CN111293803B - Rotor punchings, rotors, motors and dies - Google Patents
Rotor punchings, rotors, motors and dies Download PDFInfo
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- CN111293803B CN111293803B CN201811504412.3A CN201811504412A CN111293803B CN 111293803 B CN111293803 B CN 111293803B CN 201811504412 A CN201811504412 A CN 201811504412A CN 111293803 B CN111293803 B CN 111293803B
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- 238000004080 punching Methods 0.000 title claims abstract description 28
- 230000005291 magnetic effect Effects 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 230000005294 ferromagnetic effect Effects 0.000 claims description 15
- 238000003475 lamination Methods 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 14
- 239000010959 steel Substances 0.000 abstract description 14
- 230000010349 pulsation Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000005389 magnetism Effects 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
- 238000010276 construction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
-
- 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)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
本发明提出了一种转子冲片、转子、电机和模具，其中，转子冲片包括：多个槽，每个槽沿转子冲片的径向设置，槽用于安装铁磁体；任意相邻的两个槽之间具有第一夹角，多个第一夹角中，至少一个第一夹角小于其它第一夹角。通过本发明的技术方案，有效地实现了某些次的气隙磁密谐波相互抵消；还实现了以整体磁极偏移达到斜极效果，且转子无需分段；进一步地，本技术方案还能够降低齿槽转矩、转矩脉动、提高电机功率密度，相较于特殊充磁磁钢、分段斜极转子等结构中的转子冲片，本技术方案的转子冲片还具有工艺简单、制造方便，便于批量生产等优点。
The present invention proposes a rotor punching, a rotor, a motor and a mold, wherein the rotor punching includes: a plurality of slots, each slot is arranged along the radial direction of the rotor punching, and the slot is used to install a ferromagnet; there is a first angle between any two adjacent slots, and among the plurality of first angles, at least one first angle is smaller than the other first angles. Through the technical solution of the present invention, certain harmonics of the air gap magnetic density are effectively offset; the overall magnetic pole offset is used to achieve the skewed pole effect, and the rotor does not need to be segmented; further, the technical solution can also reduce the cogging torque, torque pulsation, and improve the power density of the motor. Compared with the rotor punchings in the structures of special magnetized magnetic steel, segmented skewed pole rotor, etc., the rotor punching of the technical solution also has the advantages of simple process, convenient manufacturing, and convenient mass production.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a rotor punching sheet, a rotor, a motor and a die.
Background
Cogging torque and torque ripple are one of the main factors affecting motor vibration noise. The traditional permanent magnet motor rotor usually adopts a sectional oblique pole mode to reduce motor cogging torque and torque pulsation, but the method is difficult to magnetize and assemble, has complex process and is not easy to realize in batches.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
In view of the above, an object of the present invention is to provide a rotor punching sheet.
Another object of the present invention is to provide a rotor.
Another object of the present invention is to provide an electric machine.
Another object of the present invention is to provide a mold.
In order to achieve the above object, the technical scheme of the first aspect of the present invention provides a rotor punching sheet, which comprises a plurality of slots, wherein each slot is arranged along the radial direction of the rotor punching sheet, the slots are used for installing a ferromagnetic body, a first included angle is formed between any two adjacent slots, and at least one first included angle is smaller than other first included angles in the plurality of first included angles.
In the technical scheme, at least one first included angle is set smaller than other first included angles, so that after the ferromagnetic body is mounted on a groove, at least one polar arc is smaller than other polar arcs, the area of a q-axis area corresponding to the smaller polar arc is smaller than that of other q-axis areas, and therefore air gap flux density harmonic waves of certain times are offset, meanwhile, the ferromagnetic body with the structural arrangement can achieve the effect of oblique pole through integral magnetic pole offset, and a rotor does not need to be segmented, further, through the structure of the oblique pole, tooth torque of a motor can be reduced, motor loss is reduced, motor efficiency is further improved, tooth harmonic waves can be reduced, torque pulsation is reduced, motor power density is improved, and accordingly vibration noise of the motor is reduced.
It can be appreciated that the radially disposed slots allow the rotor formed after installation of the ferromagnetic body to be of tangential configuration, with a simple structure and convenient assembly.
In the above technical solution, the number of slots is even.
In the technical scheme, the number of the grooves is set to be even, so that even number of ferromagnets can be conveniently installed, the number of magnetic poles can be guaranteed to be even, the smallest magnets can be used for providing the largest magnetic field, the utilization rate of energy is improved, and the stress balance of the rotor and the stability of the rotor during working can be guaranteed.
In the above technical solution, the plurality of grooves are axisymmetrically distributed.
