CN105356699B - A kind of automobile-used birotor flux switch motor - Google Patents

A kind of automobile-used birotor flux switch motor Download PDF

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Publication number
CN105356699B
CN105356699B CN201510755061.3A CN201510755061A CN105356699B CN 105356699 B CN105356699 B CN 105356699B CN 201510755061 A CN201510755061 A CN 201510755061A CN 105356699 B CN105356699 B CN 105356699B
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permanent magnet
stator
module
iron core
core
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CN105356699A (en
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朱孝勇
张超
全力
杜怿
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Jiangsu University
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Jiangsu University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/02—Machines with one stator and two or more rotors
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/17—Stator cores with permanent magnets
    • 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
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The present invention discloses a kind of automobile-used birotor flux switch motor, and stator is by threephase armature winding, NsA stator core module and NsA armature slot composition, Ns=3Nc, NcFor the coil number of single-phase winding, NsA stator core module is distributed uniformly and circumferentially, and is armature slot between each two stator core module, and threephase armature winding is placed in armature slot；The centre of each stator core module is radially secure to be embedded with a hybrid permanent magnet module, each hybrid permanent magnet module is made of one piece of iron oxygen permanent magnet and two pieces of identical Nd-Fe-B permanent magnets, among two pieces of Nd-Fe-B permanent magnets, the Nd-Fe-B permanent magnet closed seamless of iron oxygen permanent magnet and both sides links together iron oxygen permanent magnet；Adjacent permanent magnet forms obvious series circuit on magnetic flux path, compared to traditional flux switch permanent magnet motor under parallel circuits, significantly improves the easy saturation problem of stator teeth, effectively increases the utilization rate of permanent magnet.

Description

A kind of automobile-used birotor flux switch motor
Technical field
The invention belongs to technical field of motor manufacture, refers in particular to a kind of birotor magnetic flux switching electricity for electric automobile etc. Machine.
Background technology
Flux switch motor uses stator permanent magnetic type structure, and armature winding and permanent magnet are all located on stator, on rotor both Simple in structure without armature winding also without permanent magnet, reliable, efficiency and power density are higher.On the one hand, such follows magnetic flux The flux switch motor of switching principle, due to possessing winding complementarity, can greatly reduce or offset single winding coil permanent magnetism Higher harmonic components in magnetic linkage and induced electromotive force so that the motor is in the bar using centralized armature winding and rotor straight trough Unloaded permanent magnet flux linkage and the induced electromotive force per phase of higher sine degree are obtained with part；On the other hand, such motor, due to Permanent magnet is embedded in stator teeth, forms effect of having a dinner party by the permanent magnetism of adjacent teeth so that such motor is easy to implement higher Air gap gap magnetic, it is achieved thereby that higher motor torque density and power density.But studied with to such flux switch motor With deepening continuously for application, the intrinsic deficiency of such motor also increasingly shows：1. permanent magnet is embedded among stator tooth, stator Tooth net sectional area greatly reduces so that and the main magnetic circuit of motor passes through stator teeth timesharing, is easily saturated, and motor flux leakage is larger, Magnetic field utilization rate is relatively low, in addition, the permanent-magnet material that the outer leakage field of the distinctive stator of such motor also reduce further motor utilizes Rate；2. for motor to obtain higher air gap flux density in the case of motor main magnetic circuit saturation, the dosage of permanent-magnet material is also obvious high In the permanent magnetic brushless of same power grade, with the continuous rise of rare earth permanent-magnetic material price in recent years, it manufactures cost Obvious rise can undoubtedly limit the further genralrlization of such motor and use.
