CN107394923B - Rotor core and rotor - Google Patents
Rotor core and rotor Download PDFInfo
- Publication number
- CN107394923B CN107394923B CN201710764394.1A CN201710764394A CN107394923B CN 107394923 B CN107394923 B CN 107394923B CN 201710764394 A CN201710764394 A CN 201710764394A CN 107394923 B CN107394923 B CN 107394923B
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- magnetic steel
- rotor core
- steel groove
- slot
- groove
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
Abstract
The invention discloses a rotor core and a rotor, wherein a first magnetic steel groove and a second magnetic steel groove are formed in the rotor core, the first magnetic steel groove and the second magnetic steel groove respectively comprise a plurality of magnetic steel grooves which are arranged at intervals along the circumferential direction of the rotor core, the second magnetic steel groove is formed in the inner side of the first magnetic steel groove, the second magnetic steel groove is opposite to the area between two adjacent first magnetic steel grooves in the radial direction of the rotor core, one end of the second magnetic steel groove is adjacent to one first magnetic steel groove, and the other end of the second magnetic steel groove extends towards the center of the rotor core. According to the rotor core provided by the embodiment of the invention, the demagnetization resistance can be ensured, and the cost can be reduced.
Description
Technical Field
The invention relates to the technical field of energy conversion equipment, in particular to a rotor core and a rotor.
Background
In the related art, rotors of rotary refrigeration compressors are generally made of rubidium, iron and boron materials with strong coercive force, and the rotors have strong demagnetization resistance but high cost.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to provide a rotor core that can reduce the cost while securing the demagnetization resistance.
According to the rotor core provided by the embodiment of the invention, the rotor core is provided with the first magnetic steel grooves and the second magnetic steel grooves, the first magnetic steel grooves and the second magnetic steel grooves respectively comprise a plurality of magnetic steel grooves which are arranged at intervals along the circumferential direction of the rotor core, the second magnetic steel grooves are arranged at the inner sides of the first magnetic steel grooves, the second magnetic steel grooves are opposite to the areas between two adjacent first magnetic steel grooves in the radial direction of the rotor core, one end of each second magnetic steel groove is adjacent to one first magnetic steel groove, and the other end of each second magnetic steel groove extends towards the center of the rotor core.
According to the rotor core provided by the embodiment of the invention, the demagnetization resistance can be ensured, and the cost can be reduced.
In addition, the rotor core according to the above embodiment of the present invention may further have the following additional technical features:
in one embodiment of the invention, the second magnetic steel groove is not communicated with the first magnetic steel groove; or the second magnetic steel groove is communicated with the corresponding first magnetic steel groove.
In an embodiment of the present invention, the second magnetic steel slots are circular arcs with middle portions protruding in a circumferential direction of the rotor core, and the plurality of second magnetic steel slots protrude in the same direction.
In one embodiment of the present invention, an end surface of the second magnet steel slot extends in the axial direction of the rotor core and is opposed to one of the first magnet steel slots.
In one embodiment of the present invention, the first magnetic steel slot is rectangular extending in a radial direction of the rotor core.
In one embodiment of the present invention, slits are provided on both sides of the first magnetic steel slot in the circumferential direction of the rotor core.
In one embodiment of the present invention, the slits on both sides of the first magnetic steel slot are opened in a direction away from the center of the rotor core.
In one embodiment of the present invention, the outer circumferential surface of the rotor core has a recess that faces the first magnet steel slot, an inner end of the slit is opposite to the recess in a radial direction of the rotor core, and an outer end of the slit is not opposite to the recess in the radial direction of the rotor core.
In one embodiment of the present invention, an outer circumferential surface of the rotor core is recessed toward the first magnet steel slot.
In one embodiment of the invention, the number of the first magnetic steel grooves is the same as that of the second magnetic steel grooves.
The present invention also provides a rotor comprising: the rotor core is according to aforementioned rotor core, the second magnetism steel slot with the second magnetism steel slot is all filled with permanent-magnet material.
In an embodiment of the present invention, a rubidium-iron-boron permanent magnetic material with a strong coercive force is placed in the first magnetic steel groove, and a ferrite permanent magnetic material with a low coercive force is placed in the second magnetic steel groove.
In one embodiment of the invention, the first magnetic steel groove is magnetized tangentially and parallelly, and the second magnetic steel groove is magnetized radially.
