CN112688515B - Magnetic flux switching type axial magnetic field permanent magnet motor - Google Patents
Magnetic flux switching type axial magnetic field permanent magnet motor Download PDFInfo
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- CN112688515B CN112688515B CN202011585595.3A CN202011585595A CN112688515B CN 112688515 B CN112688515 B CN 112688515B CN 202011585595 A CN202011585595 A CN 202011585595A CN 112688515 B CN112688515 B CN 112688515B
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- stator
- permanent magnet
- armature
- rotor
- core
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- 230000004907 flux Effects 0.000 title claims abstract description 21
- 238000004804 winding Methods 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000008111 motor development Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
Classifications
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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
Abstract
The invention relates to the field of axial magnetic field permanent magnet motors, in particular to a magnetic flux switching type axial magnetic field permanent magnet motor which comprises a permanent magnet stator A, a rotor A, an armature stator, a rotor B and a permanent magnet stator B which are coaxially and sequentially arranged along the axial direction; the permanent magnet stator A and the permanent magnet stator B comprise a permanent magnet stator iron core, a high coercivity permanent magnet and a permanent magnet stator bracket made of non-magnetic conductive materials; the rotor A and the rotor B comprise rotor iron cores and rotor supports made of non-magnetic conductive materials; the armature stator comprises an armature stator core, an armature winding and two armature stator brackets made of non-magnetic conductive materials. The permanent magnet and the armature winding of the magnetic flux switching type axial magnetic field permanent magnet motor are positioned on different stators, so that the space conflict between electromagnetic loads of the existing magnetic flux switching type axial magnetic field permanent magnet motor is solved, the torque density of the motor is improved, and the armature stator, the permanent magnet stator and the rotor of the motor can be processed in a modularized manner, and the difficulty and the cost of a production and processing technology are reduced.
Description
Technical Field
The invention relates to the field of axial magnetic field permanent magnet motors, in particular to a magnetic flux switching type axial magnetic field permanent magnet motor.
Background
The '2025 electric automobile drive motor development circuit diagram' issued by the United states drive organization provides higher performance index requirements for the electric automobile drive motor, and the power density of the electric automobile drive motor is not lower than 5.7 kW/kg by 2025, the efficiency is not lower than 97%, and the index requirements are far higher than the index requirements of the power density of the electric automobile drive motor of 1.6 kW/kg and the efficiency of 95% in 2020. The power density of the existing induction motor and radial permanent magnet synchronous motor for driving the electric automobile almost reaches the limit, and the power density has no lifting space, and is far from the performance index requirement of the driving motor of the new generation of electric automobile. The axial magnetic field permanent magnet synchronous motor has the advantages of small volume, light weight, high power, high efficiency and the like, so that the electric automobile can be loaded with more batteries to improve the endurance mileage or save cabin space to increase the effective load ratio, and the axial magnetic field permanent magnet synchronous motor becomes a new generation of electric automobile driving motor with the highest competitive power. However, most of axial magnetic field permanent magnet motors adopt rotor permanent magnet structures, and have the following main problems: 1) The permanent magnets are arranged on the rotor which is not easy to radiate, and the high temperature can lead the permanent magnets to be demagnetized irreversibly, so that the performance of the motor is seriously affected; 2) In order to overcome the centrifugal force during high-speed operation, a fixing device is required to be arranged on the rotor.
In order to overcome the defects of the rotor permanent magnet type axial magnetic field permanent magnet motor, the prior art provides a magnetic flux switching type axial magnetic field permanent magnet motor scheme. Compared with a rotor permanent magnet type axial magnetic field permanent magnet motor, the magnetic flux switching type axial magnetic field permanent magnet motor has incomparable advantages in heat dissipation and high speed. However, the electromagnetic loads of the existing magnetic flux switching type axial magnetic field permanent magnet motor are all located on the stator, so that the electromagnetic load conflict is serious, and the torque density of the motor is restricted to be further improved. Therefore, in order to overcome the defects of the existing magnetic flux switching type axial magnetic field permanent magnet motor, a novel magnetic flux switching type axial magnetic field permanent magnet motor is developed, and the novel magnetic flux switching type axial magnetic field permanent magnet motor has important engineering application value for further improving the torque density of the motor.
