CN220628970U

CN220628970U - Stator punching sheet and motor

Info

Publication number: CN220628970U
Application number: CN202322309207.4U
Authority: CN
Inventors: 陈家兴; 王周叶; 白冰; 杨静帆; 王志强; 黄积光
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-03-19
Anticipated expiration: 2033-08-25

Abstract

The utility model discloses a stator punching sheet and a motor, wherein the stator punching sheet comprises an annular punching sheet main body, a plurality of equally-spaced winding grooves are formed on the inner annular surface of the annular punching sheet main body along the circumferential direction of the annular punching sheet main body, and a winding tooth pointing to the center of the annular punching sheet main body is defined between two adjacent winding grooves; the winding teeth comprise two opposite side edges, the side edges comprise first straight edges, the length of each first straight edge is tooth length, the distance between the two first straight edges of the winding teeth is tooth width, and the ratio of the tooth length to the tooth width is 3.7-3.9. According to the scheme, the ratio of the tooth length to the tooth width of the stator punching sheet is designed within the range of 3.7-3.9, and the ratio of the tooth length to the tooth width is reasonably optimized, so that the air gap magnetic density of the stator is increased, the material performance of the stator punching sheet is fully exerted, the motor can stably output high torque in a low-speed state, and the application prospect is wider.

Description

Stator punching sheet and motor

Technical Field

The utility model relates to the field of motor structures, in particular to a stator punching sheet and a motor.

Background

In the market of wire drawing machines, a high-speed motor is adopted to be matched with a speed reducer for use in general wire drawing machines, because a motor system is relatively complex, the requirements on the speed and the torque of the motor are relatively high, a direct-drive mode is adopted, the direct-drive motor must meet the design requirements on low speed and high torque, and meanwhile, the torque pulsation of the motor needs to be reduced, so that the influence on the quality of products caused by excessive shaking in the wire drawing process is prevented. The design of a magnetic steel groove on a rotor punching sheet in the existing permanent magnet synchronous motor is not ideal enough, and an air groove at the upper end of the magnetic steel groove is basically similar to a right trapezoid, so that torque pulsation can be reduced, magnetic leakage is reduced, but the air gap magnetic density only stays in a conventional selection range of 0.8-0.85T, the performance of a magnetic conduction silicon steel sheet is difficult to be effectively exerted, the requirements of low speed and high torque of the motor are difficult to be met, and the overall reliability is insufficient.

Disclosure of Invention

The embodiment of the utility model provides a stator punching sheet and a motor, which solve the problem that the size design of the stator punching sheet in the prior art cannot meet the low-speed high-torque requirement of the motor.

The utility model provides a stator punching sheet, which comprises an annular punching sheet main body, wherein a plurality of equally-spaced winding grooves are formed on the inner annular surface of the annular punching sheet main body along the circumferential direction of the annular punching sheet main body, and a winding tooth pointing to the center of the annular punching sheet main body is defined between two adjacent winding grooves; the winding teeth comprise two opposite side edges, the side edges comprise first straight edges, the length of each first straight edge is tooth length, the distance between the two first straight edges of each winding tooth is tooth width, and the ratio of the tooth length to the tooth width is 3.7-3.9.

In the stator punching provided by the embodiment of the utility model, the inner diameter of the annular punching main body ranges from 140 mm to 150mm.

In the stator punching sheet provided by the embodiment of the utility model, the ratio of the inner diameter of the annular punching sheet main body to the outer diameter of the annular punching sheet main body is in the range of 0.7-0.8.

In the stator punching provided by the utility model, two adjacent side edges, which are close to each other, of the winding teeth further comprise two first bevel edges respectively, one end of each of the two first bevel edges is connected with one end of each of the two first straight edges, which faces towards the center of the annular punching main body, and the two first bevel edges incline in opposite directions; the distance between two first bevel edges and one end, close to the center of the annular punching sheet main body, is a first notch width, and the range of the first notch width is 2.5-3.0mm.

In the stator punching provided by the embodiment of the utility model, one end of the first inclined edge, which is close to the center of the annular punching main body, is connected with a second straight edge, and the second straight edge extends towards the center of the annular punching main body; the length of the second straight line side is the notch depth of the winding groove, and the range of the notch depth is 1.0-1.1mm.

In the stator punching provided by the embodiment of the utility model, one end of the first bevel edge, which is far away from the center of the annular punching main body, is an inclined starting end, the distance between the two inclined starting ends of the two first bevel edges, which are adjacent to two winding teeth, is a second notch width, and the range of the second notch width is 5.45-5.55mm.