Drawings
Fig. 1, 4, 6, 8 and 10 are schematic views of rotor cores according to different embodiments of the present invention.
Fig. 2, 5, 7, and 9 are schematic views of rotors of different embodiments of the present invention.
Fig. 3 is a partial schematic view of a rotor core of one embodiment of the present invention.
Reference numerals: rotor core 1, first magnet steel groove 101, second magnet steel groove 102, step portion 103, communicating part 104, slit 105, sunken 106, first circular arc section 1071, second circular arc section 1072, face group 107, third circular arc section 1073, first straight line section 1074, second straight line section 1075, shaft hole 108, through-hole 109.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
With reference to fig. 1 to 9, according to the rotor core 1 of the embodiment of the present invention, the rotor core 1 may be applied to a motor or a generator, the rotor core 1 is provided with a first magnetic steel slot 101 and a second magnetic steel slot 102, each of the first magnetic steel slot 101 and the second magnetic steel slot 102 includes a plurality of magnetic steel slots arranged at intervals along a circumferential direction (a direction surrounding the rotor core 1) of the rotor core 1, the second magnetic steel slot 102 is provided inside the first magnetic steel slot 101 (a side close to a center line of the rotor core 1), or the first magnetic steel slot 101 is provided outside the second magnetic steel slot 102 (a side far from the center line of the rotor core 1), and a region between the second magnetic steel slot 102 and two adjacent first magnetic steel slots 101 is opposite to each other in a radial direction (a direction along a radius of the rotor core) of the rotor core 1.
According to the rotor core 1 provided by the embodiment of the invention, the first magnetic steel groove 101 and the second magnetic steel groove 102 can be magnetized, the material cost of the rotor can be greatly reduced, and the demagnetization resistance of the rotor cannot be reduced.
In the present invention, the region between two adjacent first magnetic steel grooves 101 includes the region where the two magnetic steel grooves are located.
In addition, the plurality of first magnetic steel slots 101 may be provided in a uniformly spaced arrangement in the circumferential direction (the direction surrounding the rotor core 1), or may be provided in a form of a symmetrical arrangement about a plane passing through the axis (the axis of the rotor core 1). Likewise, the plurality of second magnetic steel slots 102 may be arranged at even intervals in the circumferential direction (the direction around the rotor core 1), or may be arranged symmetrically about a plane passing through the axis (the axis of the rotor core 1).
A shaft hole is arranged at the center of the rotor core 1, and a through hole can be further arranged at the inner end position adjacent to the second magnetic steel slot 102.
In addition, the rotor core 1 of the present invention may have the following embodiments, which may be provided individually or may be combined with one or more other embodiments without conflict.
Example 1
The second magnetic steel groove 102 may not be in communication with the first magnetic steel groove 101.
Example 2
As shown in fig. 3, unlike embodiment 1, the second magnetic steel groove 102 communicates with at least one adjacent first magnetic steel groove 101, that is, the second magnetic steel groove 102 may communicate with both of the adjacent first magnetic steel grooves 101, or with one of the adjacent first magnetic steel grooves. Specifically, the second magnetic steel groove 102 is disposed at a position radially opposite to two adjacent first magnetic steel grooves 101, and thus, the two first magnetic steel grooves 101 are the first magnetic steel grooves 101 adjacent to the second magnetic steel groove 102.
Further, as shown in fig. 3, the first magnet steel slot 101 and the second magnet steel slot 102 which are communicated with each other are separated by the step portion 103 and are communicated by the communication portion 104, and the step portion 103 and the communication portion 104 between the first magnet steel slot 101 and the second magnet steel slot 102 which are communicated with each other are arranged alternately in the axial direction of the rotor core 1. That is, the communication positions of the first magnetic steel groove 101 and the second magnetic steel groove 102 which are communicated with each other at intervals in the axial direction, for example, in the axial direction, the first magnetic steel groove and the second magnetic steel groove are communicated with each other at intervals, and are separated from each other at intervals. The partition and the communication are sections of a plane perpendicular to the axial direction, and in the axial direction, the first magnetic steel groove 101 and the second magnetic steel groove 102 may be communicated in one section, and the first magnetic steel groove 101 and the second magnetic steel groove 102 may be partitioned by a step 103 in another section. As a whole, if the communication portion 104 is provided, the corresponding first magnetic steel groove 101 and second magnetic steel groove 102 are communicated with each other.
