CN107124053B - A kind of Consequent pole permanent magnet motor rotor using hybrid permanent-magnet - Google Patents

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

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Publication number
CN107124053B
CN107124053B CN201710388163.5A CN201710388163A CN107124053B CN 107124053 B CN107124053 B CN 107124053B CN 201710388163 A CN201710388163 A CN 201710388163A CN 107124053 B CN107124053 B CN 107124053B
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permanent magnet
magnet
core section
rotor
rotor core
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CN107124053A (en
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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

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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 Consequent pole permanent magnet motor rotor using 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 be used as internal rotor, can also be used as outer rotor.The outer surface of each rotor core section or the inner surface circumferentially uniformly distributed outer salient pole for having p arc, wherein p is motor number of pole-pairs；An outer arcuate slot is formed between two neighboring outer salient pole, lays a high-energy density permanent magnet in each outer arcuate slot；It is circumferentially uniformly distributed on the inner or outer side anchor ring of each rotor core section to have n inner arc slot, and n >=p；A low energy densities permanent magnet is laid in each inner arc slot.The present invention can further increase the torque output capability of alternately pole surface formula magneto while saving motor cost and weakening alternately pole surface formula magneto shaft leakage field.

Description

A kind of Consequent pole permanent magnet motor rotor using hybrid permanent-magnet
Technical field
The present invention relates to design of electrical motor field, especially a kind of Consequent pole permanent magnet motor rotor using hybrid permanent-magnet.
Background technique
Magneto has high torque density and high efficiency, has been widely used for medical instrument, household electrical appliance, electronic vapour The fields such as vehicle, wind-power electricity generation and aerospace.Different rotor structure for permanent magnet motor, so that magnetic circuit is different, 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 permanent magnet 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 Iron core → return to the boundary for starting two permanent magnets.
As 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 axis inductor.
The electromagnetic torque T of permanent magnet 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 axis inductor, 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.
Since the d-axis inductance of surface permanent magnetic motor is equal to axis inductor, so its reluctance torque component is 0.It contains only Permanent-magnet torque component, i.e. the electromagnetic torque T of surface permanent magnetic motoreExpression formula, can be by shown in formula (b).
The manufacturing process of surface permanent magnetic rotor is simple, and reluctance torque component is not contained in output torque, therefore is controlled Method processed is simple, is widely used in the servo drives occasion such as lathe, robot and medical instrument.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, apply Number patent of invention for being 200710010915.0, provides 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, permanent-magnet material is saved, 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, brow leakage ratio It is more serious.
In addition, alternately the roller end of pole surface formula magneto has unipolarity leakage field, so that the roller end of motor Magnetize, this by entire electric system reliability and safety have an impact.Patent of invention 201611011019.1 mentions The method for using rotor segment out, provides leakage path inside rotor and shaft, weakens 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 lower.
Summary of the invention
Hybrid permanent magnet is used in view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a kind of 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 formula magneto shaft leakage field, the torque for further increasing alternately pole surface formula magneto is defeated Output capacity.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of Consequent pole permanent magnet motor rotor using 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 there are 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 be used as internal rotor, can also be used as outer 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 shaft.
2) outer surface of each rotor core section circumferentially uniformly distributed outer salient pole for having p arc, wherein p is motor Number of pole-pairs；An outer arcuate slot is formed between two neighboring outer salient pole, lays an outer tile type permanent magnetism in each outer arcuate slot Body, each outer tile type permanent magnet is high-energy density permanent magnet.
3) circumferentially uniformly distributed on the inside anchor ring of each rotor core section to have n inner arc slot, and n >=p；Each The internal diameter of inner arc slot is all larger than the internal diameter of rotor core section, and the rotor core section between two neighboring inner arc slot constitutes interior add Strengthening tendons；Lay an interior tile type permanent magnet in each inner arc slot, 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) circumferentially uniformly distributed on the outer annular face of each rotor core section to have n outer arcuate slot, and n >=p；Often The outer diameter of a outer arcuate slot is respectively less than the outer diameter of rotor core section, and the rotor core section between two neighboring outer arcuate slot constitutes outer Reinforcing rib；An outer tile type permanent magnet is laid in each outer arcuate slot, each outer tile type permanent magnet is low energy densities Permanent magnet；
(2) inner surface of each rotor core section circumferentially uniformly distributed interior salient pole for having p arc, it is two neighboring in An inner arc slot is formed between salient pole, an interior tile type permanent magnet is laid in each inner arc slot, each interior tile type is forever Magnet is high-energy density permanent magnet.
