CN105896856A - Indirect matrix transformation type multi-phase multi-level permanent magnet motor system and control method thereof - Google Patents
Indirect matrix transformation type multi-phase multi-level permanent magnet motor system and control method thereof Download PDFInfo
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- CN105896856A CN105896856A CN201610248662.XA CN201610248662A CN105896856A CN 105896856 A CN105896856 A CN 105896856A CN 201610248662 A CN201610248662 A CN 201610248662A CN 105896856 A CN105896856 A CN 105896856A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
Abstract
The invention discloses an indirect matrix transformation type multi-phase multi-level permanent magnet motor system. The indirect matrix transformation type multi-phase multi-level permanent magnet motor system includes a double-stator multi-phase composite permanent magnet synchronous motor, wherein two independent five-phase three-level inverters supplies power for stator winding ports of the motor respectively; an independent controllable rectifier supplies power for each five-phase three-level inverter; the two controllable rectifiers can share one set of LC filter at the power grid side; the LC filter includes a three-phase grid-connected inductor and a three-phase filter capacitor which is connected with the three-phase grid-connected inductor in parallel; and the first five-phase three-level inverter and the second five-phase three-level inverter are respectively connected with the two stator winding ports of the double-stator multi-phase composite permanent magnet synchronous motor. The invention also discloses a control method of the indirect matrix transformation type multi-phase multi-level permanent magnet motor system. The indirect matrix transformation type multi-phase multi-level permanent magnet motor system and the control method thereof can significantly improve reliability, power density, torque smoothness and operation efficiency of the motor driving system, and can lay the foundation of solving the technical difficulty that a high capacity motor traction driving system requires compact designs, reliable operation and energy-efficient aspects.
Description
Technical field
The present invention is a kind of novel bimorph transducer multi-phase compound permanent-magnet motor based on multi-phase multi-level matrix converter
Drive system, belongs to the technical field of electrician, motor, power electronics.
Background technology
Currently, capacity, efficiency, power density, reliability requirement are improved constantly by motor driven systems.In early days
Traction drive system mainly uses asynchronous motor.Although asynchronous motor simple in construction, firm and durable, but
Power factor and efficiency are limited.Magneto, due to the advantage in terms of power density and efficiency, is increasingly becoming driving
The development trend of motor.Permanent magnetic synchronous motor structure is simple, volume is little, lightweight, be lost little, efficiency is high.
Switched reluctance machines simple in construction, reliability are high, but its torque ripple is big, armature winding current harmonics is big,
Efficiency is low.Current development is to the safe operation of motor driven systems, compact design, power density, even running
There is higher requirement.
Modern electrical machine system should also have four quadrant running ability, can not only be the energy of decelerating through motor braking procedure
Amount feeds back to electrical network, and needs to ensure good grid-connected current waveform, also to have certain opposing line voltage event
The ability of barrier.Therefore power conversion circuit is another vitals of modern electrical machine traction drive system.Tradition electricity
Machine travel drive system grid side uses diode uncontrollable rectifier device mostly, and this mode not only result in system
Power can only one way flow, it is impossible to by the energy feedback of motor braking process to electrical network, and grid side is electric
Stream harmonic wave is bigger.For the energy discharged during consuming motor braking, consume energy frequently with braking resistor, but this
Sample creates energy dissipation.For energy during efficient recovery motor braking, can be fed back by additional energy
Braking energy is collected in energy-storage units or feeds back in electrical network by circuit.But this mode needs to increase extra
Energy back circuit.The effective measures of another kind of feedback motor braking energy are not control whole with active rectifier replacement
Stream device, i.e. grid side use active rectifier, not only can realize motor braking energy feedback, and improve electricity
Machine system grid connection current harmonics performance.
Summary of the invention
Goal of the invention: in order to meet motor driven systems to aspects such as capacity, efficiency, power density, reliabilities
The requirement improved constantly, still suffers from many key issues and technological challenge at present.In terms of magneto, deposit
Problem be:
(1) install that motor-driven space is limited, motor traction drive system capacity is continuously increased, right
Magneto power density is had higher requirement, it is desirable to Design of PM Motor is compacter.How existing
On Design of PM Motor technical foundation, it is achieved motor space makes full use of, constructs the compactest magneto
Structure becomes the key issue breaking through the restriction of power of motor density.
