CN105356699A - Dual-rotor flux-switching motor for vehicle - Google Patents

Dual-rotor flux-switching motor for vehicle Download PDF

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Publication number
CN105356699A
CN105356699A CN201510755061.3A CN201510755061A CN105356699A CN 105356699 A CN105356699 A CN 105356699A CN 201510755061 A CN201510755061 A CN 201510755061A CN 105356699 A CN105356699 A CN 105356699A
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China
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permanent magnet
stator
iron core
rotor iron
module
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CN201510755061.3A
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CN105356699B (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

Abstract

The present invention discloses a dual-rotor flux-switching motor for a vehicle. A stator is formed by three-phase armature winding, Ns stator core modules and Ns armature slots, Ns=3Nc, and Nc is the coil number of single-phase windings. The Ns stator core modules are uniformly distributed along a circumferential direction. An armature slot is arranged between each two stator core modules, and the three-phase armature winding is placed in the armature slots. A hybrid permanent magnet module is fixedly embedded at the middle of each of the stator core modules along a radial direction. Each of the hybrid permanent magnet modules is formed by a ferrite permanent magnet and two identical NdFeB permanent magnets, and the ferrite permanent magnet and the NdFeB permanent magnets at two sides are closely and seamlessly connected. A significant series magnetic circuit is formed in the magnet flux path of two adjacent permanent magnets. Compared with a traditional magnet flux switching permanent magnet motor in a parallel magnetic circuit, the stator tooth part easy saturation problem is significantly improved, and the utilization rate of the permanent magnet is effectively improved.

Description

A kind of automobile-used birotor flux switch motor
Technical field
The invention belongs to technical field of motor manufacture, refer in particular to a kind of birotor flux switch motor for electric automobile etc.
Background technology
Flux switch motor adopts stator permanent magnetic type structure, and armature winding and permanent magnet are all positioned on stator, on rotor both without armature winding also without permanent magnet, structure is simply, reliable, efficiency and power density higher.On the one hand, such follows the flux switch motor of magnetic flux switching principle, owing to possessing winding complementarity, can greatly reduce or offset the higher harmonic components in single winding coil permanent magnet flux linkage and induced electromotive force, make this motor under the centralized armature winding of employing with the condition of rotor straight trough, just can obtain every mutually unloaded permanent magnet flux linkage and the induced electromotive force of higher sine degree; On the other hand, such motor, because permanent magnet is embedded in stator teeth, forms by the permanent magnetism of adjacent teeth effect of having a dinner party, makes such motor easily realize higher air gap gap magnetic, thus achieve higher motor torque density and power density.But along with deepening continuously to such flux switch motor investigation and application, the intrinsic deficiency of such motor also manifests day by day: 1. permanent magnet is embedded in the middle of stator tooth, stator tooth net sectional area reduces greatly, make the main magnetic circuit of motor through stator teeth timesharing, be easy to saturated, motor flux leakage is comparatively large, and magnetic field utilance is lower, in addition, the outer leakage field of the distinctive stator of such motor also reduce further the permanent magnetic material utilance of motor; 2. motor is obtain higher air gap flux density when motor main magnetic circuit is saturated, the consumption of permanent magnetic material is also apparently higher than the permanent magnetic brushless of same power grade, along with the continuous rise of rare earth permanent-magnetic material price in recent years, the further genralrlization that the obvious rising of its manufacturing cost can limit such motor undoubtedly uses.
