CN214380347U - End magnetizing motor - Google Patents
End magnetizing motor Download PDFInfo
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- CN214380347U CN214380347U CN202023213201.XU CN202023213201U CN214380347U CN 214380347 U CN214380347 U CN 214380347U CN 202023213201 U CN202023213201 U CN 202023213201U CN 214380347 U CN214380347 U CN 214380347U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 129
- 239000010959 steel Substances 0.000 claims abstract description 129
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000004907 flux Effects 0.000 claims description 26
- 230000005284 excitation Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 abstract description 7
- 230000005347 demagnetization Effects 0.000 abstract description 4
- 230000002427 irreversible effect Effects 0.000 abstract description 3
- 238000004804 winding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a motor with magnetized end part and a rotor thereof, which comprises a stator, a rotor and a rotating shaft; the stator includes a stator core; the rotor includes a rotor core; the rotor iron core comprises a plurality of pairs of first magnetic steels; two first magnetic steels in each pair of first magnetic steels are arranged in a V shape; the magnetizing directions of two first magnetic steels in each pair of first magnetic steels are the same; the magnetizing directions of two adjacent pairs of first magnetic steels are opposite; the axial two end sides of the rotor iron core are provided with magnetic charging discs; the magnetizing disk includes: the non-magnetic conducting block of the inner ring, the magnetic conducting block of the outer ring and a second magnetic steel embedded on the magnetic conducting block; the plurality of second magnetic steels are arranged in a circular outline, and one second magnetic steel and one pair of first magnetic steels are correspondingly arranged; the second magnetic steel is triangular magnetic steel; and an interval formed by the magnetic conducting blocks is formed between two adjacent triangular magnetic steels on the magnetizing disc. Compared with the existing hybrid magnetizing permanent magnet synchronous motor, the permanent magnet synchronous motor can avoid the loss caused by overlarge current of the magnet exciting coil, and simultaneously can reduce the risk of irreversible demagnetization of the permanent magnet.
Description
Technical Field
The invention relates to the technical field of motor iron core magnetization, in particular to a motor with a magnetized end part.
Background
The built-in permanent magnet synchronous motor needs to embed the permanent magnets into the rotor core, the magnetic resistance of the stator magnetic potential on a direct axis and a quadrature axis is different due to the arrangement mode of the permanent magnets, the motor torque also comprises reluctance torque besides the permanent magnet torque, the power factor of the motor is improved, and the built-in permanent magnet synchronous motor has good weak magnetic performance, high torque density, strong demagnetization resistance of magnetic steel and other excellent performances. However, a closed loop formed by the permanent magnet in the iron core does not completely penetrate through the air gap and passes through the stator iron core, and cannot be in turn-linkage with a stator winding, so that a local magnetic leakage phenomenon is inevitably generated, the air gap flux density is reduced, the peak torque and the peak power of the motor cannot be further improved, and the development of the motor technology towards high power density is restricted.
In order to increase the air gap flux density, an excitation winding is usually added on a stator or a rotor in the prior art, but an excitation current needs to pass through a permanent magnet with a large magnetic resistance, so that the air gap flux density can be adjusted by a large excitation current, and meanwhile, the permanent magnet is in a risk of irreversible demagnetization. In addition, because the air gap flux density is limited by factors such as air gap length, how to enhance the air gap magnetic field under the condition of avoiding the problem caused by increasing the excitation winding is an urgent problem to be solved at the present stage.
Disclosure of Invention
The technical scheme of the invention is as follows: the end magnetizing motor aims at the problem that local magnetic flux leakage of a permanent magnet in an iron core is unavoidable, so that air gap flux density is reduced, and peak torque and peak power cannot be further improved.
