CN111293803A - Rotor punching sheet, rotor, motor and die - Google Patents
Rotor punching sheet, rotor, motor and die Download PDFInfo
- Publication number
- CN111293803A CN111293803A CN201811504412.3A CN201811504412A CN111293803A CN 111293803 A CN111293803 A CN 111293803A CN 201811504412 A CN201811504412 A CN 201811504412A CN 111293803 A CN111293803 A CN 111293803A
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- rotor
- punching sheet
- sheet
- ferromagnets
- rotor punching
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- 238000004080 punching Methods 0.000 title claims abstract description 29
- 230000005291 magnetic effect Effects 0.000 claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000003475 lamination Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 16
- 239000010959 steel Substances 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000004907 flux Effects 0.000 abstract description 5
- 238000010923 batch production Methods 0.000 abstract description 4
- 230000005294 ferromagnetic effect Effects 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010586 diagram 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
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
Images
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—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention provides a rotor punching sheet, a rotor, a motor and a die, wherein the rotor punching sheet comprises: the rotor punching sheet comprises a plurality of slots, a plurality of connecting rods and a plurality of connecting rods, wherein each slot is arranged along the radial direction of the rotor punching sheet and is used for installing ferromagnets; a first included angle is formed between any two adjacent grooves, and at least one first included angle is smaller than other first included angles in the plurality of first included angles. Through the technical scheme of the invention, the mutual cancellation of air gap flux density harmonic waves of certain times is effectively realized; the effect of oblique poles is achieved by integral magnetic pole deviation, and the rotor does not need to be segmented; furthermore, the technical scheme can also reduce the cogging torque and the torque ripple and improve the power density of the motor, and compared with the rotor punching sheet in the structures such as special magnetizing magnetic steel and a segmented skewed-pole rotor, the rotor punching sheet of the technical scheme also has the advantages of simple process, convenience in manufacturing, convenience in batch production and the like.
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 the vibration noise of the motor. The traditional permanent magnet motor rotor usually adopts a segmented skewed pole mode to reduce the cogging torque and the torque ripple of the motor, but the method has the disadvantages of difficult magnetizing and assembling, complex process and difficult realization of product batch.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
In view of the above, an object of the present invention is to provide a rotor sheet.
It is another object of the present invention to provide a rotor.
It is another object of the present invention to provide an electric machine.
Another object of the present invention is to provide a mold.
In order to achieve the above object, a technical solution of a first aspect of the present invention provides a rotor sheet, including: the rotor punching sheet comprises a plurality of slots, a plurality of connecting rods and a plurality of connecting rods, wherein each slot is arranged along the radial direction of the rotor punching sheet and is used for installing ferromagnets; a first included angle is formed between any two adjacent grooves, 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 to be smaller than other first included angles, so that after the ferromagnetic body is installed on the slot, at least one polar arc is smaller than other polar arcs, the area of a q-axis region corresponding to the smaller polar arc is smaller than the area of other q-axis regions, and further, the mutual cancellation of air gap flux density harmonics of certain times is realized; meanwhile, the ferromagnet arranged in the structure can achieve the effect of oblique poles by integral magnetic pole offset, and the rotor does not need to be segmented; furthermore, the technical scheme can reduce the cogging torque of the motor and the loss of the motor through the structure of the oblique pole, thereby improving the efficiency of the motor; the gear harmonic wave can be reduced, the torque pulsation is reduced, and the power density of the motor is improved, so that the vibration noise of the motor is reduced; meanwhile, compared with rotor punching sheets in structures such as special magnetizing magnetic steel and segmented skewed pole rotors, the rotor punching sheet has the advantages of simple process, convenience in manufacturing, convenience for batch production and the like.
As can be understood, the radially arranged slots enable the rotor formed after the ferromagnets are installed to be in a tangential structure, the structure is simple, and the assembly is convenient.
In the above technical solution, the number of slots is an even number.
In the technical scheme, the number of the slots is set to be even, so that the even number of ferromagnets are convenient to mount, the number of the magnetic poles can be ensured to be even, the minimum magnet can be utilized to provide the maximum magnetic field, the utilization rate of energy is improved, and the stress balance of the rotor and the stability during working can be ensured.
In the above technical solution, the plurality of grooves are axisymmetrically distributed.
In this technical scheme, a plurality of grooves are the axisymmetric distribution, are favorable to guaranteeing the balanced and stability of during operation of atress of rotor on the one hand, promote energy utilization.
