WO2023103696A1

WO2023103696A1 - Electric motor, compressor and electrical device

Info

Publication number: WO2023103696A1
Application number: PCT/CN2022/130792
Authority: WO
Inventors: 徐飞; 邱小华; 程文; 张肃; 江波; 郑立宇; 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: CN114069907A

Abstract

Provided are an electric motor, a compressor and an electrical device. The electric motor comprises: a stator assembly and a rotor, wherein the stator assembly comprises a stator (100) and a winding; the rotor (200) is arranged in the stator (100); the stator (100) comprises a plurality of stator laminations (210); the stator laminations (210) comprise a plurality of segmented laminations (110) which can be connected in a jointed manner; each segmented lamination (110) comprises a tooth portion (111) and a yoke portion (112); the number of pole pairs of the rotor (200) is p; the maximum rotational speed of the rotor (200) is n; and p and n satisfy: 60<n/p≤100. The stator (100) is designed to be of a split-type assembled structure, thereby facilitating the winding of a coil; and two adjacent segmented laminations (110) can be mounted after the winding of the coil is completed, thereby reducing the difficulty of winding the coil; therefore, when the size of the stator (100) is the same, more coils can be wound, such that the output torque and efficiency of the electric motor can be increased.

Description

Motors, compressors and electrical equipment

This application claims the priority of the Chinese patent application with the application number "202111494414.0" and the application title "Motor, Compressor and Electrical Equipment" filed with the State Intellectual Property Office of China on December 08, 2021, the entire contents of which are incorporated by reference incorporated in this application.

technical field

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

Background technique

In the motor stator in the prior art, the number of turns of the coil wound on the stator is related to the output torque of the motor. In order to increase the output torque of the motor, it is necessary to increase the number of coil turns as much as possible.

technical problem

However, due to the influence of the stator structure, it is difficult to achieve a high slot fill rate during the winding process. In order to wind more coils on the stator, it is necessary to increase the size of the stator, resulting in a larger motor size. Therefore, how to increase the number of turns of the coil without increasing the size of the motor has become an urgent problem to be solved.

technical solution

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

In view of this, in the first aspect, the present application proposes a motor, including: a stator assembly, the stator assembly includes a stator and a winding wound on the stator; the rotor is arranged in the stator; the stator includes: a plurality of stacked stators Punching sheet, the stator punching sheet includes a plurality of block punching sheets that can be spliced and connected; any block punching sheet in the plurality of block punching sheets includes: a tooth portion; a yoke, which is set in the tooth portion away from the axis of the stator punching sheet One side of the center, the side of the yoke away from the teeth is provided with a slot body; the number of pole pairs of the rotor is p, the maximum speed of the rotor is n, and the unit of n is revolution/second, p and n satisfy, 60<n /p≤100.

In a possible design, the groove body includes trapezoidal grooves. 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 plurality of sub-block punches to form a stator punch. Setting the trough body as a trapezoidal trough can improve the convenience for the tooling to drive the segmented punching sheet to move.

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, any block punching piece in the plurality of block punching pieces also includes: a first connection part, which is arranged on an edge of the block punching sheet extending radially along the stator punching sheet; a second connecting portion part, set on the other edge of the radially extending stator punching piece, the first connecting portion of a block punching piece can be splicedly connected with the second connecting portion of the adjacent block punching piece; the first connecting portion is configured Being a protruding part, the second connecting part is configured as a groove adapted to the protruding part.

In a possible design, the number of teeth of the stator is Z, and Z and n satisfy 20<n/Z≤34.

In a possible design, the maximum rotational speed n of the rotor satisfies 120<n≤200.

In a possible design, the stator further includes: an avoidance notch, which is arranged on the surface of the tooth part to face the rotor, and the distance between the avoidance notch and the first tooth shoe of the tooth part is smaller than the distance between the avoidance notch and the second tooth shoe of the tooth part distance; wherein, along the rotation direction of the rotor, the rotor passes through the first tooth shoe and the second tooth shoe in sequence.

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

In a possible design, the outer diameter of the stator punch is R1, the inner diameter of the stator punch is R2, and the relationship between R1 and R2 satisfies: 0.57≥R2/R1≥0.5.

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 punch is R2, and the torque per unit volume of the rotor is T2, where T1, R2 and T2 satisfy:

5.18×10 ^-7 ≤T1×R2 ^-3 ×T2 ^-1 ≤1.17×10 ^-6 , 5kN•m•m ^-3 ≤T2≤45kN•m•m ^-3 .

