CN105703583A - Multi-stator hybrid magnetic circuit permanent magnet synchronous motor and method - Google Patents

Multi-stator hybrid magnetic circuit permanent magnet synchronous motor and method Download PDF

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Publication number
CN105703583A
CN105703583A CN201610247112.6A CN201610247112A CN105703583A CN 105703583 A CN105703583 A CN 105703583A CN 201610247112 A CN201610247112 A CN 201610247112A CN 105703583 A CN105703583 A CN 105703583A
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axial
stator
motor
radial
rotor
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CN105703583B (en
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王道涵
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Shandong University
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Shandong University
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • H02K16/04Machines with one rotor and two stators
    • 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
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • H02K1/272Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility

Abstract

The invention discloses a multi-stator hybrid magnetic circuit permanent magnet synchronous motor and method. The multi-stator hybrid magnetic circuit permanent magnet synchronous motor comprises a radial stator, an axial stator and a rotor, wherein the rotor is sheathed in the radial stator and is coaxially arranged with the radial stator, the axial stator is arranged at one or both ends of the rotor, and the axial stator and the rotor are concentrically arranged; a radial winding is arranged in a stator groove of the radial stator, and an axial winding is arranged in the stator groove of the axial stator; a rotor groove is formed on the rotor, a permanent magnet is placed in the rotor groove, the permanent magnet generates a radial magnetic pole and an axial magnetic pole on the rotor, the radial magnetic pole faces to the radial stator of the motor, and the axial magnetic pole faces to the axial stator of the motor, so torques are formed in the radial and axial directions of the motor to form a hybrid magnetic circuit. According to the multi-stator hybrid magnetic circuit permanent magnet synchronous motor disclosed by the invention, the radial magnetic flux and the axial magnetic flux generated by the permanent magnet of the motor are utilized, a magnetic flux leakage effect at end parts is eliminated, the material utilization rate of the motor is improved, and the weight of the motor is reduced.

Description

A kind of multiple stators mixed magnetic circuit permagnetic synchronous motor and method
Technical field
The present invention relates to a kind of multiple stators mixed magnetic circuit permagnetic synchronous motor and method。
Background technology
In recent years, along with the reduction of the raising of permanent magnet material resistance to elevated temperatures and price, magneto is more widely applied in national defence, industrial and agricultural production and daily life etc., and forward high-power, high performance and microminiaturized direction are developed。The power of current magneto from several milliwatts to several megawatts, the large-scale magneto that range of application is drawn from toy motor, commercial Application to naval vessel, be widely applied in national economy, daily life, war industry, aerospace various aspects。
But existing permagnetic synchronous motor has a disadvantage in that
1, permagnetic synchronous motor is fixed due to permanent magnet magnetic kinetic potential, and motor main flux is non-adjustable, causes output-constant operation narrow range, and speed adjustable range is wide in range not。
2, in existing internal permanent magnet synchronous motor rotor structure, rotor permanent magnet realizes " poly-magnetic effect " by various combinations, therefore rotor core magnetic poles is close significantly high, its end is made to there is bigger leakage magnetic flux, leakage-flux of rotor is closed by end or the end cap of rotor, the total magnetic flux produced due to permanent magnet is certain, the existence that brow leakage is logical not only makes two end magnetic field skewness of motor, and reduce the useful flux utilization rate of motor, thus reducing power density and the torque density of motor, for overcoming the impact that brow leakage is logical, during actual design, rotor is through frequently with overhang structure, make rotor core axial length more than motor stator core axial length, but this structure significantly increases the axial length of motor, and then add core material consumption and the manufacturing cost of motor, and this structural nature does not play the effect suppressing brow leakage logical。
3, when existing permagnetic synchronous motor is properly functioning, generally only has iqElectric current produces torque, now id=0, during weak magnetic field operation, it is necessary to rotor is applied d shaft current, now id≠ 0, and then realize the demagnetizing effect to rotor magnetic pole, owing to d shaft current is produced by the power inverter of motor, therefore when motor carries out weak magnetic control, the amplitude of machine winding current can be enlarged markedly, and it is greatly increased the capacity of power inverter, when needs carry out the weak magnetic of the degree of depth, the d shaft current now needed is very big, the merit angle of motor will reduce rapidly, current of electric will quickly exceed the capacity of converter, therefore, to needing to carry out the permagnetic synchronous motor of weak magnetism speed expansion operation, typically require and take extra measure and method to carry out weak magnetically condition, every pole magnetic flux is weakened with this。
4, during according to weak magnetic, the path of d axle magnetic flux process is different, the permagnetic synchronous motor of existing built-in rotor structure can be divided into two classes, one type, when carrying out weak magnetic control, the d axle magnetic flux that armature winding produces can pass the permanent magnet of motor, cause permanent magnet irreversible demagnetization, an other class, when carrying out weak magnetic control, the d axle magnetic flux that armature winding produces closes without permanent magnet, but the more rotor flux end by motor and end cap Guan Bi are forced in the magnetic field that d shaft current produces, significantly increase the leakage magnetic flux of motor, and owing to motor end magnetic resistance is generally much bigger than air-gap reluctance, therefore, d shaft current required for weak magnetic is bigger, significantly increase cost and the winding copper loss of power of motor inverter。
