CN108390531A - Resonance asynchronous machine and its control method - Google Patents

Resonance asynchronous machine and its control method Download PDF

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Publication number
CN108390531A
CN108390531A CN201810054362.7A CN201810054362A CN108390531A CN 108390531 A CN108390531 A CN 108390531A CN 201810054362 A CN201810054362 A CN 201810054362A CN 108390531 A CN108390531 A CN 108390531A
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China
Prior art keywords
resonance
rotor
frequency
resonant
rotor windings
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CN201810054362.7A
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CN108390531B (en
Inventor
钟再敏
秦进
秦一进
胡程宇
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Tongji University
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Tongji University
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K17/00Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02Asynchronous induction motors
    • H02K17/12Asynchronous induction motors for multi-phase current
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K17/00Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02Asynchronous induction motors
    • H02K17/30Structural association of asynchronous induction motors with auxiliary electric devices influencing the characteristics of the motor or controlling the motor, e.g. with impedances or switches
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28Layout of windings or of connections between windings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/22Current control, e.g. using a current control loop
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2213/00Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2207/00Indexing scheme relating to controlling arrangements characterised by the type of motor
    • H02P2207/01Asynchronous machines

Abstract

The present invention relates to a kind of resonance asynchronous machine and its control methods, the resonance asynchronous machine includes stator winding and at least two-phase rotor windings, each rotor windings are arranged to determining space quadrature, it is characterized in that, it further include resonance energy-storage travelling wave tube, and each rotor windings are electrically connected with corresponding resonance energy-storage travelling wave tube and constitute resonant tank, the resonant frequency relative error of each resonant tank is less than 50%;Motor output characteristics can be further increased by the way that additive excitation circuit is arranged, the driving voltage frequency of additive excitation circuit and the resonant frequency relative error of resonant tank are less than or equal to 25%.Difference on the frequency between alternating current frequency and the alternative frequency of rotor winding current of the control method by controlling stator winding so that each resonant tank works in quasi-resonance state or resonant condition.Compared with prior art, the present invention has many advantages, such as that simple and reliable for structure, low speed torque density is big, torque dynamic response is high.

