CN108347112B

CN108347112B - Rotor structure and motor with same

Info

Publication number: CN108347112B
Application number: CN201810201973.XA
Authority: CN
Inventors: 吴泽华; 高晓峰; 黄润宇; 李庆; 陈东锁
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: 2018-03-12
Filing date: 2018-03-12
Publication date: 2020-11-10
Anticipated expiration: 2038-03-12
Also published as: CN108347112A

Abstract

The invention provides a rotor structure and a motor with the same. The rotor structure comprises a magnetic ring; the rotor disc, the magnetic ring is connected with the rotor disc, and the surface of the rotor disc is provided with protruding arris, and protruding arris outwards extends along the radial direction of the rotor disc, and protruding arris is used for increasing the width of the magnetic circuit in the thickness direction of the magnetic ring. The convex edge is arranged on the rotor disc, so that the width of a magnetic circuit formed by the magnetic ring on the rotor disc can be effectively increased. The magnetic ring is arranged in such a way that the magnetic circuit is prevented from being easily saturated, the reliability of the rotor structure is effectively improved, and the performance of the motor with the rotor structure is improved.

Description

Rotor structure and motor with same

Technical Field

The invention relates to the technical field of motor equipment, in particular to a rotor structure and a motor with the same.

Background

In the prior art, a permanent magnet rotor core of a conventional axial magnetic field motor is generally of a disc-shaped structure, in order to save materials, the thickness of a chassis is often designed to be thinner, a magnetic circuit is narrower, magnetic saturation is easy to occur, and the problem of poor motor performance is caused as shown in fig. 1, wherein 11 'is a permanent magnet, 20' is a rotor disc, S is the S pole of the permanent magnet, and N is the N pole of the permanent magnet.

Disclosure of Invention

The invention mainly aims to provide a rotor structure and a motor with the same, and aims to solve the problem of poor performance of the motor in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a rotor structure comprising: a magnetic ring; the rotor disc, the magnetic ring is connected with the rotor disc, and the surface of the rotor disc is provided with protruding arris, and protruding arris outwards extends along the radial direction of the rotor disc, and protruding arris is used for increasing the width of the magnetic circuit in the thickness direction of the magnetic ring.

Furthermore, the magnetic ring comprises a plurality of permanent magnets which are sequentially connected to form an annular structure and located on one side of the rotor disc, and the S pole of one permanent magnet in two adjacent permanent magnets is connected with the N pole of the other permanent magnet.

Furthermore, protruding stupefied be a plurality of, and a plurality of protruding stupefied are located the junction of two adjacent permanent magnets respectively, and protruding stupefied extends the setting along the junction of permanent magnet.

Furthermore, the cross section of the convex edge is triangular, square and semicircular.

Furthermore, the connection part of the convex edge and the rotor disc is in arc surface transition.

Furthermore, the junction of two adjacent permanent magnets near one side of the rotor disc is provided with an accommodating concave part, and the convex edge is arranged on the surface of the rotor disc near one side of the permanent magnets and is positioned in the accommodating concave part.

Further, the convex edge is arranged on the surface of the rotor disc far away from the permanent magnet.

Further, the middle part of the rotor disc is provided with a shaft hole.

Furthermore, a plurality of radiating holes are formed in the rotor disc and are arranged at intervals along the circumferential direction of the shaft hole.

According to another aspect of the present invention, there is provided an electric machine comprising a rotor structure as described above.

By applying the technical scheme of the invention, the convex edge is arranged on the rotor disc, so that the width of a magnetic circuit formed by the magnetic ring on the rotor disc can be effectively increased. The arrangement can avoid the condition that a magnetic circuit of the magnetic ring is easily saturated, effectively improves the reliability of the rotor structure, and then improves the performance of the motor with the rotor structure.

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 schematic view of a magnetic circuit structure of a rotor structure in the prior art;

FIG. 2 shows a schematic structural view of a first embodiment of a rotor disc according to the present invention;

FIG. 3 shows a schematic structural view of a second embodiment of a rotor disc according to the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic view illustrating an assembly structure of a rotor disc and a magnet ring according to the present invention;

fig. 6 shows a schematic structural view of a first embodiment of the ridges of the rotor structure according to the invention;

fig. 7 shows a schematic structural view of a second embodiment of the ridges of the rotor structure according to the invention;

fig. 8 shows a schematic structural view of a third embodiment of the ridges of the rotor structure according to the invention;

fig. 9 shows a schematic structural view of a fourth embodiment of the ribs of the rotor structure according to the invention.

Wherein the figures include the following reference numerals:

10. a magnetic ring; 11. a permanent magnet;

20. a rotor disk; 21. convex edges; 22. a shaft hole; 23. heat dissipation holes;

30. an accommodation recess.

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 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 forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings 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 terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Referring to fig. 2 to 9, according to an embodiment of the present invention, a rotor structure is provided.

Specifically, as shown in fig. 1 to 6, the rotor structure includes a magnetic ring 10 and a rotor disc 20. The magnetic ring 10 is connected with a rotor disc 20, and the surface of the rotor disc 20 is provided with a convex edge 21. The projection 21 extends outward in the radial direction of the rotor disc 20, and the projection 21 serves to increase the width of the magnetic path in the thickness direction of the magnetic ring 10.

In this embodiment, the rotor disc is provided with the protruding ribs, so that the width of the magnetic path formed by the magnetic ring on the rotor disc can be effectively increased. The arrangement can avoid the condition that a magnetic circuit of the magnetic ring is easily saturated, effectively improves the reliability of the rotor structure, and then improves the performance of the motor with the rotor structure.