5, existing permagnetic synchronous motor usual armature counter electromotive force harmonic wave is bigger, cogging torque outstanding problem, bring serious vibration and noise problem, the method of skewed stator slot or skewed-rotor that is typically with at present is to improve counter electromotive force harmonic wave and to weaken cogging torque, but skewed stator slot and skewed-rotor processing technique are more complicated, considerably increase manufacturing cost, and can to a certain degree reduce the average electromagnetic torque of motor, reduce torque density and the power density of motor。
In this case, seeking a kind of brow leakage little, magnetic flux utilization rate is high, and sine degree is good, and eddy-current loss is little, adjustable magnetic flexible function but the little AC permanent magnet synchronous motor of power inverter capacity is most important。
Summary of the invention
The present invention is to solve the problems referred to above, propose a kind of multiple stators mixed magnetic circuit permagnetic synchronous motor and method, the present invention adopts the frame mode of axial stator and radial stator, radial flux that permanent magnet produces and axial magnetic flux is made all to obtain utilization, eliminate brow leakage effect, improve motor material and utilize utilization rate, alleviate the weight of motor, improve power density, and can realize increasing magnetic neatly and run and weak magnetism speed expansion operation, widen the economical operation scope of motor, the performance improving driving motor for electric automobile is significant。
To achieve these goals, the present invention adopts the following technical scheme that
A kind of multiple stators mixed magnetic circuit permagnetic synchronous motor, including radial stator, axial stator and rotor, wherein, it is placed with permanent magnet in described rotor, described permanent magnet makes generation magnetic flux on rotor, a part of magnetic flux enters in the middle of radial stator along the radial direction of motor by radial air gap, form radially main flux, another part magnetic flux in axial direction enters in the middle of axial stator by axial air-gap, form axial main flux, radially main flux and axial main flux composition mixed magnetic circuit, by regulating and controlling mixed magnetic circuit, motor is made to realize in the conversion increased between magnetic running status and weak magnetism speed expansion running status。
Further, a kind of multiple stators mixed magnetic circuit permagnetic synchronous motor, including radial stator, axial stator and rotor, wherein, described rotor is set in inside radial stator, coaxially lays with radial stator, the one or both ends of described rotor are provided with axial stator, and axial stator is concentric with rotor to be laid;
It is provided with radially winding in the stator slot of described radial stator, in the stator slot of described axial stator, is provided with axial winding;
Described rotor is provided with rotor slot, permanent magnet it is placed with in rotor slot, described permanent magnet makes to produce on rotor magnet radial poles and axial pole, described magnet radial poles is towards motor radial stator, described axial pole is towards motor axial stator so that motor radially, axially all produces torque, forms mixed magnetic circuit, by regulating and controlling mixed magnetic circuit, motor is made to realize in the conversion increased between magnetic running status and weak magnetism speed expansion running status。
Described radial stator, including stator slot, stator tooth and stator yoke, wherein, stator yoke is circular, and stator tooth has multiple, is distributed along stator yoke even circumferential, has stator slot between stator tooth, is placed with radially winding in described stator slot。
Described axial stator includes axial stator back yoke, axial stator groove and axial stator tooth, described axial stator back yoke is positioned at the axial side of axial stator, axial stator tooth is arranged in axial stator back yoke, it is provided with axial stator groove between axial stator tooth, in axial stator groove, lays axial winding。
There is radial air gap between described radial stator and rotor outer, between described axial stator and rotor tip, there is axial air-gap。
The magnetic flux that described permanent magnet produces, a part enters in the middle of radial stator along motor radial through radial air gap, form radially main flux, another part extends axially through axial air-gap and enters in the middle of axial stator, form axial main flux, radially main flux and the magnetic field interaction that radially armature winding produces produce torque, and the magnetic field interaction that axial main flux and axial armature winding produce produces torque。
The radial direction main flux of described motor and axial main flux are parallel relationship。
The total magnetic flux produced due to permanent magnet is certain, owing to radial direction main flux and the axial main flux of motor are parallel relationship, when radial direction armature winding applies d axle demagnetizing current, the radial direction main flux of motor reduces, axial main flux increases, on the contrary, when the axial armature winding of motor applies d axle demagnetizing current, the axial main flux of motor reduces, and radially main flux increases。
When motor normal operation does not need weak magnetic, the axial armature winding of motor applies d axle demagnetizing current, now radially main flux is maximum for motor, radially magnetic is close also maximum for motor, motor output rated maximum torque and power, when motor needs to carry out weak magnetism speed expansion, reduce the d axle demagnetizing current of axial armature winding, now motor radially main flux reduces, radially magnetic is close decreases, motor realizes weak magnetic field operation, motor speed improves, now axial armature winding can apply q shaft current, motor is produced power torque, improve torque output capability during motor weak magnetic field operation, improve power density and the torque density of motor further。
Preferably, described radial stator is formed by silicon steel plate stacking, and described axial stator is folded by silicon-steel sheet coiled and processes。
Preferably, described number of motor phases m >=3, number of pole-pairs p >=1, radially armature winding and axial armature winding are Single-layer Windings or Double Layer Winding, the magnetic field number of poles that radially armature winding produces is equal with magnet radial poles number of poles, and the number of poles in the magnetic field that axial armature winding produces is equal with axial pole number of poles。
