CN109586440B - Five-phase permanent magnet motor based on combined Halbach permanent magnet array - Google Patents
Five-phase permanent magnet motor based on combined Halbach permanent magnet array Download PDFInfo
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- CN109586440B CN109586440B CN201811323361.4A CN201811323361A CN109586440B CN 109586440 B CN109586440 B CN 109586440B CN 201811323361 A CN201811323361 A CN 201811323361A CN 109586440 B CN109586440 B CN 109586440B
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- permanent magnet
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- halbach
- magnet array
- halbach permanent
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- 238000004804 winding Methods 0.000 claims abstract description 21
- 238000003491 array Methods 0.000 claims abstract description 11
- 230000004907 flux Effects 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 4
- 239000002356 single layer Substances 0.000 claims description 2
- 239000000696 magnetic material Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Linear Motors (AREA)
Abstract
The invention discloses a five-phase permanent magnet motor based on a combined Halbach permanent magnet array, which comprises a stator core, a rotor core, a rotating shaft, a five-phase winding and a plurality of combined Halbach permanent magnet arrays, wherein the five-phase winding is arranged in a groove of the stator core, each combined Halbach permanent magnet array is respectively used as an N-pole magnetic pole or an S-pole magnetic pole, each combined Halbach permanent magnet array is sequentially adhered to the surface of the rotor core, and each combined Halbach permanent magnet array consists of two traditional segmented Halbach permanent magnet arrays. The Halbach array permanent magnet rotor can solve the problem that the torque of the motor is difficult to improve by injecting third harmonic current into the existing Halbach array permanent magnet rotor.
Description
Technical Field
The invention belongs to the technical field of permanent magnet motors, and particularly relates to a five-phase permanent magnet motor based on a combined Halbach permanent magnet array.
Background
The five-phase permanent magnet motor has the characteristics of high torque density, high efficiency, low torque ripple, low requirement on the capacity of a power device, strong fault-tolerant capability and the like, and is widely applied to occasions with high requirements on the power density and the fault-tolerant capability of the motor, particularly military industrial fields such as aviation, aerospace, navigation and the like and civil fields such as electric automobiles and the like along with the rapid development of an advanced electromagnetic design theory, a digital control technology and a power electronic technology.
The Halbach permanent magnet array structure is a novel structure which appears in recent years and aims to reduce torque ripple and iron loss, and is widely applied to a five-phase motor, however, the approximately sinusoidal air gap flux density of a Halbach permanent magnet array rotor enables the counter electromotive force of third harmonic generated in a motor winding to be relatively small, and the effect of injecting third harmonic current to improve the motor torque is limited.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a five-phase permanent magnet motor based on a combined Halbach permanent magnet array, which can obviously improve the torque of the motor by injecting third harmonic current.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a five-phase permanent magnet motor based on a combined Halbach permanent magnet array comprises a stator core, a rotor core, a rotating shaft, a five-phase winding and a plurality of combined Halbach permanent magnet arrays, wherein the five-phase winding is placed in a groove of the stator core, each combined Halbach permanent magnet array is used as an N-pole magnetic pole or an S-pole magnetic pole, each combined Halbach permanent magnet array is sequentially adhered to the surface of the rotor core, and each combined Halbach permanent magnet array is composed of two traditional segmented Halbach permanent magnet arrays.
Based on the preferable scheme of the technical scheme, the number of the permanent magnet blocks of the combined Halbach permanent magnet array meets the following requirements:
k＝2m-1
in the above formula, k is the number of permanent magnet blocks of the combined Halbach permanent magnet array, m is the number of permanent magnet blocks of a segmented Halbach permanent magnet array, and m is more than or equal to 2.
Based on the preferable scheme of the technical scheme, the combined Halbach permanent magnet arrays are alternately arranged on the surface of the rotor core by N-pole magnetic poles and S-pole magnetic poles.
Based on the preferable scheme of the technical scheme, the five-phase winding is a single-layer winding, a double-layer winding or a single-double-layer winding; the five-phase windings are connected in a star connection mode, a pentagonal connection mode or a pentagonal connection mode.
Based on the preferable scheme of the technical scheme, the stator iron core and the rotor iron core are made of magnetic conductive materials, and the rotating shaft is made of non-magnetic conductive materials.
Based on the preferable scheme of the technical scheme, the five-phase permanent magnet motor based on the combined Halbach permanent magnet array is used for realizing a motor.