(2) stability and reliability are had higher requirement by modern electrical machine system, simultaneously motor drivetrain
System capacity constantly increases so that under low voltage power supply environment, power conversion circuit brachium pontis device current stress increases.As
What breaks through traditional three phase electric machine system design bottleneck, and the electric power-feeding structure of research New-type electric machine system is to solve at a high speed
The new challenge of difficult point in motor traction drive.
(3) motor driven systems loads change greatly in running, is therefore regulated greatly by motor-field
Capacity electrical machinery system carries out efficiency optimization and has huge energy-saving benefit.But the neodymium iron boron being widely used at present is forever
Magneto adjustable magnetic is limited in one's ability, and needs adjustable magnetic electric current during adjustable magnetic all the time.Al-Ni-Co permanent magnet is prone to magnetic
Field control, it is achieved that " magnetic field memory ", but its energy density is limited, is unfavorable for high-speed electric expreess locomotive trailer system
Compact design.The most how Nd-Fe-B permanent magnet and Al-Ni-Co permanent magnet are organically combined in motor, and fill
Both advantages are waved in distribution, are the high-speed electric expreess locomotive flux control key issues that realize efficiency optimization.
In terms of four-quadrant electric system power conversion circuit, the problem that presently, there are is:
(1) the two-level inverter output voltage interconversion rate du/dt that motor driven systems is widely used is relatively big,
Motor bearings leakage problem, fragile bearing can be caused, also can cause Contacted EMI in systems.
But multi-electrical level inverter such as neutral point clamp type (NPC) three-level inverter common in using Medium-voltage motor to drive
Switching device quantity will be caused to increase, cost increases.The most how to research and develop the novel how electricity that switching device quantity is few
Flat power conversion circuit is to improve the problem that high-speed electric expreess locomotive traction drive system voltage output characteristics needs solution badly.
(2) the most widely used voltage source inverter or current source inverter all need to depend at dc bus
Rely energy-storage travelling wave tube.Voltage source inverter need to rely on dc-link capacitance, conventional electrolysis electric capacity poor reliability, and
Thin-film capacitor is expensive.The required DC inductance volume relied on of current source inverter is bigger.
(3) existing power conversion circuit breaks down often fault phase place whole piece brachium pontis or whole changer
Passage is removed, and therefore can not effectively play and all perfect power device current capacity.How when fault
By circuit reconfiguration, faults-tolerant control, thus steadily and high reliability service requirement is that power becomes to meet motor torque
Change the difficult point of circuit design.
(4) how designing four-quadrant power conversion circuit makes motor driven systems in grid collapses or interference
Time, effectively suppress power swing, avoid motor torque is impacted, be to meet high-speed electric expreess locomotive reliably, stably
Run another key issue.
Technical scheme: in order to solve an above difficult problem, the present invention proposes techniques below scheme:
A kind of matrixing type multi-phase multi-level permanent magnet motor system indirectly, including:
Bimorph transducer multi-phase compound permanent-magnet synchronous motor, this motor stator winding port is respectively by two five independent phases
Three-level inverter is powered；
Described each five-phase three-level inverter is powered by an independent controlled rectification level respectively；
Two described controlled rectification levels share a set of LC wave filter in grid side；
Described LC wave filter includes three-phase grid inductance and three-phase filter capacitor in parallel therewith, wherein:
One end of described three-phase grid inductance is connected with three-phase filter capacitor, the other end of three-phase grid inductance and three
Phase electrical network is connected, described three-phase filter capacitor midpoint and the clamp diode midpoint of five-phase three-level inverter
It is connected；
Described five-phase three-level inverter includes the first five-phase three-level inverter device and the two or five phase three level
Inverter, described controlled rectification level includes the first controlled rectification level and the second controlled rectification level, wherein:
The first described five-phase three-level inverter and the first controlled rectification level are connected；
The second described five-phase three-level inverter and the second controlled rectification level are connected；
The first described five-phase three-level inverter and the second five-phase three-level inverter are connected respectively to bimorph transducer
Two stator winding ports of multi-phase compound permanent-magnet synchronous motor.