Preferably, described rotor is that soft-magnetic composite material is made, and rotor is provided with the groove laying permanent magnet, and described rotor tip is processed into fan ring-shaped, forms axial pole, and the number of poles of axial pole and the number of poles of magnet radial poles are equal。
Described permanent magnet arranges in the rotor according to the rule that like pole is relative, it is achieved poly-magnetic effect, forms magnetic pole。
Preferably, described permanent magnet is that high performance permanent magnetic materials is made, as neodymium ferrum, Rare-Earth Cobalt etc., or low magnetic energy product permanent magnet material are made, such as ferrite etc.。
Magnetic flux based on above-mentioned motor regulates and controls method, including: the rated speed according to motor work, nominal torque and performance requirement, the number of turn of the radial air gap length of motor, axial air-gap length and radial direction armature winding and axial armature winding is set, determine that motor radial stator and acting as of axial stator produce main driving torque or realize weak magnetic, to determine the duty of motor。
Further, the duty of described motor specifically includes three kinds:
(1) axial armature winding applies d shaft current, and radial stator produces main driving torque, and axial stator realizes weak magnetic function and produces power torque;
(2) radially armature winding applies d shaft current, and axial stator produces main driving torque, and radial stator realizes weak magnetic function and produces power torque;
(3) the radial direction armature winding of motor and axial armature winding all do not apply d shaft current, all only produce q shaft current, radially main flux and radial stator armature field produce driving torque, axial main flux and axial stator armature field produce driving torque, and motor torque density and power density reach maximum。
Three kinds of duties under concrete introduction:
(1) radial stator produces main driving torque, and axial stator realizes weak magnetic function and produces power torque
When radial direction armature winding and the equal no power of axial armature winding, on described rotor, a part for the magnetic flux that permanent magnet produces enters radial stator in radial direction through radial air gap and forms radially main flux, another part passes axially through axial air-gap entrance axial stator and forms axial main flux, radially main flux determines that the radial air gap magnetic of motor is close, axial main flux determines that the axial air-gap magnetic of motor is close, owing to two parts magnetic flux is in parallel, empty load of motor radially main flux and axial main flux accounting are determined by the length of radial air gap and axial air-gap, compared with axial air-gap, radial air gap is more big, radially the accounting of main flux is more low, otherwise it is then more high。When motor normal operation does not need weak magnetic field operation, the armature winding of axial stator produces d shaft current, the axial main flux of motor is reduced, radially main flux increases, motor torque is mainly by radial direction main flux and radially armature winding magnetic field generation, now the axial armature winding of motor only applies d shaft current, radially main flux is maximum, the size of radially main flux can be regulated by regulating the d shaft current of the axial armature winding of motor, when motor needs to carry out weak magnetic field operation, the d shaft current of axial armature winding reduces, motor radially main flux reduces, axial main flux increases, now the radial component of motor is operated in weak magnetic stripe part, while reducing the d shaft current of axial armature winding, its q shaft current can be increased simultaneously, now axial stator armature winding produces power torque with axial main flux, increase torque density and the power density of motor。
(2) axial stator produces main driving torque, and radial stator realizes weak magnetic function and produces power torque
When radial direction armature winding and the equal no power of axial armature winding, on described rotor, a part for the magnetic flux that permanent magnet produces enters radial stator in radial direction through radial air gap and forms radially main flux, another part passes axially through axial air-gap entrance axial stator and forms axial main flux, radially main flux determines that the radial air gap magnetic of motor is close, axial main flux determines that the axial air-gap magnetic of motor is close, owing to two parts magnetic flux is in parallel, empty load of motor radially main flux and axial main flux accounting are determined by the length of radial air gap and axial air-gap, compared with axial air-gap, radial air gap is more big, radially the accounting of main flux is more low, otherwise it is then more high。When motor normal operation does not need weak magnetic field operation, the armature winding of radial stator produces d shaft current, motor radially main flux is reduced, axial main flux increases, motor torque is mainly produced by axial main flux and axial armature winding magnetic field, now motor radially armature winding only applies d shaft current, axial main flux is maximum, the size of axial main flux can be regulated by regulating the d shaft current of motor radially armature winding, when motor needs to carry out weak magnetic field operation, radially the d shaft current of armature winding reduces, the axial main flux of motor reduces, radially main flux increases, now the axial component of motor is operated in weak magnetic stripe part, while reducing the d shaft current of radially armature winding, its q shaft current can be increased simultaneously, now radial stator armature winding produces power torque with radially main flux, increase torque density and the power density of motor。
(3) radial stator and axial stator all produce driving torque
This is the third working condition of motor, now the radial direction armature winding of motor and axial armature winding all do not produce d shaft current, all only produce q shaft current, in this case, radially main flux and radial stator armature field produce driving torque, axial main flux and axial stator armature field produce driving torque, and namely radial stator and axial stator all produce driving torque, and now motor torque density and power density reach maximum。
A kind of electric automobile, applies above-mentioned multiple stators mixed magnetic circuit permagnetic synchronous motor。
The invention have the benefit that
