CN112234729A

CN112234729A - Stator and motor with same

Info

Publication number: CN112234729A
Application number: CN202011172706.8A
Authority: CN
Inventors: 陈飞龙; 谢亮; 杨文德; 吴帮超; 刘赫; 李褀
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-01-15

Abstract

The invention provides a stator and a motor with the same. Wherein, the stator includes stator body, boots body and boots foot, and the boots foot passes through the boots body to be connected with stator body, and the boots foot includes two sides, and each side includes: the first plane is connected with the boot body and is a triangular plane; the first side edge of the second plane is connected with the first plane; the second side edge of the second plane is connected with the third plane, and an included angle is formed between the second plane and the third plane; a third side of the fourth plane is connected with the second plane through the third plane, and a fourth side of the fourth plane is positioned in the bottom surface of the boot foot far away from the boot body; wherein the third side and the fourth side are parallel to each other and the distance between the third side and the fourth side is L₁The first side edge and the second side edge are arranged in parallel and the distance between the first side edge and the second side edge is L₂，L₁And L₂Satisfy

The relationship (2) of (c). The invention solves the problem that the servo motor in the prior art has lower precision and can not meet the use requirement of a user.

Description

Stator and motor with same

Technical Field

The invention relates to the technical field of motors, in particular to a stator and a motor with the stator.

Background

At present, with the rapid development of intelligent equipment such as robots, the precision requirement of the market on servo motors is higher and higher. The magnetic slot torque is a key index influencing the precision of the servo motor, and the cogging torque is torque generated by interaction between the permanent magnet and the stator core when the permanent magnet motor winding is not electrified and is caused by fluctuation of a tangential component of the interaction between the permanent magnet and the stator tooth part.

In the prior art, the winding slots of the stator of the servo motor are straight slots or inclined slots and the size relationship between the winding slots and the stator tooth parts is not limited, so that the cogging torque of the servo motor is large, the precision of the servo motor is reduced, and the use requirement of a user cannot be met.

Disclosure of Invention

The invention mainly aims to provide a stator and a motor with the same, and aims to solve the problem that a servo motor in the prior art is low in precision and cannot meet the use requirement of a user.

In order to achieve the above object, according to one aspect of the present invention, there is provided a stator including a stator body, a shaft, and a leg, the leg being connected to the stator body through the shaft, the leg including two sides, each side including: the first plane is connected with the boot body and is a triangular plane; the first side edge of the second plane is connected with the first plane; the second side edge of the second plane is connected with the third plane, and an included angle is formed between the second plane and the third plane; a third side of the fourth plane is connected with the second plane through the third plane, and a fourth side of the fourth plane is positioned in the bottom surface of the boot foot far away from the boot body; wherein the third side and the fourth side are parallel to each other and between themA distance L₁The first side edge and the second side edge are arranged in parallel and the distance between the first side edge and the second side edge is L₂，L₁And L₂Satisfy

The relationship (2) of (c).

Further, the fourth planes of two adjacent boots feet are arranged in parallel and the distance between the fourth planes is L₄To form a winding slot; the second planes of two adjacent boots feet are arranged in parallel and the distance between the second planes is L₃，L₃And L₄Satisfy

The relationship (2) of (c).

Further, the second plane and the fourth plane are arranged parallel to each other.

Further, the junction of the fourth side and the bottom surface of the boot foot away from the boot body has a chamfer or rounded corner.

Further, the junction of the third side and the third plane has a chamfer or rounded corner.

Further, the second plane and the third plane are both quadrilateral planes.

Further, the stator body is the arc section or is the tube-shape, and the fourth plane is the rectangle plane, and the rectangle plane still includes fifth side and sixth side, and the fifth side sets up with the sixth side relatively, and the extending direction of fifth side is unanimous with the radial direction of stator body.

Furthermore, the stator body is an arc-shaped section, the number of the stator bodies is multiple, the plurality of arc-shaped sections surround to form a cylindrical structure, the number of the boot bodies is multiple, the number of the boot feet is multiple, and the plurality of the boot bodies and the plurality of the stator bodies are arranged in a one-to-one correspondence manner; the plurality of bootlegs are arranged in one-to-one correspondence with the plurality of boot bodies.

