CN107994770A - Single-stage current type converter with series multistage switch L.C. network - Google Patents

Single-stage current type converter with series multistage switch L.C. network Download PDF

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Publication number
CN107994770A
CN107994770A CN201810019722.XA CN201810019722A CN107994770A CN 107994770 A CN107994770 A CN 107994770A CN 201810019722 A CN201810019722 A CN 201810019722A CN 107994770 A CN107994770 A CN 107994770A
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China
Prior art keywords
switch
power
network
energy storage
phase
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CN201810019722.XA
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Chinese (zh)
Inventor
陈道炼
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Qingdao University
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Qingdao University
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Priority to CN201810019722.XA priority Critical patent/CN107994770A/en
Publication of CN107994770A publication Critical patent/CN107994770A/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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • H02M3/073—Charge pumps of the Schenkel-type
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc 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
    • H02M7/217—Conversion of ac power input into dc 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
    • H02M7/219—Conversion of ac power input into dc 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 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
    • 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
    • H02M1/0074—Plural converter units whose inputs are connected in series

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

A kind of single-stage current type converter circuit structure with series multistage switch L.C. network, it is that sequentially cascade is formed by input DC power or single phase alternating current power supply, high frequency hybrid modulation switch, capacitive filter, DC load or single phase ac load, and multiple-pole switch L.C. network is in series between input power and high frequency hybrid modulation switch；Multiple-pole switch L.C. network is that L.C. network is unit cascaded forms for n by energy storage inductor and sequentially cascaded identical SLCS types Two-port netwerks switch, and wherein n is the natural number more than 1；Each SLCS types Two-port netwerk switch L.C. network unit, is made of two power diodes or two four-quadrant power switch, an energy storage inductor, a storage capacitor；High frequency hybrid modulation switch is made of power diode, two quadrant power switch or four-quadrant power switch.This converter can be by unstable wide excursion low-voltage DC or single-phase alternating current single-stage efficient conversion into stabilization, high-quality direct current or single-phase sinusoidal ac.

Description

Single-stage current type converter with series multistage switch L.C. network
Technical field
A kind of single-stage current type converter with series multistage switch L.C. network according to the present invention, belongs to electric power electricity Sub- technology.
Background technology
Converter is one kind by direct current or convert alternating current into direct current or alternating current using power semiconductor Static ac dc converter device, uses for DC load or AC load (including generating electricity by way of merging two or more grid systems with AC network).
Since the fossil energies such as oil, coal and natural gas (non-renewable energy resources) growing tension, environmental pollution are serious, global Warm, nuclear energy production can produce nuke rubbish and the pollution reason such as environment, the energy and environment have become what the 21 century mankind had been faced Significant problem.The regenerative resources such as solar energy, wind energy, Hydrogen Energy, tide energy and geothermal energy (green energy resource), have cleaning without dirt The advantages that contaminating, is cheap, is reliable, is abundant, its development and utilization is increasingly valued by people, this holds countries in the world economy Supervention exhibition has considerable meaning.The direct current energy of the renewable energy conversions such as solar energy, Hydrogen Energy, tide energy, geothermal energy It is typically unstable to be used, it is necessary to be converted into another direct current energy supply load using DC-DC converter；Wind energy etc. The AC energy of renewable energy conversion is typically the alternating current of variable voltage variable frequency, it is necessary to be converted into using AC-DC converter Direct current energy uses (such as inverter load) for load；The primary power sources such as alternating current generator produce unstable alternating current, it is necessary to The AC energy supply AC load that same frequency constant pressure is converted into using AC-AC converters is used.With dc generator, storage Battery, solar cell, fuel cell, wind energy conversion system, alternating current generator etc. are main direct current, the conversion occasion of main AC power, directly Current converter, rectifier and AC converter are with a wide range of applications.
At present, DC-DC, AC-DC, AC-AC convert the traditional pwm converter circuit structure of occasion generally use, and there are bridge Arm power device need to set dead band or overlapping time, reliability and output waveform quality is low, step-up ratio not big enough (non-isolation type), The defects of volume weight of system is greatly with (input or output plus single phase industrial frequence transformer) of high cost.
Therefore, seek a kind of bridge arm need not set dead time, high reliability, single stage circuit structure it is new have connect it is more The single-stage current type converter of level switch L.C. network is extremely urgent.This efficiently against traditional pwm converter for existing Bridge arm must set dead time, step-up ratio not big enough (non-isolation type), the volume weight of system big and of high cost (input or output Add single phase industrial frequence transformer) the defects of, the output waveform quality, reliability and reduction input side EMI of transformation system are improved, is widened Power electronics converter technique and renewable energy power generation technical know-how, promote development and the development section of generation of electricity by new energy industry Energy type is respectively provided with important meaning with conservation-minded society.
The content of the invention
It is a kind of with big step-up ratio, single-stage power conversion, power density height, conversion efficiency the invention aims to provide The features such as height, output waveform quality are high, reliability is high, change range of input voltage is wide, cost is low has series multistage switch The single-stage current type converter of L.C. network.
Technical scheme 1 is：A kind of single-stage current type converter with series multistage switch L.C. network, It is sequentially to be cascaded and formed by input DC power, high frequency hybrid modulation switch, capacitive filter and DC load, and is inputting Multiple-pole switch L.C. network is in series between DC power supply and high frequency hybrid modulation switch；The multiple-pole switch L.C. network is By energy storage inductor L0The n identical SLCS types Two-port netwerk switch unit cascaded compositions of L.C. network sequentially cascaded, wherein n are Natural number more than 1；Each SLCS types Two-port netwerk switch L.C. network unit, is by two power diode SjAnd Sj', one Energy storage inductor Lj, a storage capacitor CjForm, power diode SjCathode and energy storage inductor LjOne end, storage capacitor Cj's Positive ends are connected, power diode SjAnode and energy storage inductor LjThe other end respectively with power diode Sj' sun Pole, cathode are connected, storage capacitor CjNegative polarity end with adjacent prime SLCS types Two-port netwerk switch L.C. network unit The positive ends of the storage capacitor of same position are connected, power diode SjWith power diode Sj' connecting pin and energy storage electricity Hold CjNegative polarity end constitute the input port of j-th SLCS types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith work( Rate diode Sj' connecting pin and storage capacitor CjPositive ends constitute j-th SLCS types Two-port netwerk switch L.C. network list The output port of member, input DC power positive polarity and storage capacitor C1The connecting pin of negative polarity and power diode S1With power Diode S1' connecting pin between be connected with energy storage inductor L0, wherein j is the natural number no more than n；The high frequency combination is adjusted System switch is by the two quadrant power switch S for bearing unidirectional voltage stress, bidirectional current stress1〞 and two pole of power Pipe S2〞 is formed, two quadrant power switch S1The drain electrode of 〞 or collector, power diode S2The anode and power diode S of 〞n' Cathode and energy storage inductor LnConnecting pin be connected, two quadrant power switch S1The source electrode or emitter of 〞 and input DC power Negative polarity end, the negative polarity end of output filter capacitor are connected, power diode S2The cathode of 〞 and the cathode of output filter capacitor Property end is connected.