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

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

Beneficial effect

The stator is designed as a split splicing structure, which is convenient for coil winding. After the coil winding is completed, two adjacent block punches can be installed to reduce the difficulty of coil winding. Therefore, the same stator size can be achieved. Under certain circumstances, more coils are wound and the number of turns of the coils is increased, which is conducive 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.

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 block punching according to an embodiment of the present application;

Fig. 2 shows a schematic structural view of a stator punching sheet 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 block punching, 111 teeth, 1111 first tooth shoe, 1112 second tooth shoe, 112 yoke, 113 first connecting part, 114 second connecting part, 120 stator punching, 121 groove body, 122 avoidance gap, 200 rotor, 210 rotor punch, 211 first magnetic steel groove, 212 second magnetic steel groove, 300 compressor, 310 compression parts, 311 cylinder, 312 piston, 320 crankshaft, 330 main bearing, 340 auxiliary bearing .

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.

Motors, compressors and electrical equipment provided according to some embodiments of the present application are described below with reference to FIGS. 1 to 4 .

As shown in FIG. 1 and FIG. 2, in some embodiments of the present application, a motor is proposed, including: a stator assembly and a rotor 200, the stator assembly includes a stator 100 and a winding wound on the stator 100; the rotor 200 is set In the stator 100; the stator 100 includes: a plurality of stacked stator punches 120, the stator punches 120 include a plurality of block punches 110 that can be spliced and connected; any block punch in the plurality of block punches 110 The sheet 110 includes: a tooth portion, a yoke portion, a first connection portion and a second connection portion, the yoke portion 112 is arranged on the side of the tooth portion 111 away from the axial center of the stator punching plate 120, and the side of the yoke portion 112 away from the tooth portion 111 is A tank body 121 is provided on the side. The first connecting portion 113 is arranged on one edge of the segmented punching sheet 110 extending radially along the stator punching sheet 120; the second connecting portion 114 is arranged on the other edge of the radially extending stator punching sheet 120, and the The first connection part 113 can be connected with the second connection part 114 of the adjacent block punching sheet 110; the first connection part 113 is configured as a protrusion, and the second connection part 114 is configured as a protrusion with the protrusion Suitable grooves; the number of pole pairs of the rotor 200 is p, the maximum rotational speed of the rotor 200 is n, p and n satisfy, 60<n/p≤100.

The motor provided in this embodiment includes a stator assembly, and the stator assembly includes a stator 100 , a rotor 200 and a winding wound on the stator 100 .

Wherein, a stator slot is provided inside the stator 100 , and the rotor 200 is arranged in the stator slot. Specifically, the stator 100 and the rotor 200 are coaxially arranged, and the rotor 200 can rotate relative to the stator 100 . Further, the stator 100 is also provided with windings, specifically, the windings are arranged on the stator teeth. The stator 100 includes stacked stator punches 120 . The stator punches 120 are provided with a plurality of teeth 111 . The teeth 111 of the stator punches 120 are stacked to form a plurality of stator teeth. The stator teeth are disposed inside the stator 100 and facing the rotor 200 . The windings are wound on the stator teeth, and the windings are used to generate magnetic induction lines in the energized state. When the rotor 200 rotates relative to the stator 100, 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.

The stator 100 provided in this embodiment is a split structure. Specifically, the stator 100 includes a plurality of stator punches 120, and the plurality of stator punches 120 are stacked. The shape and structure of each stator punch 120 are the same. The sheets 120 are stacked so that a plurality of stator stamping sheets 120 together constitute the main body of the stator 100 . Compared with designing the stator 100 as an integral structure, the split stator 100 formed by a plurality of stator punches 120 is less difficult to process and easier to maintain and replace.

In order to further reduce the processing difficulty of the iron core of the stator 100 and improve the slot fill rate of the motor, the stator stamping 120 is also configured as a split structure. The stator punching sheet 120 includes a plurality of block punching sheets 110 , and the plurality of block punching sheets 110 can be spliced and connected. Specifically, in order to realize the connection between the segmented punches 110 , a first connecting portion 113 and a second connecting portion 114 are also provided on the segmented stator 100 . Specifically, the first connecting portion 113 is disposed on one edge of the yoke portion 112 radially extending along the stator punching plate 120 , and the second connecting portion 114 is disposed on the other edge of the yoke portion 112 extending radially along the stator punching plate 120 , that is, , the first connecting portion 113 and the second connecting portion 114 are respectively provided on both sides of the segmented punching piece 110 along the circumferential direction of the stator punching piece 120 . The first connecting portion 113 of one block punching sheet 110 cooperates with the second connecting portion 114 of another adjacent block punching sheet 110 , so as to realize the connection of the two block punching sheets 110 . A plurality of block punching pieces 110 are arranged along the circumferential direction of the stator 100, so that any two adjacent block punching pieces 110 are matched through the first connecting portion 113 and the second connecting portion 114, thereby realizing multiple block The connection between the stamping pieces 110 forms the stator stamping piece 120 .

