CN114069905B

CN114069905B - Stator, motor, compressor and electrical equipment

Info

Publication number: CN114069905B
Application number: CN202111492895.1A
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: 2024-06-07
Anticipated expiration: 2041-12-08
Also published as: CN114069905A

Abstract

The invention provides a stator, a motor, a compressor and electrical equipment. The stator includes: the stator punching sheets comprise a plurality of split punching sheets which can be connected in a split manner; any one of the plurality of segmented chips comprises: a tooth portion; the yoke part is connected with the tooth part, at most two connecting pieces are arranged on the first surface of the yoke part, at most two matching pieces are arranged on the second surface of the yoke part, and the connecting pieces and the matching pieces are arranged in a one-to-one correspondence manner; wherein at most two connecting pieces of one segmented punching sheet can be respectively inserted into corresponding two matching pieces of another segmented punching sheet adjacent to the stator in the axial direction so as to connect the plurality of segmented punching sheets in the axial direction; the outer diameter of the stator punching sheet is phi 1, the thickness of the yoke part is L1, and the distance from the center of the connecting piece to the center of the stator punching sheet is H1, wherein H1 satisfies the following conditions: 0.5× (Φ1-L1) < H1< Φ1/2.

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

A segmented motor stator is typically comprised of a plurality of segmented stator laminations stacked together. In the prior art, a plurality of segmented stator punching sheets are usually fixed through connecting pieces on a shell or a bracket of the motor, but the problem of large loss between the segmented stator punching sheets still exists in the fixing mode, so that the operation performance of the motor is affected.

Disclosure of Invention

The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

In view of this, a first aspect of the present invention proposes a stator comprising: the stator punching sheets comprise a plurality of split punching sheets which can be connected in a split manner; any one of the plurality of segmented chips comprises: a tooth portion; the yoke part is connected with the tooth part, at most two connecting pieces are arranged on the first surface of the yoke part, at most two matching pieces are arranged on the second surface of the yoke part, and the connecting pieces and the matching pieces are arranged in a one-to-one correspondence manner; wherein at most two connecting pieces of one segmented lamination can be respectively inserted into at most two matching pieces of another segmented lamination adjacent to each other in the axial direction of the stator so as to connect the plurality of segmented laminations in the axial direction; the distance from the center of any one of the at most two connectors to the outer edge of the stator lamination is less than the distance from the center of the connector to the inner edge of the stator lamination.

The stator provided by the invention is of a split structure, and specifically comprises a plurality of stator punching sheets, wherein the plurality of stator punching sheets are stacked, the shape and the structure of each stator punching sheet are the same, and the plurality of stator punching sheets are stacked, so that the plurality of stator punching sheets jointly form a main body of the stator. Compared with the stator designed into an integral structure, the split stator formed by a plurality of stator punching sheets has the advantages that the processing difficulty is reduced, and the maintenance and the replacement are easier.

In order to further reduce the processing difficulty of the stator core and improve the slot filling rate of the motor, the stator punching sheet is also arranged to be of a split type structure. The stator punching sheet comprises a plurality of block punching sheets which are connected in a split way. Specifically, a plurality of block punching sheets are connected end to end, and are spliced together along the circumferential direction to form the stator punching sheet. A connecting device can be arranged between two adjacent segmented punching sheets, the two segmented punching sheets can be connected in a jogged mode, and a connecting structure can be arranged at the end portions of the segmented punching sheets so as to realize connection and separation between the two segmented punching sheets. Through setting up the piecemeal towards the piece into the structure that can splice each other and connect to when processing the stator towards the piece, only process a plurality of piecemeal towards the piece can, assemble into the stator towards the piece with a plurality of piecemeal towards the piece part again, compare in processing a complete stator towards the piece, the degree of difficulty of processing the piecemeal towards the piece part reduces, thereby reduced manufacturing cost, this kind of stator simple structure, the automated production to the stator is realized to the accessible automated production line, and, designs the stator into split type mosaic structure, be favorable to improving the groove full rate of motor.

The shape and structure of each of the divided stator laminations are the same, and one of the divided stator laminations is described as an example.

The segmented stator laminations include teeth and yokes, wherein the yokes are coupled to the teeth. In the state that a plurality of segmented stators are spliced into stator punching sheets, the yoke part is arranged on one side close to the outer edge of the stator punching sheets, and the tooth part is arranged on one side close to the inner edge of the stator punching sheets. The tooth parts in the plurality of stacked segmented punching sheets jointly form stator teeth, and the stator teeth are used for winding windings.

Further, in order to achieve connection between the plurality of stacked divided punched pieces, at most two connection pieces are provided on the first face of the yoke portion, and at most two mating pieces are provided on the second face of the yoke portion. Specifically, the first face of the yoke and the second face of the yoke face away from each other, and in the case where a plurality of segmented chips are stacked, the first face of the yoke of one segmented chip is opposed to the second face of the yoke of another segmented chip adjacent thereto. Further, the connecting piece is matched with the matching piece, and one connecting piece of one segmented punching sheet can be inserted into one matching piece of the other segmented punching sheet adjacent to the stator in the axial direction, so that the connection of the two segmented punching sheets adjacent to the stator in the axial direction is realized, and the connection of the stator punching sheets arranged in a laminated mode is further realized.

Further, in order to further improve the firmness of connection between the plurality of stacked partitioned punched sheets, the partitioned punched sheets are prevented from being partitioned in the working process, the number of the connecting pieces and the number of the matching pieces are at least two, the number of the connecting pieces and the number of the matching pieces are the same, and the connecting pieces and the matching pieces are in one-to-one correspondence.

It can be appreciated that the present application improves the reliability and stability of the connection of stator laminations to each other by providing at least two fixation points, i.e., at most two connectors and at most two mating members, on the segmented laminations relative to a fixed point. The stator punching sheet that the range upon range of setting is under at most two connecting pieces and at most two cooperation pieces one-to-one under the complex effect, has realized the multiple spot location, makes unable relative rotation appear between two stator punching sheets to avoided the piecemeal phenomenon that the piecemeal punching sheet probably appears in the course of the work, promoted the holistic stability of stator.

Further, the connecting piece and the central line of the corresponding matching piece in the axial direction are collinear, and the connecting piece is matched with the matching piece. Therefore, under the condition that a plurality of segmented punching sheets are stacked along the axial direction of the stator, the connecting piece on the segmented punching sheet can be inserted into the matching piece of the adjacent segmented punching sheet along the axial direction, and the connection mode realizes the interconnection of the plurality of stacked segmented punching sheets.

