CN107124053A - A kind of Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet - Google Patents

A kind of Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet Download PDF

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Publication number
CN107124053A
CN107124053A CN201710388163.5A CN201710388163A CN107124053A CN 107124053 A CN107124053 A CN 107124053A CN 201710388163 A CN201710388163 A CN 201710388163A CN 107124053 A CN107124053 A CN 107124053A
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China
Prior art keywords
permanent magnet
rotor
core section
magnet
rotor core
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CN201710388163.5A
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CN107124053B (en
Inventor
王凯
李健
吴科明
刘闯
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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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
    • H02K1/2746—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 arranged with the same polarity, e.g. consequent pole type
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • 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
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • 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
    • H02K1/2786—Outer rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Abstract

The invention discloses a kind of Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet, including rotor core section, magnetic guiding loop, high-energy-density permanent magnet and low energy densities permanent magnet, a magnetic guiding loop is coaxially disposed between two neighboring rotor core section；Consequent pole permanent magnet motor rotor can also be used as outer rotor as internal rotor.The outer surface of each rotor core section or inner surface are circumferentially uniformly laid with the outer salient pole of p arc, wherein, p is motor number of pole-pairs；Formed between two neighboring outer salient pole and a high-energy-density permanent magnet is laid in an outer arcuate groove, each outer arcuate groove；N arc groove, and n >=p are circumferentially uniformly laid with the inner or outer side anchor ring of each rotor core section；A low energy densities permanent magnet is laid in each arc groove.The present invention can further improve the torque output capability of alternately pole surface permanent magnetic motor while saving motor cost and weakening alternately pole surface permanent magnetic machine shaft leakage field.

Description

A kind of Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet
Technical field
The present invention relates to design of electrical motor field, particularly a kind of Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet.
Background technology
Magneto has high torque density and high efficiency, has been widely used for medicine equipment, household electrical appliance, electronic vapour The fields such as car, wind-power electricity generation and Aero-Space.Different rotor structure for permanent magnet motor so that magnetic circuit is different, and this allows for motor Performance, control system, manufacturing process and applicable situation are also different.Theoretical, the surface-type according to the coordinate transform of permagnetic synchronous motor The d-axis magnetic circuit and quadrature axis magnetic circuit of magneto.D-axis magnetic circuit：Permanent magnet → air gap → stator core → air gap → adjacent is forever Magnet → rotor core → returns to permanent magnet.(stator core and air gap are not drawn in figure, but are both known about in industry).Quadrature axis Magnetic circuit：Boundary → rotor of two permanent magnets of boundary → air gap → stator core → air gap of two permanent magnets → adjacent It is unshakable in one's determination → to return to the boundary for starting two permanent magnets.
It can be seen that, the magnetic resistance of its d-axis magnetic circuit is equal with the magnetic resistance of quadrature axis magnetic circuit, so its d-axis inductance is equal to quadrature axis inductance.
The electromagnetic torque T of permagnetic synchronous motoreExpression formula, as shown in formula (a).
In formula (a), p is the number of pole-pairs of motor, ψpmFor permanent magnet flux linkage, LdAnd LqRespectively d-axis inductance and quadrature axis inductance, id And iqThe respectively direct-axis current and quadrature axis current of armature winding.IaIt is the peak value of sinusoidal phase current, β is current phase angle.Tpm And TrIt is permanent-magnet torque component and reluctance torque component respectively.
Because the d-axis inductance of surface permanent magnetic motor is equal to quadrature axis inductance, so its reluctance torque component is 0.Comprise only The electromagnetic torque T of permanent-magnet torque component, i.e. surface permanent magnetic motoreExpression formula, can be by formula (b) Suo Shi.
The manufacturing process of surface permanent magnetic rotor is simple, reluctance torque component is not contained in its output torque, therefore control Method processed is simple, is widely used in the servo drive occasion such as lathe, robot and medicine equipment.Traditional surface permanent magnetic motor It is the higher main cause of its production cost using the higher rare earth permanent-magnetic material of a large amount of prices.In order to reduce its cost, application Number for 200710010915.0 patent of invention there is provided a kind of surface permanent magnetic servo motor rotor, permanent magnet and " false pole " It is alternately arranged, the quantity of permanent magnet is only the half of conventional surface formula magneto, saves permanent-magnet material, so as to reduce electricity The totle drilling cost of machine.
