阅读说明：本技术 一种永磁电机散热结构 (Heat radiation structure of permanent magnet motor ) 是由 王旨杰 周琪华 于 2019-11-07 设计创作，主要内容包括：一种永磁电机散热结构,包括电机本体,所述电机本体设于一壳体的内腔中；所述电机本体包括机壳以及设于机壳内的定子和转子；所述机壳上设有多个凸起,使得壳体与电机本体的机壳之间形成散热通道。本发明一方面结构简单；另一方面,在不改变原有机壳体积的基础之上,还大大提高散热效果。(A heat dissipation structure of a permanent magnet motor comprises a motor body, wherein the motor body is arranged in an inner cavity of a shell; the motor body comprises a shell, a stator and a rotor which are arranged in the shell; the motor shell is provided with a plurality of bulges, so that a heat dissipation channel is formed between the shell and the motor shell of the motor body. On one hand, the structure of the invention is simple; on the other hand, on the basis of not changing the volume of the original organic shell, the heat dissipation effect is also greatly improved.)

1. A heat dissipation structure of a permanent magnet motor comprises a motor body, wherein the motor body is arranged in an inner cavity of a shell; the motor body comprises a shell, a stator and a rotor which are arranged in the shell; the motor is characterized in that the shell is provided with a plurality of bulges, so that a heat dissipation channel is formed between the shell and the shell of the motor body.

2. The heat dissipation structure of claim 1, wherein the stator is provided with a coil winding, and the rotor is provided with a permanent magnet.

3. The heat dissipation structure of a permanent magnet motor according to claim 1 or 2, wherein the housing is adapted to the shape of the housing of the motor body.

4. The heat dissipation structure of a permanent magnet motor according to claim 1, 2 or 3, wherein the plurality of protrusions are spaced apart and arranged in a ring.

5. The heat dissipation structure of a permanent magnet motor according to claim 1, 2 or 3, wherein the motor body is fixed in the inner cavity of the housing through a mounting seat.

6. The heat dissipation structure of a permanent magnet motor as claimed in claim 1, 2 or 3, wherein the distance between adjacent protrusions is 5 ~ 50 mm.

7. The heat dissipation structure of a permanent magnet motor as claimed in claim 1, 2 or 3, wherein the cross-sectional shape of the protrusion is square, trapezoid, arc or triangle.

8. The heat dissipation structure of a permanent magnet motor as claimed in claim 1, 2 or 3, wherein the number of the protrusions is at least three.

9. The heat dissipation structure of a permanent magnet motor according to claim 1, 2 or 3, wherein the permanent magnet adopts a surface-mount structure.

10. The heat dissipation structure of a permanent magnet motor according to claim 1, 2 or 3, wherein a plurality of tooth slots are formed on the inner side of the stator, and coils are wound on the tooth slots.

Technical Field

The invention relates to the technical field of motors, in particular to a heat dissipation structure of a permanent magnet motor.

Background

Permanent magnet motors generate a large amount of heat during operation, and the heat needs to be dissipated in time to avoid damage to surrounding components. Some motors are arranged in the outside, the shell of the motor is usually a metal shell, and heat generated by the operation of the motor can be dissipated outwards through the shell of the motor; some motors need to be arranged in cavities of some devices, and if the motors are arranged in the cavities, and if the space of the cavities is small, when the motors are installed in a matched mode with the cavities, gaps between the motors and the cavities are small, so that the motor shell cannot dissipate heat in time, and further poor heat dissipation performance is caused.

At present, in order to improve the heat dissipation performance of the motor, an additional heat dissipation fin or pipe is usually disposed directly on the housing of the motor. In addition, the existing heat dissipation structure of the permanent magnet motor is designed aiming at poor heat dissipation of the motor shell, and is not designed aiming at the blockage of an air duct caused by the installation of the motor in the inner cavity of other equipment shells.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the heat dissipation structure of the permanent magnet motor, which has the advantages of simple structure, unchanged volume and good heat dissipation effect.

A heat dissipation structure of a permanent magnet motor comprises a motor body, wherein the motor body is arranged in an inner cavity of a shell; the motor body comprises a shell, a stator and a rotor which are arranged in the shell; the motor shell is provided with a plurality of bulges, so that a heat dissipation channel is formed between the shell and the motor shell of the motor body.

Further, a coil winding is arranged on the stator, and a permanent magnet is arranged on the rotor.

Further, the shell is matched with the shell of the motor body in shape.

