CN105337429B - A kind of hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switches memory electrical machine - Google Patents
A kind of hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switches memory electrical machine Download PDFInfo
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- CN105337429B CN105337429B CN201510756639.7A CN201510756639A CN105337429B CN 105337429 B CN105337429 B CN 105337429B CN 201510756639 A CN201510756639 A CN 201510756639A CN 105337429 B CN105337429 B CN 105337429B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The present invention discloses a kind of hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switching memory electrical machine, including external stator, interior subregion stator and center roller, interior subregion stator is to be brought into close contact inside and outside double-layer structure together, outer layer is made up of internal stator iron core and Nd-Fe-B permanent magnet, Nd-Fe-B permanent magnet is along the circumferential direction uniformly embedded into internal stator iron core, Nd-Fe-B permanent magnet cutting orientation magnetizing, the magnetizing direction of two adjacent two Nd-Fe-B permanent magnets are opposite；Internal layer is by impulse magnetization winding and can be formed in the Al-Ni-Co permanent magnet of micro USB degaussing, Al-Ni-Co permanent magnet is evenly distributed in the circumferential direction, there is default pilot trench between two neighboring Al-Ni-Co permanent magnet, the impulse magnetization winding of head and the tail series connection is placed in each default pilot trench and is wound on Al-Ni-Co permanent magnet successively, permanent magnet dosage and armature winding dosage under same motor volume are increased to lift torque density, the intensity of magnetization of energy on-line control Al-Ni-Co permanent magnet, has broad speed adjustable range.
Description
Technical field
The invention belongs to field of motor manufacturing, is related to permanent magnet flux switching motor and memory electrical machine, for driving mixing dynamic
Power automobile, electric automobile.
Background technology
As hybrid vehicle, the automobile drive motor of one of the crucial execution unit of electric automobile, its driveability
Quality directly affect the vehicle performance of hybrid vehicle, electric automobile.In automobile drive motor field, application is the widest
General is permagnetic synchronous motor, and the permagnetic synchronous motor using neodymium iron boron as excitation material has the advantages that high efficiency, high power density.
Compared with traditional rotor permanent magnet type permagnetic synchronous motor, both without permanent magnet or without winding, tool on stator permanent magnetic type electric rotor
There is the advantages of Stability Analysis of Structures, installation are simple, radiating is convenient, rotary inertia is small, suitable high-speed cruising.The wherein magnetic of stator permanent magnetic type
Logical switch permanent magnet motor, by the torque and power density of its special poly- magnetic effect motor compared with double salient-pole electric machine and magnetic flux
Reverse motor can accomplish it is higher, more suitable for strict limiting motor size simultaneously again need compared with high output electric automobile lead
Domain.However, either traditional permagnetic synchronous motor or flux switch permanent magnet motor are due to using permanent magnetic steel as single
Excitation source, air-gap field is constant, when needing weak magnetic speed-up to run, often can only pass through application by the way of vector controlled
The d-axis weak magnetoelectricity stream component of lasting armature supply weakens air-gap field, is limited by armature supply size, inverter capacity etc.
System, thus electric machine speed regulation scope is very limited, and weak magnetic speed-up section is less efficient.
To widen the speed adjustable range of magneto, more feasible scheme is to use composite excitation technology, China Patent No.
It is for the hybrid exciting synchronous motor that is proposed in ZL200720035049.6 patent document, China Patent No.
The double salient pole, mixed excitation brushless and China Patent No. proposed in ZL200410064871.6 patent document be
The mixed excited magnetic pass switch motor proposed in ZL200810023819.4 patent document all draws on the basis of magneto
Enter electrical excitation winding, the regulation in motor gas-gap magnetic field is realized by the size and Orientation of electrical excitation electric current, there are adjustable magnetic means
Simply, the advantages that facilitating, but due to the presence of electrical excitation winding, motor is when carrying out weak magnetic and increasing magnetic speed regulating control, it is necessary to one
It is straight to apply electrical excitation electric current, extra excitation loss be present, have impact on the operational efficiency of motor.
