CN213817373U - Rotor and axial magnetic motor - Google Patents
Rotor and axial magnetic motor Download PDFInfo
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- CN213817373U CN213817373U CN202023171546.3U CN202023171546U CN213817373U CN 213817373 U CN213817373 U CN 213817373U CN 202023171546 U CN202023171546 U CN 202023171546U CN 213817373 U CN213817373 U CN 213817373U
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Abstract
The utility model discloses a rotor, which comprises a rotor bracket, a permanent magnet magnetic pole and a magnetizer magnetic pole, wherein the permanent magnet magnetic pole and the magnetizer magnetic pole are arranged around the center of the rotor bracket at intervals; the rotor bracket is made of magnetizers, and magnetic poles of the magnetizers are formed on the rotor bracket. The utility model discloses change one of two adjacent permanent magnet magnetic poles for the magnetizer magnetic pole, so, the quantity of permanent magnet magnetic pole has reduced half, will show so and reduce the axle cost. Owing to replace a permanent magnet magnetic pole in the magnetic circuit with the magnetizer magnetic pole, the magnetomotive force has reduced half, but the magnetic permeability of magnetizer magnetic pole is far greater than the permanent magnet, therefore the magnetic conductance is more original by a wide margin and is promoted, and the length of rethread reasonable selection air gap just so can make the utility model provides a magnetic flux density is close with the magnetic flux density in the traditional scheme. The utility model also discloses an axial magnetic flux motor.
Description
Technical Field
The utility model relates to an axial flux motor technical field, more specifically say, relate to a rotor and axial flux motor.
Background
At present, most permanent magnet materials are rare earth materials, the cost of the motor is continuously increased along with the continuous increase of the cost of the rare earth materials in recent years, and for an axial flux motor, the cost of the permanent magnet materials reaches about 40 percent of the total manufacturing cost.
Therefore, how to reduce the amount of permanent magnets and ensure the performance of the axial flux motor is a critical issue to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at reducing the quantity of permanent magnet, ensure axial flux motor's performance simultaneously. In order to achieve the above purpose, the utility model provides a following technical scheme:
a rotor comprises a rotor bracket, permanent magnet poles and magnetizer poles, wherein the permanent magnet poles and the magnetizer poles are distributed at intervals around the center of the rotor bracket;
the rotor bracket is made of magnetizers, magnetizer magnetic poles are formed in the rotor bracket, an installation groove is formed between every two adjacent magnetizer magnetic poles, the edge part of the installation groove on the rotor bracket is of an open structure, and permanent magnet magnetic poles are installed in the installation groove.
Preferably, be provided with the card protruding on the lateral wall of mounting groove, the card protruding along rotor support's radial extension, be provided with on the lateral wall of permanent magnet magnetic pole with the draw-in groove of card protruding adaptation.
Preferably, the permanent magnet rotor further comprises a guard ring, and the guard ring is sleeved on the peripheries of the rotor and the permanent magnet.
Preferably, the material of the guard ring is non-magnetic material.
Preferably, the permanent magnet pole includes a plurality of permanent magnet pole pieces assembled into the permanent magnet pole in a radial direction of the rotor frame.
Preferably, the permanent magnet pole blocks are bonded by glue to form the permanent magnet poles.
Preferably, all the permanent magnet poles have the same magnetizing direction and are along the thickness direction of the permanent magnet poles.
The utility model also provides an axial magnetic flux motor, including two stators and a rotor, the rotor is located two between the stator, the rotor is above-mentioned arbitrary one the rotor.
Preferably, a closed loop system is also included for injecting a target harmonic current to the armature winding for attenuating or eliminating a pulsating torque of the axial flux machine.
In traditional rotor, produce the magnetic circuit between two adjacent permanent magnet magnetic poles, and the utility model discloses change one in two adjacent permanent magnet magnetic poles for the magnetizer magnetic pole, so, the quantity of permanent magnet magnetic pole has reduced half, will show the cost that reduces axial flux motor so. Owing to replace a permanent magnet magnetic pole in the magnetic circuit with the magnetizer magnetic pole, the magnetomotive force has reduced half, but the magnetic permeability of magnetizer magnetic pole is far greater than the permanent magnet, therefore the magnetic conductance is more original by a wide margin and is promoted, and the length of rethread reasonable selection air gap just so can make the utility model provides a magnetic flux density is close with the magnetic flux density in the traditional scheme. The utility model discloses closed loop system has still been set up and has weakened or eliminated the pulsation torque to improve axial flux motor's torque quality.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without inventive efforts.
