CN109412447A - A kind of phase shift type three-phase high frequency chain matrix inverter topological structure and modulator approach - Google Patents
A kind of phase shift type three-phase high frequency chain matrix inverter topological structure and modulator approach Download PDFInfo
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- CN109412447A CN109412447A CN201811433103.1A CN201811433103A CN109412447A CN 109412447 A CN109412447 A CN 109412447A CN 201811433103 A CN201811433103 A CN 201811433103A CN 109412447 A CN109412447 A CN 109412447A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of phase shift type three-phase high frequency chain matrix inverter topological structure and modulator approach, the phase shift type three-phase high frequency chain matrix inverter topology is sequentially connected and is constituted by full-bridge inverter, transformer T, matrix converter, LC mode filter；The topological structure inhibits voltage oscillation and due to voltage spikes by introducing two clamp diodes and resonant inductance；The difference of used uni-polarity phase-shifted control strategy and traditional phase shifting control is that the phase shifting angle of uni-polarity phase-shifted control strategy is continually changing, the matrix converter of transformer rear class can be decoupled into two common voltage type inverters and be controlled, under coupling unipolarity phase shift modulation method of unhitching, the zero voltage switch of all controlled tr tubes in topology may be implemented, switching tube loss can be reduced, improve the efficiency of converter.The present invention has many advantages, such as that power conversion grade is few, control method is simple, circuit stability is high.
Description
Technical field
The present invention relates to electronic power converter topology and modulation field, especially a kind of phase shift type three-phase High Frequency Links
Matrix inverter topological structure and modulator approach.
Background technique
Inverter is a kind of topology apparatus for direct current energy being converted into AC energy.High-frequency chain inverter uses transformer
Substitution Industrial Frequency Transformer overcomes the disadvantages of traditional transformer volume is big, noise is big, at high cost.High frequency chain matrix inverter
Conversion process has tri- kinds of power features of DC/HFAC/LFAC, wherein HFAC: high-frequency ac, LFAC: low-frequency ac.It knows such
Occurs DC/AC i.e. DC/AC inversion link in inverter, which is located at transformer primary side, and AC/AC occurs and hand over
Stream/exchange conversion link, the link are also commonly referred to as matrix converter link, are located at transformer secondary.Matrix converter and tradition
Converter is compared, and does not have intermediate energy storage link, and using two-way switch, the two-way flow of energy, compact-sized, volume may be implemented
It is small, high-efficient, and output voltage amplitude and frequency can be with independent controls.
Due to the presence of transformer leakage inductance, when the high frequency chain matrix inverter change of current, in transformer secondary matrix converter
Power tube on generate biggish voltage overshoot, therefore the Safe commutation of transformer secondary matrix converter is always to restrict high frequency
Chain inverter realizes the technological difficulties promoted on a large scale.It is mainly the following Safe commutation strategy at present: 1. having by being added
Source clamps to inhibit voltage overshoot, Sofe Switch may be implemented, but the clamp circuit introduced increases cost, increased controlled power
Pipe also makes to control increasingly complex；2. unipolarity and bi-polarity phase-shifted control strategy are realized by the commutation overlap of matrix converter
The nature commutation of inductive current, and realize the ZVS of power tube, but there are the commutation overlap time it is not easy to control the problems such as；③
Series resonant circuit is introduced to realize the soft commutation of power tube in preceding-stage inversion device, and power tube switching is required to occur in zero electricity at this time
It flows the moment, and controls output energy demand and judge resonance working condition, so that control mode is complicated.
Although causing the modulation of inverter and control increasingly complex however, above-mentioned strategy can be realized Safe commutation, leading
System reliability is caused to be lowered so that the popularization and use for affecting the quasi-converter.
Summary of the invention
In view of the above technical problems, the purpose of the present invention is to provide a kind of phase shift type three-phase high frequency chain matrix inverters
Topological structure and modulator approach.Power conversion grade of the present invention is few, modulation is simple, and unhitches with voltage-type that combine realization single for coupling
Polarity prime phase shift modulation method.
