CN104009601B - A kind of composite construction double winding bearing-free switch reluctance motor - Google Patents
A kind of composite construction double winding bearing-free switch reluctance motor Download PDFInfo
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- CN104009601B CN104009601B CN201410228150.8A CN201410228150A CN104009601B CN 104009601 B CN104009601 B CN 104009601B CN 201410228150 A CN201410228150 A CN 201410228150A CN 104009601 B CN104009601 B CN 104009601B
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Abstract
本发明公开了一种复合结构双绕组无轴承开关磁阻电机。所述电机包括电机定子、电机转子和电机绕组；所述电机定子由磁阻电机定子、隔磁盘定子和磁轴承定子构成；电机转子由磁阻电机转子、隔磁盘转子和磁轴承转子构成；磁轴承定子为［型结构，磁轴承转子为圆柱结构；磁阻电机定子、转子均为凸极结构；所述电机绕组包括转矩绕组和悬浮力绕组；每个转矩绕组缠绕在磁阻电机定子、隔磁盘定子及磁轴承定子［型铁心的一个齿之上；每个悬浮力绕组缠绕在磁轴承定子[型铁心的另一个齿上。本发明磁阻电机转子产生转矩，悬浮力转子产生悬浮力，结构上实现了转矩和悬浮力的解耦；悬浮导通区间，运动电动势为零，削除了运动电动势对电流斩波控制的影响，改善了电流实时控制效果。
The invention discloses a composite structure double winding bearingless switched reluctance motor. The motor includes a motor stator, a motor rotor and a motor winding; the motor stator is composed of a reluctance motor stator, a spacer stator and a magnetic bearing stator; the motor rotor is composed of a reluctance motor rotor, a spacer rotor and a magnetic bearing rotor; The bearing stator is a [type structure, and the magnetic bearing rotor is a cylindrical structure; the stator and rotor of the reluctance motor are salient pole structures; the motor windings include torque windings and suspension force windings; each torque winding is wound on the stator of the reluctance motor , Spacer disk stator and magnetic bearing stator [type iron core on one tooth; each levitation force winding is wound on the other tooth of the magnetic bearing stator [type iron core. The rotor of the reluctance motor of the present invention generates torque, and the suspension force rotor generates suspension force, and the decoupling of torque and suspension force is realized structurally; in the suspension conduction section, the motion electromotive force is zero, and the influence of motion electromotive force on current chopping control is eliminated The impact improves the real-time control effect of the current.
Description
Technical field
The invention belongs to technical field of motors, relate to a kind of composite construction double winding bearing-free switch reluctance motor.
Background technology
Bearing-free switch reluctance motor is the novel magnetically levitated motor of one grown up for 20 end of the centurys.By quantity stator being wound with winding, simplex winding and double-winding structure can be divided into.Composite construction double winding bearing-free switch reluctance motor be by produce the suspending windings of suspending power together with the winding of original switched reluctance machines lap wound on the stator of motor, by controlling double winding electric current and make it have to rotate and from suspending power simultaneously, thus the ultrahigh speed realizing motor is run.
Close coupling relation is there is between the torque of composite construction double winding bearing-free switch reluctance motor and suspending power, and full decoupled both being difficult to realize in control strategy and Mathematical Modeling, this is that composite construction double winding bearing-free switch reluctance motor suspends and runnability is difficult to one of principal element of raising.In addition, needed for suspending power control, chop control must be carried out to winding current, and during high-speed cruising, the double action of Based Motional Electromotive Force and induced electromotive force causes to carry out tracking chop control to electric current, namely there will be and cut phenomenon incessantly, this have impact on the performance of composite construction double winding bearing-free switch reluctance motor high speed performance greatly.
For solving above-mentioned two shortcomings of composite construction double winding bearing-free switch reluctance motor, Nanjing Aero-Space University proposes series excitation formula double winding bearing-free switch magnetic-resistance generator by the connected mode changing traditional 12/8 electrode structure composite construction double winding bearing-free switch reluctance motor suspending windings.Three-phase suspending windings series connection on same direction is a set of winding by it, and such suspending windings magnetic conductance is invariable a rotor cycle, and levitating current does not produce torque.Due to suspending windings and torque winding magnetic circuit altogether, between double winding and Coupling Between Phases intensity large, only partly can solve torque and suspending power coupled problem.Suspending windings enamelled wire demand is large, take copper, and winding utilizes low; In addition, this motor only as generator, can limit its range of application.
