Magnetic steel structure for motor

Abstract

The utility model relates to a magnetic steel structure used for a motor, comprising a plurality of magnetic steel bodies fixed on a magnetic conductive block, the pole-arc coefficient of the magnetic steel bodies is less than 1, the magnetic steel bodies are provided with gaps, and the plurality of magnetic steel bodies are continuously fixed on the magnetic conductive block; the plurality of magnetic steel bodies comprise a plurality of first magnetic steels and a plurality of second magnetic steels, the first magnetic steels and the second magnetic steels are adjacently and closely arranged, the gaps in the first magnetic steels are first gaps, and the gaps in the second magnetic steels are second gaps; the total area of all the first notches in the first magnetic steel is equal to the total area of all the second notches in the second magnetic steel. Compared with the prior art, the gap is arranged on the magnetic steel body, so that the magnetic steel body can be continuously and fully attached to the magnetic conductive ring on the premise that the pole-arc coefficient is less than 1, that is, every two magnetic steel bodies are tightly attached, and the adhesive force between every two adjacent magnetic steel bodies is increased; the use amount of the magnetic steel is saved on the basis of maintaining or improving the performance of the motor, and the installation stability of the magnetic steel is ensured.

Description

Technical Field

[0001] The utility model relates to a magnetic steel structure used for a motor, belonging to the technical field of motors. Background Art

[0002] The motor includes a magnet and a magnetic ring. In the prior art, the motor adopts a surface-mounted continuous magnetic steel structure. The magnet is glued to the surface of the magnetic ring with glue and is in a fully attached state. However, magnets are generally made of rare earth materials. Rare earth materials are strategic resources with high costs. As a high-cost part of the motor, how to save the material of the magnet and ensure its firm assembly while ensuring the performance of the motor and achieving the goal of cost reduction. In the prior art, a motor with a magnet interval and a pole arc coefficient less than 1 is usually used to ensure motor performance and reduce costs. The pole arc coefficient is usually defined as the ratio of the circular angle occupied by the magnetic pole to the pole pitch. In the motor, the magnetic pole is usually generated by a permanent magnet, and the pole pitch refers to the distance between the center lines of two adjacent magnetic poles. However, the magnets are arranged at intervals, and the magnets can only be installed by glue between the magnets and the magnetic rings. When the adhesion between the magnets and the magnetic rings becomes loose, the magnets can easily detach from the magnetic rings. This results in the magnets having insufficient bonding strength and being easy to fall off. As a result, the magnets in the prior art cannot have both the advantages of a pole arc coefficient of less than 1 and firm adhesion of the magnets. Utility Model Content

[0003] The utility model aims to provide a magnetic steel structure for a motor with a fully attached and firmly installed magnetic steel and a pole arc coefficient less than 1 in view of the shortcomings of the prior art.

[0004] To achieve the purpose, the technical solution adopted by the utility model is: a magnetic steel structure for a motor, comprising a plurality of magnetic steel bodies fixed on a magnetic conductive block, the pole arc coefficient of the magnetic steel body being less than 1, a notch being formed on the magnetic steel body, and a plurality of the magnetic steel bodies being continuously fixed on the magnetic conductive block.

[0005] As a further optimization of the above technical solution: the multiple magnetic steel bodies include a plurality of first magnetic steels and a plurality of second magnetic steels, the first magnetic steels and the second magnetic steels are arranged adjacent to each other, the gap on the first magnetic steel is a first gap, and the gap on the second magnetic steel is a second gap.

[0006] As a further optimization of the above technical solution: the total area of ​​all the first notches on the first magnetic steel is equal to the total area of ​​all the second notches on the second magnetic steel.

[0007] As a further optimization of the above technical solution: the first gap and the second gap are arranged in the same direction, so that the first gap or the second gap is provided between any two adjacent magnetic steel bodies.

[0008] As a further optimization of the above technical solution: the position of the first notch on the first magnetic steel and the position of the second notch on the second magnetic steel are staggered.

[0009] As a further optimization of the above technical solution: the sum of the axial heights of all the first notches on the first magnetic steel is equal to the sum of the axial heights of all the second notches on the second magnetic steel.

[0010] As a further optimization of the above technical solution: the sum of the axial heights of all the first notches on the first magnetic steel and all the second notches on the second magnetic steel is equal to the axial height H of the first magnetic steel, and the axial height of the second magnetic steel is equal to the axial height H of the first magnetic steel.

[0011] As a further optimization of the above technical solution: the first notch and the second notch complement each other, so that the first magnetic steel and the second magnetic steel can be assembled into a complete square body during molding.