Furthermore, the stator body is cylindrical, the boot body is arranged on the inner arm of the stator body, and the boot foot is positioned at one end of the boot body, which is far away from the stator body; wherein, the boots body is a plurality of, and a plurality of boots bodies set up along stator body's circumference interval, and the boots foot is a plurality of, and a plurality of boots foot and a plurality of boots body one-to-one set up.

According to another aspect of the present invention, there is provided a motor including a stator and a rotor; wherein the stator is the above stator.

By applying the technical scheme of the invention, each side surface of the boot foot comprises a first plane, a second plane, a third plane and a fourth plane which are connected in sequence. The first side edge and the second side edge of the second plane are arranged in parallel and the distance between the first side edge and the second side edge is L₂The third side and the fourth side of the fourth plane are parallel to each other and the distance between the third side and the fourth side is L₁And L is₁And L₂Satisfy

The cogging torque of the motor is small and the precision is high, and therefore the problem that the use requirement of a user cannot be met due to low precision of the servo motor in the prior art is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a front view of a first embodiment of a stator according to the invention;

FIG. 2 shows an enlarged schematic view at A of the stator of FIG. 1;

FIG. 3 shows the coefficients of FIG. 1

A relation curve chart between the cogging torque of the motor and the cogging torque of the motor;

FIG. 4 shows the coefficients of FIG. 1

fig. 5 shows a schematic perspective view of a second embodiment of a stator according to the invention;

FIG. 6 shows an enlarged schematic view at B of the stator of FIG. 5; and

fig. 7 shows a front view of the stator in fig. 5.

Wherein the figures include the following reference numerals:

10. a stator body; 11. a boss strip; 12. a groove strip; 20. a boot body; 30. a boot foot; 31. a first plane; 32. a second plane; 321. a first side edge; 322. a second side edge; 33. a third plane; 34. a fourth plane; 341. a fifth side; 35. a winding slot.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless stated to the contrary, use of the directional terms "upper and lower" are generally directed to the orientation shown in the drawings, or to the vertical, or gravitational direction; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; "inner and outer" refer to the inner and outer relative to the profile of the respective member itself, but the above directional terms are not intended to limit the present invention.

In order to solve the problem that the precision of a servo motor in the prior art is lower and cannot meet the use requirement of a user, the application provides a stator and a motor with the same.

Example one

As shown in fig. 1 and 2, the stator includes a stator body 10, a boot shaft 20, and a boot leg 30, the boot leg 30 is connected to the stator body 10 through the boot shaft 20, and the boot leg 30 includes two side surfaces, each of which includes a first plane 31, a second plane 32, a third plane 33, and a fourth plane 34. The first plane 31 is connected to the boot body 20, and the first plane 31 is a triangular plane. The first side 321 of the second plane 32 is parallel to the first planeThe faces 31 are connected. The second side 322 of the second plane 32 is connected to the third plane 33, and the second plane 32 and the third plane 33 form an included angle. The third side of the fourth plane 34 is connected to the second plane 32 by a third plane 33, and the fourth side of the fourth plane 34 is located in the bottom surface of the foot 30 away from the shaft 20. Wherein the third side and the fourth side are parallel to each other and the distance between the third side and the fourth side is L₁The first side 321 and the second side 322 are parallel to each other and have a distance L therebetween₂，L₁And L₂Satisfy

The relationship (2) of (c).

In this embodiment, the above arrangement of the stator can effectively reduce the magnetic field energy fluctuation when the permanent magnet magnetic field passes through the winding slot 35, thereby reducing the cogging torque and improving the motor precision.

In the present embodiment, it is preferred that,

therefore, the arrangement enables the cogging torque of the motor to be minimum and the accuracy to be maximum, so that the motor can meet the use requirements of users.

In addition, L is₁And L₂The relationship between them is not limited to this, and may be adjusted according to the operating conditions. Alternatively,

or

Or

Or

Alternatively, the fourth planes 34 of two adjacent bootlegs 30 are parallel to each other and have a distance L therebetween₄To form the winding slot 35. The second planes 32 of two adjacent bootlegs 30 are parallel to each other and have a distance L between them₃，L₃And L₄Satisfy

The relationship (2) of (c). Like this, above-mentioned setting makes the tooth's socket torque of motor less, the precision is great, and then has solved among the prior art servo motor's the lower problem that can not satisfy user's user demand of precision.