(1) motor of the present invention is double-stator structure, and this double-stator structure is different from existing most double-stator structures, in existing Double-stator motor, one of them stator is placed in inside rotor, for inner stator, one in rotor exterior, for external stator, the motor feels hot, and to concentrate on motor axial, motor heat load is significantly high, and inner stator is not directly connected with external environment condition, and motor radiating is comparatively difficult。Two stator respectively radial stators of motor of the present invention and axial stator, two stators of this double-stator structure are respectively placed at the radial and axial direction of motor, radial stator is identical with the stator of common permagnetic synchronous motor, radial stator is coaxially placed in outside p-m rotor, the magnetic flux part that rotor permanent magnet produces enters into radial stator in radial direction through air gap and forms radially main flux, radial stator is laid radially winding, axial stator is placed in the end of motor, axial stator is coaxially relative with p-m rotor, the magnetic flux that rotor permanent magnet produces enters axially in the middle of axial stator iron core, axial stator is laid axial winding, two stator casings are all at outside motor, directly contact with external environment, and the end that can make full use of motor dispels the heat;
(2) motor of the present invention is built-in rotor structure, there is internal permanent magnet synchronous motor structural compactness good, the close height of the effective magnetic of air gap, it is prone to high speed rotating and torque density advantages of higher, the rotor of the bright motor of this law is soft magnetism composite rotors, journal axle is all significantly high to permeability, during operation, iron loss is low, rotor magnetic pole of the present invention is divided into radial and axial two parts, magnet radial poles part is similar with the rotor magnetic pole of common internal permanent magnet synchronous motor, axial pole part obtains by the axial end portion of soft magnetism composite rotors is processed into the annular salient pole iron core of fan, axial pole coordinates generation torque with motor axial stator, magnet radial poles coordinates generation torque with motor radial stator, motor rotor construction is simple, it is prone to machining, low cost of manufacture;
(3) motor of the present invention is mixed magnetic circuit permagnetic synchronous motor, the magnetic flux part that permanent magnet produces radially arrives radial stator through radial air gap along motor becomes radially main flux, another part magnetic flux passes axially through the axial stator of axial air-gap arrival motor end becomes axial main flux, in motor of the present invention, the radial flux of p-m rotor and end magnetic flux are obtained for sufficient utilization, motor does not have brow leakage to lead to, improve magnetic flux utilization rate, effectively improve end-region magnetic field of electrical machine distribution, improve power density and the torque density of motor;
(4) motor of the present invention can realize increasing magnetic operation and weak magnetism speed expansion operation neatly, when motor is properly functioning, axial stator winding produces d axle and q shaft current simultaneously, the magnetic field that d shaft current produces makes most magnetic fluxs that rotor produces radially into radial core, the magnetic field interaction produced with radial stator winding produces main torque, additionally the magnetic flux of fraction enters axially in axial stator, the q shaft current of this part magnetic flux and axial stator winding interacts and produces power torque, namely when motor is properly functioning, axial stator winding plays increase motor radially main flux and produces power torque;When needs weak magnetism speed expansion runs, reduce the d shaft current of the axial stator winding of motor, this makes considerable rotor flux enter axially in axial iron core, significantly reduce the radial direction main flux of motor, radial stator is made to be operated under weak magnetic stripe part, enlarge markedly the speed adjustable range of motor, it is achieved weak magnetism speed expansion;
(5) number of turn of motor radial stator winding of the present invention and the axial stator winding number of poles according to real electrical machinery, permanent magnet residual magnetism density, permanent magnet lays compound mode and motor speed range of operation appropriate design selects, purpose is so that the axial stationary part of motor can either effectively change the radial direction main flux of motor, thus possessing enough weak magnetic energy power, when not needing weak magnetic, enough power torques can be produced again, enlarge markedly power density and the torque density of motor;
(6) motor of the present invention can separately design the geomery of motor magnet radial poles and end fan ring magnetic pole and the number of turn of armature winding, by both reasonable combination superpositions, offset the harmonic wave and cogging torque that weaken counter electromotive force, improve and optimize the back emf waveform of motor with this, and weaken the cogging torque of motor, overcome existing permagnetic synchronous motor and skewed slot must be adopted to suppress harmonic wave the shortcoming weakening cogging torque。
Accompanying drawing explanation
Fig. 1 (a) is motor embodiment one structural representation of the present invention;
Radial motor stator core that Fig. 1 (b) is motor embodiment one of the present invention and rotor schematic diagram;
The soft magnetism composite rotors right view that Fig. 1 (c) is motor embodiment one of the present invention;
Fig. 1 (d) is the axial stator schematic diagram of motor embodiment one of the present invention;
Fig. 1 (e) is the integrated motor right view of motor embodiment one of the present invention;
Fig. 2 (a) is motor embodiment two structural representation of the present invention;
Radial motor stator core that Fig. 2 (b) is motor embodiment two of the present invention and rotor schematic diagram;
The soft magnetism composite rotors right view that Fig. 2 (c) is motor embodiment two of the present invention;
Fig. 2 (d) is the axial stator schematic diagram of motor embodiment two of the present invention;
Fig. 2 (e) is the integrated motor right view of motor embodiment two of the present invention;
Wherein, 1. radial stator tooth, 2. radial stator yoke, 3. radial stator groove, 4. radial direction armature winding, 5. radial air gap, 6. axial stator tooth, 7. axial stator yoke, 8. axial stator groove, 9. axial armature winding, 10. axial air-gap, 11. soft magnetism composite rotors, 12. rotor slot, 13. permanent magnet, 14. magnet radial poles, 15. axial poles。
Detailed description of the invention:
Below in conjunction with accompanying drawing, the invention will be further described with embodiment。