The motor that tip related to in this scheme magnetizes: comprises a stator, a rotor and a rotating shaft; the rotor is assembled in the stator; the stator includes a stator core; the rotor includes a rotor core; the rotor iron core comprises a plurality of pairs of first magnetic steels; two first magnetic steels in each pair of first magnetic steels are arranged in a V shape; the magnetizing directions of two first magnetic steels in each pair of first magnetic steels are the same; the magnetizing directions of two adjacent pairs of first magnetic steels are opposite;
the axial two end sides of the rotor iron core are provided with magnetic charging discs; the magnetizing disk includes: the non-magnetic conducting block of the inner ring, the magnetic conducting block of the outer ring and a second magnetic steel embedded on the magnetic conducting block; the plurality of second magnetic steels are arranged in a circular outline, and one second magnetic steel and one pair of first magnetic steels are correspondingly arranged; the second magnetic steel is triangular magnetic steel; an interval formed by the magnetic conduction blocks is arranged between two adjacent triangular magnetic steels on the magnetizing disc.
Preferably, the magnetizing directions of the magnetizing discs of the two adjacent second magnetic steels on the magnetizing discs are opposite.
Preferably, the first magnetic steel is a permanent magnet magnetized in the radial direction; the second magnetic steel is an axially magnetized permanent magnet.
Preferably, the rotor core comprises m pairs of first magnetic steels, the stator comprises m second magnetic steels, and m is a magnetic pole pair number.
Preferably, the pair of first magnetic steels includes a first magnetic steel a and a first magnetic steel b, and the excitation magnetic circuit of the pair of first magnetic steels on the rotor: starting from the N pole side of a first magnetic steel a, the magnetic steel reaches a stator-rotor air gap through a rotor iron core, then sequentially passes through a stator tooth, a stator yoke, another stator tooth, a stator-rotor air gap, an S pole of an adjacent first magnetic steel b, the rotor iron core and finally returns to the S pole of the first magnetic steel a.
Preferably, two adjacent second magnetic steels are a second magnetic steel a and a second magnetic steel B, and the magnetic flux path generated by the second magnetic steel on the magnetic charging disk is as follows: the magnetic flux flows from the N pole side of the second magnetic steel A, passes through the axial gap to reach the rotor, sequentially passes through the rotor core, the stator and rotor air gap, the stator core, the stator and rotor air gap, the rotor core, the axial gap, the S pole of the adjacent second magnetic steel B and the magnetic conduction block, and finally returns to the S pole of the second magnetic steel A. The end magnetic flux and the rotor magnetic flux are merged at the air gap of the motor, and the air gap magnetic flux of the motor is increased.
The invention has the advantages that:
1. the end magnetizing magnetic steel generates excitation flux which acts on the air gap magnetic field together with the excitation flux generated by the rotor magnetic steel, so that the air gap flux density is improved, and the torque density and the power density of the motor are improved.
2. Compared with the existing hybrid magnetizing permanent magnet synchronous motor, the permanent magnet synchronous motor can avoid the loss caused by overlarge current of the magnet exciting coil, and simultaneously can reduce the risk of irreversible demagnetization of the permanent magnet.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is an assembly view of an end-magnetized motor and its rotor;
FIG. 2 is a schematic view of an end face arrangement of a rotor according to the present invention;
FIG. 3 is a block diagram of a magnetic charger disk according to the present invention;
FIG. 4 is a schematic view of the flux path in the present invention;
wherein, 1, stator; 2. a rotor; 21. rectangular magnetic steel; 3. charging a magnetic disc; 31. triangular magnetic steel; 32. a magnetic conduction block; 33. a non-magnetic conductive block; 4. a rotating shaft.
Detailed Description
Example 1:
an end-magnetizing motor: comprises a stator, a rotor and a rotating shaft; the rotor is assembled in the stator; the stator includes a stator core; the rotor includes a rotor core; the rotor iron core comprises a plurality of pairs of first magnetic steels; two first magnetic steels in each pair of first magnetic steels are arranged in a V shape; the magnetizing directions of two first magnetic steels in each pair of first magnetic steels are the same; the magnetizing directions of two adjacent pairs of first magnetic steels are opposite.
The axial two end sides of the rotor iron core are provided with magnetic charging discs; the magnetizing disk includes: the non-magnetic conducting block of the inner ring, the magnetic conducting block of the outer ring and a second magnetic steel embedded on the magnetic conducting block; the plurality of second magnetic steels are arranged in a circular outline, and one second magnetic steel and one pair of first magnetic steels are correspondingly arranged; the second magnetic steel is triangular magnetic steel; an interval formed by the magnetic conduction blocks is arranged between two adjacent triangular magnetic steels on the magnetizing disc.