In the present embodiment, it is preferred that,

In addition, L is₃And L₄The relationship between them is not limited to this, and may be adjusted according to the operating conditions. Alternatively,

or

Or

In the present embodiment, the first plane 31 is an acute triangle, and the acute triangle includes a first acute angle, and the first acute angle is greater than or equal to 2 ° and less than or equal to 4 °. The first acute angles of the first planes 31 of the both side surfaces of the leg 30 are different in position, and the two first acute angles are respectively disposed close to both end surfaces of the stator in the thickness direction of the stator.

In the present embodiment, the second plane 32 and the fourth plane 34 are disposed parallel to each other. Thus, the above arrangement makes the second plane 32 and the fourth plane 34 simpler in structure, easy to process and implement, and reduces the processing cost of the boot foot 30.

Optionally, the junction of the fourth side with the bottom surface of the foot 30 away from the shaft 20 has a chamfer or radius. Like this, above-mentioned setting can be avoided having sharp edge on the stator and cut or fish tail around establishing the coil in winding groove 35, has prolonged the life of motor, has also promoted the use reliability of motor.

Optionally, the junction of the third side edge and the third plane 33 has a chamfer or rounded corner. Like this, above-mentioned setting can be avoided having sharp edge on the stator and cut or fish tail around establishing the coil in winding groove 35, has prolonged the life of motor, has also promoted the use reliability of motor.

In the present embodiment, the second plane 32 and the third plane 33 are both quadrangular planes. Specifically, the second plane 32 and the third plane 33 are both rectangular planes, so that the second plane 32 and the third plane 33 are simpler in structure, easy to process and implement, and the processing cost of the stator is reduced.

Optionally, the stator body 10 is an arc-shaped segment or a cylinder, the fourth plane 34 is a rectangular plane, the rectangular plane further includes a fifth side 341 and a sixth side, the fifth side 341 and the sixth side are disposed opposite to each other, and an extending direction of the fifth side 341 is consistent with a radial direction of the stator body 10. Like this, above-mentioned setting makes the notch of wire winding groove 35 be the rectangle, and then has reduced the width of notch, has further reduced the tooth's socket torque, has promoted the precision of motor.

In this embodiment, the stator body 10 is cylindrical, the boot shaft 20 is disposed on the inner arm of the stator body 10, and the boot foot 30 is located at one end of the boot shaft 20 away from the stator body 10. The plurality of the boot bodies 20 are arranged at intervals along the circumferential direction of the stator body 10, the plurality of the boot legs 30 are arranged, and the plurality of the boot legs 30 are arranged in one-to-one correspondence with the plurality of the boot bodies 20. Like this, above-mentioned setting makes the processing of stator more nimble, has reduced staff's the processing degree of difficulty, and then has reduced the processing cost of motor.

The present application further provides an electric machine (not shown) comprising a stator and a rotor. Wherein the stator is the above stator.

Specifically, the cogging torque and the coefficient of the motor

The relationship between the cogging torque and the coefficient is shown in FIG. 3

Shows a tendency of decreasing first and then increasing, coefficient

The minimum cogging torque is obtained between 0.2 and 0.4. Cogging torque and coefficient of motor

The relationship between the coefficients is shown in FIG. 4

The cogging torque reaches the minimum value between 24 and 25.

Example two

The stator in the second embodiment is different from the first embodiment in that: the stator body 10 is different in structure.

As shown in fig. 5 to 7, the stator body 10 is an arc-shaped segment, the stator body 10 is multiple, the multiple arc-shaped segments surround to form a cylindrical structure, the boot shaft 20 is multiple, the boot foot 30 is multiple, and the multiple boot shafts 20 and the multiple stator bodies 10 are arranged in a one-to-one correspondence manner. The plurality of bootlegs 30 are provided in one-to-one correspondence with the plurality of booties 20. Wherein each of the shaft shoes 20 is positioned at one side of the center of the stator body 10. Like this, the stator forms through a plurality of stator bodies 10 concatenation to make the dismouting of stator easier, simple and convenient, reduced the dismouting degree of difficulty.

