CN211530872U - Disc type motor with double-layer Halbach array - Google Patents
Disc type motor with double-layer Halbach array Download PDFInfo
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- CN211530872U CN211530872U CN201922151805.7U CN201922151805U CN211530872U CN 211530872 U CN211530872 U CN 211530872U CN 201922151805 U CN201922151805 U CN 201922151805U CN 211530872 U CN211530872 U CN 211530872U
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Abstract
The utility model discloses a disk motor with double-deck halbach array, it includes motor housing, motor shaft and locates in the motor housing and along the first rotor magnet dish, stator coil and the second rotor magnet dish of the axial coaxial suit in proper order of motor shaft, stator coil and motor housing fixed link, first rotor magnet dish and second rotor magnet dish and motor shaft fixed link and can rotate relative to the stator coil; the first rotor magnet disc and the second rotor magnet disc both adopt Halbach arrays, the magnetizing directions of the corresponding axial permanent magnets of the first rotor magnet disc and the second rotor magnet disc are the same, and the magnetizing directions of the corresponding tangential permanent magnets are opposite. Adopt the utility model discloses, can improve the inside and outside magnetic field distribution of rotor, improve air gap magnetic flux density in the motor, improve motor torque and system efficiency.
Description
Technical Field
The present invention relates to a disc motor, and more particularly, to a disc motor having a double-layer halbach array.
Background
The disc type permanent magnet motor is also called an axial magnetic field motor, and has the advantages of short axial size, small volume, light weight and the like, so that the disc type permanent magnet motor becomes a hotspot in the field of motor research.
The application of the rare earth permanent magnet material improves the problems of low utilization rate and the like of the iron core of the traditional disc type motor, so that the disc type motor is further popularized. Meanwhile, in consideration of the contradiction that the storage amount of the rare earth permanent magnet material is small and the demand amount is large, the magnetism of the permanent magnet material needs to be fully utilized, and in the design process of the disc type permanent magnet motor, the use amount of the permanent magnet material is reduced as much as possible on the premise of ensuring the motor performance, so that the aim of saving the motor cost is fulfilled. That is, the air gap flux density is increased with a minimum of permanent magnet material to ensure that the air gap flux density in the machine is sufficiently large. The air gap flux density of the permanent magnet motor can be generally improved from two aspects, one is to select a permanent magnet material with better performance, while the high-performance permanent magnet material usually means higher price cost, which limits the selection of the permanent magnet material. And secondly, the arrangement structure of the permanent magnet magnetic pole array is changed, so that the air gap flux density is improved, which is an effective measure.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the disk type motor with the double-layer Halbach array can improve the distribution of magnetic fields inside and outside a rotor, improve the flux density of air gaps in the motor and improve the torque and the system efficiency of the motor.
In order to solve the technical problem, the utility model provides a disk motor with double-deck halbach array, it includes motor housing, motor shaft and locates in the motor housing and along the axial of motor shaft coaxial suit's first rotor magnet dish, stator coil and second rotor magnet dish in proper order, the stator coil with motor housing fixed connection, first rotor magnet dish and second rotor magnet dish with the motor shaft fixed connection and can rotate relative to the stator coil;
a plurality of first permanent magnets are uniformly distributed on the first rotor magnet disc along the circumferential direction of the first rotor magnet disc, the first permanent magnets are arranged in a Halbach array, and the first permanent magnets comprise first axial permanent magnets and first tangential permanent magnets;
a plurality of second permanent magnets are uniformly distributed on the second rotor magnet disc along the circumferential direction of the second rotor magnet disc, the second permanent magnets are arranged in a Halbach array, and the second permanent magnets comprise second axial permanent magnets and second tangential permanent magnets;
the first axial permanent magnets are opposite to the second axial permanent magnets one by one, and the magnetizing directions of the first axial permanent magnets are the same as those of the second axial permanent magnets;
the first tangential permanent magnets are opposite to the second tangential permanent magnets one by one, and the magnetizing directions of the first tangential permanent magnets are opposite to the magnetizing directions of the second tangential permanent magnets.
As the utility model discloses preferred scheme, the material of first permanent magnet is neodymium iron boron permanent magnet material.
As the utility model discloses preferred scheme, the material of second permanent magnet is neodymium iron boron permanent magnet material.