Furthermore, the plurality of bulges are arranged at intervals and are annularly arranged.

Further, the motor body is fixed in the inner cavity of the shell through the mounting seat.

Further, the distance between the adjacent protrusions is 5 ~ 50 mm.

Further, the cross-sectional shape of the protrusion may be, but is not limited to, square, trapezoid, arc, or triangle.

Further, the number of the protrusions is at least three.

Further, the permanent magnet adopts a surface patch type structure.

Furthermore, a plurality of tooth grooves are formed in the inner side of the stator, and coils are wound on the tooth grooves.

The invention has the beneficial effects that: on one hand, the bulge is arranged on the outer wall of the shell of the motor body, so that the volume of the original shell is not changed, the cost is greatly reduced, and the universality is high; on the other hand, the heat that motor body distributed out can be through the radiating channel who forms effluvium, improves the radiating effect greatly, avoids producing overheated phenomenon and causes the damage to motor body and casing.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention.

The attached drawings indicate the following: 1. a motor body; 2. a housing; 3. a heat dissipation channel; 11. a housing; 111. and (4) protruding.

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples.

As shown in fig. 1: a heat dissipation structure of a permanent magnet motor comprises a motor body 1, wherein the motor body 1 is arranged in an inner cavity of a shell 2; the motor body 1 comprises a shell 11, a stator and a rotor which are arranged in the shell; the casing 11 is provided with a plurality of protrusions 111, so that a heat dissipation channel 3 is formed between the casing 2 and the casing 11 of the motor body 1.

The technical scheme has the following advantages: by arranging the protrusion 111, on one hand, when the motor body is arranged in an inner cavity of a shell, a gap is formed, namely a heat dissipation channel is formed, so that heat emitted by the motor body is dissipated through the heat dissipation channel, the heat dissipation effect is greatly improved, and the motor body and the shell cannot be damaged; on the other hand, the bulge is arranged on the basis of keeping the volume of the original shell, and is not additionally arranged on the outer side of the shell, so that the space of the inner cavity of the shell is not increased, the volume of the motor body is not increased, and the heat dissipation effect is also improved. For example, the casing may be provided with a recess to form a plurality of protrusions.

In the present embodiment, the plurality of protrusions 111 are spaced and arranged in a ring shape, preferably, the number of the protrusions 111 is at least two, further preferably, the number of the protrusions is at least three, and the protrusions can be symmetrically distributed to form at least three heat dissipation channels, wherein the spacing between the plurality of protrusions can be arbitrarily set, the spacing is designed according to the outer diameter volume of the casing and the number of the protrusions, preferably, the spacing between adjacent protrusions is 5 ~ 50mm, further preferably 10 ~ 20mm, if the spacing is too small, the heat dissipation effect is easily insignificant, further, the cross-sectional shape of the protrusions can be, but is not limited to, a square shape, a trapezoid shape, an arc shape, or a triangle shape, the shape is preferably a structure adapted to the casing inner cavity, for example, the casing inner cavity is an arc shape, and the contact surface between the protrusions and the inner cavity is also designed as an arc shape.

In this embodiment, the motor body 1 is fixed in the inner cavity of the housing 2 through the mounting seat. In addition, if the housing is a sealed structure, a vent hole may be provided in the housing.

In this embodiment, a plurality of tooth spaces are provided on the inner side of the stator, and coils are wound on the tooth spaces. For example: the stator has 12 slots in its inner circumference to form 12 teeth with pole shoes at the ends of each tooth. The coils are directly wound on the stator tooth poles for concentrated winding, and the total number of the coils is 12.

Permanent magnets are arranged on the outer circumference of the rotor, for example, the rotor has 8 poles (4 pairs of poles), the 8 permanent magnets are in a surface patch type, four poles are blue, four poles are red, the magnetic field direction of the magnetic pole is radial, the magnetic field direction of the blue permanent magnet is outward, and the magnetic field direction of the blue permanent magnet is N pole; the magnetic field direction of the red permanent magnet is inward and is S pole. Since the specific working principle and the connection structure of the permanent magnet motor are already the prior art, detailed description is omitted here.

The working principle of the embodiment is as follows: install motor body 1 fixed back in the cavity of casing 2, motor body 1 can produce a large amount of heats in the course of the work, and the heat is discharged through the heat dissipation channel 3 that protruding 111 formed in proper order, and the radiating effect is showing.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any simple changes or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are within the scope of the present invention.