Description

Resonance asynchronous machine and its control method
Technical field
The present invention relates to motors and control technology field, more particularly, to a kind of resonance asynchronous machine and its control method.
Background technology
Currently, in addition to permanent magnet excitation mode, there are mainly two types of methods for the external excitation of rotor magnetic field, are induced excitation respectively And electrical excitation.
Induced excitation method is based on electromagnetic induction principle and transmits electric energy, using AC induction motor as representative, rotor windings/lead Item short circuit forms magnetic field and relies on rotor speed difference and induce rotor by injecting the electric current of particular form in the stator coils Exciting current is held, the apparent deficiency of induced excitation mode is that efficiency is relatively low, and needs in stator side injection needle to the spy of excitation Determine directional current, causes relatively low using the electric efficiency and power factor of induced excitation mode.
Electrical excitation method directly injects exciting current to motor-spin-coil, and control is simple, efficient, can be divided into have brush and Brushless two kinds.But different excitation con-trol principles, determines the electromechanical properties of motor.
Therefore, it is necessary to be improved to the control of existing motor excitation.
In recent years, another wireless power transmission principle shows huge Technology Potential:I.e. resonance type wireless electric energy passes Defeated (Magnetically-Coupled Resonant WPT, MCR-WPT), its main feature is that two have identical intrinsic frequency Energy transmission is completed by magnetic field close coupling between subsystem.MCR-WPT is to be put forward for the first time for 2007, and MCR-WPT is in vehicle at present It carries the fields such as wireless (direct current) charging and has obtained extensive concern, research is very active.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of resonance asynchronous machines And its control method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of resonance asynchronous machine, including stator winding and at least two-phase rotor windings have between each rotor windings and determine Space phase,
Each rotor windings are both provided at least one resonance energy-storage travelling wave tube, and each rotor windings are stored up with corresponding resonance Energy element electrical connection constitutes resonant tank, and the resonant frequency relative error of each resonant tank is less than 50%, resonance energy storage Element and rotor synchronous rotary;
Further include additive excitation circuit, be electrically connected with the resonant tank, and alternating voltage is applied to resonant tank and is swashed It encourages, the resonant frequency relative error of driving voltage frequency and resonant tank is less than or equal to 25%.
Further, including rotor windings described in three-phase, each rotor windings are triangular in shape or Y-type layout.
Further, the stator winding and rotor windings are configured to form of straight lines.
Further, the additive excitation circuit includes non-contacting primary coil and secondary coil, the secondary coil With the resonant tank be electrically connected and with rotor windings synchronous rotary, realized on demand by primary coil to secondary coil apply Alternating magnetic field encourages.
A kind of control method of resonance asynchronous machine as mentioned, the electric current angular frequency that this method passes through control stator winding With the difference on the frequency between the rotation angular frequency of rotor windings so that each resonant tank works in quasi-resonance state or resonant condition.
Further, it is adjusted in synchronism frequency, amplitude and the phase of additive excitation circuit activation voltage, is ensureing each resonance time Under the premise of road works in quasi-resonance state or resonant condition, the adjusting of exciting current and torque is realized.
Compared with prior art, rotor is constructed to be permeable to the resonant tank of energy storage by the present invention, advanced by stator field Or lag behind rotor specific frequency and additive excitation excitation is constituted together to the excitation of the alternating magnetic field of rotor resonant tank, to So that rotor resonant tank is worked in quasi-resonance or resonant condition, has the advantages that:
1) rotor-exciting part is realized by the space alternating excitation of stator field, does not need specific excitation component, is improved The utilization rate of stator current;
2) in resonant condition, rotor field spatially keeps, torque dynamic control process pair orthogonal with stator field substantially Rotor parameter changes insensitive;
3) rotor-exciting is related to Stator energization current, and theoretically, torque output is not restricted by rotor-exciting capacity;
4) rotor-exciting can be adjusted, and can preferably take into account torque output under low speed restriction of current and high speed voltage about Power output under beam;
5) the high dynamic response quality of torque can be realized conveniently by the preferred design of rotor quality factor;
6) under certain high-speed operating mode, stator current frequency hysteresis can be controlled in mechanical separator speed, and then reduce stator side Eddy-current loss.
Description of the drawings
Fig. 1 is the structural schematic diagram of three phase resonance asynchronous AC motor rotors in the embodiment of the present invention 1;
Fig. 2 is another structural schematic diagram of three phase resonance asynchronous AC motor rotors in embodiment 1;
Fig. 3 is that rotor three-phase resonance type AC motor rotor position and current space vector indicate in embodiment 1;
Fig. 4 is 2 rotor two-phase orthogonal winding resonance type AC motor schematic diagram of the embodiment of the present invention;
Fig. 5 is that rotor two-phase orthogonal winding resonance type AC motor space vector indicates in embodiment 2;
Fig. 6 is stator and rotor current polar plot in the embodiment of the present invention 3;
Fig. 7 is the additive excitation coil schematic diagram that rotor is arranged in embodiment 3.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to Following embodiments.
