WO2023103668A1

WO2023103668A1 - Stator, motor, compressor, and electrical device

Info

Publication number: WO2023103668A1
Application number: PCT/CN2022/129745
Authority: WO
Inventors: 徐飞; 程文; 邱小华; 张肃; 江波; 丁云霞
Original assignee: 安徽美芝精密制造有限公司
Priority date: 2021-12-08
Filing date: 2022-11-04
Publication date: 2023-06-15
Also published as: CN114094731B; CN114094731A

Abstract

A stator (100), a motor, a compressor (300), and an electrical device. The stator (100) comprises: multiple stator punching blocks (110), each stator punching block (110) comprising: multiple laminated sub-block punching sheets (115), the multiple sub-block punching sheets (115) being connected to form a stator punching sheet (120) along the circumferential direction of the stator (100); and welding portions (130), provided on the stator punching blocks (110), the welding portions (130) being used for connecting every two adjacent stator punching blocks (110), and each welding portion (130) comprising: at least two welding points. The stator punching blocks are connected by spot welding, the heat loss of a stator core can be reduced, a magnetic field can be prevented from weakening, and the reduction of efficiency of a motor can be avoided.

Description

Stators, motors, compressors and electrical equipment

This application claims the priority of the Chinese patent application with the application number "202111492565.2" and the application name "Stator, Motor, Compressor and Electrical Equipment" submitted to the State Intellectual Property Office of China on December 08, 2021, the entire content of which Incorporated in this application by reference.

technical field

The present application belongs to the technical field of motors, and in particular, relates to a stator, a motor, a compressor and electrical equipment.

Background technique

The motor will generate eddy current when it is working, and the eddy current loss will cause the stator core in the motor to heat up.

technical problem

The stator core generates heat loss due to heat generation, which easily reduces the efficiency of the motor.

technical solution

This application aims to solve one of the technical problems existing in the prior art or related art.

In the first aspect, the present application proposes a stator, including: a plurality of stator punching blocks; the stator punching block includes: a plurality of stacked block punching sheets, along the circumferential direction of the stator, a plurality of block punching sheets are connected to form a stator Punching sheet; a plurality of stator punching sheets are stacked to form a stator core; the welding part is set on the edge of the stator punching block extending radially along the stator, and the welding part is used to connect two adjacent stator punching blocks; the welding part includes: at least two Welding points; along the axial direction of the stator core, the thickness of the stator punch is H1, and the thickness of the stator core is H2; there are at least two welding points along the radially extending edge of the stator core, along the stator core The axial direction, the distance between two adjacent welding points is D, H1, H2 and D satisfy, D/H1<H2/D≤H2/H1.

In the second aspect, the second aspect of the present application proposes a motor, which includes: a stator assembly, the stator assembly includes a stator as in any possible design above and a winding wound on the stator; a rotor is arranged in the stator.

In a third aspect, the present application provides a compressor, including: a motor as in any possible design in the second aspect; and a compression component, and the motor is connected to the compression component.

In a fourth aspect, the present application provides an electrical device, including: a device body; and the compressor in the third aspect, where the compressor is connected to the device body.

Beneficial effect

Compared with the way of connection welding, two adjacent stator punching blocks are connected by spot welding. The specific power loss generated by pulse spot welding is lower, and the relative magnetic permeability of the motor sample is higher, reducing magnetic flux leakage. It can weaken the eddy current loss in the stator, thereby reducing the heat loss of the stator core, preventing the weakening of the magnetic field, and avoiding the reduction of the efficiency of the motor.

Additional aspects and advantages of the application will become apparent in the description which follows, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 shows one of the structural schematic diagrams of the stator of an embodiment of the present application;

Fig. 2 shows the second structural schematic diagram of the stator of an embodiment of the present application;

FIG. 3 shows a schematic structural view of a block punching according to an embodiment of the present application;

Fig. 4 shows a schematic structural view of a stator punching sheet according to an embodiment of the present application;

Fig. 5 shows a schematic structural view of a rotor punch according to an embodiment of the present application;

Fig. 6 shows a schematic structural diagram of a compressor according to another embodiment of the present application.