[0012] As a further optimization of the above technical solution: the first notch and the second notch are both in a rectangular shape.

[0013] As a further optimization of the above technical solution: one of the first notches is located at the lower right corner of the first magnetic steel, and one of the second notches is located at the upper right corner of the second magnetic steel.

[0014] As a further optimization of the above technical solution: the shape and size of the first notch are the same as the shape and size of the second notch.

[0015] As a further optimization of the above technical solution: two first notches are provided, and the two first notches are respectively located at the upper and lower ends of the right side of the first magnetic steel, and one second notch is provided and is located in the middle of the right side of the second magnetic steel.

[0016] As a further optimization of the above technical solution: the height of the second notch is twice the height of the first notch, and the two first notches form an insertion block on the right side of the first magnetic steel, and the insertion block can be inserted into the second notch.

[0017] As a further optimization of the above technical solution: the pole arc coefficient of the magnetic steel body is 0.5-0.99.

[0018] As a further optimization of the above technical solution: the magnetic conductive block is a magnetic conductive ring, and the magnetic steel body is continuously and fully attached to the inner circumference of the magnetic conductive ring through an adhesive.

[0019] As a further optimization of the above technical solution: an installation gap is provided between the magnetic steel body and the inner circumference of the magnetic conductive ring, and an adhesive is provided in the installation gap.

[0020] Compared with the prior art, the setting of the notch on the magnetic steel body in the utility model enables the magnetic steel body to be continuously and fully attached to the magnetic ring under the premise that the pole arc coefficient is less than 1, that is, the magnetic steel bodies are tightly attached to each other, thereby increasing the adhesion between two adjacent magnetic steel bodies. When the adhesion between one of the magnetic steel bodies and the magnetic ring is not strong enough, the adjacent magnetic steel body is abutted against it so that it will not fall off the magnetic ring, thereby improving the installation stability of the magnetic steel body and making the installation of the magnetic steel body more secure. At the same time, the setting of the notch makes the pole arc coefficient less than 1, greatly reducing the amount of magnetic steel used and improving the sinusoidal characteristics of the motor, thereby improving the overall performance of the motor and improving the electric The overall operation stability and reliability of the machine are improved, noise and interference are reduced, and the service life of the motor is extended, thereby saving the amount of magnetic steel on the basis of maintaining or improving the performance of the motor, and ensuring the stability of the magnetic steel installation; the distribution of the first notch and the second notch makes the magnetic field distribution more uniform and reasonable, thereby making the magnetic field strength more uniform, and also minimizes the amount of magnetic steel body and reduces the cost; the first magnetic steel and the second magnetic steel can be assembled into a complete square body, which can effectively improve the material utilization rate and reduce the waste of raw materials; at the same time, cutting in the middle of the square body can make the first magnetic steel and the second magnetic steel formed at the same time, which is convenient for the production and manufacturing of the first magnetic steel and the second magnetic steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the first embodiment of the present utility model.

[0022] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0023] Figure 3 It is a three-dimensional structural schematic diagram of the second embodiment of the present utility model.

[0024] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at point B in the middle. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Embodiment 1

[0027] like Figure 1-2As shown, a magnetic steel structure for a motor includes a plurality of magnetic steel bodies 2 continuously fixed on a magnetic conductive block, a notch is formed on the magnetic steel body 2, and a pole arc coefficient of the magnetic steel body 2 is less than 1. The pole arc coefficient of the magnetic steel body 2 is 0.5 to 0.99. The magnetic conductive block is specifically a magnetic conductive ring 1, and an installation gap is provided between the magnetic steel body 2 and the inner circumference of the magnetic conductive ring 1, and an adhesive is provided in the installation gap, and the magnetic steel body 2 is continuously and fully attached to the inner circumference of the magnetic conductive ring 1 through the adhesive. The adhesive is specifically an anaerobic adhesive, which naturally solidifies under anaerobic or anoxic conditions. The installation gap provides sufficient space for the adhesive to diffuse freely, so that the adhesive can be filled to a sufficient bonding area in the installation gap by free flow or extrusion diffusion; the installation gap can also ensure that the amount of adhesive required for curing is sufficient, thereby improving the bonding force between the magnetic steel body 2 and the magnetic conductive ring 1 and ensuring sufficient bonding strength.

