CN114123568A - Rotor punching sheet, motor rotor and motor - Google Patents
Rotor punching sheet, motor rotor and motor Download PDFInfo
- Publication number
- CN114123568A CN114123568A CN202010905368.8A CN202010905368A CN114123568A CN 114123568 A CN114123568 A CN 114123568A CN 202010905368 A CN202010905368 A CN 202010905368A CN 114123568 A CN114123568 A CN 114123568A
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- center
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- 238000004080 punching Methods 0.000 title claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052742 iron Inorganic materials 0.000 abstract description 8
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000010349 pulsation Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000009966 trimming Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Images
Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
-
- 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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a rotor punching sheet, a motor rotor and a motor, wherein the rotor punching sheet is provided with a center, the rotor punching sheet comprises six structure groups which are uniformly arranged around the circumference of the center and are sequentially connected, each structure group comprises two magnet slots and a magnetic bundle arrangement structure, and each structure group is also provided with a first reference line which is arranged along the radial direction of the rotor punching sheet; the two magnet slots are symmetrically arranged and communicated with each other relative to the first reference line; the angle between the extending directions of the two magnet slots ranges from 145 degrees to 155 degrees, and the corner formed by the two magnet slots points to the center; the magnetic beam arrangement structure is arranged on the outer side of the magnet groove and is arranged at intervals with the magnet groove. The motor rotor can have better magnetic line distribution, thereby solving the problem that the comprehensive indexes of the motor back electromotive force, the motor efficiency, the rotor iron loss and the torque pulsation of the motor in the prior art are not ideal.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a rotor punching sheet, a motor rotor and a motor.
Background
The evaluation indexes of the motor comprise motor back electromotive force, motor efficiency, rotor iron loss, torque ripple and the like. Due to the current motor design, only a single index is usually focused on or a plurality of indexes are focused on, but sufficient optimization is not performed, so that the current motor has the problem that the comprehensive indexes of motor back electromotive force, motor efficiency, rotor iron loss and torque ripple are not ideal enough.
Disclosure of Invention
The invention aims to provide a rotor punching sheet, a motor rotor and a motor, and aims to solve the problem that comprehensive indexes of motor back electromotive force, motor efficiency, rotor iron loss and torque pulsation of the motor in the prior art are not ideal.
In order to solve the technical problem, according to a first aspect of the present invention, a rotor punching is provided, which is used for a permanent magnet motor of a compressor, and has a center, the rotor punching includes six structure groups that are uniformly arranged around the center in a circumferential direction and are sequentially connected, each structure group includes two magnet slots and a magnetic bundle arrangement structure, and each structure group further has a first reference line that is arranged along a radial direction of the rotor punching; the two magnet slots are symmetrically arranged and communicated with each other relative to the first reference line;
the angle between the extending directions of the two magnet slots ranges from 145 degrees to 155 degrees, and the corner formed by the two magnet slots points to the center;
the magnetic beam arrangement structure is arranged on the outer side of the magnet groove and is arranged at intervals with the magnet groove.
Optionally, the magnetic beam arrangement structure includes at least two magnetic beam arrangement grooves, and the at least two magnetic beam arrangement grooves are symmetrical with respect to the first reference line.
Optionally, each outer side of the structure group includes two cut edges and an arc edge, the arc edge surrounds the central circumferential extension, two cut edges are respectively disposed on two sides of the arc edge, the cut edges are collinear and connected with adjacent cut edges in the adjacent structure group, and two perpendicular lines of the cut edges connected pass through the center.
Optionally, in the six structure groups, the ratio of the distance between the two cutting edges symmetrical about the center to the distance between the two arc edges symmetrical about the center ranges from 0.95 to 0.99.
Optionally, each of the structure groups further includes two magnetic bridge grooves, and the two magnetic bridge grooves are symmetrically disposed on one ends of the two magnet grooves, which are far away from the first reference line, with respect to the first reference line, and are respectively communicated with the corresponding magnet grooves; the extending direction of the magnetic bridge slot is parallel to the adjacent cutting edge.
Optionally, the width of the magnetic bridge slot perpendicular to the extending direction ranges from 0.6mm to 0.8 mm.
Optionally, the magnetic bridge slot extends no more than the adjacent pole arc away from the end connected with the magnet slot.
Optionally, the distance between two adjacent magnetic bridge slots in two adjacent structure groups ranges from 0.8mm to 1.0 mm.