However, the article delivered as IEEE magnetics proceedings：Comparative Analysis of End Effect in Partitioned Stator Flux Reversal Machines Having Surface-Mounted and Consequent Pole Permanent Magnets, pointed, the magneto of alternating pole structure, its brow leakage ratio It is more serious.
In addition, alternately the roller end of pole surface permanent magnetic motor has unipolarity leakage field so that the roller end of motor Magnetize, this will produce influence to the reliability of whole electric system and security.Patent of invention 201611011019.1 is carried Go out the method using rotor segment, provide leakage path inside rotor and rotating shaft, weaken the magnetization of roller end.However, The leakage field of two-stage rotor intersection can reduce torque output capability, and the utilization rate of permanent magnet is relatively low.
The content of the invention
In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide one kind uses hybrid permanent magnet The Consequent pole permanent magnet motor rotor of body, this using hybrid permanent-magnet Consequent pole permanent magnet motor rotor can save motor cost and While weakening alternately pole surface permanent magnetic machine shaft leakage field, the torque for further improving alternately pole surface permanent magnetic motor is defeated Output capacity.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet, including rotor core section, magnetic guiding loop, high-energy are close Spend permanent magnet and low energy densities permanent magnet.
Rotor core section at least two, and be coaxially disposed；One is coaxially disposed between two neighboring rotor core section Magnetic guiding loop.
Consequent pole permanent magnet motor rotor can also be used as outer rotor as internal rotor.
When Consequent pole permanent magnet motor rotor is as internal rotor, laying mode includes.
1) rotor core section and the equal coaxial package of magnetic guiding loop are in rotating shaft.
2) outer surface of each rotor core section is circumferentially uniformly laid with the outer salient pole of p arc, wherein, p is motor Number of pole-pairs；Formed between two neighboring outer salient pole and an outer tile type permanent magnetism is laid in an outer arcuate groove, each outer arcuate groove Body, each outer tile type permanent magnet is high-energy-density permanent magnet.
3) n arc groove, and n >=p are circumferentially uniformly laid with the inner side anchor ring of each rotor core section；Each The rotor core section that the internal diameter of arc groove is all higher than between the internal diameter of rotor core section, two neighboring arc groove adds in constituting Strengthening tendons；Lay an interior tile type permanent magnet in each arc groove, it is each in tile type permanent magnet be low energy densities forever Magnet.
When Consequent pole permanent magnet motor rotor is as outer rotor, laying mode includes.
(1) n outer arcuate groove, and n >=p are circumferentially uniformly laid with the outer annular face of each rotor core section；Often The rotor core section that the external diameter of individual outer arcuate groove is respectively less than between the external diameter of rotor core section, two neighboring outer arcuate groove constitutes outer Reinforcement；An outer tile type permanent magnet is laid in each outer arcuate groove, each outer tile type permanent magnet is low energy densities Permanent magnet；
(2) inner surface of each rotor core section is circumferentially uniformly laid with the interior salient pole of p arc, two neighboring interior Formed between salient pole and an interior tile type permanent magnet is laid in an arc groove, each arc groove, each interior tile type is forever Magnet is high-energy-density permanent magnet.
Consequent pole permanent magnet motor rotor also has following laying mode no matter as internal rotor, or as outer rotor.
The electric cycle angle that high-energy-density permanent magnet in two neighboring rotor core section is circumferentially offset for 360 °/ 2p。
The magnetizing direction of all outer tile type permanent magnets in same rotor core section is consistent, positioned at same turn The magnetizing direction of all interior tile type permanent magnets on sub- stack of lamination is consistent, the outer tile type in same rotor core section The magnetizing direction of permanent magnet and interior tile type permanent magnet is opposite.
The magnetizing direction of outer tile type permanent magnet in two neighboring rotor core section is opposite；Two neighboring rotor core section On interior tile type permanent magnet magnetizing direction it is opposite.
The both sides of each outer tile type permanent magnet and each interior tile type permanent magnet are provided with magnet isolation tank.
The coefficient of the magnet isolation tank of high-energy-density permanent magnet both sidesWherein θb1For high-energy-density permanent magnet The central angle of the magnet isolation tank of both sides, θm1For the central angle of high-energy-density permanent magnet；kc1Span is 0-0.2.