Fig. 1 is a schematic structural diagram of a permanent magnet pole according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a rotor support according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a guard ring according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a rotor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of the assembled rotor and stator according to an embodiment of the present invention.
Wherein, 1 is a permanent magnet magnetic pole, 1-1 is a clamping groove, 2 is a rotor bracket, 2-1 is a mounting groove, 2-2 is a clamping protrusion, 2-3 is a magnetizer magnetic pole, 3 is a protective ring, 4 is a stator core, and 5 is a stator winding.
Detailed Description
The utility model discloses a rotor, this rotor can be halved the quantity of permanent magnet magnetic pole, ensures simultaneously that axial flux motor and traditional axial flux motor have equal performance. The utility model also discloses an axial magnetic flux motor.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The utility model discloses a rotor includes spider 2 and permanent magnet magnetic pole 1, especially, still includes magnetizer magnetic pole 2-3. The permanent magnet magnetic poles 1 and the magnetizer magnetic poles 2-3 are arranged at intervals around the center of the rotor bracket 2. Then a magnetic circuit is created between the adjacent permanent magnet pole 1 and the magnetizer pole 2-3. In traditional rotor, produce the magnetic circuit between two adjacent permanent magnet magnetic poles 1, and the utility model discloses change one in two adjacent permanent magnet magnetic poles 1 for magnetizer magnetic pole 2-3, so, the quantity of permanent magnet magnetic pole 1 has reduced half, will show the cost that reduces axial flux motor so.
It should be noted that the magnitude of the magnetic flux density is proportional to the product of the magnetomotive force and the flux guide, and the magnetomotive force is approximately proportional to the magnetization direction length of the permanent magnet pole 1. The utility model discloses replace a permanent magnet magnetic pole 1 in the magnetic circuit with magnetizer magnetic pole 2-3, so the magnetomotive force has reduced half, but the magnetic conductivity of magnetizer magnetic pole 2-3 is far greater than the permanent magnet, therefore the magnetic conductance promotes more originally by a wide margin. Then the magnetic flux density of the utility model is close to the magnetic flux density of the traditional scheme by reasonably selecting the length of the air gap. Therefore, the utility model discloses when reducing half the quantity of permanent magnet magnetic pole 1, still ensured that axial flux motor and traditional axial flux motor have equal performance.
In an embodiment of the present invention, the material of the rotor support 2 is preferably a magnetizer, i.e. the whole rotor support 2 is a magnetizer. Several permanent magnet poles 1 are arranged around the center of the rotor frame 2. The part of the rotor support 2 located between two adjacent permanent magnet poles 1 is referred to as the magnetizer pole 2-3, and thus it can be understood that the magnetizer pole 2-3 is formed on the rotor support 2. For example, 12 permanent magnet poles 1 are provided in a conventional rotor, while only 6 permanent magnet poles 1 are required in the present invention. The 6 permanent magnet magnetic poles 1 are arranged on the rotor support 2 made of magnetic materials. The utility model provides a rotor structure has simplified the preparation degree of difficulty, has improved preparation efficiency.
The utility model provides a permanent magnet magnetic pole 1 is formed by the assembly of 1 piece of a plurality of permanent magnet magnetic poles. The permanent magnet magnetic poles 1 are arranged and assembled along the radial direction of the rotor support 2 and then are bonded into a whole by using special glue. The permanent magnet pole 1 assembled by a plurality of permanent magnet poles 1 can reduce eddy current loss.
The permanent magnet pole 1 and the rotor support 2 are mounted in the following way: an installation groove 2-1 is formed between two adjacent magnetizer magnetic poles on the rotor bracket 2, and the installation groove 2-1 extends to the edge portion of the rotor bracket 2. That is, the mounting groove 2-1 is open at the edge portion of the rotor frame 2, so that the permanent magnet pole 1 can be mounted into the mounting groove 2-1 through the open structure.
In order to ensure the fastness of installation, the utility model discloses still make following setting: a clamping protrusion 2-2 is arranged on the side wall of the mounting groove 2-1, and the clamping protrusion 2-2 is strip-shaped and extends along the radial direction of the rotor bracket 2. Correspondingly, a slot 1-1 is provided on the side wall of the permanent magnet pole 1, which slot 1-1 also extends in the radial direction of the rotor support 2. When the permanent magnet rotor is installed, the clamping groove 1-1 is aligned with the clamping protrusion 2-2 in advance, and then the permanent magnet magnetic pole 1 is pushed into the installation groove 2-1 along the radial direction of the rotor support 2.
