CN105915095A - LC series resonance high frequency chain matrix-type inverter topology and resonance modulation method thereof - Google Patents

LC series resonance high frequency chain matrix-type inverter topology and resonance modulation method thereof Download PDF

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Publication number
CN105915095A
CN105915095A CN201610297097.6A CN201610297097A CN105915095A CN 105915095 A CN105915095 A CN 105915095A CN 201610297097 A CN201610297097 A CN 201610297097A CN 105915095 A CN105915095 A CN 105915095A
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China
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controlled
tube
resonance
high frequency
current
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Inventor
闫朝阳
秦海宁
王洪斌
李建霞
庞建霞
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Yanshan University
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Yanshan University
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Priority to CN201610297097.6A priority Critical patent/CN105915095A/en
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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
    • H02M7/53871—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 with automatic control of output voltage or current
    • 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
    • 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
    • H02M5/2932—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 with automatic control of output voltage, current or power

Abstract

The present invention provides a LC series resonance high frequency chain matrix-type inverter topology and a resonance modulation method thereof. The topology comprises of a full bridge LC series resonance inverter, a high-frequency transformer T, a matrix converter and a CL-type filter which are connected in order. The modulation method is configured to process the SPWM wave through separation and link semi-excitation modulation logics to obtain driving signals of a transformer pre-stage LC series resonance inverter and a transformer post-stage matrix converter so as to allow the work duty ratio of the transformer pre-stage resonance circuit excitation resonance work state in the resonance half period to be controllable and realize the control of energy side transmission to the output load. The transformer post-stage matrix converter is modulated and decoupled to two common current-type inverters for controlling, a switch tube performs switching during the zero current outputting to realize zero current switching to avoid causing voltage overshoot problems and realize energy bidirectional flow and four-quadrant operation. The power transformation grades are few, the control method is simple, the circuit stability is high, and the like.

Description

LC series resonance high frequency chain matrix inverter topology and resonant modulation method thereof
Technical field
The present invention relates to electronic power converter modulation and control field, a kind of single-phase LC connects The coupling half excitation resonant modulation method of unhitching of mode of resonance high frequency chain matrix inverter.
Background technology
Inverter is the topology apparatus that a kind of direct current energy is converted into AC energy.High-frequency chain inverter uses High frequency transformer substitutes Industrial Frequency Transformer and overcomes that traditional transformer volume is big, noise big, high in cost of production shortcoming. The conversion process of high frequency chain matrix inverter has tri-kinds of power features of DC/HFAC/LFAC, wherein, HFAC: High-frequency ac, LFAC: low-frequency ac.Understand in this type of inverter and occur in that DC/AC i.e. AC/DC is inverse Becoming link, this link is positioned at transformer primary side, occurs in that again AC/AC i.e. AC/AC transform part, this ring Joint also commonly referred to as frequency converter or matrix converter link, be positioned at transformer secondary.Matrix converter and biography System changer is compared, and does not has intermediate energy storage link, uses two-way switch, it is possible to achieve the two-way flow of energy, Compact conformation, volume are little, efficiency is high, and output voltage amplitude and frequency can independently control.
Due to the existence of high frequency transformer leakage inductance, during the high frequency chain matrix inverter change of current, at transformer secondary Bigger voltage overshoot, therefore transformer secondary matrix/frequency converter is produced on the power tube of matrix converter Safe commutation always restriction high-frequency chain inverter realize the technological difficulties promoted on a large scale.Currently mainly have The most several Safe commutation strategies: 1. suppress voltage overshoot by adding active-clamp, it is possible to achieve soft open Closing, but the clamp circuit introduced adds cost, the controlled power pipe of increase also makes control increasingly complex；② Unipolarity and bi-polarity phase-shifted control strategy by the commutation overlap of frequency converter achieve inductive current from So change of current, and achieve the ZVS of power tube, but there is the problems such as the commutation overlap time is wayward；③ Introduce series resonant circuit at preceding-stage inversion device and realize the soft commutation of power tube, now require that power tube switches Occur in the zero current moment, and control output energy demand judges resonance duty so that control Mode processed is complicated.
