CN117424359A - Stator, motor, compressor and electrical equipment - Google Patents
Stator, motor, compressor and electrical equipment Download PDFInfo
- Publication number
- CN117424359A CN117424359A CN202311418868.9A CN202311418868A CN117424359A CN 117424359 A CN117424359 A CN 117424359A CN 202311418868 A CN202311418868 A CN 202311418868A CN 117424359 A CN117424359 A CN 117424359A
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- Prior art keywords
- stator
- welding
- rotor
- punching
- motor
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- 238000004080 punching Methods 0.000 claims abstract description 131
- 238000003466 welding Methods 0.000 claims abstract description 112
- 238000003475 lamination Methods 0.000 claims description 99
- 230000004907 flux Effects 0.000 claims description 19
- 238000004804 winding Methods 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000003313 weakening effect Effects 0.000 abstract description 5
- 230000035699 permeability Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
Classifications
-
- 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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention provides a stator, a motor, a compressor and electrical equipment, wherein the stator comprises: a plurality of stator punching blocks; the stator punching block comprises: the plurality of segmented punching sheets are arranged in a stacked mode along the axial direction of the stator, and are connected to form the stator punching sheet along the circumferential direction of the stator; at least two welding points are arranged at the edge of the stator punching block and are used for connecting two adjacent stator punching blocks; the welding point comprises: the first welding spot is arranged at one edge of the stator punching block; the second welding spot is arranged at the other edge of the stator punching block, and the first welding spot and the second welding spot are distributed in a staggered manner along the axial direction of the stator. The two adjacent stator punching blocks are connected in a spot welding mode, the specific power loss generated by the pulse spot welding is lower, the relative magnetic permeability of a motor sample is higher, the magnetic leakage is reduced, the weakening of a magnetic field is prevented, and the reduction of the motor efficiency is avoided.
Description
The present application is a divisional application of chinese patent application with application number "202111494433.3", titled "stator, motor, compressor and electrical equipment", with application number 2021, 12, 08.
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
The motor can produce the vortex when the during operation, and eddy current loss can cause stator core in the motor to generate heat, and stator core produces the heat loss because of generating heat, leads to the efficiency of motor to reduce easily.
Disclosure of Invention
The present invention aims to solve one of the technical problems existing in the prior art or related technologies.
In a first aspect, the present invention proposes a stator comprising: a plurality of stator punching blocks; the stator punching block comprises: the plurality of segmented punching sheets are stacked along the axial direction of the stator and spliced to form the stator punching sheet along the circumferential direction of the stator; at least two welding points are arranged at the edge of the stator punching block extending along the radial direction, and the welding points are used for connecting the adjacent two stator punching blocks; the welding point comprises: the first welding point is arranged at one edge of the stator punching block extending along the radial direction of the stator; the second welding spot is arranged at the other edge of the stator punching block extending along the radial direction of the stator, and the first welding spot and the second welding spot are distributed in a staggered manner along the axial direction of the stator.
The stator provided by the invention is in a split structure in order to reduce the processing difficulty of the stator and improve the slot filling rate of the motor. The stator includes a plurality of stator laminations. Through setting the stator towards the piece to a plurality of to when processing the stator, only process a plurality of stator towards the piece can, again with a plurality of stator towards piece part assembly stator, compare in processing a complete stator, the degree of difficulty of processing stator towards piece part reduces, thereby has reduced manufacturing cost, and this kind of stator simple structure, the automated production to the stator is realized to the accessible automated production line.
And, design the split type mosaic structure with the stator, be convenient for realize the winding of coil and establish, can be around establishing the back of accomplishing to installing two adjacent piecemeal punching again in the coil, reduce the degree of difficulty of establishing the coil around, consequently can be under the same circumstances of stator size, around establishing more coils, improve the winding number of turns of coil, be favorable to improving the groove full rate of motor. On the basis of not increasing 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.
The adjacent two stator punching blocks are connected in a welding mode, welding points are arranged between the adjacent two stator punching blocks, namely the adjacent two stator punching blocks are connected in a spot welding mode, compared with the mode of connecting and welding, the adjacent two stator punching blocks are connected in a spot welding mode, the specific power loss generated by pulse spot welding is lower, and the relative magnetic permeability of a motor sample is higher.
The plurality of segmented punched sheets are stacked to form the segmented punched sheets, the segmented punched sheets are processed into an integral structure, for example, the plurality of segmented punched sheets can be fixed in the axial direction through rivet pieces, so that welding points do not need to be arranged on each stator punched sheet, for example, the welding points can be arranged on the stator punched sheets of different layers at intervals. When the thickness of the stator punching sheet is smaller, welding points can be arranged on the stator punching sheets of different layers at intervals, and when the thickness of the stator punching sheet is larger, welding points are arranged between every two adjacent partitioned punching sheets in each layer of stator punching sheet.
The first welding spot and the second welding spot are respectively positioned at two sides of the stator punching block, wherein the first welding spot and the second welding spot are distributed in a dislocation way along the axial direction of the stator, so that the block punching sheet is cut along the radial direction of the stator, and the first welding spot and the second welding spot are not in the same section any more. The welding positions on two sides of the stator punching blocks are arranged in a staggered mode, and therefore welding strength of two adjacent stator punching blocks can be effectively improved.
Because the first welding spots and the second welding spots are distributed in a staggered manner, the welding strength of two adjacent stator punching blocks can be improved, so that stronger welding strength can be achieved through fewer welding spots as much as possible, the number of welding spots is reduced as much as possible, eddy current loss in a stator can be further reduced, heat loss of a stator core can be reduced, weakening of a magnetic field is prevented, and reduction of motor efficiency is avoided.
In addition, the stator in the technical scheme provided by the invention can also have the following additional technical characteristics:
in one possible design, the stator lamination further comprises: the first connecting part is arranged at one edge of the segmented punching sheet extending along the radial direction of the stator punching sheet; the second connecting part is arranged at the other edge of the segmented punching sheet extending along the radial direction of the stator punching sheet, and the first connecting part of one segmented punching sheet can be matched with the second connecting part of the adjacent segmented punching sheet.