Advantageously, as shown in fig. 3, the second magnetic steel slot 102 communicates with each of the adjacent two first magnetic steel slots 101, and the step portions 103 and the communicating portions 104 are arranged alternately in a cross section perpendicular to the axis of the rotor core 1.
In the same cross section perpendicular to the axis, all of the plurality of step portions 103 and the plurality of communication portions 104 may be provided in a symmetrical form (for example, symmetrical with respect to a plane passing through the axis), or may be provided in a form in which the step portions 103 and the communication portions 104 are staggered in the axial direction.
Moreover, two or more of each adjacent pair may be provided symmetrically with respect to a plane passing through the axis.
Example 3
With reference to fig. 1 and 2, embodiment 3 includes a second magnetic steel slot 102 with a specific shape, wherein two ends of the second magnetic steel slot 102 are respectively adjacent to two adjacent first magnetic steel slots 101.
Further, both ends of the second magnet steel slot 102 are respectively opposed to a part of the adjacent first magnet steel slot 101 in the radial direction of the rotor core 1.
Preferably, both ends of the second magnetic steel slot 102 are respectively opposite to and communicate with a part of the adjacent first magnetic steel slot 101 in the radial direction of the rotor core 1.
Of course, two ends of the second magnetic steel groove 102 may not be communicated with the adjacent first magnetic steel groove 101, or one end of the second magnetic steel groove 102 is communicated with one first magnetic steel groove 101, and the other end is not communicated with the other magnetic steel groove.
Example 4
Referring to fig. 1 and 2, in this embodiment, the second magnetic steel slot 102 is a circular arc with a middle portion protruding toward the central axis of the rotor core 1.
Example 5
With reference to fig. 4 and 5, unlike embodiment 3, this embodiment has a second magnet steel slot 102 with another shape, one end of the second magnet steel slot 102 is adjacent to one first magnet steel slot 101, and the other end extends toward the center of the rotor core 1, wherein the second magnet steel slot 102 may extend along a straight line or a curved line (e.g., an arc shape).
The second magnetic steel groove 102 may not be communicated with the first magnetic steel groove 101, or the second magnetic steel groove 102 may also be communicated with the corresponding first magnetic steel groove 101.
Preferably, as shown in fig. 4, the second magnet steel slots 102 are circular arc-shaped with the middle portion protruding in the circumferential direction of the rotor core 1, and the plurality of second magnet steel slots 102 protrude in the same direction (clockwise or counterclockwise). Of course, it is also possible to provide shapes that are convex in different directions.
Further preferably, the end face of the second magnet steel slot 102 extends in the radial direction of the rotor core 1 and is opposite to the one first magnet steel slot 101.
In addition, the end surface of the second magnetic steel groove 102 may extend from the radial center line of one first magnetic steel groove 101.
Example 6
With reference to fig. 6 to 9, a second magnet steel slot 102 of still another shape is described, and the second magnet steel slot 102 extends in the radial direction of the rotor core 1.
The outer end of the second magnet steel slot 102 and the first magnet steel slot 101 are dislocated in the radial direction of the rotor core 1 and generate a step portion 103, or the second magnet steel slot 102 and the first magnet steel slot 101 corresponding to each other are not completely aligned in the radial direction, or a part of the first magnet steel slot 101 and the second magnet steel slot 102 opposite to each other may be aligned and the other part may be dislocated.
Preferably, the second magnetic steel slots 102 are rectangular extending in the radial direction of the rotor core 1, but the second magnetic steel slots 102 may also be bar-shaped or other shapes.
Advantageously, the first magnet steel slots 101 are rectangular extending in the radial direction of the rotor core 1.
In addition, the second magnetic steel groove 102 may not be communicated with the first magnetic steel groove 101; or the second magnetic steel groove 102 can be communicated with the corresponding first magnetic steel groove 101.
Example 7
The first magnet steel slot 101 is rectangular extending in the radial direction of the rotor core 1.
It should be noted that the shapes of the first magnetic steel groove 101 and the second magnetic steel groove 102 are described above, but the invention is not to be construed as being limited to the scope of the invention.