But, although above-mentioned strategy is capable of Safe commutation, but causes the modulation of inverter and control more Complexity, causes system reliability to be lowered so that and have impact on promoting the use of of this quasi-converter.
Summary of the invention
Power conversion grade is few, modulate simple LC series resonance High Frequency Link to present invention aim at providing one Matrix inverter unhitches coupling series resonance modulator approach.
For achieving the above object, have employed techniques below scheme: LC series resonance High Frequency Link square of the present invention Configuration inverter topology is by full-bridge LC series resonant inverter, high frequency transformer T, matrix converter, CL Mode filter is sequentially connected with composition；
Full-bridge LC series resonant inverter is by DC input voitage Ui, controlled tr tube S1, controlled tr tube S2, controlled tr tube S3, controlled tr tube S4, inductance Lr, electric capacity CrComposition；Matrix converter is by controlled Switching tube SP1, controlled tr tube SP2, controlled tr tube SP3, controlled tr tube SP4, controlled tr tube SN1、 Controlled tr tube SN2, controlled tr tube SN3, controlled tr tube SN4Composition；CL mode filter is by inductance Lf、 Electric capacity CfWith load R composition；
DC input voitage UiPositive pole respectively with controlled tr tube S1Colelctor electrode, controlled tr tube S3Collection Electrode is connected, controlled tr tube S1Emitter stage respectively with inductance LrOne end, controlled tr tube S2Current collection The most connected；Controlled tr tube S3Emitter stage one end, limit former with high frequency transformer T, controlled tr tube S respectively4 Colelctor electrode be connected, DC input voitage UiNegative pole respectively with controlled tr tube S2Emitter stage, controlled open Close pipe S4Emitter stage be connected；Inductance LrThe other end and electric capacity CrOne end connect, electric capacity CrAnother The other end holding limit former with high frequency transformer T is connected；
One end of high frequency transformer T secondary respectively with controlled tr tube SP1Colelctor electrode, controlled tr tube SP3 Colelctor electrode be connected, controlled tr tube SP1Emitter stage and controlled tr tube SN2Colelctor electrode be connected, controlled Switching tube SN2Emitter stage respectively with controlled tr tube SP2Colelctor electrode, inductance LfOne end, electric capacity Cf One end be connected, controlled tr tube SP2Emitter stage and controlled tr tube SN1Colelctor electrode be connected；Controlled open Close pipe SP3Emitter stage and controlled tr tube SN4Colelctor electrode be connected, controlled tr tube SN4Emitter stage divide Not and controlled tr tube SP4Colelctor electrode, electric capacity CfThe other end, load R one end be connected, load R The other end and inductance LfThe other end be connected；Controlled tr tube SP4Emitter stage and controlled tr tube SN3's Colelctor electrode be connected, the other end of high frequency transformer T secondary respectively with controlled tr tube SN1Emitter stage, controlled Switching tube SN3Emitter stage be connected.
A kind of coupling series resonance modulator approach of unhitching of LC series resonance high frequency chain matrix inverter topology, entirely Bridge LC series resonant inverter uses half excitation resonance to control, described controlled tr tube S1, controlled tr tube S4The brachium pontis of composition and controlled tr tube S2, controlled tr tube S3The brachium pontis alternate conduction of composition, makes at circuit In excitation resonant condition, controlled tr tube S1, controlled tr tube S4With controlled tr tube S2, controlled tr tube S3Dutycycle is being turned on by sinusoidal rule change, i.e. LC series resonant circuit respectively in resonance positive and negative half period Excitation resonant operational state dutycycle within the resonance half period is by sinusoidal rule change, at not up to resonance half Controlled tr tube S is turned off during the cycle1, controlled tr tube S2, controlled tr tube S3, controlled tr tube S4, knot Bundle circuit activation resonant operational state；Transformator output area is zero by sinusoidal rule change and periodic regression Resonance current；The matrix converter of transformator rear class is equivalent to two groups of common current source inverters and solves Knot coupling controls, and unhitches coupling logic modulation circuit to controlled tr tube S according to current modeP1～controlled tr tube SP4、 Controlled tr tube SN1～controlled tr tube SN4It is controlled, the high-frequency resonant electric current that transformator T exports is turned Change low frequency pulsating electric current.
