CN108347113A - A kind of permanent magnetic brushless of bilayer combination magnetic pole - Google Patents
A kind of permanent magnetic brushless of bilayer combination magnetic pole Download PDFInfo
- Publication number
- CN108347113A CN108347113A CN201810315820.8A CN201810315820A CN108347113A CN 108347113 A CN108347113 A CN 108347113A CN 201810315820 A CN201810315820 A CN 201810315820A CN 108347113 A CN108347113 A CN 108347113A
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- Prior art keywords
- permanent magnetism
- angle
- magnetization
- lower layer
- permanent
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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
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a kind of permanent magnetic brushless of bilayer combination magnetic pole, including stator and rotor, rotor includes rotor core and rotor magnetic pole, rotor magnetic pole is made of upper layer and lower layer, include the permanent magnetism of one section of parallel magnetization, the permanent magnetism and one section of noseiron between two sections of permanent magnetism for including two sections of parallel magnetizations per pole lower layer per pole upper layer；The magnetization angle per two sections of permanent magnetism of pole lower layer is all acute angle, and the angle of magnetization of permanent magnetism is the angle of the direction of magnetization and circumference tangential direction clockwise at the permanent magnetism geometric center on the left of the lower layer of the poles N；The angle of magnetization of permanent magnetism is the angle of the direction of magnetization and counterclockwise circular tangential direction at the permanent magnetism geometric center on the right side of the lower layer of the poles N；The angle of magnetization of permanent magnetism is the angle of the direction of magnetization and counterclockwise circular tangential direction at the permanent magnetism geometric center on the left of the lower layer of the poles S；The angle of magnetization of permanent magnetism is the angle of the direction of magnetization and circumference tangential direction clockwise at the permanent magnetism geometric center on the right side of the lower layer of the poles S.The present invention not only reduces cost, and reduces torque pulsation.
Description
Technical field
The present invention relates to magneto technical fields, and in particular to a kind of permanent magnetic brushless of bilayer combination magnetic pole.
Background technology
Magneto has many advantages, such as efficient, small and high power density, in aerospace, national defence, traffic fortune
The fields such as defeated, industrial and agricultural production and public life are using very extensive.It is different according to the position in rotor residing for permanent magnetism, it can be divided into
Surface-mount type and interior permanent magnet machines.Bilayer combination magneto belongs to surface-mounted permanent magnet machine.
Chinese patent CN201510968871.7 discloses a kind of composite poles formula Surface Mount permanent magnet synchronous motor.The motor
Rotor be made of rare earth permanent magnet magnetic pole and two ferrite permanent-magnet magnetic poles per pole, the direction of magnetization is radial magnetizing, is magnetized
Direction is identical so that air gap flux density fundamental voltage amplitude increases, and reduces cost.
Invention content
The object of the invention is exactly in order to reduce the defect that torque pulsation is too big existing for traditional magnetic pole permanent magnet motor, to subtract
The small pulsation of electromagnetic torque, it thus provides a kind of permanent magnetic brushless of bilayer combination magnetic pole.
The present invention is achieved by the following technical solutions：
A kind of permanent magnetic brushless of bilayer combination magnetic pole, including stator and rotor, it is characterised in that：The rotor includes rotor
Iron core and rotor magnetic pole, the rotor magnetic pole are made of upper layer and lower layer, include the permanent magnetism of one section of parallel magnetization per pole upper layer, per pole
The permanent magnetism and one section of noseiron between two sections of permanent magnetism that lower layer includes two sections of parallel magnetizations, and two sections of permanent magnetism and noseiron are thick
It spends equal；The magnetization angle per two sections of permanent magnetism of pole lower layer is all acute angle, and the angle of magnetization of permanent magnetism is magnetization on the left of the lower layer of the poles N
The angle in direction and circumference tangential direction clockwise at the permanent magnetism geometric center；The angle of magnetization of permanent magnetism is magnetization on the right side of the lower layer of the poles N
The angle in direction and counterclockwise circular tangential direction at the permanent magnetism geometric center；The angle of magnetization of permanent magnetism is magnetization on the left of the lower layer of the poles S
The angle in direction and counterclockwise circular tangential direction at the permanent magnetism geometric center；The angle of magnetization of permanent magnetism is magnetization on the right side of the lower layer of the poles S
The angle in direction and circumference tangential direction clockwise at the permanent magnetism geometric center.
With identical structural parameters, using the conventional permanent magnet motor of parallel magnetization compared with, the beneficial effects of the present invention are：
The permanent magnetic brushless of the bilayer combination magnetic pole of the present invention, has part rotor iron core to subtract to reduce cost instead of permanent magnetism
Small torque pulsation, therefore the torque density and power density of such motor can be improved, it is equally applicable to external rotor electric machine.
Description of the drawings
Fig. 1 is the structural schematic diagram of traditional magnetic pole permanent magnet motor.
Fig. 2 is the structural schematic diagram of bilayer combination magnetic pole permanent magnet motor.
Fig. 3 is the structural schematic diagram of bilayer combination magnetic pole.