It is a kind of real to be taught by German motor scholar Ao Situoweiqi (Ostovic) in the memory electrical machine proposed in 2001
Magnetic flux controllable type motor in meaning, it uses the alnico permanent magnetic material of high-remanence low-coercivity, by stator winding or
Magnetic field caused by DC pulse winding, the magnetized state of permanent magnet can be changed by moment, and its level of magnetization can be remembered, from
And the regulation to air-gap field is realized, armature loss is avoided, realizes online efficient adjustable magnetic.In addition, the two kinds of quadrature axis occurred
Magnetic resistance enhanced memory electrical machine, bigger magnetic flux adjustable range is realized by rationally designing leakage path.However, conventional memory is electric
Because permanent magnet is on rotor in machine, armature winding needs to be provided simultaneously with energy conversion and the ability of flux control, armature electricity
The quadrature axis component of stream interacts with motor-field, exports electromagnetic torque, undertakes the effect of energy converting between mechanical；Its direct-axis current
Component is mainly used in that motor-field is adjusted.How to ensure to realize during motor even running the dynamic of the magnetic field of motor
State, on-line control, the requirement of harshness is proposed to the vector controlled performance of motor, therefore online adjustable magnetic difficulty is larger；Next, by
In use only single Al-Ni-Co permanent magnet Nd-Fe-B permanent magnetic is extremely difficult to as excitation source, the maximum air gap magnetic flux density of motor
The level of motor, motor energy index be not high；Meanwhile increase magnetic and degaussing magnetic flux and carried by armature winding application direct-axis current pulse
For, increasing and magnetic loop or go in magnetic loop the larger air gap of magnetic resistance be present, it is larger that this results in required adjustable magnetic pulse magnetomotive force,
Add the electric current and the number of turn of armature winding.
The wide speed-adjusting magnetic flux memory formula stator that its is proposed is forever in the patent document that China Patent No. is ZL200810023409.X
The E type stator core Magneticflux-switching types proposed in magnetic-type motor and the patent document that China Patent No. is ZL201410756127.6
Although hybrid permanent magnet memory electrical machine can realize effective regulation of air-gap field, permanent magnet and winding are respectively positioned on stator, permanent magnetism
Body and armature winding dosage mutually limit, and limit the torque density of motor.
It can be seen that in the prior art, the motor such as " mixed excitation electric machine " and " permanent magnetism memory electrical machine ", realizing motor
Effective regulation of air-gap field effectively widens electric machine speed regulation scope etc. with reaching while control, guarantee motor energy index
It is difficult to take into account, this also turns into one of existing technological difficulties with general character of magneto technical field.
The content of the invention
The present invention seeks to：Be difficult to adjust to solve conventional permanent magnet motor air-gap field, speed adjustable range is narrow, high speed when it is defeated
The problem of going out power and low efficiency, there is provided a kind of rotor structure is simple, using hybrid permanent magnet material, has high efficiency, high torque (HT)
The hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switching memory electrical machine of density, wide range speed control range of operation.
To achieve the above object, the technical solution adopted by the present invention is：Including external stator, interior subregion stator and middle turn
Son, external stator are made up of external stator tooth, external stator groove and external stator yoke, and external stator tooth is distributed uniformly and circumferentially and determined outside
Threephase armature winding is wound with sub- tooth, the interior subregion stator is to be brought into close contact inside and outside double-layer structure together, and outer layer is by interior
Stator core and Nd-Fe-B permanent magnet composition, Nd-Fe-B permanent magnet are along the circumferential direction uniformly embedded into internal stator iron core, neodymium iron boron
The center of permanent magnet and the external stator tooth center alignment of external stator, Nd-Fe-B permanent magnet cutting orientation magnetizing, two adjacent two neodymium iron borons are forever
The magnetizing direction of magnet is opposite；Internal layer is by impulse magnetization winding and can be formed in the Al-Ni-Co permanent magnet of micro USB degaussing, aluminium nickel cobalt
Permanent magnet is evenly distributed in the circumferential direction, center and the center alignment of external stator groove, has between two neighboring Al-Ni-Co permanent magnet
The impulse magnetization winding of default pilot trench, the center of default pilot trench and the external stator tooth center alignment of external stator, successively head and the tail series connection
It is placed in each default pilot trench and is wound on Al-Ni-Co permanent magnet.