Summary of the invention
The present invention seeks to propose that a kind of suspending power is separated with suspending power magnetic circuit with torque decoupler, torque magnetic circuit, high-speed adaptability is strong and the novel double winding bearing-free switch reluctance motor that radial bearing capacity is large.
The present invention for achieving the above object, adopts following technical scheme:
A kind of composite construction double winding bearing-free switch reluctance motor, comprises motor stator, rotor and motor winding;
Described motor stator by reluctance motor stator, form every disk stator and magnetic bearing stator, is describedly between reluctance motor stator and magnetic bearing stator every disk stator;
Described rotor is by magnetic resistance motor rotor, form every disk rotor and magnetic bearing rotor; Describedly be between magnetic resistance motor rotor and magnetic bearing rotor every disk rotor;
Described reluctance motor stator and the magnetic bearing stator number of teeth are 12, reluctance motor stator iron core is salient-pole structure, ［ iron-core combines magnetic bearing stator, and [iron-core opening part is right against magnetic bearing rotor, and each ［ iron-core comprises two salient pole teeth by 12; Magnetic bearing stator, every disk stator and the alignment of reluctance motor stator axial tooth, and the facewidth is all identical;
Described magnetic bearing rotor arrangements is in magnetic bearing stator, and every disk rotor arrangements in disk stator, magnetic resistance motor rotor is arranged in reluctance motor stator; Magnetic resistance motor rotor and be 8 pole salient-pole structures every disk rotor, magnetic bearing rotor is column structure;
Described motor winding comprises torque winding and levitation force winding; Described torque winding has 12, each torque winding be wrapped in reluctance motor stator, every disk stator and magnetic bearing stator on a tooth of iron-core, this tooth ratio another tooth of iron-core and reluctance motor stator near; Described levitation force winding has 12, and each levitation force winding is wrapped in magnetic bearing stator [on another tooth of iron-core;
Described bearing-free switch reluctance motor is three phase electric machine, every phase winding is made up of a set of torque winding and two cover levitation force winding, wherein, described a set of torque winding is in series by 4 torque winding forwards of 90 ° of being spatially separated by, and the magnetic flux that 4 torque windings produce is that NSNS is alternately distributed; Two cover levitation force winding are formed by connecting by 4 coils be on 4 magnetic bearing stator tooths of same circumferential position with reluctance motor stator respectively, concrete connected mode is, two pairs of coil differential concatenations of being separated by the bearing stator tooth of 180 ° are a set of levitation force winding, and two other coil differential concatenation of being separated by 180 ° is another set of levitation force winding; The magnetic flux that two cover levitation force winding produce is NNSS distribution.
The invention has the beneficial effects as follows: the present invention proposes a kind of composite construction double winding bearing-free switch reluctance motor, adopt technical scheme of the present invention, there is following technique effect:
(1) suspending power and torque decoupler, high speed suspendability is good;
(2) the similar radial direction magnetic bearing of suspend control, it is convenient to control;
(3) eliminated the impact on winding Current cut control of Based Motional Electromotive Force, the real-time control effects of electric current is good;
(4) radial suspension force is large, and high-speed adaptability is strong;
(5) each suspension magnetic circuit is mutually separated, and torque magnetic circuit and suspension magnetic circuit are also isolated, and flux coupled is weak.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure schematic diagram of motor of the present invention.
Fig. 2 is the magnetic flux magnetic circuit schematic diagram of motor of the present invention.
Fig. 3 is A phase torque winding construction and the magnetic flux distribution schematic diagram of motor of the present invention.
Fig. 4 is the A phase levitation force winding structural representation of motor of the present invention.
Fig. 5 is the schematic diagram of the A phase torque winding inductance of motor of the present invention, torque winding current and levitation force winding electric current.
Fig. 6 is A phase levitation force winding inductance and the suspending power FEM Numerical Simulation of motor of the present invention.
Fig. 7 is the torque FEM Numerical Simulation that the A phase torque winding of motor of the present invention produces.