Technical scheme 2 is：A kind of single-stage current type converter with series multistage switch L.C. network, It is sequentially to be cascaded and formed by input single-phase AC power, single-phase high frequency hybrid modulation switch, capacitive filter and DC load, and And it is in series with multiple-pole switch L.C. network between input single-phase AC power and single-phase high frequency hybrid modulation switch；Described is more Level switch L.C. network is by energy storage inductor L0The n identical SLCS types Two-port netwerk switch L.C. network units sequentially cascaded Cascade is formed, and wherein n is the natural number more than 1；Each SLCS types Two-port netwerk switch L.C. network unit, is by two four-quadrants Power switch SjAnd Sj', an energy storage inductor Lj, a storage capacitor CjForm, four-quadrant power switch SjOne end and energy storage Inductance LjOne end, storage capacitor CjReference positive ends be connected, four-quadrant power switch SjThe other end, energy storage inductor LjThe other end respectively with four-quadrant power switch Sj' both ends be connected, storage capacitor CjReference negative polarity end with it is adjacent The reference positive ends of the storage capacitor of same position are connected in prime SLCS types Two-port netwerk switch L.C. network unit, four-quadrant Limit power switch SjWith Sj' connecting pin and storage capacitor CjReference negative polarity end constitute j-th SLCS types Two-port netwerk switch The input port of L.C. network unit, energy storage inductor LjWith four-quadrant power switch Sj' connecting pin and storage capacitor CjReference Positive ends constitute the output port of j-th of SLCS types Two-port netwerk switch L.C. network unit, input single-phase AC power ginseng Examine positive polarity and storage capacitor C1Connecting pin and four-quadrant power switch S with reference to negative polarity1With four-quadrant power switch S1' Energy storage inductor L is connected between connecting pin0, wherein j is the natural number no more than n；The single-phase high frequency hybrid modulation switch It is the single-phase full bridge pulsewidth modulation being made of four two quadrant power switch for bearing unidirectional voltage stress and bidirectional current stress Rectification circuit.
Technical scheme 3 is：A kind of single-stage current type converter with series multistage switch L.C. network, It is that sequentially level is loaded by input single-phase AC power, single-phase high frequency hybrid modulation switch, single-phase capacitance wave filter and single phase ac Connection is formed, and is in series with multiple-pole switch LC net between input single-phase AC power and single-phase high frequency hybrid modulation switch Network；The multiple-pole switch L.C. network is by energy storage inductor L0The n identical SLCS types Two-port netwerk switches sequentially cascaded The unit cascaded composition of L.C. network, wherein n are the natural number more than 1；Each SLCS types Two-port netwerk switch L.C. network unit, is By two four-quadrant power switch SjAnd Sj', an energy storage inductor Lj, a storage capacitor CjForm, four-quadrant power switch Sj One end and energy storage inductor LjOne end, storage capacitor CjReference positive ends be connected, four-quadrant power switch SjIt is another End, energy storage inductor LjThe other end respectively with four-quadrant power switch Sj' both ends be connected, storage capacitor CjReference anode Property the end and reference positive polarity of the storage capacitor of same position in adjacent prime SLCS types Two-port netwerk switch L.C. network unit End is connected, four-quadrant power switch SjWith Sj' connecting pin and storage capacitor CjReference negative polarity end constitute j-th SLCS types Two-port netwerk switchs the input port of L.C. network unit, energy storage inductor LjWith four-quadrant power switch Sj' connecting pin and Storage capacitor CjReference positive ends constitute the output port of j-th SLCS types Two-port netwerk switch L.C. network unit, it is defeated Enter single-phase alternating current source reference positive polarity and storage capacitor C1Connecting pin and four-quadrant power switch S with reference to negative polarity1With S1′ Connecting pin between be connected with energy storage inductor L0, wherein j is the natural number no more than n；The single-phase high frequency hybrid modulation is opened Pass is that the four-quadrant power switch that bi-directional voltage stress and bidirectional current stress are born by two is formed, four-quadrant power switch S1〞 and S2One end of 〞 and energy storage inductor LnWith four-quadrant power switch Sn' connecting pin be connected, four-quadrant power switch S1〞's The other end is connected with the reference negative polarity end of input single-phase AC power, single-phase output filter capacitor, four-quadrant power switch S2The other end of 〞 is connected with the reference positive ends of single-phase output filter capacitor.
The present invention " will cascade structure by (single-phase) high frequency hybrid modulation switch, (single-phase) wave filter, (single phase industrial frequence transformer) Into traditional single stage (single-phase) pwm converter circuit structure or multi-stage cascade pwm converter circuit structure " be configured to " by multistage The single-level circuit that switch L.C. network and (single-phase) high frequency hybrid modulation switch, (single-phase) filters in series for sequentially cascading are formed Structure ", proposes single-stage current type converter new concept and circuit structure with series multistage switch L.C. network, i.e., first L.C. network unit is switched by providing the n sequentially cascaded identical SLCS types Two-port netwerk, utilizes prime SLCS type Two-port netwerks The output for switching L.C. network unit improves converter as the input of rear class SLCS types Two-port netwerk switch L.C. network unit Step-up ratio.By adjusting, SLCS types Two-port netwerk switchs the series n of L.C. network unit and magnetizing for converter energy storage inductor accounts for Sky compares D0=T0/TSCome realize converter boost than adjusting, wherein TSFor HF switch cycle time, T0For (single-phase) high frequency group Modulation switch is closed in a TSWhen interior ON time (being converted for DC-DC, AC-AC), lower bridge arm or upper bridge arm turns on jointly Between (for AC-DC convert).
The advantage of the invention is that：The present invention can be by unstable wide excursion low-voltage DC or single-phase alternating current list Level is transformed into stable, good direct current or single-phase sinusoidal ac, has single-stage power conversion, power density height, conversion effect The advantages such as rate is high, step-up ratio is big, output waveform quality is high, reliability is high, cost is low, suitable for DC-DC, AC-DC and AC-AC electricity Occasion can be converted.
Brief description of the drawings
Fig. 1 have the circuit structure of the single-stage current mode DC-DC converter of series multistage switch L.C. network.
Fig. 2 have the principle waveform of the single-stage current mode DC-DC converter of series multistage switch L.C. network.
Fig. 3 have the circuit topology reality of the single-stage current mode DC-DC converter of series multistage switch L.C. network Example.
Fig. 4 have the single-stage current mode DC-DC converter energy storage inductor of series multistage switch L.C. network in high frequency D during hybrid modulation switch conduction0TSThe equivalent circuit that magnetizes.
Fig. 5 have the single-stage current mode DC-DC converter energy storage inductor of series multistage switch L.C. network in high frequency (1-D during hybrid modulation switch cut-off0)TSMagnetic equivalent circuit of dispelling.