Further, the setting position of the connection member is defined. The distance from the center of the connector to the outer edge of the stator lamination is less than the distance from the center of the connector to the inner edge of the stator lamination, i.e., the center of the connector is closer to the side of the outer edge of the stator lamination.

The connecting piece is arranged on the segmented punching sheet, the surface of the segmented punching sheet at the position of the connecting piece is deformed, eddy current is easily formed, and eddy current loss is further caused. The magnetic lines of force at different positions of the segmented punched sheet have different densities, and it can be understood that the lower the magnetic density of the position of the connecting piece is, the smaller the eddy current loss caused by the magnetic density is, so that the eddy current loss can be reduced by adjusting the position of the connecting piece. Specifically, the magnetic density of the motor near the outer side of the stator is relatively low, namely, the magnetic density of the stator punching sheet near the outer edge is low, so that the connecting piece is arranged on one side closer to the outer edge of the stator punching sheet, and the eddy current loss caused by the arrangement of the connecting piece can be effectively reduced.

Further, since the eddy current loss is caused by the eddy current formed due to the provision of the connection members, it is understood that the larger the number of connection members, the larger the eddy current loss caused. Therefore, the invention reduces the number of the connecting pieces, and reduces the number of the connecting pieces on the premise of ensuring the stability of the stator, thereby effectively reducing the eddy current loss.

Through the stator design for by the stator punching subassembly of a plurality of range upon range of settings to with the structural design of stator punching for including a plurality of piecemeal connection's piecemeal punching, thereby reduced the processing degree of difficulty of stator, reduction in production cost, this kind of stator structure easily processes, and the automated production of stator is realized to the accessible automated production line, further reduces manufacturing cost through automated production, improves production efficiency. Further, the stator is designed into a split type splicing structure, so that the groove filling rate of the motor is improved. Through set up at most two connecting pieces and at most two cooperation pieces respectively on the first face and the second face of yoke for two adjacent piecemeal towards piece accessible connecting piece along stator axial realize interconnect with the cooperation of cooperation piece, and then make a plurality of stator towards pieces that range upon range of setting can interconnect. And the multi-point positioning among the plurality of stator punching sheets is realized by the connecting mode, so that the relative rotation between the two stator punching sheets cannot occur, the possible occurrence of the slicing phenomenon of the slicing punching sheets in the working process is avoided, and the overall stability of the stator is improved. The distance from the center of the connecting piece to the outer edge of the stator punching sheet is smaller than the distance from the center of the connecting piece to the inner edge of the stator punching sheet, and the connecting piece can be arranged in a region with lower magnetic tight offset, so that eddy current loss caused by the arrangement of the connecting piece is effectively reduced.

In addition, the stator in the technical scheme provided by the invention can also have the following additional technical characteristics:

In the above solution, further, any one of the at most two connectors is configured as a protrusion, and any one of the at most two mating members is configured as a recess adapted to the protrusion.

In this solution, the connecting elements are configured as projections and the mating elements are configured as recesses, so that the connecting element mating elements are connected by means of a male-female fit. Specifically, the protruding piece is in interference fit with the groove, and after the protruding piece is inserted into the groove, the inner wall of the groove extrudes the outer wall of the protruding piece, so that a certain interaction force is generated between the protruding piece and the groove, and the two mutually connected partitioned stamping pieces are prevented from being separated.

Wherein, connecting piece and cooperation piece can be integrated into one piece structure, specifically, set up the protrusion piece as hollow structure, hollow cavity constitutes the recess in the protrusion piece.

Through constructing the connecting piece into protruding piece, construct the fitting piece into the recess to form unsmooth matched structure between connecting piece and the fitting piece, this kind of connection structure easily assembles, connects reliably, has promoted the assembly efficiency of stator.

The distance from the center of the connecting piece to the outer edge of the stator punching sheet is smaller than the distance from the center of the connecting piece to the inner edge of the stator punching sheet, and the connecting piece can be arranged in a region with lower magnetic tight offset, so that eddy current loss caused by the arrangement of the connecting piece is effectively reduced.

In the above technical scheme, further, the outer diameter of the stator punching is Φ1, the thickness of the yoke is L1, and the distance from the center of the connecting piece to the center of the stator punching is H1, where H1 satisfies: 0.5× (Φ1-L1) < H1< Φ1/2.

In this technical solution, the area where the first connecting piece is disposed is further defined, and the location area where the center of the first connecting piece is located is specifically defined according to the outer diameter of the stator lamination and the thickness of the yoke portion. Specifically, the outer diameter of the stator lamination is Φ1, the thickness of the yoke part is L1, and the distance from the center of the first connecting piece to the center of the stator lamination is H1, wherein H1 satisfies: 0.5× (Φ1-L1) < H1< Φ1/2.

The stator lamination is fixedly arranged, but a rotor which rotates can be arranged in the stator lamination, and the rotation center of the rotor can be understood as the center of the stator lamination.

The position area where the center of the first connecting piece is located is limited through the outer diameter size of the stator punching sheet and the thickness size of the yoke part, so that the position of the first connecting piece can be more accurately limited, and the processing operation of the first connecting piece is facilitated. And, limiting the distance from the center of the first connecting piece to the center of the stator punching sheet to be H1 to be 0.5× (phi 1-L1) < H1< phi 1/2, enabling the center of the first connecting piece to be close to one side of the outer edge of the stator punching sheet, and arranging the first connecting piece in a region with low magnetic density in a abutted mode, so that eddy current loss caused by arranging the first connecting piece is effectively reduced.

In any of the above solutions, further, the yoke portion includes an inner contour segment extending along a circumferential direction of the stator lamination, the inner contour segment includes a first contour segment and a second contour segment connected to each other, one end of the first contour segment is connected to a tooth root of the tooth portion, and the other end of the first contour segment is connected to the second contour segment; the first contour section is a straight line section, and the second contour section is an arc section.

In this solution, the inner side of the yoke facing the stator is provided with an inner contour segment extending in the circumferential direction of the stator punching, 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 punching, and the segment punching is 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.

The inner contour section is set to be a contour formed by the first contour section of the straight line section and the second contour section of the arc section, so that the size of the yoke part is limited, and the magnetic flux density saturation is avoided.