Fig. 4 is the slotless permanent magnet motor air gap magnetic density waveform of the slotless permanent magnet motor and traditional magnetic pole of bilayer combination magnetic pole
Comparison diagram.
Fig. 5 be bilayer combination magnetic pole have slot magneto and a traditional magnetic pole have slot Air-gap Flux Density in Permanent Magnet Machines waveform
Comparison diagram.
Fig. 6 is pair of the magneto and the magneto zero load induced electromotive force waveform of traditional magnetic pole of bilayer combination magnetic pole
Than figure.
Fig. 7 is the comparison diagram of the magneto and the magneto electromagnetic torque waveform of traditional magnetic pole of bilayer combination magnetic pole.
Specific implementation mode
Fig. 1 is the structural schematic diagram of traditional magnetic pole permanent magnet motor.Fig. 2 is the structural representation of bilayer combination magnetic pole permanent magnet motor
Figure.A kind of permanent magnetic brushless of bilayer combination magnetic pole, including stator and rotor, Fig. 1 with Fig. 2 stators are identical, including fixed
Sub- iron core 1 and stator winding, the difference is that rotor portion；Rotor includes rotor core and rotor magnetic pole, and Fig. 3 is rotor core 2
When radius is infinitely great, the structural schematic diagram of bilayer combination magnetic pole, the poles N upper layer permanent magnetism 3 all uses parallel with the poles S upper layer permanent magnetism 4
It magnetizes.Permanent magnetism 5 is parallel magnetization on the left of the lower layer of the poles N, and magnetization angle is the direction of magnetization and circumference clockwise at the permanent magnetism geometric center
The angle of tangential direction, rotor noseiron 6 are located between permanent magnetism 5,7, and permanent magnetism 5,7 is equal with 6 thickness of noseiron, on the right side of the lower layer of the poles N
Permanent magnetism 7 is parallel magnetization, and magnetization angle is the angle of the direction of magnetization and the permanent magnetism geometric center counterclockwise circular tangential direction；The poles S
Permanent magnetism 8 is parallel magnetization on the left of lower layer, and angle of magnetization is the direction of magnetization and the permanent magnetism geometric center counterclockwise circular tangential direction
Angle, rotor noseiron 9 is between permanent magnetism, and permanent magnetism 8,10 is equal with 9 thickness of noseiron, and permanent magnetism 10 is parallel on the right side of the lower layer of the poles S
It magnetizes, magnetization angle is the angle of the direction of magnetization and permanent magnetism geometric center circumference tangential direction clockwise.
It is compared followed by example motor.The motor rated power is 750W, rated speed 1900r/min.
The main structure parameters of the example motor are：6 slot, 4 pole, axial length 30mm, stator outer diameter 110mm, diameter of stator bore 60mm,
Rotor diameter is 59mm, and permanent magnet is using neodymium iron boron N30, and remanent magnetism 1.1T, permanent magnetism thickness is 3.6mm, and the stator is
Parallel teeth is 110 per phase winding turns-in-series.Stator core and rotor core are all made of 50W470 silicon steel sheets.Under example motor
The permanent magnetism of layer magnetic pole and the ratio of iron are 5:1, angle of magnetization is 45 degree.Therefore, with it is identical structural parameters, using parallel magnetization
Traditional magnetic pole permanent magnet motor is compared.Fig. 4 is the slotless permanent magnetism of the slotless permanent magnet motor and traditional magnetic pole of bilayer combination magnetic pole
The comparison diagram of motor gas-gap magnetic flux density waveforms.Fig. 5 be bilayer combination magnetic pole have slot magneto and a traditional magnetic pole have slot permanent magnetism
The comparison diagram of motor gas-gap magnetic flux density waveforms.Fig. 6 is that the magneto of the magneto and traditional magnetic pole of bilayer combination magnetic pole is unloaded
The comparison diagram of induced electromotive force waveform.Fig. 7 is that the magneto electromagnetism of the magneto and traditional magnetic pole of bilayer combination magnetic pole turns
The comparison diagram of rectangular waveform.It is obtained by FEM calculation, the average electromagnetic torque of traditional magnetic pole permanent magnet motor is 3.781m, torque
Pulsation is 0.91Nm, and the average electromagnetic torque of bilayer combination magnetic pole permanent magnet motor is 3.786Nm, torque pulsation 0.54Nm.From
And the average electromagnetic torque that can be seen that the motor torque and traditional magnetic pole permanent magnet motor of bilayer combination magnetic pole permanent magnet motor is basic
It is equal, but torque pulsation is reduced, vibration and the noise of motor are reduced, the performance of motor is improved, and has part rotor
Iron core is instead of permanent magnetism, to reduce cost.
