WO2023103694A1

WO2023103694A1 - Stator, motor, compressor and electrical apparatus

Info

Publication number: WO2023103694A1
Application number: PCT/CN2022/130773
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: 2022-11-09
Publication date: 2023-06-15
Also published as: CN114094732A; CN114094732B

Abstract

Provided are a stator, a motor, a compressor and an electrical apparatus. The stator is capable of cooperating with the rotor, and comprises: a plurality of block iron cores detachably connected to each other. Each of the plurality of block iron cores comprises: a tooth part; and a yoke part, connected to the tooth part and comprising at least two inner contour sections extending in the circumferential direction of the stator, the at least two inner contour sections comprising first contour sections and second contour sections which are connected, one end of each first contour section being connected to the tooth root of the tooth part, and the other end of each first contour section being connected to the corresponding second contour section. The first contour sections have a length of L1, the second contour sections have a length of L2, the number of rotor pole pairs is P, and the L1, L2 and P satisfy: 0.4 ≤ (L1/L2)/P ≤ 1.9. In the application, the thickness of a stator yoke is ensured, and the problem of magnetic saturation in the operation process of the motor is avoided.

Description

Stators, motors, compressors and electrical equipment

This application claims the priority of the Chinese patent application with the application number "202111492598.7" 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 stator in the prior art is difficult to ensure the thickness of the stator yoke.

technical problem

The magnetic density saturation is easy to occur during the operation of the motor.

technical solution

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

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

A second aspect of the present application proposes an electric machine.

A third aspect of the present application proposes a compressor.

A fourth aspect of the present application provides an electrical device.

In view of this, according to the first aspect of the application, a stator is proposed, the stator can cooperate with the rotor, and the stator includes: a plurality of segmented iron cores, which are detachably connected to each other; a plurality of segmented iron cores Any segmented iron core in the core includes: teeth; A profile segment and a second profile segment, one end of the first profile segment is connected to the root of the tooth, and the other end of the first profile segment is connected to the second profile segment; wherein, the length of the first profile segment is L1, and the length of the second profile The length of the segment is L2, and the number of rotor pole pairs is P, wherein the relationship between L1, L2 and P satisfies: 0.4≤(L1/L2)/P≤1.9.

In addition, according to the stator in the above technical solution provided by this application, it may also have the following additional technical features:

In a possible design, the first contour segment is a straight line segment, and the second contour segment is an arc segment.

In a possible design, the stator further includes: a slot disposed on a side of the yoke away from the teeth.

In a possible design, the groove body includes trapezoidal grooves.

In a possible design, the yoke is cut along the radial direction of the stator, and the groove passes through the centerline of the section of the yoke.

In a possible design, the stator further includes: aluminum coils wound around the teeth.

According to the second aspect of the present application, a motor is proposed, including: a stator assembly, the stator assembly includes the stator as described in the first aspect above and a winding wound on the stator; a rotor is arranged in the stator.

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

In addition, according to the motor in the above technical solution provided by this application, it may also have the following additional technical features:

In a possible design, the stator further includes: an escape notch, which is arranged on the surface of the tooth portion facing the rotor, and the avoidance notch is arranged at the first end of the tooth portion; the tooth portion also includes a second end away from the first end. End, along the rotation direction of the rotor, the rotor passes through the first end and the second end in turn.

In a possible design, the rotor is taken along the radial direction of the rotor, and the outer contour of the cross-section of the rotor is circular.

In a possible design, the motor further includes: a plurality of magnetic flux guide slots disposed through the rotor along the axial direction of the motor.

In a possible design, the rated torque of the motor is T1, the inner diameter of the stator is Φ1, and the torque per unit volume of the rotor is T2, where T1, Φ1 and T2 satisfy:

5.18×10 ^-7 ≤T1×Φ1 ^-3 ×T2 ^-1 ≤1.17×10 ^-6 ,

5kN•m•m ^-3 ≤T2≤45kN•m•m ^-3 .

According to the third aspect of the present application, a compressor is proposed, including: the motor as described in the second aspect above; and a compression component, the motor is connected to the compression component.

According to the fourth aspect of the present application, an electrical device is provided, including: a device main body; and a compressor as in the above third aspect, and the compressor is connected to the device main body.