[0028] The setting of the notch on the magnetic steel body 2 enables the magnetic steel body 2 to be continuously and fully attached to the magnetic ring 1 under the premise that the pole arc coefficient is less than 1, that is, the magnetic steel bodies 2 are closely attached to each other, which increases the adhesion between the two adjacent magnetic steel bodies 2. When the adhesion between one of the magnetic steel bodies 2 and the magnetic ring 1 is not strong enough, the adjacent magnetic steel body 2 abuts against it so that it will not fall off the magnetic ring 1, thereby improving the installation stability of the magnetic steel body 2 and making the magnetic steel body 2 more firmly installed. At the same time, the setting of the notch makes the pole arc coefficient less than 1, greatly reducing the amount of magnetic steel while improving the sinusoidal characteristics of the motor, improving the overall performance of the motor, improving the overall running stability and reliability of the motor, reducing noise and interference, and extending the service life of the motor, thereby achieving the saving of magnetic steel on the basis of maintaining or improving the performance of the motor, while ensuring the stable installation of the magnetic steel. The magnetic steel body 2 in this embodiment is a straight plate type magnetic steel. The same tile-shaped or other shaped magnetic steel can also be provided with a notch to make the pole arc coefficient less than 1, saving the amount of magnetic steel while ensuring the stable installation of the magnetic steel.

[0029] In the above technical solution: the plurality of magnetic steel bodies 2 include a plurality of first magnetic steels 21 and a plurality of second magnetic steels 22, the first magnetic steels 21 and the second magnetic steels 22 are arranged adjacently and closely, the notch on the first magnetic steel 21 is the first notch 23, and the notch on the second magnetic steel 22 is the second notch 24. The total area of ​​all the first notches 23 on the first magnetic steel 21 is equal to the total area of ​​all the second notches 24 on the second magnetic steel 22. The first notch 23 and the second notch 24 are arranged in the same direction, so that a first notch 23 or a second notch 24 is provided between any two adjacent magnetic steel bodies 2. And the position of the first notch 23 on the first magnetic steel 21 and the position of the second notch 24 on the second magnetic steel 22 are staggered and do not overlap each other. Since the magnetic field at the notch is weak, the above arrangement makes the distribution of the notch in the entire magnetic steel body 2 more dispersed and uniform, which can make the magnetic field distribution more uniform and reasonable, thereby making the magnetic field strength more uniform.

[0030] In the above technical solution: the sum of the axial heights of all the first notches 23 on the first magnetic steel 21 is equal to the sum of the axial heights of all the second notches 24 on the second magnetic steel 22; the sum of the axial heights of all the first notches 23 on the first magnetic steel 21 and all the second notches 24 on the second magnetic steel 22 is equal to the axial height H of the first magnetic steel 21, and the axial height of the second magnetic steel 22 is equal to the axial height H of the first magnetic steel 21. That is, the axial heights of the first notches 23 and the second notches 24 are both 1 / 2 of the axial height of the first magnetic steel 21, and the heights of the two are the same, which ensures a more uniform magnetic field strength, and also minimizes the amount of the magnetic steel body 2, thereby reducing the cost.

[0031] In the above technical solution: the first notch 23 and the second notch 24 complement each other, so that the first magnetic steel 21 and the second magnetic steel 22 can be assembled into a complete square body when they are formed. Since the production method of the magnetic steel is to cut it from the square raw material by wire cutting, the first magnetic steel 21 and the second magnetic steel 22 can be assembled into a complete square body, which can effectively improve the material utilization rate and reduce the waste of raw materials; at the same time, a cut in the middle of the square body can make the first magnetic steel 21 and the second magnetic steel 22 be formed at the same time, which is convenient for the production and manufacturing of the first magnetic steel 21 and the second magnetic steel 22.

[0032] In the above technical solution: the first notch 23 and the second notch 24 are both in the shape of a rectangular parallelepiped.

[0033] like Figure 1 , 2 As shown, a first notch 23 is provided and located at the lower right corner of the first magnetic steel 21, and a second notch 24 is provided and located at the upper right corner of the second magnetic steel 22. The shape and size of the first notch 23 are the same as those of the second notch 24, so that the first magnetic steel 21 and the second magnetic steel 22 can be assembled into a complete square body. The first magnetic steel 21 and the second magnetic steel 22 can be formed at the same time by cutting along a zigzag shape in the middle of the square body, which is convenient for the production of the first magnetic steel 21 and the second magnetic steel 22.