In the stator punching provided by the embodiment of the utility model, the inclination angle range of the first inclined edge and the first straight line edge is 35-55 degrees.

In the stator punching provided by the embodiment of the utility model, an arc-shaped edge is arranged between two adjacent winding teeth, and one ends of two first straight edges of two adjacent side edges, which are close to the winding teeth, are respectively connected with two ends of the arc-shaped edge.

In the stator punching provided by the embodiment of the utility model, the ratio of the tooth length to the tooth width is 3.87.

The embodiment of the utility model also provides a motor which comprises any one of the stator punching sheets.

The embodiment of the utility model provides a stator punching sheet and a motor, wherein the stator punching sheet comprises an annular punching sheet main body, a plurality of equally-spaced winding grooves are formed on the inner annular surface of the annular punching sheet main body along the circumferential direction of the annular punching sheet main body, and a winding tooth pointing to the center of the annular punching sheet main body is defined between two adjacent winding grooves; the winding teeth comprise two opposite side edges, the side edges comprise first straight edges, the length of each first straight edge is tooth length, the distance between the two first straight edges of each winding tooth is tooth width, and the ratio of the tooth length to the tooth width is 3.7-3.9. According to the scheme, the ratio of the tooth length to the tooth width of the stator punching sheet is designed within the range of 3.7-3.9, the ratio of the tooth length to the tooth width is reasonably optimized, the air gap magnetic density of the stator is increased, the materiality of the stator punching sheet is fully exerted, the motor can stably output high torque in a low-speed state, and the application prospect is wider.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a stator punching sheet according to an embodiment of the present utility model;

fig. 2 is an enlarged view of a portion a of fig. 1;

fig. 3 is an enlarged view of a portion B of fig. 2;

FIG. 4 is a dimensional view of a stator lamination provided in an embodiment of the present utility model;

fig. 5 is a front view of a motor according to an embodiment of the present utility model;

FIG. 6 is a rear view of a motor provided in an embodiment of the present utility model;

fig. 7 is a top view of a motor according to an embodiment of the present utility model;

FIG. 8 is a side view of a motor provided in an embodiment of the present utility model;

the reference numerals in the drawings are as follows:

10. an annular punching body; 20. winding slots; 30. winding teeth; 1. a first straight edge; 2. a first oblique side; 3. a second straight edge; 4. an arc edge; 40. and a motor.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms of directions used in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., refer only to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the utility model and is not limiting of the utility model. In addition, in the drawings, structures similar or identical to those of the drawings are denoted by the same reference numerals.

Referring to fig. 1 to 4, and particularly to fig. 3 to 4, an embodiment of a stator lamination provided by the present utility model is shown, and the structure and the working principle of the stator lamination are described in detail below with reference to the accompanying drawings. The stator punching sheet comprises an annular punching sheet main body 10, wherein a plurality of equally-spaced winding grooves 20 are formed on the inner annular surface of the annular punching sheet main body 10 along the circumferential direction of the annular punching sheet main body, and a winding tooth 30 pointing to the center of the annular punching sheet main body 10 is defined between two adjacent winding grooves 20; the winding teeth 30 comprise two opposite sides, the sides comprise first straight sides 1, the length of each first straight side 1 is tooth length, the distance between the two first straight sides 1 of each winding tooth 30 is tooth width, and the ratio of the tooth length to the tooth width is 3.7-3.9.

In this embodiment, the stator lamination is used as a basic component structure of a stator winding of a motor, the stator core of the motor is formed by stacking a certain number of stator laminations, the stator lamination is made of silicon steel sheets, the stator lamination has higher resistance and lower magnetic permeability, eddy current loss and iron loss can be reduced, efficiency of the motor is improved, the stator lamination is integrally in a standard circular ring shape, namely an annular lamination main body 10, the inner diameter and the outer diameter of the annular lamination main body 10 are specifically determined according to the size design requirement of the whole motor, a plurality of winding slots 20 distributed at equal intervals are formed in the circumferential direction of the inner ring surface of the annular lamination main body 10, the shape size of each winding slot 20 is identical, a winding tooth 30 is formed between every two winding slots 20, the plurality of winding teeth 30 formed between the winding slots 20 are distributed at equal intervals in the circumferential direction of the inner ring surface of the annular lamination main body 10, the shape of each winding tooth 30 is identical, all the winding teeth 30 face the center of the annular lamination main body 10, the inner diameter and the outer diameter of the annular lamination main body 10 are specifically determined according to the size of the motor, the number of winding slots 20 and the number of winding teeth 30 are equal to the number of winding slots of the winding teeth of the stator winding slots and the winding slots 20 are formed by winding the number of the stator winding teeth 30.