Comprehensive document both domestic and external can be found out, the method reducing magneto middle rare earth permanent magnetic material consumption mainly contains: the utilance improving permanent magnet, adopts direct current additive excitation, the non-rare earth material etc. that use ferrite etc. are cheap.(publish in IEEETransactionsonMagnetics45 volume in 2009 in document " Anovelhybridexcitationflux-switchingmotorforhybridvehicl es ", 10 phases, 4728-4731 page) by adding DC excitation winding in the stator, not only reduce the consumption of rare earth permanent-magnetic material, also achieve the free adjustment of air-gap flux, expand the speed adjustable range of motor.But due to the use of DC excitation winding, the structure of motor becomes more complicated, too increases copper consumption and the copper loss of motor, reduces the operational efficiency of motor simultaneously.In document " Theperformanceofahybridexcitationfluxswitchingmotorwithf erritemagnetsforEVs ", (publishing in IEEEConferenceofTransportationElectrificationAsia-Pacifi c in 2014) adopts ferrite permanent magnet to replace rare earth permanent magnet excitation on this basis, effectively reduces the manufacturing cost of motor.But because ferritic magnetic energy product is lower, need the torque density being improved motor by DC excitation winding, the operational efficiency of motor also has much room for improvement.China Patent No. be 201410508547.2 patent documentation propose a kind of flux switch motor adopting hybrid permanent-magnet, this motor uses rare earth permanent magnet and ferrite permanent-magnet to carry out excitation simultaneously, the rare-earth permanent magnet of high energy product is installed in the yoke portion of stator, the ferrite permanent magnet of low magnetic energy product is installed in the teeth portion near stator, form the hybrid permanent magnet module that rare-earth permanent magnet is connected with ferrite permanent-magnet thus, on the basis ensureing certain torque density, reduce the manufacturing cost of motor, do not increase extra copper loss, ensure that the efficiency of motor yet.But these motors all do not solve the problem of flux switch motor stator cylindrical leakage field, cause the utilance of permanent magnet still lower.
Therefore, how while maintenance motor relatively high torque density and efficiency, the consumption reducing motor middle rare earth permanent magnetic material is the problem needing solution in non-rare earth or few rare earth flux switch motor field badly.
Summary of the invention
The object of the invention is for solving prior art Problems existing, propose that a kind of structure is simple, rotor robust performance is good, there is higher torque density, the few rare earth flux switch motor of the automobile-used birotor of high efficiency, high permanent magnet utilance, with meet when ensure relatively high power density and efficiency, reduce the requirement of rare earth permanent-magnetic material consumption.
For achieving the above object, the technical solution used in the present invention is: the birotor in the present invention comprises outer rotor iron core and internal rotor iron core, coaxial empty set internal rotor iron core in outer rotor iron core, between outer rotor iron core and internal rotor iron core, coaxially stator is housed, the coaxial fixed cover of internal rotor iron core is outside non-magnetic rotating shaft, interior air gap is had between internal rotor iron core outer peripheral surface and stator inner peripheral surface, stator outer peripheral surface and outer rotor iron core inner peripheral surface have outer air gap, and stator is by threephase armature winding, N sindividual stator core module and N sindividual armature slot composition, N s=3N c, N cfor the coil number of single-phase winding, N sindividual stator core module is along the circumferential direction uniformly distributed, and be armature slot between every two stator core modules, threephase armature winding is placed in armature slot; The centre of each stator core module is radially fixedly embedded with a hybrid permanent magnet module, each hybrid permanent magnet module is made up of the Nd-Fe-B permanent magnet that one piece of iron oxygen permanent magnet is identical with two pieces, iron oxygen permanent magnet is in the middle of two pieces of Nd-Fe-B permanent magnets, and the Nd-Fe-B permanent magnet closed seamless of iron oxygen permanent magnet and both sides links together; Iron oxygen permanent magnet in same hybrid permanent magnet module and all circumferentially cutting orientation magnetizing identical with the magnetizing direction of Nd-Fe-B permanent magnet, the magnetizing direction of two pieces of adjacent hybrid permanent magnet modules is contrary.
Outer rotor iron core and internal rotor iron core has identical salient pole number N r, N r=N s± K 1, K 1=1,2,3 ..., N cfor the coil number of single-phase winding; Radial centre lines between two adjacent outer rotor iron core salient poles overlaps with the center line of internal rotor iron core salient pole therebetween.
Outer rotor iron core is fixedly connected with a circular disk with the same end face of the axis of internal rotor iron core, and the card of circular disk is along the circumferential direction evenly distributed with four circular vent.
All stator core modules and hybrid permanent magnet module all have and non-magnetic rotating shaft, center of circle O that stator is identical, and center of circle O is radius R to the distance of stator inner ring si, to the distance of stator outer ring be radius R so, and 0.5R so<R si<0.6R so.
Stator core module, iron oxygen permanent magnet and Nd-Fe-B permanent magnet are all fan-shaped; The radian of Nd-Fe-B permanent magnet is β ndFe, the radian of iron oxygen permanent magnet is β ferrite, the radian measure beta of iron oxygen permanent magnet ferritefor the radian measure beta of Nd-Fe-B permanent magnetic ndFethree times; Minimum curvature shared between the side of each stator core module to Nd-Fe-B permanent magnet side is β s, β s> β ferrite+ 2 β ndFe.