In the technical scheme, the grooves are axisymmetrically distributed, so that the stress balance of the rotor and the stability of the rotor during working are guaranteed, and the energy utilization rate is improved.
In the above technical solution, the plurality of slots in central symmetry distribution are equally divided into an even number of slot groups, each slot group and the adjacent slot groups are respectively offset in opposite directions by the same preset angle, so that the plurality of slots are in axisymmetry distribution, wherein the plurality of slots in each slot group are continuously arranged along the circumferential direction of the rotor punching sheet.
In the technical scheme, a plurality of slots which are distributed in a central symmetry mode are equally divided into even slot groups, each slot group and the adjacent slot groups are respectively offset by the same angle in opposite directions, so that the axisymmetric structure formed by the slots can effectively reduce cogging torque and torque pulsation, improve motor power density, and is simple in structure and convenient to process.
In any of the above embodiments, the plurality of grooves are arranged along a circumferential direction of the rotor sheet.
In the technical scheme, the grooves are arranged along the circumferential direction of the rotor punching sheet, namely, the radial direction of each groove is continuous, so that the plurality of grooves which are arranged in the radial direction are avoided, the structure can be simplified, and the production efficiency is improved.
A second aspect of the present invention provides a rotor comprising a plurality of rotor sheets according to any of the first aspects, a plurality of ferromagnets each mounted in a slot of one rotor sheet.
In this technical solution, by arranging the rotor punching sheet of any one of the above first aspects in the rotor, the rotor in this technical solution has all the beneficial effects of the above technical solution, which is not described herein again.
In the above-described configuration, the polarities of the magnetic poles adjacent to each other in the circumferential direction of the rotor are the same in the two adjacent ferromagnetic bodies.
In the technical scheme, the polarities of the magnetic poles of the two adjacent ferromagnets on the sides close to each other along the circumferential direction of the rotor are the same, namely the polarities of the adjacent magnetic poles are the same, or the ferromagnets are alternately arranged along the circumferential direction of the rotor, so that cogging torque and torque pulsation are reduced.
In the above technical solution, a plurality of ferromagnets are continuously installed in the same slot group of the rotor punching sheet.
In the technical scheme, a plurality of ferromagnets are continuously installed, so that the stability of the rotor in operation is improved.
In the above technical solution, the plurality of ferromagnets are axisymmetrically distributed.
In the technical scheme, the axisymmetric distribution of the plurality of ferromagnets can fully utilize the magnetism of the ferromagnets, so that the utilization rate of energy is improved, and the stability and the reliability of the rotor in operation can be further improved.
A third aspect of the present invention provides an electric machine comprising a rotor according to any one of the second aspects.
By adopting the rotor of any one of the above second aspects, the motor of the present technical solution has all the beneficial effects of the above technical solution, and will not be described herein.
A fourth aspect of the present invention provides a mold for manufacturing a rotor sheet according to any one of the first aspect, wherein the mold is provided with protrusions corresponding to grooves of the rotor sheet.
In the technical scheme, the die for the rotor punching sheet according to any one of the first aspect is simple in structure and convenient to process.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural view of a rotor sheet according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a slot offset configuration of a rotor sheet according to one embodiment of the present invention;
FIG. 3 is a schematic representation of the back-emf harmonic content of a skewed rotor and symmetric rotor in accordance with one embodiment of the invention;
FIG. 4 is a graph comparing electromagnetic torque waveforms of a skewed pole rotor with a symmetric rotor in one embodiment of the invention.
Wherein, the correspondence between the reference numerals and the component names in fig. 1 to 2 is:
10 rotor punching, 12 slots, 120a first slot, 121a second slot, 122a third slot, 123a fourth slot, 120b fifth slot, 121b sixth slot, 122b seventh slot, 123b eighth slot.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
Some embodiments according to the present invention are described below with reference to fig. 1 to 4.
As shown in fig. 1, a rotor sheet 10 according to an embodiment of the present invention includes a plurality of slots 12, each slot 12 being disposed along a radial direction of the rotor sheet 10, the slots 12 being configured to mount a ferromagnetic body, and any two adjacent slots 12 having a first included angle therebetween, at least one of the plurality of first included angles being smaller than the other first included angles.
In this embodiment, as shown in fig. 1, at least one first included angle is set smaller than other first included angles, that is, a plurality of slots 12 on a rotor punching sheet 10 form a non-centrosymmetric structure, so that after the ferromagnetic body is mounted on the slots 12, at least one polar arc is smaller than other polar arcs, the area of a q-axis area corresponding to the smaller polar arc is smaller than the area of other q-axis areas, and thus, the mutual cancellation of air gap flux density harmonics of certain times is realized.