Wherein, the corresponding relationship between reference numerals and component names in Fig. 1 to Fig. 6 is:

100 stator, 110 stator punching block, 111 tooth part, 112 yoke part, 113 first connecting part, 114 second connecting part, 115 block punching piece, 120 stator punching piece, 121 groove body, 123 first contour segment, 124 The second contour section, 130 welding part, 200 rotor, 210 rotor punching piece, 211 first magnet slot, 212 second magnet slot, 300 compressor, 310 compression parts, 311 cylinder, 312 piston, 320 crankshaft, 330 main bearing, 340 pairs of bearings.

BEST MODE FOR CARRYING OUT THE INVENTION

In order to better understand the above-mentioned purpose, features and advantages of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the application, but the application can also be implemented in other ways different from those described here, therefore, the protection scope of the application is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

A stator, a motor, a compressor and electrical equipment provided according to some embodiments of the present application are described below with reference to FIGS. 1 to 6 .

As shown in FIG. 1 , FIG. 2 and FIG. 6 , in some embodiments of the present application, a stator 100 is proposed, including: a plurality of stator punching blocks 110 and welding parts 130 , and the welding parts 130 are set on the stator punching blocks 110 Along the radially extending edge of the stator 100, the welding portion 130 is used to connect two adjacent stator punching blocks 110; the stator punching block 110 includes: a plurality of stacked block punching pieces 115, along the circumferential direction of the stator 100, a plurality of The segmented punching pieces 115 are connected to form a stator punching piece 120; a plurality of stator punching pieces 120 are stacked to form a stator core; the welding part includes: at least two welding points; along the axial direction of the stator core, the thickness of the stator punching piece 120 is H1 , the thickness of the stator core is H2; the stator core is provided with at least two welding points along an edge extending radially of the stator 100, and along the axial direction of the stator core, the distance between two adjacent welding points is D, H1, H2 and D satisfy, D/H1<H2/D≤H2/H1.

For the stator 100 provided in this embodiment, in order to reduce the processing difficulty of the stator 100 and improve the slot fill rate of the motor, the stator 100 is configured as a split structure. The stator 100 includes a plurality of stator blocks 110 . By arranging a plurality of stator punching blocks 110, only a plurality of stator punching blocks 110 can be processed when processing the stator 100, and then a plurality of stator punching blocks 110 parts are assembled into the stator 100, compared with processing a complete For the stator 100, the difficulty of processing the stator block 110 is reduced, thereby reducing the production cost. The stator 100 has a simple structure, and the automatic production of the stator 100 can be realized through an automated production line.

Moreover, the stator 100 is designed as a split splicing structure, which is convenient for coil winding. Specifically, the coil is wound on the tooth portion 111, and two adjacent sub-blocks can be punched after the coil winding is completed. 115 is installed to reduce the difficulty of winding coils. Therefore, when the size of the stator 100 is the same, more coils can be wound, and the number of turns of the coils can be increased, which is beneficial to improving the slot fill rate of the motor. On the basis of not increasing the size of the motor, the number of turns of the coil is increased, so the output torque of the motor and the efficiency of the motor can be improved.

Two adjacent stator punching blocks 110 are connected by welding, and a plurality of block punching pieces 115 are stacked to form a block punching piece 115. The block punching pieces 115 have been processed into an integral structure, for example, by rivets A plurality of segment punching pieces 115 are fixed in the axial direction, so there is no need to set welding points on each stator punching piece 120 , for example, welding points can be arranged at intervals on stator punching pieces 120 of different layers. When the thickness of the stator punch 120 is small, the welding points can be arranged at intervals on the stator punch 120 of different layers; Welding points are arranged between the block punches 115 . In the following description, welding points are provided on each layer of the stator punching sheet 120 for illustration.

The number of welding points is positively correlated with the thickness of the stator punching piece 120. In order to ensure the connection stability of two adjacent block punching pieces 115, the greater the thickness of the stator punching piece 120, the more the number of welding points, for example There are 10 welding points on one stator punching piece 120 . However, as the number of superimposed stator punching pieces 120 increases, the thickness of the stator core increases, and the stability of both ends of the stator core along the axial direction becomes poorer. Therefore, as the thickness of the stator core increases, each The number of welding points on the stator stamping 120 also needs to be increased. Exemplarily, when the number of stator punches 120 is 5, the number of welding points on each stator punch 120 is 10; when the number of stator punches 120 is 10, each stator punch 120 has The number of welding points is 12.

