CN108134521A - Single-stage and-phase voltage source converter with series connection magnetic integrated switch L.C. network - Google Patents

Single-stage and-phase voltage source converter with series connection magnetic integrated switch L.C. network Download PDF

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Publication number
CN108134521A
CN108134521A CN201810019192.9A CN201810019192A CN108134521A CN 108134521 A CN108134521 A CN 108134521A CN 201810019192 A CN201810019192 A CN 201810019192A CN 108134521 A CN108134521 A CN 108134521A
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China
Prior art keywords
magnetic
inductance
switch
network
storage capacitor
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CN201810019192.9A
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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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Publication of CN108134521A publication Critical patent/CN108134521A/en
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Classifications

    • 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
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • 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
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation

Abstract

A kind of single-stage and-phase voltage source converter circuit structure with series connection magnetic integrated switch L.C. network, it is sequentially to be cascaded and formed by input DC power or single phase alternating current power supply, high frequency hybrid modulation switch, wave filter, single phase ac load or DC load, and magnetic integrated switch L.C. network is in series between input power and high frequency hybrid modulation switch；Magnetic integrated switch L.C. network is that L.C. network is unit cascaded forms for identical with sequentially cascade two by energy storage inductor SLCC types Two-port netwerk switch, the magnetic integrated morphology of three of them energy storage inductor is three inductance magnetic couplings, with other two inductance magnetic coupling arrangement, EE types magnetic core, four column type magnetic cores, EE type magnetic cores is respectively adopted respectively in three decouplings of inductance magnetic, an inductance.This converter can be by unstable wide variation range low-voltage DC or single-phase alternating current single-stage efficient conversion into stabilization, high-quality single-phase sinusoidal ac or direct current, suitable for Small And Medium Capacity transformation of electrical energy occasion.

Description

Single-stage and-phase voltage source converter with series connection magnetic integrated switch L.C. network
Technical field
A kind of single-stage and-phase voltage source converter with series connection magnetic integrated switch L.C. network according to the present invention, belongs to Power Electronic Technique.
Background technology
Converter is one kind by direct current or convert alternating current into alternating current or direct current using power semiconductor Static ac dc converter device is used for AC load (including generating electricity by way of merging two or more grid systems with AC network) or DC load.
Since the fossil energies such as oil, coal and natural gas (non-renewable energy resources) growing tension, environmental pollution are serious, global It warms, nuclear energy production can generate nuke rubbish and pollution reasons, the energy and the environment such as environment have become what the 21 century mankind were 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, 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, it needs to be converted into AC energy using DC-AC converters or DC-DC converter or direct current energy supplies It is used to load (including generating electricity by way of merging two or more grid systems with AC network)；The AC energy of the renewable energy conversions such as wind energy is typically to become buckling The alternating current of frequency needs to be converted into direct current energy for load use (such as inverter load) using AC-DC converter；Exchange The unstable alternating current that the primary power sources such as generator generate needs to be converted into the friendship of same frequency constant pressure using AC-AC converters Galvanic electricity can supply AC load use.With dc generator, accumulator, solar cell, fuel cell, wind energy conversion system, exchange Generator etc. is main direct current, the transformation occasion of main AC power, inverter, DC converter, rectifier and exchange conversion utensil Have wide practical use.
At present, Small And Medium Capacity DC-AC converts the traditional Single-phase Voltage PWM Inverter circuit structure of occasion generally use. It must satisfy the peak value that DC voltage is more than exchange side phase voltage during this kind of inverter normal work, thus it is apparent there are one Defect：When DC voltage (such as photovoltaic cell fan-out capability) reduces, such as rainy days or night, entire electricity generation system will be difficult to Normal operation, the utilization rate of system decline.In this regard, it is solved frequently with the following two kinds method：(1) prime adds Boost type direct current Converter or high-frequency isolation type DC-DC converter, increase power conversion series, circuit complexity, loss and cost；(2) it is defeated Go out to add single phase industrial frequence transformer, considerably increase the volume, weight and cost of system, it is difficult to adapt to the copper and iron prices of raw materials drastically Today of rise.
At present, it is generally also to use traditional pwm converter circuit that Small And Medium Capacity DC-DC, AC-DC, AC-AC, which converts occasion, Structure, equally exist bridge arm power device need to set dead zone or overlapping time, reliability and output waveform quality is low, step-up ratio not The defects of volume weight big and of high cost (input or output plus single phase industrial frequence transformer) of enough big (non-isolation type), system.
Therefore, seek a kind of bridge arm need not set dead time, high power density, high reliability, single stage circuit structure it is new Single-stage and-phase voltage source converter of the type with series connection magnetic integrated switch L.C. network is extremely urgent.This for efficiently against Bridge arm existing for traditional pwm converter must set dead time, step-up ratio not big enough (non-isolation type), system volume weight it is big and The defects of (input or output plus single phase industrial frequence transformer) of high cost, improve the output waveform quality of transformation system, reliability and Input side EMI is reduced, widens power electronics converter technique and renewable energy power generation technical know-how, pushes generation of electricity by new energy production The development and development of industry are energy-saving to be respectively provided with important meaning with conservation-minded society.
Invention content
It is a kind of with big step-up ratio, single-stage power conversion, power density height, conversion efficiency the invention aims to provide It is high, output waveform quality is high, reliability is high, change range of input voltage is wide, it is at low cost, suitable for Small And Medium Capacity transformation occasion etc. The single-stage and-phase voltage source converter with series connection magnetic integrated switch L.C. network of feature.
Technical scheme of the present invention 1 is：A kind of single-stage and-phase voltage-type with series connection magnetic integrated switch L.C. network Converter is sequentially cascaded by input DC power, single-phase high frequency hybrid modulation switch, single phase filter and single phase ac load It forms, and magnetic integrated switch L.C. network is in series between input DC power and single-phase high frequency hybrid modulation switch；Institute The magnetic integrated switch L.C. network stated is by energy storage inductor L0Sequentially cascade two identical SLCC types Two-port netwerk switch senses The unit cascaded composition of content network；Each SLCC types Two-port netwerk switch L.C. network unit is by a power diode Sj, one Energy storage inductor Lj, two storage capacitor CjAnd Cj' form, power diode SjCathode and energy storage inductor LjOne end, energy storage electricity Hold CjPositive ends be connected, energy storage inductor LjThe other end and storage capacitor Cj' positive ends be connected, two pole of power Pipe SjAnode and storage capacitor Cj' negative polarity end be connected, storage capacitor C2Negative polarity end and two end of first order SLCC types The storage capacitor C of mouth switch L.C. network unit1Positive ends be connected, power diode SjWith storage capacitor Cj' connection End and storage capacitor CjNegative polarity end constitute the input port of j-th SLCC types Two-port netwerk switch L.C. network unit, storage It can inductance LjWith storage capacitor Cj' connecting pin and storage capacitor CjPositive ends constitute j-th SLCC types Two-port netwerk switch The output port of L.C. network unit, input DC power positive polarity and storage capacitor C1Two pole of connecting pin and power of negative polarity Pipe S1With storage capacitor C1' connecting pin between be connected with energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin and The positive pole line end of single-phase high frequency hybrid modulation switch is connected, wherein j=1,2；The single-phase high frequency hybrid modulation switchs The two quadrant power switch that unidirectional voltage stress and bidirectional current stress are born by four are formed；The magnetic integrated switch LC net Three energy storage inductor L in network0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance point Not with other two inductance magnetic coupling arrangement, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Institute The three inductance magnetic coupling arrangements stated use EE type magnetic cores, and three inductance coils are wound on (such as iron on the center pillar of magnetic core air-gap-free Ferrite core) or have on the center pillar of air gap (such as powder core magnetic core), and magnetic core has on two side columns of air gap without winding, mutual inductance M01 =M12=M20；Three inductance magnetic decoupling-structures use four column type magnetic cores, and three inductance coils have gas rotating around in magnetic core On three columns of gap, and air-gap-free and without winding, mutual inductance M on the 4th column of magnetic core01=M12=M20=0；One inductance Respectively with other two inductance magnetic coupling arrangement using EE type magnetic cores, inductance coil N1Half and inductance coil N0It is wound on magnetic core Have on a side column of air gap, inductance coil N1The other half and inductance coil N2Being wound on magnetic core has on another side column of air gap, And without winding (such as FERRITE CORE) or have on the center pillar of air gap without winding (such as powder core magnetic core) on the center pillar of magnetic core air-gap-free, Mutual inductance M01=M12>>M20。