Further, full-bridge LC series resonant inverter controlled tr tube S within the resonance half period turns on duty Than by sinusoidal rule conversion, controlled tr tube S closes its excitation resonant operational state of having no progeny to be terminated, resonance current It is classified as rapidly zero, switches at this zero current output stage transformator T rear class matrix converter, transformator T In secondary leakage inductance, no current flows through, it is to avoid the due to voltage spikes caused because interrupting leakage inductance to store energy flux path.
Further, the matrix converter of transformator T rear class uses current mode to unhitch coupling control, will matrix Converter switches pipe resolves into positive and negative two groups, i.e. controlled tr tube SP1～SP4With controlled tr tube SN1～SN4, just During group switching tube work, negative group switching tube is all off, and is just organizing all off during negative group switching tube work, after Level matrix converter equivalence can become two groups of common current type inverters.
Work process approximately as:
Transformator preceding stage high frequency inverter introduces LC series resonance groove, uses PWM control method, at resonance Make resonance circuit excitation resonant operational state by sinusoidal variations in half period, input direct voltage is modulated into half Sinusoidal interrupted high-frequency ac current.The matrix converter of transformator rear class uses current mode to unhitch coupling modulation methods Method, is converted into unipolar electric current by the high-frequency ac current that transformator exports.
Compared with prior art, present invention have the advantage that energy transmission control mode is simple, it is not necessary to sentence Deenergizing resonant operational state, modulation complexity is low, and principle the most easily realizes, it is possible to without by auxiliary electricity Road can realize the Zero Current Switch (ZCS) of all power tubes in transformer secondary matrix converter, it is to avoid because beating Disconnected transformer secondary leakage inductance stores energy flux path and causes voltage-overshoot problem, improve circuit reliability and Efficiency.
Accompanying drawing explanation
Fig. 1 is inverter circuit topology figure of the present invention.
Fig. 2 is the system principle diagram of the inventive method.
Fig. 3 is this coupling half excitation resonant modulation method operation principle oscillogram of unhitching.
Fig. 4 is the resonant condition equivalent operation schematic diagram of resonant slots circuit.
Fig. 5 is that the circuit decoupling that transformer secondary matrix converter unhitches under coupling half excitation resonant modulation in current mode is former Reason figure.
Fig. 6 is the coupling half excitation resonance logic processing circuit that unhitches of high-frequency inverter.
Fig. 7 is the single-phase LC series resonance high frequency chain matrix inverter part cardinal principle under the inventive method controls Oscillogram.