In this design, a first connection and a second connection are provided on the segmented blank. Specifically, the first connecting portion is disposed at one edge extending along the radial direction of the stator lamination, and the second connecting portion is disposed at the other edge extending along the radial direction of the stator lamination, that is, the first connecting portion and the second connecting portion are disposed at two sides of the segmented lamination along the circumferential direction of the stator lamination. The first connecting part of one segmented punching sheet is matched with the second connecting part of the adjacent other segmented punching sheet, so that the connection of the two segmented punching sheets is realized. The plurality of block punching sheets are arranged along the circumferential direction of the stator, and any two adjacent block punching sheets are matched through the first connecting part and the second connecting part, so that the connection among the plurality of block punching sheets is realized, and the stator is formed by surrounding.
The first connecting part and the second connecting part are arranged on the block punching sheet, so that the connection stability of the adjacent block punching sheets can be improved, and the shaking of the adjacent two block punching sheets is avoided.
In one possible design, a plurality of stator laminations are stacked to form a stator core; along the axial direction of the stator core, the thickness of the stator punching sheet is H1, the thickness of the stator core is H2, at least two welding points are arranged on one edge of the stator core extending along the radial direction of the stator, the distance between every two adjacent welding points along the axial direction of the stator core is D, H1, H2 and D are met, and D/H1 is less than H2/D and less than or equal to H2/H1.
In this design, the following description exemplifies the provision of welds on each layer of stator laminations.
The number of welding points is in positive correlation with the thickness of the stator lamination, and in order to ensure the connection stability of two adjacent segmented lamination, the greater the thickness of the stator lamination is, the greater the number of welding points is, for example, 10 welding points are arranged on 1 stator lamination. However, as the number of stator laminations superimposed increases, the thickness of the stator core increases, and the stability of both ends of the stator core in the axial direction is poor, so that as the thickness of the stator core increases, the number of welding points on each stator lamination also needs to increase. Illustratively, when the number of stator laminations is 5, the number of welds on each stator lamination is 10, and when the number of stator laminations is 10, the number of welds on each stator lamination is 12.
Through limiting the proportional relation of the thickness of the stator punching sheet, the thickness of the stator iron core and the distance between two adjacent welding points, the number of the welding points can be reduced on the basis of ensuring the welding strength, and excessive eddy current loss caused by excessive welding points is avoided.
In one possible design, the first connection part is configured as a projection and the second connection part is configured as a recess adapted to the projection.
In this design, the first connecting portion is configured as a protruding member, and the second connecting portion is configured as a groove, that is, a structure with concave-convex fit between the first connecting portion and the second connecting portion, and the groove is adapted to the protrusion, so as to realize connection fit between the first connecting portion and the second connecting portion.
Through setting up first connecting portion into protruding piece, set up the second connecting portion into with protruding piece 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 one of the plurality of segmented chips comprises: a tooth portion; a yoke part arranged at one side of the tooth part, which is away from the axis of the stator; the yoke part comprises an inner contour section extending along the circumferential direction of the stator punching sheet, the inner contour section comprises a first contour section and a second contour section which are connected, one end of the first contour section is connected with the tooth root of the tooth part, and the other end of the first contour section is connected with the second contour section; the first contour section is a straight line section, and the second contour section is an arc section.
In this design, the yoke is provided with an inner contour segment extending in the circumferential direction of the stator plate towards the inner side of the stator, in particular the inner contour segment starts from the tooth root of the tooth and ends at the edge of the yoke extending radially of the stator plate, the segment plates being provided with inner contour segments on both sides of the tooth, respectively.
Specifically, the inner profile section comprises a first profile section and a second profile section, the first profile section being connected to the second profile section. One end of the first profile section is connected with the tooth root of the tooth part, the other end of the first profile section is connected with the second profile section, one end of the second profile section is connected with the first profile section, and the other end of the second profile section is connected with the yoke part along the edge extending radially of the stator punching sheet. The first contour segment is different from the second contour segment in shape, specifically, the first contour segment is a straight line segment, and the second contour segment is an arc segment.
Because the second contour segment is connected with the edge of the yoke part extending along the radial direction of the stator punching sheet, the part, close to the radial edge, of the inner periphery of the yoke part is of an arc-shaped structure, and therefore when the two adjacent segmented punching sheets are spliced, the splicing part of the two adjacent segmented punching sheets, which is positioned on the inner periphery of the yoke part, is of an arc angle.
If the inner Zhou Jun of the yoke is a straight line segment, when two adjacent block punching sheets are spliced, an included angle is formed at the splicing position of the inner periphery of the yoke, and the width of the yoke at the position of the included angle is thinner, so that the structural stability of the stator punching sheet is poor. When the stator is assembled with other components, the stator punching sheet is easy to be extruded and deformed.
According to the invention, the joint of the adjacent two block punching sheets at the inner periphery of the yoke part is set to be an arc angle, so that the problem of poor structural stability caused by too small width of the yoke part can be effectively avoided, the stator punching sheet is not easy to deform on the basis of ensuring the stator punching sheet structure, and the increase of the loss of the stator core is avoided. Moreover, the stator punching sheet is not easy to deform, and the gap between the stator and the rotor is not easy to change, so that the problem of noise increase is avoided.
In one possible design, the stator is capable of cooperating with the rotor; the length of the first contour segment is L2, the length of the second contour segment is L3, the pole pair number of the rotor is P, and the relation among L2, L3 and P satisfies the following conditions: the ratio of (L2/L3)/P is more than or equal to 0.4 and less than or equal to 1.9.
In this design, when the length of the second profile section is too large, the length of the first profile section is small, and the space of the stator slot is reduced. When the length of the second contour segment is too small, the length of the first contour segment is large, and the yoke portion is in a position with a small width. Therefore, the length ratio of the first contour section to the second contour section needs to be adjusted, and the position of the yoke with smaller width is avoided on the basis of ensuring the space of the stator slot. In addition, the proportion of the first contour section and the second contour section also affects the magnetic density saturation, so that the proportion of the first contour section and the second contour section and the pole pair number of the rotor are combined to limit the ratio of 0.4 (L2/L3)/P to be less than or equal to 1.9, and the problem of magnetic density saturation is avoided.
In one possible design, the stator further comprises: an aluminum coil is wound around the teeth.