It will be appreciated that the radially disposed slots 12 provide a tangential configuration to the rotor formed after installation of the ferromagnetic body, and are simple in construction and easy to assemble.
The ferromagnetic body in this embodiment includes at least any one of a magnet and a magnetic steel.
In the above embodiment, the number of grooves 12 is an even number.
In this embodiment, the number of the slots 12 is set to be even, so that even number of ferromagnetic bodies can be conveniently installed, and the number of magnetic poles can be guaranteed to be even, so that the smallest magnet can be utilized to provide the largest magnetic field, the utilization rate of energy is improved, and the stress balance of the rotor and the stability during operation can be guaranteed.
Of course, in some embodiments, it is also possible to set the number of slots 12 to an odd number to meet specific requirements.
In the above embodiment, the plurality of grooves 12 are axisymmetrically distributed.
In this embodiment, the plurality of grooves 12 are axisymmetrically distributed, which is beneficial to ensuring the stress balance of the rotor and the stability during operation, and improving the energy utilization rate.
As shown in fig. 2, in the above embodiment, the plurality of slots 12 distributed in a central symmetry are equally divided into an even number of slot groups, each slot group and the slot groups adjacent thereto are respectively offset in opposite directions by the same preset angle, so that the plurality of slots 12 are distributed in an axial symmetry, wherein the plurality of slots 12 in each slot group are continuously arranged in the circumferential direction of the rotor sheet 10.
In this embodiment, the plurality of slots 12 distributed in a central symmetry manner are equally divided into an even number of slot groups, each slot group and the adjacent slot groups are respectively offset in opposite directions by the same angle, so that the axisymmetric structure formed by the plurality of slots 12 can reduce cogging torque and torque pulsation more effectively, improve motor power density, and has simple structure and convenient processing.
Fig. 2 shows a schematic diagram of the offset of the rotor sheet 10 in the present embodiment. Specifically, as shown in fig. 2, the central symmetrical rotor sheet 10 is based on the central symmetrical rotor sheet 10, four slots 12 are formed on the central symmetrical rotor sheet 10, namely a fifth slot 120b, a sixth slot 121b, a seventh slot 122b and an eighth slot 123b, wherein the fifth slot 120b and the eighth slot 123b are a slot group, the sixth slot 121b and the seventh slot 122b are a slot group, the fifth slot 120b and the eighth slot 123b are offset by an angle d along the anticlockwise direction (as shown by an arrow) so that the fifth slot 120b is offset to the position of the first slot 120a, the eighth slot 123b is offset to the position of the fourth slot 123a, and the sixth slot 121b and the seventh slot 122b are offset by an angle d along the clockwise direction (as shown by an arrow) so that the sixth slot 121b is offset to the position of the second slot 121a, and the seventh slot 122b is offset to the position of the third slot 122a, thereby forming a new axial symmetrical rotor sheet 10 shown in fig. 1.
Of course, the embodiment of the present application is not limited thereto, and the angles of the adjacent two groove groups, which are offset in the opposite directions, are not necessarily identical. For example, the fifth groove 120b and the eighth groove 123b have an offset angle d1 (e.g., 5 °), and the sixth groove 121b and the seventh groove 122b have an offset angle d2 (e.g., 10 °), and the offset structure is still an axisymmetric structure.
Further, for the division of the groove groups, it is also possible that each groove 12 is individually a groove group, and for example, the fifth groove 120b, the sixth groove 121b, the seventh groove 122b, and the eighth groove 123b are each a groove group, wherein the fifth groove 120b is offset in a counterclockwise direction, the sixth groove 121b is offset in a clockwise direction, the seventh groove 122b is offset in a counterclockwise direction, and the eighth groove 123b is offset in a clockwise direction, and an axisymmetric structure can be formed as well.
It should be noted that the plurality of slots 12 in the same slot group are continuously arranged in the circumferential direction of the rotor sheet 10, so that the plurality of slots 12 in each slot group are ensured to be continuous instead of being arranged at intervals, and the structure is simple, and the production is convenient.
In any of the above embodiments, the plurality of slots 12 are arranged along the circumferential direction of the rotor sheet 10.
In this embodiment, the plurality of grooves 12 are arranged in the circumferential direction of the rotor sheet 10, that is, each groove 12 is continuous in the radial direction, and the plurality of grooves 12 arranged in the radial direction are avoided, so that the structure can be simplified and the production efficiency can be improved.