Fig. 8 is single-phase one the high frequency week of LC series resonance-type high frequency chain matrix inverter under the inventive method controls Mode circuit diagram in phase.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings:
LC series resonance high frequency chain matrix inverter of the present invention topology is by full-bridge LC series-resonant inverting Device, high frequency transformer T, matrix converter, CL mode filter are sequentially connected with composition；Transformator preceding stage high frequency Inverter circuit introduces LC series resonance groove, and output becomes being dominated by electric current, DC input voitage UiBe converted to Resonance current ip, by high frequency transformer coupling output to transformer secondary, adjust through transformator rear class matrix converter System, by filter filtering output low frequency sinusoidal voltage Uo。
Full-bridge LC series resonant inverter is by DC input voitage Ui, controlled tr tube S1, controlled tr tube S2, controlled tr tube S3, controlled tr tube S4, inductance Lr, electric capacity CrComposition；Matrix converter is by controlled Switching tube SP1, controlled tr tube SP2, controlled tr tube SP3, controlled tr tube SP4, controlled tr tube SN1、 Controlled tr tube SN2, controlled tr tube SN3, controlled tr tube SN4Composition；CL mode filter is by inductance Lf、 Electric capacity CfWith load R composition；
As it is shown in figure 1, DC input voitage UiPositive pole respectively with controlled tr tube S1Colelctor electrode, controlled Switching tube S3Colelctor electrode be connected, controlled tr tube S1Emitter stage respectively with inductance LrOne end, controlled open Close pipe S2Colelctor electrode be connected；Controlled tr tube S3Emitter stage one end, limit former with high frequency transformer T respectively, Controlled tr tube S4Colelctor electrode be connected, DC input voitage UiNegative pole respectively with controlled tr tube S2Send out Emitter-base bandgap grading, controlled tr tube S4Emitter stage be connected；Inductance LrThe other end and electric capacity CrOne end connect, electricity Hold CrThe other end on other end limit former with high frequency transformer T be connected；
One end of high frequency transformer T secondary respectively with controlled tr tube SP1Colelctor electrode, controlled tr tube SP3 Colelctor electrode be connected, controlled tr tube SP1Emitter stage and controlled tr tube SN2Colelctor electrode be connected, controlled Switching tube SN2Emitter stage respectively with controlled tr tube SP2Colelctor electrode, inductance LfOne end, electric capacity Cf One end be connected, controlled tr tube SP2Emitter stage and controlled tr tube SN1Colelctor electrode be connected；Controlled open Close pipe SP3Emitter stage and controlled tr tube SN4Colelctor electrode be connected, controlled tr tube SN4Emitter stage divide Not and controlled tr tube SP4Colelctor electrode, electric capacity CfThe other end, load R one end be connected, load R The other end and inductance LfThe other end be connected；Controlled tr tube SP4Emitter stage and controlled tr tube SN3's Colelctor electrode be connected, the other end of high frequency transformer T secondary respectively with controlled tr tube SN1Emitter stage, controlled Switching tube SN3Emitter stage be connected.
As in figure 2 it is shown, modulator approach of the present invention is as follows:
Fig. 2 includes SPWM information Risk factor (1), unhitch coupling half excitation resonant modulation logical process electricity Road (2) and controlled device single-phase LC series resonance-type high frequency chain matrix inverter (3).Wherein SPWM It is identical with desired output low frequency sinusoidal wave frequency to complementary SPWM signal that information Risk factor produces two Low-frequency square-wave signal U1、U2, and coupling half excitation resonant modulation method logic circuit of transferring to unhitch carries out at signal Reason, gained drives signal can realize half excitation resonant operational state dutycycle of transformator preceding stage high frequency inverter Controlling, transformator rear class matrix converter is modulated into two common current source inverters and carries out coupling control of unhitching, Thus only rely on the dutycycle controlling resonance half period underexcitation resonant operational state and convert to realize DC/AC, The Zero Current Switch of matrix converter switching tube is realized during transformator zero current exports.
Half excitation resonance of the present invention refers to that transformator preceding stage high frequency inverter switching device pipe is humorous in LC series connection ON time dutycycle in the half period of shaking is closed resonance current of having no progeny relied on switch by sinusoidal rule change, switching tube The anti-paralleled diode afterflow of pipe, terminates rapidly to encourage resonant condition, makes prime resonance circuit export electric current and is Zero.Current mode of the present invention is unhitched coupling, comprises the work of " decoupling " and " knot coupling " two parts.One, Decoupling work is the analysis for circuit feature and physical connection, and decomposition pressure swing device output AC electric current is direct current Pulsating current, decomposing two-way gate-controlled switch circuit is unidirectional gate-controlled switch circuit, therefore can be by frequency converter solution Coupling becomes positive and negative two groups of common current source inverters.Its two, knot coupling work then lay particular emphasis on logistic transformation and control Realizing, its core controls thinking and is: the power tube bearing group inverter when just organizing inverter work is completely in pass Disconnected state, in like manner, the power tube just organizing inverter during negative group inverter work is all off, according to transformator The polar selecting switch pipe conducting of output current polarity and power frequency sinusoidal modulation signal.