By limiting the thickness of the stator punch 120, the thickness of the stator core, and the proportional relationship between the distance between two adjacent welding points, it is possible to reduce the number of welding points on the basis of ensuring the welding strength and avoid excessive welding points. resulting in excessive eddy current losses.

Compared with the way of connection welding, two adjacent stator punch blocks 110 are connected by spot welding, the specific power loss generated by pulse spot welding is lower, and the relative magnetic permeability of the motor sample is higher, reducing magnetic flux leakage , can weaken the eddy current loss in the stator, thereby reducing the heat loss of the stator core, preventing the magnetic field from weakening, and avoiding the reduction of motor efficiency.

In a possible embodiment, the stator block 110 includes: a tooth portion 111 and a yoke portion 112, the yoke portion 112 is disposed on the side of the tooth portion 111 away from the axis of the stator 100, the welding portion 130 is disposed on the yoke portion 112, The distance between the welding part 130 and the outer circumference of the yoke part 112 is smaller than the distance between the welding part 130 and the inner circumference of the yoke part 112 .

In this embodiment, the welding portion 130 is disposed on the yoke portion 112, and the distance between the welding portion 130 and the outer periphery of the yoke portion 112 is smaller than the distance between the welding portion 130 and the inner periphery of the yoke portion 112, that is, the welding portion 130 is closer to the outer periphery of the yoke portion 112. , so in this application, no complete welding structure is provided between two adjacent stator punching blocks 110, but a welding part 130 is provided at a part of the connection between two adjacent stator punching blocks 110, compared to connection welding The method of connecting two adjacent stator punching blocks 110 by setting a part of the welding part 130 at the connection can weaken the eddy current loss in the stator 100, thereby reducing the heat loss of the stator core, preventing the magnetic field from weakening, and avoiding the motor Reduced efficiency. Moreover, on the basis that only a part of the welding portion 130 is provided between two adjacent stator punching blocks 110 , the welding portion 130 is placed closer to the outer periphery of the yoke portion 112 , which can improve the structural stability of the stator 100 .

In a possible embodiment, the welding part 130 is disposed on the outer periphery of the yoke part 112 to further improve the structural stability of the stator 100 .

In a possible application, two adjacent block punching pieces 115 are welded by adaptive pulse laser spot welding technology, and the adaptive pulse laser spot welding can interrupt welding to reduce eddy current loss caused by continuous welding.

In other embodiments, laser welding may also be used to connect two adjacent block punches 115 .

In a possible embodiment, the welding points include: a first welding point and a second welding point, the first welding point is set on an edge of the stator block 110 extending radially along the stator 100; the second welding point is set on the stator The punch block 110 extends along the other edge of the stator 100 in the radial direction, and along the axial direction of the stator 100 , the first welding point and the second welding point are distributed in a dislocation manner.

In this embodiment, the first welding point and the second welding point are respectively located on both sides of the block punching sheet 115, wherein, along the axial direction of the stator 100, the first welding point and the second welding point are misaligned, so, along The segmented punching piece 115 of the stator 100 is taken radially, and the first welding spot and the second welding spot are not in the same section. The welding positions on both sides of the block punches 115 are staggered, which can effectively improve the welding strength of two adjacent block punches 115 .

Since the dislocation distribution of the first soldering point and the second soldering point can improve the welding strength of two adjacent stator punching blocks 110, a stronger welding strength can be achieved with as few soldering points as possible, and Welding effect, reducing the number of welding spots as much as possible can further weaken the eddy current loss in the stator 100, thereby reducing the heat loss of the stator core, preventing the magnetic field from weakening, and avoiding the reduction of motor efficiency.

In a possible embodiment, the segment punching piece 115 includes: a first connecting portion 113 and a second connecting portion 114 , the first connecting portion 113 is arranged on an edge of the yoke portion 112 extending radially along the stator punching piece 120 The second connecting portion 114 is arranged on the other edge of the yoke portion 112 extending radially along the stator punching sheet 120, and the first connecting portion 113 of a block punching sheet 115 can be connected to the second of the adjacent block punching sheet 115; The connecting portion 114 is matched.

