CN216672698U - Rotor punching sheet and rotor iron core - Google Patents
Rotor punching sheet and rotor iron core Download PDFInfo
- Publication number
- CN216672698U CN216672698U CN202122389013.0U CN202122389013U CN216672698U CN 216672698 U CN216672698 U CN 216672698U CN 202122389013 U CN202122389013 U CN 202122389013U CN 216672698 U CN216672698 U CN 216672698U
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- Prior art keywords
- mounting hole
- main body
- rotor
- rare earth
- mounting
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- 238000004080 punching Methods 0.000 title claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 25
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 25
- 238000002955 isolation Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000010030 laminating Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model belongs to the technical field of motors, and particularly relates to a rotor punching sheet and a rotor iron core. The rotor punching sheet is simple in structure, the rotor punching sheet is formed by laminating, the non-rare earth permanent magnet with lower cost is installed in the first installation hole, and the rare earth permanent magnets with the same size are installed in the second installation hole and the third installation hole. The rare earth permanent magnets applied in the way are the same in shape and size, the standardization level of products is improved, the application cost of the rare earth permanent magnets can be further reduced on the premise that the non-rare earth permanent magnets are matched with the rare earth permanent magnets to reduce the production cost of the motor, and the performance of the motor is ensured.
Description
Technical Field
The utility model belongs to the technical field of motors, and particularly relates to a rotor punching sheet and a rotor iron core.
Background
In recent years, permanent magnet motors have been widely used in the fields of household appliances, electric automobiles, aerospace and the like, and the cost of the permanent magnet motor is directly determined by the price of a permanent magnet material. Rare earth permanent magnet motors have high efficiency but high cost, ferrite permanent magnet motors have lower cost but low motor efficiency.
Chinese patent CN112583152A discloses a rotor of a motor, which includes a rotor core, an outer ring permanent magnet and an inner ring permanent magnet, wherein the outer ring permanent magnet includes first permanent magnets distributed along the circumferential direction of the rotor core and extending along the circumferential direction of the rotor core, and second permanent magnets located between two adjacent first permanent magnets and extending along the radial direction of the rotor core, the inner ring permanent magnet is located on one side of the outer ring permanent magnet close to the axis of the rotor core, wherein the outer ring permanent magnet is a rare earth permanent magnet, and the inner ring permanent magnet is a non-rare earth permanent magnet. In the scheme, the rotor core is provided with a plurality of holes and large cross section area, so that the structural strength of the rotor core is poor, the adopted permanent magnets are different in shape and size, the management of parts is not facilitated, and the production cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a rotor punching sheet capable of considering both motor efficiency and motor production cost and a rotor core applying the rotor punching sheet.
In order to realize the purpose, the utility model adopts the technical scheme that: a rotor punching sheet comprises a body which is integrally annular and flaky, wherein first mounting holes are formed in the body and circumferentially arranged at intervals, and extend along the radial direction of the body; the region between two adjacent first mounting holes is provided with a second mounting hole and a third mounting hole, the main body parts of the second mounting hole and the third mounting hole, which are used for accommodating the permanent magnet, are holes with consistent cross-sectional shapes and sizes, the extending direction of the main body parts is arranged at a radial included angle with the body, and the second mounting hole and the third mounting hole are arranged at intervals in the radial direction of the body.
The rotor punching sheet is simple in structure, the rotor punching sheet is formed by laminating, the non-rare earth permanent magnet with lower cost is installed in the first installation hole, and the rare earth permanent magnets with the same size are installed in the second installation hole and the third installation hole. The rare earth permanent magnets applied in the method are the same in shape and size, the standardization level of products is improved, the application cost of the rare earth permanent magnets can be further reduced on the premise that the non-rare earth permanent magnets are matched with the rare earth permanent magnets to reduce the production cost of the motor, and the performance of the motor is guaranteed.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a front view of a rotor plate;
fig. 2 is a partially enlarged schematic view of a rotor core to which the rotor segment shown in fig. 1 is applied.