Fig. 3 is coupling half excitation resonant modulation method operation principle oscillogram of unhitching.In figure, K is SPWM ring The M signal that two pairs of SPWM signals that joint produces produce, S1、S4And S2、S3For transformator preceding stage high frequency The driving signal of inverter power pipe, U1、U2For the complementary low frequency side identical with desired output sine wave freuqency Ripple signal, VP、VNFor the complementary high-frequency square-wave signal of carrier frequency, SP1～SP4、SN1～SN4After transformator The driving signal of level matrix converter power tube, resonance current ipThe high-frequency ac current transmitted for transformator, Electric current ifSingle polarity current waveform for the output of transformator rear class matrix converter.By drive signal it can be seen that Transformer primary side high-frequency inverter switching tube S1、S4And S2、S3Driving signal duty within the resonance half period Than by sinusoidal rule change, i.e. the excitation resonant condition of transformator prime LC series resonant inverter is at resonance half Conducting dutycycle in cycle is by sinusoidal rule change, and switching tube closes circuit activation resonant condition of having no progeny to be terminated, Resonance current in resonant slots quickly falls to zero, terminating to transmit to the energy of load-side, swashing so being referred to as half Encourage resonant modulation.In transformator rear class matrix converter power tube to open and turn off be all in transformer current It is to complete during zero, therefore the Zero Current Switch (ZCS) of power tube can be realized.At any time after transformator The level same brachium pontis of matrix converter at most only has a power tube and is in opening state, and power tube half week Phase is off state, and another half period is in square-wave frequency modulation state, and switch switching exists Dead Time, anti- Only filter capacitor leads directly to, and therefore the present invention can realize the Zero Current Switch of matrix converter switching tube, and control Mode processed is simple.
Fig. 4 is the resonant condition equivalent operation schematic diagram of resonant slots circuit.Wherein UiFor DC input voitage, UCf/ n is the output filter capacitor voltage equivalence magnitude of voltage to transformer primary side, and n is transformer voltage ratio, UrFor Resonant network both end voltage, irFor resonance current.Under this modulation system resonance circuit can be divided into excitation resonance and Feedback resonance two states, as switching tube S1、S4Or S2、S3During conducting, circuit is in excitation resonant condition, DC input voitage UiAs voltage drive source, with equivalent voltage UCf/ n subtracts each other and acts on resonant network, humorous Vibrating network both end voltage UrWith resonance current irKeep same phase, energy by DC voltage through resonant network to defeated Go out side transmission；, after switching tube is all off, circuit is in feedback resonant condition, DC input voitage Ui With equivalent voltage UCf/ n addition back action, in resonant network, makes resonance current decline rapidly, resonant network two Terminal voltage UrWith resonance current irKeep 180 degree anti-phase, energy by resonant network to DC voltage and outlet side Transmission, resonance current reduces rapidly.
Fig. 5 is the circuit decoupling under coupling half excitation resonant modulation method of unhitching of the transformator rear class matrix converter Schematic diagram.This modulator approach makes matrix converter equivalence resolve into two common current source inverters.When just String power frequency modulated signal is timing, is just organizing the S of inverterP1、SP4With negative group of inverter SN1、SN4At high frequency Being respectively at conducting state in positive and negative half period, rest switch pipe is off state；When power frequency modulated signal For time negative, just organizing the S of inverterP2、SP3S with negative group of inverterN2、SN3In high frequency positive and negative half period Being respectively at conducting state, rest switch pipe is in off state.