Technical scheme of the present invention 2 is：A kind of single-stage and-phase voltage-type with series connection magnetic integrated switch L.C. network Converter is sequentially cascaded and is formed by input DC power, high frequency hybrid modulation switch, wave filter and DC load, and Magnetic integrated switch L.C. network is in series between input DC power and high frequency hybrid modulation switch；The magnetic integrated switch sense Content network is by energy storage inductor L0The sequentially cascade two identical SLCC types Two-port netwerk switch unit cascaded structures of L.C. network Into；Each SLCC types Two-port netwerk switch L.C. network unit is by a power diode Sj, an energy storage inductor Lj, two storages It can capacitance CjAnd Cj' form, power diode SjCathode and energy storage inductor LjOne end, storage capacitor CjPositive ends be connected It connects, energy storage inductor LjThe other end and storage capacitor Cj' positive ends be connected, power diode SjAnode and energy storage electricity Hold Cj' negative polarity end be connected, storage capacitor C2Negative polarity end and first order SLCC types Two-port netwerk switch L.C. network unit Storage capacitor C1Positive ends be connected, power diode SjWith storage capacitor Cj' connecting pin and storage capacitor CjIt is negative Polar end constitutes the input port of j-th of SLCC types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith storage capacitor Cj' connecting pin and storage capacitor CjPositive ends constitute the output of j-th SLCC types Two-port netwerk switch L.C. network unit Port, input DC power positive polarity and storage capacitor C1The connecting pin of negative polarity and power diode S1With storage capacitor C1' Energy storage inductor L is connected between connecting pin0, energy storage inductor L2With storage capacitor C2' connecting pin and high frequency hybrid modulation switch Positive pole line end is connected, wherein j=1,2；Described high frequency hybrid modulation switch is to bear unidirectional voltage stress and double by one It is formed to two quadrant power switch of current stress；Three energy storage inductor L in the magnetic integrated switch L.C. network0、L1、L2's Magnetic integrated morphology is three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling knot Structure, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Three inductance magnetic coupling arrangements are adopted With EE type magnetic cores, three inductance coils are wound on magnetic core air-gap-free or have on the center pillar of air gap, and magnetic core has two sides of air gap Without winding, mutual inductance M on column01=M12=M20；Three inductance magnetic decoupling-structures use four column type magnetic cores, three inductor wires Circle has rotating around in magnetic core on three columns of air gap, and air-gap-free and without winding, mutual inductance M on the 4th column of magnetic core01=M12=M20 =0；One inductance is respectively with other two inductance magnetic coupling arrangement using EE type magnetic cores, inductance coil N1Half and Inductance coil N0Being wound on magnetic core has on a side column of air gap, inductance coil N1The other half and inductance coil N2Being wound on magnetic core has On another side column of air gap, and magnetic core air-gap-free or have on the center pillar of air gap without winding, mutual inductance M01=M12>>M20。
Technical scheme of the present invention 3 is：A kind of single-stage and-phase voltage-type with series connection magnetic integrated switch L.C. network Converter is sequentially to cascade structure by input single-phase AC power, single-phase high frequency hybrid modulation switch, wave filter and DC load Into, and it is in series with magnetic integrated switch L.C. network between input single-phase AC power and single-phase high frequency hybrid modulation switch； The magnetic integrated switch L.C. network is by energy storage inductor L0Sequentially cascade two identical SLCC types Two-port netwerk switches The unit cascaded composition of L.C. network；Each SLCC types Two-port netwerk switch L.C. network unit is by a four-quadrant power switch Sj, an energy storage inductor Lj, two storage capacitor CjAnd Cj' form, four-quadrant power switch SjOne end and energy storage inductor Lj's One end, storage capacitor CjReference positive ends be connected, energy storage inductor LjThe other end and storage capacitor Cj' reference anode Property end is connected, four-quadrant power switch SjThe other end and storage capacitor Cj' reference negative polarity end be connected, storage capacitor C2Reference negative polarity end and the first order SLCC types Two-port netwerk switch L.C. network unit storage capacitor C1Reference positive ends It is connected, four-quadrant power switch SjWith storage capacitor Cj' connecting pin and storage capacitor CjReference negative polarity end constitute The input port of j SLCC types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith storage capacitor Cj' connecting pin and storage It can capacitance CjReference positive ends constitute the output port of j-th SLCC types Two-port netwerk switch L.C. network unit, input Single-phase alternating current source reference positive polarity and storage capacitor C1With reference to the connecting pin of negative polarity and four-quadrant power switch S1With energy storage electricity Hold C1' connecting pin between be connected with energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin and single-phase high frequency group The reference positive pole line end for closing modulation switch is connected, wherein j=1,2；The single-phase high frequency hybrid modulation switch is by four The two quadrant power switch for bearing unidirectional voltage stress and bidirectional current stress are formed；Three in the magnetic integrated switch L.C. network A energy storage inductor L0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with its Remaining two inductance magnetic coupling arrangements, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Described three A inductance magnetic coupling arrangement uses EE type magnetic cores, and three inductance coils are wound on magnetic core air-gap-free or have on the center pillar of air gap, and Magnetic core has on two side columns of air gap without winding, mutual inductance M01=M12=M20；Three inductance magnetic decoupling-structures use four columns Type magnetic core, three inductance coils have rotating around in magnetic core on three columns of air gap, and on the 4th column of magnetic core air-gap-free and without around Group, mutual inductance M01=M12=M20=0；One inductance uses EE type magnetic cores with other two inductance magnetic coupling arrangement respectively, Inductance coil N1Half and inductance coil N0Being wound on magnetic core has on a side column of air gap, inductance coil N1The other half and electricity Feel coil N2Being wound on magnetic core has on another side column of air gap, and magnetic core air-gap-free or has on the center pillar of air gap without winding, mutual inductance M01=M12>>M20。
Technical scheme of the present invention 4 is：A kind of single-stage and-phase voltage-type with series connection magnetic integrated switch L.C. network Converter is loaded sequentially by input single-phase AC power, single-phase high frequency hybrid modulation switch, single phase filter and single phase ac Cascade is formed, and is in series with magnetic integrated switch LC between input single-phase AC power and single-phase high frequency hybrid modulation switch Network；The magnetic integrated switch L.C. network is by energy storage inductor L0Sequentially cascade two identical SLCC type Two-port netwerks Switch the unit cascaded composition of L.C. network；Each SLCC types Two-port netwerk switch L.C. network unit is opened by a four-quadrant power Close Sj, an energy storage inductor Lj, two storage capacitor CjAnd Cj' form, four-quadrant power switch SjOne end and energy storage inductor Lj One end, storage capacitor CjReference positive ends be connected, energy storage inductor LjThe other end and storage capacitor Cj' reference just Polar end is connected, four-quadrant power switch SjThe other end and storage capacitor Cj' reference negative polarity end be connected, energy storage electricity Hold C2Reference negative polarity end and the first order SLCC types Two-port netwerk switch L.C. network unit storage capacitor C1Reference positive polarity End is connected, four-quadrant power switch SjWith storage capacitor Cj' connecting pin and storage capacitor CjReference negative polarity end constitute The input port of j-th of SLCC types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith storage capacitor Cj' connecting pin and Storage capacitor CjReference positive ends constitute the output port of j-th SLCC types Two-port netwerk switch L.C. network unit, it is defeated Enter single-phase alternating current source reference positive polarity and storage capacitor C1With reference to the connecting pin of negative polarity and four-quadrant power switch S1With energy storage Capacitance C1' connecting pin between be connected with energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin and single-phase high frequency The reference positive pole line end of hybrid modulation switch is connected, wherein j=1,2；The single-phase high frequency hybrid modulation switch is by one A four-quadrant power switch composition for bearing bi-directional voltage stress and bidirectional current stress；In the magnetic integrated switch L.C. network Three energy storage inductor L0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with Other two inductance magnetic coupling arrangement, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Described Three inductance magnetic coupling arrangements are wound on magnetic core air-gap-free or are had on the center pillar of air gap using EE type magnetic cores, three inductance coils, And magnetic core has on two side columns of air gap without winding, mutual inductance M01=M12=M20；Three inductance magnetic decoupling-structures use four Column type magnetic core, three inductance coils have rotating around in magnetic core on three columns of air gap, and air-gap-free and nothing on the 4th column of magnetic core Winding, mutual inductance M01=M12=M20=0；One inductance uses EE type magnetic with other two inductance magnetic coupling arrangement respectively Core, inductance coil N1Half and inductance coil N0Being wound on magnetic core has on a side column of air gap, inductance coil N1The other half and Inductance coil N2Being wound on magnetic core has on another side column of air gap, and magnetic core air-gap-free or has on the center pillar of air gap without winding, mutually Feel M01=M12>>M20。
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 magnetic collection The single-stage electricity formed into switch L.C. network with sequentially cascade (single-phase) high frequency hybrid modulation switch, (single-phase) filters in series Line structure " has been put forward for the first time single-stage and-phase voltage source converter new concept and electricity with series connection magnetic integrated switch L.C. network Line structure switchs L.C. network unit by providing sequentially cascade two identical SLCC types Two-port netwerks, utilizes the first order The output of SLCC types Two-port netwerk switch L.C. network unit comes as the input of second level SLCC types Two-port netwerk switch L.C. network The step-up ratio of converter is improved, three energy storage inductor L in magnetic integrated switch L.C. network0、L1、L2Magnetic integrated morphology be three Inductance magnetic coupling, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement.By increasing SLCC types The duty ratio D that magnetizes of the sum of series converter energy storage inductor of Two-port netwerk switch L.C. network unit0=T0/TSTo realize converter The adjusting of step-up ratio, wherein TSFor HF switch cycle time, T0It is switched for (single-phase) high frequency hybrid modulation in a TSAn interior left side Bridge arm or right bridge arm direct pass time (being converted for DC-AC), turn-on time (being converted for DC-DC, AC-AC), lower bridge arm or on The common turn-on time of bridge arm (converts AC-DC).