As optimization, described indirect matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system is not
Including dc-link capacitance.
As optimization, described bimorph transducer multi-phase compound permanent-magnet synchronous motor includes inner stator and external stator, and two fixed
Son shares a rotor.
As optimization, described bimorph transducer multi-phase compound permanent-magnet synchronous motor uses and motor torque ripple can be made to diminish
Fractional-slot concentratred winding designs.
As optimization, inner stator and the external stator of described bimorph transducer multi-phase compound permanent-magnet synchronous motor all use heterogeneous
Winding connects.
As optimization, described bimorph transducer multi-phase compound permanent-magnet synchronous motor inner stator and external stator share a rotor,
This rotor uses neodymium iron boron and the composite construction of two kinds of permanent magnets of aluminum nickel cobalt.
A kind of control using indirect matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system
Method, comprises the steps:
1) tach signal ω r and position signalling θ r, the θ of bimorph transducer multi-phase compound permanent-magnet synchronous motor are detected
* r is given instruction rotor position angle；By actual rotor angular position theta r and instruction rotor position angle θ * r ratio
Relatively, by the effect of positioner, output order tach signal ω *；
By the bimorph transducer multi-phase compound permanent-magnet synchronous motor actual speed ω r detected and instruction rotational speed omega * ratio
Relatively, the effect of Negotiation speed controller, export electromagnetic torque command value, simultaneously according to electromagnetic torque equation, can
Obtain q shaft current command value i*q；
2) d axle instruction current i*d=0 is controlled；Detection bimorph transducer multi-phase compound permanent-magnet synchronous motor external stator
With inner stator five phase current is, through 5s/2r coordinate transformation unit, obtain dq coordinate system motor stator
Actual current id and iq；Id and iq is compared with current instruction value i*d and i*q respectively, Jing Guo electricity
The effect of stream controller, exports dq coordinate system motor stator command voltage u*d and u*q；Through 2r/5s
Coordinate transformation unit, becomes the command voltage u* under five phase rest frames by command voltage u*d and u*q；
Voltage with u* as desired output, controls the inverter side of matrix converter so that it is export five phase voltages and act on
In the stator winding of permagnetic synchronous motor；
3) rectification stage of Indirect Matrix Converter uses Space current vector control mode to produce intermediate dc electricity
Pressure, modulation strategy mainly judges the sector at resultant vector place according to the instantaneous value of three-phase voltage, then determine by
Which three fundamental space current vector synthesized reference vector, secondly calculates the effect of three fundamental current space vectors
Time, then determine the on off state that three fundamental current space vectors are corresponding, finally damage according to 3 segmentations, switch
Consume minimum principle and determine the order of three fundamental current space vector effects, and determine every phase according to switching sequence
The time that the on off state of four switching tubes is corresponding with switching point；
4) inverse cascade uses five phase three level Diode-clamped inverters, uses traditional three level space
Voltage vector is modulated, and under rectification stage voltage effect, the neighbouring vectors of reference input current phasor is to inductive switch shape
The output voltage that state produces is two input line voltage U1 and U2, and exports no-voltage under zero vector effect,
The action time of τ 1, τ 2, τ 0 the most corresponding U1, U2, U0.
As optimization, the modulation of described inverse cascade and rectification stage are coordinated control process and are: make in rectification stage no-voltage
Export zero vector with period, and carry out primary space Vector Modulation respectively under rectification stage two-stage line voltage；Inversion
In level action effect, d1, d2, d3, d4, d0 respectively voltage vector V1, V2, V3, V4, V0 accounts for
Empty ratio, V1, V2, V3, V4 are four useful space vectors of synthesising output voltage, and V0 is zero vector, inverse
Become in level action effect, under every grade of rectification stage line voltage, use identical four useful space vector, same effectively
Vector dutycycle under different rectification stage line voltages is identical, on this basis, by the Zero voltage vector of inverter
Distribute at the switching of rectification stage switch, it is possible to achieve the zero current transition of rectification stage switch, and then realize switch
Loss is minimum, vector is symmetrical and neutral point voltage balance.