The magnetizing directions of the two adjacent second magnetic steel magnetizing discs on the magnetizing disc are opposite.
The first magnetic steel is a permanent magnet magnetized in the radial direction; the second magnetic steel is an axially magnetized permanent magnet.
The rotor core comprises m pairs of first magnetic steels, the stator comprises m second magnetic steels, and m is a magnetic pole pair number.
The pair of first magnetic steels comprises a first magnetic steel a and a first magnetic steel b, and an excitation magnetic circuit of the pair of first magnetic steels on the rotor is as follows: starting from the N pole side of a first magnetic steel a, the magnetic steel reaches a stator-rotor air gap through a rotor iron core, then sequentially passes through a stator tooth, a stator yoke, another stator tooth, a stator-rotor air gap, an S pole of an adjacent first magnetic steel b, the rotor iron core and finally returns to the S pole of the first magnetic steel a.
Two adjacent second magnet steels are a second magnet steel A and a second magnet steel B, and the magnetic flux path generated by the second magnet steel on the magnetic charging disc is as follows: the magnetic flux flows from the N pole side of the second magnetic steel A, passes through the axial gap to reach the rotor, sequentially passes through the rotor core, the stator and rotor air gap, the stator core, the stator and rotor air gap, the rotor core, the axial gap, the S pole of the adjacent second magnetic steel B and the magnetic conduction block, and finally returns to the S pole of the second magnetic steel A. The end magnetic flux and the rotor magnetic flux are merged at the air gap of the motor, and the air gap magnetic flux of the motor is increased.
Example 2:
the embodiment of the invention is explained by adopting a built-in V-shaped magnetic steel permanent magnet synchronous motor, and the pole slot is matched into 8-pole 48-slot.
As shown in fig. 1, the motor includes a stator 1, a rotor 2, two end magnetic charging disks 3, and a rotating shaft 4, wherein the stator includes a stator core and a stator winding.
As shown in fig. 2, the rotor core is provided with m pairs (pole pair numbers) of rectangular magnetic steels 21 (i.e., first magnetic steels) having the same structure and symmetrical positions, and the magnetizing direction of the rectangular magnetic steels 21 is radial.
As shown in fig. 3, the two end magnetizing discs 3 are located at two axial ends, are mirror-symmetrical, and are respectively provided with m triangular magnetic steels 31 (i.e. second magnetic steels), the magnetizing directions of the triangular magnetic steels 31 are axial, the magnetizing directions of two adjacent triangular magnetic steels 31 are opposite, all the triangular magnetic steels 31 are embedded on the magnetizing discs 3, the triangular magnetic steels 31 are embedded in the magnetic conductive blocks 32, and the magnetizing discs 3 at the ends are further provided with non-magnetic conductive blocks 33 for fixing.
As shown in fig. 4, the magnetic flux generated by the N-pole magnetic steel on the magnetic charging disk 3 passes through the gap to reach the rotor-rotor core-stator-rotor air gap-stator core-stator-rotor air gap-rotor core-gap-S-pole magnetic steel-magnetic conductive block-N-pole magnetic steel, and the magnetic flux at the end part is merged with the magnetic flux on the rotor to increase the air gap magnetic flux of the motor.
The embodiments are merely illustrative of the principles and effects of the present invention, and do not limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed herein be covered by the appended claims.