In this embodiment, a first connecting portion 113 and a second connecting portion 114 are provided on the segment punching sheet 115 . Specifically, the first connecting portion 113 is arranged on one edge extending radially along the stator punching piece 120 , and the second connecting portion 114 is arranged on the other edge extending radially along the stator punching piece 120 , that is, the first connecting portion 113 The second connecting portion 114 and the second connecting portion 114 are respectively provided on both sides of the segment punching piece 115 along the circumferential direction of the stator punching piece 120 . The first connecting portion 113 of one block punching sheet 115 cooperates with the second connecting portion 114 of another adjacent block punching sheet 115 , so as to realize the connection of the two block punching sheets 115 . A plurality of block punching pieces 115 are arranged along the circumferential direction of the stator 100, so that any two adjacent block punching pieces 115 are matched through the first connecting portion 113 and the second connecting portion 114, thereby realizing multiple block The connection between the punching pieces 115 thus forms the stator 100 .

The arrangement of the first connecting portion 113 and the second connecting portion 114 on the segmented punches 115 can improve the connection stability of the adjacent segmented punches 115 and prevent two adjacent segmented punches 115 from shaking.

In a possible embodiment, the first connecting part 113 is configured as a protruding part, and the second connecting part 114 is configured as a groove adapted to the protruding part.

In this embodiment, the first connecting part 113 is configured as a protrusion, and the second connecting part 114 is configured as a groove, that is, the first connecting part 113 and the second connecting part 114 are a concave-convex structure. , the groove fits with the protruding piece to realize the connection and fit between the first connecting part 113 and the second connecting part 114 .

By setting the first connecting part 113 as a protruding part and setting the second connecting part 114 as a groove matched with the protruding part, a concave-convex fit is formed between the first connecting part 113 and the second connecting part 114. The structure improves the connection reliability and reduces the difficulty of processing.

As shown in FIG. 3 and FIG. 4 , in a possible embodiment, the yoke 112 includes an inner contour section extending along the circumference of the stator punch 120 , and the inner contour section includes a first contour section 123 and a second contour section connected to each other. Contour segment 124, one end of the first contour segment 123 is connected with the dedendum of the tooth portion 111, and the other end of the first contour segment 123 is connected with the second contour segment 124; wherein, the first contour segment 123 is a straight line segment, and the second contour segment Segment 124 is an arc segment.

In this embodiment, toward the inner side of the stator 100, the yoke portion 112 is provided with an inner contour segment extending along the circumferential direction of the stator punching plate 120, specifically, the inner contour segment starts from the tooth root of the tooth portion 111 and ends at the yoke portion 112 is along the radially extending edge of the stator punching piece 120 , and the segmented punching piece 115 is respectively provided with inner contour segments on both sides of the tooth portion 111 .

Specifically, the inner contour segment includes a first contour segment 123 and a second contour segment 124 , and the first contour segment 123 is connected to the second contour segment 124 . Wherein, one end of the first contour segment 123 is connected to the dedendum of the tooth portion 111, the other end of the first contour segment 123 is connected to the second contour segment 124, and one end of the second contour segment 124 is connected to the first contour segment 123. The other end of the second profile section 124 is connected to the side of the yoke 112 extending radially along the stator punching plate 120 . The shapes of the first contour segment 123 and the second contour segment 124 are different, specifically, the first contour segment 123 is a straight line segment, and the second contour segment 124 is an arc segment.

Since the second profile segment 124 is connected to the edge of the yoke 112 extending radially along the stator punching piece 120, the inner circumference of the yoke 112 near the radial edge is an arc-shaped structure, so two adjacent block punching pieces 115 When they are spliced together, the joint between two adjacent block punches 115 located on the inner periphery of the yoke 112 forms an arc angle.

If the inner circumference of the yoke 112 is a straight line segment, when two adjacent block punches 115 are spliced together, the two adjacent block punches 115 form an angle at the joint of the inner circumference of the yoke 112, and the yoke The width of 112 at the angle position is relatively thin, resulting in poor structural stability of the stator stamping 120 . When the stator is assembled with other components, the stator stamping 120 is easily deformed by extrusion.