In description of reference numerals: Fig. 1 to Fig. 7,1 is that reluctance motor stator is unshakable in one's determination, and 2 is magnetic resistance motor rotors, 3 is magnetic bearing stator cores, and 4 is magnetic bearing rotors, and 5 is every disk stator, 6 is every disk rotor, and 7 is torque windings, and 8 is levitation force winding, 9 is first air gaps, 10 is interstices, and 11 is magnetic fluxs that torque winding current produces in magnetic bearing, and 12 is magnetic fluxs that levitation force winding electric current produces, 13 is four pole magnetic fluxs that torque winding current produces in reluctance motor, and 14 is A phase torque winding N
ma, 15,16 inflow currents being respectively torque winding
i ma + and flow out electric current
i ma -, 17, the 18 levitation force winding N being respectively A phase α, β direction
sa1and N
sa2, 19,20 inflow currents being respectively α direction levitation force winding
i sa1
+ and flow out electric current
i sa1
-, 21,22 inflow currents being respectively β direction levitation force winding
i sa2
+ and flow out electric current
i sa2
-, 23,24 both direction α and the β being respectively rectangular coordinate system, 25 is A phase torque winding N
mainductance finite element simulation value, 26 is the current diagram of A phase torque winding, and 27 is A phase α positive direction suspending windings N
sa1current diagram, 28 is A phase β positive direction suspending windings N
sa2current diagram, 29 is inductance finite element simulation values of A phase levitation force winding, 30 is the suspending power finite element simulation value that the acting in conjunction of A phase winding produces, and 31 is the torque finite element simulation value that A phase torque winding produces, and I, II, III represents three excitation intervals respectively.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme of a kind of composite construction double winding of the present invention bearing-free switch reluctance motor is described in detail:
As shown in Figure 1, the three-dimensional structure schematic diagram of a kind of composite construction double winding bearing-free switch reluctance motor of the present invention, wherein, 1 for reluctance motor stator is unshakable in one's determination, 2 be that magnetic resistance motor rotor is unshakable in one's determination, 3 are magnetic bearing stator cores, 4 to be magnetic bearing rotor cores, 5 be every disk stator, 6 is are torque windings, 8 every disk rotor, 7 are levitation force winding.
Described motor stator by reluctance motor stator, formed by axial superposition every disk stator and magnetic bearing stator, wherein every disk stator arrangement between reluctance motor stator and magnetic bearing stator; Reluctance motor stator and the magnetic bearing stator number of teeth are 12, reluctance motor stator iron core is salient-pole structure, 12 ［ iron-core common combination is magnetic bearing stator, and [iron-core opening part is right against magnetic bearing rotor, and each magnetic bearing stator comprises two salient pole teeth separately; Magnetic bearing stator, be axially in tooth and tooth aligned condition every disk stator and reluctance motor stator, and three's stator facewidth is identical, to facilitate coiling, simplification wire winding.
Described motor winding, comprises torque winding and levitation force winding two class winding, and wherein, each torque winding is wrapped in reluctance motor stator, every disk stator and with it on a close magnetic bearing stator tooth, has 12; Each levitation force winding is wrapped in magnetic bearing stator, and [on another tooth of iron-core, this stator tooth, away from reluctance motor stator, has 12.
Described rotor is by magnetic resistance motor rotor, consist of axial superposition every disk rotor and magnetic bearing rotor, every disk rotor arrangements between magnetic resistance motor rotor and magnetic bearing rotor, wherein magnetic bearing rotor arrangements is in magnetic bearing stator, every disk rotor arrangements in disk stator, magnetic resistance motor rotor is arranged in reluctance motor stator; Magnetic resistance motor rotor is unshakable in one's determination and be 8 pole salient-pole structures every disk rotor, and magnetic bearing rotor core is column structure;
Described motor is three-phase system motor, every phase winding is made up of a set of torque winding and two cover levitation force winding, wherein, a set of torque winding is in series by 4 torque winding forwards of 90 ° of being spatially separated by, and the magnetic flux that 4 torque windings produce is that NSNS is alternately distributed; Two cover levitation force winding are formed by connecting by 4 coils be on 4 magnetic bearing stator tooths of same circumferential position with reluctance motor stator respectively, concrete connected mode is, two pairs of coil differential concatenations of being separated by the bearing stator tooth of 180 ° are a set of levitation force winding, and two other coil differential concatenation of being separated by 180 ° is another set of levitation force winding; The magnetic flux that two cover levitation force winding produce is NNSS distribution.