To achieve the above object, the present invention is realized according to following technical scheme:
A kind of phase shift type three-phase high frequency chain matrix inverter topological structure of the invention, which is characterized in that including full-bridge
Inverter, transformer T, matrix converter, LC mode filter, each component are sequentially connected composition；
Wherein, the full-bridge inverter is by DC input voitage Ui, controlled tr tube S1, controlled tr tube S2, controllable switch
Pipe S3, controlled tr tube S4, diode DC1, diode DC2, inductance LrComposition；
The matrix converter is by controlled tr tube S1a, controlled tr tube S4b, controlled tr tube S4a, controlled tr tube S1b、
Controlled tr tube S3a, controlled tr tube S6b, controlled tr tube S6a, controlled tr tube S3b, controlled tr tube S5a, controlled tr tube
S2b, controlled tr tube S2a, controlled tr tube S5bComposition；
The LC mode filter is by the first inductance Lf1, the second inductance Lf2, third inductance Lf3, first capacitor Cf1, the second capacitor
Cf2, third capacitor Cf3, load R1, load R2, load R3Composition；
The DC input voitage UiAnode respectively with controlled tr tube S1Collector, diode DC1Anode, can
Control switching tube S3Collector be connected, the DC input voitage UiCathode respectively with controlled tr tube S2Emitter, two poles
Pipe DC2Cathode, controlled tr tube S4Emitter be connected；
Controlled tr tube S1Emitter respectively with inductance LrOne end, controlled tr tube S2Collector be connected；Controllably open
Close pipe S3Emitter respectively with transformer T primary side one end, controlled tr tube S4Collector be connected, inductance LrThe other end point
Not with diode DC1Cathode, diode DC2Anode, transformer T primary side the other end be connected；
The one end on transformer T pair side respectively with controlled tr tube S1aCollector, controlled tr tube S3aCollector, can
Control switching tube S5aCollector be connected, the other end on transformer T pair side respectively with controlled tr tube S1bCollector, controllably open
Close pipe S3bCollector, controlled tr tube S5bCollector be connected；Controlled tr tube S1aEmitter and controlled tr tube S4b's
Emitter is connected, controlled tr tube S3aEmitter and controlled tr tube S6bEmitter be connected, controlled tr tube S5aTransmitting
Pole and controlled tr tube S2bEmitter be connected；Controlled tr tube S1bEmitter and controlled tr tube S4aEmitter be connected,
Controlled tr tube S3bEmitter and controlled tr tube S6aEmitter be connected, controlled tr tube S5bEmitter with controllably open
Close pipe S2aEmitter be connected；
Controlled tr tube S4aCollector and controlled tr tube S4bCollector be connected after with the first inductance Lf1One end phase
Even, the first inductance Lf1The other end and first capacitor Cf1One end, load R1One end is connected, and loads R1The other end respectively with load R2、
Load R3It is connected；First capacitor Cf1The other end respectively with the second capacitor Cf2, third capacitor Cf3, load R1, load R2, load R3Phase
Even；
Controlled tr tube S6aCollector and controlled tr tube S6bCollector be connected after with the second inductance Lf2One end phase
Even, the second inductance Lf2The other end and the second capacitor Cf2, load R2One end is connected, and loads R2The other end respectively with load R1, load R3
It is connected；Second capacitor Cf2The other end respectively with first capacitor Cf1, third capacitor Cf3, load R1, load R2, load R3It is connected；
Controlled tr tube S2aCollector and controlled tr tube S2bCollector be connected after and third inductance Lf3One end phase
Even, third inductance Lf3The other end and third capacitor Cf3, load R3One end is connected, and loads R3The other end respectively with load R1, load R2
It is connected；Third capacitor Cf3The other end respectively with first capacitor Cf1, the second capacitor Cf2, load R1, load R2, load R3It is connected.
A kind of tune modulated according to above-mentioned phase shift type three-phase high frequency chain matrix inverter topological structure proposed by the present invention
Method processed, it is characterised in that: phase shift type matrix inverter is controlled using the PWM of change in duty cycle, the controlled tr tube S1、
Controlled tr tube S4The bridge arm and controlled tr tube S of composition2, controlled tr tube S3The bridge arm alternate conduction of composition；Series resonance electricity
The zero voltage switch of switching tube is realized in sense；The voltage of the primary side of transformer T and two clamp diode connected ends is clamped two poles
Pipe wrench position is in 0 and UiBetween；The matrix converter of transformer T rear class is equivalent to two groups of common voltage source inverters and unhitches
Coupling control, unhitches coupling logic modulation circuit to controlled tr tube S according to voltage-type1a~controlled tr tube S6a, controlled tr tube S1b
~controlled tr tube S6bIt is controlled, the high-frequency resonant electric current that transformer T is exported converts low frequency pulsating electric current.
