CN220570373U - Rotor for permanent magnet synchronous motor and permanent magnet synchronous motor - Google Patents
Rotor for permanent magnet synchronous motor and permanent magnet synchronous motor Download PDFInfo
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- CN220570373U CN220570373U CN202320347726.7U CN202320347726U CN220570373U CN 220570373 U CN220570373 U CN 220570373U CN 202320347726 U CN202320347726 U CN 202320347726U CN 220570373 U CN220570373 U CN 220570373U
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- magnetic steel
- rotor
- permanent magnet
- synchronous motor
- magnet synchronous
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 91
- 239000010959 steel Substances 0.000 claims abstract description 91
- 229910001172 neodymium magnet Inorganic materials 0.000 claims abstract description 50
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 238000005245 sintering Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The utility model discloses a rotor for a permanent magnet synchronous motor and the permanent magnet synchronous motor, and belongs to the field of mechanical design. After the scheme of bonding the NdFeB magnetic steel and sintering the NdFeB magnetic steel is adopted, compared with a motor only using the sintered NdFeB magnetic steel, the magnetic field of the motor is enhanced, the output performance is improved, and the peak torque and the peak power of the motor are improved after the bonding NdFeB magnetic steel is filled under the same condition; due to the improvement of power and torque, the scheme provides a solution space for reducing motor loss, in particular to the magnetic steel loss. By utilizing the characteristic of the adhesive component in the bonded NdFeB magnetic steel, the consumption of the sintered NdFeB magnetic steel is reduced, the magnetic steel loss can be reduced, the magnetic steel temperature is reduced, and the efficiency is improved.
Description
Technical Field
The utility model relates to the field of mechanical design, in particular to a rotor for a permanent magnet synchronous motor and the permanent magnet synchronous motor.
Background
The permanent magnet synchronous motor mainly comprises a stator, a rotor, an end cover and other parts, wherein the stator is formed by laminating laminations so as to reduce iron loss generated when the motor operates, and a three-phase alternating current winding, called an armature, is arranged in the stator. The rotor may be made in solid form or may be pressed from laminations with permanent magnet material mounted thereon. According to the different positions of the permanent magnet materials on the motor rotor, the permanent magnet synchronous motor can be divided into two structural forms of protruding type and built-in type.
At present, the main current driving motor for the vehicle adopts sintered NdFeB magnetic steel, and when larger power and torque are needed, the dosage of the magnetic steel needs to be increased. Meanwhile, the generated loss is increased along with the increase of the dosage of the magnetic steel, so that the motor efficiency is reduced, the rotor temperature is improved, and the demagnetizing risk of the magnetic steel is increased.
Disclosure of Invention
The utility model provides a rotor for a permanent magnet synchronous motor and the permanent magnet synchronous motor, which can reduce motor loss when power and torque requirements are larger. The technical scheme is as follows:
according to an aspect of the present utility model, there is provided a rotor for a permanent magnet synchronous motor, the rotor comprising: the rotor comprises a rotor body 1, a magnetic steel groove 2, sintered NdFeB magnetic steel 3 and bonded NdFeB magnetic steel 4;
the magnetic steel groove 2 is formed in the acting surface of the rotor main body 1, the sintered NdFeB magnetic steel 3 is inserted into the magnetic steel groove 2, and the bonded NdFeB magnetic steel 4 is located in a gap between the magnetic steel groove 2 and the sintered NdFeB magnetic steel 3.
Optionally, the bonding neodymium iron boron magnetic steel 4 is formed by filling a gap between the magnetic steel groove 2 and the sintered neodymium iron boron magnetic steel 3.
Optionally, the bonded neodymium iron boron magnetic steel 4 is a composite permanent magnet material.
Optionally, on the rotor main body 1, the magnetic steel grooves 2 are symmetrically designed;
two symmetrical magnetic steel grooves 2 form a rotor magnetic circuit 5.
Optionally, the rotor magnetic circuit is of a V-shaped symmetrical structure;
under the V-shaped symmetrical structure, the magnetic steel grooves 2 are distributed in a V shape.
Optionally, the rotor magnetic circuit is of a U-shaped symmetrical structure;
under the U-shaped symmetrical structure, the magnetic steel grooves 2 are distributed in a U shape.
Optionally, at least one set of rotor circuits 5 is provided at the symmetry axis of the magnetic steel groove 2.