In any of the above technical solutions, further, the stator can work in cooperation 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 technical solution, when the length of the second contour segment is too large, the length of the first contour segment is smaller, 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 any of the above technical solutions, further, the stator further includes: at least one first groove arranged on the outer surface of the yoke part, which is away from the tooth part; the first groove on each segmented punch extends along the axis into a second groove based on a stacked arrangement of a plurality of segmented punches.

In this technical scheme, besides fixing the plurality of stator laminations through the connecting piece, the plurality of stator laminations which are stacked and arranged can be connected and fixed with each other through a welding mode.

In order to realize the welding of a plurality of stator punching sheets, a second groove for welding is also arranged on the stator, and the second groove is jointly formed by the first grooves arranged on the plurality of stator punching sheets.

Wherein, set up at least one first recess on each piecemeal towards the piece, specifically, first recess sets up in yoke portion surface that deviates from the tooth. The plurality of segmented punching sheets are arranged in a stacked mode, and the first grooves on any two adjacent segmented punching sheets are aligned with each other, so that the first grooves on each segmented punching sheet extend along the axial direction of the stator to jointly form the second grooves. That is, a second groove, which is formed by a plurality of first grooves, is located on the outer surface of the stator facing away from the teeth.

It can be understood that the first groove is formed in the block punching sheet, and the medium at the first groove is different from the medium at other positions of the block punching sheet, so that vortex is easily formed, and further vortex loss is caused. The magnetic lines of force at different positions of the segmented punched sheet have different densities, and it can be understood that the lower the magnetic density of the position where the first groove is located is, the smaller the eddy current loss caused by the magnetic density is, so that the eddy current loss can be reduced by adjusting the position where the first groove is arranged. Specifically, the magnetic density of the motor, which is close to the outer side of the stator, is relatively low, namely, the magnetic density of the position, close to the outer edge, away from the tooth, of the segmented punching sheet is relatively low, so that the first groove is formed in the outer surface, away from the tooth, of the yoke, and eddy current loss caused by the first groove can be effectively reduced.

The first grooves are formed in the segmented punched sheets, the second grooves are formed by the first grooves which are arranged in a stacked mode, and welding can be performed at the second grooves, so that a plurality of stator punched sheets which are arranged in a stacked mode are fixed in a welded mode. And the first groove forming the second groove is arranged on the outer surface of the yoke part, which is away from the tooth part, so that the first groove can be arranged in a region with lower magnetic density, and the eddy current loss caused by the arrangement of the first groove is effectively reduced.

In any of the above technical solutions, further, the connection points of the two first contour segments and the second contour segment extend along a direction perpendicular to the first contour segments, a preset line segment is formed between two intersection points formed by the two first contour segments and the outer edge of the yoke, and at least one first groove is disposed on the preset line segment.

In this technical solution, the position of the first groove is further defined. Specifically, the connection points of the two first contour sections and the second contour section extend along the direction perpendicular to the first contour sections, a preset line segment is formed between two intersection points formed by the two first contour sections and the outer edge of the yoke part, and the first groove is arranged on the preset line segment. That is, the intersection point of the two first contour segments and the second contour segment is projected on the outer edge of the yoke in the direction perpendicular to the first contour segments, and the first groove is located on the edge line between the two projection points.

By limiting the position of the first groove to the outer edge portion between the points of intersection of the two first contour segments and the outer edge of the yoke after extending in the direction perpendicular to the first contour segments, the first groove can be limited to a position relatively close to the middle of the segmented punching sheet, so that the welding positions of the segmented punching sheets are relatively close to the middle of the segmented punching sheet, the segmented punching sheets are stressed more uniformly, and the connection between the segmented punching sheets is more stable.

In any of the above technical solutions, further, based on the two first grooves, the two first grooves are symmetrically disposed with respect to a radial center line of the tooth portion.

In this technical scheme, under the condition that two first recesses, two first recesses are symmetrical to the radial central line of tooth portion and set up.

Through with two first recesses symmetric distribution in the both sides of tooth along radial central line, after the piecemeal punching of range upon range of setting welds in first recess department, a plurality of piecemeal punching keep balanced atress, make each piecemeal punching connect more stably.

In any of the above technical solutions, further, the stator further includes: the first connecting part is arranged at one edge of the yoke part extending along the radial direction of the stator punching sheet; the second connecting part is arranged at the other edge of the yoke part extending along the radial direction of the stator punching sheet, and the first connecting part of one segmented punching sheet can be connected with the second connecting part of the adjacent segmented punching sheet in a jogged mode.

In the technical scheme, in order to realize the connection between the segmented punching sheets, a first connecting part and a second connecting part are further arranged on the segmented stator. Specifically, the first connecting portion is disposed at one edge of the yoke portion extending along the radial direction of the stator punching sheet, and the second connecting portion is disposed at the other edge of the yoke portion extending along the radial direction of the stator punching sheet, that is, the first connecting portion and the second connecting portion are disposed at two sides of the block punching sheet along the circumferential direction of the stator punching sheet. 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 punching sheets are formed by surrounding.

The first connecting part and the second connecting part can be mutually separated, and two adjacent block punching sheets are mutually separated under the state that the first connecting part and the second connecting part are separated, so that the stator punching sheets are decomposed. It can be appreciated that the stator is in the course of the work, and the phenomenon that a certain piece of piecemeal towards piece damage probably appears, can be through separating first connecting portion and second connecting portion this moment to take out broken piece towards the piece from the stator towards piece, only change the maintenance to broken piece towards piece alone, and need not to wholly change the stator towards piece, reduced maintenance cost.

The first connecting part and the second connecting part are respectively arranged on two edges of the yoke part extending along the radial direction of the stator punching sheet, so that two arbitrarily connected partitioned punching sheets in the partitioned punching sheets are connected with each other, and then the stator punching sheet is formed by surrounding. The first connecting part and the second connecting part can be connected with each other or separated from each other, so that the split connection between the split blocks is realized, the split blocks in the stator are easy to split independently, the product is easier to maintain, and the maintenance cost of the product is reduced.

In any of the above solutions, further, the first connection portion is configured as a protruding member and the second connection portion is configured as a groove adapted to the protruding member.

In this technical scheme, first connecting portion is constructed as the protrusion piece, and the second connecting portion is constructed as the recess, is concave-convex fit's structure between first connecting portion and the second connecting portion promptly, recess and protrusion looks adaptation realize the connection cooperation of first connecting portion and 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 any of the above technical solutions, further, 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: 0.57 More than or equal to phi 2/phi 1 more than or equal to 0.5.