Further, it is continually changing using the angle θ of the uni-polarity phase-shifted control in duty ratio, is m's in modulation degree
In the case of, wherein o < m < 1, variation range are 2 180 ° < θ < 180 ° (1-m)；In a switch periods TsIn time, switching tube S1With
S4、S2With S3Common turn-on time are as follows: Tcom=Ts(180°-θ)/360°。
Further, the matrix converter of transformer T rear class is unhitched coupling control using voltage-type, and matrix converter is switched
Pipe resolves into positive and negative two groups, i.e. controlled tr tube S1a∽S6aWith controlled tr tube S1b∽S6b, opened for negative group when positive group switching tube works
It is all turned on for positive group when closing pipe to all turn on, and bearing group switching tube work, rear class matrix converter is equivalent at two groups of common currents
Type inverter.
Compared with the prior art, the invention has the following advantages:
The application of resonant inductance of the invention makes transformer primary side power switch tube realize zero voltage switch, introduces two pincers
Position diode can inhibit the voltage oscillation and due to voltage spikes of transformer secondary switching tube, reduce in this way because interrupting transformer leakage
The very high due to voltage spikes that the circulation path of sense and filter inductance electric current can generate at switching tube both ends, and inhibit because of transformer
Series resonance occurs for leakage inductance and the parasitic capacitance of switching tube, so that the loss of switch reduces, improves circuit reliability and efficiency.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is inverter circuit topology structural schematic diagram of the present invention；
Fig. 2 is inverter working condition principle waveform diagram in a high frequency period of the invention；
Fig. 3 is that transformer secondary matrix converter unhitches coupling schematic diagram in voltage-type；
Fig. 4 (a)-Fig. 4 (l) is in one high frequency period of prime phase shift type three-phase high frequency chain matrix inverter of the present invention
Mode circuit diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
As shown in Figure 1, inverter topology of the invention includes full-bridge inverter, transformer T, matrix converter, LC
Mode filter, each component are sequentially connected composition；
Full-bridge inverter is by DC input voitage Ui, controlled tr tube S1, controlled tr tube S2, controlled tr tube S3, it is controllable
Switching tube S4, diode DC2, diode DC2, inductance LrComposition；
Matrix converter is by controlled tr tube S1a, controlled tr tube S4b, controlled tr tube S4a, controlled tr tube S1b, it is controllable
Switching tube S3a, controlled tr tube S6b, controlled tr tube S6a, controlled tr tube S3b, controlled tr tube S5a, controlled tr tube S2b、
Controlled tr tube S2a, controlled tr tube S5bComposition；
LC mode filter is by the first inductance Lf1, the second inductance Lf2, third inductance Lf3, first capacitor Cf1, the second capacitor Cf2、
Third capacitor Cf3, load R1, load R2, load R3Composition；
DC input voitage UiAnode respectively with controlled tr tube S1Collector, diode DC1It is positive, controllably open
Close pipe S3Collector be connected, DC input voitage UiCathode respectively with controlled tr tube S2Emitter, diode DC2It is negative
Pole, controlled tr tube S4Emitter be connected；
Controlled tr tube S1Emitter respectively with inductance LrOne end, controlled tr tube S2Collector be connected；Controllably open
Close pipe S3Emitter respectively with transformer T primary side one end, controlled tr tube S4Collector be connected；Inductance LrThe other end with
Diode DC1Cathode, diode DC2Anode, transformer T primary side one end be connected；
The one end on transformer T pair side respectively with controlled tr tube S1aCollector, controlled tr tube S3aCollector, can
Control switching tube S5aCollector be connected, the other end on transformer T pair side respectively with controlled tr tube S1bCollector, controllably open
Close pipe S3bCollector, controlled tr tube S5bCollector be connected；Controlled tr tube S1aEmitter and controlled tr tube S4b's
Emitter is connected, controlled tr tube S3aEmitter and controlled tr tube S6bEmitter be connected, controlled tr tube S5aTransmitting
