CN105811696B - Composite excitation type compound flux switch permanent magnet motor - Google Patents

Composite excitation type compound flux switch permanent magnet motor Download PDF

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Publication number
CN105811696B
CN105811696B CN201610267296.2A CN201610267296A CN105811696B CN 105811696 B CN105811696 B CN 105811696B CN 201610267296 A CN201610267296 A CN 201610267296A CN 105811696 B CN105811696 B CN 105811696B
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China
Prior art keywords
stator
motor
permanent magnet
rotor
magnet
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CN105811696A (en
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花为
周令康
曹平
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DALIAN MINGYANG INDUSTRIAL Co Ltd
Southeast University
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DALIAN MINGYANG INDUSTRIAL Co Ltd
Southeast University
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/14Stator cores with salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/18Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/24Rotor cores with salient poles ; Variable reluctance rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28Layout of windings or of connections between windings

Abstract

Composite excitation type compound flux switch permanent magnet motor, including internal rotor, inner stator, magnet isolation tank, magnetic conduction bridge, external stator and outer rotor, stationary part employs concentration armature winding, permanent magnet is nested on stator tooth, rotor portion is salient pole, and both without permanent magnet or without winding, central excitation winding is placed in magnet isolation tank between interior external stator, magnet isolation tank is connected by magnetic conduction bridge, and structure is very firm symmetrical.Remain that permanent magnet flux switching motor is compact, simple, robustness is good, advantage suitable for high-speed cruising in structure;Big permanent-magnetic electric machine torque output, power density height, efficient advantage are remained in performance;Increased a set of electrical excitation winding can again can adjustable magnetic every magnetic;Armature and excitation double winding in motor all use concentratred winding, and end is shorter;Simple with existing mixed excitation electric machine structure compared, Exciting Windings for Transverse Differential Protection will not occupy the groove area of armature winding, instead can bidirectional modulation motor-field.

Description

Composite excitation type compound flux switch permanent magnet motor
Technical field
Technical field more particularly to a kind of motor that can realize composite excitation function the present invention relates to motor manufacturing.
Background technology
With the continuous aggravation of energy crisis, permanent magnet excitation substitution electrical excitation is used to become full generation to save energy consumption The common recognition on boundary, simultaneously because China is the country that rare earth resources are most abundant in the world, developmental research and popularization and application new structure Rare-earth permanent-magnet electric machine, have important theory significance and practical value.The hybrid vehicle particularly studied extensively at present, It is required that motor driven systems therein are small, light-weight, efficient, highly reliable, non-maintaining, torque is contributed big, speed governing model Enclose width.However, due to magneto itself, there are the bottlenecks that air-gap field can not be adjusted, and limit it in hybrid vehicle Application.
Most of magneto zero load permanent magnet flux linkage is both greater than the product of d-axis inductance and rated current, magneto It is a pair of contradiction that can not be reconciled between the torque capacity in permanent torque area and the highest running speed in invariable power area:On the one hand, Increase permanent magnet flux linkage can no doubt improve the torque capacity fan-out capability of motor, while the high-speed cruising of meeting limiting motor(Due to Continuous increased no-load back electromotive force);On the other hand, when the d-axis inductance of the electric current limit of inverter and motor is fixed, subtract Small permanent magnet flux linkage is conducive to improve the output-constant operation range of motor but can torque-limiting output.Therefore, above-mentioned magneto Shortcoming is into the bottleneck for limiting its application.And the mixed excitation electric machine using rotor permanent magnet type motor as prototype occurred at present It is most of that DC excitation winding is all placed into stator.In order to electro-magnetic flux provide one it is whether radially or axial and forever The parallel path of magnetic magnetic flux, the electric machine structure proposed is all extremely complex, no matter being given birth on a large scale from manufacturing process or finished productization For production, huge challenge is all suffered from.If the motor of composite excitation type in order to realize the adjusting in magnetic field and from structure complexity On need to make great sacrifice, competitiveness will have a greatly reduced quality.