Comprehensive document both domestic and external, which can be seen that the method for reducing magneto middle rare earth permanent-magnet material dosage, mainly to be had： The utilization rate of permanent magnet is improved, using direct current additive excitation, uses cheap non-rare earth material such as ferrite etc..Document " A (published in novel hybrid excitation flux-switching motor for hybrid vehicles " In IEEE Transactions on Magnetics volumes 45 in 2009,10 phases, 4728-4731 pages) by adding in the stator DC excitation winding, not only reduces the dosage of rare earth permanent-magnetic material, also achieves freely adjusting for air-gap flux, expands electricity The speed adjustable range of machine.But due to the use of DC excitation winding, the structure of motor becomes more complicated, while also increases electricity The copper consumption and copper loss of machine, reduce the operational efficiency of motor.Document " The performance of a on this basis (open hair in hybrid excitation flux switching motor with ferrite magnets for EVs " Table was in IEEE Conference of Transportation Electrification Asia-Pacific in 2014) use Ferrite permanent magnet replaces rare earth permanent magnet excitation, effectively reduces the manufacture cost of motor.But due to ferritic magnetic energy product It is relatively low, it is necessary to improve the torque density of motor by DC excitation winding, the operational efficiency of motor also has much room for improvement.Chinese patent Number a kind of flux switch motor using hybrid permanent-magnet is proposed for 201410508547.2 patent document, the motor is at the same time Excitation is carried out using rare earth permanent magnet and ferrite permanent-magnet, the rare-earth permanent magnet of high energy product is installed in the yoke portion of stator, close The teeth portion of stator installs the ferrite permanent magnet of low magnetic energy product, is consequently formed the mixing that rare-earth permanent magnet is connected with ferrite permanent-magnet Permanent magnet module, on the basis of certain torque density is ensured, reduces the manufacture cost of motor, also without the extra copper of increase Consumption, ensure that the efficiency of motor.But these motors cause all without the cylindrical leakage field of flux switch motor stator is solved the problems, such as The utilization rate of permanent magnet is still relatively low.
Therefore, how while the of a relatively high torque density of motor and efficiency is maintained, motor middle rare earth permanent magnetism material is reduced The problem of dosage of material is urgent need to resolve in non-rare earth or few rare earth flux switch motor field.
The content of the invention
The purpose of the present invention is existing in the prior art to solve the problems, such as, it is proposed that a kind of simple in structure, rotor robustness Energy is good, there is higher torque density, high efficiency, the automobile-used birotor of high permanent magnet utilization rate to lack rare earth flux switch motor, with Meet, in the case where ensureing of a relatively high power density and efficiency, to reduce the requirement of rare earth permanent-magnetic material dosage.
To achieve the above object, the technical solution adopted by the present invention is：Birotor in the present invention includes outer rotor iron core With internal rotor iron core, coaxial empty set internal rotor iron core, coaxial between outer rotor iron core and internal rotor iron core in outer rotor iron core Equipped with stator, the coaxial fixing sleeve of internal rotor iron core is outside non-magnetic shaft, internal rotor iron core outer peripheral surface and stator inner peripheral surface Between have an interior air gap, stator outer peripheral surface and outer rotor iron core inner peripheral surface have an outer air gap, stator be by threephase armature around Group, NsA stator core module and NsA armature slot composition, Ns=3Nc, NcFor the coil number of single-phase winding, NsA stator core Module is distributed uniformly and circumferentially, and is armature slot between each two stator core module, and threephase armature winding is placed on armature In groove；The centre of each stator core module is radially secure to be embedded with a hybrid permanent magnet module, each hybrid permanent-magnet mould Block is all made of one piece of iron oxygen permanent magnet and two pieces of identical Nd-Fe-B permanent magnets, and iron oxygen permanent magnet is in two pieces of Nd-Fe-B permanent magnets The Nd-Fe-B permanent magnet closed seamless of centre, iron oxygen permanent magnet and both sides links together；In same hybrid permanent magnet module Iron oxygen permanent magnet is identical with the magnetizing direction of Nd-Fe-B permanent magnet and all circumferentially cutting orientation magnetizings, adjacent two pieces of hybrid permanent magnets The magnetizing direction of module is opposite.
There is identical salient pole number N on outer rotor iron core and internal rotor iron corer, Nr=Ns±K1, K1=1,2,3 ..., Nc For the coil number of single-phase winding；Radial centre lines and internal rotor iron therebetween between two adjacent outer rotor iron core salient poles The center line of core salient pole overlaps.
Outer rotor iron core is fixedly connected with a circular disk with the same end face of the axial direction of internal rotor iron core, in circular disk Four circular vents have been distributed uniformly and circumferentially in card.