A kind of multiple stators mixed magnetic circuit permagnetic synchronous motor, including radial stator, axial stator and rotor, described rotor is placed in inside radial stator, with radial stator coaxial placement, radial air gap is had between described rotor and radial stator, described axial stator is placed in rotor tip, concentric with rotor place, axial air-gap is had between described rotor and axial stator, described radial stator is formed by silicon steel plate stacking, described radial stator includes stator slot, stator tooth and stator yoke, radially winding is laid in described stator slot, described axial stator is folded by silicon-steel sheet coiled and processes, axial stator includes axial stator back yoke, stator slot and stator tooth, axial winding is laid in stator slot, described rotor is made up of soft-magnetic composite material, described rotor there is rotor slot, permanent magnet is laid in rotor slot, described permanent magnet realizes " poly-magnetic effect " by reasonably laying combination, rotor produces magnetic pole, described magnetic pole is divided into magnet radial poles and axial pole, described magnet radial poles is towards motor radial stator, it it is radial air gap between magnet radial poles and rotor, described axial pole is processed into the shape of fan ring, towards motor axial stator, it it is axial air-gap between described axial pole and axial stator。
Further, the magnetic flux that motor permanent magnet produces, a part enters in the middle of radial stator along motor radial through radial air gap, form radially main flux, another part extends axially through axial air-gap and enters in the middle of axial stator, form axial main flux, radially main flux produces torque with the magnetic field interaction that radially armature winding produces, the magnetic field interaction that axial main flux and axial armature winding produce produces torque, motor is absent from brow leakage field, magnetic flux utilization rate is high, and power density and torque density are high。
Further, the total magnetic flux produced due to permanent magnet is certain, owing to radial direction main flux and the axial main flux of motor are parallel relationship, when radial direction armature winding applies d axle demagnetizing current, the radial direction main flux of motor reduces, and axial main flux increases, on the contrary, when the axial armature winding of motor applies d axle demagnetizing current, the axial main flux of motor reduces, and radially main flux increases。When motor normal operation does not need weak magnetic, the axial armature winding of motor applies d axle demagnetizing current, now radially main flux is maximum for motor, radially magnetic is close also maximum for motor, the exportable rated maximum torque of motor and power, when motor needs to carry out weak magnetism speed expansion, reduce the d axle demagnetizing current of axial armature winding, now motor radially main flux reduces, radially magnetic is close decreases, motor realizes weak magnetic field operation, motor speed improves, now axial armature winding can apply q shaft current, motor is produced power torque, improve torque output capability during motor weak magnetic field operation, improve power density and the torque density of motor further。
Further, described number of motor phases m >=3, number of pole-pairs p >=1, radially armature winding and axial armature winding can be Single-layer Windings, it is also possible to for Double Layer Winding, radially the number of poles in the magnetic field that armature winding and axial armature winding produce is all equal with rotor magnetic pole number of poles。
Further, described rotor is that soft-magnetic composite material is made, and rotor is provided with the groove laying permanent magnet, and described soft magnetism composite rotors end is processed into fan ring-shaped and is formed axial pole, and the number of poles of axial pole and the number of poles of magnet radial poles are equal。
Further, described permanent magnet is that high performance permanent magnetic materials is made, as neodymium ferrum, Rare-Earth Cobalt etc., or low magnetic energy product permanent magnet material are made, such as ferrite etc.。
Further, described permanent magnet, according to the relative rule of like pole, arranges in the rotor according to certain combination, it is achieved poly-magnetic effect, forms magnetic pole。
Further, there is radial air gap between described radial stator and soft magnetism composite rotors cylindrical, between described axial stator and soft magnetism composite rotors end fan ring, there is axial air-gap。
During motor practical application, rated speed according to motor work, nominal torque and specific performance requirement, by the parameters of appropriate design motor such as radial air gap length, the number of turn of axial air-gap length and radially armature winding and axial armature winding, determines that motor radial stator and axial stator are to produce main driving torque or realize weak magnetic function。
Motor of the present invention is built-in rotor structure, there is internal permanent magnet synchronous motor structural compactness good, the close height of the effective magnetic of air gap, it is prone to high speed rotating and torque density advantages of higher, the rotor of the bright motor of this law is soft magnetism composite rotors, motor is at the radial and axial higher magnetic permcability that is respectively provided with, and during operation, core loss is little, and efficiency is high。Rotor magnetic pole of the present invention is divided into radial and axial two parts, magnet radial poles part is similar with the rotor magnetic pole of common internal permanent magnet synchronous motor, axial pole part obtains by the axial component of soft magnetism composite rotors is processed into the annular salient pole iron core of fan, axial pole coordinates generation torque with motor axial stator, and magnet radial poles coordinates generation torque with motor radial stator。