The coefficient of the magnet isolation tank of low energy densities permanent magnet both sidesWherein θb2For low energy densities permanent magnet The central angle of the magnet isolation tank of both sides, kc2Span is between 0-0.2.
The periphery of magnetic guiding loop or inner circumferential coaxial sleeve are provided with axial charging permanent magnet；Assuming that the external diameter of axial charging permanent magnet is R1, the external diameter of high-energy-density permanent magnet is r3, and the internal diameter of high-energy-density permanent magnet is r4, then r3≤r1≤r4.
Magnetizing direction positioned at two axial charging permanent magnets of same rotor core section both sides is opposite.
The axial length coefficient of magnetic guiding loopWherein LaFor the axial length of magnetic guiding loop, LefFor motor complete machine Effective axial length；kaSpan is 0-0.1.
The pole embrace α of high-energy-density permanent magnetp1=θm1P/ (2 π), wherein θm1For the circle of high-energy-density permanent magnet Heart angle, αp1Span is 0.35-0.75.
The pole embrace α of low energy densities permanent magnetp2=θm2N/ (2 π), wherein n are the individual of low energy densities permanent magnet trough Number, θm2For the central angle of low energy densities permanent magnet, αp2Span is 0.7-0.99.
High-energy-density permanent magnet is neodymium iron boron, and low energy densities permanent magnet is ferrite.
The present invention can save motor cost and weaken alternately pole surface permanent magnetic machine shaft leakage using after said structure While magnetic, the torque output capability of alternately pole surface permanent magnetic motor is further improved.
Brief description of the drawings
Fig. 1 shows the present invention as the two-dimensional structure schematic diagram of rotor core section during internal rotor.
Fig. 2 permanent magnet magnetizing direction two dimension signals in two neighboring rotor core section when showing the present invention as internal rotor Figure.
Fig. 3 show the present invention as internal rotor and without axial charging permanent magnet when three dimensional structure diagram.
Fig. 4 shows the present invention as roller end leakage field magnetic flux path figure during internal rotor.
Fig. 5 shows the present invention as the main flux path profile of low energy densities permanent magnet during internal rotor.
Three dimensional structure diagram when Fig. 6 shows the present invention as internal rotor and containing axial charging permanent magnet.
Fig. 7 permanent magnet magnetizing direction two dimension signals in two neighboring rotor core section when showing the present invention as outer rotor Figure.
Fig. 8 shows the present invention as three dimensional structure diagram during outer rotor.
Fig. 9 shows the present invention and the electromagnetic torque contrast (half of electric cycle) of prior art motor.
Wherein have：
10. rotor core section；11. outer salient pole；12. outer arcuate groove；13. in reinforcement；14. arc groove；15. every magnetic Groove；16. in salient pole；17. external reinforcing ribs；
21. high-energy-density permanent magnet；22. low energy densities permanent magnet；
30. magnetic guiding loop；31. axial charging permanent magnet；
40. rotating shaft；50. roller end leakage field magnetic flux path；60. main flux path.
Embodiment
The present invention is further detailed explanation with specific better embodiment below in conjunction with the accompanying drawings.
Exemplified by the present invention is with 10 pole motors (5 pairs of poles, i.e. p=5), respectively individually to be said as internal rotor and outer rotor It is bright.
First, Consequent pole permanent magnet motor rotor is used as internal rotor
As shown in Figures 1 to 6, a kind of Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet, including rotor core section 10th, magnetic guiding loop 30, high-energy-density permanent magnet 21 and low energy densities permanent magnet 22.
High-energy-density permanent magnet is preferably neodymium iron boron, and low energy densities permanent magnet is preferably ferrite.
A magnetic guiding loop is coaxially disposed between rotor core section at least two, two neighboring rotor core section.
It will be described in detail in the present invention by taking two rotor core sections as an example, magnetic guiding loop will be 1.Two rotor cores Section and an equal coaxial package of magnetic guiding loop are in rotating shaft.
The outer surface of each rotor core section is circumferentially uniformly laid with the outer salient pole of p arc, wherein, p is motor pole P=5 in logarithm, the present invention.
Formed between two neighboring outer salient pole and an outer tile type permanent magnetism is laid in an outer arcuate groove, each outer arcuate groove Body, each outer tile type permanent magnet is high-energy-density permanent magnet.