In the present embodiment, the sides of the winding teeth 30 in the circumferential direction of the annular sheet body 10 are opposite sides, the sides of the winding teeth 30 include a yoke, an end portion, and a portion between the yoke and the end portion, and the first straight side 1 is a long straight side of the portion of the winding teeth 30 connecting the yoke and the end portion, the yoke of the winding teeth 30 mainly serves as a bridge for conducting magnetic flux, and the end portion of the winding teeth 30 mainly serves as a winding coil for restricting the winding coil from falling, the winding coil is mainly wound around the portion between the yoke and the end portion of the winding teeth 30, the winding teeth 30 have a certain length and width in the radial direction of the annular sheet body 10, the tooth length Hs1 is mainly the distance between the yoke of the winding teeth 30 and the end portion, i.e. the length of the first straight edge 1, the copper wire is mainly wound around the first straight edge 1 of the winding tooth 30, and extends and winds to the yoke portion and the end portion of the winding tooth 30 to form a winding coil, the tooth width TW is the distance between the two first straight edges 1 on two sides of one winding tooth 30, the ratio of the tooth length Hs1 to the tooth width TW is d, i.e. d=tw/Hs 1, the ratio d of the tooth length Hs1 to the tooth width TW is in the range of 3.7-3.9, the ratio d of the tooth length Hs1 to the tooth width TW is designed in the range, the size of the winding tooth 30 is optimized, the magnetic density of the winding tooth 30 can reach a higher standard, and the material property of the silicon steel sheet can be optimized.

Preferably, the ratio d of the tooth length Hs1 to the tooth width TW is designed to be 3.87, the number of slots of the winding slots 20 is set to be 72 slots, the tooth length Hs1 of the winding teeth 30 is set to be 28.64mm, the tooth width TW of the winding teeth 30 is set to be 7.39mm, of course, the tooth length Hs1 and the tooth length TW of the winding teeth 30 can be designed to be other values, as long as the ratio d of the tooth length Hs1 to the tooth width TW is 3.87, the winding teeth 30 are designed according to the preferred parameter value, the magnetic density of the designed stator can reach about 90% of the performance of the silicon steel sheet material, the magnetic density of the stator yoke can reach about 85% of the performance of the silicon steel sheet material, the motor can stably output a large torque, the torque fluctuation range becomes gentle, the motor vibration amplitude is also reduced, the noise is lower during the operation of the motor, and the volume of the motor can be designed to be smaller in practice due to the optimization of the aspect ratio value of the winding teeth 30, and the application is more flexible.

By implementing the embodiment, the ratio of the tooth length to the tooth width of the winding teeth is designed within the range of 3.7-3.9, so that the integral proportion of the winding teeth is reasonably optimized, the magnetic leakage of the stator is reduced to a certain extent, the air gap magnetic density of the stator is increased, the material performance of the stator punching sheet is fully exerted, the motor can stably output large torque in a low-speed state, the use of various actual scenes is met, and the application prospect is wider.

In one embodiment, the inner diameter of the annular die body 10 is in the range of 140-150mm. Specifically, the annular punching body 10 is in an annular shape, the inner diameter of the annular punching body is the diameter of the inner ring, the inner diameter can be designed to be in the range of 140-150mm, a corresponding number of winding grooves 20 can be arranged in the range, and the tooth width TW of the winding teeth 30 is determined due to the fact that the design range of the ratio d of the tooth length Hs1 of the winding teeth 30 to the tooth width TW is 3.7-3.9, and the inner diameter of the annular punching body 10 is designed to be a corresponding value in the range of 140-150mm according to the number of grooves of the winding grooves 20.

Preferably, the design value of the inner diameter of the annular punching body 10 is 145.5mm, after the determination of the value of the inner diameter of the annular punching body 10, the ratio d of the tooth length Hs1 of the winding teeth 30 to the tooth width TW and the number of the grooves of the winding grooves 20 can be adjusted according to the value of the inner diameter of the annular punching body 10, and the design size of the winding grooves 20 and the winding teeth 30 can be optimized on the premise of meeting the small size of the motor by the design value of the inner diameter of the annular punching body 10 of 145.5 mm.

Further, the ratio of the inner diameter of the annular die body 10 to the outer diameter of the annular die body 10 is in the range of 0.7-0.8. Specifically, the outer diameter of the whole annular punching body 10 is the diameter of the outer ring, the ratio of the inner diameter to the outer diameter is set in the range of 0.7-0.8, the size of the whole motor can be optimized, namely the actual value of the outer diameter is equal to the actual value of the inner diameter multiplied by the ratio of the inner diameter to the outer diameter, the inner diameter of the annular punching body 10 is designed in the range of 140-150mm, the outer diameter size of the annular punching body 10 can be designed according to the ratio range of 0.7-0.8, and the size requirement of the motor can be met according to the ratio range.