In the above technical solution, the plurality of slots distributed in a centrosymmetric manner are equally divided into an even number of slot groups, and each slot group and the slot group adjacent thereto are respectively offset by the same preset angle in opposite directions, so that the plurality of slots are distributed in an axisymmetric manner, wherein the plurality of slots in each slot group are continuously arranged in the circumferential direction of the rotor sheet.
In the technical scheme, a plurality of grooves which are distributed in central symmetry are equally divided into an even number of groove groups, each groove group and the adjacent groove group deviate the same angle in opposite directions, and the axial symmetry structure formed by the grooves can effectively reduce the cogging torque and the torque pulsation, improve the power density of the motor, and has simple structure and convenient processing.
In any one of the above technical solutions, the plurality of slots are arranged along the circumferential direction of the rotor sheet.
In the technical scheme, the plurality of grooves are arranged along the circumferential direction of the rotor punching sheet, namely the radial direction of each groove is continuous, the plurality of grooves arranged in the radial direction are avoided, the structure can be simplified, and the production efficiency is improved.
The technical scheme of the second aspect of the invention provides a rotor, which comprises a plurality of rotor sheets in any one technical scheme of the first aspect; a plurality of ferromagnets, each ferromagnet mounted in a slot of one of the rotor laminations.
In this technical scheme, the rotor sheet according to any one of the first aspect is provided in the rotor, so that the rotor in this technical scheme has all the beneficial effects of the above technical scheme, and details are not repeated herein.
In the above technical solution, in two adjacent ferromagnets, the polarities of the magnetic poles that are close to each other in the circumferential direction of the rotor are the same.
In the technical scheme, the magnetic poles on the sides close to each other along the circumferential direction of the rotor in the two adjacent ferromagnets have the same polarity, that is, the adjacent magnetic poles have the same polarity, or the ferromagnets are alternately arranged along the circumferential direction of the rotor, so that the cogging torque and the torque ripple are favorably reduced.
In the technical scheme, a plurality of ferromagnets are continuously installed in the same slot group of the rotor punching sheet.
In the technical scheme, the plurality of ferromagnets are continuously installed, so that the working stability of the rotor is improved.
In the technical scheme, the plurality of ferromagnets are distributed in an axisymmetric manner.
In the technical scheme, the axial symmetry distribution of the ferromagnets can make full use of the magnetism of the ferromagnets, improve the utilization rate of energy, and further improve the working stability and reliability of the rotor.
A third aspect of the present invention provides a motor, including: the rotor according to any one of the above second aspects.
By adopting the rotor according to any one of the above second aspects, the motor according to the present technical solution has all the beneficial effects of the above technical solutions, and details are not repeated here.
The technical scheme of the fourth aspect of the invention provides a die for manufacturing the rotor sheet including any one of the technical schemes of the first aspect, wherein the die is provided with protrusions corresponding to the grooves of the rotor sheet.
In this technical scheme, to the mould of the rotor punching of any one of above-mentioned first aspect, simple structure, processing is convenient.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural view of a rotor sheet according to an embodiment of the present invention;
FIG. 2 is a schematic view of a slot offset structure of a rotor lamination according to an embodiment of the present invention;
FIG. 3 is a schematic representation of counter potential harmonic content of a skewed pole rotor and a symmetric rotor according to an embodiment of the present invention;
FIG. 4 is a graph comparing electromagnetic torque waveforms of a skewed pole rotor and a symmetric rotor according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 2 is:
10 rotor sheets, 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
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Some embodiments according to the invention are described below with reference to fig. 1 to 4.
As shown in fig. 1, a rotor punching sheet 10 according to an embodiment of the present invention includes: a plurality of slots 12, each slot 12 being arranged along a radial direction of the rotor sheet 10, the slots 12 being used for mounting a ferromagnetic body; a first included angle is formed between any two adjacent grooves 12, and at least one of the first included angles is smaller than the other first included angles.