The present invention this have the advantage that after using above-mentioned technical proposal：
1st, the present invention is made full use of motor internal space, is solved biography using the inside and outside double-stator structure of default child partition
The problem of system flux switch motor permanent magnet and armature winding dosage mutually limit so that permanent magnet is used under same motor volume
Amount and armature winding dosage can increase to lift torque density, are also used as and encouraged using different type permanent-magnet material for such motor
The dosage of magnetic source and the non-rare earth permanent-magnetic material of increase provides enough spaces, close to lift few terres rares magneto power
Degree and torque density provide possibility.
2nd, because motor of the present invention employs stator permanent magnetic type structure, Nd-Fe-B permanent magnet, Al-Ni-Co permanent magnet and arteries and veins
Punching magnetization winding is placed on interior subregion stator, and armature winding is placed on external stator, realizes armature winding and permanent magnet
Separation, it is easier to radiating, the cooling of motor.
3rd, center roller is simple in construction used by motor of the present invention, both without permanent-magnet material, also without winding, only by magnetic conduction iron
The heart and non-magnet material are alternately formed, especially suitable for high-speed cruising.
4th, the armature winding used in motor of the present invention and impulse magnetization winding use centralized winding, reduce winding terminal
Minister's degree, so as to effectively reduce copper wastage, improve motor operation efficiency.Magnetic field on-line control means are simple, direct simultaneously.By
In the magnetizing current duration it is shorter (<1s), motor is made while more wide speed regulating range is realized higher operation to be kept to imitate
Rate.
5th, motor of the present invention is made using rare earth permanent magnet neodymium iron boron and the two kinds of permanent-magnet material of non-rare earth Al-Ni-Co permanent magnet
For the main excitation source of motor, two kinds of permanent magnetism can constrain and limit two kinds forever according to the overload capacity of motor and the requirement of speed adjustable range
Relation between the dosage (width and thickness) of magnetic material, magnetize the size and Orientation of winding current in short-term by controlling, can be
The intensity of magnetization of line regulation Al-Ni-Co permanent magnet and operating point, the weak magnetic control of motor on the one hand can be achieved, make motor that there is broadness
Speed adjustable range；Increasing magnetic control can also be carried out, meets big turn needed for electric automobile fast starting, climbing and brake hard
The requirement of square.
Brief description of the drawings
Fig. 1 is a kind of radial section of hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switching memory electrical machine of the present invention
Structural representation, the wherein direction of arrow represent permanent magnet magnetizing direction；
Fig. 2 is the structure enlargement diagram of interior subregion stator in Fig. 1；
Fig. 3 is the structure enlargement diagram of center roller in Fig. 1；
Fig. 4, Fig. 5, Fig. 6 be the present invention center roller is under diverse location and Al-Ni-Co permanent magnet fills degaussing different situations
Under, permanent magnetic circuit and magnetic direction schematic diagram；
Fig. 7 is the equivalent magnetic circuit figure of motor of the present invention；
Fig. 8 is that Al-Ni-Co permanent magnet is in the case of the limit fills degaussing in Fig. 2, armature winding zero load counter potential waveform figure.
In figure：1. external stator；1-1. armature winding；Subregion stator in 2.；2-1. Nd-Fe-B permanent magnet；2-2. aluminium nickel cobalt is forever
Magnet；2-3. impulse magnetization windings；2-4. internal stator iron core；2-4-1. boss；2-5. magnetic conduction bridges；3. center roller；3-1. lead
Magnetic patch；Non-magnetic piece of 3-2..
Embodiment
Referring to Fig. 1, Fig. 1 is by taking the pole motor of 6 grooves/5 poles of rotor/inner stator 6 as an example.Motor of the present invention includes external stator
1st, interior subregion stator 2 and center roller 3.External stator 1, center roller 3 and interior subregion stator 2 are coaxially arranged from outside to inside.It is outer fixed
The outer air gap of radial direction is respectively provided between son 1 and center roller 3, the interior gas between interior subregion stator 2 and center roller 3 with radial direction
Gap.
External stator 1 is made up of external stator tooth, external stator groove, external stator yoke, and external stator slot number is Ns, external stator tooth is circumferentially
Direction is uniformly distributed, and threephase armature winding 1-1 is wound with outer stator tooth, and armature winding 1-1 is centralized three-phase windings.