In this design, the coil wound around the tooth is defined as a material of aluminum, that is, the coil is formed by winding aluminum wire around the tooth, and the unit price of aluminum wire is low.
In one possible design, the outer diameter of the stator lamination is Φ1, the inner diameter of the stator lamination is Φ2, and the relationship between Φ1 and Φ2 satisfies: 0.63 More than or equal to phi 2/phi 1 more than or equal to 0.48.
In this design, the relationship between the outer diameter and the inner diameter of the stator laminations is further defined. It will be appreciated that the ratio between the inner diameter of the stator laminations and the outer diameter of the stator laminations has a certain effect on the performance of the motor, in particular on the heat dissipation, the magnetic flux density and the overall weight of the motor, and in order to balance the various parameters of the motor, the motor has a high cost performance, and the ratio between the inner diameter of the stator laminations and the outer diameter of the stator laminations is limited within a certain range.
Specifically, the outer diameter of the stator lamination is Φ1, the inner diameter of the stator lamination is Φ2, and the relationship between Φ1 and Φ2 satisfies: 0.63 More than or equal to phi 2/phi 1 more than or equal to 0.48.
The outer diameter of the stator lamination may be 101.15mm and the inner diameter of the stator lamination may be 53.3mm.
The ratio of the inner diameter of the stator punching sheet to the outer diameter of the stator punching sheet is greater than or equal to 0.48 and less than or equal to 0.63 by limiting the ratio range between the inner diameter of the stator punching sheet and the outer diameter of the stator punching sheet, so that each parameter of the motor can reach an ideal range, and the motor has higher cost performance.
In a second aspect, the present invention proposes an electric machine comprising: a stator assembly comprising a stator as in any one of the possible designs of the first aspect and windings wound on the stator; and the rotor is arranged in the stator.
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 the circle passing through the outermost contour of the rotor is set as a contour circle, that is, the contour circle of the radial section of the rotor passes through the point or line of the radial section of the rotor furthest from the center of the circle, and the contour circle passes through the axis of the rotor, and if the radial section of the rotor is a regular circle, the contour circle coincides with the outer edge of the radial section of the rotor.
Further, the outer contour of the rotor may be circular. It can be understood that in the working process of the motor, the rotor is in a rotating state, the outer contour of the rotor is set to be round, 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 motor further comprises: the plurality of 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 rotor punching sheet, and the magnetic flux guide grooves are distributed on the rotor punching sheet in a penetrating manner along the axial direction of the motor, namely in the rotor punching sheet in the penetrating manner along the axial direction of the motor. It will be appreciated that during operation of the motor, radial electromagnetic waves may be generated which may lead to 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 way along the axial direction of the motor, so that radial electromagnetic waves of the lowest order of the motor can be reduced, and the noise caused by the radial electromagnetic waves can be reduced.
By arranging a plurality of magnetic flux guide grooves on the rotor and enabling the magnetic flux guide grooves to be distributed on the rotor in a penetrating manner along the axial direction of the motor, the radial electromagnetic wave of the lowest order of the motor can be reduced, and noise caused by the radial electromagnetic wave can be further reduced.
In one possible design, the rated torque of the motor is T1, the inner diameter of the stator is Φ3, the torque per unit volume of the rotor is T2, wherein the conditions between T1, Φ3 and T2 are:
5.18×10 -7 ≤T1×Φ3 -3 ×T2 -1 ≤1.17×10 -6 ，
5kN·m·m -3 ≤T2≤45kN·m·m -3 。
in this design, the range of the combined variable among the rated torque of the motor, the inner diameter of the stator lamination, and the torque per unit volume of the rotor is defined. It can be understood that the output torque of the motor is influenced by the combined variable among the rated torque of the motor, the inner diameter of the stator punching sheet and the unit volume torque of the rotor, and 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, rated torque of the motor is T1, inner diameter of the stator punching sheet is phi 3, unit volume torque of the rotor is T2, and the following conditions are satisfied among T1, phi 3 and T2:
5.18×10 -7 ≤T1×Φ3 -3 ×T2 -1 ≤1.17×10 -6 ，
5kN·m·m -3 ≤T2≤45kN·m·m -3 。
the combined variable among the rated torque of the motor, the inner diameter of the stator punching sheet and the unit volume torque of the rotor is more than or equal to 5.18 multiplied by 10 -7 And less than or equal to 1.17X10 -6 And defining a torque per unit volume of the rotor to be 5 kN.m.m or more -3 And less than or equal to 45 kN.m.m -3 The output torque of the motor can be made to meet the requirements of the equipment provided by the motor.
In a third aspect, the present invention provides a compressor comprising: a motor as in any one of the possible designs of the second aspect; and the compressing component is connected with the motor.
In a fourth aspect, the present invention proposes an electrical device comprising: an apparatus main body; and a compressor of the third aspect, the compressor being connected to the apparatus body.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 shows a schematic structural view of a stator according to an embodiment of the present invention;
FIG. 2 shows a schematic structural view of a segmented blank of one embodiment of the invention;
FIG. 3 illustrates a schematic structural view of a stator lamination of one embodiment of the present invention;
FIG. 4 shows a schematic structural view of a rotor sheet according to an embodiment of the present invention;
fig. 5 shows a schematic structural view of a compressor according to another embodiment of the present invention.
The correspondence between the reference numerals and the component names in fig. 1 to 5 is:
100 stators, 110 stator punching blocks, 111 tooth parts, 1111 first tooth shoes, 1112 second tooth shoes, 112 yoke parts, 113 first connecting parts, 114 second connecting parts, 115 segmented punching sheets, 120 stator punching sheets, 121 groove bodies, 122 avoiding gaps, 123 first profile sections, 124 second profile sections, 130 welding points, 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-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
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 described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
A stator, a motor, a compressor, and an electric device provided according to some embodiments of the present invention are described below with reference to fig. 1 to 5.