In this application, the splicing of two adjacent block punches 115 located on the inner circumference of the yoke 112 is set as a circular arc angle, which can effectively avoid the problem of poor structural stability caused by the too small width of the yoke 112. On the basis of the structure of the stator stamping 120, the stator stamping 120 is not easy to be deformed, and the loss of the stator core is avoided from increasing. Moreover, since the stator punching plate 120 is not easy to be deformed, the gap between the stator and the rotor is not easy to change, thereby avoiding the problem of increased noise.

As shown in FIG. 3 and FIG. 4 , in a possible embodiment, the stator can cooperate with the rotor; the length of the first contour segment 123 is L2, the length of the second contour segment 124 is L3, and the number of pole pairs of the rotor is P, where the relationship between L2, L3 and P satisfies: 0.4≤(L2/L3)/P≤1.9.

In this embodiment, when the length of the second profile segment 124 is too large, the length of the first profile segment 123 is small, and the space of the stator slot will be reduced at this time. When the length of the second contour section 124 is too small, the length of the first contour section 123 is relatively large, and at this time, the yoke 112 will appear in a position with a small width. Therefore, it is necessary to adjust the length ratio of the first profile segment 123 and the second profile segment 124 to avoid the position of the yoke 112 having a smaller width on the basis of ensuring the slot space of the stator. In addition, the ratio of the first contour segment 123 to the second contour segment 124 will also affect the magnetic density saturation, so combining the ratio of the first contour segment 123 to the second contour segment 124 and the number of pole pairs of the rotor, it is defined that 0.4≤ (L2/L3)/P≤1.9, to avoid the problem of magnetic density saturation.

As shown in FIG. 3 , in a possible embodiment, a groove body 121 is provided on the side of the yoke portion 112 away from the tooth portion 111, that is, a groove body 121 is opened on the outer periphery of the stator 100, and the groove body 121 can be enlarged. The distance between the stator 100 and other components located on the outer peripheral side of the stator 100 is conducive to the oil return of the compressor 300 , improves the smoothness of oil return, and is beneficial to improve the operation stability of the compressor 300 .

A large number of coils are usually wound in the stator slot, resulting in a small space for the oil supply to circulate in the stator slot, and opening the slot body 121 on the stator 100 can increase the circulation area of the oil return.

The slot body 121 includes a trapezoidal slot. The trapezoidal trough 121 is convenient for clamping with the tooling, so that the tooling can drive a plurality of block punches 115 to move. During the winding process, a plurality of sub-block punches 115 are distributed in a straight line, and after the winding is completed, the tooling drives the plurality of sub-block punches 115 to form a stator punch 120 . Setting the groove body 121 as a trapezoidal groove can improve the convenience for the tooling to drive the block punching piece 115 to move.

In a possible application, the other slots 121 in the plurality of slots 121 except the trapezoidal slots are rectangular. By setting at least one slot body 121 as a rectangular slot, the rectangular slot can be used as an identification slot through which the positioning of the motor can be realized, thereby facilitating the assembly of the motor to the compressor.

In a possible embodiment, the yoke portion 112 is cut along the radial direction of the stator punching plate 120 , and the groove body 121 passes through the centerline of the cross section of the yoke portion 112 .

In this embodiment, the groove body 121 passes through the center line of the yoke 112 , which can further improve the oil return effect, improve the oil return smoothness, and help improve the operation stability of the compressor 300 .

In a possible embodiment, the stator 100 further includes: an aluminum coil wound around the teeth 111 .

In this embodiment, the material of the coil wound on the tooth portion 111 is limited. The material of the coil is aluminum, that is, the coil is formed by winding an aluminum wire around the tooth portion 111. The unit price of the aluminum wire is low, and the aluminum wire is used The winding is set as a coil, which can largely reduce the material cost of the motor.

As shown in FIG. 6 , in the embodiment of the present application, a motor is proposed, the motor includes: a stator assembly and a rotor 200, and the rotor 200 is arranged in the stator 100. The stator assembly includes the stator as in any one of the above embodiments and the winding wound on the stator 100 .