Fig. 6 is that this single-phase LC series resonance-type high frequency chain matrix inverter unhitches coupling half excitation resonance logic Process circuit.Exporting with logic of SPWM1 Yu SPWM4 and SPWM2 Yu SPWM3 is carried out logic Or computing, obtain pulsewidth by the M signal K of sinusoidal variations, by SPWM1's and SPWM2 or computing knot Fruit carries out rising edge two divided-frequency computing, obtains high frequency positive half period signal VP, it is negated and obtains high frequency negative half Periodic signal VN, by signal K and VPCarry out logical AND and obtain switching tube S1、S4Driving signal, will letter Number K and VNCarry out logical AND and obtain switching tube S2、S3Driving signal, by VP、VNRespectively with U1Carry out Logical AND obtains transformator rear class matrix converter switching tube SP1、SP4And SN1、SN4Driving signal, will VP、VNRespectively with U2Carry out logical AND and obtain transformator rear class matrix converter switching tube SP2、SP3And SN2、 SN3Driving signal.
Fig. 7 is the single-phase LC series resonance height under coupling half excitation resonant modulation method control that unhitches in the present invention Frequently chain matrix inverter main operational principle oscillogram.Wherein S1、S4And S2、S3Inverse for transformator prime Become device switching tube drive waveforms, electric current ipFor resonance current waveform, SP1、SP4And SN1、SN4After transformator Level matrix converter switching tube drive waveforms, electric current ifFor the single polarity current ripple after matrix converter is modulated Shape.
Fig. 8 be the present invention unhitch coupling half excitation resonant modulation method control under single-phase LC mode of resonance High Frequency Link Matrix inverter each stage equivalent circuit diagram.Figure (a)～(j) is respectively following operation mode 1～10.Assuming that topology In all components and parts be preferable components and parts, according to operation principle, in a high frequency period, have 10 Duty, concrete model analysis is as follows:
1) operation mode 1 [t0-t1], t0Moment switching tube S1、S4Conducting, DC input voitage UiIt is added in LC On series resonance groove, resonance current ipBy sinusoidal rule change, matrix converter switching tube SP1、SP4It is in and leads Logical state, direct current input side energy is transmitted to load-side by resonant slots, and now to be in excitation humorous for resonance circuit Shake state, until t1Moment, switching tube S1、S4Turning off, this mode terminates.
2) operation mode 2 [t1-t2], t1Moment turns off S1、S4, resonance current ipThrough switching tube S2、S3Inverse parallel Diode continuousing flow, matrix converter switching tube SP1、SP4In the conduction state, provide circulation path for electric current, Now DC input voitage UiResonant slots the most reversely it is added in the voltage of filter capacitor equivalence to transformer primary side On, make resonance current ipReducing to rapidly zero, resonance circuit is in feedback resonant condition, until t2Moment is humorous The electric current that shakes drops to zero, and this mode terminates.
3) operation mode 3 [t2-t3], at t2Moment resonance current ipVanishing, resonant slots does not has electric current to flow, Matrix converter switching tube SP1、SP4Conducting, no current flows in matrix converter, load relies on filter network Energy is provided.Until switching tube SP1、SP4Turning off, this mode terminates.
4) operation mode 4 [t3-t4], at t3Moment switching tube SP1、SP4Turn off, now prime resonance inverter Still no current output, rear class matrix converter switching tube is all off, when matrix converter is in switch switching The of short duration dead band stage.
5) operation mode 5 [t4-t5], at t4Moment opens matrix converter switching tube SN1、SN4, for next mould The electric current of state transformator output provides circulation path, and this stage preceding-stage inversion device switching tube is completely in shutoff shape State, until switching tube S2、S3Open-minded, this mode terminates.