As shown in connection with fig. 1 and 5, in some embodiments of the present invention, a stator 100 is provided, comprising: the stator punching block comprises a plurality of stator punching blocks 110 and at least two welding points 130, wherein the at least two welding points 130 are arranged at the edge of the stator punching block 110 extending along the radial direction of the stator 100, and the welding points 130 are used for connecting two adjacent stator punching blocks 110; the stator punching block 110 includes: a plurality of stacked segmented laminations 115, the plurality of segmented laminations 115 being spliced to form a stator lamination 120 along the circumferential direction of the stator 100; the welding point 130 includes: a first welding spot and a second welding spot, the first welding spot being provided at an edge of the stator block 110 extending in a radial direction; the second welding spot is arranged at the other edge of the stator punching block 110 extending along the radial direction of the stator 100, and the first welding spot and the second welding spot are distributed in a staggered manner along the axial direction of the stator 100.
In order to reduce the processing difficulty of the stator 100 and improve the slot filling rate of the motor, the stator 100 provided by the invention is in a split type structure. The stator 100 includes a plurality of stator laminations 110. Through setting up stator punching 110 into a plurality ofly to when processing stator 100, only processing a plurality of stator punching 110 can, assemble stator 100 with a plurality of stator punching 110 parts again, compare in processing a complete stator 100, the degree of difficulty of processing stator punching 110 part reduces, thereby has reduced manufacturing cost, and this kind of stator 100 simple structure, the automated production to stator 100 is realized to the accessible automated production line.
And, design stator 100 as split type mosaic structure, be convenient for realize the winding of coil and establish, can be around establishing the back and install two adjacent piecemeal punching 115 again, reduce the degree of difficulty of establishing the coil around, consequently can be under the same circumstances of stator 100 size, around establishing more coils, improve the winding number of turns of coil, be favorable to improving the groove full rate of motor. On the basis of not increasing 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.
The adjacent two stator punching blocks 110 are connected in a welding mode, and welding points 130 are arranged between the adjacent two stator punching blocks 110, namely, the adjacent two stator punching blocks 110 are connected in a spot welding mode, compared with the mode of connecting and welding, the adjacent two stator punching blocks 110 are connected in a spot welding mode, the specific power loss generated by pulse spot welding is lower, the relative magnetic permeability of a motor sample is higher, the magnetic leakage is reduced, the eddy current loss in the stator 100 can be reduced, the heat loss of a stator core can be reduced, the weakening of a magnetic field is prevented, and the reduction of the motor efficiency is avoided.
The plurality of segmented sheets 115 are stacked to form the segmented sheet 115, and the segmented sheet 115 has been machined to be a unitary structure, for example, the plurality of segmented sheets 115 may be fixed in an axial direction by a rivet member, so that it may not be necessary to provide the welding points 130 on each of the stator sheets 120, for example, the welding points 130 may be provided at intervals on the stator sheets 120 of different layers. When the thickness of the stator laminations 120 is small, the welding points 130 can be arranged on the stator laminations 120 of different layers at intervals, and when the thickness of the stator laminations 120 is large, the welding points 130 are arranged between two adjacent segmented laminations 115 in each layer of stator laminations 120.
The first welding spot and the second welding spot are respectively located at two sides of the segmented punching sheet 115, wherein the first welding spot and the second welding spot are distributed in a dislocation manner along the axial direction of the stator 100, so that the segmented punching sheet 115 is cut along the radial direction of the stator 100, and the first welding spot and the second welding spot are not in the same section any more. The welding positions on two sides of the block stamping sheets 115 are arranged in a staggered mode, and therefore the welding strength of two adjacent block stamping sheets 115 can be effectively improved.
Because the first welding spots and the second welding spots are distributed in a staggered manner, the welding strength of two adjacent stator punching blocks 110 can be improved, so that stronger welding strength can be achieved through fewer welding spots as much as possible, the welding effect can be achieved by fewer welding spots as much as possible, the number of welding spots can be reduced as much as possible, the eddy current loss in the stator 100 can be further reduced, the heat loss of the stator core can be reduced, the weakening of a magnetic field is prevented, and the reduction of the motor efficiency is avoided.
In one possible application, two adjacent segmented dies 115 are welded using an adaptive pulse laser spot welding technique, which can interrupt the weld and reduce eddy current losses due to continuous welding.
In one possible embodiment, the stator laminations 120 include: a first connecting portion 113 and a second connecting portion 114, the first connecting portion 113 being disposed at an edge of the segmented lamination 115 extending radially along the stator lamination 120; the second connection portion 114 is disposed at the other edge of the segmented lamination 115 extending in the radial direction of the stator lamination 120, and the first connection portion 113 of one segmented lamination 115 can be matched with the second connection portion 114 of an adjacent segmented lamination 115.
In this embodiment, a first connection portion 113 and a second connection portion 114 are provided on the divided punched piece 115. Specifically, the first connection portion 113 is disposed at one edge extending along the radial direction of the stator lamination 120, and the second connection portion 114 is disposed at the other edge extending along the radial direction of the stator lamination 120, that is, the first connection portion 113 and the second connection portion 114 are disposed at two sides of the segmented lamination 115 along the circumferential direction of the stator lamination 120. The first connection portion 113 of one segmented lamination 115 is mated with the second connection portion 114 of the adjacent other segmented lamination 115, thereby achieving connection of the two segmented lamination 115. The plurality of segmented punched pieces 115 are arranged along the circumferential direction of the stator 100, and any two adjacent segmented punched pieces 115 are matched through the first connecting part 113 and the second connecting part 114, so that the plurality of segmented punched pieces 115 are connected, and the stator 100 is formed by surrounding.
The first connecting portion 113 and the second connecting portion 114 are arranged on the segmented punching sheet 115, so that the connection stability of the adjacent segmented punching sheets 115 can be improved, and the adjacent two segmented punching sheets 115 are prevented from shaking.
As shown in connection with fig. 1, 2 and 3, in one possible embodiment, a plurality of stator laminations 120 are stacked to form a stator core; along the axial direction of the stator core, the thickness of the stator punching sheet 120 is H1, the thickness of the stator core is H2, at least two welding points 130 are arranged on one edge of the stator core extending along the radial direction of the stator 100, the distance between every two adjacent welding points 130 along the axial direction of the stator core is D, H1, H2 and D are met, and D/H1 is less than H2/D and less than or equal to H2/H1.
In this embodiment, the following description exemplifies the provision of welds 130 on each layer of stator laminations 120.
