CN206323223U - Permanent magnets with chamfered structure - Google Patents

Abstract

The utility model discloses a permanent magnet with a chamfer structure, which comprises a permanent magnet body; the permanent magnet body is provided with a top and a bottom, two symmetrical first chamfers are formed on the top of the permanent magnet body, two symmetrical second chamfers are formed on the bottom of the permanent magnet body, and each first chamfer corresponds to each second chamfer; the first chamfer and the second chamfer are symmetrical on the permanent magnet body, so that the permanent magnet body can maintain stable magnetic flux in the using process.

Description

Permanent magnets with chamfered structure

technical field

The utility model relates to a magnet, in particular to a permanent magnet with a chamfered structure applied in a motor rotor.

Background technique

With the rapid development of motors, there are many types of motors on the market, such as DC motors, synchronous motors, etc. The known motors include a rotor core, and the rotor core is provided with multiple sets of magnet slots. And radially spaced around the rotor core, the rotor core will be installed with permanent magnets to provide the required magnetic field for the motor to rotate.

The permanent magnet in the prior art is shown in Figure 5, and described permanent magnet 90 is the structure of cuboid, and is arranged in the magnet slot group of described rotor iron core separately, and the material price of current permanent magnet 90 is higher, in order to improve The use efficiency of the rotor core, if there are multiple sets of magnet slots, the number of permanent magnets 90 required will increase, which will increase the cost of producing the motor. If the volume of the permanent magnets 90 is reduced in order to reduce costs In order to reduce the material consumption of the permanent magnet 90 , however, the magnetic flux of the permanent magnet 90 will be reduced, thereby reducing the efficiency of the rotor core.

In the prior art, such as the Chinese patent No. CN102223039B (hereinafter referred to as the previous case), a motor and a permanent magnet are disclosed, which include a motor with permanent magnets and the permanent magnets used. The upper surface is designed to be arc-shaped to reduce the cogging torque and torque ripple. Although the previous proposal can effectively reduce the cogging torque and torque ripple, the arc-shaped structure will increase the permanent The amount of material used in the magnet increases the production cost, and the magnetic flux of the permanent magnet in use will also be affected, so there is room for improvement in the prior art.

Utility model content

In view of the above-mentioned problems in the prior art, the utility model provides a permanent magnet with a chamfered structure, through which the permanent magnet can maintain a stable magnetic flux during use.

The technical means adopted to achieve the above-mentioned purpose is to make the aforementioned permanent magnet with a chamfered structure, which includes:

A permanent magnet body, the permanent magnet body has a top and a bottom, the top of the permanent magnet body is formed with two symmetrical first chamfers, and the bottom of the permanent magnet body is formed with two symmetrical second chamfers. Each first chamfer corresponds to each second chamfer.

In one embodiment, the above-mentioned permanent magnet body has a front side and a rear side that are parallel to each other, one of the first chamfers is located between the top of the permanent magnet body and the front side, and the other The position of the first chamfer is between the top of the permanent magnet body and the rear side.

In one embodiment, one of the second chamfers is located between the bottom of the permanent magnet body and the front side, and the other second chamfer is located between the bottom of the permanent magnet body and the front side. between the rear sides.

In an embodiment, each first chamfer includes a first cut plane.

In one embodiment, each second chamfer includes a second cut surface.

In one embodiment, each first cut plane is a plane; each second cut plane is a plane.

In one embodiment, each first cut surface forms an inner concave arc surface; each second cut surface is respectively concaved to form an inner concave arc surface.

In one embodiment, each of the first cut surfaces forms a convex arc surface; each of the second cut surfaces forms a convex arc surface.

It can be known from the above structure that the permanent magnet body forms a symmetrical first chamfer and second chamfer, so that the permanent magnet body can maintain a stable magnetic flux when in use; in addition, due to the formation of the permanent magnet body Each first chamfer and each second chamfer can also reduce the material usage of the permanent magnet body, so as to reduce the production cost of the permanent magnet body.

Description of drawings

Fig. 1 is a perspective view of a preferred embodiment of the utility model.

Fig. 2 is a side view of a chamfering structure in a preferred embodiment of the present invention.

Fig. 3 is a side view of another chamfering structure of a preferred embodiment of the present invention.

Fig. 4 is a side view of another chamfering structure of a preferred embodiment of the present invention.

Fig. 5 is a perspective view of a conventional permanent magnet.

detailed description

The technical means adopted by the utility model to achieve the intended purpose of the utility model are further elaborated below in conjunction with the accompanying drawings and preferred embodiments of the utility model.

Regarding the first preferred embodiment of the permanent magnet with chamfered structure of the present invention, please refer to FIGS. 1 and 2 , which includes a permanent magnet body 10 .