Pole and controlled tr tube S2bEmitter be connected；Controlled tr tube S1bEmitter and controlled tr tube S4aEmitter be connected,
Controlled tr tube S3bEmitter and controlled tr tube S6aEmitter be connected, controlled tr tube S5bEmitter with controllably open
Close pipe S2aEmitter be connected；
Controlled tr tube S4aCollector and controlled tr tube S4bCollector be connected after respectively with the first inductance Lf1One end
It is connected, the first inductance Lf1The other end and first capacitor Cf1One end, load R1One end is connected, and loads R1The other end respectively with load
R2, load R3It is connected；First capacitor Cf1The other end respectively with the second capacitor Cf2, third capacitor Cf3, load R1, load R2, load R3
It is connected；
Controlled tr tube S6aCollector and controlled tr tube S6bCollector be connected after respectively with the second inductance Lf2One end
It is connected, the second inductance Lf2The other end and the second capacitor Cf2, load R2One end is connected；Load R2The other end respectively with load R1, it is negative
Carry R3It is connected；Second capacitor Cf2The other end respectively with first capacitor Cf1, third capacitor Cf3, load R1, load R2, load R3Phase
Even；
Controlled tr tube S2aCollector and controlled tr tube S2bCollector be connected after respectively with third inductance Lf3One end
It is connected, third inductance Lf3The other end and third capacitor Cf3, load R3One end is connected, and loads R3The other end respectively with load R1, it is negative
Carry R2It is connected；Third capacitor Cf3The other end respectively with first capacitor Cf1, the second capacitor Cf2, load R1, load R2, load R3Phase
Even.
Transformer preceding stage high frequency inverter of the present invention adds clamp diode and resonant inductance, using the PWM of certain duty ratio
Control method makes preceding and inverter right bridge arm driving signal S4(S3) relative to left bridge arm driving signal S1(S2) there are phase shifts
Angle θ.The matrix converter of transformer rear class is unhitched the modulator approach that coupling combines using PWM with voltage-type, and transformer is exported
High-frequency ac current be converted into power current.
A kind of tune modulated using above-mentioned phase shift type three-phase high frequency chain matrix inverter topological structure proposed by the present invention
Method processed, comprising: phase shift type matrix inverter is controlled using the PWM of change in duty cycle, the controlled tr tube S1, controllably open
Close pipe S4The bridge arm and controlled tr tube S of composition2, controlled tr tube S3The bridge arm alternate conduction of composition；Series resonance inductor is realized
The zero voltage switch of switching tube；The voltage of the primary side of transformer T and two clamp diode connected ends is clamped diode clamp
In 0 and UiBetween；The matrix converter of transformer T rear class is equivalent to two groups of common voltage source inverters and carries out coupling control of unhitching
System unhitches coupling logic modulation circuit to controlled tr tube S according to voltage-type1a~controlled tr tube S6a, controlled tr tube S1b~can
Control switching tube S6bIt is controlled, the high-frequency resonant electric current that transformer T is exported converts low frequency pulsating electric current.
The angle θ of the uni-polarity phase-shifted control of duty ratio be it is continually changing, modulation degree be m in the case where, wherein o < m <
1, variation range is 2 180 ° < θ < 180 ° (1-m)；In a switch periods TsIn time, switching tube S1With S4、S2With S3It is common
Turn-on time are as follows: Tcom=Ts(180°-θ)/360°。
The matrix converter of transformer T rear class is unhitched coupling control using voltage-type, and matrix converter switching tube is resolved into
Positive and negative two groups, i.e. controlled tr tube S1a∽S6aWith controlled tr tube S1b∽S6b, negative group of switching tube is whole when positive group switching tube works
Conducting, and bear and all turned on for positive group when group switching tube works, rear class matrix converter is equivalent at two groups of common voltage type inverters.