All stator core modules and hybrid permanent magnet module are respectively provided with the center of circle O identical with non-magnetic shaft, stator, The distance of center of circle O to stator inner ring is radius Rsi, the distance to stator outer ring be radius Rso, and 0.5Rso<Rsi<0.6Rso。
Stator core module, iron oxygen permanent magnet and Nd-Fe-B permanent magnet are fan-shaped；The radian of Nd-Fe-B permanent magnet is βNdFe, the radian of iron oxygen permanent magnet is βferrite, the radian measure beta of iron oxygen permanent magnetferriteFor the radian measure beta of Nd-Fe-B permanent magneticNdFeThree Times；The side of each stator core module to minimum curvature shared between Nd-Fe-B permanent magnet side is βs, βs>βferrite+2 βNdFe。
Above-mentioned technical proposal has the advantages that after implementing：
1st, after outer rotor iron core and internal rotor iron core of the invention are fixedly and coaxially connected by the circular disk of end together Rotation so that motor is while single stator fixing and rotor motion characteristics of components is met, two layers air gap inside and outside formation Structure.The permanent magnetic energy that hybrid permanent magnet module on stator produces can establish two respectively independently of each other by two layers of air gap Permanent magnetic field, the permanent magnetic energy of the supersaturated part of traditional flux switch permanent magnet motor stator tooth is effectively converted into foundation The external magnetic field of motor.The electromagnetic torque being respectively acting on birotor inner and outer rotors iron core can be overlapped mutually, so that effectively Improve the torque output capability and power density of motor.Such special designing not only avoid traditional flux switch motor and determine The problem of sub cylindrical leakage field, the utilization rate of permanent magnet is improved, and traditional flux switch permanent magnet motor stator tooth can be reduced Degree of saturation, reduce iron loss during high speed operation of motor, limit the temperature rise of motor.
2nd, dual-rotor structure of the invention is connected with each other by circular disk, and several circles are distributed with circular disk Hole so that air is rotated with motor and circulated in motor internal, forms the structure of radiator fan, effectively improves dissipating for the motor Hot property.
3rd, stator of the invention is using no stator yoke type structure design, in conjunction with birotor so that adjacent permanent magnet is in magnetic Obvious series circuit is formd on path.It is notable compared to traditional flux switch permanent magnet motor under parallel circuits, the motor The Technology Difficulties problem of such easy saturation of motor stator teeth portion is improved, and effectively increases the utilization rate of permanent magnet.
4th, modular stator iron core stator tooth of the invention is designed using novel " radian such as non-", is changed and is lain in gas The direction of magnetic coenergy in gap to rotor relative position angular rate of change so that the location torque that the motor ectonexine air gap produces Cancel out each other after superposition, act on total location torque on Novel dual-rotor to achieve the purpose that to reduce, and then reduced The effect of torque pulsation, this is also another innovation of the present invention.
5th, the present invention uses high-performance Ne-Fe-B permanent-magnet material and cheap non-rare-earth ferrite permanent-magnet material, and iron at the same time Two kinds of permanent-magnet materials of oxysome and neodymium iron boron are serially connected, and propose " magnetomotive force and magnetic flux are balanced " principle, two types permanent magnetism Material dimensionally keeps stringent restriction relation (thickness of ferrite permanent-magnet is three times of Nd-Fe-B permanent magnetic thickness), maximum limit Degree has prompted the performance of two kinds of permanent-magnet materials, ensures to reduce neodymium iron while the of a relatively high torque density of motor and power density The dosage of boron, so as to significantly reduce the manufacture cost of motor.
6th, the present invention is sandwiched in the structure of stator core module using mixing magnetic material module, and in mixing magnetic material module In, ferrite thus avoid stator end when ferrite is located at stator end between inside and outside two pieces of NdFeB materials Magnetic saturation phenomenon, while also improve ferritic anti-degaussing ability.
7th, the mixing magnetic material module that the present invention uses tangentially alternately magnetizes in a circumferential direction so that the magnetic field tool of motor There is poly- magnetic characteristic, and then improve the magnetic flux density of air gap.