The permanent magnet body 10 is a cuboid, and has a top, a bottom, and two parallel front sides 11 and a rear side 12, and the top of the permanent magnet body 10 is formed with two symmetrical first chamfers 13. The bottom of the permanent magnet body 10 is formed with two symmetrical second chamfers 14, and each first chamfer 13 corresponds to each second chamfer 14. In this embodiment, one of the first chamfers 13 The position is between the top of the permanent magnet body 10 and the front side 11, and the position of another first chamfer 13 is between the top of the permanent magnet body 10 and the rear side 12, one of which The position of the second chamfer 14 is between the bottom of the permanent magnet body 10 and the front side 11, and the position of another second chamfer 14 is between the bottom of the permanent magnet body 10 and the rear side 12, the first chamfer 13 on the top of the permanent magnet body 10 and the front side 11 corresponds to the second chamfer 14 on the bottom of the permanent magnet body 10 and the front side 11, the permanent magnet The first chamfer 13 on the top of the body 10 and the rear side 12 corresponds to the second chamfer 14 on the bottom of the permanent magnet body 10 and the rear side 12 .

In this embodiment, the top of the permanent magnet body 10 has a top surface, the bottom of the permanent magnet body 10 has a bottom surface, and the first chamfer between the top of the permanent magnet body 10 and the front side 11 13 is composed of the top surface of the permanent magnet body 10, a first cut surface 131 and the front side 11, the first chamfer 13 between the top of the permanent magnet body 10 and the rear side 12 , is composed of the top surface of the permanent magnet body 10 , another first cut surface 131 and the rear side 12 , and in this embodiment, each first cut surface 131 is a plane.

In this embodiment, the second chamfer 14 between the bottom of the permanent magnet body 10 and the front side 11 is formed by the bottom surface of the permanent magnet body 10, a second cut surface 141 and the front side 11. The second chamfer 14 between the bottom of the permanent magnet body 10 and the rear side 12 is composed of the bottom surface of the permanent magnet body 10, another second cut surface 141 and the rear side 12, In this embodiment, each second section 141 is a plane.

Regarding another structure of each first cut surface 131 and each second cut surface 141, please refer to FIG. curved surface.

Regarding yet another structure of each first cut surface 131 and each second cut surface 141, please refer to FIG. curved surface.

Based on the above structure, a symmetrical first chamfer 13 and a symmetrical second chamfer 14 are respectively formed on the top and bottom of the permanent magnet body 10 to reduce the material usage of the permanent magnet body 10, and The magnetic flux of the permanent magnet body 10 will not be reduced during use, so as to achieve the purpose of reducing cost while maintaining stable use performance.

The above description is only the preferred embodiment of the present utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above with the preferred embodiment, it is not intended to limit the utility model. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present utility model, may use the technical content disclosed above to make some changes or be modified into equivalent embodiments with equivalent changes, but all those that do not depart from the technical solution of the present utility model Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model still belong to the scope of the technical solution of the utility model.

Claims (8)

1. a kind of permanent magnet with chamfering structure, it is characterised in that the permanent magnet, it includes：

One permanent-magnet body, the permanent-magnet body has a top and a bottom, the top of the permanent-magnet body Two the first symmetrical chamferings are formed with, the bottom of the permanent-magnet body is formed with two the second symmetrical chamferings, each First chamfering is corresponding with each second chamfering.

2. the permanent magnet according to claim 1 with chamfering structure, it is characterised in that the permanent-magnet body tool There are two parallel a leading flanks and a trailing flank, the position of one of them the first chamfering is on the top of the permanent-magnet body Between portion and the leading flank, the position of another the first chamfering is at the top of the permanent-magnet body and the rear side Between face.

3. the permanent magnet according to claim 2 with chamfering structure, it is characterised in that one of them the second chamfering Position is that between the bottom of the permanent-magnet body and the leading flank, the position of another the second chamfering is described Between the bottom of permanent-magnet body and the trailing flank.

4. the permanent magnet according to claim 3 with chamfering structure, it is characterised in that each first chamfering is wrapped respectively Include one first tangent plane.

5. the permanent magnet according to claim 4 with chamfering structure, it is characterised in that each second chamfering is wrapped respectively Include one second tangent plane.

6. the permanent magnet according to claim 5 with chamfering structure, it is characterised in that each first tangent plane is respectively One plane；Each second tangent plane is a plane.

7. the permanent magnet according to claim 5 with chamfering structure, it is characterised in that each first tangent plane distinguishes shape Into an inner concave arc surface；Each second tangent plane is recessed an inner concave arc surface respectively.

8. the permanent magnet according to claim 5 with chamfering structure, it is characterised in that each first tangent plane distinguishes shape Into an outer convex globoidal；Each second tangent plane forms an outer convex globoidal respectively.