Fig. 2 is working condition principle waveform diagram in a high frequency period of the invention.S in figure1、S4And S2、S3Before transformer
The driving signal of grade high-frequency inverter power tube, S1a∽S6a、S1b∽S6bFor the drive of transformer rear class matrix converter power tube
Dynamic signal.ipThe current waveform of transformer primary side, iDC1、iDC2To flow through diode DC1、DC2Electric current.As seen from Figure 2, preceding
The duty ratio of grade driving signal of power switching tube is variation；Simultaneously it can be seen that in the topology a cycle, diode DC1、
DC2Each conducting is primary, and the voltage of clamper transformer primary side, transformer primary side input voltage is zero, and it is positive and negative to provide switching tube for rear class
Group switching moment can avoid the due to voltage spikes raw because of transformer leakage miscarriage.
Fig. 3 is the circuit decoupling principle figure of transformer rear class matrix converter.The modulator approach keeps matrix converter equivalent
Resolve into two common voltage source inverters.When transformer imput current is timing, the positive S for organizing inverter1a、S2a、S3a、S4a、
S5a、S6aIn three-phase modulations state, group inverter S is born1b、S2b、S3b、S4b、S5b、S6bIt is in the conductive state；Transformer input electricity
When stream signal is negative, group inverter S is born1b、S2b、S3b、S4b、S5b、S6bThree-phase modulations state, the positive S for organizing inverter1a、S2a、S3a、
S4a、S5a、S6aIt is in the conductive state.
Fig. 4 is the mode circuit diagram in one high frequency period of phase shift type three-phase high frequency chain matrix inverter of the present invention,
The middle present invention is in circuit with the circuit structure of high frequency transformer replacement Industrial Frequency Transformer using High Frequency Link.Fig. 4 (a) ∽ Fig. 4
It (l) is respectively following 1 ∽ 12 of operation mode.It is assumed that all components in topology are ideal component, according to working principle,
There are 12 working conditions in a high frequency period, specific model analysis is as follows:
(1) 1 [t of operation mode0-t1], t0S before moment1、S4It is in the conductive state, ipThrough S1、S4Circulation starts backward
Grade transmits energy, inverter work is just being organized in matrix converter, switching tube is on state, filtered electrical in negative group inverter
Inducing current iLfStart linear rise.
(2) 2 [t of operation mode1-t2], t1Moment switching tube S1Triggering turns off, in order to prevent bridge arm direct pass, switching tube S2's
Dead zone appropriate should be added in trigger signal.Primary current ipTo C1Charging, while giving C2Electric discharge.Due to transformer primary in this stage
Secondary voltage is zero, therefore switching tube S1Zero voltage turn-off can be achieved.Due to primary current clamping action, output inductor
Electric current iLfThe state of a mode is still kept, linear decline, b phase capacitor charging in filter network are started, a, c phase capacitor discharge,
The switching tube of matrix converter all turns at this time.
(3) 3 [t of operation mode2-t3], t2Moment capacitor C1、C2Charge and discharge terminate, ipThrough D2、S4Circulation, the triggering of this stage are opened
Close pipe S2It opens, it can be achieved that no-voltage is open-minded.Transformer primary secondary voltage is zero in this stage, the switching tube of matrix converter
It all turns on, output inductor electric current iLfStill in freewheeling state on last stage, b, c phase capacitor charging in filter network, a
The electric discharge of phase capacitor.
(4) 4 [t of operation mode3-t4], t3Moment switching tube S4Triggering shutdown, primary current ipTo C4Charging, while giving C3
Electric discharge, switching tube S4Zero voltage turn-off can be achieved.This stage matrix converter switches pipe S4b、S5b、S6bIt closes, output filtering net
Network remains the state of a mode.
(5) 5 [t of operation mode4-t5], t4Moment capacitor C4、C3Charge and discharge terminate, power tube S in this stage3Realize zero electricity
Logical, transformer leakage inductance and rear class switching tube parasitic capacitance generation resonance are pressed off, while transformer both end voltage is-Ui, therefore B point
Voltage is zero, makes clamp diode DC2Conducting, by UBCClamper is in-Ui.Due to t4Moment transformer secondary voltage is zero, and input is straight
Galvanic electricity pressure is all reversely added on Lr, and ir and ip are dropped rapidly to zero, and reversely increase.Due to the effect of resonant inductance, transformation
Device both end voltage reverse linear rises.Output filter network remains the state of a mode.