In this embodiment, the relationship between the outer diameter and the inner diameter of the stator lamination 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: 0.57 More than or equal to phi 2/phi 1 more than or equal to 0.5.

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 more than or equal to 0.5 and less than or equal to 0.57 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.

A second aspect of the present invention proposes an electric machine comprising: a stator assembly comprising a stator as provided in any one of the possible designs described above and windings wound on the stator; and the rotor is arranged in the stator.

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

Wherein, the stator is inside to be equipped with the stator groove, and the rotor sets up in the stator groove, specifically, stator and rotor logical axle setting, and the rotor can rotate for the stator. Further, the stator is also provided with windings, in particular, the windings are arranged on the stator teeth. The stator comprises stator punching sheets which are arranged in a laminated mode, a plurality of tooth parts are arranged on the stator punching sheets, and the tooth parts of the stator punching sheets are arranged in a laminated mode to form a plurality of stator teeth. The stator teeth are arranged on the inner side of the stator and face the rotor. The winding is wound on the stator teeth, the winding is used for generating magnetic induction wires in an electrified state, and the rotor is equivalent to the rotor rotating relative to the winding in the rotating process of the rotor relative to the stator, so that the rotor cuts the magnetic induction wires, generates force for driving the rotor to rotate, and further realizes the operation of the motor.

Specifically, the winding can be aluminum wire, and 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 adopted 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.

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.

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

In any of the above technical solutions, further, the rated torque of the motor is T1, the inner diameter of the stator lamination is Φ2, and the torque per unit volume of the rotor is T2, wherein T1, Φ2, and T2 satisfy the following conditions ：5.18×10^-7≤T1×Φ2^-3×T2^-1≤1.17×10^-6,5kN·m·m^-3≤T2≤45kN·m·m^-3.

In this technical scheme, the range of 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 limited. 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 2, unit volume torque of the rotor is T2, and the following conditions are satisfied among T1, phi 2 and T2:

5.18×10^-7≤T1×Φ2^-3×T2^-1≤1.17×10^-6，

5kN·m·m^-3≤T2≤45kN·m·m^-3。

The output torque of the motor can be made to satisfy the requirements of the equipment in which the motor is installed by defining 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 of 5.18×10 ^-7 or more and 1.17×10 ^-6 or less, and defining the unit-volume torque of the rotor of 5kn·m ^-3 or more and 45kn·m ^-3 or less.

A third aspect of the invention proposes a compressor comprising an electric motor as set forth in the second aspect of the invention; and the compressing component is connected with the motor.

The compressor provided by the invention comprises a motor and a compression part, wherein the compression part is connected with the motor, and the motor provides power for the compression part so as to enable the compression part to operate.

The compressor according to the present application includes the motor according to the second aspect of the present application, and thus has all the advantageous effects of the motor according to the second aspect of the present application.

A fourth aspect of the present invention proposes an electrical device comprising: an apparatus main body; and a compressor according to a fourth aspect of the present invention, the compressor being connected to the apparatus body.

The electric equipment provided by the invention comprises the equipment main body and the 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 electric equipment runs so as to enable the electric equipment to run normally.

The electrical equipment provided by the application comprises the compressor provided by the third aspect of the application, so that the electrical equipment has all the beneficial effects of the compressor provided by the third aspect of the application.

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 illustrates a schematic structural view of a stator lamination of one embodiment of the present invention;

FIG. 2 shows one of the structural schematic diagrams of a segmented blank of one embodiment of the invention;

FIG. 3 shows a second schematic block diagram of a segmented stamping 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 an embodiment of the present invention.

The correspondence between the reference numerals and the component names in fig. 1 to 5 is:

100 stator, 110 segmented laminations, 111 teeth, 112 yokes, 113 connectors, 115 first connectors, 116 second connectors, 117 first profile segments, 118 second profile segments, 119 first grooves, 120 stator laminations, 200 rotors, 210 rotor laminations, 300 compressors, 310 compression components, 311 cylinders, 312 pistons, 320 crankshafts, 330 main bearings, 340 sub-bearings.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and 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, but 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 100, a motor, a compressor 300, and an electric device provided according to some embodiments of the present invention are described below with reference to fig. 1 to 5.

Embodiment one:

As shown in connection with fig. 1,2 and 5, an embodiment of a first aspect of the present invention proposes a stator 100 comprising: a plurality of stator laminations 120 arranged in a stacked manner, the stator laminations 120 including a plurality of split-connectable segmented laminations 110; any one of the plurality of segmented chips 110 includes: a tooth portion 111; the yoke part 112 is connected with the tooth part 111, at most two connecting pieces 113 are arranged on the first surface of the yoke part 112, at most two matching pieces are arranged on the second surface of the yoke part 112, and the connecting pieces 113 are arranged in one-to-one correspondence with the matching pieces; wherein at most two connection pieces 113 of one divided punch 110 can be respectively inserted into at most two mating pieces of another divided punch 110 adjacent in the axial direction of the stator 100 to connect the plurality of divided punches 110 in the axial direction with a distance from the center of any one connection piece 113 of the at most two connection pieces 113 to the outer edge of the stator punch being smaller than a distance from the center of the connection piece 113 to the inner edge of the stator punch.

The stator 100 provided by the invention is of a split structure, specifically, the stator 100 comprises a plurality of stator punching sheets 120, the plurality of stator punching sheets 120 are stacked, the shape and the structure of each stator punching sheet 120 are the same, and the plurality of stator punching sheets 120 are stacked, so that the plurality of stator punching sheets 120 jointly form the main body of the stator 100. Compared with the stator 100 designed into a whole structure, the split stator 100 formed by a plurality of stator punching sheets 120 has the advantages of reduced processing difficulty and easier maintenance and replacement.

In order to further reduce the processing difficulty of the stator 100 core and improve the slot filling rate of the motor, the stator punching sheet 120 is also provided as a split structure. The stator lamination 120 includes a plurality of segmented laminations 110, and the plurality of segmented laminations 110 are connected in a split manner. Specifically, the plurality of segmented laminations 110 are connected end-to-end with each other and are circumferentially spliced together to form the stator lamination 120. A connecting device can be arranged between two adjacent segmented punching sheets 110, so that the two segmented punching sheets 110 can be connected in a split manner, and a connecting structure can be arranged at the end part of each segmented punching sheet 110 so as to realize connection and separation between the two segmented punching sheets 110. Through setting up the piecewise towards piece 110 as the structure that can splice each other and connect to when processing stator towards piece 120, only processing a plurality of piecewise towards piece 110 can, again assemble into stator towards piece 120 with a plurality of piecewise towards piece 110 parts, compare in processing a complete stator towards piece 120, the degree of difficulty of processing piecewise towards piece 110 part reduces, thereby reduced manufacturing cost, this kind of stator 100 simple structure, the automated production to stator 100 is realized to the accessible automated production line, and, designs stator 100 as split type mosaic structure, be favorable to improving the groove full rate of motor.