In order to solve the technical problem, according to a second aspect of the present invention, a motor rotor is provided, which includes a rotor core, and the rotor core is formed by laminating at least two pieces of the above rotor sheets.
In order to solve the above technical problem, according to a third aspect of the present invention, there is provided a motor including the above motor rotor.
Compared with the prior art, in the rotor punching sheet, the motor rotor and the motor provided by the invention, the rotor punching sheet is provided with a center, the rotor punching sheet comprises six structure groups which are uniformly arranged around the center in the circumferential direction and are sequentially connected, each structure group comprises two magnet slots and a magnetic bundle arrangement structure, and each structure group is also provided with a first reference line which is arranged along the radial direction of the rotor punching sheet; the two magnet slots are symmetrically arranged and communicated with each other relative to the first reference line; the angle between the extending directions of the two magnet slots is in the range of 145-155 degrees, and the corner formed by the two magnet slots points to the center; the magnetic beam arrangement structure is arranged on the outer side of the magnet groove and is arranged at intervals with the magnet groove. The motor rotor can have better magnetic line distribution, thereby solving the problem that the comprehensive indexes of the motor back electromotive force, the motor efficiency, the rotor iron loss and the torque pulsation of the motor in the prior art are not ideal.
Drawings
It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the invention and do not constitute any limitation to the scope of the invention. Wherein:
FIG. 1 is a schematic view of a rotor sheet in an embodiment of the present invention, showing an angle formed by two magnet slots;
FIG. 2 is a schematic view of a rotor sheet in an embodiment of the present invention, wherein the distance between the cut edge and the circular arc edge is shown;
fig. 3 is a schematic view of a rotor sheet in an embodiment of the present invention, in which the dimensions of the magnetic bridge slots are shown.
In the drawings:
1-center; 2-structural group; 3-a first reference line; 4-polar arc;
21-a magnet slot; 22-magnetic beam arrangement structure; 23-trimming; 24-arc edge; 25-magnetic beam arrangement groove; 26-magnetic bridge slot; 27-a first magnetic isolation bridge; 28-second magnetic isolation bridge.
Detailed Description
To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings are designed in a very simplified form and are not to scale, but are for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
As used in this application, the singular forms "a," "an," and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a," "an," and "the" are generally employed in a sense including "at least one," the terms "at least two" are generally employed in a sense including "two or more," and the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "proximal end" and "distal end" generally refer to the corresponding two parts, which include not only the end points, but the terms "mounted", "connected" and "connected" should be understood broadly, e.g., as a fixed connection, as a detachable connection, or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Furthermore, as used in the present invention, the disposition of an element with another element generally only means that there is a connection, coupling, fit or driving relationship between the two elements, and the connection, coupling, fit or driving relationship between the two elements may be direct or indirect through intermediate elements, and cannot be understood as indicating or implying a spatial positional relationship between the two elements, i.e., an element may be in any position, such as the inside, outside, above, below or one side of another element, unless the content clearly indicates otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
The core idea of the invention is to provide a rotor punching sheet, a motor rotor and a motor, so as to solve the problem that the comprehensive indexes of motor back electromotive force, motor efficiency, rotor iron loss and torque ripple of the motor in the prior art are not ideal.
The following description refers to the accompanying drawings.
Referring to fig. 1 to 3, fig. 1 is a schematic view of a rotor sheet according to an embodiment of the present invention, wherein an angle formed by two magnet slots is shown; FIG. 2 is a schematic view of a rotor sheet in an embodiment of the present invention, wherein the distance between the cut edge and the circular arc edge is shown; fig. 3 is a schematic view of a rotor sheet in an embodiment of the present invention, in which the dimensions of the magnetic bridge slots are shown.
The embodiment provides a rotor punching sheet for a permanent magnet motor of a compressor, and referring to fig. 1, the rotor punching sheet has a center 1, the rotor punching sheet includes six structure groups 2 which are uniformly arranged around the center in the circumferential direction and are sequentially connected, each structure group 2 includes two magnet slots 21 and a magnetic bundle arrangement structure 22, and each structure group 2 further has a first reference line 3 which is arranged along the radial direction of the rotor punching sheet; the two magnet slots 21 are symmetrically arranged and communicated with each other about the first reference line 3; the angle between the extending directions of the two magnet slots 21 ranges from 145 degrees to 155 degrees, and the angle formed by the two magnet slots 21 points to the center; the magnetic beam arrangement structure 22 is disposed outside the magnet slot 21 and spaced apart from the magnet slot 21. Optionally, the rotor sheet is made of a silicon steel sheet and other materials with high magnetic permeability. In practice, permanent magnets (e.g., magnets) may be embedded in the magnet slots 21 in the desired polarity directions, and those skilled in the art can understand the arrangement principle of the magnet slots according to the prior art.