Fig. 6 have the control principle frame of the single-stage current mode DC-DC converter of series multistage switch L.C. network Figure.
Fig. 7 have the control principle ripple of the single-stage current mode DC-DC converter of series multistage switch L.C. network Shape.
Fig. 8 have the circuit structure of the single-stage current mode A.C.-D.C. converter of series multistage switch L.C. network.
Fig. 9 have the principle waveform of the single-stage current mode A.C.-D.C. converter of series multistage switch L.C. network.
Figure 10 have the circuit topology reality of the single-stage current mode A.C.-D.C. converter of series multistage switch L.C. network Example.
Figure 11 have the single-stage current mode A.C.-D.C. converter energy storage inductor of series multistage switch L.C. network under D during bridge arm turns on0TSAnd the equivalent circuit that magnetizes during input voltage positive half cycle.
Figure 12 have the single-stage current mode A.C.-D.C. converter energy storage inductor of series multistage switch L.C. network in bridge (1-D during arm cross-conduction0)TSAnd the magnetic equivalent circuit of dispelling during input voltage positive half cycle.
Figure 13 have the single-stage current mode A.C.-D.C. converter energy storage inductor of series multistage switch L.C. network under D during bridge arm turns on0TSAnd the equivalent circuit that magnetizes during input voltage negative half period.
Figure 14 have the single-stage current mode A.C.-D.C. converter energy storage inductor of series multistage switch L.C. network in bridge (1-D during arm cross-conduction0)TSAnd the magnetic equivalent circuit of dispelling during input voltage negative half period.
Figure 15 have the control principle frame of the single-stage current mode A.C.-D.C. converter of series multistage switch L.C. network Figure.
Figure 16 have the control principle ripple of the single-stage current mode A.C.-D.C. converter of series multistage switch L.C. network Shape.
Figure 17 have the circuit structure of the single-stage current mode ac-to-ac converter of series multistage switch L.C. network.
Figure 18 have the principle waveform of the single-stage current mode ac-to-ac converter of series multistage switch L.C. network.
Figure 19 have the circuit topology reality of the single-stage current mode ac-to-ac converter of series multistage switch L.C. network Example.
Figure 20 have the single-stage current mode ac-to-ac converter energy storage inductor of series multistage switch L.C. network in height D during frequency hybrid modulation switch conduction0TSAnd the equivalent circuit that magnetizes during input voltage positive half cycle.
Figure 21 have the single-stage current mode ac-to-ac converter energy storage inductor of series multistage switch L.C. network in height (1-D during the switch cut-off of frequency hybrid modulation0)TSAnd the magnetic equivalent circuit of dispelling during input voltage positive half cycle.
Figure 22 have the single-stage current mode ac-to-ac converter energy storage inductor of series multistage switch L.C. network in height D during frequency hybrid modulation switch conduction0TSAnd the equivalent circuit that magnetizes during input voltage negative half period.
Figure 23 have the single-stage current mode ac-to-ac converter energy storage inductor of series multistage switch L.C. network in height (1-D during the switch cut-off of frequency hybrid modulation0)TSAnd the magnetic equivalent circuit of dispelling during input voltage negative half period.
Figure 24 have the control principle frame of the single-stage current mode ac-to-ac converter of series multistage switch L.C. network Figure.
Figure 25 have the control principle ripple of the single-stage current mode ac-to-ac converter of series multistage switch L.C. network Shape.
Embodiment：
Technical scheme 1 is described further with reference to the accompanying drawings and embodiments.
With series multistage switch L.C. network single-stage current mode DC-DC converter, be by input DC power, High frequency hybrid modulation switch, capacitive filter and DC load sequentially cascade composition, and in input DC power and high frequency group Multiple-pole switch L.C. network is in series between conjunction modulation switch；The multiple-pole switch L.C. network is by energy storage inductor L0With according to The n identical SLCS types Two-port netwerk switch unit cascaded compositions of L.C. network of sequence cascade, wherein n is the natural number more than 1；Often A SLCS types Two-port netwerk switchs L.C. network unit, is by two power diode SjAnd Sj', an energy storage inductor Lj, a storage Can capacitance CjForm, power diode SjCathode and energy storage inductor LjOne end, storage capacitor CjPositive ends be connected, Power diode SjAnode and energy storage inductor LjThe other end respectively with power diode Sj' anode, cathode be connected, store up Can capacitance CjNegative polarity end and the energy storage electricity of same position in adjacent prime SLCS types Two-port netwerk switch L.C. network unit The positive ends of appearance are connected, power diode SjWith power diode Sj' connecting pin and storage capacitor CjNegative polarity end structure Into the input port of j-th of SLCS types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith power diode Sj' company Connect end and storage capacitor CjPositive ends constitute the output port of j-th SLCS types Two-port netwerk switch L.C. network unit, Input DC power positive polarity and storage capacitor C1The connecting pin of negative polarity and power diode S1With power diode S1' company Connect and be connected with energy storage inductor L between holding0, wherein j is the natural number no more than n；The high frequency hybrid modulation switch is by one A two quadrant power switch S for bearing unidirectional voltage stress, bidirectional current stress1〞 and power diode S2〞 form, two as Limit power switch S1The drain electrode of 〞 or collector, power diode S2The anode and power diode S of 〞n' cathode and energy storage inductor LnConnecting pin be connected, two quadrant power switch S1The source electrode or emitter of 〞 and the negative polarity end of input DC power, output The negative polarity end of filter capacitor is connected, power diode S2The cathode of 〞 is connected with the positive ends of output filter capacitor.
Single-stage current mode dc-dc converter circuit structure and principle ripple with series multistage switch L.C. network Shape, respectively as shown in Figure 1, 2.In Fig. 1,2, UiFor input direct voltage, ZLTo export DC load, Uo、IoRespectively output is straight Galvanic electricity is pressed and DC current.Multiple-pole switch L.C. network is by energy storage inductor L0The n identical SLCS types two sequentially cascaded The cascade of port Impedance network unit is formed, and wherein n is the natural number more than 1, and each SLCS types Two-port netwerk switchs L.C. network list Member, is by two power diode SjAnd Sj', an energy storage inductor Lj, a storage capacitor CjForm；High frequency hybrid modulation is opened Pass is by the two quadrant power switch S for bearing unidirectional voltage stress, bidirectional current stress1〞 and power diode S2〞 Form；Output filter is only capacitive filter；Input DC power UiCan be set between multiple-pole switch L.C. network or Input filter is not provided with, the pulsation of input direct-current electric current can be reduced when input filter is set.When high frequency hybrid modulation switchs During conducting, input DC power UiWith storage capacitor C1、…CnTogether to energy storage inductor L0、L1、…LnMagnetize, export DC load Maintain to power by output capacitance wave filter；When high frequency hybrid modulation, which switchs, to be ended, energy storage inductor L0、L1、…LnDispel magnetic and and Input DC power UiCooperatively to storage capacitor C1、…CnWith output DC load power supply.Multiple-pole switch L.C. network and height Frequency hybrid modulation is switched input direct voltage UiIt is modulated into high frequency pulse dc voltage u1, DC load is being exported after filtered It is upper to obtain smooth DC voltage u2, that is, export DC voltage Uo。
Single-stage DC-DC converter of the present invention, is to utilize the n identical SLCS type Two-port netwerks sequentially cascaded The output for switching L.C. network unit and prime Two-port netwerk switch LC unit switchs the defeated of LC unit for rear class Two-port netwerk Enter improve converter boost than single stage circuit structure, exist with traditional single-stage PWM dc-dc converter circuits structure Difference substantially.Therefore, single-stage DC-DC converter of the present invention has novelty and creativeness, and has There are conversion efficiency high (meaning that energy loss is small), power density high (meaning that volume, weight are small), step-up ratio (to mean greatly The wider or lower input direct voltage of excursion can be transformed into required output DC voltage), output voltage ripple it is small, Reliability is high, input voltage prepares the advantages that flexible, cost is low, application prospect is extensive, is that a kind of preferably energy-saving type is straight Stream-DC converter, has more important value energy-saving, conservation-minded society today vigorously advocating to build.