In this embodiment, the central axis of each stator body 10 is coaxially arranged, so that the splicing of the plurality of stator bodies 10 is easier and simpler, and the splicing difficulty is reduced.

As shown in fig. 5 and 7, two side surfaces of each stator body 10 are respectively provided with a boss bar 11 and a groove bar 12 for positioning between two adjacent stator bodies 10, so that the splicing of the plurality of stator bodies 10 is more accurate, and the splicing difficulty of workers is reduced.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

each side of the boot foot comprises a first plane, a second plane, a third plane and a fourth plane which are connected in sequence. The first side edge and the second side edge of the second plane are arranged in parallel and the distance between the first side edge and the second side edge is L₂The third side and the fourth side of the fourth plane are parallel to each other and the distance between the third side and the fourth side is L₁And L is₁And L₂Satisfy

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator comprising a stator body (10), a shaft (20) and a foot (30), the foot (30) being connected to the stator body (10) through the shaft (20), the foot (30) comprising two sides, characterized in that each of said sides comprises:

a first plane (31) connected to the boot body (20), the first plane (31) being a triangular plane;

a second plane (32), a first side (321) of the second plane (32) being connected to the first plane (31);

a third plane (33), wherein a second side edge (322) of the second plane (32) is connected with the third plane (33), and an included angle is formed between the second plane (32) and the third plane (33);

a fourth plane (34), the third side of the fourth plane (34) being connected to the second plane (32) by the third plane (33), the fourth side of the fourth plane (34) being located in the underside of the foot (30) facing away from the shaft (20);

wherein the third side and the fourth side are parallel to each other and between themIs a distance L₁The first side edge (321) and the second side edge (322) are arranged in parallel and the distance between the first side edge and the second side edge is L₂，L₁And L₂Satisfy

The relationship (2) of (c).

2. Stator according to claim 1, characterized in that the fourth planes (34) of two adjacent shoes (30) are arranged parallel to each other and at a distance L therebetween₄To form a winding slot (35); the second planes (32) of two adjacent boots feet (30) are arranged in parallel with each other and the distance between the two planes is L₃，L₃And L₄Satisfy

The relationship (2) of (c).

3. The stator according to claim 1, characterized in that said second plane (32) and said fourth plane (34) are arranged parallel to each other.

4. A stator according to claim 1, characterized in that the junction of the fourth side with the bottom surface of the leg (30) remote from the shaft (20) has a chamfer or fillet.

5. A stator according to claim 1, characterized in that the junction of the third side with the third plane (33) has a chamfer or a fillet.

6. The stator according to claim 1, characterized in that said second plane (32) and said third plane (33) are both quadrangular planes.

7. The stator according to claim 1, characterized in that the stator body (10) is an arc-shaped segment or a cylinder, the fourth plane (34) is a rectangular plane, the rectangular plane further comprises a fifth side (341) and a sixth side, the fifth side (341) is disposed opposite to the sixth side, and the fifth side (341) extends in the same direction as the radial direction of the stator body (10).

8. The stator according to claim 1, wherein the stator body (10) is an arc-shaped segment, the stator body (10) is provided in plurality, the arc-shaped segments surround to form a cylindrical structure, the boot body (20) is provided in plurality, the boot foot (30) is provided in plurality, and the plurality of boot bodies (20) and the plurality of stator bodies (10) are arranged in a one-to-one correspondence manner; the plurality of footrests (30) are provided in one-to-one correspondence with the plurality of shaft parts (20).

9. The stator according to claim 1, characterized in that the stator body (10) is cylindrical, the shaft (20) is arranged on the inner arm of the stator body (10), and the foot (30) is located at one end of the shaft (20) far away from the stator body (10); the plurality of boot bodies (20) are arranged at intervals along the circumferential direction of the stator body (10), the plurality of boot legs (30) are arranged, and the plurality of boot legs (30) and the plurality of boot bodies (20) are arranged in a one-to-one correspondence manner.

10. An electric machine comprising a stator and a rotor; wherein the stator is the stator of any one of claims 1 to 9.