As a preferable aspect of the present invention, the first permanent magnet and the second permanent magnet have the same shape and size.
As a preferred aspect of the present invention, the stator coil is a disk-shaped coreless structure.
As the preferred scheme of the utility model, the shape of first permanent magnet and second permanent magnet is fan-shaped.
As a preferable aspect of the present invention, the shape of the winding unit of the stator coil matches the shape of the first permanent magnet and the second permanent magnet.
Implement the utility model provides a pair of disk motor with double-deck halbach array, compare with prior art, its beneficial effect lies in:
the disc type motor of the utility model adopts the permanent magnet rotor structure of the double-layer Halbach magnetic pole array, which can more easily obtain a magnetic field with ideal sinusoidal distribution and is beneficial to weakening the tooth space effect of the motor; the Halbach magnetic pole array has the characteristics that the magnetic field at one side is enhanced and the magnetic field at one side is weakened, so that the stator coil is arranged at the magnetic field enhancing side of the two Halbach magnetic pole arrays, the magnetic field density in the air gap of the motor is favorably improved, the self-shielding effect is realized, and the magnetic leakage of the motor body can be reduced; the Halbach magnetic pole array can reduce the no-load loss of the motor and improve the efficiency of the motor.
Drawings
Fig. 1 is a schematic structural diagram of a disk motor having a double-layer halbach array according to the present invention;
FIG. 2 is a schematic view of the direction of magnetization of each permanent magnet on either the first rotor magnet disk or the second rotor magnet disk;
fig. 3 is a magnetic circuit structure diagram of the disk motor with a double-layer halbach array which is axially split and then straightened;
in the figure, 1, a motor housing, 2, a motor rotating shaft, 3, a first rotor magnet disc, 30, a first permanent magnet, 31, a first axial permanent magnet, 32, a first tangential permanent magnet, 4, a stator coil, 5, a first rotor magnet disc, 50 and a second permanent magnet.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate the orientation or positional relationship, are used in the present invention as being based on the orientation or positional relationship shown in the drawings, and are used only for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be understood that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are used in a generic sense, e.g., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a disk motor with a double-layer halbach array, which includes a motor housing 1, a motor shaft 2 and a first rotor magnet disk 3, a stator coil 4 and a second rotor magnet disk 5 that are sequentially and coaxially sleeved in the motor housing 1 along the axial direction of the motor shaft 2, wherein the stator coil 4 is fixedly connected to the motor housing 1, and the first rotor magnet disk 3 and the second rotor magnet disk 5 are fixedly connected to the motor shaft 2 and can rotate relative to the stator coil 4.
As shown in fig. 2, the magnetization direction of each permanent magnet on first rotor magnet disc 3 (or second rotor magnet disc 5) is schematically shown, where "dot" represents that the magnetization direction of the cross section of the permanent magnet is out of the paper surface, and "x" represents that the magnetization direction of the cross section of the permanent magnet is in the paper surface. As shown in fig. 3, the structure of the magnetic circuit is obtained by axially dividing the motor and then straightening. A plurality of first permanent magnets 30 are uniformly distributed on the first rotor magnet disc 3 along the circumferential direction of the first rotor magnet disc, the plurality of first permanent magnets 30 are arranged in a halbach array, and the first permanent magnets 30 comprise first axial permanent magnets 31 and first tangential permanent magnets 32; a plurality of second permanent magnets 50 are uniformly distributed on the second rotor magnet disc 5 along the circumferential direction of the second rotor magnet disc, the plurality of second permanent magnets 50 are arranged in a halbach array, and the second permanent magnets 50 comprise second axial permanent magnets and second tangential permanent magnets; the first axial permanent magnets 31 are opposite to the second axial permanent magnets one by one, and the magnetizing directions of the first axial permanent magnets 31 are the same as those of the second axial permanent magnets; the first tangential permanent magnets 32 are opposite to the second tangential permanent magnets one by one, and the magnetizing directions of the first tangential permanent magnets 32 are opposite to the magnetizing directions of the second tangential permanent magnets.