As shown in fig. 1, in this embodiment, at least one first included angle is set to be smaller than other first included angles, that is, a plurality of slots 12 on the rotor sheet 10 form a non-centrosymmetric structure, so that after the ferromagnetic body is installed on the slots 12, at least one pole arc is smaller than other pole arcs, the area of the q-axis region corresponding to the smaller pole arc is smaller than the area of other q-axis regions, and further, some times of air gap flux density harmonics are cancelled out; meanwhile, the ferromagnet arranged in the structure can achieve the effect of oblique poles by integral magnetic pole deviation, so that the cogging torque of the motor is reduced, the loss of the motor is reduced, and the efficiency of the motor is improved; and the rotor does not need to be segmented; furthermore, the embodiment can also reduce the tooth harmonic, reduce the torque ripple and improve the power density of the motor, thereby reducing the vibration noise of the motor; meanwhile, compared with the rotor punching sheet 10 in the structures of special magnetizing magnetic steel, a segmented skewed-pole rotor and the like, the rotor punching sheet 10 in the embodiment has the advantages of simple process, convenience in manufacturing, convenience for batch production and the like.
It will be appreciated that the radially disposed slots 12 provide a tangential configuration of the rotor formed after the assembly of the ferromagnetic bodies, which is simple and easy to assemble.
The ferromagnetic body in this embodiment includes at least one of a magnet and magnetic steel.
In the above embodiment, the number of the grooves 12 is an even number.
In this embodiment, the number of the slots 12 is set to be even, which is convenient for installing even number of ferromagnets, and can ensure that the number of the magnetic poles is also even, so that the smallest magnet 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 during operation can be ensured.
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 distributed axisymmetrically.
In this embodiment, the slots 12 are distributed in an axisymmetric manner, 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 centrosymmetrically distributed slots 12 are equally divided into an even number of slot groups, and each slot group and the slot group adjacent to the slot group are respectively offset by the same preset angle in opposite directions, so that the plurality of slots 12 are axially symmetrically distributed, wherein the plurality of slots 12 in each slot group are continuously arranged along the circumferential direction of the rotor sheet 10.
In this embodiment, the plurality of slots 12 distributed in the central symmetry are equally divided into an even number of slot groups, and each slot group and the slot group adjacent to the slot group are respectively offset by the same angle in opposite directions, so that the axisymmetric structure formed by the plurality of slots 12 can more effectively reduce the cogging torque and the torque ripple, improve the power density of the motor, and has a simple structure and convenient processing.
Fig. 2 shows an offset diagram of the rotor lamination 10 in the present embodiment. Specifically, as shown in fig. 2, based on the centrally symmetric rotor sheet 10, four cross-shaped grooves 12 are formed in the centrally symmetric rotor sheet 10, which are respectively a fifth groove 120b, a sixth groove 121b, a seventh groove 122b, and an eighth groove 123b, where as shown by a dotted ellipse in fig. 2, the fifth groove 120b and the eighth groove 123b are a groove group, and the sixth groove 121b and the seventh groove 122b are a groove group; the fifth slot 120b and the eighth slot 123b are together offset by an angle d in the counterclockwise direction (as indicated by the arrow) such that the fifth slot 120b is offset to the position of the first slot 120a and the eighth slot 123b is offset to the position of the fourth slot 123 a; the sixth slot 121b and the seventh slot 122b are shifted by an angle d in a clockwise direction (as shown by an arrow), so that the sixth slot 121b is shifted to the position of the second slot 121a, and the seventh slot 122b is shifted to the position of the third slot 122a, thereby forming a new axisymmetrical structure, i.e., the structure of the rotor sheet 10 shown in fig. 1.
Of course, the embodiments of the present application are not limited thereto, and the angles of the two adjacent groove sets shifted in opposite directions are not necessarily identical. For example, the offset angle of the fifth and eighth grooves 120b and 123b is d1 (e.g., 5 °), while the offset angle of the sixth and seventh grooves 121b and 122b is d2 (e.g., 10 °), the offset structure is still an axisymmetric structure.
Further, for the division of the groove groups, each groove 12 may be individually a groove group, for example, the above-mentioned fifth groove 120b, sixth groove 121b, seventh groove 122b, and eighth groove 123b are each a groove group, wherein the fifth groove 120b is offset counterclockwise, the sixth groove 121b is offset clockwise, the seventh groove 122b is offset counterclockwise, and the eighth groove 123b is offset clockwise, and an axisymmetrical structure may also be formed.
It should be noted that the plurality of slots 12 in the same slot group are continuously arranged along the circumferential direction of the rotor sheet 10, so that the plurality of slots 12 in each slot group are ensured to be continuously arranged instead of being arranged at intervals, and the structure is simple and convenient to produce.