6) operation mode 6 [t5-t6], at t5Moment switching tube S2、S3Open-minded, DC input voitage UiReversely It is added in resonant slots, resonance current ipNegative sense is sinusoidal variations, rear class matrix converter switching tube SN1、SN4 In the conduction state, provide circulation path for electric current, direct current input side energy is passed to load-side by resonant slots Passing, now resonance circuit is in excitation resonant condition, until t6Moment, switching tube S2、S3Turn off, this mould State terminates.
7) operation mode 7 [t6-t7], at t6Moment on-off switching tube S2、S3, rear class matrix converter switching tube SN1、SN4Still in conducting state；Now DC input voitage UiWith filter capacitor voltage equivalence to transformator The voltage on former limit is the most reversely added in resonant slots, makes resonance current ipReducing to rapidly zero, resonance circuit is in Feedback resonant condition, until t7Moment resonance current drops to zero, and this mode terminates.
8) operation mode 8 [t7-t8], at t7Moment resonance current vanishing, does not has in preceding-stage inversion device resonance circuit Electric current is had to flow, matrix converter switching tube SN1、SN4Conducting, no current flows in matrix converter, negative Carry and rely on filter network to provide energy, until switching tube SN1、SN4Turning off, this mode terminates.
9) operation mode 9 [t8-t9], at t8Moment switching tube SN1、SN4Turning off, now preceding-stage inversion device is without electricity Stream output, rear class matrix converter switching tube is all off, matrix converter be in switch switching time of short duration The dead band stage.
10) operation mode 10 [t9-t10], at t9Moment opens matrix converter switching tube SP1、SP4, for next Mode transformer output current provides circulation path, and this stage preceding-stage inversion device switching tube is completely in shutoff shape State, until switching tube S1、S4Open-minded, this mode terminates.
By above work process it can be seen that transformator prime prime resonance circuit encourages the work of resonant condition Dutycycle is controlled, i.e. the energy to load-side transmission is adjustable, it is achieved DC/AC changes, and resonance current is periodically Back to zero, transformator rear class frequency converter switching tube switches during zero current exports, it is achieved Zero Current Switch, The due to voltage spikes avoiding interrupting the circulation path of transformer secondary leakage inductance energy and cause, improves circuit reliability And efficiency.
Embodiment described above is only to be described the preferred embodiment of the present invention, not to this Bright scope is defined, on the premise of designing spirit without departing from the present invention, and those of ordinary skill in the art The various deformation making technical scheme and improvement, all should fall into claims of the present invention and determine Protection domain in.

Claims (4)

1. a LC series resonance high frequency chain matrix inverter topology, it is characterised in that: described LC goes here and there Connection resonant frequencies chain matrix inverter topology is by full-bridge LC series resonant inverter, high frequency transformer T, square Battle array changer, CL mode filter are sequentially connected with composition；
Full-bridge LC series resonant inverter is by DC input voitage Ui, controlled tr tube S1, controlled tr tube S2, controlled tr tube S3, controlled tr tube S4, inductance Lr, electric capacity CrComposition；Matrix converter is by controlled Switching tube SP1, controlled tr tube SP2, controlled tr tube SP3, controlled tr tube SP4, controlled tr tube SN1、 Controlled tr tube SN2, controlled tr tube SN3, controlled tr tube SN4Composition；CL mode filter is by inductance Lf、 Electric capacity CfWith load R composition；
DC input voitage UiPositive pole respectively with controlled tr tube S1Colelctor electrode, controlled tr tube S3Collection Electrode is connected, controlled tr tube S1Emitter stage respectively with inductance LrOne end, controlled tr tube S2Current collection The most connected；Controlled tr tube S3Emitter stage one end, limit former with high frequency transformer T, controlled tr tube S respectively4 Colelctor electrode be connected, DC input voitage UiNegative pole respectively with controlled tr tube S2Emitter stage, controlled open Close pipe S4Emitter stage be connected；Inductance LrThe other end and electric capacity CrOne end connect, electric capacity CrAnother The other end holding limit former with high frequency transformer T is connected；
One end of high frequency transformer T secondary respectively with controlled tr tube SP1Colelctor electrode, controlled tr tube SP3 Colelctor electrode be connected, controlled tr tube SP1Emitter stage and controlled tr tube SN2Colelctor electrode be connected, controlled Switching tube SN2Emitter stage respectively with controlled tr tube SP2Colelctor electrode, inductance LfOne end, electric capacity Cf One end be connected, controlled tr tube SP2Emitter stage and controlled tr tube SN1Colelctor electrode be connected；Controlled open Close pipe SP3Emitter stage and controlled tr tube SN4Colelctor electrode be connected, controlled tr tube SN4Emitter stage divide Not and controlled tr tube SP4Colelctor electrode, electric capacity CfThe other end, load R one end be connected, load R The other end and inductance LfThe other end be connected；Controlled tr tube SP4Emitter stage and controlled tr tube SN3's Colelctor electrode be connected, the other end of high frequency transformer T secondary respectively with controlled tr tube SN1Emitter stage, controlled Switching tube SN3Emitter stage be connected.