Beneficial effect: the present invention compared with prior art:
(1) bimorph transducer multi-phase compound permanent-magnet synchronous motor includes inside and outside two stators, shares a rotor.
Two magnetoes are organically combined by this structure, meet the requirement of high-speed electric expreess locomotive compact design.Two stators around
Organize completely isolated, can work independently from each other.Motor torque can be realized by mechanical angle deviation between two stators
Pulsation optimizes.
(2) bimorph transducer multi-phase compound permanent-magnet synchronous motor uses the design of fractional-slot concentratred winding, motor torque arteries and veins
Dynamic little.Winding span is little, and winding length is short, and winding is separate, and reliability is high.
(3) bimorph transducer of bimorph transducer multi-phase compound permanent-magnet synchronous motor all uses polyphase windings to connect, can be effective
Improve the three phase electric machine problem at aspects such as torque pulsation, fault-tolerant operation, single phase power supply bridge arm current stress.
(4) Nd-Fe-B permanent magnet of bimorph transducer multi-phase compound permanent-magnet synchronous motor and Al-Ni-Co permanent magnet are at rotor
Upper organic composite, not only has the advantage that Al-Ni-Co permanent magnet magnetic field easily regulates, and remains ferro-aluminum boron energy
The feature that density is high.Rotor composite permanent magnet can be magnetized by bimorph transducer winding jointly, and the efficiency that magnetizes is high.
(5) on indirect matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system dc bus
Without energy-storage travelling wave tube, i.e. without dc-link capacitance.Owing to general electrochemical capacitor reliability is poor, and thin-film electro
Hold expensive.The most this matrix type transducer reliability without dc-link capacitance is higher.
(6) matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system can at motor side indirectly
To produce three-level AC stream output voltage, harmonic performance is good, voltage change ratio du/dt is low, relatively conventional directly
Formula matrix converter, indirect matrix converter topological structure is simple, without dc-link capacitance, commutation mode safety,
It is applicable to all kinds of electric power system.
(7) matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system grid side uses indirectly
Double-channel active commutator, can successfully manage electrical network interference by energy feedback during motor braking to electrical network
The power swing caused, it is ensured that grid side has good grid-connected current waveform.
(8) indirect matrix converter that the present invention proposes modulation strategy in the case of electrical network abnormal input can
Reply voltage distortion, the situation such as falls, and can strengthen the ability of system reply voltage failure, improve output wave form quality
Amount.
(9) indirect matrix converter that the present invention proposes is made up of double-channel active commutator in grid side, energy
Improve grid side rectifier power grade, reduce the current stress of single power device.Rectifier fault can be tackled
In the case of, the fault-tolerant ability under particularly power device short circuit, open circuit conditions, improving integrally-built safety can
By property.
As can be seen here, bimorph transducer based on multi-phase multi-level matrix converter proposed by the invention is heterogeneous to be combined forever
Magneto system is creatively by permagnetic synchronous motor, Double-stator motor, polyphase machine, aluminum nickel cobalt adjustable magnetic characteristic
Organic integration, in one, and proposes multi-phase multi-level matrix converter, and can significantly improve motor driven systems can
By property, power density, Torque Ripple and operational efficiency, and exist for solving large-size machine traction drive system
Compact design, reliability service, the technological difficulties of energy-efficient aspect lay the foundation.