The shape and structure of each of the segmented stator laminations 120 are identical, and one of the plurality of segmented stator laminations 120 is illustrated as an example.

The segmented stator lamination 120 includes a tooth 111 and a yoke 112, wherein the yoke 112 is connected to the tooth 111. In a state where a plurality of segmented stators 100 are spliced into the stator lamination 120, the yoke 112 is disposed on a side near the outer edge of the stator lamination 120, and the tooth 111 is disposed on a side near the inner edge of the stator lamination 120. The teeth 111 in the plurality of stacked segmented laminations 110 together form the teeth of the stator 100, and the teeth of the stator 100 are used for winding the windings.

Further, in order to achieve connection between the plurality of stacked divided punched pieces 110, at most two connection pieces 113 are provided on the first face of the yoke 112, and at most two mating pieces are provided on the second face of the yoke 112. Specifically, the first face of the yoke 112 and the second face of the yoke 112 face away from each other, and in the case where a plurality of the segmented chips 110 are stacked, the first face of the yoke 112 of one segmented chip 110 is opposed to the second face of the yoke 112 of another segmented chip 110 adjacent thereto. Further, the connecting piece 113 is adapted to the mating piece, and the connecting piece 113 of one segmented lamination 110 can be inserted into a mating piece of another segmented lamination 110 adjacent to the stator 100 in the axial direction, so as to connect two segmented lamination 110 adjacent to each other along the stator 100 in the axial direction, and further connect stator lamination 120 in a stacked manner.

Further, in order to further improve the connection firmness between the plurality of stacked segmented punched sheets 110, the segmented punched sheets 110 are prevented from being segmented during the working process, the number of the connecting pieces 113 and the number of the matching pieces are at least two, and the connecting pieces 113 and the number of the matching pieces are the same and are in one-to-one correspondence.

It will be appreciated that the present application improves the reliability and stability of the connection of stator laminations 120 to each other by providing at least two fixation points, i.e., at most two connectors 113 and at most two mating pieces, on the segmented lamination 110 relative to a fixed point. The stator punching 120 that the range upon range of setting has realized the multiple spot location under the cooperation effect of at most two connecting pieces 113 and at most two cooperation pieces one-to-one, makes unable relative rotation appear between two stator punching 120 to avoided the segmentation phenomenon that segmentation punching 110 probably appears in the course of the work, promoted stator 100 holistic stability.

Further, the connecting piece 113 and the center line of the corresponding mating piece in the axial direction are collinear, and the connecting piece 113 is matched with the mating piece. Thus, in the case where a plurality of segmented punched pieces 110 are stacked in the axial direction of the stator 100, the connecting pieces 113 on the segmented punched pieces 110 can be inserted into the mating pieces of the adjacent segmented punched pieces 110 in the axial direction, and in such a manner, the interconnection of the plurality of stacked segmented punched pieces 110 is achieved.

Further, the setting position of the connection member 113 is defined. The distance from the center of the connecting piece 113 to the outer edge of the stator lamination 120 is smaller than the distance from the center of the connecting piece 113 to the inner edge of the stator lamination 120, i.e., the center of the connecting piece 113 is closer to the outer edge side of the stator lamination 120.

The connecting piece 113 is arranged on the segmented punching sheet 110, and the surface of the segmented punching sheet 110 at the position of the connecting piece 113 is deformed, so that vortex is easily formed, and further vortex loss is caused. The magnetic flux density of the magnetic lines at different positions of the segmented lamination 110 is different, and it can be understood that the lower the magnetic flux density of the position of the connecting member 113 is, the smaller the eddy current loss caused by the magnetic flux density is, so that the eddy current loss can be reduced by adjusting the position of the connecting member 113. Specifically, the magnetic density of the motor near the outer side of the stator 100 is relatively low, that is, the magnetic density of the stator lamination 120 near the outer edge is low, so that the connection member 113 is disposed at a side closer to the outer edge of the stator lamination 120, which can effectively reduce the eddy current loss caused by the provision of the connection member 113.

Further, since the eddy current loss is caused by the eddy current formed due to the provision of the connection pieces 113, it is understood that the larger the number of the connection pieces 113 is, the larger the eddy current loss is caused. Therefore, the present invention reduces the number of the connection pieces 113, and reduces the number of the connection pieces 113 on the premise of ensuring the stability of the stator 100, thereby effectively reducing the eddy current loss.

Through designing stator 100 as the stator punching 120 subassembly that is set up by a plurality of stacks to with the structural design of stator punching 120 for including a plurality of piecewise piece punching 110 that can splice the connection, thereby reduced stator 100's the processing degree of difficulty, reduction in production cost, this kind of stator 100 structure is easy to process, and the automated production to stator 100 is realized to the accessible automation line, further reduces manufacturing cost through automated production, improves production efficiency. Further, the stator 100 is designed into a split type splicing structure, which is also beneficial to improving the slot filling rate of the motor. By providing at most two connecting pieces 113 and at most two mating pieces on the first face and the second face of the yoke 112, respectively, two segmented laminations 110 adjacent in the axial direction of the stator 100 can be connected to each other by the mating of the connecting pieces 113 and the mating pieces, and further, the plurality of stator laminations 120 which are stacked can be connected to each other. And the multi-point positioning among the plurality of stator punching sheets 120 is realized by the connecting mode, so that the relative rotation between the two stator punching sheets 120 cannot occur, the possible occurrence of the slicing phenomenon of the slicing punching sheet 110 in the working process is avoided, and the overall stability of the stator 100 is improved. By making the distance from the center of the connecting piece 113 to the outer edge of the stator lamination 120 smaller than the distance from the center of the connecting piece 113 to the inner edge of the stator lamination 120, the connecting piece 113 can be disposed in a region where the magnetic flux density is low, thereby effectively reducing the eddy current loss caused by the disposition of the connecting piece 113.

Embodiment two:

in a specific embodiment on the basis of the first embodiment, as shown in connection with fig. 2, any one of at most two connection elements 113 is configured as a protruding element, and any one of at most two mating elements is configured as a recess adapted to the protruding element.