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 slots 12 are arranged along the circumferential direction of the rotor sheet 10, that is, the radial direction of each slot 12 is continuous, so that the plurality of slots 12 arranged in the radial direction are avoided, the structure can be simplified, and the production efficiency can be improved.
An embodiment of a second aspect of the present invention provides a rotor, including a plurality of rotor sheets 10 according to any one of the embodiments of the first aspect; a plurality of ferromagnets, each mounted in one of the slots 12 of one of the rotor laminations 10.
In this embodiment, the rotor sheet 10 of any one of the embodiments of the first aspect is disposed in the rotor, so that the rotor in this embodiment has all the beneficial effects of the embodiments, and details are not repeated herein.
In the above-described 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, 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, that is, the polarities of the adjacent magnetic poles are the same, or the ferromagnetic bodies are alternately arranged in the circumferential direction of the rotor, that is, the magnetic pole N and the magnetic pole N are adjacent, and the magnetic pole S are adjacent, which is advantageous for reducing the cogging torque and the torque ripple.
In the above embodiment, a plurality of ferromagnets are installed in series in the same slot group of the rotor lamination 10.
In this embodiment, a plurality of ferromagnets are installed in series, which is advantageous for improving the stability of the rotor operation.
It will be appreciated that, in the entire rotor sheet 10, preferably, a plurality of ferromagnets are also installed in series, i.e., one ferromagnet is installed in each slot 12, and there is no empty slot 12.
Of course, alternatively, the ferromagnets may be installed at intervals, that is, every other ferromagnet 12 is installed in a plurality of slots 12, or alternatively, a hollow slot 12 is further installed in two adjacent ferromagnets, so that the specification and the model number of the rotor sheet 10 can be reduced, the inventory can be reduced, and the production process can be simplified while the plurality of ferromagnets can still form an axisymmetric structure. For example, 2, 4, 6 or 8 ferromagnets can be mounted on the rotor sheet 10 having eight slots 12, so that only eight slots 12 of the rotor sheet 10 need to be produced, thereby facilitating mass production.
In the above embodiment, the plurality of ferromagnetic bodies are axisymmetrically distributed.
In the embodiment, the axial symmetry distribution of the plurality of ferromagnets can fully utilize the magnetism of the ferromagnets, improve the utilization rate of energy, and further improve the working stability and reliability of the rotor.
Embodiments of a third aspect of the invention provide an electrical machine comprising: the rotor of any of the embodiments of the second aspect described above.
By adopting the rotor of any one of the embodiments in the second aspect, the motor of the present embodiment has all the beneficial effects of the embodiments, and details are not repeated herein.
It is understood that the electric machine in the present application includes at least any one of an ac permanent magnet synchronous motor and generator, a dc permanent magnet synchronous motor and generator, and a permanent magnet synchronous motor and generator of a dc brushless motor.
An embodiment of a fourth aspect of the present invention provides a mold, which is used for manufacturing the rotor sheet 10 including any one of the embodiments of the first aspect, and a protrusion corresponding to the groove 12 of the rotor sheet 10 is provided on the mold.
In this embodiment, by using the mold for the rotor sheet 10 according to any one of the embodiments of the first aspect, the mold has a simple structure, and the processing of the rotor sheet 10 is more convenient.
As shown in fig. 1, in the overall oblique-pole rotor of the permanent magnet motor according to an embodiment of the present invention, the rotor is of a tangential structure, a rotor punching 10 includes an even number of asymmetrically distributed slots 12, and the slots 12 are used for placing magnetic steel; the magnetic steel structures corresponding to the magnetic steel grooves 12 are completely consistent, and the magnetic steels are alternately arranged along the circumferential direction of the rotor in a polarity manner; the even number of the magnetic steels are equally divided into Z groups (Z is more than 1), and the magnetic steels (h) in each group are a plurality of magnetic steels which are continuous along the circumferential direction; as shown in fig. 2, based on the tangential permanent magnet rotor with a centrosymmetric structure, the oblique-pole rotor is offset by an angle d along the central line of the magnetic steel, and the offset angle of the magnetic steel of the same group is consistent with the offset direction and 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 the magnetic poles of one half of the rotor are opposite to those of the other half of the rotor; the areas of q-axis areas corresponding to partial polar arcs are different, and air gap flux density harmonics of certain times can be offset; the permanent magnet arranged in the structure can achieve the effect of oblique poles by integral magnetic pole offset, and the rotor does not need to be segmented; in addition, the motor can reduce the cogging torque and the torque ripple and improve the power density of the motor, and compared with structures such as special magnetizing magnetic steel and a segmented skewed pole rotor, the motor has the advantages of simple process, convenience in manufacturing and the like.