Disclosure of Invention
The invention aims to provide a magnetic flux switching type axial magnetic field permanent magnet motor, wherein a permanent magnet and an armature winding of the magnetic flux switching type axial magnetic field permanent magnet motor are positioned on different stators, so that the degree of freedom of electromagnetic load design is increased, and the torque density of the motor is further improved.
The technical scheme of the invention is as follows: a magnetic flux switching type axial magnetic field permanent magnet motor comprises a permanent magnet stator A, a rotor A, an armature stator, a rotor B and a permanent magnet stator B which are coaxially and sequentially arranged along the axial direction; the permanent magnet stator A and the permanent magnet stator B comprise a permanent magnet stator iron core, a high coercivity permanent magnet and a permanent magnet stator bracket made of non-magnetic conductive materials; the rotor A and the rotor B comprise rotor iron cores and rotor supports made of non-magnetic conductive materials; the armature stator comprises an armature stator core, an armature winding and two armature stator brackets made of non-magnetic conductive materials.
Further, the permanent magnet stator support is of a circular ring disc structure, a plurality of permanent magnet stator grooves are uniformly formed in the permanent magnet stator support, the permanent magnet stator cores are uniformly distributed in the permanent magnet stator grooves along the circumferential direction, and the high-coercivity permanent magnets are embedded between two adjacent permanent magnet stator cores.
Further, the radial section of the permanent magnet stator core is fan-shaped, and the axial section of the permanent magnet stator core is H-shaped.
Further, the permanent magnet stator A and the permanent magnet stator B are identical and symmetrically arranged.
Further, the high-coercivity permanent magnet is made of NdFeB materials.
Further, the rotor support is of a circular ring disc-shaped structure, a plurality of rotor core grooves are uniformly formed in the rotor support along the circumferential direction, and the rotor cores are arranged in the rotor core grooves.
Further, the rotor A and the rotor B are identical and symmetrically arranged.
Further, the armature stator brackets are of circular ring disc structures, a plurality of armature stator grooves are uniformly formed in the two armature stator brackets, and the two side faces of the armature stator core are correspondingly embedded into the armature stator grooves of the two armature stator brackets.
Further, the armature stator core comprises stator yokes and stator teeth, the stator teeth face to the rotors at two sides and are correspondingly embedded into armature stator slots of the two armature stator brackets, and the armature windings adopt concentrated windings and are respectively wound on the stator yokes of the armature stators in a turn mode.
Further, the radial section of the armature stator core is fan-shaped and the axial section is H-shaped.
Compared with the prior art, the invention has the following advantages: the permanent magnet and the armature winding of the magnetic flux switching type axial magnetic field permanent magnet motor are positioned on different stators, so that the space conflict between electromagnetic loads of the existing magnetic flux switching type axial magnetic field permanent magnet motor is solved, the torque density of the motor is improved, and the armature stator, the permanent magnet stator and the rotor of the motor can be processed in a modularized manner, and the difficulty and the cost of a production and processing technology are reduced.