It should be understood that the angle formed by the two magnet slots 21 is shown as θ in fig. 1, and the outside of the magnet slot 21 refers to the side of the magnet slot 21 away from the center 1 and is also the inside of the angle θ.
In one embodiment, the inventor selects a plurality of values of θ for a rotor, and the experimental results are shown in table 1, and it can be seen from the experimental results that the back electromotive force of the motor increases step by step with the change of the angle, and the performance of the motor increases step by step. Meanwhile, when the angle is larger than 155 degrees, the harmonic content of the back electromotive force is greatly increased, and the electromagnetic noise generated during the operation of the motor has a larger negative effect, so that the operation stability of the motor is influenced.
Table 1: experimental results of different theta for one rotor
| Angle value | 143° | 145° | 150° | 155° | 156° |
| Back electromotive force | 51.2 | 52.13 | 52.46 | 52.51 | 52.63 |
| 5 th harmonic content | 5.20％ | 2.70％ | 2.40％ | 3.00％ | 8.40％ |
| Content of 7 th harmonic | 6.90％ | 2.20％ | 1.80％ | 2.10％ | 10.5％ |
Through the above experiments, the following conclusions can be drawn: in view of both performance and noise, the value range of the theta angle is set to 145-155 degrees, which has a good comprehensive effect.
Furthermore, because the difference between the magnetic conductivity of the air and the magnetic conductivity of the main material of the rotor punching sheet is large, some magnetic beam arrangement structures are arranged at proper positions, and improvement of magnetic induction line distribution is facilitated. The inventors have found that by providing the magnetic flux collecting structure 22 outside the magnet slot 21, the original magnetic induction line distribution can be changed, and the motor efficiency can be improved.
Referring to fig. 2, preferably, the magnetic beam arrangement structure 22 includes at least two magnetic beam arrangement grooves 25, and at least two magnetic beam arrangement grooves 25 are symmetrical with respect to the first reference line 3. It should be understood that the main function of the magnetic beam arranging groove 25 is to ensure the overall mechanical strength of the rotor sheet while arranging the magnetic beam, so the requirements on the position and the size are not strict, and the requirement symmetry is only considered from the viewpoint of processing. For example, the magnetic beam arranging grooves 25 may be distributed asymmetrically, and the magnetic beam arranging grooves 25 may not use the same size parameters, and as long as the structure can arrange the magnetic induction lines without damaging the mechanical strength of the punching sheet, the structure should be considered as the protection scope of the claims. Fig. 2 shows a preferred example, in which the magnetic beam arrangement structure 22 includes four magnetic beam arrangement grooves 25 symmetrically distributed on both sides of the first reference line 3 in groups of two.
Referring to fig. 2, preferably, the outer side of each structure group 2 includes two cut edges 23 and a circular arc edge 24, the circular arc edge 24 extends circumferentially around the center 1, the two cut edges 23 are respectively disposed at two sides of the circular arc edge 24, the cut edges 23 are collinear and connected with the adjacent cut edges 23 in the adjacent structure group 2, and a perpendicular line of the connected two cut edges 23 passes through the center 1.
It should be understood that the description of "cut edge" and "circular arc edge" is not a precise mathematical concept, and the structures that approximate the shapes of "cut edge" and "circular arc edge" but do not affect the overall function of the side edges due to processing errors or some small modification on the side edges should be considered as the category of the concepts of "cut edge" and "circular arc edge". The term "collinear" is not to be interpreted narrowly as meaning a straight line, but is to be interpreted broadly as meaning an angle between 0 ° and 5 °, and similarly, the term "perpendicular line passing through the center 1" is to be interpreted broadly as meaning that one of straight lines between 85 ° and 95 ° from the tangent 23 passes through the center 1. Through the arrangement of the trimming 23, the cogging torque of the motor can be reduced, and the no-load stress and the torque pulsation of the motor are reduced.