Accompanying drawing explanation
Fig. 1 is the extremely double-deck concentratred winding composite permanet magnet type electricity of bimorph transducer ten phase 30 groove 24 that the present invention proposes
Machine structural representation；
Wherein, 11-external stator, 15-inner stator, 12-rotor, 13-Nd-Fe-B permanent magnet, 14-aluminum nickel cobalt is forever
Magnet
Fig. 2 is the bimorph transducer ten two-phase 24 groove 22 pole monolayer concentratred winding composite permanet magnet type that the present invention proposes
Electric machine structure schematic diagram；
Fig. 3 is the multi-phase multi-level matrix converter schematic diagram that the present invention proposes；
Wherein, 31-three-phase grid inductance, 32-three-phase filter capacitor, 34-two-way switch, each two-way opened of 33-
Close by the IGBT device series arm of two band anti-paralleled diodes, 36-IGBT, 37-series diode, 35-
Clamp diode midpoint, 38-three-phase filter capacitor midpoint
Fig. 4 is controlled rectification level of the present invention and five-phase three-level inverter vector sequential action figure；
Wherein, 41-rectification stage vector sequence of operation, 42-does not coordinates the inverse cascade vector precedence diagram controlled, 43-
The vector sequential action figure of inverse cascade after coordinating to control
Fig. 5 is the present invention indirect matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system
Control block diagram.
Wherein, 51-voltage sampling circuit, 52-rectification stage space vector pulse generator, 53-rectification stage circuit,
54-five phase tri-level inversion level circuit, 55-bimorph transducer multiphase compound motor, 56-inverse cascade space vector produces
Device, 57-2r/5s coordinate transformation unit, 58-current controller, 59-rotational speed governor, 510-position control
Device, 511-5s/2r coordinate transformation unit, 512-rotation speed measurement unit, 513-outer corner measurement unit
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment, it is further elucidated with the present invention, it should be understood that these embodiments are only used for
The present invention is described rather than limits the scope of the present invention, after having read the present invention, those skilled in the art
Amendment to the various equivalent form of values of the present invention all falls within the application claims limited range.
A kind of way of realization of the bimorph transducer multi-phase compound permanent-magnet synchronous motor that the present invention proposes as shown in Figure 1, i.e.
The extremely double-deck concentratred winding composite permanet magnet type electric machine structure schematic diagram of bimorph transducer ten phase 30 groove 24, at external stator
11 and inner stator 15 on be respectively disposed with five phase winding A, B, C, D, E.External stator and inner stator share and turn
Son 12, embeds Nd-Fe-B permanent magnet 13 and Al-Ni-Co permanent magnet 14 on rotor.Both magnetic circuits are also
Connection, respectively via inside and outside stator, and another forms closed magnetic circuit to permanent magnet.Inner stator 15 and external stator
Winding on 11 can produce torque current and permanent magnet fills demagnetizing current, can control air-gap field neatly
Intensity.Motor uses concentrates Double Layer Winding structure, and winding span is short, and reliability is high.
The another kind of way of realization of the bimorph transducer multi-phase compound permanent-magnet synchronous motor that the present invention proposes as shown in Figure 2,
I.e. bimorph transducer ten two-phase 24 groove 22 pole monolayer concentratred winding composite permanet magnet type electric machine structure schematic diagram, fixed outside
It is respectively disposed with six phase winding A, B, C, D, E, F on son 11 and inner stator 15.External stator and inner stator
Share rotor 12, rotor embeds Nd-Fe-B permanent magnet 13 and Al-Ni-Co permanent magnet 14.Both permanent magnets
Magnetic circuit is connected, and forms closed magnetic circuit via inside and outside stator respectively.Winding on inner stator 15 and external stator 11
Torque current can be produced and permanent magnet fills demagnetizing current, air-gap field intensity can be adjusted neatly.Motor is adopted
With concentrating Double Layer Winding structure, winding span is short, and reliability is high.
Say as a example by the bimorph transducer multi-phase compound permanent-magnet electric system of the multi-phase multi-level matrix converter shown in Fig. 3
Bright.Grid side input voltage is three-phase alternating voltage, and system nominal voltage is 380V, and rated power is 10KW.