The number of the welding points 130 is in positive correlation with the thickness of the stator lamination 120, and in order to ensure the connection stability of the adjacent two segmented lamination 115, the greater the thickness of the stator lamination 120, the greater the number of the welding points 130, for example, 10 welding points 130 on 1 stator lamination 120. However, as the number of stator laminations 120 superimposed increases, the thickness of the stator core increases, and the stability of both ends of the stator core in the axial direction is poor, and therefore, as the thickness of the stator core increases, the number of welding points 130 on each stator lamination 120 also needs to increase. Illustratively, when the number of stator laminations 120 is 5, the number of welds 130 per stator lamination 120 is 10, and when the number of stator laminations 120 is 10, the number of welds 130 per stator lamination 120 is 12.
By limiting the proportional relation of the thickness of the stator lamination 120, the thickness of the stator core and the distance between two adjacent welding points 130, the number of the welding points 130 can be reduced on the basis of ensuring the welding strength, excessive eddy current loss caused by excessive welding points is avoided, the eddy current loss in the stator 100 is further weakened, thereby reducing the heat loss of the stator core, preventing the weakening of the magnetic field and avoiding the reduction of the motor efficiency.
As shown in fig. 2, in one possible embodiment, the first connection portion 113 is configured as a protrusion and the second connection portion 114 is configured as a groove that mates with the protrusion.
In this embodiment, the first connecting portion 113 is configured as a protruding member, and the second connecting portion 114 is configured as a groove, that is, a structure of concave-convex fit between the first connecting portion 113 and the second connecting portion 114, the groove is adapted to the protrusion, so as to achieve connection fit of the first connecting portion 113 and the second connecting portion 114.
Through setting the first connecting portion 113 as the protruding member, set up the second connecting portion 114 as the recess with protruding member matched with, made between first connecting portion 113 and the second connecting portion 114 formed unsmooth matched with structure, promoted the connection reliability, reduced the processing degree of difficulty.
As shown in connection with fig. 2 and 3, in one possible embodiment, any one of the plurality of segmented punches 115 comprises: a tooth 111 and a yoke 112, the yoke 112 being provided on a side of the tooth 111 facing away from the axial center of the stator 100; the yoke 112 includes an inner contour segment extending in the circumferential direction of the stator lamination 120, the inner contour segment including a first contour segment 123 and a second contour segment 124 connected to each other, one end of the first contour segment 123 being connected to the tooth root of the tooth 111, the other end of the first contour segment 123 being connected to the second contour segment 124; wherein the first contour segment 123 is a straight segment, and the second contour segment 124 is an arc segment.
In this embodiment, the yoke 112 is provided with an inner contour section extending in the circumferential direction of the stator plate 120 toward the inside of the stator 100, specifically, the inner contour section starts from the tooth root of the tooth 111 and ends at the edge of the yoke 112 extending in the radial direction of the stator plate 120, and the segmented plate 115 is provided with inner contour sections on both sides of the tooth 111, respectively.
Specifically, the inner profile section includes a first profile section 123 and a second profile section 124, the first profile section 123 being connected to the second profile section 124. One end of the first profile segment 123 is connected to the tooth root of the tooth 111, the other end of the first profile segment 123 is connected to the second profile segment 124, one end of the second profile segment 124 is connected to the first profile segment 123, and the other end of the second profile segment 124 is connected to a side of the yoke 112 extending radially along the stator lamination 120. The first profile section 123 has a different shape from the second profile section 124, specifically, the first profile section 123 is a straight line section and the second profile section 124 is an arc section.
Since the second profile section 124 is connected to the edge of the yoke portion extending in the radial direction of the stator lamination, the inner periphery of the yoke portion 112 has an arc-shaped structure near the radial edge, so that when the two adjacent segmented lamination pieces 115 are spliced, the splice of the two adjacent segmented lamination pieces 115 at the inner periphery of the yoke portion 112 has an arc angle.
If the inner portion Zhou Jun of the yoke portion 112 is a straight line segment, when the two adjacent segmented stamped sheets 115 are spliced, an included angle is formed at the spliced position of the two adjacent segmented stamped sheets 115 at the inner periphery of the yoke portion 112, and the width of the yoke portion 112 at the included angle position is thinner, so that the structural stability of the stator stamped sheet 120 is poor. The stator laminations 120 are easily deformed by compression when the stator is assembled with other components.
In the invention, the joint of the two adjacent block punching sheets 115 at the inner periphery of the yoke 112 is set to be an arc angle, so that the problem of poor structural stability caused by too small width of the yoke 112 can be effectively avoided, and the stator punching sheet 120 is not easy to deform on the basis of ensuring the structure of the stator punching sheet 120, and the increase of the loss of a stator core is avoided. Moreover, since the stator lamination 120 is not easily deformed, the gap between the stator and the rotor is not easily changed, thereby avoiding the problem of noise increase.
In one possible embodiment, the stator is capable of cooperating with the rotor; the first contour segment 123 has a length L2, the second contour segment 124 has a length L3, and the pole pair number of the rotor has a number P, wherein the relationship of L2, L3, and P satisfies: the ratio of (L2/L3)/P is more than or equal to 0.4 and less than or equal to 1.9.
In this embodiment, when the length of the second profile section 124 is too large, the length of the first profile section 123 is small, and the space of the stator slot is reduced. When the length of the second profile section 124 is too small, the length of the first profile section 123 is large, and a position where the width of the yoke 112 is small occurs. It is therefore necessary to adjust the length ratio of the first profile section 123 and the second profile section 124, and on the basis of ensuring the stator slot space, the yoke 112 is prevented from being located at a position where the width is small. In addition, the ratio of the first profile section 123 to the second profile section 124 also affects the magnetic flux density saturation, so that the ratio of the first profile section 123 to the second profile section 124 and the pole pair number of the rotor are combined to limit 0.4 (L2/L3)/P to 1.9, thereby avoiding the problem of magnetic flux density saturation.
As shown in fig. 2, in one possible embodiment, a groove 121 is disposed on a side of the yoke 112 facing away from the tooth 111, that is, the outer periphery of the stator 100 is provided with the groove 121, and the groove 121 can increase the space between the stator 100 and other components located on the outer periphery side of the stator 100, so as to facilitate oil return of the compressor 300, improve smoothness of oil return, and facilitate operation stability of the compressor 300.