In this embodiment, the connection member 113 is configured as a protrusion and the mating member is configured as a recess, so that the connection member 113 and the mating member are connected by means of a male-female fit. Specifically, the protruding piece is in interference fit with the groove, and after the protruding piece is inserted into the groove, the inner wall of the groove extrudes the outer wall of the protruding piece, so that a certain interaction force is generated between the protruding piece and the groove, and the two mutually connected partitioned stamping pieces are prevented from being separated.

The connecting piece and the matching piece can be of an integrated structure, specifically, the protruding piece is of a hollow structure, and a hollow cavity in the protruding piece forms a groove.

By constructing the connecting member 113 as a protruding member and constructing the mating member as a groove, a concave-convex mating structure is formed between the connecting member 113 and the mating member, and the connecting structure is easy to assemble and reliable in connection, so that the assembly efficiency of the stator 100 is improved.

The outer diameter of the stator lamination 120 is Φ1, the thickness of the yoke 112 is L1, and the distance from the center of the connecting piece 113 to the center of the stator lamination 120 is H1, wherein H1 satisfies: 0.5× (Φ1-L1) < H1< Φ1/2.

In this embodiment, the region where the first connecting piece 113 is provided is further defined, and the position region where the center of the first connecting piece 113 is located is specifically defined according to the outer diameter of the stator core 120 and the thickness of the yoke 112. Specifically, the outer diameter of the stator lamination 120 is Φ1, the thickness of the yoke 112 is L1, and the distance from the center of the first connector 113 to the center of the stator lamination 120 is H1, where H1 satisfies: 0.5× (Φ1-L1) < H1< Φ1/2.

The outer diameter of the stator lamination 120 and the thickness of the yoke 112 define a location area where the center of the first connecting member 113 is located, so that the location of the first connecting member 113 can be more precisely defined, and the machining operation of the first connecting member 113 is facilitated. And, the distance from the center of the first connecting piece 113 to the center of the stator lamination 120 is defined as H1 to be 0.5× (Φ1-L1) < H1< Φ1/2, the center of the first connecting piece 113 is made to be close to the outer edge side of the stator lamination 120, and the first connecting piece 113 is disposed in the region where the magnetic flux density is low, so that the eddy current loss caused by the disposition of the first connecting piece 113 is effectively reduced.

Embodiment III:

As shown in fig. 2, in one specific embodiment of the above embodiments, 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 117 and a second contour segment 118 connected to each other, one end of the first contour segment 117 being connected to the tooth root of the tooth 111, and the other end of the first contour segment 117 being connected to the second contour segment 118; wherein the first contour segment 117 is a straight segment and the second contour segment 118 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 110 is provided with inner contour sections on both sides of the tooth 111, respectively.

Specifically, the inner profile section includes a first profile section 117 and a second profile section 118, the first profile section 117 being connected to the second profile section 118. One end of the first profile section 117 is connected to the tooth root of the tooth 111, the other end of the first profile section 117 is connected to the second profile section 118, one end of the second profile section 118 is connected to the first profile section 117, and the other end of the second profile section 118 is connected to a side of the yoke 112 extending radially along the stator lamination 120. The first profile section 117 has a different shape than the second profile section 118, specifically, the first profile section 117 is a straight line section and the second profile section 118 is an arc section.

By providing the inner contour segment as a contour composed of a first contour segment 117 of a straight line segment and a second contour segment 118 of an arc segment, it is advantageous to limit the size of the yoke 112 to avoid flux density saturation.

Further, the stator 100 can cooperate with the rotor 200; the length of the first contour segment 117 is L2, the length of the second contour segment 118 is L3, and the pole pair number of the rotor 200 is 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 118 is too large, the length of the first profile section 117 is small, and the space of the stator slot is reduced. When the length of the second profile section 118 is too small, the length of the first profile section 117 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 117 and the second profile section 118, 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 117 to the second profile section 118 also affects the magnetic flux density saturation, so that the ratio of the first profile section 117 to the second profile section 118 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.

Embodiment four:

As shown in fig. 1 and 3, in one specific embodiment of the above embodiments, the stator 100 further includes: at least one first groove 119 provided on an outer surface of the yoke 112 facing away from the tooth 111; based on the stacked arrangement of the plurality of segmented dies 110, the first groove 119 on each segmented die 110 extends along the axis into a second groove.

In this embodiment, in addition to fixing the plurality of stator laminations 120 by the connector, the plurality of stator laminations 120 that are stacked and arranged may be connected and fixed to each other by welding.

In order to achieve the welding of the plurality of stator laminations 120, a second groove for welding is also provided on the stator 100, which is jointly formed by the first grooves 119 provided on the plurality of stator laminations 120.

Wherein, at least one first groove 119 is arranged on each segmented punching sheet 110, and the first groove 119 is used for welding a plurality of segmented punching sheets 110 in the axial direction. Specifically, the first groove 119 is provided at an outer surface of the yoke 112 facing away from the tooth 111. Since the plurality of segmented punched pieces 110 are stacked and the first grooves 119 on any two adjacent segmented punched pieces 110 are aligned with each other, the first grooves 119 on each segmented punched piece 110 extend along the axial direction of the stator 100 to form second grooves together. That is, a second groove made up of a plurality of first grooves 119 is located on the outer surface of the stator 100 facing away from the teeth 111.

It can be appreciated that, the first groove 119 is formed on the segmented stamping 110, and the medium at the first groove 119 is different from the medium at other positions of the segmented stamping 110, so that eddy current is easily formed, and eddy current loss is caused. The magnetic flux density of the magnetic lines at different positions of the segmented lamination 110 is different, and it can be understood that the lower the magnetic flux density at the position where the first groove 119 is located, the smaller the eddy current loss caused by the magnetic flux density is, so that the eddy current loss can be reduced by adjusting the position where the first groove 119 is located. Specifically, the magnetic density of the motor near the outer side of the stator 100 is relatively low, that is, the magnetic density of the segmented stamping 110 near the outer edge facing away from the teeth 111 is low, so that the first groove 119 is provided on the outer surface of the yoke 112 facing away from the teeth 111, which can effectively reduce the eddy current loss caused by the provision of the first groove 119.