In a specific embodiment, in six of the structure groups 2, the ratio of the distance between the two cut edges 23 symmetrical about the center 1 to the distance between the two circular arc edges 24 symmetrical about the center 1 is in the range of 0.95-0.99. Referring to fig. 2, the distance between the two cut edges 23 symmetrical about the center 1 is shown by D1 in fig. 2, the distance between the two arc edges 24 symmetrical about the center 1 is shown by D2 in fig. 2, and the value of D1/D2 should be between 0.95 and 0.99. It will be appreciated that, since the six structural groups 2 are evenly distributed around the centre, all the circular arc edges 24 coincide on the same circumference around said centre, D2 being the diameter of the circumference. The position of the trimming 23 and other structural dimensions in the structural group 2 have a constraint relationship, and the configuration can not only realize beneficial effects, but also leave enough space for the design of other structural dimensions, thereby facilitating the realization of further optimization of comprehensive indexes.
Referring to fig. 3, preferably, each of the structure groups 2 further includes two magnetic bridge grooves 26, and the two magnetic bridge grooves 26 are symmetrically disposed on one ends of the two magnetic slots 21 away from the first reference line 3 with respect to the first reference line 3 and are respectively communicated with the corresponding magnetic slots 21; the magnetic bridge grooves 26 extend in parallel with the adjacent cutting edges 23.
It should be understood that "parallel" should be broadly understood as meaning that the direction of extension of the magnetic bridge grooves 26 makes an angle of 0 ° to 5 ° with the adjacent cutting edges 23. Through the setting of magnetic bridge groove 26, make cut 23 around form first magnetic bridge 27 and the second magnetic bridge 28 that separates, solved the too big problem that leads to the low-down utilization ratio of permanent magnet of magnetic leakage coefficient of permanent magnet.
Referring to fig. 3, in an embodiment, a width of the magnetic bridge slot 26 perpendicular to the extending direction ranges from 0.6mm to 0.8mm, an extending length of the magnetic bridge slot 26 away from an end connected to the magnet slot 21 does not exceed an adjacent pole arc 4, and a distance between two adjacent magnetic bridge slots 26 in two adjacent structure groups 2 ranges from 0.8mm to 1.0 mm.
It should be understood that the width of the magnetic bridge slots 26 perpendicular to the extending direction is shown by D3 in fig. 3, and the distance between two adjacent magnetic bridge slots 26 in two adjacent structure groups 2 is shown by D4 in fig. 3, i.e. D3 ranges from 0.6mm to 0.8mm, and D3 ranges from 0.8mm to 1.0 mm. The pole arc line 4 can be determined according to the pole number of the motor, the pole arc angles are different under different pole numbers, under a specific pole number, the pole arc angle can be determined according to the optimal performance of the rotor slot shape, and the specific method for determining the pole arc line is common knowledge in the field and is not described in detail herein. In the present embodiment, the above three limitations are implemented together, so that the magnetic isolation effect is better, and other embodiments may implement only one or two of the above three limitations, and may also have partial beneficial effects, which should be regarded as the protection scope of the claims.
The embodiment also provides a motor rotor, which comprises a rotor core, wherein the rotor core is formed by laminating at least two rotor punching sheets. The embodiment also provides a motor, which comprises the motor rotor. Because the electronic rotor and the motor both comprise the rotor punching sheet, the electronic rotor and the motor both have the beneficial effect that the comprehensive indexes of the motor counter potential, the motor efficiency, the rotor iron loss and the torque ripple are better, and a person skilled in the art can set other parts and structures of the motor rotor and other parts and structures of the motor through the prior art, and detailed description is not provided herein.
In summary, in the rotor sheet, the motor rotor and the motor provided in this embodiment, the rotor sheet has a center, the rotor sheet includes six structure groups that are uniformly arranged around the center in a circumferential direction and are sequentially connected, each structure group includes two magnet slots and a magnetic bundle arrangement structure, and each structure group further has a first reference line that is arranged along a radial direction of the rotor sheet; the two magnet slots are symmetrically arranged and communicated with each other relative to the first reference line; the angle between the extending directions of the two magnet slots ranges from 145 degrees to 155 degrees, and the corner formed by the two magnet slots points to the center; the magnetic beam arrangement structure is arranged on the outer side of the magnet groove and is arranged at intervals with the magnet groove. The motor rotor can have better magnetic line distribution, thereby solving the problem that the comprehensive indexes of the motor back electromotive force, the motor efficiency, the rotor iron loss and the torque pulsation of the motor in the prior art are not ideal.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. The rotor punching sheet is used for a permanent magnet motor of a compressor and is characterized in that the rotor punching sheet is provided with a center, the rotor punching sheet comprises six structure groups which are uniformly arranged around the circumference of the center and are sequentially connected, each structure group comprises two magnet slots and a magnetic bundle arrangement structure, and each structure group is also provided with a first reference line which is arranged along the radial direction of the rotor punching sheet; the two magnet slots are symmetrically arranged and communicated with each other relative to the first reference line;
the angle between the extending directions of the two magnet slots ranges from 145 degrees to 155 degrees, and the corner formed by the two magnet slots points to the center;
the magnetic beam arrangement structure is arranged on the outer side of the magnet groove and is arranged at intervals with the magnet groove.