8th, the present invention is only with a set of armature winding, thus dexterously avoids conventional double air gap permanent magnet motor due to adopting The Solution of Electromagnetic Field Penetration Problems caused by two sets of armature winding, so as to ensure that the stability and reliability of motor normal operation.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is that a kind of three-dimensional structure of automobile-used birotor flux switch motor of the present invention splits schematic diagram；
Fig. 2 is the axial external view of the present invention；
Fig. 3 is the radial cross section of circular disk in Fig. 2；
Fig. 4 is radial section enlarged diagram of the present invention after circular disk is removed；
Fig. 5 is stator structure in Fig. 4, the installation of permanent magnet magnetizing direction and armature winding and connected mode schematic diagram；
Fig. 6 is the structure of single hybrid permanent magnet module and physical dimension mark enlarged diagram in Fig. 4；
Fig. 7 is that the present invention operates in the partial view being along the circumferential direction unfolded during first position and magnetic flux schematic diagram；
Fig. 8 is the magnetic flux schematic diagram that the present invention runs to the second place from the first position of Fig. 7；
Fig. 9 is no-load magnetic field distribution map of the present invention；
Figure 10 is traditional 12/10 type flux switch motor Distribution of Magnetic Field figure；
Figure 11 is traditional 6/5 type flux switch motor Distribution of Magnetic Field figure；
Figure 12 is no-load back electromotive force oscillogram of the present invention；
In figure：1. birotor；2. outer rotor iron core；3. internal rotor iron core；4. circular disk；5. non-magnetic shaft；It is 6. fixed Son；7. stator core module；8. iron oxygen permanent magnet；9. Nd-Fe-B permanent magnet；10. hybrid permanent magnet module；11. non-magnetic stator Connecting component；12. armature winding；13. armature slot；14. circular vent；15. rotor outer iron core salient pole；16. iron core in rotor Salient pole.
Embodiment
Referring to Fig. 1 and Fig. 2, the present invention is made of birotor 1, stator 6, armature winding 12 and non-magnetic shaft 5.Wherein, Birotor 1 is made of outer rotor iron core 2, internal rotor iron core 3 and circular disk 4, coaxial empty set internal rotor iron in outer rotor iron core 2 Core 3, a circular disk 4 is fixedly mounted on the same end face of axial direction of outer rotor iron core 2 and internal rotor iron core 3, passes through annular Outer rotor iron core 2 and internal rotor iron core 3 are fixed together by disk 4, its connection mode is riveting or welding, make double turn Son 1 becomes an entirety.Stator 6 is co-axially mounted between outer rotor iron core 2 and internal rotor iron core 3, internal rotor iron core 3 is coaxially solid Surely it is sleeved on outside non-magnetic shaft 5, in this way, the present invention is diametrically by non-magnetic shaft 5, internal rotor iron core successively from inside to outside 3rd, 2 concentric suit of stator 6 and outer rotor iron core.Non-magnetic axis 5 passes through birotor 1 and circular disk 4 in the axial direction, non-to lead Magnetic shaft 5 drives whole birotor 1 to rotate coaxially by internal rotor iron core 3.Due to the special designing of birotor 1, make it in sky Between the upper rotary part for forming a hollow cup-shaped.
Diametrically, between the inner peripheral surface of the outer peripheral surface of internal rotor iron core 3 and stator 6 there are the interior air gap of 0.6mm, And the inner peripheral surface of the outer peripheral surface of stator 6 and outer rotor iron core 2 has the outer air gap of 0.6mm.
Outer rotor iron core 2, internal rotor iron core 3 and stator 6 are formed by the D23 silicon steel plate stackings of 0.35mm thickness, are folded It is 0.95 to press coefficient.Non-magnetic shaft 5 and circular disk 4 are formed by the higher non-magnet material of coefficient of heat transfer.
Referring to Fig. 3, in order to effectively improve the heat dissipation performance of motor of the present invention, in the card of circular disk 4 circumferentially Direction is evenly distributed with four circular vents 14, and the radius of each circular vent 14 is R1, the center of circle of 4 round holes 14 Centre distance away from circular disk 4 is equal, is L1.In motor rotary course, air is led to by the circle on circular disk 4 Air holes 14 circulates in motor internal, is conducive to the heat dissipation of motor.
Referring to Fig. 1, Fig. 4 and Fig. 5, there is identical salient pole number N on outer rotor iron core 2 and internal rotor iron core 3r.Adjacent Internal rotor of the radial centre lines just between the two outer rotor iron core salient poles 15 between two outer rotor iron core salient poles 15 The center line of iron core salient pole 16 overlaps, it is same diametrically, so make outer rotor iron core salient pole 15 and internal rotor iron core salient pole 16 The arrangement just straggly of relative position in a circumferential direction.