By providing the first grooves 119 on the segmented lamination 110 and forming the second grooves by stacking the first grooves 119, welding can be performed at the second grooves, so that the plurality of stacked stator laminations 120 are fixed by welding. In addition, the first groove 119 forming the second groove is arranged on the outer surface of the yoke 112, which is away from the tooth 111, so that the first groove 119 can be arranged in a region with low magnetic flux density, and the eddy current loss caused by arranging the first groove 119 can be effectively reduced.

Further, the connection points of the two first profile sections 117 and the second profile section 118 extend along the direction perpendicular to the first profile sections 117, and a preset line segment is formed between two intersection points formed by the two first profile sections 117 and the outer edge of the yoke 112, and at least one first groove 119 is disposed on the preset line segment.

In this embodiment, the arrangement position of the first groove 119 is further defined. Specifically, the connection points of the two first profile sections 117 and the second profile sections 118 extend in a direction perpendicular to the first profile sections 117, and a preset line segment (that is, a line segment between M and N in the outer profile of the yoke 112 in the segmented lamination 110) is formed between two intersection points formed with the outer edge of the yoke 112, and the first groove 119 is disposed on the preset line segment. That is, the intersection points of the two first profile sections 117 and the second profile section 118 are projected on the outer edge of the yoke 112 in the direction perpendicular to the first profile sections 117, and the first groove 119 is located on the edge line between the two projected points.

It will be appreciated that, because of the width of the teeth being L4, the width of the first profile section 117 is L2. The two first profile sections are connected to the tooth root of the tooth, so that a line segment (length l4+2l2) formed by the two first profile sections 117 and the tooth root is projected on the outer edge of the yoke 112 in a direction perpendicular to the first profile sections 117, and the first groove 119 is located in the projection range of the line segment on the outer edge of the yoke 112.

By defining the location of the first groove 119 at the outer edge portion between the intersection of the two first profile sections 117 and the outer edge of the yoke 112 after extending in the direction perpendicular to the first profile sections 117 at the connection point of the two first profile sections 117 and the second profile sections 118, the first groove 119 can be defined at a position relatively close to the middle of the segmented stamping 110, so that the welding position of the plurality of segmented stamping 110 is relatively close to the middle of the segmented stamping 110, the stress of the segmented stamping 110 is more uniform, and the connection between the segmented stamping 110 is more stable.

Further, based on the two first grooves 119, the two first grooves 119 are symmetrically disposed with respect to the center line of the tooth 111 in the radial direction.

In this embodiment, in the case where there are two first grooves 119, the two first grooves 119 are symmetrically disposed with respect to the center line of the tooth portion 111 in the radial direction.

By symmetrically distributing the two first grooves 119 on two sides of the radial center line of the tooth 111, after the stacked segmented punching sheets 110 are welded at the first grooves 119, the segmented punching sheets 110 maintain balanced stress, so that the segmented punching sheets 110 are connected more stably.

Fifth embodiment:

As shown in fig. 2, in one specific embodiment of the above embodiments, the stator 100 further includes: the first connection portion 115 is disposed at an edge of the yoke portion 112 extending along the radial direction of the stator lamination 120; the second connection portion 116 is disposed at the other edge of the yoke 112 extending in the radial direction of the stator lamination 120, and the first connection portion 115 of one segmented lamination 110 can be connected with the second connection portion 116 of an adjacent segmented lamination 110 in a joggable manner.

In this embodiment, in order to achieve the connection between the segmented chips 110, a first connection portion 115 and a second connection portion 116 are further provided on the segmented stator 100. Specifically, the first connection portion 115 is disposed at one edge of the yoke portion 112 extending along the radial direction of the stator lamination 120, and the second connection portion 116 is disposed at the other edge of the yoke portion 112 extending along the radial direction of the stator lamination 120, that is, the first connection portion 115 and the second connection portion 116 are disposed at two sides of the segmented lamination 110 along the circumferential direction of the stator lamination 120. The first connection portion 115 of one segmented blank 110 is mated with the second connection portion 116 of an adjacent other segmented blank 110, thereby achieving the connection of the two segmented blanks 110. The plurality of segmented punched pieces 110 are arranged along the circumferential direction of the stator 100, and any two adjacent segmented punched pieces 110 are matched through the first connecting part 115 and the second connecting part 116, so that the plurality of segmented punched pieces 110 are connected, and the stator punched pieces 120 are formed in a surrounding manner.

The first connecting portion 115 and the second connecting portion 116 may be separated from each other, and two adjacent divided punched pieces 110 are separated from each other in a state where the first connecting portion 115 and the second connecting portion 116 are separated from each other, thereby achieving the disassembly of the stator punched piece 120. It can be appreciated that during the operation of the stator 100, a damage phenomenon of a certain piece of the segmented lamination 110 may occur, and at this time, the damaged piece of the segmented lamination 110 may be removed from the stator lamination 120 by separating the first connecting portion 115 from the second connecting portion 116, so that only the damaged piece of the segmented lamination 110 is replaced and maintained individually, without replacing the stator lamination 120 integrally, thereby reducing maintenance cost.

By providing the first connecting portion 115 and the second connecting portion 116 on two edges of the yoke portion 112 extending in the radial direction of the stator lamination 120, two arbitrarily connected segmented laminations 110 of the plurality of segmented laminations 110 are connected to each other, thereby surrounding and forming the stator lamination 120. The first connecting portion 115 and the second connecting portion 116 can be connected with each other or separated from each other, so that the split connection between the split blocks is realized, the split block punching sheet 110 in the stator 100 is easy to split independently, the product is easier to maintain, and the maintenance cost of the product is reduced.

Further, the first connection portion 115 is configured as a protrusion, and the second connection portion 116 is configured as a groove adapted to the protrusion.

In this embodiment, the first connection portion 115 is configured as a protruding member, and the second connection portion 116 is configured as a groove, that is, a structure in which the first connection portion 115 and the second connection portion 116 are in concave-convex fit, and the groove is adapted to the protrusion, so that the connection fit of the first connection portion 115 and the second connection portion 116 is achieved.

Through setting up first connecting portion 115 as the protrusion, set up second connecting portion 116 as the recess with protrusion matched with, made between first connecting portion 115 and the second connecting portion 116 form unsmooth matched with structure, promoted the connection reliability, reduced the processing degree of difficulty.

Example six:

in one embodiment of the above embodiments, 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: 0.57 More than or equal to phi 2/phi 1 more than or equal to 0.5.

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: 0.57 More than or equal to phi 2/phi 1 more than or equal to 0.5.

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 0.5 and less than or equal to 0.57, so that each parameter of the motor can reach an ideal range, and the motor has higher cost performance.