In the figure: 10. the magnetic switch comprises a body, 11, a first mounting hole, 111, a first mounting hole main body part, 12, a second mounting hole, 121, a second mounting hole main body part, 122, a second magnetic isolation part, 13, a third mounting hole, 131, a third mounting hole main body part and 132, and a third magnetic isolation part.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
A rotor punching sheet comprises a body 10 which is integrally annular and flaky, wherein first mounting holes 11 which are circumferentially arranged at intervals are formed in the body 10, and the first mounting holes 11 extend along the radial direction of the body 10; the area between two adjacent first mounting holes 11 is provided with a second mounting hole 12 and a third mounting hole 13, the main body parts 121 and 131 of the second mounting hole 12 and the third mounting hole 13 for accommodating the permanent magnet are holes with consistent cross-sectional shapes and sizes, the extending direction of the main body parts is arranged at an included angle with the radial direction of the body 10, and the second mounting hole 12 and the third mounting hole 13 are arranged at intervals in the radial direction of the body 10. Therefore, the permanent magnets with the same shape and size can be installed in the second installation hole 12 and the third installation hole 13, the same permanent magnet can be installed in the second installation hole 12 or the third installation hole 13 respectively, the permanent magnets are convenient to produce, purchase and store, the application cost of the permanent magnets is reduced, and the problem of product quality caused by assembly errors of the permanent magnets with the similar size and shape in production can be solved.
In this embodiment, the sectional area of the main body portion 111 of the one first mounting hole 11 for accommodating the permanent magnet is larger than the sum of the sectional areas of the one second mounting hole main body portion 121 and the one third mounting hole main body portion 131. When the rotor punching sheet is used for manufacturing the rotor core, the rotor punching sheet body 10 is overlapped, the non-rare earth permanent magnet is installed in the first installation hole 11, and the rare earth permanent magnets are installed in the second installation hole 12 and the third installation hole 13. The volume of the non-rare earth permanent magnet is larger than the total volume of the two rare earth permanent magnets, the magnetic energy product of the non-rare earth permanent magnet is low but the price is low, the magnetic energy product of the rare earth permanent magnet is high but the price is high, so that the non-rare earth permanent magnet is used as main excitation in a large quantity, the rare earth permanent magnet is used as auxiliary excitation in a small quantity, and excellent motor performance can be obtained at low cost.
The sections of the first, second and third mounting hole main body parts 111, 121 and 131 are rectangular, and the sections of the permanent magnets mounted in the first, second and third mounting hole main body parts are rectangular, so that the production, the processing and the transportation are facilitated.
The extension lines of the central connecting lines of the second and third mounting hole main body parts 121, 131 intersect with the axis of the body 10, i.e. the centers of the second and third mounting hole main body parts 121, 131 are located on the same radial line of the body 10, so that a superior magnetic circuit can be obtained, and the processing of holes is facilitated.
The central connecting line of the second and third mounting hole main body parts 121 and 131 and the central line of the first mounting hole 11 positioned at the two sides of the second and third mounting hole main body parts are arranged at equal angles, that is, the second and third mounting hole main body parts 121 and 131 are positioned in the middle of two adjacent first mounting holes 11, magnetic paths at the two sides are uniform, and magnetic leakage loss is reduced. Preferably, the second and third mounting hole main body portions 121 and 131 are strip-shaped holes with extending directions arranged in parallel, and the second and third mounting hole main body portions 121 and 131 extend along the tangential direction of the body 10, so as to obtain a better magnetic circuit.
The first mounting hole 11 is an open slot with a notch pointing to the outer side of the body 10, and a slot shoulder 112 is arranged at the notch, so that the cogging torque of the motor can be weakened, and a gap between the slot shoulders 112 can be filled with materials such as epoxy resin to fixedly connect the permanent magnet and the rotor punching sheet. The second mounting hole 12 is disposed adjacent to the axial center of the body 10, the third mounting hole 13 is located outside the second mounting hole 12, the second mounting hole 12 is disposed adjacent to the groove bottom of the first mounting hole 11, and the third mounting hole 13 is disposed adjacent to the notch of the first mounting hole 11. The distance between the inner hole edge of the second mounting hole body 121 and the axis of the body is smaller than or equal to the distance between the groove bottom of the first mounting hole 11 and the axis of the body, and the distance between the outer hole edge and the axis of the body is larger than or equal to the distance between the groove bottom of the first mounting hole 11 and the axis of the body.
For convenience of description, the second and third magnetism isolating parts 122, 132 are formed by defining that the two ends of the second and third mounting hole main body parts 121, 131 adjacent to the axial center side of the main body 10 are inner and the two ends of the second and third mounting hole main body parts 121, 131 far away from the axial center side of the main body 10 are outer and protruding or extending to the lateral sides, wherein the second magnetism isolating part 122 protrudes outwards from the two ends of the second mounting hole main body part 121, so that the second mounting hole 12 is integrally in the shape of a trapezoidal hole with a large inner side and a small outer side; the third magnetic isolation portion 132 extends obliquely outward from the end of the third mounting hole main body portion 131, so that the third mounting hole 13 is integrally in a [ -shaped hole shape with an opening end pointing to the outside of the body 10 and an opening increasing from inside to outside. The second and third magnetic isolation parts 122 and 132 can reduce magnetic leakage loss, and materials such as epoxy resin and the like are filled in the magnetic leakage loss parts to fixedly connect the permanent magnets and the rotor punching sheets.