Example 8
With reference to fig. 6 to 9, embodiment 8 may be applied to any other embodiment in the present application, and specifically, slits 105 are provided on both sides of the first magnet steel slot 101 in the circumferential direction of the rotor core 1.
Further, the slits 105 on both sides of the first magnet steel slot 101 are opened in a direction away from the center of the rotor core 1.
Preferably, the outer peripheral surface of the rotor core 1 has a recess 106 recessed toward the first magnet steel slot 101, the inner end of the slit 105 is opposed to the recess 106 in the radial direction of the rotor core 1, and the outer end of the slit 105 is not opposed to the recess 106 in the radial direction of the rotor core 1, that is, the outer end of the slit 105 extends to the outside of the recess 106 (a position not corresponding to the recess 106 in the radial direction).
Example 9
Embodiment 9 can be applied to other embodiments as well.
In the present invention, referring to fig. 1, 4, 6, and 8, the outer circumferential surface of rotor core 1 is recessed 106 toward first magnet steel slot 101.
Further, the outer peripheral surface of the rotor core 1 includes a plurality of surface groups 107 sequentially connected in the circumferential direction of the rotor core 1, and the surface groups 107 include: a first circular arc segment 1071, a second circular arc segment 1072, a third circular arc segment 1073, a first straight line segment 1074 and a second straight line segment 1075, the second circular arc segment 1072 being connected to one end of the first circular arc segment 1071; the third arc segment 1073 is connected to the other end of the first arc segment 1071; the first straight line segment 1074 is connected with the second circular arc segment 1072; the second straight segment 1075 is connected to the third circular arc segment 1073, wherein the first straight segment 1074 and the second straight segment 1075 of two adjacent surface groups 107 are connected and form the recess 106.
Further, first circular arc section 1071 is concentric with rotor core 1, and second circular arc section 1072 is not concentric and tangent with first circular arc section 1071, and third circular arc section 1073 is not concentric and tangent with first circular arc section 1071.
In addition, the first straight line segment 1074 and the second straight line segment 1075 are both located outside the first magnetic steel slot 101, and the first straight line segment 1074 and the second straight line segment 1075 are both directly opposite to one first magnetic steel slot 101.
Example 10
Embodiment 10 is equally applicable to any of the embodiments described above.
In the invention, the number of the first magnetic steel grooves 101 is the same as that of the second magnetic steel grooves 102.
Example 11
As shown in fig. 10, the rotor core 1 is provided in a plurality of axially laminated segments. Each section of the rotor core 1 is provided with a first magnetic steel slot 101 and a second magnetic steel slot 102.
Further, the second magnetic steel slots 102 in two adjacent segments of the rotor core 1 are opposite in the axial direction, and the first magnetic steel slots 101 are dislocated in the axial direction.
And the difference of the adjacent two sections of laminated rotor iron cores in the circumferential direction is a pair of polar angles.
The second magnetic steel groove 102 and the first magnetic steel groove 101 may not be communicated; or the second magnetic steel grooves 102 are communicated with the corresponding first magnetic steel grooves 101.
Further, the first magnetic steel slot 101 is a rectangle extending in the radial direction of the rotor core 1, and the second magnetic steel slot 102 is an arc shape with a middle portion protruding toward the center of the rotor core 1, an arc shape with a middle portion protruding in the circumferential direction of the rotor core 1, or a rectangle extending in the radial direction of the rotor core 1.
The adjacent first magnet steel slots 101 and the adjacent second magnet steel slots 102 in each segment of the rotor core 1 are symmetrical with respect to a plane passing through the core portion axis. Of course, the first magnetic steel grooves 101 and the second magnetic steel grooves 102 may be arranged at intervals in the circumferential direction and at even intervals in the circumferential direction.
In addition, with reference to fig. 2, 5, 7, and 9, the present invention also provides a rotor including: rotor core 1, rotor core 1 are aforementioned rotor core 1, and second magnetism steel slot 102 are all filled with permanent-magnet material.
According to the rotor core 1 provided by the embodiment of the invention, the first magnetic steel groove 101 and the second magnetic steel groove 102 can be magnetized, the material cost of the rotor can be greatly reduced, and the demagnetization resistance of the rotor cannot be reduced.