Such as Fig. 1, threephase armature winding 1-1 is wound with 6 external stator teeth.
Referring to Fig. 2, interior subregion stator 2 is inside and outside two layers of radially layered structure, is brought into close contact together for inside and outside two layers.Outside
Layer is made up of internal stator iron core 2-4 and multiple rare-earth Nd-Fe-B permanent magnet 2-1；Internal layer is by can be in multiple aluminium nickel cobalts of micro USB degaussing
Permanent magnet 2-2 and impulse magnetization winding 2-3 compositions.Nd-Fe-B permanent magnet 2-1 quantity is P, P Nd-Fe-B permanent magnet 2-
1 is along the circumferential direction uniformly embedded into internal stator iron core 2-4, and Nd-Fe-B permanent magnet 2-1 center and the external stator tooth of external stator 1
Center alignment, both it is same diametrically.Nd-Fe-B permanent magnet 2-1 inside and outside footpath is respectively equal to internal stator iron core 2-4's
Inside and outside footpath.P Nd-Fe-B permanent magnet 2-1 is cutting orientation magnetizing, two two Nd-Fe-B permanent magnet 2-1 of neighbour magnetizing direction phase
Instead.
Al-Ni-Co permanent magnet 2-2 quantity is Q, and Q Al-Ni-Co permanent magnet 2-2 is evenly distributed in the circumferential direction, aluminium nickel
Cobalt permanent magnet 2-2 is radial magnetizing, Al-Ni-Co permanent magnet 2-2 center and the center alignment of the external stator groove of external stator 1, two
Person it is same diametrically.Wherein, P=Q=Ns.There is default pilot trench between two neighboring Al-Ni-Co permanent magnet 2-2, default pilot trench
The external stator tooth center alignment of center and external stator 1, it is same diametrically.Impulse magnetization winding 2-3 is placed in each inner stator
In groove, and it is wound on Al-Ni-Co permanent magnet 2-2, impulse magnetization winding 2-3 is concentratred winding, and head and the tail series connection successively forms single-phase arteries and veins
Winding is rushed, pulse winding applies short-time pulse electric current, and pulse current direction forms and is alternately distributed, to change Al-Ni-Co permanent magnet
The 2-2 level of magnetization even direction of magnetization carrys out the air-gap field of regulation motor.
Al-Ni-Co permanent magnet 2-2 is made up of alnico permanent magnetic material, and alnico permanent magnetic material has the low spy of coercivity
Point, using cast moulding manufacturing process, temperature stability is high, and can be filled by short-time pulse electric current, degaussing, and " memory " to live its magnetic close
Level, realize the close flexible modulation of motor gas-gap magnetic.
A magnetic conduction bridge 2-5 is fixed on all Al-Ni-Co permanent magnet 2-2 inner ring.External stator iron core has a boss
2-4-1, boss 2-4-1 are stretched out in interior stator slot, are easy to fix Al-Ni-Co permanent magnet 2-2, are made the inside and outside of interior subregion stator 2
It is fixed together to form an entirety for two layers, Al-Ni-Co permanent magnet 2-2 outer surface and internal stator iron core 2-4 inner surface are close
Fitting.
Referring to Fig. 3, center roller 3 is by polylith magnetic inductive block 3-1 and non-magnetic piece of circumferentially spaced combination of 3-2 of polylith
Form, magnetic inductive block 3-1 and non-magnetic piece of 3-2 side are brought into close contact.Wherein magnetic inductive block 3-1 number NrAs center roller 3
Number of pole-pairs, and meet Nr=kNs± 1, (k=1,2,3 ...).Center roller 3 in Fig. 3 is by 5 pieces of magnetic inductive block 3-1 and 5 pieces
Non-magnetic piece of 3-2 is formed.