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 a schematic structural view of a stator according to an embodiment of the present application;

Fig. 2 shows a schematic structural view of a segmented iron core according to an embodiment of the present application;

Fig. 3 shows a schematic structural view of a rotor punch according to an embodiment of the present application;

Fig. 4 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. 4 is:

100 stator, 110 sub-block iron core, 112 yoke, 1121 first profile section, 1122 second profile section, 114 tooth section, 120 slot body, 200 rotor, 210 rotor punching piece, 211 first magnetic steel slot, 212 section Two magnetic steel grooves, 300 compressors, 310 compression components, 311 cylinders, 312 pistons, 320 crankshafts, 330 main bearings, and 340 auxiliary bearings.

Embodiments of the present 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 an electrical device according to some embodiments of the present application are described below with reference to FIGS. 1 to 4 .

实施例一：Embodiment one:

As shown in Figure 1 and Figure 2, a stator 100 is provided in the first embodiment of the present application, the stator 100 can cooperate with the rotor, the stator 100 includes a plurality of segmented iron cores 110, and the plurality of segmented iron cores The cores 110 are detachably connected, and any segmented iron core 110 in the plurality of segmented iron cores 110 includes: a tooth portion 114 and a yoke portion 112 .

Wherein, the yoke portion 112 is connected with the tooth portion 114, the yoke portion 112 includes at least two inner contour segments extending along the circumferential direction of the stator, and the at least two inner contour segments include connecting a first contour segment 1121 and a second contour segment 1122, One end of the first profile segment 1121 is connected to the dedendum of the tooth portion 114, and the other end of the first profile segment 1121 is connected to the second profile segment 1122;

Wherein, the length of the first contour segment 1121 is L1, the length of the second contour segment 1122 is L2, and the number of rotor pole pairs is P, wherein, the relationship between L1, L2 and P satisfies: 0.4≤(L1/L2)/P≤ 1.9.

The present embodiment provides that the stator core in the stator is a split core, and the stator core includes a plurality of segmented iron cores 110 , and the plurality of segmented iron cores 110 are detachably connected. Specifically, a plurality of segmented iron cores 110 are connected end to end and spliced along the circumferential direction to form a stator iron core. A connection device can be provided between two adjacent segmented iron cores 110 to detachably connect the two segmented iron cores 110, and a connection structure can also be provided at the ends of the segmented iron cores 110 to realize two segmented cores. The connections between the cores 110 are separated. By setting the segmented iron core 110 as a structure that can be detachably connected to each other, when processing the stator core, only a plurality of segmented iron cores 110 can be processed, and then the parts of the plurality of segmented iron cores 110 are assembled into a stator iron core. core, compared with processing a complete stator core, the difficulty of processing the segmented iron core 110 parts is reduced, thereby reducing the production cost. This kind of stator has a simple structure, and the automatic production of the stator can be realized through an automated production line, and the The stator is designed as a split splicing structure, which is conducive to improving the slot fullness of the motor.

The shape and structure of each segmented iron core are the same, and one of the plurality of segmented iron cores is taken as an example for description.

The segmented iron core includes a tooth portion 114 and a yoke portion 112 , wherein the yoke portion 112 is connected to the tooth portion 114 . When a plurality of segmented stators are spliced into a stator core, the yoke 112 is disposed on a side close to the outer edge of the stator core, and the tooth portion 114 is disposed on a side close to the inner edge of the stator core. Each yoke portion 112 corresponds to a tooth portion 114 , and a stator yoke can be obtained by splicing a plurality of yoke portions 112 , and the plurality of tooth portions 114 are located on the inner sidewall of the spliced stator yoke.

The teeth 114 are capable of carrying stator windings, and the yoke 112 connects the plurality of teeth 114 to each other. The yoke portion 112 is enclosed in an approximately ring shape, and the tooth portion 114 is disposed on an inner sidewall of the approximately ring-shaped yoke portion 112 . The yoke 112 is provided with at least two inner contour segments extending along the circumferential direction of the stator toward the inner side of the stator, specifically, at least two inner contour segments are connected end to end in sequence, and at least two inner contour segments start from the tooth portion 114 The dedendum ends at the edge of the yoke portion 112 extending radially along the stator, and the block punching piece is respectively provided with inner contour segments on both sides of the tooth portion 114 .

Specifically, the inner contour segment includes a first contour segment 1121 and a second contour segment 1122 , and the first contour segment 1121 is connected to the second contour segment 1122 . Wherein, one end of the first profile segment 1121 is connected to the dedendum of the tooth portion 114, the other end of the first profile segment 1121 is connected to the second profile segment 1122, and one end of the second profile segment 1122 is connected to the first profile segment 1121. The other end of the two profile segments 1122 is connected to the side of the yoke 112 extending radially of the stator. The shapes of the first contour segment 1121 and the second contour segment 1122 are different.