As it is shown on figure 3, grid side voltage is connected with electric capacity 32 by inductance 31, then accesses and connect rectification
Device, commutator is had two-way resistance by one in series of an IGBT33 cascode level of two band backward diodes
Disconnected voltage capability and the two-way switch 34 of bidirectional current negotiability, constitute a phase brachium pontis of rectification stage module,
Three brachium pontis constitute a rectifier module.Commutator output is directly connected to diode-clamped five phase three level
Inverter dc bus, wherein the 2nd IGBT36 of 4 band anti-paralleled diodes five phase three level in series
One group of brachium pontis of inverter, two series diodes 37 and middle two IGBT composition in parallel clamp circuit, 5
Group brachium pontis constitutes a five-phase three-level inverter, clamp diode midpoint 35 and grid side electric capacity midpoint 38
It is connected.Two stators of bimorph transducer multi-phase compound permanent-magnet motor are driven respectively by two five-phase three-level inverters
On five phase windings.
As shown in Figure 4, grid side rectification module is according to voltage utilization flexible, and main employing rectification stage has
Zero vector is modulated, i.e. space current modulation method.When the rectification stage one upper and lower switch conduction of phase brachium pontis, another biphase brachium pontis
Switch fully closed disconnected time, input current vector is zero vector, now rectification stage output DC voltage is zero.Modulation plan
Slightly mainly judge the sector at resultant vector place according to the instantaneous value of three-phase voltage, then determine by any three bases
This space current vector synthesized reference vector, secondly calculates the action time of three fundamental current space vectors, then
Determine the on off state that three fundamental current space vectors are corresponding, finally minimum according to 3 segmentations, switching loss,
Symmetrical principle determines the order of three fundamental current space vector effects, and determines often according to switching sequence
The time that the on off state of four switching tubes is corresponding with switching point mutually.In actual applications, due to by dissimilar
The impact of load, line voltage can present various types of disturbance, as distorted, falling.Therefore, to indirectly
Formula Matrix Converter with Space Vector Modulated Control Strategy improves, and proposes a kind of abnormal input voltage modulated method,
The output waveform quality of indirect matrix converter is improved by introducing anti-interference component in rectification modulation vector.Will
The improper factors such as the unsymmetry of input voltage and distortion are considered as input disturbance, and input disturbance is expressed as phase
Linear deviation to input voltage positive sequence fundametal compoment.According to Fourier transform principle, input voltage is decomposed into
Fundametal compoment and the offset component two parts actually entered between voltage and reference input fundamental positive sequence voltage.When defeated
When entering Voltage unbalance, will realize the input power without harmonic wave, input current vector should contain harmonic component, accordingly
Ground rectification modulation vector also should contain harmonic component.
Inverse cascade uses five phase three level Diode-clamped inverters, uses traditional three level space voltages
Vector Modulation.In 41 rectification stage voltage action effects, the neighbouring vectors correspondence of reference input current phasor is opened
The output voltage that off status produces is respectively input line voltage UabAnd Uac, and under zero vector effect, export zero electricity
Pressure.τab、τac、τ0The most corresponding Uab、Uac、U0Action time.Owing to DC voltage is PWM voltage,
Therefore the modulation of inverse cascade to be coordinated to carry out, in inverse cascade 42 voltage action effect, in rectification with rectification stage
Export zero vector during level no-voltage effect, and carry out primary space vector respectively under rectification stage two-stage line voltage
Modulation.In inverse cascade 42 voltage action effect, d1、d2、d3、d4、d0It is respectively voltage vector V1、V2、
V3、V4、V0Dutycycle, V1、V2、V3、V4For four useful space vectors of synthesising output voltage, V0For
Zero vector.In inverse cascade 42 voltage action effect, under every grade of rectification stage line voltage, identical four are used to have
Effect space vector, same effective vector dutycycle under different rectification stage line voltages is identical.Improving inverse cascade
In 43 voltage action effects, if the Zero voltage vector of inverter is distributed at the switching of rectification stage switch,
The zero current transition of rectification stage switch can be realized.In improving inverse cascade 43 voltage action effect, by adjusting
Inversion level vector sequence of operation, it is achieved switching loss is minimum, vector is symmetrical and neutral point voltage balance.?
On the basis of this, rectification stage and inverse cascade all use traditional dead zone function to ensure Safe commutation.
Fig. 5 is bimorph transducer multi-phase compound permanent-magnet electric system control block diagram based on multi-phase multi-level matrix converter.