Motor of the present invention is double-stator structure, this double-stator structure is different from existing most double-stator structures, in existing Double-stator motor, one of them stator is placed in inside rotor, for inner stator, one in rotor exterior, for external stator, the motor feels hot, and to concentrate on motor axial, motor heat load is significantly high, and inner stator is not directly connected with external environment condition, and motor radiating is comparatively difficult。Two stator respectively radial stators of motor of the present invention and axial stator, two stators of this double-stator structure are respectively placed at the radial and axial direction of motor, radial stator is identical with the stator of common permagnetic synchronous motor, radial stator is coaxially placed in outside p-m rotor, the magnetic flux part that rotor permanent magnet produces enters into radial stator in radial direction through air gap and forms radially main flux, radial stator is laid radially winding, axial stator is placed in the end of motor, axial stator is coaxially relative with p-m rotor, the magnetic flux that rotor permanent magnet produces enters axially in the middle of axial stator iron core, axial stator is laid axial winding, two stator casings are all at outside motor, directly contact with external environment, and the end that can make full use of motor dispels the heat。
Motor of the present invention is mixed magnetic circuit permagnetic synchronous motor, the magnetic flux part that permanent magnet produces radially arrives radial stator through motor, flux circuit is formed through stator core, become radially main flux, another part magnetic flux arrives the axial stator of motor end vertically, axial stator iron core through end forms flux circuit, in motor of the present invention, the radial flux of p-m rotor and end magnetic flux are obtained for sufficient utilization, improve magnetic flux utilization rate, motor does not have brow leakage to lead to, effectively improve end-region magnetic field of electrical machine distribution, improve power density and the torque density of motor。
Motor of the present invention can carry out weak magnetism speed expansion operation。When motor is properly functioning, axial stator winding produces d axle and q shaft current simultaneously, the magnetic field that d shaft current produces makes most magnetic fluxs that rotor produces radially into radial core, the magnetic field interaction produced with radial stator winding produces main torque, additionally sub-fraction magnetic flux enters axially in axial stator, the q shaft current of this part magnetic flux and axial stator winding interacts and produces power torque, namely, when motor is properly functioning, axial stator winding plays increase motor radially main flux and produces power torque;When needs weak magnetism speed expansion runs, reduce the d shaft current of the axial stator winding of motor, this makes considerable rotor flux enter axially in axial iron core, significantly reduce the radial direction main flux of motor, radial stator is made to be operated under weak magnetic stripe part, enlarge markedly the speed adjustable range of motor, it is achieved weak magnetism speed expansion。
The number of turn of motor radial stator winding of the present invention and the axial stator winding number of poles according to real electrical machinery, permanent magnet residual magnetism density, permanent magnet lays compound mode and motor speed range of operation appropriate design selects, purpose is so that the axial stationary part of motor can either effectively change the radial direction main flux of motor, thus possessing enough weak magnetic energy power, when not needing weak magnetic, enough power torques can be produced again, enlarge markedly power density and the torque density of motor。
Motor of the present invention can separately design the shape of motor magnet radial poles and end fan ring magnetic pole and the number of turn of armature winding, by both reasonable combination superpositions, offset the harmonic wave and cogging torque that weaken counter electromotive force, improve and optimize the back emf waveform of motor with this, and weaken the cogging torque of motor, overcome existing permagnetic synchronous motor and skewed slot must be adopted to suppress harmonic wave the shortcoming weakening cogging torque。
Further, motor provided by the invention can use following field:
(1) household appliance technical field: include TV audio and video equipment, fan, air-conditioner, food processor, cosmetic tool, lampblack absorber etc.。
(2) computer and ancillary equipment field thereof: include computer (driver, fan etc.), printer, drawing apparatus, CD-ROM drive, CD writer etc.。
(3) field of industrial production: include industrial drives device, material processing system, automation equipment, robot etc.。
(4) automotive field: include permanent magnet starting motor, wiper motor, door-lock motor, seat lifting motor, sunshading ceiling motor, clean pump motor, recorder motor, glass lifting motor, radiator cooling fan motor, air conditioner motor, antenna lifting motor, Oil pump electrical machinery etc.。
(5) public life field: include clock and watch, beauty treatment machinery, automatic vending machine, ATM, paper money counter etc.。
(6) traffic and transport field: include electric car, aircraft auxiliary equipment, naval vessel etc.。
(7) space industry: include rocket, satellite, spacecraft, space shuttle etc.。
(8) national defence: include tank, guided missile, submarine, aircraft etc.。
(9) medical field: include dental drill, artificial heart, medical apparatus and instruments etc.。
(10) power field: include wind-power electricity generation, cogeneration, miniature hydro-power generation, small-sized internal combustion generating set electromotor and the pilot exciter etc. of high-rating generator。
Above-mentioned application has only to replace with motor or starter the motor of the present invention, it is not necessary to those skilled in the art pay performing creative labour, therefore, also should belong to protection scope of the present invention。
Embodiment one
As shown in Fig. 1 (a)-Fig. 1 (e), present embodiment number of motor phases is 3, the radial stator number of teeth is 24, the axial stator number of teeth is 12, rotor slot number is 4, permanent magnet blocks number is 4, magnet radial poles number is 4, axial magnetic number of poles is 4, present embodiment includes radial stator, axial stator and rotor, radial stator is formed by silicon steel plate stacking, radial stator includes radial stator tooth 1, radial stator yoke 2 and radial stator groove 3, radially armature winding 4 is laid in radial stator groove 3, radially armature winding 4 can be Distributed Winding, concentratred winding or lap winding, radially the number of poles of armature winding is consistent with rotor radial magnetic pole number of poles, radial stator and rotor coaxial, radial air gap 5 is had between radial stator and rotor, axial stator is formed by silicon-steel sheet coiled is folded, axial stator includes axial stator tooth 6, axial stator yoke 7 and axial stator groove 8, axial armature winding 9 is laid in axial stator groove 8, axial armature winding 9 can be Distributed Winding, concentratred winding or lap winding, the number of poles of axial armature winding is consistent with rotor axial magnetic pole number of poles, axial stator and rotor