Preferably, the outer diameter of the annular punching body 10 is 400mm, and after the inner diameter of the annular punching body 10 is determined, the outer diameter is designed according to the installation size requirement of the motor, the outer diameter of the annular punching body 10 is 400mm, and the requirement of motor torque output can be met while the installation size requirement of the motor is met.

In an embodiment, referring to fig. 3 and 4, two adjacent side edges of the winding teeth 30 further include two first oblique sides 2, one ends of the two first oblique sides 2 are respectively connected to one ends of the two first straight sides 1 facing the center of the annular punching body 10, and the two first oblique sides 2 are inclined toward each other; wherein, the distance between two ends of the first bevel edge 2 near the center of the annular punching body 10 is a first notch width Bs0, and the range of the first notch width Bs0 is 2.5-3.0mm. Specifically, the first inclined edge 2 is one inclined edge of the end portion of the winding tooth 30 connected to the end of the first straight edge 1, and since the end portion of the winding tooth 30 is inclined at a certain inclination angle with respect to both sides of the portion for winding the copper wire, the first inclined edge 2 is inclined toward each other with respect to the first straight edge 1, and the distance between the two adjacent first inclined edges 2 at the end near the center of the annular sheet main body 10 is taken as a first slot width Bs0, that is, the distance at the inclined transition junction of the two first inclined edges 2 and the corresponding two first straight edges 1 is the first slot width Bs0, the first slot corresponds to the outer slot of the winding slot 20, the range of the first slot width Bs0 is 2.5-3.0mm, the first slot width Bs0 is designed within this range, and it is possible to ensure that the magnetic density of the stator can reach a higher standard, and the material property of the silicon steel sheet can be optimized.

In this embodiment, the inclination angle range between the first bevel edge 2 and the first straight line edge 1 may be designed within the range of 35-55 °, where the first bevel edge 2 is inclined with respect to the first straight line edge 1, and when the winding coil winds the winding teeth 30, the contact efficiency between the copper wire and the first bevel edge 2 is reasonably optimized by the design of the angle range, so that the magnetic density of the winding teeth 30 may be increased, and the stator punching sheet fully exerts its material performance, and meets the requirement of high torque.

Further, referring to fig. 3 and 4, one end of the first oblique side 2 near the center of the annular punching body 10 is connected with a second straight side 3, and the second straight side 3 extends toward the center of the annular punching body 10; wherein the length of the second straight edge 3 is the notch depth of the winding slot 20, and the notch depth ranges from 1.0 mm to 1.1mm. Specifically, the second straight sides 3 are sides of the end portions of the winding teeth 30, two sides of the end portions of the winding teeth 30 are respectively provided with one second straight side 3, the second straight sides 3 and one end, close to the center of the annular punching body 10, of the first inclined side 2 are in inclined transition connection, between two adjacent winding teeth 30, the two adjacent second straight sides 3 respectively correspond to two side groove walls of the groove opening of the winding groove 20, the length of the second straight sides 3 is the groove opening depth Hs0, the first groove opening serves as an outer groove opening of the winding groove 20, the groove opening depth Hs0 is designed to be in a range of 1.0-1.1mm, the magnetic density of a part in the first groove opening is reasonably optimized, the magnetic density of a stator can be effectively improved, and the material performance of a silicon steel sheet is optimized.

Still further, referring to fig. 3 and 4, an end of the first inclined edge 2 away from the center of the annular punching body 10 is an inclined start, and a distance between two inclined starts of two adjacent two of the first inclined edges 2, which are adjacent to each other by two of the winding teeth 30, is a second slot width Bs1, and the second slot width Bs1 ranges from 5.45 mm to 5.55mm. Specifically, one end of the first oblique side 2 away from the center of the annular punching body 10 is used as an oblique starting end, the first oblique side 2 is connected with the first straight line edge 1 in an oblique transition manner through the oblique starting end, between two adjacent winding teeth 30, the two adjacent first oblique sides 2 are respectively connected with the two adjacent first straight line edges 1 in an oblique transition manner, the distance between the two oblique starting ends of the two first oblique sides 2 is the second notch width Bs1, namely, the distance between the connecting positions of the two adjacent first oblique sides 2 and the two adjacent first straight line edges 1 is the second notch width Bs1, the second notch width Bs1 is the width of an inner notch of the winding slot 20, the width of the second notch width Bs1 influences the magnetic density of the stator, the design of the second notch width Bs1 is in the range of 5.45-5.55mm, the magnetic density of the inner notch part of the winding slot 20 can be reasonably optimized, the magnetic density of the stator can be effectively improved, the material performance of the silicon steel sheet can be optimized, and high torque can be stably output.