Drawings
FIG. 1 is an exploded view of the present invention;
fig. 2 is a stator core structure diagram of the permanent magnet stator a and the permanent magnet stator B of the present invention;
fig. 3 is a view showing a structure of an armature stator core according to the present invention;
fig. 4 is a view showing a structure of an armature stator core in which an armature winding is wound in an embedded manner according to the present invention;
in the figure: 1-permanent magnet stator A2-rotor A3-armature stator 4-rotor B5-permanent magnet stator B11-permanent magnet stator core 111-stator yoke 112-stator teeth 113-stator teeth 114-stator teeth 115-stator teeth 12-high coercivity permanent magnet 13-permanent magnet stator bracket 21-rotor core 22-rotor bracket 31-armature stator core 311-stator yoke 312-stator teeth 32-armature winding 33-armature stator bracket.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Referring to fig. 1 to 4
The magnetic flux switching type axial magnetic field permanent magnet motor comprises a permanent magnet stator A1, a rotor A2, an armature stator 3, a rotor B4 and a permanent magnet stator B5 which are coaxially and sequentially arranged along the axial direction, wherein the permanent magnet stator A and the permanent magnet stator B comprise a permanent magnet stator iron core 11, a high coercivity permanent magnet 12 and a permanent magnet stator bracket 13 made of a non-magnetic conductive material; the rotor A and the rotor B comprise a rotor core 21 and a rotor bracket 22 made of a non-magnetic conductive material; the armature stator includes an armature stator core 31, an armature winding 32, and two armature stator brackets 33 made of a non-magnetically conductive material.
In this embodiment, the radial section of the permanent magnet stator core is fan-shaped and the axial section is H-shaped, and the permanent magnet stator core includes a stator yoke 111, stator teeth 112, stator teeth 113, stator teeth 114 and stator teeth 115. Stator teeth 112 and 113 of the permanent magnet stator a positioned at one side face the rotor a; the stator teeth 112, 113 of the permanent magnet stator B on the other side face the rotor B.
In this embodiment, the permanent magnet stator support is in a circular disc structure, 24 permanent magnet stator slots are uniformly formed in the permanent magnet stator support, the permanent magnet stator cores are uniformly distributed in the permanent magnet stator slots along the circumferential direction, and the high-coercivity permanent magnet is embedded between two adjacent permanent magnet stator cores.
In this embodiment, the permanent magnet stator a and the permanent magnet stator B are identical and symmetrically arranged.
In this embodiment, the high coercivity permanent magnet is made of NdFeB material.
In this embodiment, the number of the high coercivity permanent magnets of the permanent magnet stator a and the permanent magnet stator B is 12 respectively.
In this embodiment, the rotor support is in a circular disc structure, and a plurality of rotor core slots are uniformly formed in the rotor support along the circumferential direction, and the rotor core is disposed in the rotor core slots.
In this embodiment, the rotor a and the rotor B are identical and symmetrically disposed.
In this embodiment, the armature stator brackets are all in a circular disc structure, and a plurality of armature stator slots are uniformly formed in the two armature stator brackets. The radial section of the armature stator core is fan-shaped, the axial section of the armature stator core is H-shaped, the armature stator core comprises a stator yoke 311 and stator teeth 312, the stator teeth face to rotors on two sides, and the stator teeth on two sides of the armature stator core are correspondingly embedded into armature stator slots of two armature stator brackets.
In this embodiment, the armature winding adopts concentrated windings and is wound on the stator yoke of the armature stator respectively.
In this embodiment, the number of armature stator cores of the armature stator is 12, that is, the number of stator teeth on both sides of the armature stator is 24, and the number of armature windings is 12.
The foregoing is only illustrative of the preferred embodiments of the present invention, and it will be apparent to those skilled in the art from this disclosure that, based upon the teachings herein, no inventive step is required to devise various arrangements of flux switching type axial field permanent magnet machines which, although not departing from the spirit and principles of the invention, embody the principles of the invention and are thus covered by the appended claims.