Claims (2)
1. a kind of permanent magnetic brushless of bilayer combination magnetic pole, including stator and rotor, it is characterised in that：The rotor includes turning
Sub- iron core and rotor magnetic pole, the rotor magnetic pole are made of upper layer and lower layer, include the permanent magnetism of one section of parallel magnetization per pole upper layer, often
The permanent magnetism and one section of noseiron between two sections of permanent magnetism that pole lower layer includes two sections of parallel magnetizations, and two sections of permanent magnetism and noseiron
Thickness is equal；The magnetization angle per two sections of permanent magnetism of pole lower layer is all acute angle, and the angle of magnetization of permanent magnetism is magnetic on the left of the lower layer of the poles N
Change the angle in direction and circumference tangential direction clockwise at the permanent magnetism geometric center；The angle of magnetization of permanent magnetism is magnetic on the right side of the lower layer of the poles N
Change the angle in direction and counterclockwise circular tangential direction at the permanent magnetism geometric center；The angle of magnetization of permanent magnetism is magnetic on the left of the lower layer of the poles S
Change the angle in direction and counterclockwise circular tangential direction at the permanent magnetism geometric center；The angle of magnetization of permanent magnetism is magnetic on the right side of the lower layer of the poles S
Change the angle in direction and circumference tangential direction clockwise at the permanent magnetism geometric center.
2. the permanent magnetic brushless of bilayer combination magnetic pole according to claim 1, which is characterized in that the permanent magnet array
Noseiron and rotor core are an entirety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315820.8A CN108347113A (en) | 2018-04-10 | 2018-04-10 | A kind of permanent magnetic brushless of bilayer combination magnetic pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315820.8A CN108347113A (en) | 2018-04-10 | 2018-04-10 | A kind of permanent magnetic brushless of bilayer combination magnetic pole |
Publications (1)
| Publication Number | Publication Date |
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| CN108347113A true CN108347113A (en) | 2018-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810315820.8A Pending CN108347113A (en) | 2018-04-10 | 2018-04-10 | A kind of permanent magnetic brushless of bilayer combination magnetic pole |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556979A (en) * | 2019-09-05 | 2019-12-10 | 合肥工业大学 | Method for optimizing split ratio and magnetization angle of Halbach array permanent magnet motor |
| CN111327137A (en) * | 2020-04-07 | 2020-06-23 | 北京理工大学 | Outer rotor structure of generator |
| CN111342633A (en) * | 2020-04-07 | 2020-06-26 | 北京理工大学 | Three-phase power generation device with high-power-density outer rotor structure |
| CN111725925A (en) * | 2020-08-04 | 2020-09-29 | 珠海格力电器股份有限公司 | Single-phase permanent magnet self-starting motor and electric equipment with same |
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|---|---|---|---|---|
| CN101071960A (en) * | 2007-04-10 | 2007-11-14 | 沈阳工业大学 | Surface permanent magnetic servo motor rotor |
| JP2007312449A (en) * | 2006-05-16 | 2007-11-29 | Yaskawa Electric Corp | Periodic magnetic field generator and motor employing the same |
| WO2015082528A2 (en) * | 2013-12-06 | 2015-06-11 | Siemens Aktiengesellschaft | Rotor for an electric machine |
| CN105119454A (en) * | 2015-08-10 | 2015-12-02 | 郑永研 | Halbach array permanent magnet DC brushless motor |
| CN105305756A (en) * | 2015-11-30 | 2016-02-03 | 河南理工大学 | Salient-pole halbach composite permanent magnet rotation motor |
| CN107634631A (en) * | 2017-11-06 | 2018-01-26 | 合肥工业大学 | A kind of two-part Halbach magnetoes with optimal angle of magnetization |
-
2018
- 2018-04-10 CN CN201810315820.8A patent/CN108347113A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007312449A (en) * | 2006-05-16 | 2007-11-29 | Yaskawa Electric Corp | Periodic magnetic field generator and motor employing the same |
| CN101071960A (en) * | 2007-04-10 | 2007-11-14 | 沈阳工业大学 | Surface permanent magnetic servo motor rotor |
| WO2015082528A2 (en) * | 2013-12-06 | 2015-06-11 | Siemens Aktiengesellschaft | Rotor for an electric machine |
| CN105119454A (en) * | 2015-08-10 | 2015-12-02 | 郑永研 | Halbach array permanent magnet DC brushless motor |
| CN105305756A (en) * | 2015-11-30 | 2016-02-03 | 河南理工大学 | Salient-pole halbach composite permanent magnet rotation motor |
| CN107634631A (en) * | 2017-11-06 | 2018-01-26 | 合肥工业大学 | A kind of two-part Halbach magnetoes with optimal angle of magnetization |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556979A (en) * | 2019-09-05 | 2019-12-10 | 合肥工业大学 | Method for optimizing split ratio and magnetization angle of Halbach array permanent magnet motor |
| CN111327137A (en) * | 2020-04-07 | 2020-06-23 | 北京理工大学 | Outer rotor structure of generator |
| CN111342633A (en) * | 2020-04-07 | 2020-06-26 | 北京理工大学 | Three-phase power generation device with high-power-density outer rotor structure |
| CN111327137B (en) * | 2020-04-07 | 2021-09-07 | 北京理工大学 | Outer rotor structure of generator |
| CN111725925A (en) * | 2020-08-04 | 2020-09-29 | 珠海格力电器股份有限公司 | Single-phase permanent magnet self-starting motor and electric equipment with same |
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Application publication date: 20180731 |
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