The stator can cooperate with the rotor. The length of the first contour segment 1121 is L1, the length of the second contour segment 1122 is L2, and the number of pole pairs of the rotor is P. The relationship between L1, L2 and P satisfies: 0.4≤(L1/L2 )/P≤1.9.

The numerical relationship between the length of the first contour segment 1121, the length of the second contour segment 1122, and the number of pole pairs of the rotor is defined. It can ensure that the stator can be applied to motors with different numbers of pole pairs. Specifically, by setting the length of the first contour segment 1121 and the length of the second contour segment 1122 as L1 and L2 respectively, and setting the number of pole pairs of the rotor as P, and setting the numerical relationship of L1, L2 and P to satisfy : 0.4≤(L1/L2)/P≤1.9. By defining the ratio between the length of the first contour segment 1121, the length of the second contour segment 1122 and the number of pole pairs of the rotor, the length of the first contour segment 1121, the length of the second contour segment 1122 and the poles of the rotor The ratio between logarithms is greater than or equal to 0.4 and less than or equal to 1.9, thereby ensuring the thickness of the yoke portion 112 and avoiding magnetic density saturation.

In some embodiments, the stator is applied to a six-slot four-pole motor, and can also be applied to a nine-slot six-pole motor.

In the related art, the inner side wall of the stator yoke is set as a straight line segment, and in order to wind as many windings as possible on the teeth 114 of the stator, it is difficult to ensure the thickness of the stator yoke 112, resulting in easy motor operation. The problem of magnetic density saturation occurs.

This application considers that the insufficient thickness of the stator yoke will easily lead to the saturation of the magnetic flux density of the motor and the rapid rise of the temperature of the motor. The inner wall of the yoke 112 is provided with at least two inner contour segments. The first profile segment 1121 is arranged to be connected to the dedendum of the tooth portion 114, the second profile segment 1122 of the at least two inner profile segments is connected to the first profile segment 1121, and the first profile segment 1121, the second profile The relationship between the section 1122 and the number of pole pairs of the rotor is limited, which is beneficial to ensure the thickness of the stator yoke 112 and avoids the problem of magnetic density saturation during the operation of the motor.

As shown in FIG. 1 , in any of the above embodiments, the first contour segment 1121 is a straight line segment, and the second contour segment 1122 is an arc segment.

In this embodiment, the first contour segment 1121 close to the tooth root of the tooth portion 114 in the stator yoke 112 is set as a straight line segment, and the second contour segment connected to the first contour segment 1121 is set as an arc segment . After splicing a plurality of segmented iron cores, both sides of the tooth root of the tooth part 114 are connected with a first profile segment 1121 , and a second profile segment 1122 is connected between two adjacent first profile segments 1121 . By setting the second profile segment 1122 connected between the two first profile segments 1121 as an arc segment, the thickness of the stator yoke 112 can be ensured.

In the related art, splicing is done through the contour segments of two straight segments, which will make the thickness of the stator yoke 112 thinner at the position where the two straight segments are spliced, thus affecting the strength of the stator yoke 112. It is easy to cause deformation of the stator yoke 112 .

In this embodiment, the first contour segment 1121 close to the tooth root of the tooth part 114 is set as a straight line segment, and the second contour segment 1122 connected with the first contour segment 1121 is set as an arc segment, so as to ensure the stability of the stator yoke. Under the premise of the thickness of 112, the size of the stator slot can also be made larger, thereby accommodating more windings, and improving the performance and durability of the motor using the segmented stator.

As shown in FIG. 1 and FIG. 2 , in any of the above embodiments, the wall surface of the tooth portion 114 facing the axial center of the stator is an arc surface; and/or the wall surface of the yoke portion 112 away from the axial center of the stator is an arc surface.

In this embodiment, the wall surface of the tooth portion 114 facing the axial center of the stator is set as an arc surface, and/or the wall surface of the yoke portion 112 away from the axis center of the stator is set as an arc surface.

As shown in FIG. 1 and FIG. 2 , in any of the above embodiments, the stator 100 further includes: a slot body 120 disposed on a side of the yoke portion 112 away from the tooth portion 114 , and the slot body 120 is roughly trapezoidal.