In this control system, heterogeneous by the rectification stage 53 of multi-phase multi-level matrixing, inverse cascade 54, bimorph transducer
Composite magnetoelectric machine 55, voltage sampling circuit 51, current controller 58, rotational speed governor 59, position control
The part such as device 510,2r/5s coordinate transformation unit 57 and 5s/2r coordinate transformation unit 511 is constituted.
The control process of this control system is: the rotating speed letter of detection bimorph transducer multi-phase compound permanent-magnet synchronous motor 313
Number ωrWith position signalling θr, θ* rFor given instruction rotor position angle；By actual rotor angular position thetarWith
Instruction rotor position angle θ* rRelatively, by the effect of positioner 510, output order tach signal ω*；
Motor actual speed ω that will detectrWith instruction rotational speed omega*Relatively, the effect of Negotiation speed controller 59,
Output electromagnetic torque command value, simultaneously according to electromagnetic torque equation, available q shaft current command value i* q,
And control d axle instruction current i* d=0；Detection motor stator five phase current is, become through 5s/2r coordinate
Change unit 511, obtain dq coordinate system motor stator actual current idAnd iq；By idAnd iqRespectively with electricity
Stream command value i* dAnd i* qRelatively, through the effect of overcurrent controller, output dq coordinate system motor stator instruction
Voltage u* dAnd u* q；Through 2r/5s coordinate transformation unit 57, by command voltage u* dAnd u* qBecome five phases
Command voltage u under rest frame*；With u*For the voltage of desired output, control the inversion of matrix converter
Side so that it is in exporting five phase voltages and acting on the stator winding of permagnetic synchronous motor 55；Indirect type square simultaneously
The rectification stage 53 of battle array changer uses Space current vector control mode to produce middle dc voltage, and by direct current
Instantaneous voltage exports to inverter side in order to revise the index of modulation.This completes based on multi-phase multi-level matrix
The control system of the bimorph transducer composite magnetoelectric machine of changer.
Claims (8)
1. an indirect matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system, it is characterised in that bag
Include:
Bimorph transducer multi-phase compound permanent-magnet synchronous motor (313), this motor stator winding port is respectively by two five independent phases three
Electrical level inverter is powered；
Described each five-phase three-level inverter is powered by an independent controlled rectification level respectively；
Two described controlled rectification levels share a set of LC wave filter in grid side；
Described LC wave filter includes three-phase grid inductance (31) and three-phase filter capacitor (32) in parallel therewith, wherein:
One end of described three-phase grid inductance (31) is connected with three-phase filter capacitor (32), three-phase grid inductance (31)
The other end is connected with three phase network, described three-phase filter capacitor midpoint (38) and the clamp two of five-phase three-level inverter
Pipe midpoint, pole (35) is connected；
Described five-phase three-level inverter includes that the first five-phase three-level inverter device (311) and the two or five phase three level are inverse
Becoming device (312), described controlled rectification level includes the first controlled rectification level (39) and the second controlled rectification level (310), wherein:
Described the first five-phase three-level inverter (311) is connected with the first controlled rectification level (39)；
Described the second five-phase three-level inverter (312) is connected with the second controlled rectification level (310)；
Described the first five-phase three-level inverter (311), the second five-phase three-level inverter (312), the first controlled rectification
Level (39) and the second controlled rectification level (310) collectively form indirect matrix converter.
Described the first five-phase three-level inverter (311) and the second five-phase three-level inverter (312) are connected respectively to double fixed
Two stator winding ports of sub-multi-phase compound permanent-magnet synchronous motor (313).
Indirect matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system the most according to claim 1,
It is characterized in that: described indirect matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system does not include direct current
Bus capacitor.
3. matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system indirectly as claimed in claim 1,
It is characterized in that: described bimorph transducer multi-phase compound permanent-magnet synchronous motor (313) includes inner stator and external stator, two stators
Share a rotor.
4. matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system indirectly as claimed in claim 1,
It is characterized in that: described bimorph transducer multi-phase compound permanent-magnet synchronous motor (313) use can make that motor torque ripple diminishes point
Number groove concentratred winding design.
5. matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system indirectly as claimed in claim 1,
It is characterized in that: the inner stator of described bimorph transducer multi-phase compound permanent-magnet synchronous motor (313) and external stator all use heterogeneous around
Group connects.
6. matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet electric system indirectly as claimed in claim 1,
It is characterized in that: described bimorph transducer multi-phase compound permanent-magnet synchronous motor (313) inner stator and external stator share a rotor,
This rotor uses neodymium iron boron and the composite construction of two kinds of permanent magnets of aluminum nickel cobalt.
7. one kind uses matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet indirectly as claimed in claim 1
The control method of electric system, it is characterised in that comprise the steps:
1) the tach signal ω r and position signalling θ r of detection bimorph transducer multi-phase compound permanent-magnet synchronous motor (313), θ * r
For given instruction rotor position angle；Actual rotor angular position theta r and instruction rotor position angle θ * r is compared, by position
Put the effect of controller (510), output order tach signal ω *；
Bimorph transducer multi-phase compound permanent-magnet synchronous motor (313) the actual speed ω r detected and instruction rotational speed omega * are compared,
The effect of Negotiation speed controller (59), exports electromagnetic torque command value, simultaneously according to electromagnetic torque equation, available
Q shaft current command value i*q；
2) d axle instruction current i*d=0 is controlled；Detection bimorph transducer multi-phase compound permanent-magnet synchronous motor (313) external stator and
Inner stator five phase current is, through 5s/2r coordinate transformation unit (511), obtains dq coordinate system motor stator actual
Electric current id and iq；Id and iq is compared with current instruction value i*d and i*q respectively, through the work of overcurrent controller
With, export dq coordinate system motor stator command voltage u*d and u*q；Through 2r/5s coordinate transformation unit (57),
Command voltage u*d and u*q is become the command voltage u* under five phase rest frames；Electricity with u* as desired output
Pressure, controls the inverter side of matrix converter so that it is export five phase voltages and act on the stator of permagnetic synchronous motor (55)
In winding；
3) the first controlled rectification level (39) and the second controlled rectification level (310) use Space current vector control mode to produce
Middle dc voltage, modulation strategy mainly judges the sector at resultant vector place according to the instantaneous value of three-phase voltage, more really
Fixed by any three fundamental space current vector synthesized reference vectors, when secondly calculating the effect of three fundamental current space vectors
Between, then determine the on off state that three fundamental current space vectors are corresponding, finally minimum according to 3 segmentations, switching loss
Principle determines the order of three fundamental current space vector effects, and determines opening of every four switching tubes mutually according to switching sequence
The time that off status is corresponding with switching point；
4) the first five-phase three-level inverter device (311) and the second five-phase three-level inverter (312) use five phases three
Level Diode-clamped inverter, uses traditional three level space voltage vector modulation, under rectification stage voltage effect,
The output voltage that the neighbouring vectors correspondence on off state of reference input current phasor produces is two input line voltage U1 and U2,
And under zero vector effect, export no-voltage, the action time of τ 1, τ 2, τ 0 the most corresponding U1, U2, U0.
Indirect matrixing type multi-phase multi-level bimorph transducer multi-phase compound permanent-magnet department of electrical engineering the most according to claim 7
The control method of system, it is characterised in that the modulation of described inverse cascade and rectification stage are coordinated control process and be: at rectification stage zero
Export zero vector during voltage effect, and carry out primary space Vector Modulation respectively under rectification stage two-stage line voltage；Inversion
In level action effect, d1, d2, d3, d4, d0 are respectively the dutycycle of voltage vector V1, V2, V3, V4, V0,
V1, V2, V3, V4 are four useful space vectors of synthesising output voltage, and V0 is zero vector, inverse cascade action effect
In, using identical four useful space vector under every grade of rectification stage line voltage, same effective vector is at different rectification stage lines
Dutycycle under voltage is identical, on this basis, is distributed by the Zero voltage vector of inverter at the switching of rectification stage switch,
Can realize the zero current transition of rectification stage switch, and then realize that switching loss is minimum, vector is symmetrical and mid-point voltage
Balance.
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