The first connection part 113 and the second connection part 114 can also be separated from each other. In the state where the first connection part 113 and the second connection part 114 are separated, two adjacent block punches 110 are separated from each other, thereby realizing Disassembly of the stator punching 120 . It can be understood that, during the working process of the stator 100, a certain block punching sheet 110 may be damaged. At this time, the damaged block punching sheet can be removed by separating the first connecting portion 113 and the second connecting portion 114. 110 is taken out from the stator punching plate 120, and only the damaged sub-block punching plate 110 is replaced and repaired separately, without replacing the stator punching plate 120 as a whole, which reduces the maintenance cost.

The first connection part 113 and the second connection part 114 can be connected to each other or separated from each other, so that the joint connection between the blocks is realized, and the block punching pieces 110 in the stator 100 can be easily disassembled separately. Make the product easier to repair and reduce product maintenance costs.

By setting the sub-block punches 110 into a structure that can be joined and connected with each other, when processing the stator punches 120, only a plurality of sub-block punches 110 can be processed, and then the parts of the plurality of sub-block punches 110 are assembled into a stator Punching sheet 120, compared with processing a complete stator punching sheet 120, the difficulty of processing parts of block punching sheet 110 is reduced, thereby reducing the production cost. This kind of stator 100 has a simple structure, and the automation of stator 100 can be realized through an automated production line production, and the stator 100 is designed as a split splicing structure, which is convenient for coil winding. After the coil winding is completed, two adjacent block punches 110 can be installed to reduce the difficulty of coil winding. Therefore, when the size of the stator 100 is the same, more coils can be wound, and the number of winding turns of the coils can be increased, which is beneficial to improve the slot fullness ratio 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.

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, and the groove and the protrusion Matched to realize the connection and cooperation 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.

The segmented stator punch 120 includes a tooth portion 111 and a yoke portion 112 , wherein the yoke portion 112 is connected to the tooth portion 111 . When a plurality of segmented stators 100 are spliced into a stator punch 120 , the yoke 112 is disposed near the outer edge of the stator punch 120 , and the teeth 111 are disposed near the inner edge of the stator punch 120 .

Furthermore, the first connecting portion 113 is disposed on one edge of the yoke portion 112 radially extending along the stator punching plate 120 ; the second connecting portion 114 is disposed on the other edge of the yoke portion 112 extending radially along the stator punching plate 120 . By setting the first connection part 113 and the second connection part 114 respectively on the two edges of the yoke 112 extending radially along the stator punching piece 120, any two block punching pieces 110 that are connected randomly The slices 110 are connected to each other, and then surround and form the stator punching slice 120 . The first connection part 113 and the second connection part 114 can be connected to each other or separated from each other, so that the splittable connection between the blocks is realized, and it is easy to separately disassemble the block punches 110 in the stator 100 , making the product easier to repair and reducing product maintenance costs.

The side of the yoke 112 away from the teeth 111 is provided with a groove 121, that is, the outer circumference of the stator 100 is provided with a groove 121, and the groove 121 can increase the distance between the stator 100 and other components located on the outer peripheral side of the stator 100. , so as to facilitate the oil return of the compressor 300, improve the smoothness of the oil return, and help improve the operation stability of the compressor 300.

In a possible embodiment, the groove body 121 includes a trapezoidal groove. The trapezoidal trough 121 is convenient for clamping with the tooling, so that the tooling can drive a plurality of block punches 110 to move. During the winding process, a plurality of sub-block punches 110 are distributed in a straight line, and after the winding is completed, the tooling drives the plurality of sub-block punches 110 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 110 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 application, the yoke 112 is cut along the radial direction of the stator punch 120 , and the slot body 121 passes through the centerline of the cross section of the yoke 112 .

The groove body 121 passing through the center line of the yoke 112 can further improve the oil return effect, improve the oil return smoothness, and help improve the operation stability of the compressor 300 .