A large number of coils are usually wound in the stator slot, so that the space for oil to circulate in the stator slot is smaller, and the circulating area of oil return can be increased by opening the slot body 121 on the stator 100.
The tank 121 includes a trapezoidal groove. The trapezoidal groove 121 is convenient to clamp with the tooling, so that the tooling can drive the plurality of block stamping 115 to move. In the winding process, the plurality of segmented punched pieces 115 are distributed in a straight line, and after the winding is completed, the tooling drives the plurality of segmented punched pieces 115 to enclose to form a stator punching block 120. Setting the slot 121 as a trapezoidal slot can improve the convenience of the tooling to drive the segmented stamping 115 to move.
In one possible application, the other slots 121 of the plurality of slots 121, except for the trapezoidal slots, are rectangular. By arranging at least one of the groove bodies 121 as a rectangular groove, the rectangular groove can be used as an identification groove, and positioning of the motor can be achieved through the identification groove, so that assembly of the motor to the compressor is facilitated.
In one possible embodiment, the yoke 112 is taken along a radial direction of the stator plate 120, and the slot 121 passes through a center line of a cross section of the yoke 112.
In this embodiment, the groove 121 passes through the center line of the yoke 112, which can further improve the oil return effect, and improve the smoothness of the oil return, which is beneficial to improving the operation stability of the compressor 300.
In one possible embodiment, the stator 100 further includes: aluminum coils wound around the teeth 111.
In this embodiment, the coil wound around the tooth 111 is made of aluminum, that is, the coil is formed by winding aluminum wire around the tooth 111, the unit price of aluminum wire is low, and the use of aluminum wire as the coil can reduce the material cost of the motor in large part.
As shown in connection with fig. 2 and 3, in one possible embodiment, the outer diameter of the stator lamination 120 is Φ1, the inner diameter of the stator lamination 120 is Φ2, and the relationship between Φ1 and Φ2 satisfies: 0.63 More than or equal to phi 2/phi 1 more than or equal to 0.48.
In this embodiment, the relationship between the outer diameter and the inner diameter of the stator laminations 120 is further defined. It will be appreciated that the ratio between the inner diameter of the stator laminations 120 and the outer diameter of the stator laminations 120 has an effect on the performance of the motor, and in particular, on the heat dissipation, the magnetic flux density and the overall weight of the motor, and in order to balance the various parameters of the motor, to provide a high cost performance of the motor, the ratio between the inner diameter of the stator laminations 120 and the outer diameter of the stator laminations 120 is limited to a certain range.
Specifically, the outer diameter of the stator lamination 120 is Φ1, the inner diameter of the stator lamination 120 is Φ2, and the relationship between Φ1 and Φ2 satisfies: 0.63 More than or equal to phi 2/phi 1 more than or equal to 0.48.
The outer diameter of the stator laminations 120 can be 101.15mm and the inner diameter of the stator laminations 120 can be 53.3mm.
By limiting the range of the ratio between the inner diameter of the stator lamination 120 and the outer diameter of the stator lamination 120, the ratio between the inner diameter of the stator lamination 120 and the outer diameter of the stator lamination 120 is greater than or equal to 0.48 and less than or equal to 0.63, so that each parameter of the motor can reach an ideal range, and the motor has higher cost performance.
As shown in fig. 5, in some embodiments of the present invention, there is provided a motor including: a stator assembly and a rotor 200, wherein the stator assembly comprises a stator 100 as in any one of the possible embodiments described above and windings wound on the stator 100; the rotor 200 is disposed within the stator 100.
The motor thus has all of the benefits of the stator 100 provided by any of the possible embodiments described above.
The stator 100 is internally provided with a stator slot, the rotor 200 is arranged in the stator slot, specifically, the stator 100 and the rotor 200 are arranged in a through shaft manner, and the rotor 200 can rotate relative to the stator 100. Further, windings are further provided on the stator 100, specifically, the windings are provided on the teeth of the stator 100. The stator 100 includes stator laminations 120 stacked together, the stator laminations 120 are provided with a plurality of teeth 111, and the teeth 111 of the stator laminations 120 are stacked together to form a plurality of stator teeth 100. The stator 100 teeth are provided on the inner side of the stator 100 toward the rotor 200. The coils are wound on the teeth of the stator 100 to form windings, and the windings are used for generating magnetic induction wires in an energized state, so that the rotor 200 cuts the magnetic induction wires in the rotating process relative to the stator 100, namely, the rotor 200 rotates relative to the windings, the force for driving the rotor 200 to rotate is generated, and the operation of the motor is further realized.
As shown in connection with fig. 2 and 5, in one possible embodiment, the segmented stamping 115 further comprises: the avoidance gap 122, the avoidance gap 122 is disposed on the surface of the tooth 111 facing the rotor 200, and the distance between the avoidance gap 122 and the first tooth shoe 1111 of the tooth 111 is smaller than the distance between the avoidance gap 122 and the second tooth shoe 1112 of the tooth 111, wherein, along the rotation direction of the rotor 200, the rotor 200 sequentially passes through the first tooth shoe 1111 and the second tooth shoe 1112.
In this embodiment, the stator 100 further includes a relief notch 122, and the relief notch 122 is provided on the surface of the tooth 111 for facing the rotor 200. The tooth 111 includes a first tooth shoe 1111 and a second tooth shoe 1112, and the rotor 200 passes through the first tooth shoe 1111 and the second tooth shoe 1112 in this order in the rotational direction of the rotor 200. The distance between the relief notch 122 and the first tooth shoe 1111 is smaller than the distance between the relief notch 122 and the second tooth shoe 1112, i.e., the relief notch 122 is closer to the first tooth shoe 1111.
By providing the avoidance notch 122 on the surface of the tooth 111 facing the rotor 200, the protruding member on the rotor 200 can be avoided through the avoidance notch 122 in the process of assembling the stator 100 and the rotor 200, and assembly interference is avoided.