The advantage of the invention is that：The present invention can be by unstable wide variation range low-voltage DC or single-phase alternating current list Grade is transformed into stable, good single-phase sinusoidal ac or direct current, has single-stage power conversion, power density height, transformation effect The advantages that rate is high, step-up ratio is big, three energy storage inductor magnetic integrate, output waveform quality is high, reliability is high, at low cost, is suitable for Small And Medium Capacity DC-AC, DC-DC, AC-DC and AC-AC transformation of electrical energy occasion.
Description of the drawings
Fig. 1 have the single-stage and-phase voltage-type direct-current-alternating-current converter circuit knot of series connection magnetic integrated switch L.C. network Structure.
Fig. 2 have the single-stage and-phase voltage-type direct-current-alternating-current converter principle wave of series connection magnetic integrated switch L.C. network Shape.
Fig. 3 have the single-stage and-phase voltage-type direct-current-alternating-current converter circuit topology of series connection magnetic integrated switch L.C. network Example.
Fig. 4 have the single-stage and-phase voltage-type direct-current-alternating-current converter energy storage inductor of series connection magnetic integrated switch L.C. network The D during bridge arm direct pass0TSThe equivalent circuit that magnetizes.
Fig. 5 have the single-stage and-phase voltage-type direct-current-alternating-current converter energy storage inductor of series connection magnetic integrated switch L.C. network In the non-straight-through period (1-D of bridge arm0)TSAnd the magnetic equivalent circuit of dispelling during lower bridge arm conducting.
Fig. 6 have the single-stage and-phase voltage-type direct-current-alternating-current converter energy storage inductor of series connection magnetic integrated switch L.C. network In the non-straight-through period (1-D of bridge arm0)TSAnd the magnetic equivalent circuit of dispelling during output voltage negative half period.
Fig. 7 have the single-stage and-phase voltage-type direct-current-alternating-current converter energy storage inductor of series connection magnetic integrated switch L.C. network In the non-straight-through period (1-D of bridge arm0)TSAnd the magnetic equivalent circuit of dispelling during output voltage positive half cycle.
Fig. 8 have the single-stage and-phase voltage-type direct-current-alternating-current converter energy storage inductor of series connection magnetic integrated switch L.C. network In the non-straight-through period (1-D of bridge arm0)TSAnd the magnetic equivalent circuit of the dispelling during conducting of upper bridge arm.
Three energy storage inductor L in Fig. 9 magnetic integrated switch L.C. networks0、L1、L2Magnetic coupling arrangement.
Three energy storage inductor L in Figure 10 magnetic integrated switch L.C. networks0、L1、L2Magnetic decoupling-structure.
Energy storage inductor L in Figure 11 magnetic integrated switch L.C. networks1Respectively with energy storage inductor L0、L2Magnetic coupling arrangement.
Figure 12 have the single-stage and-phase voltage-type direct-current-alternating-current converter control original of series connection magnetic integrated switch L.C. network Manage block diagram.
Figure 13 have the single-stage and-phase voltage-type direct-current-alternating-current converter control original of series connection magnetic integrated switch L.C. network Manage waveform.
Figure 14 have the circuit of the single-stage and-phase voltage-type DC-DC converter of series connection magnetic integrated switch L.C. network Structure.
Figure 15 have the principle of the single-stage and-phase voltage-type DC-DC converter of series connection magnetic integrated switch L.C. network Waveform.
Figure 16 have the circuit of the single-stage and-phase voltage-type DC-DC converter of series connection magnetic integrated switch L.C. network Topology example.
Figure 17 have the single-stage and-phase voltage-type DC-DC converter energy storage electricity of series connection magnetic integrated switch L.C. network Sense D during high frequency hybrid modulation switch conduction0TSThe equivalent circuit that magnetizes.
Figure 18 have the single-stage and-phase voltage-type DC-DC converter energy storage electricity of series connection magnetic integrated switch L.C. network Sense (1-D during the switch cut-off of high frequency hybrid modulation0)TSMagnetic equivalent circuit of dispelling.
Figure 19 have the single-stage and-phase voltage-type DC-DC converter control original of series connection magnetic integrated switch L.C. network Manage block diagram.
Figure 20 have the single-stage and-phase voltage-type DC-DC converter control original of series connection magnetic integrated switch L.C. network Manage waveform.
Figure 21 have the circuit of the single-stage and-phase voltage-type A.C.-D.C. converter of series connection magnetic integrated switch L.C. network Structure.
Figure 22 have the principle of the single-stage and-phase voltage-type A.C.-D.C. converter of series connection magnetic integrated switch L.C. network Waveform.
Figure 23 have the circuit of the single-stage and-phase voltage-type A.C.-D.C. converter of series connection magnetic integrated switch L.C. network Topology example.
Figure 24 have the single-stage and-phase voltage-type A.C.-D.C. converter energy storage electricity of series connection magnetic integrated switch L.C. network Sense D during lower bridge arm is connected0TSAnd the equivalent circuit that magnetizes during input voltage positive half cycle.
Figure 25 have the single-stage and-phase voltage-type A.C.-D.C. converter energy storage electricity of series connection magnetic integrated switch L.C. network Sense (1-D during bridge arm cross-conduction0)TSAnd the magnetic equivalent circuit of dispelling during input voltage positive half cycle.
Figure 26 have the single-stage and-phase voltage-type A.C.-D.C. converter energy storage electricity of series connection magnetic integrated switch L.C. network Sense D during lower bridge arm is connected0TSAnd the equivalent circuit that magnetizes during input voltage negative half period.
Figure 27 have the single-stage and-phase voltage-type A.C.-D.C. converter energy storage electricity of series connection magnetic integrated switch L.C. network Sense (1-D during bridge arm cross-conduction0)TSAnd the magnetic equivalent circuit of dispelling during input voltage negative half period.
Figure 28 have the single-stage and-phase voltage-type A.C.-D.C. converter control original of series connection magnetic integrated switch L.C. network Manage block diagram.
Figure 29 have the single-stage and-phase voltage-type A.C.-D.C. converter control original of series connection magnetic integrated switch L.C. network Manage waveform.
Figure 30 have the circuit of the single-stage and-phase voltage-type ac-to-ac converter of series connection magnetic integrated switch L.C. network Structure.
Figure 31 have the principle of the single-stage and-phase voltage-type ac-to-ac converter of series connection magnetic integrated switch L.C. network Waveform.
Figure 32 have the circuit of the single-stage and-phase voltage-type ac-to-ac converter of series connection magnetic integrated switch L.C. network Topology example.
Figure 33 have the single-stage and-phase voltage-type ac-to-ac converter energy storage electricity of series connection magnetic integrated switch L.C. network Sense D during high frequency hybrid modulation switch conduction0TSAnd the equivalent circuit that magnetizes during input voltage positive half cycle.
Figure 34 have the single-stage and-phase voltage-type ac-to-ac converter energy storage electricity of series connection magnetic integrated switch L.C. network Sense (1-D during the switch cut-off of high frequency hybrid modulation0)TSAnd the magnetic equivalent circuit of dispelling during input voltage positive half cycle.
Figure 35 have the single-stage and-phase voltage-type ac-to-ac converter energy storage electricity of series connection magnetic integrated switch L.C. network Sense D during high frequency hybrid modulation switch conduction0TSAnd the equivalent circuit that magnetizes during input voltage negative half period.
Figure 36 have the single-stage and-phase voltage-type ac-to-ac converter energy storage electricity of series connection magnetic integrated switch L.C. network Sense (1-D during the switch cut-off of high frequency hybrid modulation0)TSAnd the magnetic equivalent circuit of dispelling during input voltage negative half period.
Figure 37 have the single-stage and-phase voltage-type ac-to-ac converter control original of series connection magnetic integrated switch L.C. network Manage block diagram.
Figure 38 have the single-stage and-phase voltage-type ac-to-ac converter control original of series connection magnetic integrated switch L.C. network Manage waveform.
Specific embodiment：
Technical scheme of the present invention 1 is described further with reference to the accompanying drawings and embodiments.