On the other hand, occurs the stator permanent magnetic type electric of three kinds of new structures successively in the world from the end of last century, i.e., Doubly salient permanent magnet motor, flux switch permanent magnet motor and flux-reversal magneto, structural commonality are by permanent magnet and armature Winding is all placed in stator, and rotor is only made of soft magnetic materials such as silicon steel sheets.For the above two composite excitation organization plan all It proposes, the present invention is exactly that a kind of composite excitation type magnetic flux of new structure is proposed on flux-reversal permanent magnet motor structure basis Reverse motor to avoid there is labyrinth, and tries hard to keeping not doing material alteration on pure permanent-magnetic electric machine basis Realize composite excitation function.
Invention content
The purpose of the present invention is propose that a kind of mixing of new structure is encouraged on flux-reversal permanent magnet motor structure basis Magnetic-type magnetic flux reverse motor to avoid there is labyrinth, and tries hard to not do on the pure permanent-magnetic electric machine basis of holding great Composite excitation function can be realized in modification.
Present invention technical solution used for the above purpose is:Composite excitation type compound flux switches Permanent Magnet and Electric Machine, including internal rotor 3-1, inner stator 3-3, magnet isolation tank 2-2, magnetic conduction bridge 2-1, external stator 1-3 and outer rotor 1-1, external stator 1-3 Positioned at the inside of outer rotor 1-1, outer-rotor structure is formed, outer rotor 1-1 and external stator 1-3 are salient-pole structure, each outer fixed Nested outer motor permanent magnet 1-2, external stator tooth are equipped with armature winding 1-4 in outer motor three-phase set on sub- tooth;Internal rotor 3-1 In the inside of inner stator 3-3, inner rotor core is formed, internal rotor 3-1 and inner stator 3-3 are salient-pole structure, each inner stator Motor permanent magnet 3-2 in nesting on tooth, inner stator tooth are equipped with armature winding 3-4 in interior motor three-phase set;Magnetic conduction bridge(2-1)With Magnet isolation tank 2-2 is distributed between external stator 1-3 and inner stator 3-3, and magnet exciting coil 2-3 is equipped in magnet isolation tank 2-2;Often set is fixed Son often covers two pieces of permanent magnet polarities under stator tooth on the contrary, the magnet steel polarity under adjacent stators tooth is divided containing inside and outside two stators Cloth interlocks;Each magnet exciting coil 2-3 connects with adjacent magnet exciting coil 2-3 reverse phases in magnet isolation tank 2-2, forms single-phase Exciting Windings for Transverse Differential Protection.
The magnetic conduction bridge 2-1 is formed by silicon steel plate stacking, and thickness is the 1/3 of stator yoke thickness.
Armature winding 3-4 and magnet exciting coil 2-3 in armature winding 1-4, interior motor three-phase set in the outer motor three-phase set It is concentratred winding.
The internal rotor 3-1 and outer rotor 1-1 is straight trough or skewed rotor.
The external stator 1-3 and inner stator 3-3 is that magnetic conductive iron and permanent magnet are assembled, and core portion is by magnetic conduction iron The heart forms.
The present invention composite excitation type compound flux switch permanent magnet motor, one side stationary part employ concentrate armature around Group, permanent magnet are nested on stator tooth, and rotor portion is salient pole, both without permanent magnet or without winding, in another aspect between external stator Central excitation winding is placed in magnet isolation tank, and magnet isolation tank is connected by magnetic conduction bridge, and structure is very firm symmetrical, a phase armature around The electromagnetic performance of several concentration armature coils of group is controlled by corresponding excitation winding pole coil by exciting current.In structure On remain that permanent magnet flux switching motor is compact, simple, robustness is good, advantage suitable for high-speed cruising;It is remained in performance Permanent-magnetic electric machine torque is contributed, and big, power density is high, efficient advantage;Increased a set of electrical excitation winding can again may be used every magnetic Adjustable magnetic;Armature and excitation double winding in motor all use concentratred winding, and end is shorter;With existing mixed excitation electric machine (Including rotor permanent magnet type and stator permanent magnetic type)Structure compared is simple, and Exciting Windings for Transverse Differential Protection will not occupy the groove area of armature winding, instead It and can bidirectional modulation motor-field;Particularly suitable for requiring small big application scenario of contributing, permanent torque area can be realized Big torque and the wide range speed control function in invariable power area.