[0034] Embodiment 2

[0035] like Figure 3 , 4As shown, the structure of this embodiment is basically the same as that of the first embodiment, the difference being that two first notches 23 are provided, and the two first notches 23 are respectively located at the upper and lower ends of the right side of the first magnetic steel 21. One second notch 24 is provided and is located in the middle of the right side of the second magnetic steel 22. The height of the second notch 24 is twice the height of the first notch 23, the length of the second notch 24 is the same as the length of the first notch 23, and the width of the second notch 24 is the same as the width of the first notch 23; the two first notches 23 form an insertion block on the right side of the first magnetic steel 21, and the insertion block can be inserted into the second notch 24, so that the first magnetic steel 21 and the second magnetic steel 22 can be assembled into a complete square body, which is convenient for the production and manufacturing of the magnetic steel body 2, improves material utilization, and reduces material waste.

[0036] The preferred specific embodiments of the present utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the present utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should fall within the protection scope of the present utility model.

Claims

1. A magnetic steel structure for a motor, comprising a plurality of magnetic steel bodies (2) fixed on a magnetic conductive block, wherein the pole arc coefficient of the magnetic steel body (2) is less than 1, and characterized in that A notch is formed on the magnetic steel body (2), and a plurality of the magnetic steel bodies (2) are continuously fixed on the magnetic conductive block.

2. A magnetic steel structure for a motor according to claim 1, characterized in that The plurality of magnetic steel bodies (2) include a plurality of first magnetic steels (21) and a plurality of second magnetic steels (22); the first magnetic steels (21) and the second magnetic steels (22) are arranged adjacent to each other and closely to each other; the notch on the first magnetic steel (21) is a first notch (23); and the notch on the second magnetic steel (22) is a second notch (24); The total area of ​​all the first notches (23) on the first magnetic steel (21) is equal to the total area of ​​all the second notches (24) on the second magnetic steel (22).

3. A magnetic steel structure for a motor according to claim 2, characterized in that The first notch (23) and the second notch (24) are arranged in the same direction, so that the first notch (23) or the second notch (24) is provided between any two adjacent magnetic steel bodies (2).

4. A magnetic steel structure for a motor according to claim 2, characterized in that The position of the first notch (23) on the first magnetic steel (21) and the position of the second notch (24) on the second magnetic steel (22) are staggered.

5. A magnetic steel structure for a motor according to claim 2, characterized in that The sum of the axial heights of all the first notches (23) on the first magnetic steel (21) is equal to the sum of the axial heights of all the second notches (24) on the second magnetic steel (22).

6. A magnetic steel structure for a motor according to claim 2, characterized in that The sum of the axial heights of all the first notches (23) on the first magnetic steel (21) and all the second notches (24) on the second magnetic steel (22) is equal to the axial height H of the first magnetic steel (21), and the axial height of the second magnetic steel (22) is equal to the axial height H of the first magnetic steel (21).

7. A magnetic steel structure for a motor according to claim 2, characterized in that The first notch (23) and the second notch (24) complement each other, so that the first magnetic steel (21) and the second magnetic steel (22) can be assembled into a complete square body when they are formed.

8. A magnetic steel structure for a motor according to claim 2, characterized in that The first notch (23) and the second notch (24) are both in the shape of a rectangular parallelepiped.

9. A magnetic steel structure for a motor according to any one of claims 2 to 8, characterized in that The first notch (23) is provided at the lower right corner of the first magnetic steel (21), and the second notch (24) is provided at the upper right corner of the second magnetic steel (22).

10. A magnetic steel structure for a motor according to claim 9, characterized in that The shape and size of the first notch (23) are the same as the shape and size of the second notch (24).

11. A magnetic steel structure for a motor according to any one of claims 2 to 8, characterized in that There are two first notches (23), which are respectively located at the upper and lower ends of the right side of the first magnetic steel (21), and there is one second notch (24), which is located in the middle of the right side of the second magnetic steel (22).

12. A magnetic steel structure for a motor according to claim 11, characterized in that The height of the second notch (24) is twice the height of the first notch (23), and the two first notches (23) enable the right side of the first magnetic steel (21) to form an insertion block, and the insertion block can be inserted into the second notch (24).

13. A magnetic steel structure for a motor according to claim 1, characterized in that The pole arc coefficient of the magnetic steel body (2) is 0.5-0.

99.

14. A magnetic steel structure for a motor according to claim 1, characterized in that The magnetic conductive block is a magnetic conductive ring (1), and the magnetic steel body (2) is continuously and fully adhered to the inner circumferential surface of the magnetic conductive ring (1) by means of an adhesive.

15. A magnetic steel structure for a motor according to claim 14, characterized in that An installation gap is provided between the magnetic steel body (2) and the inner circumferential surface of the magnetic conductive ring (1), and an adhesive is provided in the installation gap.

Images