Single-stage and-phase voltage-type direct-current-alternating-current converter with series connection magnetic integrated switch L.C. network is straight by inputting Sequentially cascade is formed, and straight in input for galvanic electricity source, single-phase high frequency hybrid modulation switch, single phase filter and single phase ac load Magnetic integrated switch L.C. network is in series between galvanic electricity source and single-phase high frequency hybrid modulation switch；The magnetic integrated switch LC Network is by energy storage inductor L0The sequentially cascade two identical SLCC types Two-port netwerk switch unit cascaded compositions of L.C. network； Each SLCC types Two-port netwerk switch L.C. network unit is by a power diode Sj, an energy storage inductor Lj, two energy storage electricity Hold CjAnd Cj' form, power diode SjCathode and energy storage inductor LjOne end, storage capacitor CjPositive ends be connected, Energy storage inductor LjThe other end and storage capacitor Cj' positive ends be connected, power diode SjAnode and storage capacitor Cj' negative polarity end be connected, storage capacitor C2Negative polarity end and first order SLCC types Two-port netwerk switch L.C. network unit Storage capacitor C1Positive ends be connected, power diode SjWith storage capacitor Cj' connecting pin and storage capacitor CjCathode Property end constitute the input port of j-th SLCC types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith storage capacitor Cj′ Connecting pin and storage capacitor CjPositive ends constitute the output terminal of j-th SLCC types Two-port netwerk switch L.C. network unit Mouthful, input DC power positive polarity and storage capacitor C1The connecting pin of negative polarity and power diode S1With storage capacitor C1' company It connects and is connected with energy storage inductor L between holding0, energy storage inductor L2With storage capacitor C2' connecting pin and single-phase high frequency hybrid modulation switch Positive pole line end be connected, wherein j=1,2；The single-phase high frequency hybrid modulation switch is to bear unidirectional voltage by four to answer Two quadrant power switch of power and bidirectional current stress are formed；Three energy storage inductor L in the magnetic integrated switch L.C. network0、 L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic Coupled structure, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Three inductance magnetic couplings Structure uses EE type magnetic cores, three inductance coils are wound on the center pillar of magnetic core air-gap-free (such as FERRITE CORE) or have air gap On center pillar (such as powder core magnetic core), and magnetic core has on two side columns of air gap without winding, mutual inductance M01=M12=M20；Described three A inductance magnetic decoupling-structure uses four column type magnetic cores, and three inductance coils have rotating around in magnetic core on three columns of air gap, and magnetic Air-gap-free and without winding, mutual inductance M on the 4th column of core01=M12=M20=0；One inductance is electric with other two respectively Magnetic coupling arrangement is felt using EE type magnetic cores, inductance coil N1Half and inductance coil N0Being wound on magnetic core has a side column of air gap On, inductance coil N1The other half and inductance coil N2Being wound on magnetic core has on another side column of air gap, and in magnetic core air-gap-free Without winding (such as FERRITE CORE) or have on the center pillar of air gap without winding (such as powder core magnetic core), mutual inductance M on column01=M12>>M20。
Single-stage and-phase voltage-type direct-current-alternating-current converter circuit structure and original with series connection magnetic integrated switch L.C. network Waveform is managed, respectively as shown in Figure 1, 2.In Fig. 1,2, UiFor input direct-current voltage, ZLIt is single-phase output AC load (including single-phase AC passive loads and the load of single phase ac power grid), uo、ioRespectively single-phase output alternating voltage and alternating current.Magnetic integrates out It is by energy storage inductor L to close L.C. network0Sequentially cascade two identical SLCC types Two-port netwerk switch L.C. network cell levels Connection is formed, and each SLCC types Two-port netwerk switch L.C. network unit is by a power diode Sj, an energy storage inductor Lj, two A storage capacitor CjAnd Cj' form, three energy storage inductor L in magnetic integrated switch L.C. network0、L1、L2Magnetic integrated morphology be three A inductance magnetic coupling, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement；Single-phase high frequency combines Modulation switch, i.e. half-bridge converter are the two quadrant power switch that can bear unidirectional voltage stress and bidirectional current stress by four It forms；Single phase filter is single-phase LC wave filters (during single phase ac passive load) or single-phase LCL filter (single phase ac power grid During load)；Input DC power UiInput filter can be set or is not provided between magnetic integrated switch L.C. network, and setting is defeated The pulsation of input direct-current electric current can be reduced when entering wave filter.When a bridge of single-phase high frequency hybrid modulation switch (half-bridge converter) When arm is led directly to, input DC power UiWith all storage capacitors to energy storage inductor L0、L1、L2It magnetizes, single-phase output AC load It maintains to power by single phase filter；When single-phase high frequency hybrid modulation switchs (half-bridge converter) bridge arm switch cross conduction, Energy storage inductor L0、L1、L2Dispel magnetic and with input DC power UiCooperatively supplied to all storage capacitors, single phase ac load Electricity.Magnetic integrated switch L.C. network and single-phase high frequency hybrid modulation switch (half-bridge converter) by input direct-current voltage UiIt is modulated into The high frequency pulse dc voltage u that amplitude is changed by twice of output frequency sinusoidal envelope line gauge rule1, single-phase high frequency hybrid modulation switch (half-bridge converter) is by u1It is reverse into the tri-state modulation voltage wave u that pulsewidth is changed by sinusoidal rule2, single-phase after single-phase filtering The single-phase sinusoidal voltage u of high quality is obtained in AC passive loadoOr the list of high quality is obtained in the load of single phase ac power grid Phase sinusoidal current io。
The single-stage and-phase voltage-type DC-AC conversion with series connection magnetic integrated switch L.C. network of the present invention Device is to utilize sequentially cascade two identical SLCC types Two-port netwerk switch L.C. network units, and first order Two-port netwerk switch The output of L.C. network unit for second level Two-port netwerk switch L.C. network unit input come improve converter boost than list Grade circuit structure, with single-stage and-phase voltage type PWM direct-current-alternating-current converter or multi-stage cascade PWM direct-current-alternating-current converter circuits There is differences substantially for structure.Therefore, single-stage and-phase direct-current-alternating-current converter of the present invention has novelty and wound The property made, and with conversion efficiency high (meaning that energy loss is small), power density high (meaning that volume, weight are small), boosting Than it is big (mean the wider or lower input direct-current voltage of variation range can be transformed into required single-phase output alternating voltage or Alternating current), three energy storage inductor magnetic integrate, the output waveform distortion factor is low, reliability is high, at low cost, application prospect extensively etc. Advantage is a kind of ideal energy-saving type single-phase DC-AC converter, energy-saving, economizing type society is built vigorously advocating Today of meeting has more important value.
Single-stage and-phase voltage-type direct-current-alternating-current converter circuit topology with series connection magnetic integrated switch L.C. network is implemented Example, as shown in Figure 3.What Fig. 3 was provided is single-phase LC filter circuits, is not provided as space is limited suitable for being wanted to output waveform quality Seek higher single-phase LCL filter circuit；Single-phase high frequency hybrid modulation switch (half-bridge converter) selects MOSFET element, also may be used Select the devices such as IGBT, GTR.The direct-current-alternating-current converter can be by a kind of unstable low-voltage DC (such as accumulator, light Volt battery, fuel cell, wind energy conversion system etc.) it is transformed into required stabilization, high-quality, high pressure single-phase sinusoidal ac, extensive use In Small And Medium Capacity, civilian industry Single-Phase Inverter Source (such as communication inverter and the photovoltaic combining inverter 24VDC/ of occasion of boosting 220V50HzAC, 48VDC/220V50HzAC, 96VDC/220V50HzAC) and (the static change of such as aviation of national defense industry inverter Flow device 27VDC/115V400HzAC) etc..
Each energy storage electricity of single-stage and-phase voltage-type direct-current-alternating-current converter with series connection magnetic integrated switch L.C. network Sense is in a HF switch cycle TSThe magnetic that inside magnetizes and dispel is each primary, D during corresponding bridge arm direct pass during magnetizing0TS, and dispel the magnetic phase Between correspond to the non-straight-through period (1-D of bridge arm0)TS(including to two zero vector phases outer during exchange side output energy, bridge arm direct pass Between).Direct-current-alternating-current converter energy storage inductor D during bridge arm direct pass0TSThe equivalent circuit that magnetizes, the bridge arm non-straight-through phase Between (1-D0)TSAnd the equivalent electricity of magnetic of dispelling when lower bridge arm conducting, output voltage negative half period, output voltage positive half cycle and the conducting of upper bridge arm Road, respectively as shown in Fig. 4,5,6,7,8.In Fig. 4,5,6,7,8, output voltage uoPolarity for reference direction, and each electric current pole Property is actual direction.
If storage capacitor terminal voltage is in a HF switch cycle TSIt is inside invariable, uses UC1、UC2、U′c1、U′c2Table Show.Energy storage inductor D during bridge arm direct pass as shown in Figure 40TSThe equivalent circuit that magnetizes can obtain,
Energy storage inductor is in the non-straight-through period (1-D of bridge arm as shown in Fig. 5,6,7,80)TSAnd lower bridge arm conducting, output voltage are born Magnetic equivalent circuit of dispelling when half cycle, output voltage positive half cycle and upper bridge arm are connected can obtain,
If the voltage magnitude of single-phase high frequency hybrid modulation switch (half-bridge converter) DC side is U1, can must supplement equation
Ui+UC1+U′C1+U′C2=U1 (3.1)
Ui+UC1+UC2+U′C2=U1 (3.2)
According to State-space Averaging Principle, formula (1) × D0+ formula (2) × (1-D0), it enablesAssociation type (3), magnetic integrated switch L.C. network storage capacitor voltage value UC1、UC2、U′c1、U′c2For
Single-phase high frequency hybrid modulation switchs the voltage magnitude U of (half-bridge converter) DC side1For
In formula (5), 3D0＜ 1, i.e. D0＜ 1/3.If the index of modulation of single-phase high frequency hybrid modulation switch (half-bridge converter) For M (0 ＜ M≤1-D0), then there is the single-stage and-phase voltage-type direct-current-alternating-current converter of series connection magnetic integrated switch L.C. network Voltage transfer ratio is
By formula (6) it is found that the voltage transfer ratio of the single-stage and-phase direct-current-alternating-current converter is more than traditional single stage voltage-type The voltage transfer ratio M of PWM direct-current-alternating-current converters, and in different M and D0During value voltage transfer ratio exist be less than, be equal to and More than 1 three kinds situations.As M ＞ 1-3D0When, the voltage transfer ratio of the converter is more than 1, so as to embody its superiority, this The big step-up ratio of kind converter is realized by increasing the unit series of magnetic integrated switch L.C. network.