(6) 6 [t of operation mode5-t6], in this stage, primary side gives secondary side to provide energy, ipEqual to ir, filter inductance electric current
iLfLinear rise, output filter network remain the state of a mode.
(7) 7 [t of operation mode6-t7], t6Moment, switching tube S1bShutdown, S4bIt is connected, a, b phase capacitor fill in filter network
Electricity, the electric discharge of c phase capacitor.
(8) 8 [t of operation mode7-t8], t7Moment switching tube S2Triggering shutdown, primary current ipTo C2Charging, while giving C1
Electric discharge, switching tube S2Zero voltage turn-off can be achieved, transformer primary secondary voltage is zero in this stage, the switch of matrix converter
Pipe all turns on, output inductor electric current iLfStill in circulation status on last stage, b phase capacitor charging in filter network,
A, c phase capacitor discharges.
(9) 9 [t of operation mode8-t9], t8Moment capacitor C2、C1Charge and discharge terminate, ipThrough D1、S3Circulation, this stage internal trigger
Power tube S1It opens, it can be achieved that its no-voltage is open-minded.The voltage at transformer both ends is zero in this stage, the switch of matrix converter
Pipe all turns on, output inductor electric current iLfStill in freewheeling state on last stage, b, c phase capacitor fill in filter network
Electricity, the electric discharge of a phase capacitor.
(10) 10 [t of operation mode9-t10], t9Moment switching tube S3Triggering shutdown, primary current ipTo C3Charging, gives simultaneously
C4Electric discharge, switching tube S3Zero voltage turn-off can be achieved.Transformer primary secondary voltage is zero in this stage, and output filter network is protected
Hold the state of a mode.
(11) 11 [t of operation mode10-t11], t10Moment, capacitor C3、C4Charge and discharge terminate, power tube S in this stage4It realizes
No-voltage is open-minded, while transformer both end voltage is Ui, B point voltage is Ui, make clamp diode DC1Conducting, by UBCClamper exists
Ui。ipAfter being dropped rapidly to zero, forward direction increases sharply, matrix converter switching tube S4a、S5a、S6aIt closes.B, c phase in filter network
Capacitor charging, the electric discharge of a phase capacitor.
(12) 12 [t of operation mode11-t12], t11Moment, clamp diode DC1It closes, output filter network remains one
The state of mode, circuit enter next cycle.
Using coupling unipolarity phase shift modulation method of unhitching plus clamp diode three it can be seen from the above course of work
The zero voltage switch of switching tube in topology may be implemented in phase high-frequency chain inverter, and greatly reduces by transformer leakage inductance and open
Close voltage oscillation caused by pipe parasitic capacitance.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (4)
1. a kind of phase shift type three-phase high frequency chain matrix inverter topological structure, which is characterized in that including full-bridge inverter, transformation
Device T, matrix converter, LC mode filter, each component are sequentially connected composition；
Wherein, the full-bridge inverter is by DC input voitage Ui, controlled tr tube S1, controlled tr tube S2, controlled tr tube S3、
Controlled tr tube S4, diode DC1, diode DC2, inductance LrComposition；
The matrix converter is by controlled tr tube S1a, controlled tr tube S4b, controlled tr tube S4a, controlled tr tube S1b, it is controllable
Switching tube S3a, controlled tr tube S6b, controlled tr tube S6a, controlled tr tube S3b, controlled tr tube S5a, controlled tr tube S2b、
Controlled tr tube S2a, controlled tr tube S5bComposition；
The LC mode filter is by the first inductance Lf1, the second inductance Lf2, third inductance Lf3, first capacitor Cf1, the second capacitor Cf2、
Third capacitor Cf3, load R1, load R2, load R3Composition；
The DC input voitage UiAnode respectively with controlled tr tube S1Collector, diode DC1Anode, controllable switch
Pipe S3Collector be connected, the DC input voitage UiCathode respectively with controlled tr tube S2Emitter, diode DC2's
Cathode, controlled tr tube S4Emitter be connected；
Controlled tr tube S1Emitter respectively with inductance LrOne end, controlled tr tube S2Collector be connected；Controlled tr tube
S3Emitter respectively with transformer T primary side one end, controlled tr tube S4Collector be connected, inductance LrThe other end respectively with