Technique scheme has following beneficial effect after implementing:
1, outer rotor iron core of the present invention is rotated after being coaxially fixedly connected with by the circular disk of end with internal rotor iron core together, makes motor while satisfied single stator fixing and rotor motion characteristics of components, forms the structure of inside and outside two-layer air gap.The permanent magnetic energy that hybrid permanent magnet module on stator produces can set up two separate permanent magnetic fields respectively by two-layer air gap, effectively the permanent magnetic energy of the supersaturation part of traditional flux switch permanent magnet motor stator tooth is converted into the external magnetic field setting up motor.The electromagnetic torque acted on respectively on birotor inner and outer rotors iron core can superpose mutually, thus effectively improves torque output capability and the power density of motor.Such particular design not only avoid the problem of traditional flux switch motor stator cylindrical leakage field, improve the utilance of permanent magnet, and the degree of saturation of traditional flux switch permanent magnet motor stator tooth can be reduced, reduce iron loss during high speed operation of motor, limit the temperature rise of motor.
2, dual-rotor structure of the present invention is interconnected by circular disk, and on circular disk, be distributed with several circular port, makes air rotate with motor and in motor internal circulation, form the structure of radiator fan, effectively improves the heat dispersion of this motor.
3, stator of the present invention adopts without stator yoke type structural design, then in conjunction with birotor, makes adjacent permanent magnet on magnetic flux path, define obvious series circuit.Compare the traditional flux switch permanent magnet motor under parallel circuits, this motor significantly improves the easily saturated Technology Difficulties problem of such motor stator teeth portion, and effectively improves the utilance of permanent magnet.
4, modular stator iron core stator tooth of the present invention adopts novel " non-wait radian " to design, change and lie in magnetic coenergy in air gap to the direction of rotor relative position angular rate of change, the location torque that this motor ectonexine air gap is produced is cancelled out each other after superposition, to reach the object reducing to act on total location torque on Novel dual-rotor, and then obtaining the effect of torque ripple reduction, this is also another innovation of the present invention.
5, the present invention uses high-performance Ne-Fe-B permanent-magnet material and cheap non-rare-earth ferrite permanent magnetic material simultaneously, and ferrite and neodymium iron boron two kinds of permanent magnetic materials are connected mutually, and propose " magnetomotive force and magnetic flux equilibrium " principle, two type permanent magnetic materials keep strict restriction relation (thickness of ferrite permanent-magnet is three times of Nd-Fe-B permanent magnetic thickness) dimensionally, point out the performance of two kinds of permanent magnetic materials to greatest extent, ensure that motor relatively reduces the consumption of neodymium iron boron while high torque density and power density, thus significantly reduce the manufacturing cost of motor.
6, the present invention adopts mixing magnetic material module to be sandwiched in the structure of stator core module, and in mixing magnetic material module, ferrite is between inside and outside two pieces of NdFeB materials, thus avoid stator end magnetic saturation phenomenon when ferrite is positioned at stator end, also improve ferritic anti-degaussing ability simultaneously.
7, the mixing magnetic material module that the present invention adopts tangentially alternately magnetizes in a circumferential direction, makes the magnetic field of motor have poly-magnetic characteristic, and then improves the magnetic flux density of air gap.
8, the present invention only adopts a set of armature winding, thus avoids the Solution of Electromagnetic Field Penetration Problems that conventional double air gap permanent magnet motor brings owing to adopting two cover armature winding dexterously, thus ensure that the stability that motor normally runs and reliability.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is that the three-dimensional structure of a kind of automobile-used birotor flux switch motor of the present invention splits schematic diagram;
Fig. 2 is axial external view of the present invention;
Fig. 3 is the radial section schematic diagram of circular disk in Fig. 2;
Fig. 4 is the radial section enlarged diagram of the present invention after removing circular disk;
Fig. 5 is installation and the connected mode schematic diagram of stator structure in Fig. 4, permanent magnet magnetizing direction and armature winding;
Fig. 6 is structure and the physical dimension mark enlarged diagram of single hybrid permanent magnet module in Fig. 4;
Fig. 7 is the partial view that along the circumferential direction launches when operating in primary importance of the present invention and magnetic flux schematic diagram;
Fig. 8 is that the present invention runs to the magnetic flux schematic diagram of the second place from the primary importance 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 rotating shaft; 6. stator; 7. stator core module; 8. iron oxygen permanent magnet; 9. Nd-Fe-B permanent magnet; 10. hybrid permanent magnet module; 11. non-magnetic stator links; 12. armature winding; 13. armature slots; 14. circular vent; 15. rotor outer iron core salient poles; Iron core salient pole in 16. rotors.