Three energy storage inductor L in the L.C. network of magnetic integrated switch shown in Fig. 30、L1、L2Magnetic integrated morphology be three inductance Magnetic coupling, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement, such as Fig. 9,10,11 and 1 institute of table Show.
1 three kinds of magnetic integrated morphology project plan comparisons of table
Three energy storage inductor L shown in Fig. 90、L1、L2Magnetic coupling arrangement is using the realization of EE types magnetic core, three energy storage inductor coils N0、N1、N2It is wound on the center pillar of magnetic core air-gap-free (such as FERRITE CORE) or has on the center pillar of air gap (such as powder core magnetic core), And magnetic core has on two side columns of air gap without winding, three energy storage inductor coil N0、N1、N2In electric current iL0、iL1、iL2It generates Magnetic flux ΨL0、ΨL1、ΨL2It is Ψ, center pillar magnetic flux is 3 Ψ, and two side column magnetic fluxes are 3 Ψ/2, three energy storage inductors L0、L1、L2Between mutual inductance M01=M12=M20.It is obtained by formula (4)
Have at this time
uab=ucd=uef=u (8)
It considers
Due to L0=L1=L2=L, M01=M12=M20=M, so having
Equivalent inductance is
L0eq=L1eq=L2eq=L+2M (11)
It enablesThen k01=k12=k20=k, has
L0eq=L1eq=L2eq=L (1+2k) (12)
Due to 0<k<1, then have
L0eq=L1eq=L2eq=L (1+2k) ＞ L (13)
Three energy storage inductor L shown in Figure 100、L1、L2Magnetic decoupling-structure is using the realization of four column type magnetic cores, three energy storage inductors Coil N0、N1、N2Have on three columns of air gap rotating around in magnetic core, and air-gap-free and without winding on the 4th column of magnetic core, three storages It can inductance coil N0、N1、N2In electric current iL0、iL1、iL2The magnetic flux Ψ of generationL0、ΨL1、ΨL2It is Ψ, three have air gap column It is Ψ, three energy storage inductor L with the magnetic flux on the 4th air-gap-free column0、L1、L2Between magnetic decoupling i.e. three energy storage inductors Mutual inductance M01=M12=M20=0.So sensibility reciprocal is constant, the equivalent inductance amount of three energy storage inductors is still respectively L0、L1、L2。
Energy storage inductor L shown in Figure 111Respectively with energy storage inductor L0、L2Magnetic coupling arrangement realizes that energy storage is electric using EE types magnetic core Feel coil N1Half and energy storage inductor coil N0Being wound on magnetic core has on a side column of air gap, energy storage inductor coil N1It is another Half and energy storage inductor coil N2Being wound on magnetic core has on another side column of air gap, and without winding (such as iron on magnetic core air-gap-free center pillar Ferrite core) or have on air gap center pillar without winding (such as powder core magnetic core), three energy storage inductor coil N0、N1、N2In electric current iL0、iL1、iL2The magnetic flux Ψ of generationL0、ΨL1、ΨL2, two magnetic flux Ψ having on the side column of air gapL0+ΨL1With ΨL1+ΨL2 Equal, magnetic flux is zero on center pillar, three energy storage inductor L0、L1、L2Between mutual inductance M01=M12>>M20, for center pillar air-gap-free The magnetic cores such as ferrite, M20≈0.By formula (8), (9), it is contemplated that L0=L2,M01=M12, thenAfter abbreviation
It solves
Three energy storage inductor L0、L1、L2Equivalent inductance be respectively
Enable the coefficient of coupThen
Enable formula (17.1) ＞ L0, formula (17.2) ＞ L1, obtain
So k01Value be
Work as M20=0, i.e. k20When=0
If N0=N1=N2, i.e. L0=L2=2L1, then
Single-stage and-phase voltage-type direct-current-alternating-current converter with series connection magnetic integrated switch L.C. network only has single stage power Transform part, control system need to realize the storage capacitor voltage of magnetic integrated switch L.C. network and output voltage (grid-connected electricity Stream) control, when supplying power for photovoltaic cell also needs to realize the MPPT maximum power point tracking control MPPT of photovoltaic cell.Therefore, it is this Single-stage and-phase direct-current-alternating-current converter uses the output electricity with magnetic integrated switch L.C. network storage capacitor voltage feedforward control (grid-connected current) instantaneous values feedback Unipolar SPWM control strategy is pressed, as shown in Figure 12,13.Output voltage uo(grid-connected current io) Instantaneous values feedback Unipolar SPWM control strategy is used for adjusting the modulation ratio M of transformation system, and magnetic integrated switch L.C. network stores up It can capacitance voltage UC2Feed-forward Control Strategy is used for adjusting the straight-through duty ratio D of transformation system0.Output voltage feedback signal uofWith base Quasi- voltage urSignal u is obtained after comparison, error amplificatione(characterization Sine Modulated is than signal M), storage capacitor voltage feedback signal UC2f With storage capacitor voltage reference signal UC2rSignal u is obtained after comparison, error amplificationd(the straight-through duty cycle signals D of characterization0)；ue、ud And its inversion signal respectively with triangular carrier ucFriendship is cut and output single-phase high frequency hybrid modulation is opened after appropriate logic circuit Close (half-bridge converter) S1′、S3′、S2′、S4' control signal.As input voltage UiDuring variation, believed by the straight-through duty ratio of adjusting Number D0To realize storage capacitor voltage UC2Stabilization；As output loading ZLWhen changing, by adjusting Sine Modulated than signal M To realize output voltage uoStabilization.Therefore, the single-stage and-phase direct-current-alternating-current converter, which uses, has magnetic integrated switch sense Output voltage (grid-connected current) instantaneous values feedback Unipolar SPWM control strategy of content network storage capacitor voltage feedforward control is It is practicable.
Technical scheme of the present invention 2 is described further with reference to the accompanying drawings and embodiments.
Single-stage and-phase voltage-type DC-DC converter with series connection magnetic integrated switch L.C. network is straight by inputting Galvanic electricity source, high frequency hybrid modulation switch, wave filter and DC load sequentially cascade composition, and in input DC power and high frequency Magnetic integrated switch L.C. network is in series between hybrid modulation switch；The magnetic integrated switch L.C. network is by energy storage inductor L0The sequentially cascade two identical SLCC types Two-port netwerk switch unit cascaded compositions of L.C. network；Each SLCC type Two-port netwerks It is by a power diode S to switch L.C. network unitj, an energy storage inductor Lj, two storage capacitor CjAnd Cj' form, work( Rate diode SjCathode and energy storage inductor LjOne end, storage capacitor CjPositive ends be connected, energy storage inductor LjIt is another End and storage capacitor Cj' positive ends be connected, power diode SjAnode and storage capacitor Cj' negative polarity end be connected It connects, storage capacitor C2Negative polarity end and the first order SLCC types Two-port netwerk switch L.C. network unit storage capacitor C1Anode Property end is connected, power diode SjWith storage capacitor Cj' connecting pin and storage capacitor CjNegative polarity end constitute j-th SLCC types Two-port netwerk switchs the input port of L.C. network unit, energy storage inductor LjWith storage capacitor Cj' connecting pin and energy storage electricity Hold CjPositive ends constitute the output port of j-th SLCC 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 storage capacitor C1' connecting pin between be connected with Energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin be connected with the positive pole line end that high frequency hybrid modulation switchs, Wherein j=1,2；Described high frequency hybrid modulation switch be by one bear the two of unidirectional voltage stress and bidirectional current stress as Power switch is limited to form；Three energy storage inductor L in the magnetic integrated switch L.C. network0、L1、L2Magnetic integrated morphology be three Inductance magnetic coupling, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement, three energy storage inductors L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Three inductance magnetic coupling arrangements use EE type magnetic cores, three Inductance coil is wound on magnetic core air-gap-free or has on the center pillar of air gap, and magnetic core has on two side columns of air gap without winding, mutual inductance M01=M12=M20；Three inductance magnetic decoupling-structures use four column type magnetic cores, and three inductance coils have rotating around in magnetic core On three columns of air gap, and air-gap-free and without winding, mutual inductance M on the 4th column of magnetic core01=M12=M20=0；One electricity Sense is respectively with other two inductance magnetic coupling arrangement using EE type magnetic cores, inductance coil N1Half and inductance coil N0It is wound on magnetic Core has on a side column of air gap, inductance coil N1The other half and inductance coil N2Being wound on magnetic core has another side column of air gap On, and magnetic core air-gap-free or have on the center pillar of air gap without winding, mutual inductance M01=M12>>M20。
Single-stage and-phase voltage-type dc-dc converter circuit structure and original with series connection magnetic integrated switch L.C. network Waveform is managed, respectively as shown in Figure 14,15.In Figure 14,15, UiFor input direct-current voltage, ZLTo export DC load, Uo、IoRespectively For output DC voltage and DC current.Magnetic integrated switch L.C. network is by energy storage inductor L0Sequentially cascade two it is identical The SLCC types Two-port netwerk switch unit cascaded composition of L.C. network, each SLCC types Two-port netwerk switch L.C. network unit is by one A power diode Sj, an energy storage inductor Lj, two storage capacitor CjAnd Cj' form；Three in magnetic integrated switch L.C. network Energy storage inductor L0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with remaining Two inductance magnetic coupling arrangements；High frequency hybrid modulation switch is to bear unidirectional voltage stress and bidirectional current stress by one Two quadrant power switch are formed；Output filter is LC wave filters；Input DC power UiWith magnetic integrated switch L.C. network it Between can set or be not provided with input filter, the pulsation of input direct-current electric current can be reduced when input filter is set.When high frequency group When closing modulation switch conducting, input DC power UiWith all storage capacitors to energy storage inductor L0、L1、L2It magnetizes, exports direct current Load maintains power supply by output filter；When high frequency hybrid modulation, which switchs, to be ended, energy storage inductor L0、L1、L2Dispel magnetic and with it is defeated Enter DC power supply UiCooperatively to all storage capacitors, output DC load power supply.Magnetic integrated switch L.C. network and height Frequency hybrid modulation is switched input direct-current voltage UiIt is modulated into high frequency pulse dc voltage u1And u2, direct current is being exported after filtered Smooth DC voltage U is obtained in loado。
It is of the present invention have series connection magnetic integrated switch L.C. network single-stage DC-DC converter, be utilize according to The identical SLCC types Two-port netwerk switch L.C. network unit of cascade two of sequence and first order Two-port netwerk switch L.C. network list Member output for second level Two-port netwerk switch L.C. network unit input come improve converter boost than single stage circuit structure, There is differences substantially with traditional single-stage PWM dc-dc converter circuits structure.Therefore, list of the present invention Grade DC-DC converter has novelty and creativeness, and with conversion efficiency high (meaning that energy loss is small), power Density height (meaning that volume, weight are small), step-up ratio are big (to mean that the wider or lower input direct-current voltage of variation range is variable Change required output DC voltage into), three energy storage inductor magnetic integrate, output voltage ripple is small, reliability is high, it is at low cost, The advantages that application prospect is extensive is a kind of ideal energy-saving type DC-DC converter, and vigorously advocating, construction is energy saving Type, conservation-minded society today have more important value.