Description of the drawings
Fig. 1 is composite excitation type compound flux switch permanent magnet motor structure chart of the present invention.
Fig. 2 is composite excitation type compound flux switch permanent magnet motor schematic diagram of the present invention.
In figure:Armature winding 1-4 in outer rotor 1-1, outer motor permanent magnet 1-2, external stator 1-3, outer motor three-phase set, it leads Magnetic bridge 2-1, magnet isolation tank 2-2, magnet exciting coil 2-3, internal rotor 3-1, interior motor permanent magnet 3-2, inner stator 3-3, interior motor three-phase Concentrate armature winding 3-4, external structure permanent magnet flux path 4-1, external structure magnetic flux path 4-2, internal structure permanent magnetism Magnetic flux path 5-1, internal structure magnetic flux path 5-2.
Specific embodiment
The present invention composite excitation type compound flux switch permanent magnet motor structure as shown in Figure 1, including:Stator, permanent magnet, Armature winding in three-phase set, single-phase central excitation winding, magnet isolation tank 2-2, magnetic conduction bridge 2-1 and rotor, structure can be equivalent to lead to The complex of two permanent magnet flux switching motors that magnetic conduction bridge is connected with magnet isolation tank is crossed, structure is respectively from inside to outside:Internal rotor 3-1, inner stator 3-3, magnet isolation tank 2-2, magnetic conduction bridge 2-1, external stator 1-3 and outer rotor 1-1, external stator 1-3 are located at outer rotor 1-1 Inside, form outer-rotor structure, outer rotor 1-1 and external stator 1-3 are salient-pole structure, and wherein external stator core portion is by leading Magnetic core forms, nested outer motor permanent magnet 1-2 on each stator tooth, and outer motor three-phase set is provided on outer stator tooth Middle armature winding 1-4;Magnetic conduction bridge 2-1 and magnet isolation tank 2-2 are distributed between external stator 1-3 and inner stator 3-3, magnet isolation tank 2- Magnet exciting coil 2-3 is placed in 2;Internal rotor 3-1 is located at the inside of inner stator 3-3, forms inner rotor core, internal rotor 3-1 and interior All for salient-pole structure, wherein internal stator iron core part is made of stator 3-3 magnetic conductive iron, and motor is forever in nesting on each stator tooth Magnet 3-2, and armature winding 3-4 in interior motor three-phase set is provided on interior stator tooth.Magnet isolation tank 2-2 and magnetic conduction bridge 2-1 It is distributed between inner stator 3-3 and external stator 1-3.Often set stator contains inside and outside two stators, such as stator tooth A1 and stator Tooth a1.Embedded with permanent magnet in each stator core, two pieces of permanent magnet polarities under stator tooth are often covered on the contrary, and under adjacent stators tooth Magnet steel polarity distribution interlock, i.e., permanent magnet polarity distribution is if N-S under first set stator tooth, then that set stator adjacent thereto Permanent magnet polarity under tooth is S-N.Magnet exciting coil is placed in magnetic conductive groove, is haved the function that every magnetic and adjustable magnetic.If inside and outside stator tooth Number is allP s , then one 2 are sharedP s Block permanent magnet is nested in stator tooth, and one is sharedP s A magnet isolation tank is supplied to Exciting Windings for Transverse Differential Protection.Often cover three Each coil of armature winding is mutually concentrated to be across on every set stator tooth, wherein, by taking external stator as an example, armature winding in three-phase set One is sharedP