Embodiment seven:

A second aspect of the present invention proposes an electric machine comprising: a stator 100 assembly, the stator 100 assembly comprising a stator 100 as provided in any one of the possible designs described above and windings wound on the stator 100; the rotor 200 is disposed in the stator 100.

The motor provided by the application comprises a stator 100 assembly, wherein the stator 100 assembly comprises a stator 100, a rotor 200 and windings wound on the stator 100.

The stator 100 is provided with a stator 100 groove inside, the rotor 200 is disposed in the stator 100 groove, specifically, the stator 100 and the rotor 200 are disposed in a through shaft, 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 windings are wound on the teeth of the stator 100, 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.

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.

Further, a plurality of flux guide grooves are provided on the rotor 200.

As shown in fig. 4, the rotor 200 is formed by stacking a plurality of rotor punching sheets 210, and a plurality of magnetic flux guiding grooves are provided on any one of the rotor punching sheets 210, and the magnetic flux guiding grooves are distributed throughout the rotor punching sheets 210 along the axial direction of the motor, that is, throughout the rotor punching sheets 210 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.

The motor according to the present application, because it comprises a stator 100 in any of the possible designs described above, has all the advantages of the stator 100 provided in any of the possible designs described above.

Example eight:

in one embodiment of the above embodiments, the rated torque of the motor is T1, the inner diameter of the stator lamination 120 is Φ2, and the torque per unit volume of the rotor 200 is T2, wherein T1, Φ2 and T2 satisfy the following conditions ：5.18×10^-7≤T1×Φ2^-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 100200 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 Φ2, and the torque per unit volume of the rotor 200 is T2, wherein T1, Φ2, and T2 satisfy the following conditions:

5.18×10^-7≤T1×Φ1^-3×T2^-1≤1.17×10^-6，

5kN·m·m^-3≤T2≤45kN·m·m^-3。

By defining the combination variable among the rated torque of the motor, the inner diameter of the stator lamination 120, and the unit volume torque of the rotor 200 to be 5.18×10 ^-7 or more and 1.17×10 ^-6 or less, and defining the unit volume torque of the rotor 200 to be 5kn·m· ^-3 or more and 45kn·m·m ^-3 or less, the output torque of the motor can be made to satisfy the requirements of the equipment to which the motor is provided.

Example nine:

as shown in fig. 5, a third aspect of the present invention proposes a compressor 300 comprising an electric motor as proposed in the second aspect of the present invention; and a compressing part 310, the motor being connected to the compressing part 310.

The compressor 300 according to the present invention includes a motor and a compressing unit 310, wherein the compressing unit 310 is connected to the motor, and the motor provides power to the compressing unit 310 to operate the compressing unit 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 application includes the motor according to the second aspect of the present application, and thus the compressor 300 has all the advantages of the motor according to the second aspect of the present application.

Example ten:

A fourth aspect of the present invention proposes an electrical device comprising: an apparatus main body; and a compressor 300 according to the fourth aspect of the present invention, the compressor 300 being connected to the apparatus body.

The electrical equipment provided by the invention comprises an equipment main body and a 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 operated together in a matched mode so that the electrical equipment can run normally.

The electrical apparatus according to the present application includes the compressor 300 according to the third aspect of the present application, and thus has all the advantageous effects of the compressor 300 according to the third aspect of the present application.

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

1. A stator, comprising:

the stator punching sheets comprise a plurality of split punching sheets which can be connected in a split mode;

any one of the plurality of segmented chips comprises:

a tooth portion;

The yoke part is connected with the tooth part, the first surface of the yoke part is provided with at most two connecting pieces, the second surface of the yoke part is provided with at most two matching pieces, and the connecting pieces are arranged in one-to-one correspondence with the matching pieces;

Wherein the at most two connecting pieces of one of the divided pieces are respectively insertable into the at most two mating pieces of the other of the divided pieces adjacent in the axial direction of the stator to connect the plurality of divided pieces in the axial direction; the outer diameter of the stator punching sheet is phi 1, the thickness of the yoke part is L1, and the distance from the center of the connecting piece to the center of the stator punching sheet is H1, wherein H1 satisfies the following conditions: 0.5× (Φ1-L1) < H1< Φ1/2.

2. The stator as claimed in claim 1, wherein,

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.

3. The stator as claimed in claim 1, wherein,

Any one of the at most two connectors is configured as a protrusion and any one of the at most two mating members is configured as a recess that mates with the protrusion.

4. The stator as claimed in claim 2, wherein,

The stator can work together 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 the L2, the L3 and the 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.

5. The stator of claim 2, wherein the stator further comprises:

at least one first groove provided on an outer surface of the yoke facing away from the tooth;

The first groove on each segmented punch extends along an axis into a second groove based on the stacked arrangement of the plurality of segmented punches.

6. The stator as claimed in claim 5, wherein,

The connecting points of the two first contour sections and the second contour section extend along the direction perpendicular to the first contour sections, a preset line segment is formed between two intersecting points formed by the two connecting points and the outer edge of the yoke part, and the at least one first groove is arranged on the preset line segment.

7. The stator according to any one of claims 1 to 6, characterized in that the stator further comprises:

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

and the second connecting part is arranged at the other edge of the yoke part extending along the radial direction of the stator punching sheet, and the first connecting part of one segmented punching sheet can be connected with the second connecting part of the adjacent segmented punching sheet in a splicing way.

8. The stator as claimed in claim 7, wherein,

The first connection portion is configured as a protrusion and the second connection portion is configured as a recess adapted to the protrusion.

9. The stator according to any one of claims 1 to 6, wherein,

The inner diameter of the stator punching sheet is phi 2, and the relation between phi 1 and phi 2 satisfies the following conditions: 0.57 More than or equal to phi 2/phi 1 more than or equal to 0.5.

10. An electric machine, the electric machine comprising:

a stator assembly comprising the stator of any one of claims 1 to 9 and a winding wound on the stator;

and the rotor is arranged in the stator.

11. The motor of claim 10, wherein the motor is configured to control the motor,

Rated torque of the motor is T1, inner diameter of the stator punching sheet is phi 2, unit volume torque of the rotor is T2, and the requirements among T1, phi 2 and T2 are met:

5.18×10^-7≤T1×Φ2^-3×T2^-1≤1.17×10^-6，

5kN·m·m^-3≤T2≤45kN·m·m^-3。

12. A compressor, comprising:

An electrical machine as claimed in claim 10 or 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.