Single-stage and-phase voltage-type dc-dc converter circuit topology with series connection magnetic integrated switch L.C. network is implemented Example, as shown in figure 16.In Figure 16, what output filter was selected is LC filter circuits；High frequency hybrid modulation switchs S1' select The devices such as IGBT, GTR also can be selected in MOSFET element.The single-stage DC-DC converter can will be a kind of unstable low Straightening galvanic electricity (such as accumulator, photovoltaic cell, fuel cell, wind energy conversion system) is transformed into required stabilization, good high voltage direct current Electricity is widely used in Small And Medium Capacity, the civilian industry DC power supply for occasion of boosting (becomes as communicated DC converter and photovoltaic DC Parallel operation 24VDC/220VDC, 48VDC/380VDC, 96VDC/380VDC) and national defense industry DC power supply (such as aviation DC converting Device 27VDC/270VDC) etc..
Each energy storage electricity of single-stage and-phase voltage-type DC-DC converter with series connection magnetic integrated switch L.C. network Sense is in a HF switch cycle TSThe magnetic that inside magnetizes and dispel is each primary, corresponding high frequency hybrid modulation switch S during magnetizing1' conducting the phase Between D0TS, and high frequency hybrid modulation switch S is corresponded to during magnetic of dispelling1(1-D during ' cut-off0)TS(is exported to outlet side the energy phase Between).The DC-DC converter energy storage inductor switchs S in high frequency hybrid modulation1D during ' conducting0TSThe equivalent electricity that magnetizes (1-D during road and cut-off0)TSMagnetic equivalent circuit of dispelling, respectively as shown in Figure 17,18.
If storage capacitor terminal voltage is in a HF switch cycle TSIt is inside invariable, uses UC1、UC2、U′c1、U′c2Table Show.Energy storage inductor switchs S in high frequency hybrid modulation as shown in Figure 171D during ' conducting0TSThe equivalent circuit that magnetizes can obtain formula (1.0)-(1.2)；Energy storage inductor switchs S in high frequency hybrid modulation as shown in Figure 181(1-D during ' cut-off0)TSMagnetic of dispelling it is equivalent Circuit can obtain formula (2.0)-(2.2)；If high frequency hybrid modulation switchs S1(1-D during ' cut-off0)TSVoltage magnitude be U1(U2), Supplementary equation (3.1)-(3.2) can be obtained；According to State-space Averaging Principle, formula (1) × D0+ formula (2) × (1-D0), it enablesAssociation type (3), magnetic integrated switch L.C. network storage capacitor voltage value UC1、UC2、U′c1、U′c2 It is represented by formula (4)；High frequency hybrid modulation switchs S1(1-D during ' cut-off0)TSVoltage magnitude U1(U2) represented by formula (5).According to Voltage-second balance principle during output inductor stable state, can obtain
(U1-U0)(1-D0)TS=U0D0TS (22)
I.e.
U0=U1(1-D0)=U2(1-D0) (23)
Therefore, there is the voltage of the single-stage and-phase voltage-type DC-DC converter of series connection magnetic integrated switch L.C. network Transfer ratio is
By formula (24) it is found that the voltage transfer ratio of the single-stage DC-DC converter is in different 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).The big step-up ratio of this converter is the cell level by increasing magnetic integrated switch L.C. network It counts to realize.
Three energy storage inductor L in the L.C. network of magnetic integrated switch shown in Figure 160、L1、L2Magnetic integrated morphology be three inductance Magnetic coupling, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement, such as Fig. 9,10,11 and 1 institute of table Show.Its operation principle and equivalent inductance relational expression are identical with formula (7)-(21).
Single-stage and-phase voltage-type DC-DC converter with series connection magnetic integrated switch L.C. network only has single stage power Transform part, control system need to realize the control of output voltage, and when supplying power for photovoltaic cell also needs to realize photovoltaic cell MPPT maximum power point tracking controls MPPT.Therefore, this single-stage DC-DC converter is controlled using the PWM of output voltage feedback Strategy, as shown in Figure 19,20.Output voltage feedback signal UofWith reference voltage UrSignal U is obtained after comparison, error amplificatione, Ue With triangular carrier ucHand over output high frequency hybrid modulation switch S after cutting1' control signal.As input voltage UiOr load ZLVariation When, by adjusting conducting dutycycle D0To realize output voltage UoStabilization.Therefore, the single-stage DC-DC converter uses The PWM control strategies of output voltage feedback are practicable.
Technical scheme of the present invention 3 is described further with reference to the accompanying drawings and embodiments.
Single-stage and-phase voltage-type A.C.-D.C. converter with series connection magnetic integrated switch L.C. network is single by input Phase AC power, single-phase high frequency hybrid modulation switch, wave filter and DC load sequentially cascade composition, and are handed in input single-phase Magnetic integrated switch L.C. network is in series between galvanic electricity source and single-phase high frequency hybrid modulation switch；The magnetic integrated switch LC Network is by energy storage inductor L0The sequentially cascade two identical SLCC types Two-port netwerk switch unit cascaded compositions of L.C. network； Each SLCC types Two-port netwerk switch L.C. network unit is by a four-quadrant power switch Sj, an energy storage inductor Lj, two storages It can capacitance CjAnd Cj' form, four-quadrant power switch SjOne end and energy storage inductor LjOne end, storage capacitor CjReference anode Property end is connected, energy storage inductor LjThe other end and storage capacitor Cj' reference positive ends be connected, four-quadrant power switch SjThe other end and storage capacitor Cj' reference negative polarity end be connected, storage capacitor C2Reference negative polarity end and the first order SLCC types Two-port netwerk switchs the storage capacitor C of L.C. network unit1Reference positive ends be connected, four-quadrant power switch Sj With storage capacitor Cj' connecting pin and storage capacitor CjReference negative polarity end constitute j-th SLCC types Two-port netwerk switch LC The input port of network element, energy storage inductor LjWith storage capacitor Cj' connecting pin and storage capacitor CjReference positive ends structure Into the output port of j-th SLCC types Two-port netwerk switch L.C. network unit, input single-phase AC power with reference to positive polarity with Storage capacitor C1With reference to the connecting pin of negative polarity and four-quadrant power switch S1With storage capacitor C1' connecting pin between be connected with Energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin and single-phase high frequency hybrid modulation switch reference positive pole line end It is connected, wherein j=1,2；The single-phase high frequency hybrid modulation switch is to bear unidirectional voltage stress and two-way electricity by four The two quadrant power switch for flowing stress are formed；Three energy storage inductor L in the magnetic integrated switch L.C. network0、L1、L2Magnetic collection Into structure be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement, three A energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Three inductance magnetic coupling arrangements use EE types Magnetic core, three inductance coils are wound on magnetic core air-gap-free or have on the center pillar of air gap, and magnetic core has nothing on two side columns of air gap Winding, mutual inductance M01=M12=M20；Three inductance magnetic decoupling-structures use four column type magnetic cores, three inductance coil difference Being wound on magnetic core has on three columns of air gap, and air-gap-free and without winding, mutual inductance M on the 4th column of magnetic core01=M12=M20=0；Institute The inductance stated is respectively with other two inductance magnetic coupling arrangement using EE type magnetic cores, inductance coil N1Half and inductor wire Enclose N0Being wound on magnetic core has on a side column of air gap, inductance coil N1The other half and inductance coil N2Being wound on magnetic core has air gap On another side column, and magnetic core air-gap-free or have on the center pillar of air gap without winding, mutual inductance M01=M12>>M20。