Embodiment
See Fig. 1 and Fig. 2, the present invention is made up of birotor 1, stator 6, armature winding 12 and non-magnetic rotating shaft 5.Wherein, birotor 1 is made up of outer rotor iron core 2, internal rotor iron core 3 and circular disk 4, coaxial empty set internal rotor iron core 3 in outer rotor iron core 2, a fixed installation circular disk 4 on the same end face of axis of outer rotor iron core 2 and internal rotor iron core 3, by circular disk 4, outer rotor iron core 2 and internal rotor iron core 3 are fixed together, its connected mode is riveted joint or welding, makes birotor 1 one-tenth as a whole.Coaxial installation stator 6 between outer rotor iron core 2 and internal rotor iron core 3, the coaxial fixed cover of internal rotor iron core 3 is outside non-magnetic rotating shaft 5, like this, the present invention is set with by non-magnetic rotating shaft 5, internal rotor iron core 3, stator 6 and outer rotor iron core 2 concentric.Non-magnetic axle 5 is in the axial direction through birotor 1 and circular disk 4, and non-magnetic rotating shaft 5 drives whole birotor 1 coaxial rotation by internal rotor iron core 3.Due to the particular design of birotor 1, it is made spatially to form the rotating parts of a hollow cup-shaped.
Diametrically, there is the interior air gap of 0.6mm between the outer peripheral surface of internal rotor iron core 3 and the inner peripheral surface of stator 6, and the inner peripheral surface of the outer peripheral surface of stator 6 and outer rotor iron core 2 there is the outer air gap of 0.6mm.
Outer rotor iron core 2, internal rotor iron core 3 and stator 6 are all formed by the D23 silicon steel plate stacking of 0.35mm thickness, and stacking factor is 0.95.Non-magnetic rotating shaft 5 and circular disk 4 form by the non-magnet material that coefficient of heat transfer is higher.
See Fig. 3, in order to effectively improve the heat dispersion of motor of the present invention, the card of circular disk 4 is along the circumferential direction evenly distributed with four circular vent 14, the radius of each circular vent 14 is R 1, the centre distance of the distance of center circle circular disk 4 of 4 circular ports 14 is equal, is L 1.In motor rotary course, air in motor internal circulation, is conducive to the heat radiation of motor by the circular vent 14 on circular disk 4.
See Fig. 1, Fig. 4 and Fig. 5, outer rotor iron core 2 and internal rotor iron core 3 there is identical salient pole number N r.Radial centre lines between two adjacent outer rotor iron core salient poles 15 just overlaps with the center line of the internal rotor iron core salient pole 16 between these two outer rotor iron core salient poles 15, diametrically same, make outer rotor iron core salient pole 15 and internal rotor iron core salient pole 16 relative position in a circumferential direction just layout straggly like this.
Stator 6 is by threephase armature winding 12, N sindividual stator core module 7 and N sindividual armature slot 13 forms, N sindividual stator core module 7 is along the circumferential direction uniformly distributed, and stator core module 7 forms stator teeth, and be armature slot 13 between every two stator core modules 7, threephase armature winding 12 is placed in armature slot 13.Wherein, N s=3N c, N r=N s± K 1(K 1=1,2,3 ...), N ccoil number contained by single-phase winding, N s6,12 or 18, K can be got 1then get the integers such as 1,2,3 accordingly.
The centre of each stator core module 7 is radially fixedly embedded with a hybrid permanent magnet module 10, stator core module 7 and hybrid permanent magnet module 10 are sector structures, the external diameter of hybrid permanent magnet module 10 equals the external diameter of stator core module 7, and the internal diameter of hybrid permanent magnet module 10 equals the internal diameter of stator core module 7.Hybrid permanent magnet module 10 and stator core module 7 bond as a whole.