In an embodiment, referring to fig. 3 and 4, an arc-shaped edge 4 is disposed between two adjacent winding teeth 30, and one ends of two first straight edges 1 of two adjacent side edges of two adjacent winding teeth 30 are respectively connected to two ends of the arc-shaped edge 4. Specifically, the arc edge 4 is a side edge of the bottom of the winding slot 20, that is, a side edge of a yoke portion of the winding teeth 30, and is in a circular arc shape, one ends of two adjacent first straight edges 1 are respectively connected to two ends of the arc edge 4, the arc edge 4 may also be an irregular arc shape, a diameter of a normal circular arc shape is generally equal to a tooth width TW of the winding teeth 30, and when a ratio range of the tooth length Hs1 of the winding teeth 30 to the tooth width TW is designed to be within a range of 3.7-3.9, magnetic density of the yoke portion of the stator reaches an optimal standard, so that material performance of a stator punching sheet is fully exerted, and a requirement of high torque is met.

The present embodiment also provides a motor 40, referring to fig. 5 to 8, the motor 40 includes a housing, a rotor, a stator formed by stator laminations, and other components, and a certain number of stator laminations together form a stator core, the stator and rotor components are mounted in the housing to form a whole of the motor 40 by winding copper wires around the stator core, and the motor 40 may be a three-phase asynchronous motor, a three-phase synchronous motor, or other types of motors, which is not limited herein.

In the motor 40 in this embodiment, due to the adoption of the stator punching sheet provided by the utility model, the magnetic density of the stator yoke is effectively improved, and the motor 40 can stably output high torque in a state of keeping low speed, and has a very wide application prospect in various scenes. The stator punching sheet in this embodiment may adopt any one of the stator punching sheets provided by the present utility model, and since the specific structure and the working principle of the stator punching sheet have been described in detail in the foregoing description, for brevity of the description, no further description is given here.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. A stator lamination, comprising:

the annular punching sheet comprises an annular punching sheet main body, wherein a plurality of equally-spaced winding grooves are formed on the inner annular surface of the annular punching sheet main body along the circumferential direction of the annular punching sheet main body, and a winding tooth pointing to the center of the annular punching sheet main body is defined between two adjacent winding grooves;

the winding teeth comprise two opposite side edges, the side edges comprise first straight edges, the length of each first straight edge is tooth length, the distance between the two first straight edges of each winding tooth is tooth width, and the ratio of the tooth length to the tooth width is 3.7-3.9.

2. The stator core of claim 1 wherein the inner diameter of the annular core body ranges from 140-150mm.

3. The stator core of claim 2 wherein the ratio of the inner diameter of the annular core body to the outer diameter of the annular core body is in the range of 0.7-0.8.

4. The stator punching sheet according to claim 1, characterized in that two side edges of adjacent two winding teeth close to each other further include two first oblique edges, one ends of the two first oblique edges are respectively connected with one ends of two first straight edges toward the center of the annular punching sheet main body, and the two first oblique edges incline toward each other;

the distance between two first bevel edges and one end, close to the center of the annular punching sheet main body, is a first notch width, and the range of the first notch width is 2.5-3.0mm.

5. The stator plate of claim 4, wherein one end of the first beveled edge near the center of the annular plate body is connected to a second straight edge, the second straight edge extending toward the center of the annular plate body;

the length of the second straight line side is the notch depth of the winding groove, and the range of the notch depth is 1.0-1.1mm.

6. The stator punching sheet according to claim 4, characterized in that an end of the first oblique side away from the center of the annular punching sheet body is an inclined start end, a distance between two inclined start ends of two first oblique sides, adjacent to two winding teeth, is a second slot width, and the second slot width ranges from 5.45 mm to 5.55mm.

7. The stator plate of claim 4 wherein the first beveled edge is inclined at an angle in the range of 35 ° to 55 ° to the first straight edge.

8. The stator punching sheet according to claim 1, wherein an arc-shaped edge is provided between two adjacent winding teeth, and one ends of two first straight edges of two adjacent side edges of two adjacent winding teeth are respectively connected to two ends of the arc-shaped edge.

9. The stator plate of claim 1 wherein the ratio of the tooth length to the tooth width is 3.87.

10. An electric machine comprising a stator lamination as defined in any one of claims 1 to 9.