Specifically, the avoidance notch 122 is arranged on the stator 100, so that the space phase of the air gap permeance of the stator 100 and the rotor 200 can be effectively adjusted, the phase of the first-order permeance tooth harmonic of the magnetic field is changed, and the first-order permeance tooth harmonic and the armature magnetic potential harmonic are mutually offset, thereby remarkably reducing the radial electromagnetic force of the motor and being beneficial to reducing the noise during the operation of the motor.
In one possible embodiment, the rotor 200 is taken along a radial direction of the rotor 200, and the outer profile 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, and the cross section of the rotor 200 in the radial direction may 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, that is, a point or line where the contour circle of the radial section of the rotor 200 passes through the center of the circle farthest from the radial section of the rotor 200, and the contour circle passes through the axis of the rotor 200, and if the radial section of the rotor 200 is a regular circle, the contour circle coincides with the outer edge of the radial section of the rotor 200.
Further, the outer profile of the rotor 200 may be circular. It can be appreciated 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.
As shown in connection with fig. 4 and 5, in one possible embodiment, the motor further comprises: the plurality of magnetic flux guide grooves penetrate through the rotor 200 in the axial direction of the motor.
In this embodiment, a plurality of flux guide slots are also provided on the rotor 200. Specifically, the rotor 200 is formed by stacking a plurality of rotor punching sheets 210, and a plurality of magnetic flux guiding grooves are disposed on any rotor punching sheet 210, and the magnetic flux guiding grooves are distributed on the rotor punching sheet 210 in a penetrating manner along the axial direction of the motor, that is, are distributed on the rotor punching sheet 210 in a penetrating manner along the axial direction of the motor. It will be appreciated that during operation of the motor, radial electromagnetic waves may be generated which may lead to increased noise. In order to improve noise of the motor, a plurality of magnetic flux guide grooves are formed in the rotor 200 in the axial direction of the motor, so that radial electromagnetic waves of the lowest order of the motor can be reduced, and noise caused by the radial electromagnetic waves can be reduced.
By providing a plurality of magnetic flux guide grooves in the rotor 200 and allowing the magnetic flux guide grooves to pass through and be distributed in the rotor 200 in the axial direction of the motor, the radial electromagnetic wave of the lowest order of the motor can be reduced, and noise caused by the radial electromagnetic wave can be reduced.
The rotor punching sheet 210 is provided with a first magnetic steel groove 211 and a second magnetic steel groove 212, the rotor 200 further comprises a first magnetic part and a second magnetic part, and 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 one possible embodiment, the rated torque of the motor is T1, the inner diameter of the stator 100 is Φ3, and the torque per unit volume of the rotor 200 is T2, wherein T1, Φ3, and T2 satisfy:
5.18×10 -7 ≤T1×Φ3 -3 ×T2 -1 ≤1.17×10 -6 ，
5kN·m·m -3 ≤T2≤45kN·m·m -3 。
in this embodiment, the range of the combination variable among the rated torque of the motor, the inner diameter of the stator lamination 120, and the torque per unit volume of the rotor 200 is defined. As will be appreciated, the combined variable among the rated torque of the motor, the inner diameter of the stator laminations 120 and the unit volume torque of the rotor 200 affects the output torque of the motor, and by limiting the range of the combined variable, the output torque of the motor can be made to meet the requirements of the equipment in which the motor is installed.
Specifically, the rated torque of the motor is T1, the inner diameter of the stator lamination 120 is Φ3, and the torque per unit volume of the rotor 200 is T2, wherein T1, Φ3, and T2 satisfy the following conditions:
5.18×10 -7 ≤T1×Φ3 -3 ×T2 -1 ≤1.17×10 -6 ，
5kN·m·m -3 ≤T2≤45kN·m·m -3 。
by defining the rated torque of the motor, the inner diameter of the stator laminations 120, and the torque per unit volume of the rotor 200The combination variable among them is more than or equal to 5.18×10 -7 And less than or equal to 1.17X10 -6 And a torque per unit volume of the rotor 200 is limited to 5 kN.m.m.or more -3 And less than or equal to 45 kN.m.m -3 The output torque of the motor can be made to meet the requirements of the equipment provided by the motor.
As shown in fig. 5, in an embodiment of the present invention, there is provided a compressor 300, the compressor 300 including: compression member 310 and the motor of any of the possible embodiments described above, the motor being coupled to compression member 310.
Specifically, the compression part 310 includes a cylinder 311 and a piston 312, and in order to enable a motor to be connected with the compression part 310 and drive the compression part 310 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 play a supporting and limiting role on the crankshaft 320, so that the crankshaft 320 can normally rotate.
The compressor 300 according to the present embodiment includes the motor according to the above embodiment, and thus the compressor 300 has all the advantages of the motor according to any one of the above possible embodiments.
In an embodiment of the present invention, an electrical apparatus is provided, including: the apparatus main body and the compressor in the above embodiments, the compressor is connected to the apparatus main body.
The electrical equipment provided by the embodiment comprises an equipment main body and a compressor, wherein the compressor is connected with the equipment main body, and the compressor and the equipment main body are operated together in a matched mode when the electrical equipment is operated so that the electrical equipment can be operated normally.
In the present invention, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean 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 invention. In this specification, 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 description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A stator, comprising:
a plurality of stator punching blocks;
the stator punching block includes: the plurality of block punching sheets are arranged in a stacked mode, and are spliced to form a stator punching sheet along the circumferential direction of the stator;
the welding points are arranged at the edges extending along the radial direction in the stator punching blocks, and are respectively positioned at two sides of the stator punching blocks and are used for connecting two adjacent stator punching blocks;
The welding point includes:
the first welding point is arranged at one edge of the stator punching block extending along the radial direction of the stator;
the second welding spots are arranged at the other edge of the stator punching block extending along the radial direction of the stator, the first welding spots and the second welding spots are respectively positioned at two sides of the stator punching block, and the first welding spots and the second welding spots are distributed in a dislocation manner along the axial direction of the stator;
and welding two adjacent block punching sheets by adopting self-adaptive pulse laser spot welding.
2. The stator as claimed in claim 1, wherein,
a plurality of stator punching sheets are stacked to form a stator core;
the thickness of the stator punching sheet is H1 along the axial direction of the stator core, and the thickness of the stator core is H2;
the stator core is provided with at least two welding points along one edge extending along the radial direction of the stator, the distance between every two adjacent welding points along the axial direction of the stator core is D, H1, H2 and D are met, and D/H1 is less than H2/D and less than or equal to H2/H1.