Stator 6 is by threephase armature winding 12, NsA stator core module 7 and NsA armature slot 13 forms, NsA stator iron Core module 7 is distributed uniformly and circumferentially, and stator core module 7 forms stator teeth, is between each two stator core module 7 Armature slot 13, threephase armature winding 12 are placed in armature slot 13.Wherein, Ns=3Nc, Nr=Ns±K1(K1=1,2,3 ...), Nc For the coil number contained by single-phase winding, Ns6,12 or 18, K can be taken1The integers such as 1,2,3 are then taken accordingly.
The centre of each stator core module 7 is radially secure to be embedded with a hybrid permanent magnet module 10, stator core mould Block 7 and hybrid permanent magnet module 10 are sector structures, and the outside diameter of hybrid permanent magnet module 10 is equal to the outer of stator core module 7 Footpath, the internal diameter of hybrid permanent magnet module 10 are equal to the internal diameter of stator core module 7.Hybrid permanent magnet module 10 and stator core mould Block 7 is bonded as an entirety.
Referring to Fig. 4 and Fig. 5, it is fixed between each two stator core module 7 by non-magnetic stator connecting component 11 Connection.When fixed, fixed between the outer edge of each two stator core module 7 with a non-magnetic stator connecting component 11, often Fixed between the inward flange of two stator core modules 7 with another non-magnetic stator connecting component 11, the connection of the two stators Component 11 is formed by the higher non-magnet material of coefficient of heat transfer.
Each hybrid permanent magnet module 10 is made of one piece of iron oxygen permanent magnet 8 and two pieces of identical Nd-Fe-B permanent magnets 9, Iron oxygen permanent magnet 8 is among two pieces of Nd-Fe-B permanent magnets 9, and iron oxygen permanent magnet 8 and Nd-Fe-B permanent magnet 9 are sector structures, iron Oxygen permanent magnet 8 and 9 closed seamless of Nd-Fe-B permanent magnet of both sides link together, and form a complete hybrid permanent magnet module 10.One piece of iron oxygen permanent magnet 8 in same hybrid permanent magnet module 10 is identical with the magnetizing direction of two pieces of Nd-Fe-B permanent magnets 9 And all circumferentially cutting orientation magnetizing, the magnetizing direction of adjacent two hybrid permanent magnet modules 10 are opposite.In Fig. 5, "+" for armature around The inlet wire direction of group 12, "-" are the outlet direction of armature winding 12, and A, B, C are motor three-phase windings.Wherein, per phase winding one It is divided into NcGroup coil (corresponding, the quantity N of stator core module 7sN when taking 6,12,18cTake 2,4,6), it is and equal per phase coil Centralized circle is around and being placed in armature slot 13.
Referring to Fig. 6, all stator core modules 7 and hybrid permanent magnet module 10 are respectively provided with same center of circle O, center of circle O and The axle center of non-magnetic shaft 5, stator 6 etc. overlaps.The distance of center of circle O to 6 inner ring of stator is radius Rsi, center of circle O to 6 outer ring of stator Distance be radius Rso, and 0.5Rso<Rsi<0.6Rso.The radian of two pieces of Nd-Fe-B permanent magnets 9 is equal, is all βNdFe；Iron oxygen is forever The radian of magnet 8 is βferrite.The radian measure beta of iron oxygen permanent magnet 8ferriteFor the radian measure beta of Nd-Fe-B permanent magnetic 9NdFeThree times.Each The side of stator core module 7 to minimum curvature shared between 9 side of Nd-Fe-B permanent magnet is βs, to ensure certain machinery Intensity, βs>βferrite+2βNdFe.The radian of stator core module 7 is βm, βm=2 βs+2βNdFe+βferrite。
Referring to Fig. 7 and Fig. 8, when motor of the present invention works, in the motor operation course, the stator core module 7 of motor The magnetic flux (magnetic linkage) flowed through can be according to the diverse location switching direction of birotor 1.Motor operation is illustrated in figure 7 first position Put, when birotor 1 runs to the position shown in Fig. 7, the relative position of birotor 1 and stator 6 is：It is opposite due to birotor 1 The direction of motion is clockwise, therefore is by order from left to right：Continuous first and second outer rotor iron of birotor 1 Core salient pole 15 is opposite with first and the 3rd stator core module 7 respectively；In continuous first of birotor 1 and second Rotor iron core salient pole 16 is opposite with second and the 4th stator core module 7 respectively.At