s It is a concentration armature coil be alternately distributed successively with the sequence of ABC three-phases, per mutually byP s / 3 armature coil compositions, belong to 1080 are differed each other in each coil space of same phaseo/P s (Space mechanism angle).If with 12 slots of a stator, rotor 10 For the composite excitation compound flux switch permanent magnet motor of pole, then first armature coil, the 4th is concentrated to concentrate armature coil, the 7th Concentrate armature coil and the tenth concentration armature coil(Space difference 90o), sequence series winding(Or and even)Afterwards composition A phases armature around Group;Then second concentrate armature coil, the 5th that armature coil, the 8th is concentrated to concentrate armature coil and the 11st concentration armature coil (Space difference 90o), sequence series winding(Or and even)B phase armature winding is formed afterwards;Then third concentrates armature coil, the 6th to concentrate electricity Pivot coil, the 9th concentrate armature coil and the 12nd concentration armature coil(Space difference 90o), sequence series winding(Or and even)Group afterwards Into C phase armature winding;For forming 4 armature winding coils of A phases, four concentrating coils in any rotor-position, The magnetic linkage quantity same direction of linkage is identical in winding, directly forms A phases to series winding, similar with C phase situations to B phases.Armature around Group is concentratred winding, and Exciting Windings for Transverse Differential Protection is also concentratred winding, each central excitation coil and adjacent magnet exciting coil reverse phase in magnet isolation tank Series connection, forms single-phase Exciting Windings for Transverse Differential Protection.Interior external stator is that magnetic conductive iron and permanent magnet are assembled.Magnetic conduction bridge is by silicon steel plate stacking It forms, thickness is typically designed as the 1/3 of stator yoke thickness.Rotor is straight trough or skewed rotor, both without permanent magnet on rotor Also without winding.Permanent magnet is the other types permanent-magnet material such as ferrite, SmCo or neodymium iron boron.
In the obstructed electric current of Exciting Windings for Transverse Differential Protection, due to magnetic conduction bridge 2-1 very thin thickness, permanent magnetic potential is larger, and magnetic conduction bridge 2-1 is easily Saturation is led, the structure can regard mutually independent two permanent magnet flux switching motors as at this time.The present invention increases between interior external stator Magnet isolation tank 2-2 and magnetic conduction bridge 2-1 are added, and magnet exciting coil 2-3 are placed in magnet isolation tank 2-2, the effect of weak magnetism speed expansion can be played Fruit.Corresponding direct current exciting current is passed through to magnet exciting coil 2-3, makes its generation opposite with permanent magnetic potential direction in magnetic conduction bridge 2-1 Electrical excitation magnetic potential, at this time permanent magnetic potential also need to offset the electrical excitation magnetic opposite with its direction while magnetic conduction bridge saturation is ensured Gesture, therefore, the permanent magnet flux linkage in stator will be weakened.By adjusting the size of magnet isolation tank 2-2 groove areas and exciting current density, Adjustable electrical excitation magnetic potential size, so as to be required according to designer, reaches adjustable magnetic expansion speed purpose, overcomes pure permanent-magnetic electric machine The shortcomings that middle.