Adopt the beneficial effect that above-mentioned technical scheme brought:
(1) the combined Halbach permanent magnet array magnetic pole consists of two traditional segmented Halbach permanent magnet arrays, can generate saddle-shaped air gap flux density in an air gap and can increase the air gap flux density of fundamental waves and third harmonic waves, so that the counter potential of the fundamental waves and the counter potential of the third harmonic waves are improved, and the output torque is improved through the interaction of fundamental wave current and third harmonic wave current injected into a winding;
(2) the combined Halbach permanent magnet array magnetic pole is adopted, the number of the permanent magnet blocks under one magnetic pole is increased, the eddy current loss of the permanent magnet can be effectively reduced, and the irreversible demagnetization of the permanent magnet caused by overhigh temperature is avoided.
Drawings
FIG. 1 is an evolution schematic diagram of a combined Halbach permanent magnet array magnetic pole of a five-phase permanent magnet motor combined with a Halbach permanent magnet array according to the invention;
FIG. 2 is a schematic structural diagram of a five-phase permanent magnet motor based on a combined Halbach permanent magnet array according to the invention; the reference numerals in fig. 2 illustrate: 1. a stator core; 2. five-phase winding; 3. a rotor core; 4. a rotating shaft; 5. combining a Halbach permanent magnet array;
FIG. 3 is a magnetic density diagram of the air gap of a conventional Halbach permanent magnet array and a combined Halbach permanent magnet array;
FIG. 4 is a graph of air gap flux density harmonics for a conventional Halbach permanent magnet array and a combined Halbach permanent magnet array;
FIG. 5 is a graph of the output torque of the present invention with and without injection of the third harmonic at constant amplitude current.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
Fig. 1 is a schematic diagram showing the evolution of a combined Halbach permanent magnet array magnetic pole of a five-phase permanent magnet motor combined with a Halbach permanent magnet array according to the present invention, in this embodiment, a conventional three-stage Halbach permanent magnet array is selected for illustration, one combined Halbach permanent magnet array is formed by combining two conventional three-stage Halbach permanent magnet arrays (A, B, a1, and B1), the air gap flux density generated by the single conventional three-stage Halbach permanent magnet array is approximately sinusoidal, and the combined permanent magnet array can generate an approximately saddle-shaped air gap flux density. The combined Halbach permanent magnet array evolved from two traditional three-section Halbach permanent magnet arrays consists of 5 permanent magnets, the number of blocks of the Halbach permanent magnet array evolved from the traditional Halbach permanent magnet arrays with other numbers of blocks meets the condition that k is 2m-1, m in the formula is the number of the permanent magnet blocks of the traditional subsection Halbach permanent magnet array, and m is more than or equal to 2.
Fig. 2 is a schematic structural view of a five-phase permanent magnet motor with a combined Halbach permanent magnet array according to the present invention, wherein a rotor includes N poles and S poles formed by the combined Halbach permanent magnet array, a rotor core and a rotating shaft, and a stator includes a stator core and a stator winding (five-phase winding). The winding connection form and the pole slot matching of the five-phase permanent magnet motor combined with the Halbach permanent magnet array can be adjusted according to requirements. It should be noted that there may be a gap or no gap between the adjacent N-pole magnetic pole and S-pole magnetic pole, and fig. 2 shows a structure without a gap.
Fig. 3 is a gas-gap density diagram of a conventional Halbach permanent magnet array and a combined Halbach permanent magnet array, and fig. 4 is a gas-gap density harmonic diagram of the conventional Halbach permanent magnet array and the combined Halbach permanent magnet array. It can be seen intuitively that the middle of the air gap flux density waveform generated by the five-phase permanent magnet motor combined with the Halbach permanent magnet array is obviously concave, the fundamental wave and third harmonic air gap flux density after Fourier decomposition are increased compared with the traditional structure, and particularly the third harmonic component is obviously increased.
Fig. 5 shows the output torques with and without injection of the third harmonic at constant amplitude current, and the five-phase permanent magnet motor combined with the Halbach permanent magnet array has output average torques of 4.42Nm and 5.24Nm at constant amplitude current with and without injection of the third harmonic current, and the torque is increased by 18.55%.
The embodiments are only for illustrating the technical idea of the present invention, and the technical idea of the present invention is not limited thereto, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the scope of the present invention.
Claims (6)
1. The utility model provides a five looks permanent-magnet machine based on make up Halbach permanent-magnet array which characterized in that: the five-phase winding is placed in a groove of the stator core, each combined Halbach permanent magnet array is respectively used as an N-pole magnetic pole or an S-pole magnetic pole, each combined Halbach permanent magnet array is sequentially pasted on the surface of the rotor core, and each combined Halbach permanent magnet array consists of two traditional segmented Halbach permanent magnet arrays; the air gap flux density generated by the traditional segmented Halbach permanent magnet array is approximate to a sine shape, and the air gap flux density generated by the combined Halbach permanent magnet array is approximate to a saddle shape.