Fig. 2 is a kind of composite construction double winding of the present invention bearing-free switch reluctance motor magnetic flux magnetic circuit schematic diagram.As A phase torque winding N
mawith β direction levitation force winding N
sa2during conducting, the magnetic flux that both produce is at the first air gap prescription to identical, and magnetic flux strengthens, and at interstice prescription on the contrary, magnetic flux weakens, and causes the magnetic flux at the first air gap place to be greater than the magnetic flux at interstice place, and then produces the suspending power of a β positive direction; As change β direction levitation force winding N
sa2sense of current, by the suspending power of a generation β negative direction.In like manner, levitation force winding N
sa1also a α direction suspending power can be produced, conservative control torque winding N during conducting
ma, levitation force winding N
sa1with levitation force winding N
sa2electric current can produce the suspending power in arbitrary size and direction.
Fig. 3 is A phase torque winding construction and the magnetic flux distribution schematic diagram of a kind of composite construction double winding of the present invention bearing-free switch reluctance motor.A phase torque winding is formed by the coils connected in series being distributed in 4 relative teeth, is spatially separated by 90 ° each other, the four extremely symmetrical magnetic fluxs that A phase torque winding current produces, and distributes in NSNS.When A phase torque winding conducting, the magnetic field produced in reluctance motor, for generation of torque, the magnetic field produced in magnetic axis is for the bias magnetic field of suspend control.; The torque winding of B, C phase is identical with A phase torque winding construction, only differs 30 ° and-30 ° in position with A phase.
Fig. 4 is the A phase levitation force winding structural representation of a kind of composite construction double winding of the present invention bearing-free switch reluctance motor.A phase α, β direction levitation force winding are formed by the winding differential concatenation on magnetic bearing two relative teeth, and produce the symmetrical magnetic flux in the two poles of the earth, magnetic circuit is mutually isolated each other, distributes in NS; The levitation force winding of B, C phase is identical with A phase levitation force winding structure, only differs 30 ° and-30 ° in position with A phase.
Fig. 5 is the schematic diagram of the A phase torque winding inductance of a kind of composite construction double winding of the present invention bearing-free switch reluctance motor, torque winding current and levitation force winding electric current.Definition stator tooth and rotor aligned position are zero degree position, are and do not line up position.For three-phase 12/8 pole bearing-free switch reluctance motor, a rotor cycle angle is 45 °, then the interval that every phase winding produces suspending power is 15 °, and the stable suspersion of such guarantee motor runs.
For A phase, the operational mode of a kind of composite construction double winding of the present invention bearing-free switch reluctance motor is described.Arranging rotor position angle is
θ,
θin ∈ [-7.5 °, 7.5 °], due to torque winding self-induction distribution relative smooth, be conducive to weakening motion electromotive force to the impact of Current cut control, thus Current cut control method can be adopted to realize the Instantaneous Control of radial suspension force.Motor operation mode of operation can be designed as follows:
when motoring, at [-7.5 °, 7.5 °] interior (IIth district), open the master power switch of each winding of A phase with different drive singal simultaneously, the size of control A phase torque winding current and α direction levitation force winding and β direction suspending windings size of current and direction respectively, produce the suspending power acting on rotor, torque now is then produced by the torque winding excitation of B phase.At [7.5 °, 22.5 °] interior (IIIth district), A phase suspension excitation terminates, two levitation force winding turn off, and torque winding then continues conducting, produce torque, concrete current control method can adopt chopper current to control, PWM controls, and mono pulse control, and now suspending power is produced by the conducting of C phase winding.As can be seen here, the torque winding excitation phase sequence when electric operation is BA-AC-CB, and levitation force winding excitation phase sequence is A-C-B.
when generator operation, can select at corner
θin ∈ [-22.5 ° ,-7.5 °], (Ith district) opens the master power switch of A phase torque winding, and outwards export electric energy, now suspending power is produced by B phase winding.Still in [-7.5 °, 7.5 °] (IIth district), control A phase torque winding and suspending power are around electric current simultaneously, and produce the suspending power acting on rotor, now C phase enters generating state.Therefore, the torque winding excitation phase sequence when generator operation is CA-AB-BC, and levitation force winding excitation phase sequence is A-B-C.
Suspending power control principle is: A phase suspension excitation interval is [-7.5 °, 7.5 °], and α direction suspending power is by torque winding current
i ma with α direction levitation force winding electric current
i sa1
control, when
i sa1
during >0, α positive direction suspending power on product, otherwise, produce α negative direction suspending power; In like manner, β direction suspending power is by torque winding current
i ma with β direction levitation force winding electric current
i sa2
control, when
i sa2
during >0, β positive direction suspending power on product, otherwise, produce β negative direction suspending power; α direction and β direction suspending power can synthesize the suspending power of any direction, therefore overlap winding current by conservative control 3, can produce the suspending power of any direction and size, and then realize the function that certainly suspends of motor.In like manner, the suspending power that [-22.5 ° ,-7.5 °] and [7.5 °, 22.5 °] are interval respectively by B phase and the generation of C phase winding, and then can realize the suspension operation in whole rotor cycle.