In this embodiment, a groove body 120 is provided on the side of the yoke portion 112 away from the tooth portion 114, that is, a groove body 120 is formed on the outer periphery of the stator, and the groove body 120 can increase the distance between the stator and other components located on the outer peripheral side of the stator. The distance between them is beneficial to the oil return of the compressor 300, the smoothness of the oil return is improved, and the operation stability of the compressor 300 is improved.

As shown in FIG. 1 and FIG. 2 , in any of the above embodiments, the yoke 112 is taken along the radial direction of the stator 100 , and the slot body 120 passes through the centerline of the section of the yoke 112 .

In this embodiment, the groove body 120 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 any of the above embodiments, the groove body includes a trapezoidal groove. The trapezoidal trough is convenient for clamping with the tooling, so that the tooling can drive multiple block punches to move. During the winding process, multiple sub-block punches are distributed in a straight line. After the winding is completed, the tooling drives the multiple sub-block punches to form a stator. Setting the trough body as a trapezoidal trough can improve the convenience for the tooling to drive the segmented punching sheet to move.

In a possible application, the grooves except the trapezoidal groove among the plurality of grooves are rectangular. By setting at least one slot body as a rectangular slot, the rectangular slot can be used as an identification slot, and the positioning of the motor can be realized through the identification slot, thereby facilitating the assembly of the motor to the compressor.

In any of the above embodiments, the stator further includes: an aluminum coil wound around the teeth 114 .

In this embodiment, the material of the coil wound on the tooth portion 114 is limited. The material of the coil is aluminum, that is, the coil is formed by winding an aluminum wire around the tooth portion 114. 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.

实施例二：Embodiment two:

As shown in FIG. 1 , FIG. 2 and FIG. 3 , a second embodiment of the present application provides a motor, including: a stator assembly and a rotor 200 .

Wherein, the stator assembly includes a stator and a winding wound on the stator, and the stator 100 is selected as the stator 100 in the first embodiment above;

The rotor 200 is set inside the stator.

The motor provided in this embodiment includes a stator assembly, and the stator assembly includes a stator, a rotor 200 and a winding wound on the stator.

Wherein, a stator slot is provided inside the stator, and the rotor 200 is arranged in the stator slot, specifically, the stator and the rotor 200 are arranged through a shaft, and the rotor 200 can rotate relative to the stator. Further, windings are also provided on the stator, specifically, the windings are provided on the teeth of the stator. The stator includes a plurality of teeth 114 . The tooth portion 114 is disposed inside the stator, facing the rotor 200 . The windings are wound on the teeth 114, and the windings are used to generate magnetic induction lines in the energized state. When the rotor 200 rotates relative to the stator, that is, it is equivalent to rotating relative to the windings. The rotor 200 rotating relative to the windings cuts the magnetic induction lines. A force is generated to drive the rotor 200 to rotate, thereby realizing the operation of the motor.

Specifically, the winding can be an aluminum wire, which has the advantages of high conductivity, low heat generation, low density, and low cost. Using aluminum wire as the winding can not only ensure that the performance of the motor meets the use requirements, but also reduce product costs.

The stator includes a stator core, the stator core is provided with a yoke 112 and a plurality of teeth 114 , the plurality of teeth 114 are connected to the yoke 112 , and gaps are provided between the plurality of teeth 114 . The teeth 114 are capable of carrying stator windings, and the yoke 112 connects the plurality of teeth 114 to each other. The yoke portion 112 is enclosed in an approximately ring shape, and the tooth portion 114 is disposed on an inner sidewall of the approximately ring-shaped yoke portion 112 . The inner wall of the yoke portion 112 between two adjacent tooth portions 114 includes two second profile segments 1122 and a first profile segment 1121 located between the two second profile segments 1122 . One ends of the two second contour segments 1122 are respectively connected to the dedendums of two adjacent tooth parts 114 , and the other ends of the two second contour segments 1122 are respectively connected to both ends of the first contour segment 1121 . The shapes of the first contour segment 1121 and the second contour segment 1122 are different, specifically, the first contour segment 1121 is an arc segment, and the second contour segment 1122 is a straight line segment.

In this application, the inner wall of the yoke 112 in the stator is set as the inner contour formed by the first contour segment 1121 of the arc segment and the second contour segment 1122 of the straight segment. By setting the position close to the teeth 114 in the inner wall of the yoke 112 as a straight line segment, and setting the position between two adjacent teeth 114 in the inner wall of the yoke 112 as an arc segment, the yoke of the stator can be effectively improved. The thickness of the portion 112 in the radial direction prevents the stator from magnetic density saturation, avoiding the problem of heating of the stator due to magnetic density saturation, thereby improving the stability of the motor installed with the stator of the present application.