According to an aspect of the present utility model, there is provided a permanent magnet synchronous motor including: a rotor for a permanent magnet synchronous motor, a stator for a permanent magnet synchronous motor, and a rotating shaft;
the rotor for a permanent magnet synchronous motor is the rotor for a permanent magnet synchronous motor described above;
the stator for the permanent magnet synchronous motor and the rotor for the permanent magnet synchronous motor are driven by the rotating shaft to rotate relatively.
The technical scheme provided by the utility model at least comprises the following beneficial effects:
after the scheme of bonding the NdFeB magnetic steel and sintering the NdFeB magnetic steel is adopted, compared with a motor only using the sintered NdFeB magnetic steel, the magnetic field of the motor is enhanced, the output performance is improved, and after bonding the NdFeB magnetic steel is filled under the same condition, the peak torque of the motor is improved by 11%, and the peak power is improved by 20%; due to the improvement of power and torque, the scheme provides a solution space for reducing motor loss, in particular to the magnetic steel loss. By utilizing the characteristic of the adhesive component in the bonded NdFeB magnetic steel, the consumption of the sintered NdFeB magnetic steel is reduced, the magnetic steel loss can be reduced, the magnetic steel temperature is reduced, and the efficiency is improved.
Drawings
Fig. 1 shows a schematic diagram of a rotor for a permanent magnet synchronous motor according to an exemplary embodiment of the present utility model;
fig. 2 shows a schematic structural view of a rotor magnetic circuit provided by an exemplary embodiment of the present utility model;
fig. 3 shows a schematic structural diagram of a permanent magnet synchronous motor according to an exemplary embodiment of the present utility model.
Wherein, each reference numeral in the drawings is as follows:
1: a rotor body; 2: a magnetic steel groove;
3: sintering the NdFeB magnetic steel; 4: bonding NdFeB magnetic steel;
5: a rotor magnetic circuit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.
References herein to "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
Fig. 1 shows a schematic diagram of a rotor for a permanent magnet synchronous motor according to an exemplary embodiment of the present utility model. The rotor for the permanent magnet synchronous motor comprises a rotor main body 1, a magnetic steel groove 2, sintered NdFeB magnetic steel 3 and bonded NdFeB magnetic steel 4.
The magnetic steel groove 2 is formed in the acting surface of the rotor main body 1, the sintered NdFeB magnetic steel 3 is inserted into the magnetic steel groove 2, and the bonded NdFeB magnetic steel 4 is positioned in a gap between the magnetic steel groove 2 and the sintered NdFeB magnetic steel 3.
In one possible embodiment, the bonded NdFeB magnet steel 4 is produced by filling in a gap between the magnet steel tank 2 and the sintered NdFeB magnet steel 3.
Wherein, the bonding NdFeB magnetic steel 4 is a composite permanent magnetic material, which is prepared by uniformly mixing with permanent magnetic material powder by using materials such as resin, plastic or low-melting point alloy as an adhesive, and then adopting the molding modes such as compression, injection or extrusion. The bonded NdFeB has the advantages of large shape freedom degree, high dimensional accuracy and the like. However, since bonded NdFeB contains a binder, the magnetic properties are inferior to sintered NdFeB and are isotropic.
The sintered NdFeB permanent magnetic material adopts a powder metallurgy process, the smelted alloy is made into powder and pressed into a pressing blank in a magnetic field, the pressing blank is sintered in inert gas or vacuum to achieve densification, and in order to improve the coercive force of the magnet, ageing heat treatment is generally required. Therefore, the sintered NdFeB has higher coercivity and remanence and is anisotropic.
Alternatively, on the rotor body 1, the magnetic steel grooves 2 are of symmetrical design. As shown in fig. 1, the magnetic steel grooves 2 are symmetrically distributed, and then sintered nd-fe-b magnetic steel 3 placed in the grooves is symmetrically distributed, and then the injected bonded nd-fe-b magnetic steel 4 is symmetrically distributed.
As shown in fig. 2, two symmetrical magnetic steel grooves 2 form a rotor magnetic circuit 5, and in the drawing schematically shown in the present utility model, the rotor magnetic circuit is shown to have a V-shaped symmetrical structure, and in addition, the rotor magnetic circuit may have a U-shaped symmetrical structure, a linear structure, or a V-shaped structure, which is not limited thereto.
Under the V-shaped symmetrical structure, the magnetic steel grooves 2 are arranged in a V shape, and under the U-shaped symmetrical structure, the magnetic steel grooves 2 are arranged in a U shape.