The present invention realizes a kind of resonance asynchronous machine, including stator winding, at least two-phase rotor windings and resonance energy storage member Part, stator winding are powered by AC power, and then motivate stator equivalent current vector and the magnetic field of spatially continuous rotation, Each rotor windings have determining space phase at setting in space, so as to motivate the equivalent rotor electricity along any direction Stream.At least one resonance energy-storage travelling wave tube is set per phase rotor windings, and each rotor windings and corresponding resonance energy-storage travelling wave tube are electrical Resonant tank is connected and composed, the resonant frequency relative error of each resonant tank is less than 50%, ensures each phase winding to alternating magnetic field Excitation has almost the same resonance amplification factor.The asynchronous machine is additionally provided with additive excitation circuit, with the resonant tank Electrical connection, and resonant tank is synchronized and applies alternating voltage excitation, the resonant frequency phase of driving voltage frequency and resonant tank 25% is no more than to error, makes resonant tank accurate work in " current resonance " state, at this point, rotor excitation current is by inductance Resonance current provide, it is maximum to exciting current/voltage amplification factor.Resonance energy-storage travelling wave tube includes but not limited to capacitance.
When controlling above-mentioned resonance asynchronous machine, by the electric current angular frequency and rotor windings that control stator winding Rotate the difference on the frequency (advanced or lag) between angular frequency so that each resonant tank works in quasi-resonance state or resonance shape State, rotor current are orthogonal on stator current space.Further, quasi-resonance state or resonance are worked in each resonant tank When state, the adjusting that difference on the frequency realizes exciting current and torque can be adjusted.In the resonant frequency one of difference on the frequency and resonant tank When cause, reach torque capacity output.
Different according to rotor resonance quality factor, difference on the frequency adjustable range can also adjust, but should ensure that current resonance Amplification factor do not answer it is too low, with ensure rotor-exciting/current amplitude can guarantee torque output requirement.
In certain embodiments, the stator winding in resonance asynchronous machine and rotor windings can be configured to form of straight lines, Specific implementation is referred to the structure type of conventional linear motor.
Embodiment 1
As depicted in figs. 1 and 2, in the resonance asynchronous machine of the present embodiment, stator winding and rotor windings are respectively provided with three-phase, 120 ° of space (electricity) angles of rotor windings three-phase symmetrical and mutual deviation, due to the presence of rotor windings space angle difference, according to motor Learn principle be apparent from, when have in rotor electric current by when, equivalent space current phasor can be formed.
It is assumed that air-gap field Sine distribution, the electric current in stator coil can use vector representation, when stator three-phase current is pressed When sinusoidal rule is injected, current phasor is in Space Rotating.Specific method is:Control stator three-phase current IA(t), IB(t), IC(t) It is symmetrical alternating current under stable situation, i.e., each current amplitude is identical, time angular frequency is ωs, phase lags special angle successively.Easily Know, synthesizes stator current vectorIt is rotating space vector, Space Rotating angular frequency is also ωs.Assuming that rotor rotates angular frequency For ωr, each phase resonance frequency of rotor is ω0.Slip frequency is ωfsr
To realize peak torque output, slip (advanced or lag) frequency and rotor resonant frequency basic one can control It causes, i.e. ωf≈ω0,, can be by adjusting institute under conditions of ensureing rotor resonant tank (standard) resonance in part load region Stating difference on the frequency makes rotor current resonance amplification factor be less than peak value amplification factor, and then realizes that exciting current and torque are adjusted.
Since working rotor is under (standard) resonant condition, rotor current vectorSpatially with stator currentTogether Step rotation and close to orthogonal.
Brief analysis is carried out to the resonance alternating current generator of the topological structure below.Such as Fig. 3, wherein ωsFor stator current angle Frequency, ωrFor rotor velocity.The secondary influence factor such as saturation, current harmonics is had ignored in following analysis.
Three-phase symmetrical form stator current can be indicated with following expression:
IA=Acos (ωst)
The Space current vector synthesized at this timeAs shown in figure 3, being represented by:
Each alternate mutual inductance maximum value of rotor is set as Lm, then induction of the stator field of Space Rotating in each phase of rotor Electromotive force can be expressed as:
It is write above-mentioned three-phase induction electromotive force as vector form, isIt should Vector is really vector representation under rotor coordinate, by under the vector median filters to stator coordinate, then forCompare the form of rotor three-phase induced electromotive force and stator current, it can be seen that The space angle difference of rotor induction kinetic potential vector and stator current vector is pi/2.
Stator current frequency is controlled, (ω can be madesr) it is approximately equal to rotor resonant frequencyDue to turning Each circuitry phase of son is the consistent resonance circuit of resonant frequency, and purely resistive is presented in resonant condition, therefore induced electromotive force is as excitation Voltage can motivate the electric current with induced electromotive force with phase in rotor coil.Then, rotor current vector is sweared with stator current The space quadrature of amount is also pi/2.Rotor current differs pi/2 with stator current, can generate stable DC torque.As shown in Figure 3.
Embodiment 2
In the resonance asynchronous machine of the present embodiment, rotor windings are set as two-phase LC resonance winding, be referred to as d, q around Group, two windings are mutual indepedent, mutually orthogonal, and topological structure is as shown in Figure 4.Due to the presence of two winding space differential seat angles, when two Have in winding electric current by when, the Space current vector of variation can be formed.
In the example stator structure and stator current control method with it is consistent in embodiment 1.
The motor electrical characteristic is analyzed below, sees that Fig. 5 is indicated.Saturation, current harmonics are had ignored in following analysis Etc. secondary influence factor.
It is consistent in stator current and embodiment 1, it repeats no more.
Dq coordinate systems are to correspond to respective winding respectively with the fixed coordinate system of rotor, d axis directions and q axis directions.ωrTo turn Rotor speed, ωfSpeed discrepancy for stator current relative to rotor exports operating mode in peak torque, should control ωfWith rotor resonance Frequencies omega0It is identical or close, i.e. stator currentAngular frequencysMeetIn part load region, protecting Under conditions of demonstrate,proving rotor resonant tank (standard) resonance, it can make rotor current resonance amplification factor by adjusting the difference on the frequency Less than peak value amplification factor, and then realize that exciting current and torque are adjusted.