The number of pole pairs of the rotor 200 is related to the torque of the motor. However, adjusting the torque simply by limiting the range of the number of pole pairs will easily cause the displacement of the compressor 300 installed with the motor to be difficult to meet the operation requirements. standard. The greater the rotational speed of the rotor 200, the greater the displacement of the compressor 300, and the greater the number of pole pairs, the lower the maximum rotational speed of the rotor 200. Therefore, associating the maximum rotational speed of the rotor 200 with the number of pole pairs of the rotor 200, Limiting the ratio of the maximum rotational speed of the rotor 200 to the number of pole pairs of the rotor 200 between 60 and 100 can reduce the torque with the same displacement, change the operating point of the motor, and help improve the efficiency of the motor.

In a possible embodiment, the number of teeth of the stator 100 is Z, and Z and n satisfy 20<n/Z≦34.

In this embodiment, the maximum rotational speed of the motor will affect the torque of the motor. However, simply limiting the maximum rotational speed of the motor without limiting the number of teeth of the stator 100 will easily lead to changes in the harmonic magnetic field of the motor and affect the efficiency of the motor. Therefore, combining the number of teeth of the stator 100 and the maximum rotational speed of the rotor 200 can reduce the torque and increase the operating speed of the motor with the same displacement, which is beneficial to improve the efficiency of the motor.

In a possible embodiment, the maximum rotational speed n of the rotor 200 satisfies 120<n≦200.

In this embodiment, limiting the maximum rotational speed of the rotor 200 within this range can ensure the running stability of the motor.

As shown in FIG. 2 , FIG. 3 and FIG. 4 , in a possible embodiment, the stator 100 further includes: an avoidance notch 122 , the avoidance notch 122 is arranged on the surface of the tooth portion 111 facing the rotor 200 , and the avoidance notch 122 and The distance between the first tooth shoe 1111 of the tooth part 111 is smaller than the distance between the avoidance gap 122 and the second tooth shoe 1112 of the tooth part 111; wherein, along the rotation direction of the rotor 200, the rotor 200 passes through the first tooth shoe 1111 and the second tooth shoe 1111 in sequence. Boots 1112.

In this design, the stator 100 further includes avoidance notches 122 disposed on the tooth portion 111 for facing the surface of the rotor 200 . The tooth portion 111 includes a first tooth shoe 1111 and a second tooth shoe 1112 , and along the rotation direction of the rotor 200 , the rotor 200 passes through the first tooth shoe 1111 and the second tooth shoe 1112 in sequence. The distance between the escape notch 122 and the first tooth shoe 1111 is smaller than the distance between the avoidance notch 122 and the second tooth shoe 1112 , that is, the avoidance notch 122 is close to the side of the first tooth shoe 1111 .

By setting avoidance notches 122 on the surface of the teeth 111 facing the rotor 200 , during the assembly process of the stator 100 and the rotor 200 , the avoidance notches 122 avoid protruding parts on the rotor to avoid assembly interference.

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. 1 and FIG. 2 , in a possible embodiment, the outer diameter of the stator punching piece 120 is R1, the inner diameter of the stator punching piece 120 is R2, and the relationship between R1 and R2 satisfies: 0.57≥R2/R1≥ 0.5.

In this embodiment, the relationship between the outer diameter and the inner diameter of the stator punching plate 120 is further defined. It can be understood that the ratio between the inner diameter of the stator punching piece 120 and the outer diameter of the stator punching piece 120 will have a certain impact on the performance of the motor, specifically, it will have an impact on the heat dissipation, magnetic flux density and overall weight of the motor. Various parameters of the motor are balanced to make the motor have a higher cost performance, and the ratio between the inner diameter of the stator punch 120 and the outer diameter of the stator punch 120 is limited within a certain range.

Specifically, the outer diameter of the stator blank 120 is R1, the inner diameter of the stator blank 120 is R2, and the relationship between R1 and R2 satisfies: 0.57≥R2/R1≥0.5.

The outer diameter of the stator punch 120 may be 101.15mm, and the inner diameter of the stator punch 120 may be 53.3mm.

By limiting the ratio range between the inner diameter of the stator punching piece 120 and the outer diameter of the stator punching piece 120, the ratio between the inner diameter of the stator punching piece 120 and the outer diameter of the stator punching piece 120 is greater than or equal to 0.5 and less than or equal to 0.57 , so that the various parameters of the motor can reach the ideal range, so that the motor has a high cost performance.

As shown in FIG. 2 , FIG. 3 and FIG. 4 , 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 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.

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.

As shown in FIG. 3 , in a possible embodiment, 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 groove 211 and a second magnetic steel groove 212 are arranged on the rotor punching plate 210 , and magnetic steel can be respectively loaded into the first magnetic steel groove 211 and the second magnetic steel groove 212 to form a pair of magnetic poles.