are concentric, axial air-gap 10 is had between axial stator and rotor, soft magnetism composite rotors 11 tangentially has rotor slot 12, permanent magnet 13 is laid in rotor slot 12, the magnetizing direction of adjacent two pieces of permanent magnets is contrary, adjacent two pieces of permanent magnets and between soft magnetism composite rotors iron core be radially formed magnet radial poles 14, adjacent two pieces of permanent magnets and between the end axial component of soft magnetism composite rotors iron core be processed into fan ring-shaped, form magnet radial poles 15, the magnetic flux that permanent magnet produces enters radial stator iron core by magnet radial poles through radial air gap and interlink with radially armature winding and form radial direction main flux, the magnetic flux that permanent magnet produces enters axial stator iron core by axial pole through axial air-gap and interlinks with axial armature winding and to form axial main flux, radially main flux is in parallel with axial main flux, can by separately designing the length of radial air gap and axial air-gap and controlling empty load of motor time radial direction main flux and axial main flux, when motor runs, by applying axial main flux when d shaft current dynamically regulates the operation of motor and radially main flux to radial direction armature winding and axial armature winding, weak magnetic control is realized with this, widen the output-constant operation region of motor。
Embodiment two
As shown in Fig. 2 (a)-Fig. 2 (e), the main distinction of embodiment two and embodiment one is, (1) in embodiment two all there is axial stator in two ends of motor, and two ends of motor soft magnetism composite rotors iron core are processed into the shape formation axial pole of fan ring, and only there is axial stator an end of motor in embodiment one, motor rotor core only one of which end is processed into the shape of fan ring and is formed axial pole, (2) in embodiment two, the arrangement mode of permanent magnet is different from the arrangement mode of embodiment one, in embodiment one, permanent magnet is single parallel-connection structure, and permanent magnet is series parallel structure in embodiment two。Present embodiment number of motor phases is 3, the radial stator number of teeth is 24, the axial stator number of teeth is 12, rotor slot number is 4, permanent magnet blocks number is 4, magnet radial poles number is 4, axial magnetic number of poles is 4, present embodiment includes radial stator, axial stator and rotor, radial stator is formed by silicon steel plate stacking, radial stator includes radial stator tooth 1, radial stator yoke 2 and radial stator groove 3, radially armature winding 4 is laid in radial stator groove 3, radially armature winding 4 can be Distributed Winding, concentratred winding or lap winding, radially the number of poles of armature winding is consistent with rotor radial magnetic pole number of poles, radial stator and rotor coaxial, radial air gap 5 is had between radial stator and rotor, axial stator is formed by silicon-steel sheet coiled is folded, axial stator includes axial stator tooth 6, axial stator yoke 7 and axial stator groove 8, axial armature winding 9 is laid in axial stator groove 8, axial armature winding 9 can be Distributed Winding, concentratred winding or lap winding, the number of poles of axial armature winding is consistent with rotor axial magnetic pole number of poles, axial stator and rotor are concentric, axial air-gap 10 is had between axial stator and rotor, soft magnetism composite rotors 11 tangentially has rotor slot 12, permanent magnet 13 is laid in rotor slot 12, the magnetizing direction of adjacent two pieces of permanent magnets is contrary, adjacent two pieces of permanent magnets and between soft magnetism composite rotors iron core be radially formed magnet radial poles 14, adjacent two pieces of permanent magnets and between the end axial component of soft magnetism composite rotors iron core be processed into fan ring-shaped, form magnet radial poles 15, the magnetic flux that permanent magnet produces enters radial stator iron core by magnet radial poles through radial air gap and interlink with radially armature winding and form radial direction main flux, the magnetic flux that permanent magnet produces enters axial stator iron core by axial pole through axial air-gap and interlinks with axial armature winding and to form axial main flux, radially main flux is in parallel with axial main flux, can by separately designing the length of radial air gap and axial air-gap and controlling empty load of motor time radial direction main flux and axial main flux, when motor runs, by applying axial main flux when d shaft current dynamically regulates the operation of motor and radially main flux to radial direction armature winding and axial armature winding, weak magnetic control is realized with this, widen the output-constant operation region of motor。
The specific embodiment of the present invention is described in conjunction with accompanying drawing although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme, those skilled in the art need not pay various amendments or deformation that creative work can make still within protection scope of the present invention。

Claims (10)

1. a multiple stators mixed magnetic circuit permagnetic synchronous motor, it is characterized in that: include radial stator, axial stator and rotor, wherein, it is placed with permanent magnet in described rotor, described permanent magnet makes generation magnetic flux on rotor, a part of magnetic flux enters in the middle of radial stator along the radial direction of motor by radial air gap, form radially main flux, another part magnetic flux in axial direction enters in the middle of axial stator by axial air-gap, form axial main flux, radially main flux and axial main flux composition mixed magnetic circuit, by regulating and controlling mixed magnetic circuit, motor is made to realize in the conversion increased between magnetic running status and weak magnetism speed expansion running status。
2. a kind of multiple stators mixed magnetic circuit permagnetic synchronous motor as claimed in claim 1, it is characterized in that: specifically include radial stator, axial stator and rotor, wherein, described rotor is set in inside radial stator, coaxially lay with radial stator, the one or both ends of described rotor are provided with axial stator, and axial stator is concentric with rotor to be laid;
It is provided with radially winding in the stator slot of described radial stator, in the stator slot of described axial stator, is provided with axial winding;