The magnetic ring 10 comprises a plurality of permanent magnets 11. The plurality of permanent magnets 11 are sequentially connected to form a ring structure and located at one side of the rotor disc 20, and the S pole of one permanent magnet 11 of two adjacent permanent magnets 11 is connected with the N pole of the other permanent magnet 11. This arrangement can effectively improve the performance of the rotor structure.

The plurality of protruding arris 21 are located at the junction of two adjacent permanent magnets 11, and the protruding arris 21 extends along the junction of the permanent magnets 11. This arrangement can effectively increase the width of the magnetic path at the junction of two adjacent permanent magnets 11.

Preferably, as shown in fig. 6 to 9, the cross-section of the ridge 21 is triangular, square, and semicircular. This arrangement can serve to increase the width of the magnetic path between adjacent permanent magnets.

In order to further improve the performance of the rotor structure, the junction of the convex edge 21 and the rotor disc 20 may be set to be a cambered transition.

As shown in fig. 9, a receiving recess 30 is provided at a connection portion of two adjacent permanent magnets 11 on a side close to the rotor disc 20, and the protruding edge 21 is provided on a surface of the rotor disc 20 on a side close to the permanent magnets 11 and located in the receiving recess 30. This arrangement can further serve to increase the width of the magnetic path between the permanent magnets. Of course, the ribs 21 may also be provided on the surface of the rotor disc 20 remote from the permanent magnets 11.

Further, a shaft hole 22 is provided at the center of the rotor disk 20. The rotor disk 20 is further provided with a plurality of heat radiation holes 23, and the plurality of heat radiation holes 23 are arranged at intervals along the circumferential direction of the shaft hole 22. The arrangement can effectively improve the structural performance of the rotor.

The rotor structure in the above embodiments may also be used in the technical field of motor equipment, that is, according to another aspect of the present invention, a motor is provided. The motor comprises a rotor structure, and the rotor structure is the rotor structure in the embodiment.

In particular, in the embodiment, the adopted rotor disc structure can widen the magnetic circuit, improve the performance of the motor,

the magnetic circuit of the rotor core can be widened, magnetic energy is enhanced, the performance and efficiency of the motor are improved, the metal materials of the rotor disk can be saved, the utilization rate of the materials is maximized, the convex edges are divided into an inner convex structure and an outer convex structure, the permanent magnet can be well positioned by the inner convex structure, and the appearance attractiveness of the rotor disk can be improved by the outer convex structure. The convex edge has various structures, and is divided into circular arc, rectangle and triangle according to the shape.

When the convex edge structure of the outward convex shape is adopted, convective air can be formed in the motor cavity, so that heat of the winding and the iron core is quickly dissipated to the external environment, and the effect of reducing the temperature rise of the motor is remarkable.

The convex edge is arranged between the two magnetic poles, which is beneficial to magnetic conduction. In order to solve the technical background problem, a new structure rotor disc (equivalent to a rotor core) of an axial motor is provided, and a structure of a magnetic circuit convex edge is added on the basis of a conventional disc. The convex edge is positioned between every two permanent magnets of the N pole and the S pole, and a magnetic circuit between the magnetic poles can be widened. The magnetic rings are assembled on the rotor disc and arranged in sequence according to N, S poles to form an n-pole permanent magnet rotor, as shown in fig. 5.

The specific processing implementation mode is as follows:

the first step is as follows: opening a mould, and casting a rotor disc with convex edges;

the second step is that: assembling magnetic rings on a rotor disc, and sequentially arranging the magnetic rings according to N, S poles to form n-pole permanent magnet rings;

the third step: the magnetic path trend that the N pole is out and the S pole is back is adopted between the permanent magnets, the rotor disc forms the closure of the magnetic force line through the thickened part, the magnetic force line can not be saturated, and the loss of the magnetic energy can be reduced.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

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 rotor structure, comprising:

a magnetic ring (10);

the magnetic ring comprises a rotor disc (20), the magnetic ring (10) is connected with the rotor disc (20), convex edges (21) are arranged on the surface of the rotor disc (20), the convex edges (21) extend outwards along the radial direction of the rotor disc (20), and the convex edges (21) are used for increasing the width of a magnetic circuit in the thickness direction of the magnetic ring (10);

the magnetic ring (10) comprises a plurality of permanent magnets (11), the permanent magnets (11) are sequentially connected to form an annular structure and are located on one side of the rotor disc (20), the S pole of one permanent magnet (11) in two adjacent permanent magnets (11) is connected with the N pole of the other permanent magnet (11), the number of convex edges (21) is multiple, and the convex edges (21) are respectively located at the connecting positions of the two adjacent permanent magnets (11);

the convex edge (21) is arranged on the surface of the rotor disc (20) far away from the permanent magnet (11).

2. A rotor structure according to claim 1, characterised in that the ridges (21) extend along the joints of the permanent magnets (11).

3. A rotor structure according to claim 1, characterised in that the cross-section of the ridges (21) is triangular, square, semi-circular.

4. The rotor structure according to claim 1, characterized in that the junction of the ridges (21) and the rotor disc (20) is in a cambered transition.

5. A rotor structure according to claim 1, characterized in that the rotor disc (20) is provided with a shaft hole (22) in the middle.

6. The rotor structure according to claim 5, wherein a plurality of heat radiating holes (23) are further provided in the rotor disk (20), and the plurality of heat radiating holes (23) are provided at intervals in the circumferential direction of the shaft hole (22).

7. An electrical machine comprising a rotor structure, characterized in that the rotor structure is a rotor structure according to any one of claims 1 to 6.