Therefore, the disc type motor of the utility model adopts the permanent magnet rotor structure of the double-layer Halbach magnetic pole array (namely the first rotor magnet disc 3 and the second rotor magnet disc 5), which can more easily obtain a magnetic field with ideal sinusoidal distribution and is beneficial to weakening the tooth space effect of the motor; the Halbach magnetic pole array has the characteristics that the magnetic field at one side is enhanced and the magnetic field at one side is weakened, so that the stator coil 4 is arranged at the magnetic field enhancing side of the two Halbach magnetic pole arrays, the magnetic field density in the air gap of the motor is favorably improved, the self-shielding effect is realized, and the magnetic leakage of the motor body can be reduced; the Halbach magnetic pole array can reduce the no-load loss of the motor and improve the efficiency of the motor.
For example, in order to better ensure that the disc motor of the present embodiment has the advantages of short axial dimension, small volume, light weight, large air gap flux density, etc., the material of the first permanent magnet 30 and the second permanent magnet 50 is preferably neodymium iron boron permanent magnet material with high remanence density and high coercivity; the first permanent magnet 30 and the second permanent magnet 50 have the same shape and size, and the winding unit of the stator coil 4 has a shape matched with the shape of the first permanent magnet 30 and the second permanent magnet 50, preferably in a fan shape; the stator coil 4 is of a disc-shaped coreless structure and is encapsulated in an insulating material to form a disc-shaped stator.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (7)
1. A disc type motor with a double-layer Halbach array is characterized by comprising a motor shell, a motor rotating shaft, a first rotor magnet disc, a stator coil and a second rotor magnet disc, wherein the first rotor magnet disc, the stator coil and the second rotor magnet disc are sequentially coaxially sleeved along the axial direction of the motor rotating shaft;
a plurality of first permanent magnets are uniformly distributed on the first rotor magnet disc along the circumferential direction of the first rotor magnet disc, the first permanent magnets are arranged in a Halbach array, and the first permanent magnets comprise first axial permanent magnets and first tangential permanent magnets;
a plurality of second permanent magnets are uniformly distributed on the second rotor magnet disc along the circumferential direction of the second rotor magnet disc, the second permanent magnets are arranged in a Halbach array, and the second permanent magnets comprise second axial permanent magnets and second tangential permanent magnets;
the first axial permanent magnets are opposite to the second axial permanent magnets one by one, and the magnetizing directions of the first axial permanent magnets are the same as those of the second axial permanent magnets;
the first tangential permanent magnets are opposite to the second tangential permanent magnets one by one, and the magnetizing directions of the first tangential permanent magnets are opposite to the magnetizing directions of the second tangential permanent magnets.
2. A disc motor with a double-layer halbach array according to claim 1, wherein the first permanent magnet is made of a neodymium-iron-boron permanent magnet material.
3. A disc motor with a double-layer halbach array according to claim 1, wherein the second permanent magnet is made of a neodymium-iron-boron permanent magnet material.
4. A disk motor having a double-layer halbach array as claimed in claim 1, wherein the first permanent magnet and the second permanent magnet are identical in shape and size.
5. A disc motor having a double-layer halbach array as claimed in claim 1, wherein the stator coil is of disc-like coreless construction.
6. A disk motor with a double-layer halbach array according to claim 1, characterized in that the first permanent magnet and the second permanent magnet are each fan-shaped.
7. A disk motor having a double-layer halbach array according to claim 6, wherein the shape of the winding unit of the stator coil matches the shape of the first permanent magnet and the second permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922151805.7U CN211530872U (en) | 2019-12-04 | 2019-12-04 | Disc type motor with double-layer Halbach array |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922151805.7U CN211530872U (en) | 2019-12-04 | 2019-12-04 | Disc type motor with double-layer Halbach array |
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| Publication Number | Publication Date |
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| CN211530872U true CN211530872U (en) | 2020-09-18 |
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| CN201922151805.7U Active CN211530872U (en) | 2019-12-04 | 2019-12-04 | Disc type motor with double-layer Halbach array |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115313718A (en) * | 2022-08-29 | 2022-11-08 | 天津大学 | Split-ring Halbach permanent magnet array axial flux permanent magnet motor |
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2019
- 2019-12-04 CN CN201922151805.7U patent/CN211530872U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115313718A (en) * | 2022-08-29 | 2022-11-08 | 天津大学 | Split-ring Halbach permanent magnet array axial flux permanent magnet motor |
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