No matter Consequent pole permanent magnet motor rotor is used as internal rotor, or as outer rotor, also has following laying mode.
The electric period angle that high-energy density permanent magnet in two neighboring rotor core section is circumferentially offset be 360 °/ 2p。
The magnetizing direction of all outer tile type permanent magnets in the same rotor core section is consistent, is located 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 the 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 two 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 two sidesWherein θb1For high-energy density permanent magnet The central angle of the magnet isolation tank of two sides, θm1For the central angle of high-energy density permanent magnet；kc1Value range is 0-0.2.
The coefficient of the magnet isolation tank of low energy densities permanent magnet two sidesWherein θb2For low energy densities permanent magnetism The central angle of the magnet isolation tank of body two sides, kc2Value range is between 0-0.2.
The periphery of magnetic guiding loop or inner circumferential coaxial sleeve are equipped with axial charging permanent magnet；Assuming that the outer diameter of axial charging permanent magnet is R1, the outer diameter of high-energy density permanent magnet are 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 two 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；kaValue range 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, αp1Value range is 0.35-0.75.
The pole embrace α of low energy densities permanent magnetp2=θm2N/ (2 π), wherein n is of low energy densities permanent magnet trough Number, θm2For the central angle of low energy densities permanent magnet, αp2Value range 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 with the above structure, motor cost can saved and weakening alternately pole surface formula magneto shaft leakage While magnetic, the torque output capability of alternately pole surface formula magneto is further increased.
Detailed description of the invention
The two-dimensional structure schematic diagram of rotor core section when Fig. 1 shows the present invention as internal rotor.
Fig. 2 permanent magnet magnetizing direction two dimension signal in two neighboring rotor core section when showing the present invention as internal rotor Figure.
Fig. 3 shows three dimensional structure diagram of the present invention as internal rotor and when being free of axial charging permanent magnet.
Roller end leakage field magnetic flux path figure when Fig. 4 shows the present invention as internal rotor.
The main flux path profile of low energy densities permanent magnet when Fig. 5 shows the present invention as internal rotor.
Fig. 6 shows three dimensional structure diagram of the present invention as internal rotor and containing axial charging permanent magnet when.
Fig. 7 permanent magnet magnetizing direction two dimension signal in two neighboring rotor core section when showing the present invention as outer rotor Figure.
Fig. 8 shows three dimensional structure diagram of the present invention as outer rotor when.
Fig. 9 shows electromagnetic torque comparison (half electric period) of the present invention with prior art motor.
Wherein have:
10. rotor core section；11. outer salient pole；12. outer arcuate slot；Reinforcing rib in 13.；14. inner arc slot；15. every magnetic Slot；Salient pole in 16.；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. shaft；50. roller end leakage field magnetic flux path；60. main flux path.
Specific embodiment
Xia Mianjiehefutuhejuti compare Jia Shishifangshiduibenfamingzuojinyibuxiangxishuoming.
For 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.
One, 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 using hybrid permanent-magnet, including rotor core section 10, 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.
Rotor core section at least there are two, between two neighboring rotor core section be coaxially disposed a magnetic guiding loop.
It will be described in detail by taking two rotor core sections as an example in the present invention, magnetic guiding loop will be 1.Two rotor cores Section and an equal coaxial package of magnetic guiding loop are in shaft.
The outer surface of each rotor core section circumferentially uniformly distributed outer salient pole for having p arc, wherein p is motor pole Logarithm, the present invention in p=5.
An outer arcuate slot is formed between two neighboring outer salient pole, lays an outer tile type permanent magnetism in each outer arcuate slot Body, each outer tile type permanent magnet is high-energy density permanent magnet.
It is circumferentially uniformly distributed on the inside anchor ring of each rotor core section to have n inner arc slot, and n >=p, the present invention In, preferably n=5.
The internal diameter of each inner arc slot is all larger than the internal diameter of rotor core section.
Rotor core section between two neighboring inner arc slot constitutes interior reinforcing rib 13；One is laid in each inner arc slot 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 period angle be 360 °/2p, the present invention is preferably 36 °.
As shown in Fig. 2, the magnetizing direction for all outer tile type permanent magnets being located in the same rotor core section is consistent, position It is consistent in the magnetizing direction of all interior tile type permanent magnets in the same rotor core section, it is located in the 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 two 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 two sidesWherein θb1For outer tile type permanent magnet two sides Magnet isolation tank central angle, θm1For the central angle of outer tile type permanent magnet；kc1Value range is 0-0.2.
The coefficient of the magnet isolation tank of interior tile type permanent magnet two sidesWherein θb2For interior tile type permanent magnet two sides Magnet isolation tank central angle, kc2Value range is between 0-0.2.