N arc groove, and n >=p are circumferentially uniformly laid with the inner side anchor ring of each rotor core section, the present invention In, preferably n=5.
The internal diameter of each arc groove is all higher than the internal diameter of rotor core section.
Rotor core section between two neighboring arc groove constitutes interior reinforcement 13；One is laid in each arc groove Interior tile type permanent magnet, each interior tile type permanent magnet is low energy densities permanent magnet.
Outer tile type permanent magnet (namely high-energy-density permanent magnet) in two neighboring rotor core section is circumferentially offset Electric cycle angle be 360 °/2p, the present invention be preferably 36 °.
As shown in Fig. 2 the magnetizing direction of all outer tile type permanent magnets in same rotor core section is consistent, position It is consistent in the magnetizing direction of all interior tile type permanent magnets in same rotor core section, in same rotor core section Outer tile type permanent magnet and interior tile type permanent magnet magnetizing direction it is opposite.
The magnetizing direction of outer tile type permanent magnet in two neighboring rotor core section is opposite；Two neighboring rotor core section On interior tile type permanent magnet magnetizing direction it is opposite.
The both sides of each outer tile type permanent magnet and each interior tile type permanent magnet are provided with magnet isolation tank 15.
The coefficient of the magnet isolation tank of outer tile type permanent magnet both sidesWherein θb1For outer tile type permanent magnet both sides Magnet isolation tank central angle, θm1For the central angle of outer tile type permanent magnet；kc1Span is 0-0.2.
The coefficient of the magnet isolation tank of interior tile type permanent magnet both sidesWherein θb2For interior tile type permanent magnet both sides Magnet isolation tank central angle, kc2Span is between 0-0.2.
The periphery coaxial sleeve of magnetic guiding loop is provided with axial charging permanent magnet 31, and axial charging permanent magnet 31 both can be high-energy It is preferably high-energy-density permanent magnet in density permanent magnet or low energy densities permanent magnet, the present invention.
As shown in figure 9, the setting of axial charging permanent magnet 31, can greatly improve the torque output energy of Consequent pole permanent magnet motor Power.
Assuming that the external diameter of axial charging permanent magnet is r1, the external diameter of high-energy-density permanent magnet is r3, and high-energy-density is forever The internal diameter of magnet is r4, then r3≤r1≤r4.
Magnetizing direction positioned at two axial charging permanent magnets of same rotor core section both sides is opposite.
The axial length coefficient of magnetic guiding loopWherein LaFor the axial length of magnetic guiding loop, LefFor motor complete machine Effective axial length, that is, all rotor core axial lengths add the axial length of magnetic guiding loop；kaSpan is 0-0.1.
The pole embrace α of outer tile type permanent magnetp1=θm1P/ (2 π), wherein θm1For the central angle of outer tile type permanent magnet, αp1Span is 0.35-0.75.
The pole embrace α of interior tile type permanent magnetp2=θm2N/ (2 π), wherein n are the number of interior tile type permanent magnet trough, θm2For the central angle of interior tile type permanent magnet, αp2Span is 0.7-0.99.
Arc groove is provided with the inside of Consequent pole permanent magnet motor, for placing low energy densities permanent magnet.Due to interior The presence of deep-slotted chip breaker, beyond tile type permanent magnet pass through the leakage field of roller end magnetic flux path in magnetic resistance become big, therefore The leakage field of the roller end produced by outer tile type permanent magnet is reduced, roller end leakage field magnetic flux path 50 as shown in Figure 4. Because interior tile type permanent magnet is also magnetized using unipolarity, so the magnetizing direction phase of adjacent two sections of low energy densities permanent magnet Instead, such magnetic circuit can pass through stator core, two-stage rotor loop unshakable in one's determination and magnetic guiding loop composition closure：Tile type is forever in one section Tile type permanent magnet → magnetic conduction in the outer salient pole of magnet → outer salient pole → air gap → stator core → air gap → another section → another section The interior tile type permanent magnet of ring → return to beginning, the main flux path 60 of interior tile type permanent magnet as shown in Figure 5.Exactly because The main flux path of interior tile type permanent magnet is closed by magnetic guiding loop, its roller end leakage field very little produced.In addition, interior tile Formula permanent magnet can further increase the main flux of motor, so as to improve the torque output capability of Consequent pole permanent magnet motor.Such as Fig. 9 Shown, electromagnetic torque of the invention is far above the electromagnetic torque in background technology 201611011019.1.