Single-stage current mode dc-dc converter circuit topology embodiment with series multistage switch L.C. network, such as Shown in Fig. 3.In Fig. 3, high frequency hybrid modulation switch S1' MOSFET element is selected, the devices such as IGBT, GTR also can be selected.Described Single-stage DC-DC converter can be by a kind of unstable low-voltage DC (such as storage battery, photovoltaic cell, fuel cell, wind-force Machine etc.) required stabilization, good high voltage direct current are transformed into, it is widely used in the civilian industry DC power supply of boosting occasion (such as communication DC converter and photovoltaic DC converter 24VDC/220VDC, 48VDC/380VDC, 96VDC/380VDC) and state Anti- industrial DC power supply (such as aviation DC converter 27VDC/270VDC).
Each energy storage inductor of single-stage current mode DC-DC converter with series multistage switch L.C. network is one A HF switch cycle TSInside magnetizing and dispel, respectively once, during magnetizing correspond to high frequency hybrid modulation switchs S to magnetic1〞 turns on (S2〞 is cut Only) period D0TS, and high frequency hybrid modulation switch S is corresponded to during magnetic of dispelling1〞 ends (S2〞 is turned on) period (1-D0)TS(i.e. to output During side output energy).The DC-DC converter energy storage inductor switchs S in high frequency hybrid modulation1〞 turns on (S2〞 is cut Only) period D0TSMagnetize equivalent circuit and high frequency hybrid modulation switch S1〞 ends (S2〞 is turned on) period (1-D0)TSMagnetic of dispelling etc. Circuit is imitated, respectively as shown in Figure 4,5.In Fig. 4,5, output voltage UoPolarity be reference direction, and each current polarity is actual Direction.
If storage capacitor terminal voltage is in a HF switch cycle TSIt is inside invariable, uses UC1、UC2、…、UCnTable Show.Energy storage inductor switchs S in high frequency hybrid modulation as shown in Figure 41" conducting (S2" cut-off) period D0TSThe equivalent circuit that magnetizes can ,
In formula (1.0)-(1.n), n is the natural number more than 1, and j is the natural number no more than n.Energy storage inductor as shown in Figure 5 S is switched in high frequency hybrid modulation1" cut-off (S2" conducting) period (1-D0)TSMagnetic equivalent circuit of dispelling can obtain,
In formula (2.n), U1S is switched for high frequency hybrid modulation1" cut-off (S2" conducting) period (1-D0)TSVoltage u1Width Value.According to State-space Averaging Principle, formula (1) × D0+ formula (2) × (1-D0), orderIt can obtain, it is more Level switch L.C. network storage capacitor magnitude of voltage UC1、UC2、…、UCnFor
High frequency hybrid modulation switchs S1" cut-off (S2" conducting) period (1-D0)TSVoltage u1Amplitude, that is, voltage U2, output voltage UO, i.e.,
Therefore, there is the voltage transfer ratio of the single-stage current mode DC-DC converter of series multistage switch L.C. network For
From formula (5), the voltage transfer ratio of the single-stage DC-DC converter is in different n, D01 is all higher than during value, And more than the voltage transfer ratio D of traditional single stage PWM DC-DC converters0(Buck types), 1/ (1-D0) (Boost type), D0/ (1-D0) (Buck-Boost types)；It was found from energy storage inductor shown in Fig. 4,5 magnetizes and dispels magnetic equivalent circuit, the single-stage direct current- DC converter belongs to current mode (Boost type) converter, particularly can improve the boosting of converter by increasing n values Than.Multistage, single-stage in " the single-stage current mode DC-DC converter with series multistage switch L.C. network " refer to respectively " series of switch L.C. network " and " the conversion series of converter ".
Single-stage current mode DC-DC converter with series multistage switch L.C. network only has single-stage power conversion ring Section, its control system need to realize the control of output voltage, and when supplying power for photovoltaic cell also needs to realize the maximum work of photovoltaic cell Rate point tracing control MPPT.Therefore, this single-stage DC-DC converter uses the PWM control strategies of output voltage feedback, such as Fig. 6, shown in 7.Output voltage feedback signal UofWith reference voltage UrSignal U is obtained after comparison, error amplificatione, UeCarried with triangle Ripple ucHand over and high frequency hybrid modulation switch S is exported after cutting1" control signal.As input voltage UiOr load ZLDuring change, pass through tune Save conducting dutycycle D0To realize output voltage UoStabilization.Therefore, the single-stage DC-DC converter uses output voltage The PWM control strategies of feedback are practicable.
Technical scheme 2 is described further with reference to the accompanying drawings and embodiments.
Single-stage current mode A.C.-D.C. converter with series multistage switch L.C. network, is exchanged by input single-phase Power supply, single-phase high frequency hybrid modulation switch, capacitive filter and DC load sequentially cascade composition, and are exchanged in input single-phase Multiple-pole switch L.C. network is in series between power supply and single-phase high frequency hybrid modulation switch；The multiple-pole switch L.C. network is By energy storage inductor L0The n identical SLCS types Two-port netwerk switch unit cascaded compositions of L.C. network sequentially cascaded, wherein n are Natural number more than 1；Each SLCS types Two-port netwerk switch L.C. network unit, is by two four-quadrant power switch SjAnd Sj′、 One energy storage inductor Lj, a storage capacitor CjForm, four-quadrant power switch SjOne end and energy storage inductor LjOne end, storage Can capacitance CjReference positive ends be connected, four-quadrant power switch SjThe other end, energy storage inductor LjThe other end respectively with Four-quadrant power switch Sj' both ends be connected, storage capacitor CjReference negative polarity end and adjacent prime SLCS type Two-port netwerks The reference positive ends of the storage capacitor of same position are connected in switch L.C. network unit, four-quadrant power switch SjWith Sj′ Connecting pin and storage capacitor CjReference negative polarity end constitute the defeated of j-th SLCS types Two-port netwerk switch L.C. network unit Inbound port, energy storage inductor LjWith four-quadrant power switch Sj' connecting pin and storage capacitor CjReference positive ends constitute The output port of j SLCS types Two-port netwerk switch L.C. network unit, input single-phase AC power is with reference to positive polarity and energy storage electricity Hold C1Connecting pin and four-quadrant power switch S with reference to negative polarity1With four-quadrant power switch S1' connecting pin between be connected with Energy storage inductor L0, wherein j is the natural number no more than n；The single-phase high frequency hybrid modulation switch is born unidirectionally by four The single-phase full bridge pulsewidth modulation rectification circuit that two quadrant power switch of voltage stress and bidirectional current stress are formed.