Claims (2)
1. The magnetic flux switching type axial magnetic field permanent magnet motor is characterized by comprising a permanent magnet stator A, a rotor A, an armature stator, a rotor B and a permanent magnet stator B which are coaxially and sequentially arranged along the axial direction; the permanent magnet stator A and the permanent magnet stator B comprise a permanent magnet stator iron core, a high coercivity permanent magnet and a permanent magnet stator bracket made of non-magnetic conductive materials; the rotor A and the rotor B comprise rotor iron cores and rotor supports made of non-magnetic conductive materials; the armature stator comprises an armature stator core, an armature winding and two armature stator brackets made of non-magnetic conductive materials; the permanent magnet stator support is of a circular disc structure, a plurality of permanent magnet stator grooves are uniformly formed in the permanent magnet stator support, the permanent magnet stator iron cores are uniformly distributed in the permanent magnet stator grooves along the circumferential direction, and the high-coercivity permanent magnet is embedded between two adjacent permanent magnet stator iron cores; the radial section of the permanent magnet stator core is fan-shaped, and the axial section of the permanent magnet stator core is H-shaped; the rotor support is of a circular disc structure, a plurality of rotor core grooves are uniformly formed in the rotor support along the circumferential direction, and the rotor cores are arranged in the rotor core grooves; the armature stator brackets are of circular ring disc structures, a plurality of armature stator slots are uniformly formed in the two armature stator brackets, and the two side faces of the armature stator iron core are correspondingly embedded into the armature stator slots of the two armature stator brackets; the permanent magnet stator A and the permanent magnet stator B are identical and symmetrically arranged; the rotor A and the rotor B are identical and symmetrically arranged; the armature stator iron core comprises stator yokes and stator teeth, the stator teeth face to the rotors at two sides and are correspondingly embedded into armature stator slots of the two armature stator brackets, and the armature windings adopt concentrated windings and are respectively wound on the stator yokes of the armature stators in a turn mode; the radial section of the armature stator core is fan-shaped, and the axial section of the armature stator core is H-shaped.
2. The flux switching axial field permanent magnet machine of claim 1, wherein the high coercivity permanent magnet is made of NdFeB material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011585595.3A CN112688515B (en) | 2020-12-29 | 2020-12-29 | Magnetic flux switching type axial magnetic field permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011585595.3A CN112688515B (en) | 2020-12-29 | 2020-12-29 | Magnetic flux switching type axial magnetic field permanent magnet motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112688515A CN112688515A (en) | 2021-04-20 |
| CN112688515B true CN112688515B (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011585595.3A Active CN112688515B (en) | 2020-12-29 | 2020-12-29 | Magnetic flux switching type axial magnetic field permanent magnet motor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949177A (en) * | 2021-09-22 | 2022-01-18 | 义乌吉利自动变速器有限公司 | Stator-rotor structure and axial magnetic field motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6762525B1 (en) * | 2002-04-30 | 2004-07-13 | Wavecrest Laboratories, Llc | Cascaded rotary electric motors having axial and radial air gaps |
| CN103199661A (en) * | 2013-04-25 | 2013-07-10 | 东南大学 | Built-in permanent magnet memory motor of magnetic flux switching type |
| CN104682641A (en) * | 2015-03-04 | 2015-06-03 | 广东威灵电机制造有限公司 | Double-stator axial magnetic field motor |
| CN105406669A (en) * | 2015-12-25 | 2016-03-16 | 华中科技大学 | Multi-air-gap axial magnetic flow-magnetic field modulation permanent magnet motor |
| CN111064333A (en) * | 2020-02-18 | 2020-04-24 | 福州大学 | Axial magnetic field flux switching permanent magnet motor with adjustable effective permanent magnet poles |
-
2020
- 2020-12-29 CN CN202011585595.3A patent/CN112688515B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6762525B1 (en) * | 2002-04-30 | 2004-07-13 | Wavecrest Laboratories, Llc | Cascaded rotary electric motors having axial and radial air gaps |
| CN103199661A (en) * | 2013-04-25 | 2013-07-10 | 东南大学 | Built-in permanent magnet memory motor of magnetic flux switching type |
| CN104682641A (en) * | 2015-03-04 | 2015-06-03 | 广东威灵电机制造有限公司 | Double-stator axial magnetic field motor |
| CN105406669A (en) * | 2015-12-25 | 2016-03-16 | 华中科技大学 | Multi-air-gap axial magnetic flow-magnetic field modulation permanent magnet motor |
| CN111064333A (en) * | 2020-02-18 | 2020-04-24 | 福州大学 | Axial magnetic field flux switching permanent magnet motor with adjustable effective permanent magnet poles |
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| CN112688515A (en) | 2021-04-20 |
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