this time, iron oxygen permanent magnet 8 and two pieces of neodymiums The magnetic linkage that iron boron permanent magnet 9 produces is serially connected, and passes through armature winding 12 with positive direction (clockwise direction).Iron oxygen permanent magnet 8 and the path of magnetic flux that produces of two pieces of Nd-Fe-B permanent magnets 9 it is as follows in the direction of the clock：Pass through second piece of Nd-Fe-B permanent magnetic successively 9, first pieces of body, 8, first pieces of iron oxygen permanent magnet Nd-Fe-B permanent magnet, 9, first stator core modules 7, outer air gap, first it is outer Rotor iron core salient pole 15, outer rotor yoke portion, second outer rotor iron core salient pole 15, outer air gap, the 3rd stator core module 7, 3rd piece of Nd-Fe-B permanent magnet, 9, second pieces of iron oxygen permanent magnets, 8, the 4th pieces of Nd-Fe-B permanent magnets 9, the 4th stator core module 7th, interior air gap, second internal rotor iron core salient pole 16, internal rotor yoke portion, first internal rotor iron core salient pole 16, interior air gap, second A stator core module 7.Therefore, at Fig. 7 positions, the present invention has stronger poly- magnetic effect, it is possible to provide higher air gap magnetic Flux density.
When birotor 1 runs to second position as shown in Figure 8, the relative position of its birotor 1 and stator 6 is： By order from left to right, continuous first of birotor 1 and second outer rotor iron core salient pole 15 respectively with second and 4th stator core module 7 is opposite；Continuous first of birotor 1 and second internal rotor iron core salient pole 16 are respectively with One and the 3rd stator core module 7 it is opposite.At this time, the magnetic linkage phase that iron oxygen permanent magnet 8 and two pieces of Nd-Fe-B permanent magnets 9 produce Mutually series connection, and armature winding 12 is passed through with opposite direction (counter clockwise direction).Iron oxygen permanent magnet 8 and two pieces of Nd-Fe-B permanent magnetics 9 produce Magnetic flux path it is as follows in the direction of the clock：Successively by 9, second pieces of iron oxygen permanent magnets 8 of the 3rd piece of Nd-Fe-B permanent magnet, the Four pieces of Nd-Fe-B permanent magnets 9, the 4th stator core module 7, outer air gap, second outer rotor iron core salient pole 15, outer rotor yoke Portion, first outer rotor iron core salient pole 15, outer air gap, second stator core module, 7, second pieces of Nd-Fe-B permanent magnets 9, first 8, first pieces of block iron oxygen permanent magnet Nd-Fe-B permanent magnet 9, first stator core module 7, interior air gap, first internal rotor iron core Salient pole 16, internal rotor yoke portion, second internal rotor iron core salient pole 16, interior air gap, the 3rd stator core module 7.Therefore, scheming During 8 position, the present invention has stronger poly- magnetic effect, it is possible to provide higher air gap flux density.Further, since shown in Fig. 7 First position when, the magnetic flux that iron oxygen permanent magnet 8 and two pieces of Nd-Fe-B permanent magnets 9 produce passes through armature winding in a clockwise direction 12, and at the second place shown in Fig. 8, which passes through armature winding 12 in a counterclockwise direction, thus ought continuously switch and determine During the relative position of son 6 and birotor 1, it can be induced with ambipolar alternation induced electromotive force in armature winding 12.
Referring to Fig. 9, Figure 10 and Figure 11, structure design using the present invention compares traditional magnetic flux switching electricity in Figure 10 and Figure 11 The Distribution of Magnetic Field of machine, Distribution of Magnetic Field of the present invention is ingenious and the problem of efficiently avoid the serious leakage field in 6 outer ring of stator, and the present invention can Effectively by the permanent magnetic energy of the supersaturated part of traditional flux switch permanent magnet motor stator tooth, to be converted into and establish the outer of motor Magnetic field.Therefore, the present invention can not only reduce the degree of saturation of traditional flux switch permanent magnet motor stator tooth, can also make difference The electromagnetic torque acted on Novel dual-rotor inner and outer rotors iron core is overlapped, so that the torque for being effectively improved motor is defeated Output capacity and power density.