Single-stage and-phase voltage-type A.C.-D.C. converter circuit structure and original with series connection magnetic integrated switch L.C. network Waveform is managed, respectively as shown in Figure 21,22.In Figure 21,22, uiFor input single-phase alternating voltage, ZLTo export DC load, Uo、Io Respectively export DC voltage and DC current, the symbol "+" of storage capacitor represents energy storage electricity in magnetic integrated switch L.C. network Hold the reference positive ends of voltage.Magnetic integrated switch L.C. network is by energy storage inductor L0Sequentially cascade two it is identical SLCC types Two-port netwerk switchs the unit cascaded composition of L.C. network, and each SLCC types Two-port netwerk switch L.C. network unit is by one Four-quadrant power switch Sj, an energy storage inductor Lj, two storage capacitor CjAnd Cj' form；Three in magnetic integrated switch L.C. network A energy storage inductor L0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with its Remaining two inductance magnetic coupling arrangements；Single-phase high frequency hybrid modulation switchs, i.e., single-phase rectification bridge is to bear unidirectional voltage by four Two quadrant power switch of stress and bidirectional current stress are formed；Output filter is LC wave filters；Input ac power uiWith Input filter can be set or be not provided between magnetic integrated switch L.C. network, and input AC can be reduced when input filter is set The harmonic content of electric current.When the lower bridge arm conducting of single-phase high frequency hybrid modulation switch (single-phase rectification bridge), input ac power uiWith all storage capacitors to energy storage inductor L0、L1、L2It magnetizes, output DC load maintains power supply by wave filter；When single-phase When high frequency hybrid modulation switchs (single-phase rectification bridge) bridge arm switch cross conduction, energy storage inductor L0、L1、L2Dispel magnetic and and input hand over Galvanic electricity source uiCooperatively power to all storage capacitors, DC load.Magnetic integrated switch L.C. network and single-phase high frequency group Modulation switch (single-phase rectification bridge) is closed by input ac voltage uiAmplitude is modulated by one times of input frequency sine envelope rule The tri-state SPWM waves u of sinusoidal rule variation is pressed in variation, pulsewidth1, single-phase high frequency hybrid modulation switchs (single-phase rectification bridge) by u1Rectification The high frequency pulse dc voltage wave of sinusoidal rule variation is pressed by two times of input frequency sine envelope rule variations, pulsewidth into amplitude u2, through output filter after in DC load obtain high quality DC voltage Uo。
The single-stage and-phase A.C.-D.C. converter with series connection magnetic integrated switch L.C. network of the present invention is profit With sequentially cascade two identical SLCC types Two-port netwerk switch L.C. network units and first order Two-port netwerk switch LC net The output of network unit for second level Two-port netwerk switch L.C. network unit input come improve converter boost than single-level circuit Structure, with traditional single-stage and-phase PWM A.C.-D.C. converters (regardless of whether addition single-phase input Industrial Frequency Transformer) circuit knot There is differences substantially for structure.Therefore, single-stage and-phase A.C.-D.C. converter of the present invention has novelty and creation Property, and with conversion efficiency high (meaning that energy loss is small), power density high (meaning that volume, weight are small), step-up ratio Greatly (meaning that the wider or lower single-phase input alternating voltage of variation range can be transformed into required output DC voltage), three Energy storage inductor magnetic integrates, input current waveform distortion is small, output voltage waveforms ripple is small, reliability is high, at low cost, application prospect The advantages that extensive, be a kind of ideal energy-saving type single phase ac-DC converter, and energy-saving, section is built vigorously advocating About today of type society has more important value.
Single-stage and-phase voltage-type A.C.-D.C. converter circuit topology with series connection magnetic integrated switch L.C. network is implemented Example, as shown in figure 23.In Figure 23, output filter is LC filter circuits；Single-phase high frequency hybrid modulation switchs (single-phase rectification bridge) MOSFET element is selected, the devices such as IGBT, GTR also can be selected；The symbol "+" table of storage capacitor in magnetic integrated switch L.C. network Show the reference positive ends of storage capacitor voltage.The single-stage and-phase A.C.-D.C. converter can will be a kind of unstable low Pressure alternating current (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 It is (as whole in communicated rectifier and wind-power electricity generation to be widely used in Small And Medium Capacity, the civilian industry single-phase rectifier power for occasion of boosting for electricity Flow device 220V50HzAC/380VDC, frequency-changing AC voltage/380VDC) and national defense industry rectifier power source (such as aviation rectifier 115V400HzAC/270VDC) etc..
Each energy storage electricity of single-stage and-phase voltage-type A.C.-D.C. converter with series connection magnetic integrated switch L.C. network Sense is in a HF switch cycle TSThe magnetic that inside magnetizes and dispel is each primary, D during corresponding lower bridge arm conducting during magnetizing0TS, and magnetic of dispelling Period corresponds to (1-D during bridge arm cross-conduction0)TS(during exporting energy to DC side).The single-stage and-phase AC-DC Converter in input voltage positive and negative half cycle energy storage inductor lower bridge arm conducting during D0TSThe equivalent circuit that magnetizes, bridge arm intersection lead (1-D during logical0)TSMagnetic equivalent circuit of dispelling, respectively as shown in Figure 24,25,26,27.In Figure 24,25,26,27, input voltage uiPolarity with storage capacitor voltage in magnetic integrated switch L.C. network is reference polarity, and each current polarity is reality side To.
If storage capacitor terminal voltage is in a HF switch cycle TSIt is inside invariable, uses UC1、UC2、U′c1、U′c2Table Show.Energy storage inductor switchs S in high frequency hybrid modulation as shown in Figure 24,263′、S4′、S1′(S2') conducting during D0TSMagnetize Effect circuit can obtain formula (1.0)-(1.2)；Energy storage inductor switchs S in high frequency hybrid modulation as shown in Figure 25,271′、S4′(S2′、 S3') conducting during (1-D0)TSMagnetic equivalent circuit of dispelling can obtain formula (2.0)-(2.2)；If high frequency hybrid modulation switchs S1′、S4′ (S2′、S3') conducting during (1-D0)TSVoltage magnitude be U1, supplementary equation (3.1)-(3.2) can be obtained；According to state space The method of average, formula (1) × D0+ formula (2) × (1-D0), it enablesAssociation type (3), magnetic integrated switch LC Network storage capacitor voltage value UC1、UC2、U′c1、U′c ′2It is represented by formula (4)；High frequency hybrid modulation switch (single-phase rectification bridge) is handed over Flow the voltage magnitude U of side1With the voltage magnitude U of DC side2It is represented by formula (5).According to voltage-second balance during output inductor stable state Principle can obtain
(U2-U0)(1-D0)TS=U0D0TS (25)
I.e.
U0=U2(1-D0)=U1(1-D0) (26)
Therefore, there is the voltage of the single-stage and-phase voltage-type A.C.-D.C. converter of series connection magnetic integrated switch L.C. network Transfer ratio is
By formula (27) it is found that the voltage transfer ratio of the single-stage and-phase A.C.-D.C. converter is in different 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).The big step-up ratio of this converter is realized by increasing the unit series of magnetic integrated switch L.C. network.
Three energy storage inductor L in the L.C. network of magnetic integrated switch shown in Figure 230、L1、L2Magnetic integrated morphology be three inductance Magnetic coupling, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement, such as Fig. 9,10,11 and 1 institute of table Show.Its operation principle and equivalent inductance relational expression are identical with formula (7)-(21).
Single-stage and-phase voltage-type A.C.-D.C. converter with series connection magnetic integrated switch L.C. network only has single stage power Transform part, control system need to realize the control of the storage capacitor voltage of magnetic integrated switch L.C. network and output DC voltage System, when wind-power electricity generation, also need to realize the MPPT maximum power point tracking control MPPT of wind energy conversion system.Therefore, the exchange of this single-stage and-phase- DC converter is controlled bicyclic using output DC voltage outer shroud, magnetic integrated switch L.C. network storage capacitor voltage inter-loop SPWM control strategies, as shown in Figure 28,29.Output voltage feedback signal UofWith reference voltage UrComparison, the amplified letter of error Reference signal U number as inner ringC2r, storage capacitor voltage feedback signal UC2fAfter absolute value circuit with reference signal UC2rThan Amplify to obtain signal u compared with, errore, ueWith triangular carrier ucHand over the signal intercepted with input voltage polarity selection signal through suitable When logic circuit after output single-phase high frequency hybrid modulation switch (single-phase rectification bridge) S1′、S3′、S2′、S4' and magnetic integrated switch The four-quadrant power switch S of L.C. network1、S2Control signal.As input voltage uiOr output loading ZLDuring variation, pass through tune Save duty cycle signals D0To realize output voltage UoStabilization.Therefore, the single-stage and-phase A.C.-D.C. converter is using defeated Go out DC voltage outer shroud, the bicyclic SPWM control strategies of magnetic integrated switch L.C. network storage capacitor voltage inter-loop control are practical Feasible.
Technical scheme of the present invention 4 is described further with reference to the accompanying drawings and embodiments.