Rotor current vectorWith stator current vectorSynchronous rotary, if it is β with stator current vector differential seat angle.It is fixed Electron current vector is represented byAs shown in Figure 5.
If d axis upper rotor part electric currents are Id, then resonance circuit meet voltage equation be:
If q axis upper rotor part electric currents are Iq, then resonance circuit meet voltage equation be:
And according to resonance characteristicTwo formula on abbreviation can obtain:
The advanced stator current vector angle of rotor current vector can be determined according to rotor current component formTurn Electron current vector is represented by under stator coordinate
To obtain succinct magnetic linkage expression formula and voltage equation, the sr coordinates with the rotation of stator and rotor current vector synchronization are established It is, wherein s axis and stator current vector same phase that advanced 90 degree of s axis, is shown in Fig. 5 on r shaft spaces.
Rotor magnetic linkage is as follows under the coordinate system:
ψS=LsIs
ψR=LmIr
ψs=LmIs
ψr=LrIr
Have when stable state, further writes out voltage equation:
uS=RsIssψR
uRsψS
0RrIrfψs
By steady state voltage equation combination current phasor, voltage and current polar plot can be drawn.And then motor torque can indicate For:
Wherein,It is stator total flux linkage, it is equal with air gap flux linkage and rotor flux under the conditions of ignoring leakage inductance.
Embodiment 3:
Additive excitation circuits/devices are provided in the resonance asynchronous machine of the present embodiment, to improve the output characteristics of motor. In conjunction with rotor there is the design of two quadrature coils to be analyzed.
The present embodiment mainly considers from two angles respectively, when the current forms of two coil of rotor, second is that for above-mentioned Current forms needed for rotor coil determine the control method of rotor-end.
It discusses with reference to the design of non-contact MCR-WPT, the principle of contact is similar.
1) rotor target current equation
There are two coils respectively on setting rotor physics dq axis, as shown in fig. 6, the electric current for setting two coils is respectively:
Id(t)=Ircos(ω0t)
The electric current of two coils can synthesize a current phasor, differential seat angle such as Fig. 6 with rotor d axis.
Rotor is due to rotation, and there are one differential seat angle ω with fixed coordinate systemrT, therefore rotor current vector is in fixed coordinates The lower differential seat angle with stator A axis of system is ωrt+ω0T is represented byIn order to make motor output torque, answer It controls stator current vector and rotor current vector is angled, set electron current here and lag rotor currentSuch as figure Shown in 6, it is expressed as
2) control to rotor target electric current is realized by alternating magnetic field excitation
Because rotor-exciting is realized by resonance circuit, circuit diagram such as Fig. 7.In addition to rotor windings Lr1Itself is outer, secondary Side winding is equivalent to concatenated coil Lr2For receiving dynamic excitation magnetic field, referred to as secondary side ancillary coil, with rotor windings Lr1 Independently of each other and different connecting modes can be taken;For the mode that is connected in series with, capacitance C is added in the looprFor resonance.If The equivalent resistance in circuit is Rr
When primary side applies alternating magnetic field excitation, the total flux linkage of secondary coil institute linkage includes self-induction component and mutual inductance simultaneously Component, respectively ψd2、ψq2
ψd2=MId2+Lr2Id
ψq2=MIq2+Lr2Iq
Wherein, mutual inductances of the M between secondary coil and its primary side excitation coil, Id2And Iq2For encouraging for primary side excitation coil Magnetoelectricity stream, there is determining phase relation each other with meet rotor winding current meet it is above 1) described in relationship.
Meter and stator current IsExcitation effect, rotor windings Lr1The magnetic linkage of linkage is:
ψd1=Lr1Id+LmIssin(ω0t)
ψq1=Lr1Iq-LmIscos(ω0t)
For the rotor including secondary coil and rotor windings resonant tank is per phase, voltage equation is:
Be converted to vector expression:
It is obvious, at this time to make rotor windings be operated in resonant condition, to make loop resonance, in circuit the selection of capacitance want The equivalent inductance for considering secondary coil and rotor windings simultaneously, without should only consider rotor windings inductance.
Under resonant condition, the sum of capacitance both end voltage and the voltage at two inductance both ends are offset, and voltage equation becomes:
0MId20LmIscos(ω0T)=RrId
0MIq20LmIssin(ω0T)=RrIq
It is needed to I in controld、IqIt is controlled.According to above-mentioned voltage equation, it is known that, rotor coil circuit is in resonance In Resistance states.
Electric current I in circuitd、IqDeterminant is:Primary side excitation coil senses the induced electricity on secondary coil in circuit Kinetic potential j ω0MId2, the induced electromotive force ω on rotor windings is acted on stator current0LmIscos(ω0T), after collective effect Result.Therefore when controlling rotor current, can be according to stator current the case where, primary side exciting current is accordingly controlled System realizes the control to rotor current (vector).
Stator voltage equation and current control principle and embodiment 1,2 are almost the same at this time, the difference is that due to turning Sub- additive excitation exists, and stator current can more consider direct torque needs, such as absorbed power factor and torque current ratio Optimal control.
For realizing that the principle of additive excitation and the above situation are almost the same based on the way of contact, the difference is that, by The EMR electromagnetic resonance principle that MCR-WPT is not exclusively relied in the way of contact transmits excitation electric energy, in certain applications, rotor loop Rotor field can also be established under " disresonance " state.But rotor excitation current is still and exchanges at this time, therefore rotor field There are still asynchronous speed difference, work and controls still to follow basic principle of the invention between rotor mechanical separator speed, without It is same as general synchronous electro-magnetic motor, there is entirely different electrical input characteristics and mechanical output characteristics.
We are bright to be combined MCR-WPT technologies with asynchronous machine, innovatively proposes completely new energy converting between mechanical dress It sets and its control method, technically there is the otherness of essence and torque many technological merits that can be infered such as to be accordingly exceedingly fast.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea Technical solution, all should be in the protection domain being defined in the patent claims.