Fig. 6 is A phase levitation force winding inductance and the suspending power FEM Numerical Simulation of a kind of composite construction double winding of the present invention bearing-free switch reluctance motor.A phase torque winding N during emulation
mawith β direction levitation force winding N
sa2all apply a constant current, the inductance respectively during calculating different rotor position and suspension force value.Simulation result shows, and the inductance of levitation force winding is constant, therefore can eliminate the impact of Based Motional Electromotive Force on Current cut control.In A phase suspension excitation interval [-7.5 °, 7.5 °], the suspending power of generation is also constant, is conducive to suspend control, and torque winding and levitation force winding electric current can be made as square in [-7.5 °, 7.5 °] internal control.
Fig. 7 is the torque FEM Numerical Simulation that the A phase torque winding of a kind of composite construction double winding of the present invention bearing-free switch reluctance motor produces.Only A phase torque winding N during emulation
maapply a constant current value, calculate the torque that different rotor position produces respectively.Simulation result shows, in A phase suspension excitation interval [-7.5 °, 7.5 °], and the positive antisymmetry of torque of generation, and numerical value is very little, this interval internal torque composite value is zero, can think that this interval does not produce torque.Therefore, suspension excitation interval only has suspending power to produce, and exports without torque, achieves the decoupling zero of torque and suspending power.
In sum, the magnetic resistance motor rotor of salient-pole structure of the present invention is for generation of torque, and the magnetic bearing rotor of column structure is for generation of suspending power; Structurally achieve the decoupling zero of torque and suspending power; Suspension conducting is interval, and the inductance of torque winding and levitation force winding is constant, and Based Motional Electromotive Force is zero, has eliminated the impact on winding Current cut control of Based Motional Electromotive Force, improves the real-time control effects of electric current.
For those skilled in the art, according to above implementation type can be easy to association other advantage and distortion.Therefore, the present invention is not limited to above-mentioned instantiation, and it carries out detailed, exemplary explanation as just example to a kind of form of the present invention.Not deviating from the scope of present inventive concept, the technical scheme that those of ordinary skill in the art are obtained by various equivalent replacement according to above-mentioned instantiation, all should be included within right of the present invention and equivalency range thereof.
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| CN201410228150.8A CN104009601B (en) | 2014-05-27 | 2014-05-27 | A kind of composite construction double winding bearing-free switch reluctance motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410228150.8A CN104009601B (en) | 2014-05-27 | 2014-05-27 | A kind of composite construction double winding bearing-free switch reluctance motor |
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| Publication Number | Publication Date |
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| CN104009601A CN104009601A (en) | 2014-08-27 |
| CN104009601B true CN104009601B (en) | 2016-02-10 |
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Families Citing this family (5)
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| CN105024507B (en) * | 2015-07-22 | 2017-07-07 | 南京邮电大学 | A kind of axial block form mixed structure bearing-free switch reluctance motor and control method |
| CN107547011B (en) * | 2017-09-19 | 2019-03-12 | 南京埃克锐特机电科技有限公司 | A kind of radial-axial hybrid magnetic bearing switched reluctance motor system and control method |
| CN107547010B (en) * | 2017-09-19 | 2019-03-19 | 南京埃克锐特机电科技有限公司 | A kind of electromagnetic bearing switch reluctance motor system and control method |
| CN113765321B (en) * | 2021-08-20 | 2022-09-16 | 江苏大学 | Double-suspension-force bearing-free asynchronous motor |
| CN113964962B (en) * | 2021-10-18 | 2022-09-30 | 哈尔滨工业大学 | A block type radial magnetic circuit electromagnetic bearing axial magnetic circuit position sensor system |
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Application publication date: 20140827 Assignee: Jiangsu Nanyou IOT Technology Park Ltd. Assignor: NANJING University OF POSTS AND TELECOMMUNICATIONS Contract record no.: 2016320000221 Denomination of invention: Duplex-winding bearing-free switched reluctance motor of composite structure Granted publication date: 20160210 License type: Common License Record date: 20161129 |
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