An embodiment of the second aspect of the present invention provides a rotor comprising a plurality of rotor sheets 10 according to any of the embodiments of the first aspect described above, a plurality of ferromagnets, each mounted in one of the slots 12 of one of the rotor sheets 10.
In this embodiment, by providing the rotor sheet 10 of any one of the embodiments in the first aspect in the rotor, the rotor in this embodiment has all the advantages of the embodiments described above, which are not described herein.
In the above embodiment, the polarities of the magnetic poles on the sides close to each other in the circumferential direction of the rotor are the same in the adjacent two ferromagnetic bodies.
In this embodiment, of the two adjacent ferromagnetic bodies, the poles on the side close to each other in the circumferential direction of the rotor have the same polarity, that is, the adjacent poles have the same polarity, or the ferromagnetic bodies are alternately arranged in the circumferential direction of the rotor in polarity, that is, the pole N is adjacent to the pole N, and the pole S is adjacent to the pole S, which is advantageous in reducing cogging torque and torque ripple.
In the above embodiment, a plurality of ferromagnets are mounted in succession in the same slot group of the rotor sheet 10.
In this embodiment, a plurality of ferromagnets are installed in succession, which is advantageous for improving the stability of the rotor operation.
It will be appreciated that a plurality of ferromagnets are also preferably mounted in series throughout the rotor sheet 10, i.e., one ferromagnet is mounted in each slot 12, with no empty slots 12.
Of course, alternatively, the ferromagnets may be installed at intervals, that is, one ferromagnet is installed in every other slot 12 in the plurality of slots 12, or, there is one empty slot 12 in two adjacent ferromagnets, so that the specification and model number of the rotor punching sheet 10 can be reduced while the axisymmetric structure of the plurality of ferromagnets is ensured, the stock is reduced, and the production process is simplified. For example, 2, 4, 6 or 8 ferromagnets may be mounted on the rotor sheet 10 having eight slots 12, so that only eight slots 12 of the rotor sheet 10 need be produced, thereby facilitating mass production.
In the above embodiment, the plurality of ferromagnets are axisymmetrically distributed.
In this embodiment, by axisymmetric distribution of the plurality of ferromagnets, magnetism of the ferromagnets can be fully utilized, utilization rate of energy can be improved, and stability and reliability of rotor operation can be further improved.
An embodiment of a third aspect of the invention provides an electrical machine comprising a rotor according to any of the embodiments of the second aspect.
By adopting the rotor of any one of the embodiments in the second aspect, the motor of the present embodiment has all the advantages of the foregoing embodiments, and will not be described herein.
It is understood that the motor of the present application includes at least any one of an ac permanent magnet synchronous motor and a generator, a dc permanent magnet synchronous motor and a generator, and a permanent magnet synchronous motor and a generator of a dc brushless motor.
An embodiment of the fourth aspect of the present invention provides a mold for manufacturing a rotor sheet 10 including the embodiment of any one of the above first aspects, the mold being provided with protrusions corresponding to the grooves 12 of the rotor sheet 10.
In this embodiment, by adopting the mold for the rotor sheet 10 of any one of the embodiments of the first aspect described above, the structure of the mold is simple, and processing of the rotor sheet 10 is facilitated.
As shown in fig. 1, according to an embodiment of the present invention, the rotor is a tangential structure, the rotor sheet 10 includes an even number of asymmetrically distributed slots 12, the slots 12 are used for placing magnetic steels, the corresponding magnetic steel structure of each magnetic steel slot 12 is completely consistent, each magnetic steel is alternately placed along the circumferential polarity of the rotor, the even number of magnetic steels is equally divided into Z groups (Z is greater than 1), and the number of magnetic steels (h) in each group is necessarily a plurality of continuous magnetic steels along the circumferential direction, as shown in fig. 2, the rotor with the tangential permanent magnet rotor with a central symmetry structure is offset by an angle d along the center line of the magnetic steel, and the offset angle of the magnetic steel of the same group is consistent with the offset direction and is opposite to the offset direction of the magnetic steel of the adjacent group, but the angles are consistent.
By adopting the rotor punching sheet of the specific embodiment, the inclination directions of one half of magnetic poles and the other half of magnetic poles of the rotor are opposite, the areas of q-axis areas corresponding to partial pole arcs are unequal, the mutual cancellation of air gap flux density harmonic waves of certain times can be realized, the permanent magnets arranged in the structure can realize the inclined pole effect by the whole magnetic pole deflection, the rotor does not need to be segmented, and in addition, the application can reduce cogging torque and torque pulsation, improve the power density of a motor and has the advantages of simple process, convenient manufacture and the like compared with the structures such as special magnetizing magnetic steel, segmented inclined pole rotor and the like.