In the related art, the inner side wall of the stator yoke is set as an arc profile with the same thickness, and in order to wind as many windings as possible on the teeth 114 of the stator, it is difficult to ensure the thickness of the stator yoke, resulting in the motor running The problem of magnetic density saturation is prone to occur in the process.

This application considers that the insufficient thickness of the stator yoke 112 will easily lead to the saturation of the magnetic flux density of the motor, which will cause the temperature of the motor to rise rapidly. The inner wall of the yoke 112 close to the tooth The straight line segments are arranged as arc segments, which is beneficial to ensure the thickness of the stator yoke 112 and avoids the problem of flux density saturation during the operation of the motor.

In any of the above-mentioned embodiments, the stator further includes: an avoidance notch, which is arranged on the surface of the tooth portion 114 facing the rotor 200, and the avoidance notch is arranged at the first end of the tooth portion 114; the tooth portion 114 also includes a The second end deviates, along the rotation direction of the rotor 200 , the rotor 200 passes through the first end and the second end in sequence.

In this embodiment, the location of the avoidance gap is defined. Along the rotation direction of the rotor 200, the rotor 200 passes through the first end and the second end in sequence, and the avoidance gap is arranged at the first end of the tooth portion 114, and the avoidance gap is located at the rotor 200. On the opposite side of the 200 rotation direction, by setting the avoidance gap at this position, the magnetic permeance modulation can be performed, which is beneficial to reduce the noise when the motor is running, and is conducive to improving the user experience of the motor.

As shown in FIG. 3 , in any of the above embodiments, the rotor 200 is taken along the radial direction of the rotor 200 , and the outer contour of the cross section of the rotor 200 is circular.

In this embodiment, the rotor 200 is taken along the radial direction of the rotor 200, 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.

In some embodiments, 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 any of the above-mentioned embodiments, the motor further includes: a plurality of magnetic flux guide slots disposed 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.

A first magnetic steel slot 211 and a second magnetic steel 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 the first magnetic steel A pair of magnetic poles are formed in the slot 211 and the second magnetic steel slot 212 .

In any of the above embodiments, the rated torque of the motor is T1, the inner diameter of the stator core is Φ1, and the torque per unit volume of the rotor 200 is T2, where T1, Φ1 and T2 satisfy:

5.18×10 ^-7 ≤T1×Φ1 ^-3 ×T2 ^-1 ≤1.17×10 ^-6 ,

5kN•m•m ^-3 ≤T2≤45kN•m•m ^-3 .

In this embodiment, the range of the combined variable among the rated torque of the motor, the inner diameter of the stator and the torque per unit volume of the rotor 200 is limited. It can be understood that the combined variable between the rated torque of the motor, the inner diameter of the stator and the torque per unit volume of the rotor 200 affects the output torque of the motor. By limiting the range of the combined variable, the output torque of the motor can be made The output torque meets the needs of the equipment for which the motor is set.

Specifically, the rated torque of the motor is T1, the inner diameter of the stator is Φ1, and the torque per unit volume of the rotor 200 is T2, where T1, Φ1 and T2 satisfy:

5.18×10 ^-7 ≤T1×Φ1 ^-3 ×T2 ^-1 ≤1.17×10 ^-6 ,

5kN•m•m ^-3 ≤T2≤45kN•m•m ^-3 .

By limiting the combined variable between the rated torque of the motor, the inner diameter of the stator and the torque per unit volume of the rotor 200 to be greater than or equal to 5.18×10 ^-7 and less than or equal to 1.17×10 ^-6 , and to limit the rotational speed per unit volume of the rotor 200 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.

实施例三：Embodiment three:

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a compressor 300 is provided in the third embodiment of the present application, including: a motor and a compression component 310, wherein the motor is selected as the motor in the second embodiment above motor.

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.

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

Wherein, a stator slot is provided inside the stator, and the rotor 200 is arranged in the stator slot, specifically, the stator and the rotor 200 are arranged through a shaft, and the rotor 200 can rotate relative to the stator. Further, windings are also provided on the stator, specifically, the windings are provided on the teeth of the stator. The stator includes a plurality of teeth 114 . The tooth portion 114 is disposed inside the stator, facing the rotor 200 . The windings are wound on the teeth 114, and the windings are used to generate magnetic induction lines in the energized state. When the rotor 200 rotates relative to the stator, it is equivalent to rotating relative to the windings. The rotor 200 rotating relative to the windings cuts the magnetic induction lines. A force is generated to drive the rotor 200 to rotate, thereby realizing the operation of the motor.