In a possible embodiment, the rotor 200 is taken along the radial direction of the rotor 200 , and the outer contour of the cross section of the rotor 200 is a circle.

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 the circle passing through the outermost contour of the rotor 200 is set as the contour A circle, that is, the contour circle of the radial section of the rotor 200 passes through the point or line farthest from the center of the rotor 200 radial section, and the contour circle passes through the axis of the rotor 200. If the radial cross section of the rotor 200 is a regular circle, then the contour circle and the rotor The outer edges of the 200 radial sections coincide.

Further, the outer contour of the rotor 200 may be circular. It can be understood that during the working process of the motor, the rotor 200 is in a rotating state, and setting the outer contour of the rotor 200 as a circle can effectively reduce the wind loss generated by the rotor 200 during rotation and improve the working efficiency of the motor.

In a possible embodiment, the motor further includes: a plurality of flux guide slots, and the plurality of flux guide slots are arranged through the rotor 200 along the axial direction of the motor.

In this embodiment, the rotor 200 is also provided with a plurality of flux guide slots. Specifically, the rotor 200 is formed by stacking a plurality of rotor punches 210, and any rotor punch 210 is provided with a plurality of magnetic flux guide grooves, and the magnetic flux guide grooves are distributed through the rotor punches 210 along the axial direction of the motor. That is, the rotor punches 210 are distributed through the axial direction of the motor. Understandably, during the operation of the motor, radial electromagnetic force waves will be generated, and the electromagnetic force waves will cause increased noise. In order to improve the noise problem of the motor, a plurality of flux guide slots are arranged on the rotor 200 along the axial direction of the motor, so that the lowest order radial electromagnetic force wave of the motor can be reduced, thereby reducing the noise caused by the radial electromagnetic force wave .

By setting a plurality of flux guide slots on the rotor 200, and making the flux guide slots penetrate and distribute in the rotor 200 along the axial direction of the motor, the lowest order radial electromagnetic force wave of the motor can be reduced, thereby reducing the radial electromagnetic force wave caused by the radial electromagnetic force wave. the resulting noise.

As shown in FIG. 5 , a first magnet slot 211 and a second magnet slot 212 are provided on the rotor punching piece 210, and the rotor 200 also includes a first magnetic piece and a second magnetic piece, and the first magnetic piece and the second magnetic piece are respectively mounted on A pair of magnetic poles are formed in the first magnet slot 211 and the second magnet slot 212 .

In a possible embodiment, the rated torque of the motor is T1, the inner diameter of the stator 100 is Φ2, and the torque per unit volume of the rotor 200 is T2, where T1, Φ2 and T2 satisfy:

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 punching plate and the torque per unit volume of the rotor is limited. It can be understood that the combined variable among the rated torque of the motor, the inner diameter of the stator punch and the torque per unit volume of the rotor affects the output torque of the motor. By limiting the range of the combined variable, the motor can be The output torque meets the needs of the equipment the motor is set on.

Specifically, the rated torque of the motor is T1, the inner diameter of the stator punch is Φ2, and the torque per unit volume of the rotor is T2, where T1, Φ2 and T2 satisfy:

5.18×10 ^-7 ≤T1×Φ2 ^-3 ×T2 ^-1 ≤1.17×10 ^-6 ,

5kN•m•m ^-3 ≤T2≤45kN•m•m ^-3 .

By limiting the combined variable between the rated torque of the motor, the inner diameter of the stator punch and the torque per unit volume of the rotor, it is greater than or equal to 5.18×10 ^-7 and less than or equal to 1.17×10 ^-6 , and the rotation per unit volume of the rotor is limited. The torque is greater than or equal to 5kN•m•m ^-3 and less than or equal to 45kN•m•m ^-3 , so that the output torque of the motor can meet the requirements of the equipment set by the motor.

As shown in FIG. 6 , in the embodiment of the present application, a compressor 300 is proposed. The compressor 300 includes: a compression component 310 and a motor in any of the above possible embodiments, and the motor is connected to the compression component 310 .