FIG. 3 is a diagram illustrating counter potential harmonic content of a skewed pole rotor and a symmetric rotor in this embodiment; fig. 4 shows a comparison graph of electromagnetic torque waveforms of the oblique-pole rotor and the symmetric rotor in the embodiment.
The technical scheme of the invention is explained in detail in combination with the attached drawings, and 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 arranged in the structure can achieve the effect of oblique poles by integral magnetic pole offset, and the rotor does not need to be segmented; furthermore, the technical scheme can also reduce the cogging torque and the torque pulsation, improve the power density of the motor, and meanwhile, compared with the rotor punching sheet in the structures such as special magnetizing magnetic steel, a segmented skewed pole rotor and the like, the rotor punching sheet has the advantages of simple process, convenience in manufacturing, convenience in batch production and the like.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 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, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A rotor punching sheet is characterized by comprising:
the slots are arranged along the radial direction of the rotor punching sheet and used for installing ferromagnets;
any two adjacent grooves have a first included angle therebetween, and at least one of the first included angles is smaller than the other first included angles.
2. The rotor sheet as recited in claim 1,
the number of slots is even.
3. The rotor sheet as recited in claim 2,
the plurality of grooves are distributed in an axisymmetric manner.
4. The rotor sheet as recited in claim 3,
the plurality of the centrally symmetrically distributed grooves are equally divided into an even number of groove groups, each groove group and the groove group adjacent to the groove group are respectively deviated in opposite directions by the same preset angle, so that the plurality of the grooves are axially symmetrically distributed,
the grooves in each groove group are continuously arranged along the circumferential direction of the rotor punching sheet.
5. The rotor sheet according to any one of claims 1 to 3,
the plurality of slots are arranged along the circumferential direction of the rotor punching sheet.
6. A rotor, comprising:
a plurality of rotor sheets as claimed in any one of claims 1-5;
a plurality of ferromagnets, each ferromagnet mounted in a slot of one of the rotor laminations.
7. The rotor of claim 6,
in two adjacent ferromagnets, the polarities of the magnetic poles close to each other in the circumferential direction of the rotor are the same.
8. The rotor of claim 6,
and a plurality of ferromagnets are continuously arranged in the same slot group of the rotor punching sheet.
9. The rotor of claim 6,
the ferromagnets are distributed in an axial symmetry mode.
10. An electric machine, comprising:
the rotor of any one of claims 6-9.
11. A die for manufacturing the rotor sheet as claimed in any one of claims 1 to 5,
and the die is provided with bulges corresponding to the grooves of the rotor punching sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811504412.3A CN111293803A (en) | 2018-12-10 | 2018-12-10 | Rotor punching sheet, rotor, motor and die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811504412.3A CN111293803A (en) | 2018-12-10 | 2018-12-10 | Rotor punching sheet, rotor, motor and die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111293803A true CN111293803A (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811504412.3A Pending CN111293803A (en) | 2018-12-10 | 2018-12-10 | Rotor punching sheet, rotor, motor and die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111293803A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337016A (en) * | 2021-01-29 | 2022-04-12 | 华为数字能源技术有限公司 | Motor rotor, motor and moving platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864316A (en) * | 2003-08-02 | 2006-11-15 | 猪木宽至 | Rotating electric machine |
| CN102916512A (en) * | 2012-10-31 | 2013-02-06 | 大洋电机新动力科技有限公司 | Oblique pole rotor structure of permanent magnet synchronous motor |
| 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 |
-
2018
- 2018-12-10 CN CN201811504412.3A patent/CN111293803A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864316A (en) * | 2003-08-02 | 2006-11-15 | 猪木宽至 | Rotating electric machine |
| CN102916512A (en) * | 2012-10-31 | 2013-02-06 | 大洋电机新动力科技有限公司 | Oblique pole rotor structure of permanent magnet synchronous motor |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337016A (en) * | 2021-01-29 | 2022-04-12 | 华为数字能源技术有限公司 | Motor rotor, motor and moving platform |
| CN114337016B (en) * | 2021-01-29 | 2024-01-09 | 华为数字能源技术有限公司 | Motor rotor, motor and mobile platform |
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