In this application, the inner wall of the yoke 112 in the stator is set as the inner contour formed by the first contour segment 1121 of the arc segment and the second contour segment 1122 of the straight segment. By setting the position close to the teeth 114 on the inner side wall of the yoke 112 as a straight line segment, and setting the position between two adjacent teeth 114 on the inner side wall of the yoke 112 as an arc segment, the yoke of the stator can be effectively improved. The thickness of the portion 112 in the radial direction prevents the stator from magnetic density saturation, avoiding the problem of heating of the stator due to magnetic density saturation, thereby improving the stability of the motor installed with the stator of the present application.

实施例四：Embodiment four:

As shown in FIG. 4 , an electrical device is provided in a fourth embodiment of the present application, including a device body and a compressor 300 . Wherein, the compressor 300 is selected as the compressor 300 in the above-mentioned third embodiment, so it has all the beneficial effects of the compressor 300 in the above-mentioned third embodiment, and will not be repeated here.

The electrical equipment proposed in this embodiment includes a main body of the equipment and a compressor 300, wherein the compressor 300 is connected to the main body of the equipment. When the electrical equipment is running, the compressor 300 cooperates with the main body of the equipment to make the electrical equipment operate normally.

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

It should be clear that in the claims, description and drawings of the present application, the term "plurality" refers to two or more, unless otherwise clearly defined, the terms "upper", "lower", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of more conveniently describing the application and making the description process easier, not to indicate or imply that the referred device or element must have the described specific orientation, construction and operation in a specific orientation, so these descriptions should not be construed as limitations on the present application; the terms "connected", "mounted", "fixed", etc. A fixed connection between multiple objects can also be a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or it can be an intermediary between multiple objects indirectly connected. Those skilled in the art can understand the specific meanings of the above terms in this application according to the specific situation of the above data.

In the claims, description and drawings of the present application, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean specific features and structures described in conjunction with the embodiment or example , material or feature is included in at least one embodiment or example of the present application. In the claims, description and drawings of this application, the 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 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, wherein the stator can cooperate with a rotor, and the stator includes:

A plurality of segmented iron cores, the plurality of segmented iron cores are detachably connected;

Any segmented core in the plurality of segmented cores includes:

teeth;

a yoke connected to the teeth, the yoke comprising at least two inner profile segments extending along the circumference of the stator, the at least two inner profile segments comprising a first profile segment connected to a second profile segment, one end of the first profile segment is connected to the dedendum of the tooth portion, and the other end of the first profile segment is connected to the second profile segment;

Wherein, the length of the first contour segment is L1, the length of the second contour segment is L2, and the number of pole pairs of the rotor is P, wherein, the relationship between L1, L2 and P satisfies: 0.4≤(L1/ L2)/P≤1.9.
The stator according to claim 1, wherein,

The first contour segment is a straight line segment, and the second contour segment is an arc segment.
The stator according to claim 1 or 2, wherein the stator further comprises:

The slot body is arranged on a side of the yoke part away from the tooth part.
The stator according to claim 3, wherein said stator further comprises:

The groove body includes a trapezoidal groove.
A stator according to claim 4, wherein,

The yoke is taken along the radial direction of the stator, and the groove passes through the center line of the section of the yoke.
The stator according to claim 1 or 2, wherein the stator further comprises:

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

a stator assembly comprising a stator as claimed in any one of claims 1 to 6 and a winding wound on said stator;

The rotor is arranged in the stator.
The motor according to claim 7, wherein the stator further comprises:

An avoidance notch is arranged on the surface of the tooth part facing the rotor, and the avoidance notch is arranged at the first end of the tooth part;

The tooth portion further includes a second end away from the first end, and along the rotation direction of the rotor, the rotor passes through the first end and the second end in sequence.
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 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.
An electric machine according to any one of claims 7 to 10, wherein,

The rated torque of the motor is T1, the inner diameter of the stator is Φ1, and the torque per unit volume of the rotor is T2, wherein T1, Φ1 and T2 satisfy:

5.18×10 -7 ≤T1×Φ1 -3 ×T2 -1 ≤1.17×10 -6 ,

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

An electric machine as claimed in any one of claims 7 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.