2. The rotor sheet according to claim 1, wherein the magnetic beam arrangement structure comprises at least two magnetic beam arrangement grooves, and the at least two magnetic beam arrangement grooves are symmetrical with respect to the first reference line.
3. The rotor sheet according to claim 1, wherein the outer side edge of each of the structure groups includes two cut edges and one circular arc edge, the circular arc edge extends circumferentially around the center, the two cut edges are respectively disposed at two sides of the circular arc edge, the cut edges are collinear and connected with the adjacent cut edges in the adjacent structure group, and a perpendicular line of the two connected cut edges passes through the center.
4. The rotor sheet according to claim 3, wherein in six of the structural groups, the ratio of the distance between the two cut edges symmetrical about the center to the distance between the two arc edges symmetrical about the center ranges from 0.95 to 0.99.
5. The rotor sheet according to claim 3, wherein each of the structure groups further includes two magnetic bridge grooves, and the two magnetic bridge grooves are symmetrically disposed about the first reference line at one ends of the two magnet grooves far away from the first reference line and are respectively communicated with the corresponding magnet grooves; the extending direction of the magnetic bridge slot is parallel to the adjacent cutting edge.
6. The rotor sheet according to claim 5, wherein the width of the magnetic bridge groove perpendicular to the extending direction ranges from 0.6mm to 0.8 mm.
7. The rotor sheet as recited in claim 5, wherein the end of the magnetic bridge slot away from the end connected to the magnet slot extends no more than an adjacent pole arc.
8. The rotor sheet according to claim 5, wherein the distance between two adjacent magnetic bridge grooves in two adjacent structure groups ranges from 0.8mm to 1.0 mm.
9. A motor rotor is characterized by comprising a rotor core, wherein the rotor core is formed by laminating at least two rotor sheets according to any one of claims 1-8.
10. An electric machine comprising an electric machine rotor according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010905368.8A CN114123568A (en) | 2020-09-01 | 2020-09-01 | Rotor punching sheet, motor rotor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010905368.8A CN114123568A (en) | 2020-09-01 | 2020-09-01 | Rotor punching sheet, motor rotor and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114123568A true CN114123568A (en) | 2022-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010905368.8A Pending CN114123568A (en) | 2020-09-01 | 2020-09-01 | Rotor punching sheet, motor rotor and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114123568A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012254019A (en) * | 2012-09-25 | 2012-12-20 | Mitsubishi Electric Corp | Electric motor, blower, and compressor |
| CN205141856U (en) * | 2015-11-18 | 2016-04-06 | 广东美芝制冷设备有限公司 | Rotor assembly and motor possessing same |
| CN210577992U (en) * | 2019-09-19 | 2020-05-19 | 上海海立电器有限公司 | Rotor punching sheet, motor and compressor |
| CN212518569U (en) * | 2020-09-01 | 2021-02-09 | 上海海立电器有限公司 | Rotor punching sheet, motor rotor and motor |
-
2020
- 2020-09-01 CN CN202010905368.8A patent/CN114123568A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012254019A (en) * | 2012-09-25 | 2012-12-20 | Mitsubishi Electric Corp | Electric motor, blower, and compressor |
| CN205141856U (en) * | 2015-11-18 | 2016-04-06 | 广东美芝制冷设备有限公司 | Rotor assembly and motor possessing same |
| CN210577992U (en) * | 2019-09-19 | 2020-05-19 | 上海海立电器有限公司 | Rotor punching sheet, motor and compressor |
| CN212518569U (en) * | 2020-09-01 | 2021-02-09 | 上海海立电器有限公司 | Rotor punching sheet, motor rotor and motor |
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