In order to further improve the fastness of installation, the utility model discloses still set up guard ring 3, 3 covers of guard ring are established on the periphery of spider 2 and permanent magnet magnetic pole to further improve the fastness that permanent magnet magnetic pole 1 and spider 2 are connected. In order to prevent magnetic leakage, the utility model discloses set up the material of guard ring 3 into non-magnetic conduction material.
To traditional rotor, the opposite direction that magnetizes of two adjacent permanent magnet magnetic poles 1, and the utility model discloses well all permanent magnet magnetic poles 1's the direction that magnetizes is the same, and all along permanent magnet magnetic pole 1's thickness direction, perhaps says so along axial flux motor's axial, so, has further reduced the preparation degree of difficulty, has improved preparation efficiency.
The utility model also discloses an axial magnetic flux motor, this motor include two stators and a rotor. The rotor is disposed between the two stators. The rotor is any one of the rotors described above. The rotor has the above-mentioned effects, and the axial flux motor having the rotor also has the above-mentioned effects, so the details are not described herein.
The applicant finds that because the permanent magnet magnetic poles 1 and the magnetizer magnetic poles 2-3 are distributed at intervals, the permeance of the permanent magnet magnetic poles 1 is small, and the permeance of the magnetizer magnetic poles 2-3 is large, the air gap magnetic field of the axial flux motor is poor, the content of magnetic field harmonic waves is increased, and the amplitude of the pulsating torque is large.
To this end, the applicant has provided a closed-loop system capable of inputting to the armature windings, depending on the speed and torque of the axial flux machine, a target harmonic current that will generate a target harmonic magnetic field that will form a pulsating torque component that will attenuate or cancel the pulsating torque of the axial flux machine.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A rotor comprises a rotor bracket and permanent magnet magnetic poles, and is characterized by also comprising magnetizer magnetic poles, wherein the permanent magnet magnetic poles and the magnetizer magnetic poles are distributed at intervals around the center of the rotor bracket;
the rotor bracket is made of magnetizers, magnetizer magnetic poles are formed in the rotor bracket, an installation groove is formed between every two adjacent magnetizer magnetic poles, the edge part of the installation groove on the rotor bracket is of an open structure, and permanent magnet magnetic poles are installed in the installation groove.
2. The rotor of claim 1, wherein a clamping protrusion is arranged on a side wall of the mounting groove, the clamping protrusion extends along the radial direction of the rotor support, and a clamping groove matched with the clamping protrusion is arranged on a side wall of the permanent magnet magnetic pole.
3. The rotor of claim 1, further comprising a guard ring that fits around the periphery of the rotor and the permanent magnet poles.
4. The rotor of claim 3, wherein the guard ring is made of a non-magnetic material.
5. The rotor of claim 1, wherein the permanent magnet pole comprises a plurality of permanent magnet pole pieces assembled into the permanent magnet pole in a radial direction of the rotor frame.
6. The rotor of claim 5, wherein a plurality of the permanent magnet pole pieces are bonded to each other by glue to form the permanent magnet poles.
7. The rotor of claim 1, wherein all of the permanent magnet poles are magnetized in the same direction and along the thickness direction of the permanent magnet poles.
8. An axial flux machine comprising two stators and a rotor, said rotor being located between said two stators, wherein said rotor is according to any one of claims 1 to 7.
9. The axial-flux electric machine of claim 8, further comprising a closed-loop system for injecting a target harmonic current to the armature winding, the target harmonic current for attenuating or eliminating a pulsating torque of the axial-flux electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023171546.3U CN213817373U (en) | 2020-12-24 | 2020-12-24 | Rotor and axial magnetic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023171546.3U CN213817373U (en) | 2020-12-24 | 2020-12-24 | Rotor and axial magnetic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213817373U true CN213817373U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023171546.3U Active CN213817373U (en) | 2020-12-24 | 2020-12-24 | Rotor and axial magnetic motor |
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| Country | Link |
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| CN (1) | CN213817373U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022134777A1 (en) * | 2020-12-24 | 2022-06-30 | 浙江盘毂动力科技有限公司 | Rotor and axial flux motor |
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2020
- 2020-12-24 CN CN202023171546.3U patent/CN213817373U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022134777A1 (en) * | 2020-12-24 | 2022-06-30 | 浙江盘毂动力科技有限公司 | Rotor and axial flux motor |
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