Referring to Figure 12, for the no-load back electromotive force oscillogram of the present invention, it can be seen that present invention zero load counter potential waveform is shown Higher sine degree is shown, its most of harmonic content obtains canceling compensation, and is suitable for brushless ac control operation.Cause This, special winding of the invention is set, and has the characteristics that the complementary of winding.

Claims (6)

1. a kind of automobile-used birotor flux switch motor, birotor (1) includes outer rotor iron core (2) and internal rotor iron core (3), outside Coaxial empty set internal rotor iron core (3), is coaxially equipped between outer rotor iron core (2) and internal rotor iron core (3) in rotor core (2) Stator (6), the coaxial fixing sleeve of internal rotor iron core (3) in non-magnetic shaft (5) outside, internal rotor iron core (3) outer peripheral surface and stator (6) there is interior air gap between inner peripheral surface, stator (6) outer peripheral surface has outer air gap with outer rotor iron core (2) inner peripheral surface, its It is characterized in：Stator (6) is by threephase armature winding, NsA stator core module (7) and NsA armature slot (13) composition, Ns= 3Nc, NcFor the coil number of single-phase winding, NsA stator core module (7) is distributed uniformly and circumferentially, each two stator iron It is armature slot (13) between core module (7), threephase armature winding is placed in armature slot (13)；Each stator core module (7) Centre it is radially secure be embedded with a hybrid permanent magnet module (10), each hybrid permanent magnet module (10) is by one block of iron oxygen Permanent magnet (8) Nd-Fe-B permanent magnet (9) composition identical with two pieces, iron oxygen permanent magnet (8) is in two pieces of Nd-Fe-B permanent magnets (9) Between, iron oxygen permanent magnet (8) is connected with Nd-Fe-B permanent magnet (9) closed seamless of both sides；Same hybrid permanent magnet module (10) In iron oxygen permanent magnet (8) is identical with the magnetizing direction of Nd-Fe-B permanent magnet (9) and all circumferentially cutting orientation magnetizings, adjacent two pieces The magnetizing direction of hybrid permanent magnet module (10) is opposite.
2. a kind of automobile-used birotor flux switch motor according to claim 1, it is characterized in that：Outer rotor iron core (2) and interior There is identical salient pole number N on rotor core (3)r, Nr=Ns±K1, K1=1,2,3 ..., NcFor the coil of single-phase winding Number；In radial centre lines between two adjacent outer rotor iron core salient poles (15) and internal rotor iron core salient pole (16) therebetween Heart line overlaps.
3. a kind of automobile-used birotor flux switch motor according to claim 1, it is characterized in that：Outer rotor iron core (2) and interior The same end face of axial direction of rotor core (3) is fixedly connected with a circular disk (4), in the card of circular disk (4) circumferentially Direction is evenly distributed with four circular vents.
4. a kind of automobile-used birotor flux switch motor according to claim 1, it is characterized in that：All stator core modules (7) and hybrid permanent magnet module (10) is respectively provided with the center of circle O, center of circle O to stator identical with non-magnetic shaft (5), stator (6) (6) distance of inner ring is radius Rsi, the distance to stator (6) outer ring be radius Rso, and 0.5Rso<Rsi<0.6Rso。
5. a kind of automobile-used birotor flux switch motor according to claim 1, it is characterized in that：Stator core module (7), iron Oxygen permanent magnet (8) and Nd-Fe-B permanent magnet (9) are fan-shaped；The radian of Nd-Fe-B permanent magnet (9) is βNdFe, iron oxygen permanent magnet (8) radian is βferrite, the radian measure beta of iron oxygen permanent magnet (8)ferriteFor the radian measure beta of Nd-Fe-B permanent magnetic (9)NdFeThree times.
6. a kind of automobile-used birotor flux switch motor according to claim 5, it is characterized in that：Each stator core module (7) side to minimum curvature shared between Nd-Fe-B permanent magnet (9) side is βs, βs>βferrite+2βNdFe。
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