In a possible embodiment, the rated torque of the motor is T1, the inner diameter of the stator punching plate 120 is R2, and the torque per unit volume of the rotor 200 is T2, where T1, R2 and T2 satisfy:

In this embodiment, the range of the combined variable among the rated torque of the motor, the inner diameter of the stator punching plate 120 and the torque per unit volume of the rotor 200 is limited. It can be understood that the combined variable among the rated torque of the motor, the inner diameter of the stator punching plate 120 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, it can be Make the output torque of the motor meet the needs of the equipment set by the motor.

Specifically, the rated torque of the motor is T1, the inner diameter of the stator punch 120 is R2, and the torque per unit volume of the rotor 200 is T2, where T1, R2 and T2 satisfy:

5.18×10 ^-7 ≤T1×R2 ^-3 ×T2 ^-1 ≤1.17×10 ^-6 ,

5kN•m•m ^-3 ≤T2≤45kN•m•m ^-3 .

By defining the combined variable between the rated torque of the motor, the inner diameter of the stator punching plate 120 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 define the rotor 200 The torque per unit volume 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. 4 , in the embodiment of the present application, a compressor 300 is proposed. The compressor 300 includes: the motor and the compression component 310 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 application includes the motor proposed in the above embodiments, the compressor 300 has all the beneficial effects of the motor provided in the above 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.

The electrical equipment proposed in this application includes a main body of the equipment and a compressor, wherein the compressor is connected to the main body of the equipment. When the electrical equipment is running, the compressor and the main body of the equipment work together to make the electrical equipment operate normally.

Since the electrical equipment proposed in the present application includes the compressor proposed in the above-mentioned embodiments, the electrical equipment has all the beneficial effects of the compressor provided in the above-mentioned embodiments.

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 motor, including:

a stator assembly comprising a stator and windings wound around the stator;

a rotor disposed within said stator;

The stator includes:

A plurality of stacked stator punches, the stator punches include a plurality of block punches that can be spliced and connected;

Any block punching in a plurality of said block punches includes:

teeth;

The yoke part is arranged on the side of the tooth part away from the axial center of the stator punch, and the side of the yoke part away from the tooth part is provided with a groove body;

The number of pole pairs of the rotor is p, the maximum rotational speed of the rotor is n, and the unit of n is revolution/second, and p and n satisfy, 60<n/p≤100.
The motor according to claim 1, wherein any one of the plurality of segmented punches further comprises:

The first connecting part is arranged on an edge of the block punching piece extending radially along the stator punching piece;

The second connecting part is arranged on the other edge of the stator punching sheet radially extending, and the first connecting part of one block punching sheet can be connected to the second connecting block of the adjacent block punching sheet. The connecting parts can be spliced and connected; 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.
The electric machine according to claim 1, wherein,

The number of teeth of the stator is Z, and Z and n satisfy 20<n/Z≤34.
The electric machine according to claim 1, wherein,

The maximum rotational speed n of the rotor satisfies 120<n≤200.
The motor according to claim 1, wherein the stator further comprises:

An avoidance notch is provided on the surface of the tooth part facing the rotor, and the distance between the avoidance notch and the first tooth shoe of the tooth part is smaller than the distance between the avoidance notch and the second tooth shoe of the tooth part;

Wherein, along the rotation direction of the rotor, the rotor passes through the first tooth shoe and the second tooth shoe sequentially.
The motor according to any one of claims 1 to 5, wherein the stator further comprises:

Aluminum coils are wound around the teeth.
An electric machine according to any one of claims 1 to 5, wherein,

The outer diameter of the stator punch is R1, the inner diameter of the stator punch is R2, and the relationship between R1 and R2 satisfies: 0.57≥R2/R1≥0.5.
The motor according to any one of claims 1 to 5, 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 1 to 5, wherein,

The rated torque of the motor is T1, the inner diameter of the stator punch is R2, and the torque per unit volume of the rotor is T2, where T1, R2 and T2 satisfy:

5.18×10 -7 ≤T1×R2 -3 ×T2 -1 ≤1.17×10 -6 ,

5kN•m•m -3 ≤T2≤45kN•m•m -3 .
An electric machine according to any one of claims 1 to 5, wherein,

The yoke is cut along the radial direction of the stator punch, and the groove passes through the centerline of the section of the yoke.
An electric machine according to any one of claims 1 to 5, wherein,

The groove body includes a trapezoidal groove.
The electric machine according to claim 11, wherein,

Among the plurality of grooves, other grooves except the trapezoidal groove are rectangular.
A compressor, including:

An electric machine as claimed in any one of claims 1 to 12; 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 13, said compressor being connected to said apparatus body.