If Fig. 1 is by taking fixed inside and outside one/rotor is the pole motor of 12 slots/10 as an example, external stator 1-3 has 12 teeth, Mei Geding Nested outer motor permanent magnet 1-2 on sub- tooth, and armature winding 1-4 in outer motor three-phase set is provided on outer stator tooth;It is interior Stator 3-3 has 12 teeth, motor permanent magnet 3-2 in nesting on each stator tooth, and interior motor is provided on interior stator tooth Armature winding 3-4 in three-phase set;Four winding coils of A phases of outer armature winding 1-4 are respectively sleeved in external stator 1-3 each In two side channels of tooth, and four concentratred winding coils contact form A phases in the same direction;Four windings of B phases of outer armature winding 1-4 Coil is respectively sleeved in external stator 1-3 in two side channels of each tooth, and four concentratred winding coils contact form A phases in the same direction;Outside Four winding coils of C phases of armature winding 1-4 are respectively sleeved in external stator 1-3 in two side channels of each tooth, and four collection Middle winding coil is contacted in the same direction forms A phases;Four winding coils of A phases of interior armature winding 3-4 are respectively sleeved in external stator 3-3 In each tooth two side channels in, and four concentratred winding coils are contacted composition A phases in the same direction;The B phases four of interior armature winding 3-4 A winding coil is respectively sleeved in external stator 3-3 in two side channels of each tooth, and four concentratred winding coils contact form B in the same direction Phase;Four winding coils of C phases of interior armature winding 3-4 are respectively sleeved in external stator 3-3 in two side channels of each tooth, and four A concentratred winding coil is contacted in the same direction forms C phases;Exciting Windings for Transverse Differential Protection 2-3 mono- shares 12 concentrating coils, is placed in inside and outside stator between cog Magnet isolation tank in.Two coil energization polarity in each magnet isolation tank are consistent, an adjacent reverse phase series connection of 12 Exciting Windings for Transverse Differential Protection Connection forms single-phase double-deck Exciting Windings for Transverse Differential Protection.Contain 12 stator tooths in interior external stator 1-3,3-3, each stator is nested forever Magnet often covers the permanent magnet polarity under stator tooth on the contrary, the i.e. same inner stator radially permanent magnet nested with external stator Polarity is opposite.Also, tangential adjacent permanent magnet polarity is opposite.
As shown in Fig. 2, when rotor is in this position, inner and outer rotors align there are one tooth with stator tooth, according to The direction of magnetization of permanent magnet, the permanent magnet flux direction values in two armature coils are maximum.Therefore, if being applied by magnetic winding coil Add the electrical excitation magnetic potential opposite with permanent magnetic potential direction, make the electro-magnetic flux of generation with permanent magnet flux direction on the contrary, then can be with Synthesis magnetic linkage inside and outside reducing simultaneously in armature coil, and then reduce the potential sensed in armature winding.Such as permanent magnet flux linkage in Fig. 2 Shown in 4-1, when rotor position shown in Fig. 2, in addition for motor, external stator 1-3 is there are one tooth with outer rotor 1-1's Rotor tooth is opposite, is differentiated according to the direction of magnetization of permanent magnet, and the permanent magnet flux of linkage is pierced by the stator tooth in coil, by air gap Rotor pole is penetrated, permanent magnet flux numerical value is maximum at this time.Weak magnetoelectricity stream is passed through to Exciting Windings for Transverse Differential Protection, it is opposite with permanent magnetic potential by generating Electrical excitation magnetic linkage, as shown in excitation flux linkage 4-2 in Fig. 2, excitation flux linkage is pierced by rotor tooth, by air gap, penetrates stator, reduces The magnetic flux of armature coil institute linkage, so as to reduce the potential induced.Equally, internal structure has identical work original Reason.Simultaneously using the excitation source of electrical excitation and permanent magnet as motor, motor gas-gap field controllable can be greatly improved, so as to Improve motor performance and working efficiency.
Permanent magnet 1-2,3-2 of external and internal compositions are the other types permanent-magnet materials such as ferrite, SmCo or neodymium iron boron, inside and outside Stator 1-3,3-3, inner and outer rotors 1-1,3-1 and magnetic conduction bridge can be made of silicon steel punched chip laminated, between interior external stator The magnet isolation tank 2-2 outputed is used to place Exciting Windings for Transverse Differential Protection.
In addition, the characteristics of on the electric machine structure causes, its unloaded air gap flux density is larger, and motor has stronger torque Fan-out capability, power density are higher;Meanwhile armature winding and Exciting Windings for Transverse Differential Protection are all concentratred windings, end is short, and resistance is smaller, effect Rate is higher.
The present invention is described by embodiment, and those skilled in the art know, in the spirit for not departing from the present invention In the case of range, various changes or equivalence replacement can be carried out to these features and embodiment.In addition, in the religion of the present invention It leads down, can modify to adapt to the essence of particular situation and material without departing from the present invention to these features and embodiment God and range.Therefore, the present invention is not limited to the particular embodiment disclosed, and falls with claims hereof In the range of embodiment belong to protection scope of the present invention.