The periphery coaxial sleeve of magnetic guiding loop is equipped with axial charging permanent magnet 31, and axial charging permanent magnet 31 is either high-energy Density permanent magnet is also possible to low energy densities permanent magnet, is preferably high-energy density permanent magnet in 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 outer diameter of axial charging permanent magnet is r1, the outer 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 two 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；kaValue range 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, αp1Value range is 0.35-0.75.
The pole embrace α of interior tile type permanent magnetp2=θm2N/ (2 π), wherein n is the number of interior tile type permanent magnet trough, θm2For the central angle of interior tile type permanent magnet, αp2Value range is 0.7-0.99.
Inner arc slot is provided on the inside of Consequent pole permanent magnet motor, for placing low energy densities permanent magnet.Due to interior The presence of arc groove, other than tile type permanent magnet pass through the leakage field of roller end magnetic flux path in magnetic resistance become larger, therefore The leakage field of the roller end generated by outer tile type permanent magnet reduces, roller end leakage field magnetic flux path 50 as shown in Figure 4. Since 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 the circuit that stator core, two-stage rotor iron core and magnetic guiding loop constitute closure: tile type is forever in one section Tile type permanent magnet → magnetic conduction in magnet → outer salient pole → air gap → stator core → air gap → another section of outer salient pole → 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, the roller end leakage field very little generated.In addition, interior tile Formula permanent magnet can further increase the main flux of motor, to improve the torque output capability of Consequent pole permanent magnet motor.Such as Fig. 9 Shown, electromagnetic torque of the invention is much higher than the electromagnetic torque in background technique 201611011019.1.
Two, 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 using hybrid permanent-magnet also includes rotor core Section 10, magnetic guiding loop 30, high-energy density permanent magnet 21 and low energy densities permanent magnet 22.
Rotor core section at least there are two, between two neighboring rotor core section be coaxially disposed a magnetic guiding loop.
It will be described in detail by taking two rotor core sections as an example in the present invention, magnetic guiding loop will be 1.
Stator is coaxially fixedly set in the periphery of fixing axle, and the two is formed as an integrated structure；Fixed both ends of the shaft is respectively from fixed Sub- both ends are stretched out, and two extension ends 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 circumferentially uniformly distributed interior salient pole for having p arc, preferred p in the present invention =5.
An inner arc slot is formed between two neighboring interior salient pole, lays an interior tile type permanent magnetism in each inner arc slot Body, each interior tile type permanent magnet is high-energy density permanent magnet.
It is circumferentially uniformly distributed on the outer annular face of each rotor core section to have n outer arcuate slot, and n >=p, the present invention In preferred n=5.
The outer diameter of each outer arcuate slot is respectively less than the outer diameter of rotor core section, the rotor iron between two neighboring outer arcuate slot Heart section constitutes external reinforcing ribs 17.
An outer tile type permanent magnet is laid in each outer arcuate slot, 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 period angle be 360 °/2p, the present invention is preferably 36 °.
As shown in fig. 7, the magnetizing direction for all outer tile type permanent magnets being located in the same rotor core section is consistent, position It is consistent in the magnetizing direction of all interior tile type permanent magnets in the same rotor core section, it is located in the 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 two 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 two sidesWherein θb1For high-energy density permanent magnet The central angle of the magnet isolation tank of two sides, θm1For the central angle of high-energy density permanent magnet；kc1Value range is 0-0.2.
The coefficient of the magnet isolation tank of low energy densities permanent magnet two sidesWherein θb2For low energy densities permanent magnet The central angle of the magnet isolation tank of two sides, kc2Value range is between 0-0.2.
The inner circumferential coaxial sleeve of magnetic guiding loop is equipped with axial charging permanent magnet, and axial charging permanent magnet is either high-energy density Permanent magnet is also possible to low energy densities permanent magnet, is preferably high-energy density permanent magnet in 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 outer diameter of axial charging permanent magnet is r1, the outer 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 two 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；kaValue range 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, αp1Value range is 0.35-0.75.
The pole embrace α of low energy densities permanent magnetp2=θm2N/ (2 π), wherein n is of low energy densities permanent magnet trough Number, θm2For the central angle of low energy densities permanent magnet, αp2Value range is 0.7-0.99.
When as outer rotor, outer arcuate slot is provided on the outside of Consequent pole permanent magnet motor, for placing low energy densities Permanent magnet.Due to the presence of outer arcuate slot, so in magnetic flux path of the interior tile type permanent magnet by the leakage field of fixing axle end Magnetic resistance become larger, therefore reduced by the leakage field of fixing axle end that interior tile type permanent magnet generates.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, the fixing axle brow leakage very little generated.In addition, outer tile type permanent magnet can To further increase the main flux of motor, to improve the torque output capability of Consequent pole permanent magnet motor.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above Detail a variety of equivalents can be carried out to technical solution of the present invention within the scope of the technical concept of the present invention, this A little equivalents all belong to the scope of protection of the present invention.