Claims (6)
1. An end part magnetizing motor comprises a stator, a rotor and a rotating shaft; the rotor is assembled in the stator; the stator includes a stator core; the rotor includes a rotor core; the method is characterized in that: the rotor iron core comprises a plurality of pairs of first magnetic steels; two first magnetic steels in each pair of first magnetic steels are arranged in a V shape; the magnetizing directions of two first magnetic steels in each pair of first magnetic steels are the same; the magnetizing directions of two adjacent pairs of first magnetic steels are opposite;
the axial two end sides of the rotor iron core are provided with magnetic charging discs; the magnetizing disk includes: the non-magnetic conducting block of the inner ring, the magnetic conducting block of the outer ring and a second magnetic steel embedded on the magnetic conducting block; the plurality of second magnetic steels are arranged in a circular outline, and one second magnetic steel and one pair of first magnetic steels are correspondingly arranged; the second magnetic steel is triangular magnetic steel; and an interval formed by the magnetic conducting blocks is formed between two adjacent triangular magnetic steels on the magnetizing disc.
2. An end-magnetized motor as defined in claim 1, wherein: and the magnetizing directions of the two adjacent magnetizing discs of the second magnetic steel on the magnetizing disc are opposite.
3. An end-magnetized motor as defined in claim 1, wherein: the first magnetic steel is a permanent magnet magnetized in the radial direction; the second magnetic steel is an axially magnetized permanent magnet.
4. An end-magnetized motor as defined in claim 3, wherein: the rotor core comprises m pairs of first magnetic steels, the stator comprises m pairs of second magnetic steels, and m is a magnetic pole pair number.
5. An end-magnetized motor as defined in claim 1, wherein: the pair of first magnetic steels comprises a first magnetic steel a and a first magnetic steel b, and the excitation magnetic circuits of the pair of first magnetic steels on the rotor are as follows: starting from the N pole side of a first magnetic steel a, the magnetic steel reaches a stator-rotor air gap through a rotor iron core, then sequentially passes through a stator tooth, a stator yoke, another stator tooth, a stator-rotor air gap, an S pole of an adjacent first magnetic steel b, the rotor iron core and finally returns to the S pole of the first magnetic steel a.
6. An end-magnetized motor as defined in claim 5, wherein: two adjacent second magnet steels are a second magnet steel A and a second magnet steel B, and the magnetic flux path generated by the second magnet steel on the magnetic charging disc is as follows: the magnetic flux flows from the N pole side of the second magnetic steel A, passes through the axial gap to reach the rotor, sequentially passes through the rotor core, the stator and rotor air gap, the stator core, the stator and rotor air gap, the rotor core, the axial gap, the S pole of the adjacent second magnetic steel B and the magnetic conduction block, and finally returns to the S pole of the second magnetic steel A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023213201.XU CN214380347U (en) | 2020-12-28 | 2020-12-28 | End magnetizing motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023213201.XU CN214380347U (en) | 2020-12-28 | 2020-12-28 | End magnetizing motor |
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| CN214380347U true CN214380347U (en) | 2021-10-08 |
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| CN202023213201.XU Active CN214380347U (en) | 2020-12-28 | 2020-12-28 | End magnetizing motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112671136A (en) * | 2020-12-28 | 2021-04-16 | 苏州英磁新能源科技有限公司 | End-magnetized motor and rotor thereof |
| WO2024113915A1 (en) * | 2022-11-29 | 2024-06-06 | 珠海格力电器股份有限公司 | Rotor structure and permanent magnet synchronous motor |
-
2020
- 2020-12-28 CN CN202023213201.XU patent/CN214380347U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112671136A (en) * | 2020-12-28 | 2021-04-16 | 苏州英磁新能源科技有限公司 | End-magnetized motor and rotor thereof |
| WO2024113915A1 (en) * | 2022-11-29 | 2024-06-06 | 珠海格力电器股份有限公司 | Rotor structure and permanent magnet synchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Suzhou Heyu Finance Leasing Co.,Ltd. Assignor: SUZHOU YINGCI NEW ENERGY TECHNOLOGY CO.,LTD. Contract record no.: X2023980043152 Denomination of utility model: A motor with end magnetization Granted publication date: 20211008 License type: Exclusive License Record date: 20231010 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A motor with end magnetization Effective date of registration: 20231012 Granted publication date: 20211008 Pledgee: Suzhou Heyu Finance Leasing Co.,Ltd. Pledgor: SUZHOU YINGCI NEW ENERGY TECHNOLOGY CO.,LTD. Registration number: Y2023980060823 |