In one embodiment of the present invention, a rubidium-iron-boron permanent magnetic material with a strong coercive force is placed in the first magnetic steel slot 101, and a ferrite permanent magnetic material with a low coercive force is placed in the second magnetic steel slot 102. The demagnetization resistance can be further improved.
Preferably, the first magnetic steel groove 101 is internally magnetized in a tangential and parallel manner, and the second magnetic steel groove 102 is internally magnetized in a radial manner and can also be magnetized in a tangential and parallel manner.
Specifically, when the second magnetic steel groove 102 is rectangular or elongated, radial magnetization may be used, and when the second magnetic steel groove 102 is circular arc-shaped, tangential parallel magnetization may be used. Thereby the material cost of the rotor can be greatly reduced, and the demagnetization resistance of the rotor can not be reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. A rotor core is characterized in that a first magnetic steel groove and a second magnetic steel groove are formed in the rotor core, the first magnetic steel groove and the second magnetic steel groove respectively comprise a plurality of magnetic steel grooves which are arranged along the circumferential direction of the rotor core at intervals, the second magnetic steel groove is formed in the inner side of the first magnetic steel groove, the second magnetic steel groove is opposite to an area between two adjacent first magnetic steel grooves in the radial direction of the rotor core, one end of the second magnetic steel groove is adjacent to one first magnetic steel groove, the other end of the second magnetic steel groove extends towards the center of the rotor core,
the first magnetic steel groove and the second magnetic steel groove which are communicated with each other are separated by a step part and are communicated by a communicating part, and the step part and the communicating part between the first magnetic steel groove and the second magnetic steel groove which are communicated with each other are arranged in a staggered mode in the axial direction of the rotor core.
2. The rotor core according to claim 1, wherein the second magnetic steel slot is a circular arc with a middle portion protruding in the circumferential direction of the rotor core, and the plurality of second magnetic steel slots protrude in the same direction.
3. The rotor core according to claim 1, wherein an end surface of the second magnetic steel slot extends in an axial direction of the rotor core and is opposed to one of the first magnetic steel slots.
4. The rotor core of claim 1 wherein the first magnetic steel slots are rectangular extending in a radial direction of the rotor core.
5. The rotor core according to any one of claims 1-4, wherein the first magnetic steel slot is provided with slits on both sides in the circumferential direction of the rotor core.
6. The rotor core of claim 5 wherein the slits on both sides of the first magnetic steel slot open in a direction away from the center of the rotor core.
7. The rotor core according to claim 6, wherein the outer circumferential surface of the rotor core has a recess that faces the first magnet steel slot, an inner end of the slit is opposite to the recess in a radial direction of the rotor core, and an outer end of the slit is not opposite to the recess in the radial direction of the rotor core.
8. The rotor core according to any one of claims 1-4, wherein an outer circumferential surface of the rotor core is recessed toward the first magnet steel slot.
9. The rotor core of any one of claims 1-4, wherein the first and second magnet steel slots are equal in number.
10. A rotor, comprising:
the rotor core according to any one of claims 1 to 9, wherein the second magnetic steel slot and the second magnetic steel slot are filled with permanent magnetic materials.
11. The rotor of claim 10, wherein the first magnetic steel slot is filled with a neodymium-iron-boron permanent magnetic material with a strong coercive force, and the second magnetic steel slot is filled with a ferrite permanent magnetic material with a low coercive force.
12. The rotor of claim 10, wherein said first magnetic steel slots are magnetized tangentially in parallel and said second magnetic steel slots are magnetized radially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710764394.1A CN107394923B (en) | 2017-08-30 | 2017-08-30 | Rotor core and rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710764394.1A CN107394923B (en) | 2017-08-30 | 2017-08-30 | Rotor core and rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107394923A CN107394923A (en) | 2017-11-24 |
| CN107394923B true CN107394923B (en) | 2020-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710764394.1A Active CN107394923B (en) | 2017-08-30 | 2017-08-30 | Rotor core and rotor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108616174A (en) * | 2018-05-03 | 2018-10-02 | 核心驱动科技（金华）有限公司 | A kind of combination magnet steel |
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| CN106300729A (en) * | 2015-05-29 | 2017-01-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet machine rotor and permagnetic synchronous motor |
| CN106487134A (en) * | 2015-09-02 | 2017-03-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor construction and magneto |
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| CN107394923A (en) | 2017-11-24 |
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