See Fig. 4 and Fig. 5, between every two stator core modules 7, be fixed connection by non-magnetic stator link 11.Time fixing, fix with a non-magnetic stator link 11 between the outward flange of every two stator core modules 7, fix with another non-magnetic stator link 11 between the inward flange of every two stator core modules 7, these two stator links 11 form by the non-magnet material that coefficient of heat transfer is higher.
Each hybrid permanent magnet module 10 is made up of the Nd-Fe-B permanent magnet 9 that one piece of iron oxygen permanent magnet 8 is identical with two pieces, iron oxygen permanent magnet 8 is in the middle of two pieces of Nd-Fe-B permanent magnets 9, iron oxygen permanent magnet 8 and Nd-Fe-B permanent magnet 9 are all sector structures, iron oxygen permanent magnet 8 links together with Nd-Fe-B permanent magnet 9 closed seamless of both sides, forms a complete hybrid permanent magnet module 10.And all circumferentially cutting orientation magnetizing identical with the magnetizing direction of two pieces of Nd-Fe-B permanent magnets 9 of one piece of iron oxygen permanent magnet 8 in same hybrid permanent magnet module 10, the magnetizing direction of two adjacent hybrid permanent magnet modules 10 is contrary.In Fig. 5, the inlet wire direction that "+" is armature winding 12, "-" is the outlet direction of armature winding 12, and A, B, C are motor three-phase windings.Wherein, every phase winding one is divided into N cgroup coil (corresponding, the quantity N of stator core module 7 sn when getting 6,12,18 cget 2,4,6), and every all centralized circle of phase coil around, and to be placed in armature slot 13.
See Fig. 6, all stator core modules 7 and hybrid permanent magnet module 10 all have same center of circle O, the axis coinciding of center of circle O and non-magnetic rotating shaft 5, stator 6 etc.Center of circle O is radius R to the distance of stator 6 inner ring si, center of circle O is radius R to the distance of stator 6 outer ring so, and 0.5R so<R si<0.6R so.The radian of two pieces of Nd-Fe-B permanent magnets 9 is equal, is all β ndFe; The radian of iron oxygen permanent magnet 8 is β ferrite.The radian measure beta of iron oxygen permanent magnet 8 ferritefor the radian measure beta of Nd-Fe-B permanent magnetic 9 ndFethree times.Minimum curvature shared between the side of each stator core module 7 to Nd-Fe-B permanent magnet 9 side is β s, for ensureing certain mechanical strength, β s> β ferrite+ 2 β ndFe.The radian of stator core module 7 is β m, β m=2 β s+ 2 β ndFe+ β ferrite.
See Fig. 7 and Fig. 8, during machine operation of the present invention, in this motor operation course, the magnetic flux (magnetic linkage) that the stator core module 7 of motor flows through can according to the diverse location switching direction of birotor 1.Be illustrated in figure 7 motor and operate in first position, when birotor 1 runs to the position shown in Fig. 7, the relative position of birotor 1 and stator 6 is: the direction of relative movement due to birotor 1 is clockwise, therefore by order is from left to right: the continuous print first of birotor 1 is relative with the 3rd stator core module 7 with first respectively with second outer rotor iron core salient pole 15; The continuous print first of birotor 1 is relative with the 4th stator core module 7 with second respectively with second internal rotor iron core salient pole 16.Now, the magnetic linkage of iron oxygen permanent magnet 8 and two pieces of Nd-Fe-B permanent magnet 9 generations is connected mutually, and with positive direction (clockwise direction) through armature winding 12.The path of the magnetic flux of iron oxygen permanent magnet 8 and two pieces of Nd-Fe-B permanent magnet 9 generations is as follows in the direction of the clock: successively through second piece of Nd-Fe-B permanent magnet 9, first piece of iron oxygen permanent magnet 8, first piece of Nd-Fe-B permanent magnet 9, first stator core module 7, outer air gap, first outer rotor iron core salient pole 15, external rotor yoke portion, second outer rotor iron core salient pole 15, outer air gap, 3rd stator core module 7, 3rd piece of Nd-Fe-B permanent magnet 9, second piece of iron oxygen permanent magnet 8, 4th piece of Nd-Fe-B permanent magnet 9, 4th stator core module 7, 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 stator core module 7.Therefore, when Fig. 7 position, the present invention has stronger poly-magnetic effect, can provide higher air gap 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, the continuous print first of birotor 1 is relative with the 4th stator core module 7 with second respectively with second outer rotor iron core salient pole 15; The continuous print first of birotor 1 is relative with the 3rd stator core module 7 with first respectively with second