Claims (10)

1. a kind of Consequent pole permanent magnet motor rotor using 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 there are 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 be used as internal rotor, can also be used as outer 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 shaft；
2) outer surface of each rotor core section circumferentially uniformly distributed outer salient pole for having p arc, wherein p is that motor is extremely right Number；An outer arcuate slot is formed between two neighboring outer salient pole, lays an outer tile type permanent magnet in each outer arcuate slot, often A outer tile type permanent magnet is high-energy density permanent magnet；
3) circumferentially uniformly distributed on the inside anchor ring of each rotor core section to have n inner arc slot, and n >=p；Each inner arc The internal diameter of shape slot is all larger than the internal diameter of rotor core section, and the rotor core section between two neighboring inner arc slot constitutes interior reinforce Muscle；An interior tile type permanent magnet is laid in each inner arc slot, 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) circumferentially uniformly distributed on the outer annular face of each rotor core section to have n outer arcuate slot, and n >=p；It is each outer The outer diameter of arc groove is respectively less than the outer diameter of rotor core section, and the rotor core section between two neighboring outer arcuate slot constitutes outer reinforce Muscle；An outer tile type permanent magnet is laid in each outer arcuate slot, each outer tile type permanent magnet is low energy densities permanent magnetism Body；
(2) inner surface of each rotor core section circumferentially uniformly distributed interior salient pole for having p arc, two neighboring interior salient pole Between form an inner arc slot, lay an interior tile type permanent magnet in each inner arc slot, it is each in tile type permanent magnet It is high-energy density permanent magnet；
No matter Consequent pole permanent magnet motor rotor is used as internal rotor, or as outer rotor, also has following laying mode:
The electric period angle that outer tile type permanent magnet or interior tile type permanent magnet in two neighboring rotor core section are circumferentially offset Degree is 360 °/2p；
The magnetizing direction of all outer tile type permanent magnets in the same rotor core section is consistent, is located at the 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 the 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 according to claim 1 using hybrid permanent-magnet, it is characterised in that: each outer The two 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 according to claim 2 using hybrid permanent-magnet, it is characterised in that: high-energy The coefficient of the magnet isolation tank of density permanent magnet two sidesWherein θb1For the magnet isolation tank of high-energy density permanent magnet two sides Central angle, θm1For the central angle of high-energy density permanent magnet；kc1Value range is 0-0.2.
4. the Consequent pole permanent magnet motor rotor according to claim 2 using hybrid permanent-magnet, it is characterised in that: low energy The coefficient of the magnet isolation tank of density permanent magnet two sidesWherein θb2For the magnet isolation tank of low energy densities permanent magnet two sides Central angle, θm2For the central angle of low energy densities permanent magnet, kc2Value range is between 0-0.2.
5. the Consequent pole permanent magnet motor rotor according to claim 1 using hybrid permanent-magnet, it is characterised in that: magnetic guiding loop Periphery or inner circumferential coaxial sleeve be equipped with axial charging permanent magnet；Assuming that the outer diameter of axial charging permanent magnet is r1, high-energy density The outer 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 according to claim 5 using hybrid permanent-magnet, it is characterised in that: be located at same The magnetizing direction of two axial charging permanent magnets of one rotor core section two sides is opposite.
7. the Consequent pole permanent magnet motor rotor according to claim 1 using hybrid permanent-magnet, 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； kaValue range is 0-0.1.
8. the Consequent pole permanent magnet motor rotor according to claim 1 using hybrid permanent-magnet, 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, αp1Value range For 0.35-0.75.
9. the Consequent pole permanent magnet motor rotor according to claim 1 using hybrid permanent-magnet, it is characterised in that: low energy The pole embrace α of density permanent magnetp2=θm2N/ (2 π), wherein n is the number of low energy densities permanent magnet trough, θm2For low energy The central angle of density permanent magnet, αp2Value range is 0.7-0.99.
10. the Consequent pole permanent magnet motor rotor according to claim 1 using hybrid permanent-magnet, it is characterised in that: high energy Metric density permanent magnet is neodymium iron boron, and low energy densities permanent magnet is ferrite.
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