Described rotor is provided with rotor slot, permanent magnet it is placed with in rotor slot, described permanent magnet makes to produce on rotor magnet radial poles and axial pole, described magnet radial poles is towards motor radial stator, described axial pole is towards motor axial stator so that motor radially, axially all produces torque, forms mixed magnetic circuit, by regulating and controlling mixed magnetic circuit, motor is made to realize in the conversion increased between magnetic running status and weak magnetism speed expansion running status。
3. a kind of multiple stators mixed magnetic circuit permagnetic synchronous motor as claimed in claim 1, is characterized in that: there is radial air gap between described radial stator and rotor outer, there is axial air-gap between described axial stator and rotor tip;Described radial direction main flux and the magnetic field interaction that radially armature winding produces produce torque, and the magnetic field interaction that axial main flux and axial armature winding produce produces torque。
4. a kind of multiple stators mixed magnetic circuit permagnetic synchronous motor as claimed in claim 1, it is characterized in that: described radial stator, including stator slot, stator tooth and stator yoke, wherein, stator yoke is circular, and stator tooth has multiple, is distributed along stator yoke even circumferential, there is stator slot between stator tooth, in described stator slot, be placed with radially winding;
Described axial stator includes axial stator back yoke, axial stator groove and axial stator tooth, described axial stator back yoke is positioned at the axial side of axial stator, axial stator tooth is arranged in axial stator back yoke, it is provided with axial stator groove between axial stator tooth, in axial stator groove, lays axial winding。
5. a kind of multiple stators mixed magnetic circuit permagnetic synchronous motor as claimed in claim 1, it is characterized in that: the radial direction main flux of described motor and axial main flux are parallel relationship, empty load of motor radially main flux and axial main flux accounting are determined by the length of radial air gap and axial air-gap。
6. a kind of multiple stators mixed magnetic circuit permagnetic synchronous motor as claimed in claim 1, it is characterized in that: described number of motor phases m >=3, number of pole-pairs p >=1, radially armature winding and axial armature winding are Single-layer Windings or Double Layer Winding, the magnetic field number of poles that radially armature winding produces is equal with magnet radial poles number of poles, and the number of poles in the magnetic field that axial armature winding produces is equal with axial pole number of poles。
7. a kind of multiple stators mixed magnetic circuit permagnetic synchronous motor as claimed in claim 1, it is characterized in that: described rotor is that soft-magnetic composite material is made, rotor is provided with the groove laying permanent magnet, described rotor tip is processed into fan ring-shaped, forming axial pole, the number of poles of axial pole and the number of poles of magnet radial poles are equal。
8. regulate and control method based on the magnetic flux of the motor according to any one of such as claim 1-7, it is characterized in that: the rated speed according to motor work, nominal torque and performance requirement, the number of turn of the radial air gap length of motor, axial air-gap length and radial direction armature winding and axial armature winding is set, determine that motor radial stator and acting as of axial stator produce main driving torque or realize weak magnetic, to determine the duty of motor。
9. magnetic flux regulation and control method as claimed in claim 8, is characterized in that: the duty of described motor specifically includes three kinds:
(1) axial armature winding applies d shaft current, and radial stator produces main driving torque, and axial stator realizes weak magnetic function and produces power torque;
(2) radially armature winding applies d shaft current, and axial stator produces main driving torque, and radial stator realizes weak magnetic function and produces power torque;
(3) the radial direction armature winding of motor and axial armature winding all do not apply d shaft current, all only produce q shaft current, radially main flux and radial stator armature field produce driving torque, axial main flux and axial stator armature field produce driving torque, and motor torque density and power density reach maximum。
10. an electric automobile, is characterized in that: include a kind of multiple stators mixed magnetic circuit permagnetic synchronous motor as according to any one of claim 1-7。
CN201610247112.6A 2016-04-20 2016-04-20 A kind of multiple stators mixed magnetic circuit permagnetic synchronous motor and method Active CN105703583B (en)

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CN107579637A (en) * 2017-08-17 2018-01-12 东南大学 A kind of axial radial flux magneto
CN109194071A (en) * 2018-11-05 2019-01-11 山东大学 Weak magnetic multiple stators six-phase permanent-magnet synchronous driving motor, electric car and its method
CN109217602A (en) * 2018-11-05 2019-01-15 山东大学 Multi-phase permanent synchronous driving motor, application and its method
CN109361300A (en) * 2018-11-05 2019-02-19 山东大学 Double three-phase permanent-magnetic synchronous driving motor, electric car and its method
CN109361302A (en) * 2018-11-05 2019-02-19 山东大学 Multiple stators are along pole formula six-phase permanent-magnet synchronous driving motor, application and its method

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US20080036331A1 (en) * 2006-08-08 2008-02-14 Toyota Jidosha Kabushiki Kaisha Rotating electric machine
US20100079025A1 (en) * 2008-09-29 2010-04-01 Hitachi, Ltd Sintered Magnet and Rotating Machine Equipped with the Same
JP2011067048A (en) * 2009-09-18 2011-03-31 Sanyo Electric Co Ltd Permanent magnet synchronous motor
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107579637A (en) * 2017-08-17 2018-01-12 东南大学 A kind of axial radial flux magneto
CN109194071A (en) * 2018-11-05 2019-01-11 山东大学 Weak magnetic multiple stators six-phase permanent-magnet synchronous driving motor, electric car and its method
CN109217602A (en) * 2018-11-05 2019-01-15 山东大学 Multi-phase permanent synchronous driving motor, application and its method
CN109361300A (en) * 2018-11-05 2019-02-19 山东大学 Double three-phase permanent-magnetic synchronous driving motor, electric car and its method
CN109361302A (en) * 2018-11-05 2019-02-19 山东大学 Multiple stators are along pole formula six-phase permanent-magnet synchronous driving motor, application and its method
CN109361302B (en) * 2018-11-05 2020-03-31 山东大学 Multi-stator consequent-pole type six-phase permanent magnet synchronous driving motor, application and method thereof

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