internal rotor iron core salient pole 16.Now, the magnetic linkage of iron oxygen permanent magnet 8 and two pieces of Nd-Fe-B permanent magnet 9 generations is connected mutually, and with opposite direction (counterclockwise) through armature winding 12.The path of the magnetic flux of iron oxygen permanent magnet 8 and two pieces of Nd-Fe-B permanent magnetic 9 generations is as follows in the direction of the clock: successively through the 3rd piece of Nd-Fe-B permanent magnet 9, second piece of iron oxygen permanent magnet 8, 4th piece of Nd-Fe-B permanent magnet 9, 4th stator core module 7, outer air gap, second outer rotor iron core salient pole 15, external rotor yoke portion, first outer rotor iron core salient pole 15, outer air gap, second stator core module 7, second piece of Nd-Fe-B permanent magnet 9, first piece of iron oxygen permanent magnet 8, first piece of 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, 3rd stator core module 7.Therefore, when Fig. 8 position, the present invention has stronger poly-magnetic effect, can provide higher air gap flux density.In addition, due to when the primary importance shown in Fig. 7, the magnetic flux of iron oxygen permanent magnet 8 and two pieces of Nd-Fe-B permanent magnet 9 generations is in a clockwise direction through armature winding 12, and when the second place shown in Fig. 8, this magnetic flux is counterclockwise to pass armature winding 12, thus, when switching the relative position of stator 6 and birotor 1 continuously, can induce in armature winding 12 and there is ambipolar alternation induced electromotive force.
See Fig. 9, Figure 10 and Figure 11, structural design of the present invention is adopted to compare the Distribution of Magnetic Field of traditional flux switch motor in Figure 10 and Figure 11, Distribution of Magnetic Field of the present invention is ingenious and efficiently avoid the problem of the serious leakage field in stator 6 outer ring, the present invention effectively by the permanent magnetic energy of the supersaturation part of traditional flux switch permanent magnet motor stator tooth, can be converted into the external magnetic field setting up motor.Therefore, the present invention not only can reduce the degree of saturation of traditional flux switch permanent magnet motor stator tooth, the electromagnetic torque acted on respectively on Novel dual-rotor inner and outer rotors iron core can also be made to superpose, thus effectively improve torque output capability and the power density of motor.
See Figure 12, be no-load back electromotive force oscillogram of the present invention, can find out, the unloaded counter potential waveform of the present invention demonstrates higher sine degree, and its most of harmonic content obtains canceling compensation, and is suitable for brushless ac controlling run.Therefore, special winding of the present invention is arranged, and has the complementary feature of winding.

Claims (6)

1. an automobile-used birotor flux switch motor, birotor (1) comprises outer rotor iron core (2) and internal rotor iron core (3), coaxial empty set internal rotor iron core (3) in outer rotor iron core (2), stator (6) is coaxially housed between outer rotor iron core (2) and internal rotor iron core (3), the coaxial fixed cover of internal rotor iron core (3) in non-magnetic rotating shaft (5) outward, interior air gap is had between internal rotor iron core (3) outer peripheral surface and stator (6) inner peripheral surface, stator (6) outer peripheral surface and outer rotor iron core (2) inner peripheral surface have outer air gap, it is characterized in that: stator (6) is by threephase armature winding, N sindividual stator core module (7) and N sindividual armature slot (13) forms, N s=3N c, N cfor the coil number of single-phase winding, N sindividual stator core module (7) is along the circumferential direction uniformly distributed, and be armature slot (13) between every two stator core modules (7), threephase armature winding is placed in armature slot (13), the centre of each stator core module (7) is radially fixedly embedded with a hybrid permanent magnet module (10), each hybrid permanent magnet module (10) is made up of the Nd-Fe-B permanent magnet (9) that one piece of iron oxygen permanent magnet (8) is identical with two pieces, iron oxygen permanent magnet (8) is in the middle of two pieces of Nd-Fe-B permanent magnets (9), and iron oxygen permanent magnet (8) is connected with Nd-Fe-B permanent magnet (9) closed seamless of both sides, iron oxygen permanent magnet (8) in same hybrid permanent magnet module (10) and all circumferentially cutting orientation magnetizing identical with the magnetizing direction of Nd-Fe-B permanent magnet (9), the magnetizing direction of two pieces of adjacent hybrid permanent magnet modules (10) is contrary.