Single-stage current mode A.C.-D.C. converter circuit structure and principle ripple with series multistage switch L.C. network Shape, respectively as shown in Figure 8,9.In Fig. 8,9, uiFor input single-phase alternating voltage, ZLTo export DC load, Uo、IoIt is respectively defeated Go out DC voltage and DC current, the symbol "+" of storage capacitor represents the ginseng of storage capacitor voltage in multiple-pole switch L.C. network Examine positive ends.Multiple-pole switch L.C. network is by energy storage inductor L0The n identical SLCS type Two-port netwerks sequentially cascaded are opened The unit cascaded composition of L.C. network is closed, wherein n is the natural number more than 1, and each SLCS types Two-port netwerk switchs L.C. network unit, It is by two four-quadrant power switch SjAnd Sj', an energy storage inductor Lj, a storage capacitor CjForm；Single-phase high frequency combination is adjusted System switch, is the single-phase full bridge arteries and veins being made of four two quadrant power switch for bearing unidirectional voltage stress and bidirectional current stress Wide modulation rectification circuit；Output filter is only capacitive filter；Input ac power uiWith multiple-pole switch L.C. network it Between can set or be not provided with input filter, the harmonic content of input AC electric current can be reduced when input filter is set.Work as list During the lower bridge arm conducting of phase high frequency hybrid modulation switch (single-phase rectification bridge), input ac power uiWith storage capacitor C1、…CnIt is right Energy storage inductor L0、L1、…LnMagnetize, output DC load maintains power supply by capacitive filter；When single-phase high frequency hybrid modulation is opened When closing (single-phase rectification bridge) bridge arm switch cross conduction, energy storage inductor L0、L1、…LnDispel magnetic and with input ac power uiTogether Jointly to storage capacitor C1、…CnPower with DC load.Multiple-pole switch L.C. network and single-phase high frequency hybrid modulation switch are (single Commutating phase bridge) by input ac voltage uiAmplitude is modulated into by one times of change of incoming frequency sinusoidal envelope line gauge rule, pulsewidth by just The tri-state SPWM ripples u of string rule change1, straight after single-phase high frequency hybrid modulation switchs (single-phase rectification bridge), capacitive filter The DC voltage u of high quality is obtained on current load2, that is, export DC voltage Uo
Single-stage and-phase A.C.-D.C. converter of the present invention, is to utilize the n identical SLCS types two sequentially cascaded The output of port switch L.C. network unit and prime Two-port netwerk switch L.C. network unit switchs LC for rear class Two-port netwerk The input of network unit come improve converter boost than single stage circuit structure, become with traditional single-stage and-phase PWM AC-DC There is difference substantially for circuit structure for parallel operation (regardless of whether addition single-phase input Industrial Frequency Transformer).Therefore, institute of the present invention The single-stage and-phase A.C.-D.C. converter stated has novelty and creativeness, and (means that energy damages with conversion efficiency height Consume small), power density high (meaning that volume, weight are small), step-up ratio are big (means that excursion is wider or lower single-phase defeated Enter alternating voltage and can be transformed into required output DC voltage), input current waveform distortion it is small, output voltage waveforms ripple is small, Reliability is high, input voltage prepares the advantages that flexible, cost is low, application prospect is extensive, is a kind of preferably energy-saving type list Cross streams-DC converter, have more important value energy-saving, conservation-minded society today vigorously advocating to build.
Single-stage current mode A.C.-D.C. converter circuit topology embodiment with series multistage switch L.C. network, such as Shown in Figure 10.In Figure 10, output filter is capacitor filter；Single-phase high frequency hybrid modulation switch (single-phase rectification bridge) is selected MOSFET element, also can be selected the devices such as IGBT, GTR；The symbol "+" of storage capacitor represents energy storage in multiple-pole switch L.C. network The reference positive ends of capacitance voltage.The single-stage and-phase A.C.-D.C. converter can be by a kind of unstable low-voltage alternating-current Electric (such as wind energy conversion system, land-based AC power and aviation AC power) is transformed into required stabilization, high-quality, high voltage direct current, extensively The general civilian industry single-phase rectifier power for being applied to boosting occasion is (such as communication rectifier and wind-power electricity generation rectifier 220V50HzAC/380VDC, frequency-changing AC voltage/380VDC) and national defense industry rectifier power source (such as aviation rectifier 115V400HzAC/270VDC) etc..
Each energy storage inductor of single-stage current mode A.C.-D.C. converter with series multistage switch L.C. network is one A HF switch cycle TSInside magnetize and dispel magnetic respectively once, D during corresponding lower bridge arm conducting during magnetizing0TS, and it is right during magnetic of dispelling Answer (1-D during bridge arm cross-conduction0)TS(during exporting energy to DC side).The single-stage and-phase A.C.-D.C. converter The D during the conducting of energy storage inductor lower bridge arm in input voltage positive and negative half cycle0TSThe equivalent circuit that magnetizes, during bridge arm cross-conduction (1-D0)TSMagnetic equivalent circuit of dispelling, respectively as shown in Figure 11,12,13,14.In Figure 11,12,13,14, input voltage uiWith it is more The polarity of storage capacitor voltage is reference polarity in level switch L.C. network, and each current polarity is actual direction.
If storage capacitor terminal voltage is in a HF switch cycle TSIt is inside invariable, uses UC1、UC2、…、UCnTable Show.Energy storage inductor switchs S in high frequency hybrid modulation as shown in Figure 11,133〞、S4D during 〞 is turned on0TSThe equivalent circuit that magnetizes can Obtain formula (1.0)-(1.n)；Energy storage inductor switchs S in high frequency hybrid modulation as shown in Figure 12,141〞、S4〞(S2〞、S3〞) turn on the phase Between (1-D0)TSMagnetic equivalent circuit of dispelling can obtain formula (2.0)-(2.n)；According to State-space Averaging Principle, formula (1) × D0+ formula (2) × (1-D0), orderObtain multiple-pole switch L.C. network storage capacitor magnitude of voltage UC1、UC2、…、UCnBy Formula (3.1)-(3.n) is represented；Single-phase high frequency hybrid modulation switchs the voltage magnitude U of (single-phase rectification bridge) exchange side1And DC side Voltage U2Represented by formula (4).Therefore, there is the single-stage current mode A.C.-D.C. converter of series multistage switch L.C. network Voltage transfer ratio be
From formula (6), the voltage transfer ratio of the single-stage and-phase A.C.-D.C. converter is in different n, D0It is equal during value More than 1, and more than the voltage transfer ratio D of traditional single stage PWM A.C.-D.C. converters0(Buck types), 1/ (1-D0)(Boost Type), D0/(1-D0) (Buck-Boost types)；It was found from energy storage inductor shown in Figure 11,12,13,14 magnetizes and dispels magnetic equivalent circuit, The single-stage A.C.-D.C. converter belongs to current mode (Boost type) converter, can particularly be improved by increasing n values The step-up ratio of converter." have series multistage switch L.C. network single-stage current mode A.C.-D.C. converter " in multistage, Single-stage refers to " series of switch L.C. network " and " the conversion series of converter " respectively.