Referring to Fig. 4, the operation of motor of the present invention follows magnetic flux switching principle, by external stator 1, center roller 3 and interior point
Cascaded structure is presented in area's stator 2 on magnetic circuit, is collectively forming the main magnetic circuit of motor.Moved in center roller 3 in the position shown in Fig. 4
When putting, magnetic flux caused by permanent magnet enters external stator tooth, and for open circuit threephase armature winding 1-1, its both ends can induce
Certain counter electromotive force；And when center roller 3 moves to Fig. 5 position, permanent magnet flux quantitatively keeps constant but walked
Direction it is just the opposite for winding, to pass external stator tooth, it is clear that the counter electromotive force that now senses in winding and upper one kind
Situation is compared, and numerical value is identical but opposite polarity.This principle is based on, linkage is forever after center roller 3 rotates, in winding
Magnetic magnetic flux constantly will change between positive and negative maximum, correspond, and winding both ends can produce amplitude and phase alternation
Back-emf.Referring to Fig. 5 and Fig. 6, using magnetic circuit principle, research Al-Ni-Co permanent magnet 2-2 fills influence of the degaussing to motor-field,
Fig. 5) show can fill degaussing Al-Ni-Co permanent magnet 2-2 it is identical with flow direction caused by rare-earth Nd-Fe-B permanent magnet 2-1 when
Magnetic flux path figure, now the path order of magnetic loop is caused by Al-Ni-Co permanent magnet 2-2：First Al-Ni-Co permanent magnet
It is 2-2, magnetic conduction bridge 2-5, second Al-Ni-Co permanent magnet 2-2, internal stator iron core 2-4, interior air gap, magnetic inductive block 3-1, outer air gap, outer
Stator 1, outer air gap, magnetic inductive block 3-1, interior air gap, internal stator iron core 2-4, first Al-Ni-Co permanent magnet 2-2.Nd-Fe-B permanent magnetic
The path order of magnetic loop caused by body 2-1 is Nd-Fe-B permanent magnet 2-1, internal stator iron core 2-4, interior air gap, magnetic inductive block 3-
1st, outer air gap, external stator 1, outer air gap, magnetic inductive block 3-1, interior air gap, internal stator iron core 2-4, Nd-Fe-B permanent magnet 2-1.By changing
Become the size of magnetic field impulse electric current, flexibly changing can fill the Al-Ni-Co permanent magnet 2-2 of degaussing level of magnetization, you can change mixing
The power of permanent magnetic field, so as to carry out increasing magnetic liter square or weak magnetic speedup to motor.Magnetic flux path shown in Fig. 6 is Al-Ni-Co permanent magnet
When body 2-2 is opposite with Nd-Fe-B permanent magnet 2-1 flow direction, i.e. Al-Ni-Co permanent magnet 2-2 limit degaussing is to reversely magnetizing, neodymium
Iron boron permanent magnet 2-1 will be largely short-circuit by Al-Ni-Co permanent magnet 2-2, and the path order of the short-circuit magnetic loop is：First aluminium nickel
It is cobalt permanent magnet 2-2, magnetic conduction bridge 2-5, second Al-Ni-Co permanent magnet 2-2, internal stator iron core 2-4, Nd-Fe-B permanent magnet 2-1, interior
Stator core 2-4, first Al-Ni-Co permanent magnet 2-2, this causes air-gap field magnetic flux density further to reduce, and expands so as to realize
The purpose of wide electric machine speed regulation scope.
Referring to Fig. 7, filled in the neodymium iron boron of Al-Ni-Co permanent magnet 2-2 aluminium nickel cobalt magnetizing direction and Nd-Fe-B permanent magnet 2-1
When magnetic direction is consistent, i.e., the unloaded equivalent magnetic circuit under the motor normal operation, for as far as possible eliminate Nd-Fe-B permanent magnetic with
Cross-couplings phenomenon between Al-Ni-Co permanent magnet, the equivalent magnetomotive force of two kinds of permanent magnets should be roughly equal, i.e.,：
Wherein, FCanc、FCnfbThe respectively calculating magnetomotive force of aluminium nickel cobalt and Nd-Fe-B permanent magnet, Λanc、ΛnfbRespectively aluminium
The interior magnetic conductance of nickel cobalt and Nd-Fe-B permanent magnet, Φanc、ΦnfbEvery pole magnetic flux that respectively aluminium nickel cobalt and Nd-Fe-B permanent magnet provide.