2. a kind of automobile-used birotor flux switch motor according to claim 1, is characterized in that: outer rotor iron core (2) and internal rotor iron core (3) have identical salient pole number N r, N r=N s± K 1, K 1=1,2,3 ..., N cfor the coil number of single-phase winding; Radial centre lines between two adjacent outer rotor iron core salient poles (15) overlaps with the center line of internal rotor iron core salient pole (16) therebetween.
3. a kind of automobile-used birotor flux switch motor according to claim 1, it is characterized in that: outer rotor iron core (2) is fixedly connected with a circular disk (4) with the same end face of axis of internal rotor iron core (3), and the card of circular disk (4) is along the circumferential direction evenly distributed with four circular vent.
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) all have and non-magnetic rotating shaft (5), center of circle O that stator (6) is identical, and center of circle O is radius R to the distance of stator (6) inner ring si, to the distance of stator (6) outer ring be radius R so, and 0.5R so<R si<0.6R so.
5. a kind of automobile-used birotor flux switch motor according to claim 1, is characterized in that: stator core module (7), iron oxygen permanent magnet (8) and Nd-Fe-B permanent magnet (9) are all fan-shaped; The radian of Nd-Fe-B permanent magnet (9) is β ndFe, the radian of iron oxygen permanent magnet (8) is β ferrite, 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, is characterized in that: between the side of each stator core module (7) to Nd-Fe-B permanent magnet (9) side, shared minimum curvature is β s, β s> β ferrite+ 2 β ndFe.
CN201510755061.3A 2015-11-09 2015-11-09 A kind of automobile-used birotor flux switch motor Active CN105356699B (en)

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CN106505814A (en) * 2016-10-31 2017-03-15 东南大学 Modulate birotor brushless dual-feedback wind power generator in a kind of field
CN107863866A (en) * 2017-12-26 2018-03-30 南京玛格耐特智能科技有限公司 A kind of great-power electromagnetic buncher
CN113178963A (en) * 2021-05-20 2021-07-27 河北工业大学 Radial and axial double-modularization magnetic flux switching motor
CN114400855A (en) * 2022-01-24 2022-04-26 沈阳工程学院 Stator and rotor dual-modular permanent magnet synchronous motor
CN114915070A (en) * 2022-05-09 2022-08-16 山东大学 Rotor based on double V-shaped permanent magnets and high-speed axial flux permanent magnet motor

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CN106505814A (en) * 2016-10-31 2017-03-15 东南大学 Modulate birotor brushless dual-feedback wind power generator in a kind of field
CN106505814B (en) * 2016-10-31 2019-03-05 东南大学 A kind of modulation birotor brushless dual-feedback wind power generator
CN107863866A (en) * 2017-12-26 2018-03-30 南京玛格耐特智能科技有限公司 A kind of great-power electromagnetic buncher
CN107863866B (en) * 2017-12-26 2023-12-12 南京玛格耐特智能科技有限公司 High-power electromagnetic speed regulating motor
CN113178963A (en) * 2021-05-20 2021-07-27 河北工业大学 Radial and axial double-modularization magnetic flux switching motor
CN113178963B (en) * 2021-05-20 2022-10-14 河北工业大学 Radial and axial double-modularization magnetic flux switching motor
CN114400855A (en) * 2022-01-24 2022-04-26 沈阳工程学院 Stator and rotor dual-modular permanent magnet synchronous motor
CN114400855B (en) * 2022-01-24 2023-06-16 沈阳工程学院 Stator-rotor double-module permanent magnet synchronous motor
CN114915070A (en) * 2022-05-09 2022-08-16 山东大学 Rotor based on double V-shaped permanent magnets and high-speed axial flux permanent magnet motor
CN114915070B (en) * 2022-05-09 2024-01-09 山东大学 Rotor based on double V-shaped permanent magnets and high-speed axial flux permanent magnet motor

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