Fig. 3 shows a schematic diagram of counter-potential harmonic content of the skewed rotor and the symmetric rotor in the present embodiment, and fig. 4 shows a waveform comparison diagram of electromagnetic torque of the skewed rotor and the symmetric rotor in the present embodiment.
The technical scheme of the invention is explained in detail by combining the drawings, the mutual cancellation of air gap flux density harmonic waves of certain times is effectively realized through the technical scheme of the invention, meanwhile, the ferromagnet with the structural arrangement can realize the effect of realizing oblique pole by the whole magnetic pole deflection, the rotor does not need to be segmented, further, the technical scheme can also reduce cogging torque and torque pulsation, improve the power density of a motor, and meanwhile, compared with rotor punching sheets in structures such as special magnetizing magnetic steel, segmented oblique pole rotors and the like, the rotor punching sheet of the technical scheme has the advantages of simple process, convenient manufacture, convenience for mass production and the like.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, the term "plurality" then referring to two or more unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, as they are used in a fixed or removable connection, or as they are integral with one another, as they are directly or indirectly connected through intervening media. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, 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 present invention. In this specification, schematic representations of the above terms do not necessarily 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.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A rotor punching sheet, comprising:
A plurality of slots, each of the slots being disposed along a radial direction of the rotor sheet, the slots for mounting a ferromagnetic body;
a first included angle is formed between any two adjacent grooves, and at least one first included angle is smaller than the other first included angles in a plurality of first included angles;
The plurality of slots which are distributed in a central symmetry way are evenly divided into even slot groups, each slot group and the adjacent slot groups are respectively offset in opposite directions by the same preset angle, so that the plurality of slots are distributed in an axial symmetry way,
Wherein a plurality of the slots in each of the slot groups are arranged continuously in the circumferential direction of the rotor sheet, and a plurality of the slots in each of the slot groups are continuous.
2. The rotor punching of claim 1, wherein the rotor is,
The number of slots is even.
3. The rotor punching sheet according to claim 1 or 2, characterized in that,
A plurality of the slots are arranged along a circumferential direction of the rotor sheet.
4. A rotor, comprising:
a plurality of rotor laminations as set forth in any one of claims 1-3;
a plurality of ferromagnets, each mounted in one of the slots of one of the rotor laminations.
5. The rotor as set forth in claim 4, wherein,
In the adjacent two ferromagnetic bodies, the polarities of the magnetic poles adjacent to each other in the circumferential direction of the rotor are the same.
6. The rotor as set forth in claim 4, wherein,
And in the same groove group of the rotor punching sheet, a plurality of ferromagnets are continuously installed.
7. The rotor as set forth in claim 4, wherein,
The plurality of ferromagnets are axisymmetrically distributed.
8. An electric machine, comprising:
the rotor of any one of claims 4-7.
9. A mould for manufacturing a rotor punching sheet according to any one of claims 1-3, characterized in that the mould is provided with protrusions corresponding to the grooves of the rotor punching sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811504412.3A CN111293803B (en) | 2018-12-10 | 2018-12-10 | Rotor punchings, rotors, motors and dies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811504412.3A CN111293803B (en) | 2018-12-10 | 2018-12-10 | Rotor punchings, rotors, motors and dies |
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| Publication Number | Publication Date |
|---|---|
| CN111293803A CN111293803A (en) | 2020-06-16 |
| CN111293803B true CN111293803B (en) | 2025-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811504412.3A Active CN111293803B (en) | 2018-12-10 | 2018-12-10 | Rotor punchings, rotors, motors and dies |
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| CN114337016B (en) * | 2021-01-29 | 2024-01-09 | 华为数字能源技术有限公司 | A motor rotor, motor and mobile platform |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864316A (en) * | 2003-08-02 | 2006-11-15 | 猪木宽至 | Rotating electric machine |
| CN208986699U (en) * | 2018-12-10 | 2019-06-14 | 广东威灵汽车部件有限公司 | Rotor punching, rotor, motor and mold |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916512B (en) * | 2012-10-31 | 2014-11-12 | 大洋电机新动力科技有限公司 | Oblique pole rotor structure of permanent magnet synchronous motor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864316A (en) * | 2003-08-02 | 2006-11-15 | 猪木宽至 | Rotating electric machine |
| CN208986699U (en) * | 2018-12-10 | 2019-06-14 | 广东威灵汽车部件有限公司 | Rotor punching, rotor, motor and mold |
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| CN111293803A (en) | 2020-06-16 |
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