicate or imply that the device or element referred to must have the particular orientation, be constructed and operated in the particular orientation described and thus the description should not be construed as limiting the present invention. The terms "connect," "mount," "secure," and the like are to be construed broadly, and for example, "connect" may refer to a fixed connection between multiple objects, a removable connection between multiple objects, or an integral connection; the multiple objects may be directly connected to each other or indirectly connected to each other through an intermediate. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art from the above data specifically.

In the claims, specification, and drawings that follow the present disclosure, the description of the terms "one embodiment," "some embodiments," "specific embodiments," and so forth, means that a particular 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 the claims, specification and drawings of the present invention, schematic representations of the above terms do not necessarily 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.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator, comprising:

the stator punching sheets are connected into at least two iron core sections along the axial direction of the stator, and the adjacent iron core sections are arranged at intervals;

the thickness sum of the plurality of the connected iron core segments is L along the axial direction of the stator, the thickness of the stator is d, L and d meet the requirement, and L is larger than d and is smaller than or equal to 1.5L.

2. The stator according to claim 1, wherein the number of the core segments is a, wherein 2 ≦ a ≦ 4.

3. The stator according to claim 2,

in the axial direction of the stator, the plurality of core segments includes at least two core segments having different thicknesses.

4. The stator according to claim 3,

the plurality of iron core segments comprise a first iron core segment and a second iron core segment, the thickness of the first iron core segment is smaller than that of the second iron core segment, and the first iron core segment is compared with one side, close to a motor outgoing line, of the second iron core segment.

5. The stator of claim 1, further comprising:

and the supporting piece is arranged between two adjacent iron core sections and is a non-magnetic-conduction supporting piece.

6. The stator according to any one of claims 1 to 5, wherein the stator lamination comprises:

a plurality of pieced and connected partitioned punching sheets;

and the connecting piece is arranged between two adjacent segmented punching sheets in the segmented punching sheets connected in a splicing manner.

7. The stator of claim 6, wherein the connector comprises:

the first connecting part is arranged on one edge of the segmented punching sheet extending along the radial direction of the stator punching sheet;

the first connecting portion of one of the blocking punching sheet can be connected with the second connecting portion of the adjacent blocking punching sheet.

8. The stator according to claim 7,

the first connecting portion is configured as a projection and the second connecting portion is configured as a recess adapted to the projection.

9. The stator of claim 7, wherein any of the plurality of segmented laminations comprises:

a tooth portion;

a yoke connected to the tooth, the first connection portion and the second connection portion being provided to the yoke.

10. The stator of claim 9, further comprising:

and the aluminum coil is wound on the tooth part.

11. The stator of claim 9, further comprising:

the slot body is arranged on one side, deviating from the tooth part, of the yoke part.

12. An electric machine, comprising:

a stator assembly comprising a stator according to any one of claims 1 to 11 and windings wound on the stator;

a rotor disposed within the stator.

13. The electric machine of claim 12,

the number of pole pairs of the rotor is p, the maximum rotating speed of the rotor is n, p and n meet the requirement that n/p is more than 60 and less than or equal to 100.

14. The electric machine of claim 12, further comprising:

and a plurality of flux guide grooves which are arranged on the rotor in a penetrating manner along the axial direction of the motor.

15. The electrical machine according to any of the claims 12 to 14,

the rated torque of the motor is T1, the inner diameter of the stator punching sheet is phi 1, the unit volume torque of the rotor is T2, wherein the following requirements are met among T1, phi 1 and T2:

5.18×10-7≤T1×Φ1-3×T2-1≤1.17×10-6，

5kN·m·m-3≤T2≤45kN·m·m-3。

16. a compressor, comprising:

the electric machine of any one of claims 12 to 15; and

and the motor is connected with the compression part.

17. An electrical device, comprising:

an apparatus main body; and

the compressor of claim 16, connected to said equipment body.