Diode DC1Cathode, diode DC2Anode, transformer T primary side the other end be connected；
The one end on transformer T pair side respectively with controlled tr tube S1aCollector, controlled tr tube S3aCollector, controllable switch
Pipe S5aCollector be connected, the other end on transformer T pair side respectively with controlled tr tube S1bCollector, controlled tr tube S3b
Collector, controlled tr tube S5bCollector be connected；Controlled tr tube S1aEmitter and controlled tr tube S4bEmitter
It is connected, controlled tr tube S3aEmitter and controlled tr tube S6bEmitter be connected, controlled tr tube S5aEmitter with can
Control switching tube S2bEmitter be connected；
Controlled tr tube S1bEmitter and controlled tr tube S4aEmitter be connected, controlled tr tube S3bEmitter with can
Control switching tube S6aEmitter be connected, controlled tr tube S5bEmitter and controlled tr tube S2aEmitter be connected；
Controlled tr tube S4aCollector and controlled tr tube S4bCollector be connected after with the first inductance Lf1One end is connected, the
One inductance Lf1The other end and first capacitor Cf1One end, load R1One end is connected, and loads R1The other end respectively with load R2, load R3
It is connected；First capacitor Cf1The other end respectively with the second capacitor Cf2, third capacitor Cf3, load R1, load R2, load R3It is connected；
Controlled tr tube S6aCollector and controlled tr tube S6bCollector be connected after with the second inductance Lf2One end is connected, the
Two inductance Lf2The other end and the second capacitor Cf2, load R2One end is connected, and loads R2The other end respectively with load R1, load R3It is connected；
Second capacitor Cf2The other end respectively with first capacitor Cf1, third capacitor Cf3, load R1, load R2, load R3It is connected；
Controlled tr tube S2aCollector and controlled tr tube S2bCollector be connected after and third inductance Lf3One end is connected, the
Three inductance Lf3The other end and third capacitor Cf3, load R3One end is connected, and loads R3The other end respectively with load R1, load R2It is connected；
Third capacitor Cf3The other end respectively with first capacitor Cf1, the second capacitor Cf2, load R1, load R2, load R3It is connected.
2. a kind of modulation methods of the modulation of phase shift type three-phase high frequency chain matrix inverter topological structure according to claim 1
Method, it is characterised in that: phase shift type matrix inverter is controlled using the PWM of change in duty cycle, the controlled tr tube S1, it is controllable
Switching tube S4The bridge arm and controlled tr tube S of composition2, controlled tr tube S3The bridge arm alternate conduction of composition；Series resonance inductor is real
The zero voltage switch of existing switching tube；The voltage of the primary side of transformer T and two clamp diode connected ends is clamped diode clamp
Position is in 0 and UiBetween；The matrix converter of transformer T rear class is equivalent to two groups of common voltage source inverters and carries out coupling control of unhitching
System unhitches coupling logic modulation circuit to controlled tr tube S according to voltage-type1a~controlled tr tube S6a, controlled tr tube S1b~can
Control switching tube S6bIt is controlled, the high-frequency resonant electric current that transformer T is exported converts low frequency pulsating electric current.
3. phase shift modulation method according to claim 2, it is characterised in that: using the uni-polarity phase-shifted control in duty ratio
The angle θ be it is continually changing, in the case where modulation degree is m, wherein o < m < 1, variation range is 2 180 ° < θ < 180 ° (1-m)；
In a switch periods TsIn time, controlled tr tube S1With S4、S2With S3Common turn-on time are as follows: Tcom=Ts(180°-θ)/
360°。
4. modulator approach according to claim 2, it is characterised in that: the matrix converter of transformer T rear class uses voltage
Type unhitches coupling control, and matrix converter switching tube is resolved into positive and negative two groups, i.e. controlled tr tube S1a∽S6aAnd controlled tr tube
S1b∽S6b, it is all turned on for positive group when bearing a group switching tube when just organizing switching tube work and all turn on, and bearing group switching tube work, after
Grade matrix converter is equivalent at two groups of common voltage type inverters.
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