Claims (6)

1. a kind of resonance asynchronous machine, including stator winding and at least two-phase rotor windings, have between each rotor windings determining Space phase,
It is characterized in that, each rotor windings are both provided at least one resonance energy-storage travelling wave tube, and each rotor windings with it is corresponding The electrical connection of resonance energy-storage travelling wave tube constitute resonant tank, the resonant frequency relative error of each resonant tank is less than 50%, Resonance energy-storage travelling wave tube and rotor synchronous rotary;
Further include additive excitation circuit, be electrically connected with the resonant tank, and alternating voltage excitation is applied to resonant tank, swashs The resonant frequency relative error for encouraging electric voltage frequency and resonant tank is less than or equal to 25%.
2. resonance asynchronous machine according to claim 1, which is characterized in that each described including rotor windings described in three-phase Rotor windings are triangular in shape or Y-type layout.
3. resonance asynchronous machine according to claim 1, which is characterized in that the stator winding and rotor windings are configured to Form of straight lines.
4. resonance asynchronous machine according to claim 1, which is characterized in that the additive excitation circuit includes non-contacting Primary coil and secondary coil, the secondary coil and the resonant tank be electrically connected and with rotor windings synchronous rotary, lead to It crosses primary coil and realizes on demand and alternating magnetic field excitation is applied to secondary coil.
5. a kind of control method of resonance asynchronous machine as described in claim 1-4 is any, which is characterized in that this method passes through Control the difference on the frequency between the electric current angular frequency of stator winding and the rotation angular frequency of rotor windings so that each resonant tank works In quasi-resonance state or resonant condition.
6. the control method of resonance asynchronous machine according to claim 5, which is characterized in that be adjusted in synchronism additive excitation electricity Frequency, amplitude and the phase of road driving voltage, before ensureing that each resonant tank works in quasi-resonance state or resonant condition It puts, realizes the adjusting of exciting current and torque.
CN201810054362.7A 2018-01-19 2018-01-19 Resonant asynchronous motor and control method thereof Active CN108390531B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109443398A (en) * 2018-09-29 2019-03-08 同济大学 A kind of motor rotor position detection device
CN109494890A (en) * 2018-11-22 2019-03-19 长沙理工大学 A kind of centreless motor and its control method based on magnetic coupling resonance
CN110022102A (en) * 2019-04-18 2019-07-16 同济大学 A kind of resonant mode power generator

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Publication number Priority date Publication date Assignee Title
CN107104613A (en) * 2017-06-29 2017-08-29 同济大学 A kind of synchronous electric motor rotor exciting method and device

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Publication number Priority date Publication date Assignee Title
CN107104613A (en) * 2017-06-29 2017-08-29 同济大学 A kind of synchronous electric motor rotor exciting method and device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109443398A (en) * 2018-09-29 2019-03-08 同济大学 A kind of motor rotor position detection device
CN109494890A (en) * 2018-11-22 2019-03-19 长沙理工大学 A kind of centreless motor and its control method based on magnetic coupling resonance
CN110022102A (en) * 2019-04-18 2019-07-16 同济大学 A kind of resonant mode power generator

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