Specifically, the compression part 310 includes a cylinder 311 and a piston 312. In order to connect the motor to the compression part 310 and drive the compression part 310 to run, some connecting parts are also provided in the compressor 300, specifically including a crankshaft 320 and a main bearing 330. With the auxiliary 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. The main bearing 330 and the auxiliary bearing 340 are arranged on the outside of the crankshaft 320 to support and limit the crankshaft 320, so that the crankshaft 320 can Turn normally.

Since the compressor 300 proposed in this embodiment includes the motor proposed in the above embodiments, the compressor 300 has all the beneficial effects of the motor provided in any of the above possible embodiments.

In the embodiments of the present application, an electrical device is proposed. The electrical device includes: a device body and the compressor in the above embodiment, and the compressor is connected to the device body.

In this application, the term "plurality" means two or more, unless otherwise clearly defined. The terms "installation", "connection", "connection", "fixed" and other terms should be interpreted in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be directly or indirectly through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in this application In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

A stator, comprising:

Multiple stator blocks;

The stator punching block includes: a plurality of stacked block punching sheets, along the circumferential direction of the stator, a plurality of the block punching sheets are connected to form a stator punching sheet;

A plurality of the stator punches are laminated to form a stator core;

The welding part is provided on the edge of the stator punching block extending radially along the stator, and the welding part is used to connect two adjacent stator punching blocks;

The welding portion includes: at least two welding points;

Along the axial direction of the stator core, the thickness of the stator punch is H1, and the thickness of the stator core is H2;

The stator core is provided with at least two welding points along an edge extending radially of the stator, and the distance between two adjacent welding points along the axial direction of the stator core is D, H1, H2 and D satisfy, D/H1<H2/D≤H2/H1.
The stator of claim 1, wherein said stator block comprises:

teeth;

The yoke part is provided on a side of the tooth part away from the axial center of the stator, the welding part is provided on the yoke part, and the welding part is provided on the outer periphery of the yoke part.
The stator of claim 2, wherein said segmented stampings comprise:

The first connecting part is arranged on an edge of the yoke extending radially along the stator punch;

The second connecting part is arranged on the other edge of the yoke extending radially along the stator punching sheet, the first connecting part of one block punching sheet can be connected to the adjacent block punching sheet The second connecting part of the
A stator according to claim 3, wherein,

The first connecting part is configured as a protruding part, and the second connecting part is configured as a groove adapted to the protruding part.
A stator according to any one of claims 2 to 4, wherein,

The yoke includes an inner profile segment extending along the circumference of the stator punch, the inner profile segment includes a first profile segment and a second profile segment connected, one end of the first profile segment is connected to the tooth The dedendum of the part is connected, and the other end of the first profile segment is connected with the second profile segment;

Wherein, the first contour segment is a straight line segment, and the second contour segment is an arc segment.
A stator according to claim 5, wherein said stator is cooperable with a rotor;

The length of the first contour segment is L2, the length of the second contour segment is L3, and the number of pole pairs of the rotor is P, wherein the relationship between L2, L3 and P satisfies: 0.4≤(L2/L3) /P≤1.9.
The stator according to any one of claims 2 to 6, wherein the stator further comprises:

Aluminum coils are wound around the teeth.
A motor, wherein the motor includes:

a stator assembly comprising a stator as claimed in any one of claims 1 to 7 and a winding wound on said stator;

The rotor is arranged in the stator.
The electric machine according to claim 8, wherein,

The rotor is cut along the radial direction of the rotor, and the outer contour of the cross section of the rotor is circular.
The motor according to claim 8 or 9, wherein the motor further comprises:

A plurality of magnetic flux guide slots are arranged through the rotor along the axial direction of the motor.
The motor according to any one of claims 8 to 10, wherein the rated torque of the motor is T1, the inner diameter of the stator is Φ2, and the torque per unit volume of the rotor is T2, wherein T1, Satisfied between Φ2 and T2:

5.18×10 -7 ≤T1×Φ2 -3 ×T2 -1 ≤1.17×10 -6 ,

5kN•m•m -3 ≤T2≤45kN•m•m -3 .
A compressor, including:

An electric machine as claimed in any one of claims 8 to 11; and

A compression component, the motor is connected to the compression component.
An electrical device, comprising:

the body of the device; and

The compressor according to claim 12, said compressor being connected to said apparatus body.