2. The combined Halbach permanent magnet array-based five-phase permanent magnet machine of claim 1, wherein: the number of the permanent magnet blocks of the combined Halbach permanent magnet array meets the following requirements:
k＝2m-1
in the above formula, k is the number of permanent magnet blocks of the combined Halbach permanent magnet array, m is the number of permanent magnet blocks of a segmented Halbach permanent magnet array, and m is more than or equal to 2.
3. The five-phase permanent magnet machine based on the combined Halbach permanent magnet array according to claim 1 or 2, characterized in that: and the combined Halbach permanent magnet arrays are alternately arranged on the surface of the rotor core by N-pole magnetic poles and S-pole magnetic poles.
4. The combined Halbach permanent magnet array-based five-phase permanent magnet machine of claim 1, wherein: the five-phase winding is a single-layer winding, a double-layer winding or a single-double-layer winding; the five-phase windings are connected in a star connection mode, a pentagonal connection mode or a pentagonal connection mode.
5. The combined Halbach permanent magnet array-based five-phase permanent magnet machine of claim 1, wherein: the stator iron core and the rotor iron core are made of magnetic materials, and the rotating shaft is made of non-magnetic materials.
6. The combined Halbach permanent magnet array-based five-phase permanent magnet machine of claim 1, wherein: the five-phase permanent magnet motor based on the combined Halbach permanent magnet array is used for realizing a motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323361.4A CN109586440B (en) | 2018-11-08 | 2018-11-08 | Five-phase permanent magnet motor based on combined Halbach permanent magnet array |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323361.4A CN109586440B (en) | 2018-11-08 | 2018-11-08 | Five-phase permanent magnet motor based on combined Halbach permanent magnet array |
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| Publication Number | Publication Date |
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| CN109586440A CN109586440A (en) | 2019-04-05 |
| CN109586440B true CN109586440B (en) | 2020-09-15 |
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| CN201811323361.4A Active CN109586440B (en) | 2018-11-08 | 2018-11-08 | Five-phase permanent magnet motor based on combined Halbach permanent magnet array |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111682668B (en) * | 2020-05-26 | 2021-08-03 | 东南大学溧阳研究院 | Fractional slot brushless permanent magnet motor rotor yoke with inclined slots and slot size determining method |
| WO2023048221A1 (en) * | 2021-09-27 | 2023-03-30 | 株式会社デンソー | Rotary electrical machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007221911A (en) * | 2006-02-16 | 2007-08-30 | Asmo Co Ltd | Rotor and motor |
| JP2011147346A (en) * | 2011-05-02 | 2011-07-28 | Mitsubishi Electric Corp | Electric motor |
| WO2015082528A2 (en) * | 2013-12-06 | 2015-06-11 | Siemens Aktiengesellschaft | Rotor for an electric machine |
| CN205583971U (en) * | 2016-04-25 | 2016-09-14 | 深圳市科卫泰实业发展有限公司 | Coreless motor |
| JP2018092988A (en) * | 2016-11-30 | 2018-06-14 | 橘コンサルタンツ株式会社 | Multiple magnetization unit permanent magnet, manufacturing method thereof, mold, and magnetic circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166406B (en) * | 2011-12-09 | 2015-02-18 | 同济大学 | High-power-density high-efficiency permanent magnet synchronous motor used for vehicle |
| CN102983649B (en) * | 2012-12-25 | 2015-06-17 | 南车株洲电机有限公司 | Permanent-magnet wind power generator rotor and permanent-magnet wind power generator |
| CN106712338B (en) * | 2017-01-17 | 2019-04-16 | 河海大学 | High weak magnetic property Halbach array permanent magnet synchronous motor |
| CN107634631B (en) * | 2017-11-06 | 2019-07-26 | 合肥工业大学 | A kind of two-part Halbach magneto with optimal angle of magnetization |
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2018
- 2018-11-08 CN CN201811323361.4A patent/CN109586440B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007221911A (en) * | 2006-02-16 | 2007-08-30 | Asmo Co Ltd | Rotor and motor |
| JP2011147346A (en) * | 2011-05-02 | 2011-07-28 | Mitsubishi Electric Corp | Electric motor |
| WO2015082528A2 (en) * | 2013-12-06 | 2015-06-11 | Siemens Aktiengesellschaft | Rotor for an electric machine |
| CN205583971U (en) * | 2016-04-25 | 2016-09-14 | 深圳市科卫泰实业发展有限公司 | Coreless motor |
| JP2018092988A (en) * | 2016-11-30 | 2018-06-14 | 橘コンサルタンツ株式会社 | Multiple magnetization unit permanent magnet, manufacturing method thereof, mold, and magnetic circuit |
Non-Patent Citations (2)
| Title |
|---|
| 永磁同步电机转子磁极优化技术综述;王凯;《中国电机工程学报》;20171220;正文 * |
| 电动汽车用双层永磁体IPMSM优化分析;刘细平;《电机与控制学报》;20171031;正文 * |
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