2nd, Consequent pole permanent magnet motor rotor is used as outer rotor
As shown in Figure 7 and Figure 8, a kind of Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet, also including rotor core Section 10, magnetic guiding loop 30, high-energy-density permanent magnet 21 and low energy densities permanent magnet 22.
A magnetic guiding loop is coaxially disposed between rotor core section at least two, two neighboring rotor core section.
It will be described in detail in the present invention by taking two rotor core sections as an example, magnetic guiding loop will be 1.
Stator is coaxially fixedly set in the periphery of fixing axle, and both form as one structure；Fixing axle two ends are respectively from fixed Sub- two ends are stretched out, and two external parts of fixing axle are respectively set with a bearing.
Two rotor core sections and a magnetic guiding loop are coaxially set in stator periphery, and are co-axially mounted by supporter On bearing.
The inner surface of each rotor core section is circumferentially uniformly laid with preferably p in the interior salient pole of p arc, the present invention =5.
Formed between two neighboring interior salient pole and an interior tile type permanent magnetism is laid in an arc groove, each arc groove Body, each interior tile type permanent magnet is high-energy-density permanent magnet.
N outer arcuate groove, and n >=p are circumferentially uniformly laid with the outer annular face of each rotor core section, the present invention In preferably n=5.
The external diameter of each outer arcuate groove is respectively less than the rotor iron between the external diameter of rotor core section, two neighboring outer arcuate groove Heart section constitutes external reinforcing ribs 17.
An outer tile type permanent magnet is laid in each outer arcuate groove, each outer tile type permanent magnet is low energy densities Permanent magnet.
Interior tile type permanent magnet (namely high-energy-density permanent magnet) in two neighboring rotor core section is circumferentially offset Electric cycle angle be 360 °/2p, the present invention be preferably 36 °.
As shown in fig. 7, the magnetizing direction of all outer tile type permanent magnets in same rotor core section is consistent, position It is consistent in the magnetizing direction of all interior tile type permanent magnets in same rotor core section, in same rotor core section Outer tile type permanent magnet and interior tile type permanent magnet magnetizing direction it is opposite.
The magnetizing direction of outer tile type permanent magnet in two neighboring rotor core section is opposite；Two neighboring rotor core section On interior tile type permanent magnet magnetizing direction it is opposite.
The both sides of each outer tile type permanent magnet and each interior tile type permanent magnet are provided with magnet isolation tank 15.
The coefficient of the magnet isolation tank of high-energy-density permanent magnet both sidesWherein θb1For high-energy-density permanent magnet The central angle of the magnet isolation tank of both sides, θm1For the central angle of high-energy-density permanent magnet；kc1Span is 0-0.2.
The coefficient of the magnet isolation tank of low energy densities permanent magnet both sidesWherein θb2For low energy densities permanent magnet The central angle of the magnet isolation tank of both sides, kc2Span is between 0-0.2.
The inner circumferential coaxial sleeve of magnetic guiding loop is provided with axial charging permanent magnet, and axial charging permanent magnet both can be high-energy-density It is preferably high-energy-density permanent magnet in permanent magnet or low energy densities permanent magnet, the present invention.
As shown in figure 9, the setting of axial charging permanent magnet 31, can greatly improve the torque output energy of Consequent pole permanent magnet motor Power.
Assuming that the external diameter of axial charging permanent magnet is r1, the external diameter of high-energy-density permanent magnet is r3, and high-energy-density is forever The internal diameter of magnet is r4, then r3≤r1≤r4.
Magnetizing direction positioned at two axial charging permanent magnets of same rotor core section both sides is opposite.
The axial length coefficient of magnetic guiding loopWherein LaFor the axial length of magnetic guiding loop, LefFor motor complete machine Effective axial length；kaSpan is 0-0.1.
The pole embrace α of high-energy-density permanent magnetp1=θm1P/ (2 π), wherein θm1For the circle of high-energy-density permanent magnet Heart angle, αp1Span is 0.35-0.75.
The pole embrace α of low energy densities permanent magnetp2=θm2N/ (2 π), wherein n are the individual of low energy densities permanent magnet trough Number, θm2For the central angle of low energy densities permanent magnet, αp2Span is 0.7-0.99.