Then, in design, Al-Ni-Co permanent magnet direction of magnetization length lancWith Nd-Fe-B permanent magnet direction of magnetization length lnfbIt need to meet about
Beam formula：
Wherein, HCanc、HCnfbThe respectively coercivity of aluminium nickel cobalt and Nd-Fe-B permanent magnet, kanc、knfbRespectively aluminium nickel cobalt and
The reply line slope of Nd-Fe-B permanent magnet, definition mix permanent magnet weak magnetic COEFFICIENT K：
Wherein, kanc、knfbThe respectively sectional area for every pole magnetic flux that aluminium nickel cobalt and Nd-Fe-B permanent magnet provide.
From formula (2) and (3), the magnetic flux size and size and weak magnetic coefficient that are provided to external magnetic circuit when known neodymium iron boron
When, you can substantially extrapolate the size of aluminium nickel cobalt.
Referring to Fig. 8, using Finite Element Simulation Analysis, can obtain it is unloaded in the case of aluminium nickel cobalt be completely reversed magnetization and fully forward
Armature winding counter potential waveform figure during magnetization, its back-emf virtual value rise to 65.8V by 6.2V, and amplitude of variation is up to
1000%, it is known that motor of the present invention due to use can in the Al-Ni-Co permanent magnet of micro USB degaussing, the principle based on memory electrical machine,
So that the weak magnetic ability of the motor is stronger, adjustable magnetic scope is wider.
Claims (6)
1. a kind of hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switches memory electrical machine, including external stator (1), interior subregion are determined
Sub (2) and center roller (3), external stator (1) are made up of external stator tooth, external stator groove and external stator yoke, and external stator tooth is circumferentially
Direction is uniformly distributed and threephase armature winding (1-1) is wound with outer stator tooth, it is characterized in that：The interior subregion stator (2) is
Inside and outside double-layer structure together is brought into close contact, outer layer is made up of internal stator iron core (2-4) and Nd-Fe-B permanent magnet (2-1), neodymium
Iron boron permanent magnet (2-1) is along the circumferential direction uniformly embedded into internal stator iron core (2-4), the center of Nd-Fe-B permanent magnet (2-1) with
The external stator tooth center alignment of external stator (1), Nd-Fe-B permanent magnet (2-1) cutting orientation magnetizing, two two Nd-Fe-B permanent magnet (2- of neighbour
1) magnetizing direction is opposite；Internal layer is by impulse magnetization winding (2-3) and can be in Al-Ni-Co permanent magnet (2-2) group of micro USB degaussing
Into Al-Ni-Co permanent magnet (2-2) is evenly distributed in the circumferential direction, center and the center alignment of external stator groove, two neighboring aluminium nickel
There are default pilot trench, the center of default pilot trench and the external stator tooth center alignment of external stator (1) between cobalt permanent magnet (2-2), successively
The impulse magnetization winding (2-3) of head and the tail series connection is placed in each default pilot trench and is wound on Al-Ni-Co permanent magnet (2-2).
2. hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switching memory electrical machine according to claim 1, it is characterized in that：
Center roller (3) is made up of multiple magnetic inductive blocks (3-1) with non-magnetic piece of (3-2) circumferentially spaced combine, magnetic inductive block (3-1)
Number NrFor the number of pole-pairs of center roller (3), and Nr=kNs± 1, NsIt is external stator slot number, k=1,2,3 ....
3. hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switching memory electrical machine according to claim 1, it is characterized in that：
The quantity of Nd-Fe-B permanent magnet (2-1) is P, and the quantity of Al-Ni-Co permanent magnet (2-2) is Q, P=Q=Ns, NsIt is external stator slot number.
4. hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switching memory electrical machine according to claim 1, it is characterized in that：
The sense of current of impulse magnetization winding (2-3) is alternately distributed.
5. hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switching memory electrical machine according to claim 1, it is characterized in that：
A magnetic conduction bridge (2-5) is fixed with the inner ring of all Al-Ni-Co permanent magnets (2-2).
6. hybrid excitation type stator partition type hybrid permanent magnet magnetic flux switching memory electrical machine according to claim 1, it is characterized in that：
External stator iron core has a boss, and the boss is stretched out in interior stator slot to fix Al-Ni-Co permanent magnet (2-2).
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| CN117318421A (en) * | 2023-09-07 | 2023-12-29 | 淮阴工学院 | Unequal tooth hybrid excitation motor structure based on stator partition structure |
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