Single-stage current mode A.C.-D.C. converter with series multistage switch L.C. network only has single-stage power conversion ring Section, its control system need to realize the control of the storage capacitor voltage of multiple-pole switch L.C. network and output DC voltage, wind-force Also need to realize the MPPT maximum power point tracking control MPPT of wind energy conversion system during power generation.Therefore, this single-stage and-phase AC-DC converter Device is using output DC voltage outer shroud, the bicyclic SPWM control plans of multiple-pole switch L.C. network storage capacitor voltage inter-loop control Slightly, as shown in Figure 15,16.Output voltage feedback signal UofWith reference voltage UrComparison, the amplified signal of error are as inner ring Reference signal UCnr, storage capacitor voltage feedback signal UCnfAfter absolute value circuit with reference signal UCnrComparison, error amplification Obtain signal ue, ueWith triangular carrier ucHand over the signal intercepted with input voltage polarity selection signal through appropriate logic electricity Output single-phase high frequency hybrid modulation switchs (single-phase rectification bridge) S behind road1〞、S3〞、S2〞、S4The four of 〞 and multiple-pole switch L.C. network Quadrant power switch S1、S2、…、Sn、S1′、S2′、…、Sn' control signal.As input voltage uiOr output loading ZLDuring change, By adjusting duty cycle signals D0To realize output voltage UoStabilization.Therefore, the single-stage and-phase A.C.-D.C. converter It is using the bicyclic SPWM control strategies for exporting DC voltage outer shroud, multiple-pole switch L.C. network storage capacitor voltage inter-loop controls It is practicable.
Technical scheme 3 is described further with reference to the accompanying drawings and embodiments.
Single-stage current mode ac-to-ac converter with series multistage switch L.C. network, is exchanged by input single-phase Sequentially cascade is formed for power supply, single-phase high frequency hybrid modulation switch, single-phase capacitance wave filter and single phase ac load, and is being inputted Multiple-pole switch L.C. network is in series between single phase alternating current power supply and single-phase high frequency hybrid modulation switch；The multiple-pole switch sense Content network is by energy storage inductor L0The n identical SLCS types Two-port netwerk switch unit cascaded structures of L.C. network sequentially cascaded Into wherein n is the natural number more than 1；Each SLCS types Two-port netwerk switch L.C. network unit, is opened by two four-quadrant power Close SjAnd Sj', an energy storage inductor Lj, a storage capacitor CjForm, four-quadrant power switch SjOne end and energy storage inductor Lj One end, storage capacitor CjReference positive ends be connected, four-quadrant power switch SjThe other end, energy storage inductor LjIt is another One end respectively with four-quadrant power switch Sj' both ends be connected, storage capacitor CjReference negative polarity end and adjacent prime The reference positive ends of the storage capacitor of same position are connected in SLCS types Two-port netwerk switch L.C. network unit, four-quadrant work( Rate switchs SjWith Sj' connecting pin and storage capacitor CjReference negative polarity end constitute j-th SLCS types Two-port netwerk switch LC The input port of network unit, energy storage inductor LjWith four-quadrant power switch Sj' connecting pin and storage capacitor CjReference cathode Property end constitute the output port of j-th SLCS types Two-port netwerk switch L.C. network unit, input single-phase AC power is with reference to just Polarity and storage capacitor C1Connecting pin and four-quadrant power switch S with reference to negative polarity1With S1' connecting pin between be connected with storage Can inductance L0, wherein j is the natural number no more than n；The single-phase high frequency hybrid modulation switch is to bear two-way electricity by two The four-quadrant power switch of compression and bidirectional current stress is formed, four-quadrant power switch S1〞 and S2One end of 〞 and energy storage electricity Feel LnWith four-quadrant power switch Sn' connecting pin be connected, four-quadrant power switch S1The other end of 〞 is exchanged with input single-phase Power supply, the reference negative polarity end of single-phase output filter capacitor are connected, four-quadrant power switch S2The other end and single-phase output of 〞 The reference positive ends of filter capacitor are connected.
Single-stage current mode ac-to-ac converter circuit structure and principle ripple with series multistage switch L.C. network Shape, respectively as shown in Figure 17,18.In Figure 17,18, uiFor input single-phase alternating voltage, ZLFor single-phase output AC load (including Single phase ac passive load and the load of single phase ac power grid), uo、ioRespectively single-phase output alternating voltage and alternating current, it is multistage The symbol "+" for switching storage capacitor in L.C. network represents the reference positive ends of storage capacitor voltage.Multiple-pole switch LC net Network is by energy storage inductor L0The n identical SLCS types Two-port netwerk switch unit cascaded compositions of L.C. network sequentially cascaded, its Middle n is the natural number more than 1, and each SLCS types Two-port netwerk switchs L.C. network unit, is by two four-quadrant power switch Sj And Sj', an energy storage inductor Lj, a storage capacitor CjForm；Single-phase high frequency hybrid modulation switch, be born by two it is two-way The four-quadrant power switch of voltage stress and bidirectional current stress is formed；Single phase filter is single-phase capacitance wave filter (blow-up When flowing passive load) or single-phase CL wave filters (when single phase ac power grid loads)；Input ac power uiWith multiple-pole switch LC Input filter can be set or is not provided between network, and the harmonic wave that input AC electric current can be reduced when setting input filter contains Amount.When single-phase high frequency hybrid modulation switch conduction, input ac power uiWith storage capacitor C1、…CnTo energy storage inductor L0、 L1、…LnMagnetize, output AC load maintains power supply by single-phase capacitance wave filter；End when single-phase high frequency hybrid modulation switchs When, energy storage inductor L0、L1、…LnDispel magnetic and with input ac power uiCooperatively to storage capacitor C1、…CnAnd AC load Power supply.Multiple-pole switch L.C. network and single-phase high frequency hybrid modulation are switched input ac voltage uiIt is defeated by one times to be modulated into amplitude Enter the tri-state SPWM ripples u that frequency sine envelope rule changes, pulsewidth is essentially identical1, after output filters in AC load Obtain the sinusoidal voltage u of high quality2, i.e. output voltage uo。
Single-stage and-phase ac-to-ac converter of the present invention, is to utilize the n identical SLCS types two sequentially cascaded The output of port switch L.C. network unit and first order Two-port netwerk switch L.C. network unit switchs for second level Two-port netwerk L.C. network unit input come improve converter boost than single stage circuit structure, exchange-friendship with traditional single-stage and-phase PWM There is difference substantially for circuit structure for current converter (regardless of whether addition single-phase input or output Industrial Frequency Transformer).Cause This, single-stage and-phase ac-to-ac converter of the present invention has novelty and creativeness, and with the high (meaning of conversion efficiency It is small that taste energy loss), power density high (meaning that volume, weight are small), step-up ratio are big (means that excursion is wider or more Low single-phase input alternating voltage can be transformed into required single-phase output alternating voltage), net side power factor is high, output voltage THD is small, reliability is high, input voltage prepares the advantages that flexible, cost is low, application prospect is extensive, is a kind of preferably energy saving drop Consumption type single phase ac-AC converter, has more important value energy-saving, conservation-minded society today vigorously advocating to build.