3. The stator of claim 1, wherein the stator laminations comprise:
the first connecting part is arranged at one edge of the segmented punching sheet extending along the radial direction of the stator punching sheet;
The second connecting part is arranged at the other edge of the segmented punching sheet extending along the radial direction of the stator punching sheet, and the first connecting part of one segmented punching sheet can be matched with the second connecting part of the adjacent segmented punching sheet;
the welding points are arranged on the stator punching sheets of different layers at intervals, and/or the welding points are arranged between two adjacent partitioned punching sheets in the stator punching sheets.
4. The stator of claim 2, wherein the segmented lamination comprises:
a tooth portion;
a yoke portion provided on a side of the tooth portion facing away from an axial center of the stator;
the yoke comprises an inner contour segment extending along the circumferential direction of the stator lamination, the inner contour segment comprises a first contour segment and a second contour segment which are connected, one end of the first contour segment is connected with the tooth root of the tooth part, and the other end of the first contour segment is connected with the second contour segment;
the first contour segment is a straight line segment, and the second contour segment is an arc segment.
5. The stator of claim 4, wherein the stator is capable of cooperating with a rotor;
the length of the first contour segment is L2, the length of the second contour segment is L3, and the pole pair number of the rotor is P, wherein the relation among L2, L3 and P satisfies the following conditions: the ratio of (L2/L3)/P is more than or equal to 0.4 and less than or equal to 1.9.
6. The stator of claim 4, further comprising:
and an aluminum coil wound around the tooth portion.
7. The stator as claimed in claim 2, wherein,
the outer diameter of the stator punching sheet is phi 1, the inner diameter of the stator punching sheet is phi 2, and the relation between phi 1 and phi 2 satisfies the following conditions: 0.63 More than or equal to phi 2/phi 1 more than or equal to 0.48.
8. An electric machine, the electric machine comprising:
a stator assembly comprising the stator of any one of claims 1 to 7 and a winding wound on the stator;
and the rotor is arranged in the stator.
9. The motor of claim 8, wherein the motor is configured to control the motor,
the rotor is taken along the radial direction of the rotor, and the outer contour of the section of the rotor is circular.
10. The electric machine of claim 8, further comprising:
the plurality of magnetic flux guide grooves penetrate through the rotor along the axial direction of the motor.
11. The electric machine according to any one of claims 8 to 10, characterized in that the rated torque of the electric machine is T1, the inner diameter of the stator is Φ3, the torque per unit volume of the rotor is T2, wherein between T1, Φ3 and T2:
5.18×10 -7 ≤T1×Φ3 -3 ×T2 -1 ≤1.17×10 -6 ，
5kN·m·m -3 ≤T2≤45kN·m·m -3 。
12. A compressor, comprising:
the electric machine of any one of claims 8 to 11; and
and the motor is connected with the compression part.
13. An electrical device, comprising:
an apparatus main body; and
the compressor of claim 12, wherein said compressor is coupled to said apparatus body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311418868.9A CN117424359A (en) | 2021-12-08 | 2021-12-08 | Stator, motor, compressor and electrical equipment |
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| CN202111494433.3A CN114069909A (en) | 2021-12-08 | 2021-12-08 | Stator, motor, compressor and electrical equipment |
| CN202311418868.9A CN117424359A (en) | 2021-12-08 | 2021-12-08 | Stator, motor, compressor and electrical equipment |
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| CN202311418868.9A Pending CN117424359A (en) | 2021-12-08 | 2021-12-08 | Stator, motor, compressor and electrical equipment |
| CN202311419034.XA Pending CN117424360A (en) | 2021-12-08 | 2021-12-08 | Stator, motor, compressor and electrical equipment |
| CN202311418759.7A Pending CN117424358A (en) | 2021-12-08 | 2021-12-08 | Stator, motor, compressor and electrical equipment |
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| CN114069909A (en) * | 2021-12-08 | 2022-02-18 | 安徽美芝精密制造有限公司 | Stator, motor, compressor and electrical equipment |
| CN114094731B (en) * | 2021-12-08 | 2023-03-14 | 安徽美芝精密制造有限公司 | Stator, motor, compressor and electrical equipment |
| CN114629258A (en) * | 2022-03-16 | 2022-06-14 | 安徽美芝精密制造有限公司 | Stator core, stator, motor, compressor and electrical equipment |
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| CN112152338A (en) * | 2019-06-28 | 2020-12-29 | 广东美的环境电器制造有限公司 | Motor stator, motor with same and manufacturing method of motor stator |
| CN111181260A (en) * | 2020-02-27 | 2020-05-19 | 菲仕绿能科技(宁波)有限公司 | Permanent magnet synchronous motor stator core split punching sheet, stator core and assembling method |
| CN112467897A (en) * | 2020-11-30 | 2021-03-09 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
| CN214412426U (en) * | 2021-01-25 | 2021-10-15 | 江阴市鑫志冲件有限公司 | High-efficiency motor stator and rotor punching sheet |
| CN214314758U (en) * | 2021-01-27 | 2021-09-28 | 安徽威灵汽车部件有限公司 | Stator core, stator, motor, electric power steering system and vehicle |
| CN114069909A (en) * | 2021-12-08 | 2022-02-18 | 安徽美芝精密制造有限公司 | Stator, motor, compressor and electrical equipment |
-
2021
- 2021-12-08 CN CN202111494433.3A patent/CN114069909A/en active Pending
- 2021-12-08 CN CN202311418868.9A patent/CN117424359A/en active Pending
- 2021-12-08 CN CN202311419034.XA patent/CN117424360A/en active Pending
- 2021-12-08 CN CN202311418759.7A patent/CN117424358A/en active Pending
-
2022
- 2022-11-03 WO PCT/CN2022/129641 patent/WO2023103666A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN114069909A (en) | 2022-02-18 |
| CN117424358A (en) | 2024-01-19 |
| CN117424360A (en) | 2024-01-19 |
| WO2023103666A1 (en) | 2023-06-15 |
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