The middle part of the body 10 which is integrally in the shape of an annular sheet is provided with a central shaft hole, and a rotor shaft key or a rotor shaft groove which is matched with the rotor is arranged on the central shaft hole.
Claims (9)
1. The utility model provides a rotor punching, is whole flaky body of annular (10), its characterized in that: the body (10) is provided with first mounting holes (11) which are circumferentially arranged at intervals, and the first mounting holes (11) extend along the radial direction of the body (10); the area between two adjacent first mounting holes (11) is provided with a second mounting hole and a third mounting hole (12 and 13), the main body parts (121 and 131) of the second mounting hole and the third mounting hole (12 and 13) for accommodating the permanent magnet are holes with consistent cross-sectional shapes and sizes, the extending direction of the main body parts is arranged at an included angle with the radial direction of the body (10), and the second mounting hole and the third mounting hole (12 and 13) are arranged at intervals in the radial direction of the body (10).
2. The rotor sheet according to claim 1, wherein: a first mounting hole (11) for receiving the main body portion (111) of the permanent magnet has a cross-sectional area larger than the sum of the cross-sectional areas of a second mounting hole main body portion (121) and a third mounting hole main body portion (131); the first, second and third mounting hole main bodies (111, 121, 131) have a rectangular cross section.
3. The rotor sheet according to claim 1, wherein: the extension line of the central connecting line of the second and third mounting hole main body parts (121, 131) is intersected with the axis of the body (10).
4. The rotor sheet as recited in claim 3, wherein: the central connecting line of the second and third mounting hole main body parts (121, 131) and the central line of the first mounting hole (11) positioned at the two sides of the second and third mounting hole main body parts are arranged at equal angles.
5. The rotor sheet according to claim 4, wherein: the second and third mounting hole main body parts (121, 131) are strip-shaped holes arranged in parallel in the extending direction.
6. The rotor sheet according to claim 5, wherein: the second and third mounting hole main body parts (121, 131) extend along the tangential direction of the body (10).
7. The rotor sheet according to claim 1, wherein: the first mounting hole (11) is an open slot with a notch pointing to the outer side of the body (10), and a slot shoulder (112) is arranged at the notch; the second mounting hole (12) is arranged close to the axis of the body (10), and the third mounting hole (13) is positioned outside the second mounting hole (12); the distance between the inner hole edge of the second mounting hole main body part (121) and the axis of the body is smaller than or equal to the distance between the groove bottom of the first mounting hole (11) and the axis of the body, and the distance between the outer hole edge and the axis of the body is larger than or equal to the distance between the groove bottom of the first mounting hole (11) and the axis of the body.
8. The rotor sheet according to claim 1, wherein: the two ends of the second and third mounting hole main body parts (121, 131) protrude or extend to the sides to form second and third magnetic isolating parts (122, 132), wherein the second magnetic isolating part (122) protrudes outwards from the two ends of the second mounting hole main body part (121), so that the second mounting hole (12) is integrally in a trapezoidal hole shape with a large inner side and a small outer side; the third magnetic isolation part (132) extends outwards from the end part of the third mounting hole main body part (131) in an inclined mode, so that the third mounting hole (13) is integrally in a [ -shaped hole shape with the opening end pointing to the outer side of the body (10) and the opening increasing from inside to outside.
9. A rotor core, characterized by: the rotor punching sheet is formed by overlapping the rotor punching sheets according to any one of claims 1 to 8, wherein the non-rare earth permanent magnet is arranged in the first mounting hole (11), and the rare earth permanent magnets are arranged in the second and third mounting holes (12 and 13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122389013.0U CN216672698U (en) | 2021-09-29 | 2021-09-29 | Rotor punching sheet and rotor iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122389013.0U CN216672698U (en) | 2021-09-29 | 2021-09-29 | Rotor punching sheet and rotor iron core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216672698U true CN216672698U (en) | 2022-06-03 |
Family
ID=81766599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122389013.0U Active CN216672698U (en) | 2021-09-29 | 2021-09-29 | Rotor punching sheet and rotor iron core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216672698U (en) |
-
2021
- 2021-09-29 CN CN202122389013.0U patent/CN216672698U/en active Active
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| GR01 | Patent grant |