During as outer rotor, outer arcuate groove is provided with the outside of Consequent pole permanent magnet motor, for placing low energy densities Permanent magnet.Due to the presence of outer arcuate groove, so in magnetic flux path of the interior tile type permanent magnet by the leakage field of fixed shaft end Magnetic resistance become big, therefore the leakage field of the fixation shaft end produced by interior tile type permanent magnet is reduced.Due to outer tile type permanent magnetism Body is also magnetized using unipolarity, so the magnetizing direction of adjacent two sections of low energy densities permanent magnet is on the contrary, outer tile type permanent magnetism The main flux path of body is closed by magnetic guiding loop, its fixing axle brow leakage very little produced.In addition, outer tile type permanent magnet can Further to increase the main flux of motor, so as to improve the torque output capability of Consequent pole permanent magnet motor.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment Detail, in the range of the technology design of the present invention, a variety of equivalents can be carried out to technical scheme, this A little equivalents belong to protection scope of the present invention.

Claims (10)

1. a kind of Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet, it is characterised in that：Including rotor core section, magnetic conduction Ring, high-energy-density permanent magnet and low energy densities permanent magnet；
Rotor core section at least two, and be coaxially disposed；A magnetic conduction is coaxially disposed between two neighboring rotor core section Ring；
Consequent pole permanent magnet motor rotor can also be used as outer rotor as internal rotor；
When Consequent pole permanent magnet motor rotor is as internal rotor, laying mode includes：
1) rotor core section and the equal coaxial package of magnetic guiding loop are in rotating shaft；
2) outer surface of each rotor core section is circumferentially uniformly laid with the outer salient pole of p arc, wherein, p is that motor is extremely right Number；Formed between two neighboring outer salient pole and an outer tile type permanent magnet is laid in an outer arcuate groove, each outer arcuate groove, often Individual outer tile type permanent magnet is high-energy-density permanent magnet；
3) n arc groove, and n >=p are circumferentially uniformly laid with the inner side anchor ring of each rotor core section；Each inner arc The rotor core section that the internal diameter of shape groove is all higher than between the internal diameter of rotor core section, two neighboring arc groove is strengthened in constituting Muscle；An interior tile type permanent magnet is laid in each arc groove, each interior tile type permanent magnet is low energy densities permanent magnetism Body；
When Consequent pole permanent magnet motor rotor is as outer rotor, laying mode includes：
(1) n outer arcuate groove, and n >=p are circumferentially uniformly laid with the outer annular face of each rotor core section；It is each outer The rotor core section that the external diameter of deep-slotted chip breaker is respectively less than between the external diameter of rotor core section, two neighboring outer arcuate groove constitutes outer strengthen Muscle；An outer tile type permanent magnet is laid in each outer arcuate groove, each outer tile type permanent magnet is low energy densities permanent magnetism Body；
(2) inner surface of each rotor core section is circumferentially uniformly laid with the interior salient pole of p arc, two neighboring interior salient pole Between form an arc groove, lay an interior tile type permanent magnet in each arc groove, it is each in tile type permanent magnet It is high-energy-density permanent magnet；
Consequent pole permanent magnet motor rotor also has following laying mode no matter as internal rotor, or as outer rotor：
The electric cycle angle that high-energy-density permanent magnet in two neighboring rotor core section is circumferentially offset is 360 °/2p；
The magnetizing direction of all outer tile type permanent magnets in same rotor core section is consistent, positioned at same rotor iron The magnetizing direction of all interior tile type permanent magnets in heart section is consistent, the outer tile type permanent magnetism in same rotor core section The magnetizing direction of body and interior tile type permanent magnet is opposite；
The magnetizing direction of outer tile type permanent magnet in two neighboring rotor core section is opposite；In two neighboring rotor core section The magnetizing direction of interior tile type permanent magnet is opposite.
2. the Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet according to claim 1, it is characterised in that：It is each outer The both sides of tile type permanent magnet and each interior tile type permanent magnet are provided with magnet isolation tank.
3. the Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet according to claim 2, it is characterised in that：High-energy The coefficient of the magnet isolation tank of density permanent magnet both sidesWherein θb1For the magnet isolation tank of high-energy-density permanent magnet both sides Central angle, θm1For the central angle of high-energy-density permanent magnet；kc1Span is 0-0.2.