Single-stage current mode ac-to-ac converter circuit topology embodiment with series multistage switch L.C. network, such as Shown in Figure 19.What Figure 19 was provided is single-phase capacitance filter circuit, is not provided as space is limited suitable for output waveform quality requirement The single-phase CL filter circuits of higher；Single-phase high frequency hybrid modulation switch selects MOSFET element, and IGBT, GTR etc. also can be selected Device；The symbol "+" of storage capacitor represents the reference positive ends of storage capacitor voltage in multiple-pole switch L.C. network.Described Ac-to-ac converter can (such as wind energy conversion system, land-based AC power be exchanged with aviation by a kind of unstable single phase low voltage alternating current Power supply etc.) required stabilization, high-quality, high-voltage one-phase alternating current are transformed into, the civilian industry for being widely used in boosting occasion is single-phase AC voltage-stabilizing and variable-voltage power supply (such as electronic transformer 110V50HzAC/220V50HzAC) and national defense industry AC voltage-stabilizing and transformation Power supply (such as aviation electronics transformer 36V400HzAC/115V400HzAC).
Each energy storage inductor of single-stage current mode ac-to-ac converter with series multistage switch L.C. network is one A switch periods TSInside magnetizing and dispel, respectively once, during magnetizing correspond to single-phase high frequency hybrid modulation switchs S to magnetic1〞 turns on (S2〞 is cut Only) period D0TS, and single-phase high frequency hybrid modulation switch S is corresponded to during magnetic of dispelling1〞 ends (S2〞 is turned on) period (1-D0)TS(to negative During carrying side output energy).Ac-to-ac converter energy storage electricity in the case of the positive and negative half cycle of (output) voltage is inputted Sense switchs S in single-phase high frequency hybrid modulation1〞 turns on (S2〞 ends) period D0TSThe equivalent circuit that magnetizes, S1〞 ends (S2〞 is turned on) Period (1-D0)TSMagnetic equivalent circuit of dispelling, respectively as shown in Figure 20,21,22,23.In Figure 20,21,22,23, input voltage ui Polarity be reference direction, and each current polarity is actual direction.
If storage capacitor terminal voltage is in a HF switch cycle TSIt is inside invariable, uses UC1、UC2、…、UCnTable Show.Energy storage inductor switchs S in high frequency hybrid modulation as shown in Figure 20,221〞 turns on (S2〞 ends) period D0TSThe equivalent electric that magnetizes Lu Ke get Shi (1.0)-(1.n)；Energy storage inductor switchs S in high frequency hybrid modulation as shown in Figure 21,231〞 ends (S2〞 is turned on) phase Between (1-D0)TSMagnetic equivalent circuit of dispelling can obtain formula (2.0)-(2.n)；According to State-space Averaging Principle, formula (1) × D0+ formula (2) × (1-D0), orderObtain multiple-pole switch L.C. network storage capacitor magnitude of voltage UC1、UC2、…、UCnBy Formula (3.1)-(3.n) is represented；Single-phase high frequency hybrid modulation switchs the voltage magnitude U of (single-phase rectification bridge) exchange side1And DC side Voltage U2Represented by formula (4).Therefore, there is the single-stage current mode ac-to-ac converter of series multistage switch L.C. network Voltage transfer ratio be
From formula (7), the voltage transfer ratio of the single-stage and-phase ac-to-ac converter is in different n, D0It is equal during value More than 1, and more than the voltage transfer ratio D of traditional single stage PWM ac-to-ac converters0(Buck types), 1/ (1-D0)(Boost Type), D0/(1-D0) (Buck-Boost types)；It was found from energy storage inductor shown in Figure 20,21,22,23 magnetizes and dispels magnetic equivalent circuit, The single-stage ac-to-ac converter belongs to current mode (Boost type) converter, can particularly be improved by increasing n values The step-up ratio of converter." have series multistage switch L.C. network single-stage current mode A.C.-D.C. converter " in multistage, Single-stage refers to " series of switch L.C. network " and " the conversion series of converter " respectively.
Single-stage current mode ac-to-ac converter with series multistage switch L.C. network only has single-stage power conversion ring Section, its control system need to realize the control of output AC voltage, and when wind-power electricity generation also needs to realize the maximum power of wind energy conversion system Point tracing control MPPT.Therefore, this single-stage and-phase ac-to-ac converter uses output AC voltage instantaneous values feedback PWM Control strategy, as shown in Figure 24,25.Output voltage feedback signal uofWith reference voltage urComparison, error amplification, take absolute value after Obtain signal ue, ueWith triangular carrier ucThe signal intercepted is handed over to switch S as single-phase high frequency hybrid modulation1〞 and multiple-pole switch The four-quadrant power switch S of L.C. network1′、S2′、…、Sn' control signal, hand over the inversion signal conduct of signal intercepted Single-phase high frequency hybrid modulation switchs S2The four-quadrant power switch S of 〞 and multiple-pole switch L.C. network1、S2、…、SnControl letter Number.As input voltage uiOr output loading ZLDuring change, by adjusting duty cycle signals D0To realize output voltage uoStabilization. Therefore, the single-stage and-phase ac-to-ac converter is practical using output AC voltage instantaneous values feedback PWM control strategies Feasible.