Further, at least one set of rotor magnetic circuits 5 is provided at the symmetry axis of the magnetic steel groove 2. As shown in fig. 1 and 2, two sets of rotor magnetic circuits 5 are provided, and a double V-shape is presented due to the V-shape symmetrical structure.
In summary, after the scheme of bonding the neodymium iron boron magnetic steel and combining the sintered neodymium iron boron magnetic steel is adopted, compared with a motor only using the sintered neodymium iron boron magnetic steel, the magnetic field of the motor is enhanced, the output performance is improved, and after bonding the neodymium iron boron magnetic steel is filled under the same condition, the peak torque of the motor is improved by 11%, and the peak power is improved by 20%; due to the improvement of power and torque, the scheme provides a solution space for reducing motor loss, in particular to the magnetic steel loss. By utilizing the characteristic of the adhesive component in the bonded NdFeB magnetic steel, the consumption of the sintered NdFeB magnetic steel is reduced, the magnetic steel loss can be reduced, the magnetic steel temperature is reduced, and the efficiency is improved.
Fig. 3 shows a schematic structural diagram of a permanent magnet synchronous motor according to an exemplary embodiment of the present utility model. The permanent magnet synchronous motor comprises a rotor for the permanent magnet synchronous motor, a stator for the permanent magnet synchronous motor and a rotating shaft.
The rotor for a permanent magnet synchronous motor is the rotor for a permanent magnet synchronous motor described above; the stator for the permanent magnet synchronous motor and the rotor for the permanent magnet synchronous motor are driven by the rotating shaft to rotate relatively.
The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model, but rather, the utility model is to be construed as limited to the appended claims.
Claims (8)
1. A rotor for a permanent magnet synchronous motor, characterized by comprising: the rotor comprises a rotor main body (1), a magnetic steel groove (2), sintered NdFeB magnetic steel (3) and bonded NdFeB magnetic steel (4);
the magnetic steel groove (2) is formed in the acting surface of the rotor main body (1), the sintered NdFeB magnetic steel (3) is inserted into the magnetic steel groove (2), and the bonded NdFeB magnetic steel (4) is located in a gap between the magnetic steel groove (2) and the sintered NdFeB magnetic steel (3).
2. The rotor for a permanent magnet synchronous motor according to claim 1, wherein the bonded neodymium iron boron magnetic steel (4) is produced by filling gaps between the magnetic steel groove (2) and the sintered neodymium iron boron magnetic steel (3).
3. The rotor for a permanent magnet synchronous motor according to claim 1, wherein the bonded neodymium iron boron magnetic steel (4) is a composite permanent magnet material.
4. Rotor for a permanent magnet synchronous motor according to claim 1, characterized in that on the rotor body (1) the magnetic steel grooves (2) are of symmetrical design;
two symmetrical magnetic steel grooves (2) form a rotor magnetic circuit (5).
5. The rotor for a permanent magnet synchronous motor according to claim 4, wherein the rotor magnetic circuit has a V-shaped symmetrical structure;
under the V-shaped symmetrical structure, the magnetic steel grooves (2) are arranged in a V shape.
6. The rotor for a permanent magnet synchronous motor according to claim 4, wherein the rotor magnetic circuit has a U-shaped symmetrical structure;
under the U-shaped symmetrical structure, the magnetic steel grooves (2) are arranged in a U shape.
7. Rotor for a permanent magnet synchronous motor according to claim 4, characterized in that at least one set of rotor circuits (5) is provided at the symmetry axis of the magnet steel groove (2).
8. A permanent magnet synchronous motor, characterized in that it comprises: a rotor for a permanent magnet synchronous motor, a stator for a permanent magnet synchronous motor, and a rotating shaft;
the rotor for a permanent magnet synchronous motor according to any one of claims 1 to 7;
the stator for the permanent magnet synchronous motor and the rotor for the permanent magnet synchronous motor are driven by the rotating shaft to rotate relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320347726.7U CN220570373U (en) | 2023-02-28 | 2023-02-28 | Rotor for permanent magnet synchronous motor and permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320347726.7U CN220570373U (en) | 2023-02-28 | 2023-02-28 | Rotor for permanent magnet synchronous motor and permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220570373U true CN220570373U (en) | 2024-03-08 |
Family
ID=90093682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320347726.7U Active CN220570373U (en) | 2023-02-28 | 2023-02-28 | Rotor for permanent magnet synchronous motor and permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220570373U (en) |
-
2023
- 2023-02-28 CN CN202320347726.7U patent/CN220570373U/en active Active
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