Claims (5)

1. composite excitation type compound flux switch permanent magnet motor, it is characterised in that:Including internal rotor(3-1), inner stator(3-3)、 Magnet isolation tank(2-2), magnetic conduction bridge(2-1), external stator(1-3)And outer rotor(1-1), external stator(1-3)Positioned at outer rotor(1-1)'s Inside forms outer-rotor structure, outer rotor(1-1)And external stator(1-3)It is salient-pole structure, it is nested outer on each external stator tooth Motor permanent magnet(1-2), external stator tooth is equipped with armature winding in outer motor three-phase set(1-4), armature in outer motor three-phase set Winding(1-4)It is across on external stator tooth;Internal rotor(3-1)Positioned at inner stator(3-3)Inside, form inner rotor core, it is interior Rotor(3-1)And inner stator(3-3)All it is salient-pole structure, motor permanent magnet in nesting on each inner stator tooth(3-2), inner stator Tooth is equipped with armature winding in interior motor three-phase set(3-4), armature winding in interior motor three-phase set(3-4)It is across inner stator tooth On;Magnetic conduction bridge(2-1)And magnet isolation tank(2-2)It is distributed in external stator(1-3)And inner stator(3-3)Between, magnet isolation tank(2-2) It is interior to be equipped with magnet exciting coil(2-3);Often set stator contains inside and outside two stators, often covers two pieces of permanent magnet polarity phases under stator tooth Instead, the magnet steel polarity distribution under adjacent stators tooth is interlocked;Magnet isolation tank(2-2)In each magnet exciting coil(2-3)With adjacent excitation wire Circle(2-3)Reverse phase is connected, and forms single-phase Exciting Windings for Transverse Differential Protection.
2. composite excitation type compound flux switch permanent magnet motor according to claim 1, it is characterised in that:The magnetic conduction bridge (2-1)It is formed by silicon steel plate stacking, thickness is the 1/3 of stator yoke thickness.
3. composite excitation type compound flux switch permanent magnet motor according to claim 1, it is characterised in that:The outer motor Armature winding in three-phase set(1-4), armature winding in interior motor three-phase set(3-4)And magnet exciting coil(2-3)It is concentratred winding.
4. composite excitation type compound flux switch permanent magnet motor according to claim 1, it is characterised in that:The internal rotor (3-1)And outer rotor(1-1)For straight trough or skewed rotor.
5. composite excitation type compound flux switch permanent magnet motor according to claim 1, it is characterised in that:The external stator (1-3)And inner stator(3-3)It is that magnetic conductive iron and permanent magnet are assembled, and core portion is made of magnetic conductive iron.
CN201610267296.2A 2016-04-27 2016-04-27 Composite excitation type compound flux switch permanent magnet motor Active CN105811696B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106787307B (en) * 2017-03-09 2018-10-23 东南大学 Rotor adjustable magnetic type flux switch motor
CN107959365A (en) * 2017-11-22 2018-04-24 哈尔滨理工大学 Magnetic flux adjustable type magnetic gear compound machine
CN110957822B (en) * 2019-12-09 2021-01-19 齐鲁工业大学 Birotor magnetic flux switches aerogenerator and power generation system

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FR2769423B1 (en) * 1997-10-07 1999-12-24 Valeo Equip Electr Moteur Electric machine with double excitation, and particularly a motor vehicle alternator
CN101834474A (en) * 2010-03-17 2010-09-15 常州工学院 Multitooth magnetic bridge type hybrid excitation magnetic flux switching motor
CN102832771B (en) * 2012-08-03 2015-02-18 东南大学 Combined-type flux switching permanent magnet motor
CN104362822B (en) * 2014-10-24 2017-02-22 东南大学 Self-flux-weakening composite flux-switching permanent-magnet motor

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