Claims (3)

  1. A kind of 1. single-stage current type converter with series multistage switch L.C. network, it is characterised in that：This converter electricity Line structure is sequentially cascaded and formed by input DC power, high frequency hybrid modulation switch, capacitive filter and DC load, and Multiple-pole switch L.C. network is in series between input DC power and high frequency hybrid modulation switch；The multiple-pole switch LC Network is by energy storage inductor L0The n identical SLCS types Two-port netwerk switch unit cascaded compositions of L.C. network sequentially cascaded, Wherein n is the natural number more than 1；Each SLCS types Two-port netwerk switch L.C. network unit, is by two power diode SjWith Sj', an energy storage inductor Lj, a storage capacitor CjForm, power diode SjCathode and energy storage inductor LjOne end, energy storage Capacitance CjPositive ends be connected, power diode SjAnode and energy storage inductor LjThe other end respectively with power diode Sj' anode, cathode be connected, storage capacitor CjNegative polarity end and adjacent prime SLCS types Two-port netwerk switch L.C. network The positive ends of the storage capacitor of same position are connected in unit, power diode SjWith power diode Sj' connecting pin and Storage capacitor CjNegative polarity end constitute the input port of j-th SLCS types Two-port netwerk switch L.C. network unit, energy storage electricity Feel LjWith power diode Sj' connecting pin and storage capacitor CjPositive ends constitute the switch sense of j-th SLCS types Two-port netwerk The output port of content network unit, input DC power positive polarity and storage capacitor C1The connecting pin of negative polarity and power diode S1With power diode S1' connecting pin between be connected with energy storage inductor L0, wherein j is the natural number no more than n；The height Frequency hybrid modulation switch is by the two quadrant power switch S for bearing unidirectional voltage stress, bidirectional current stress1〞 and one Power diode S2〞 is formed, two quadrant power switch S1The drain electrode of 〞 or collector, power diode S2The anode and power two of 〞 Pole pipe Sn' cathode and energy storage inductor LnConnecting pin be connected, two quadrant power switch S1The source electrode or emitter of 〞 and input The negative polarity end of DC power supply, the negative polarity end of output filter capacitor are connected, power diode S2The cathode of 〞 is filtered with output The positive ends of capacitance are connected.
  2. A kind of 2. single-stage current type converter with series multistage switch L.C. network, it is characterised in that：This converter electricity Line structure is sequentially cascaded by input single-phase AC power, single-phase high frequency hybrid modulation switch, capacitive filter and DC load Form, and multiple-pole switch L.C. network is in series between input single-phase AC power and single-phase high frequency hybrid modulation switch； The multiple-pole switch L.C. network is by energy storage inductor L0The n identical SLCS types Two-port netwerk switch LC sequentially cascaded Network unit cascade is formed, and wherein n is the natural number more than 1；Each SLCS types Two-port netwerk switch L.C. network unit, is by two A four-quadrant power switch SjAnd Sj', an energy storage inductor Lj, a storage capacitor CjForm, four-quadrant power switch SjOne End and energy storage inductor LjOne end, storage capacitor CjReference positive ends be connected, four-quadrant power switch SjThe other end, Energy storage inductor LjThe other end respectively with four-quadrant power switch Sj' both ends be connected, storage capacitor CjReference negative polarity end With the reference positive ends phase of the storage capacitor of same position in adjacent prime SLCS types Two-port netwerk switch L.C. network unit Connection, four-quadrant power switch SjWith Sj' connecting pin and storage capacitor CjReference negative polarity end constitute j-th of SLCS type Two-port netwerk switchs the input port of L.C. network unit, energy storage inductor LjWith four-quadrant power switch Sj' connecting pin and energy storage electricity Hold CjReference positive ends constitute the output port of j-th SLCS types Two-port netwerk switch L.C. network unit, input single-phase AC power is with reference to positive polarity and storage capacitor C1Connecting pin and four-quadrant power switch S with reference to negative polarity1With four-quadrant power Switch S1' connecting pin between be connected with energy storage inductor L0, wherein j is the natural number no more than n；The single-phase high frequency combination Modulation switch is the single-phase full bridge being made of four two quadrant power switch for bearing unidirectional voltage stress and bidirectional current stress Pulsewidth modulation rectification circuit.
  3. A kind of 3. single-stage current type converter with series multistage switch L.C. network, it is characterised in that：This converter electricity Line structure is by input single-phase AC power, single-phase high frequency hybrid modulation switch, single-phase capacitance wave filter and single phase ac load Sequentially cascade is formed, and is in series with multiple-pole switch sense between input single-phase AC power and single-phase high frequency hybrid modulation switch Content network；The multiple-pole switch L.C. network is by energy storage inductor L0The n identical SLCS type Two-port netwerks sequentially cascaded The unit cascaded composition of L.C. network is switched, wherein n is the natural number more than 1；Each SLCS types Two-port netwerk switch L.C. network list Member, is by two four-quadrant power switch SjAnd Sj', an energy storage inductor Lj, a storage capacitor CjForm, four-quadrant power Switch SjOne end and energy storage inductor LjOne end, storage capacitor CjReference positive ends be connected, four-quadrant power switch Sj The other end, energy storage inductor LjThe other end respectively with four-quadrant power switch Sj' both ends be connected, storage capacitor CjGinseng Examine negative polarity end and the reference of the storage capacitor of same position in adjacent prime SLCS types Two-port netwerk switch L.C. network unit Positive ends are connected, four-quadrant power switch SjWith Sj' connecting pin and storage capacitor CjReference negative polarity end constitute The input port of j SLCS types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith four-quadrant power switch Sj' connection End and storage capacitor CjReference positive ends constitute the output terminal of j-th SLCS types Two-port netwerk switch L.C. network unit Mouthful, input single-phase AC power is with reference to positive polarity and storage capacitor C1Connecting pin and four-quadrant power switch S with reference to negative polarity1 With S1' connecting pin between be connected with energy storage inductor L0, wherein j is the natural number no more than n；The single-phase high frequency combination is adjusted System switch is that the four-quadrant power switch that bi-directional voltage stress and bidirectional current stress are born by two is formed, and four-quadrant power is opened Close S1〞 and S2One end of 〞 and energy storage inductor LnWith four-quadrant power switch Sn' connecting pin be connected, four-quadrant power switch S1〞 The other end be connected with the reference negative polarity end of input single-phase AC power, single-phase output filter capacitor, four-quadrant power is opened Close S2The other end of 〞 is connected with the reference positive ends of single-phase output filter capacitor.
CN201810019722.XA 2018-01-09 2018-01-09 Single-stage current type converter with series multistage switch L.C. network Withdrawn CN107994770A (en)

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CN110224589A (en) * 2019-05-14 2019-09-10 厦门银固美能源科技有限公司 Power boost device based on the series connection of multilevel energy storage unit
CN114094820A (en) * 2021-11-22 2022-02-25 核工业西南物理研究院 Capacitor energy storage type current reduction slope adjustable power supply

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110224589A (en) * 2019-05-14 2019-09-10 厦门银固美能源科技有限公司 Power boost device based on the series connection of multilevel energy storage unit
CN110224589B (en) * 2019-05-14 2024-05-28 厦门银固美能源科技有限公司 Power supply boosting device based on multistage energy storage unit series connection
CN114094820A (en) * 2021-11-22 2022-02-25 核工业西南物理研究院 Capacitor energy storage type current reduction slope adjustable power supply
CN114094820B (en) * 2021-11-22 2023-09-08 核工业西南物理研究院 Capacitor energy storage type current falling slope adjustable power supply

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