4. the Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet according to claim 2, it is characterised in that：Low energy The coefficient of the magnet isolation tank of density permanent magnet both sidesWherein θb2For the magnet isolation tank of low energy densities permanent magnet both sides Central angle, kc2Span is between 0-0.2.
5. the Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet according to claim 1, it is characterised in that：Magnetic guiding loop Periphery or inner circumferential coaxial sleeve be provided with axial charging permanent magnet；Assuming that the external diameter of axial charging permanent magnet is r1, high-energy-density The external diameter of permanent magnet is r3, and the internal diameter of high-energy-density permanent magnet is r4, then r3≤r1≤r4.
6. the Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet according to claim 5, it is characterised in that：Positioned at same The magnetizing direction of two axial charging permanent magnets of one rotor core section both sides is opposite.
7. the Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet according to claim 1, it is characterised in that：Magnetic guiding loop Axial length coefficientWherein LaFor the axial length of magnetic guiding loop, LefFor effective axial length of motor complete machine； kaSpan is 0-0.1.
8. the Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet according to claim 1, it is characterised in that：High-energy The pole embrace α of density permanent magnetp1=θm1P/ (2 π), wherein θm1For the central angle of high-energy-density permanent magnet, αp1Span For 0.35-0.75.
9. the Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet according to claim 1, it is characterised in that：Low energy The pole embrace α of density permanent magnetp2=θm2N/ (2 π), wherein n are the number of low energy densities permanent magnet trough, θm2For low energy The central angle of density permanent magnet, αp2Span is 0.7-0.99.
10. the Consequent pole permanent magnet motor rotor of use hybrid permanent-magnet according to claim 1, it is characterised in that：High energy Metric density permanent magnet is neodymium iron boron, and low energy densities permanent magnet is ferrite.
CN201710388163.5A 2017-05-27 2017-05-27 A kind of Consequent pole permanent magnet motor rotor using hybrid permanent-magnet Active CN107124053B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108768017A (en) * 2018-05-30 2018-11-06 广东威灵电机制造有限公司 Rotor and Consequent pole permanent magnet motor
CN109842257A (en) * 2019-03-04 2019-06-04 哈尔滨工业大学 Anti- salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine
CN112448502A (en) * 2019-09-05 2021-03-05 中车时代电动汽车股份有限公司 Surface-mounted rotor of vehicle permanent magnet driving motor
WO2023108910A1 (en) * 2021-12-17 2023-06-22 威灵（芜湖）电机制造有限公司 Rotor assembly, motor, and electrical equipment

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CN1340898A (en) * 2000-08-31 2002-03-20 雅马哈发动机株式会社 Permanent-magnet rotor
CN102790455A (en) * 2012-01-12 2012-11-21 信质电机股份有限公司 Rotor core and high-efficiency frequency conversion speed regulating permanent magnet synchronous motor
JP2013252044A (en) * 2012-06-04 2013-12-12 Daikin Ind Ltd Method of manufacturing rotor
JP2014072924A (en) * 2012-09-27 2014-04-21 Aisin Seiki Co Ltd Permanent magnet embedded motor

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CN1340898A (en) * 2000-08-31 2002-03-20 雅马哈发动机株式会社 Permanent-magnet rotor
CN102790455A (en) * 2012-01-12 2012-11-21 信质电机股份有限公司 Rotor core and high-efficiency frequency conversion speed regulating permanent magnet synchronous motor
JP2013252044A (en) * 2012-06-04 2013-12-12 Daikin Ind Ltd Method of manufacturing rotor
JP2014072924A (en) * 2012-09-27 2014-04-21 Aisin Seiki Co Ltd Permanent magnet embedded motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108768017A (en) * 2018-05-30 2018-11-06 广东威灵电机制造有限公司 Rotor and Consequent pole permanent magnet motor
CN109842257A (en) * 2019-03-04 2019-06-04 哈尔滨工业大学 Anti- salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine
CN112448502A (en) * 2019-09-05 2021-03-05 中车时代电动汽车股份有限公司 Surface-mounted rotor of vehicle permanent magnet driving motor
WO2023108910A1 (en) * 2021-12-17 2023-06-22 威灵（芜湖）电机制造有限公司 Rotor assembly, motor, and electrical equipment

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