2. one kind based on described in claim 1 LC series resonance high frequency chain matrix inverter topology unhitch Coupling series resonance modulator approach, it is characterised in that: full-bridge LC series resonant inverter uses half excitation resonance control System, described controlled tr tube S1, controlled tr tube S4The brachium pontis of composition and controlled tr tube S2, gate-controlled switch Pipe S3The brachium pontis alternate conduction of composition, makes circuit be in excitation resonant condition, controlled tr tube S1, controlled open Close pipe S4With controlled tr tube S2, controlled tr tube S3Dutycycle is being turned on respectively in resonance positive and negative half period By sinusoidal rule change, i.e. LC series resonant circuit excitation resonant operational state duty within the resonance half period Than by sinusoidal rule change, turn off controlled tr tube S when the not up to resonance half period1, controlled tr tube S2、 Controlled tr tube S3, controlled tr tube S4, terminate circuit activation resonant operational state；Transformator output area It is the resonance current of zero by sinusoidal rule change and periodic regression；The matrix converter equivalence of transformator rear class It is that two groups of common current source inverters carry out coupling control of unhitching, unhitches coupling logic modulation circuit according to current mode To controlled tr tube SP1～controlled tr tube SP4, controlled tr tube SN1～controlled tr tube SN4It is controlled, The high-frequency resonant electric current conversion low frequency pulsating electric current that transformator T is exported.
The coupling that unhitches of LC series resonance high frequency chain matrix inverter the most according to claim 2 topology Series resonance modulator approach, it is characterised in that: full-bridge LC series resonant inverter is controlled within the resonance half period Switching tube S conducting dutycycle is by sinusoidal rule conversion, and controlled tr tube S closes its excitation resonant operational shape of having no progeny State terminates, and resonance current is classified as rapidly zero, exports stage transformator T rear class matrix converter at this zero current Switching over, in transformator T secondary leakage inductance, no current flows through, it is to avoid store energy flux road because interrupting leakage inductance Footpath and the due to voltage spikes that causes.
The coupling that unhitches of LC series resonance high frequency chain matrix inverter the most according to claim 2 topology Series resonance modulator approach, it is characterised in that: the matrix converter of transformator T rear class uses current mode to unhitch Coupling controls, and will resolve into positive and negative two groups by matrix converter switching tube, i.e. controlled tr tube SP1～SP4With controlled Switching tube SN1～SN4, just organizing negative group switching tube during switching tube work all off, and during negative group switching tube work Just organizing all off, rear class matrix converter equivalence can become two groups of common current type inverters.
CN201610297097.6A 2016-05-06 2016-05-06 LC series resonance high frequency chain matrix-type inverter topology and resonance modulation method thereof Pending CN105915095A (en)

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