Single-stage and-phase voltage-type ac-to-ac converter with series connection magnetic integrated switch L.C. network is single by input Sequentially cascade is formed, and defeated for phase AC power, single-phase high frequency hybrid modulation switch, single phase filter and single phase ac load Enter and be in series with magnetic integrated switch L.C. network between single phase alternating current power supply and single-phase high frequency hybrid modulation switch；The magnetic integrates It is by energy storage inductor L to switch L.C. network0Sequentially cascade two identical SLCC types Two-port netwerk switch L.C. network units Cascade is formed；Each SLCC types Two-port netwerk switch L.C. network unit is by a four-quadrant power switch Sj, an energy storage electricity Feel Lj, two storage capacitor CjAnd Cj' form, four-quadrant power switch SjOne end and energy storage inductor LjOne end, storage capacitor CjReference positive ends be connected, energy storage inductor LjThe other end and storage capacitor Cj' reference positive ends be connected, four Quadrant power switch SjThe other end and storage capacitor Cj' reference negative polarity end be connected, storage capacitor C2Reference negative polarity End and the storage capacitor C of first order SLCC types Two-port netwerk switch L.C. network unit1Reference positive ends be connected, four-quadrant Power switch SjWith storage capacitor Cj' connecting pin and storage capacitor CjReference negative polarity end constitute j-th of two end of SLCC types The input port of mouth switch L.C. network unit, energy storage inductor LjWith storage capacitor Cj' connecting pin and storage capacitor CjReference Positive ends constitute the output port of j-th of SLCC types Two-port netwerk switch L.C. network unit, input single-phase AC power ginseng Examine positive polarity and storage capacitor C1With reference to the connecting pin of negative polarity and four-quadrant power switch S1With storage capacitor C1' connecting pin Between be connected with energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin and single-phase high frequency hybrid modulation switch ginseng It examines positive pole line end to be connected, wherein j=1,2；The single-phase high frequency hybrid modulation switch is to bear bi-directional voltage by one to answer The four-quadrant power switch of power and bidirectional current stress is formed；Three energy storage inductor L in the magnetic integrated switch L.C. network0、 L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic Coupled structure, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Three inductance magnetic couplings Structure uses EE type magnetic cores, and three inductance coils are wound on magnetic core air-gap-free or have on the center pillar of air gap, and magnetic core has air gap Without winding, mutual inductance M on two side columns01=M12=M20；Three inductance magnetic decoupling-structures use four column type magnetic cores, three Inductance coil has rotating around in magnetic core on three columns of air gap, and air-gap-free and without winding, mutual inductance M on the 4th column of magnetic core01= M12=M20=0；One inductance is respectively with other two inductance magnetic coupling arrangement using EE type magnetic cores, inductance coil N1's Half and inductance coil N0Being wound on magnetic core has on a side column of air gap, inductance coil N1The other half and inductance coil N2It is wound on Magnetic core has on another side column of air gap, and magnetic core air-gap-free or has on the center pillar of air gap without winding, mutual inductance M01=M12>>M20。
Single-stage and-phase voltage-type ac-to-ac converter circuit structure and original with series connection magnetic integrated switch L.C. network Waveform is managed, respectively as shown in Figure 30,31.In Figure 30,31, uiFor input single-phase alternating voltage, ZLFor single-phase output AC load (being loaded including single phase ac passive load and single phase ac power grid), uo、ioRespectively single-phase output alternating voltage and alternating current It flows, the symbol "+" of storage capacitor represents the reference positive ends of storage capacitor voltage in magnetic integrated switch L.C. network.Magnetic integrates It is by energy storage inductor L to switch L.C. network0Sequentially cascade two identical SLCC types Two-port netwerk switch L.C. network units Cascade is formed, and each SLCC types Two-port netwerk switch L.C. network unit is by a four-quadrant power switch Sj, an energy storage electricity Feel Lj, two storage capacitor CjAnd Cj' form；Three energy storage inductor L in magnetic integrated switch L.C. network0、L1、L2Magnetic integrate knot Structure is three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement；Single-phase height Frequency hybrid modulation switchs, and is that can bear the four-quadrant power switch of bi-directional voltage stress and bidirectional current stress by one to form； Single phase filter is single-phase LC wave filters (during single phase ac passive load) or (the single phase ac power grid load of single-phase LCL filter When)；Input ac power uiInput filter, setting input filter can be set or are not provided between magnetic integrated switch L.C. network The harmonic content of input AC electric current can be reduced during wave device.When single-phase high frequency hybrid modulation switch conduction, input ac power uiWith all storage capacitors to energy storage inductor L0、L1、L2It magnetizes, output AC load maintains power supply by wave filter；When single-phase During the switch cut-off of high frequency hybrid modulation, energy storage inductor L0、L1、L2Dispel magnetic and with input ac power uiCooperatively to all Storage capacitor, AC load power supply.Magnetic integrated switch L.C. network and single-phase high frequency hybrid modulation are switched input ac voltage uiAmplitude is modulated by the essentially identical tri-state SPWM waves u of one times of variation of input frequency sine envelope rule, pulsewidth1(u2), warp The sinusoidal voltage u of high quality is obtained after output filtering in AC loado。
The single-stage and-phase ac-to-ac converter with series connection magnetic integrated switch L.C. network of the present invention is profit With sequentially cascade two identical SLCC types Two-port netwerk switch L.C. network units and first order Two-port netwerk switch LC net The output of network unit for second level Two-port netwerk switch L.C. network unit input come improve converter boost than single-level circuit Structure, with traditional single-stage and-phase PWM ac-to-ac converters (regardless of whether addition single-phase input or output Industrial Frequency Transformer) There is differences substantially for circuit structure.Therefore, single-stage and-phase ac-to-ac converter of the present invention has novelty And creativeness, and with conversion efficiency high (meaning that energy loss is small), power density high (meaning that volume, weight are small), liter Pressure ratio is big (to mean that the wider or lower single-phase input alternating voltage of variation range can be transformed into required single-phase output exchange Voltage), three energy storage inductor magnetic integrate, net side power factor is high, output voltage THD is small, reliability is high, it is at low cost, before The advantages that scape is extensive is a kind of ideal energy-saving type single phase ac-AC converter, vigorously advocate build it is energy-saving, Today of conservation-minded society has more important value.
Single-stage and-phase voltage-type ac-to-ac converter circuit topology with series connection magnetic integrated switch L.C. network is implemented Example, as shown in figure 32.What Figure 32 was provided is single-phase LC filter circuits, is not provided as space is limited suitable for output waveform quality It is required that higher single-phase LCL filter circuit；Single-phase high frequency hybrid modulation switch select MOSFET element, also can be selected IGBT, The devices such as GTR；The symbol "+" of storage capacitor represents the reference positive polarity of storage capacitor voltage in magnetic integrated switch L.C. network End.The ac-to-ac converter can be by a kind of unstable single phase low voltage alternating current (such as wind energy conversion system, land-based AC power With aviation AC power etc.) required stabilization, high-quality, high-voltage one-phase alternating current are transformed into, it is widely used in Small And Medium Capacity, boosting The civilian industry single phase ac voltage stabilizing of occasion and variable-voltage power supply (such as electronic transformer 110V50HzAC/220V50HzAC) and national defence Industrial AC voltage-stabilizing and variable-voltage power supply (such as aviation electronics transformer 36V400HzAC/115V400HzAC).
Each energy storage electricity of single-stage and-phase voltage-type ac-to-ac converter with series connection magnetic integrated switch L.C. network Sense is in a HF switch cycle TSThe magnetic that inside magnetizes and dispel is each primary, corresponding single-phase high frequency hybrid modulation switch conduction during magnetizing Period D0TS, and (1-D during the switch cut-off of single-phase high frequency hybrid modulation is corresponded to during magnetic of dispelling0)TS(is exported to load-side the energy phase Between).The ac-to-ac converter is in the input positive and negative half cycle energy storage inductor of (output) voltage in single-phase high frequency group Close D during modulation switch is connected0TSThe equivalent circuit that magnetizes, cut-off during (1-D0)TSMagnetic equivalent circuit of dispelling, respectively as scheme 33rd, shown in 34,35,36.In Figure 33,34,35,36, input voltage uiWith storage capacitor voltage in magnetic integrated switch L.C. network Polarity be reference polarity, and each current polarity be actual direction.
If storage capacitor terminal voltage is in a HF switch cycle TSIt is inside invariable, uses UC1、UC2、U′c1、U′c2Table Show.Energy storage inductor switchs S in single-phase high frequency hybrid modulation as shown in Figure 33,351D during ' conducting0TSThe equivalent circuit that magnetizes can Obtain formula (1.0)-(1.2)；Energy storage inductor switchs S in single-phase high frequency hybrid modulation as shown in Figure 34,361(1-D during ' cut-off0)TS Magnetic equivalent circuit of dispelling can obtain formula (2.0)-(2.2)；If single-phase high frequency hybrid modulation switchs S1(1-D during ' cut-off0)TSElectricity Pressure amplitude value is U1(U2), supplementary equation (3.1)-(3.2) can be obtained；According to State-space Averaging Principle, formula (1) × D0+ formula (2) × (1-D0), it enablesAssociation type (3), magnetic integrated switch L.C. network storage capacitor voltage value UC1、 UC2、U′c1、U′c ′2It is represented by formula (4)；Single-phase high frequency hybrid modulation switchs S1Voltage magnitude U during ' cut-off1(U2) by formula (5) It represents.According to voltage-second balance principle during output inductor stable state, can obtain
(U2-U0)(1-D0)TS=U0D0TS (28)
I.e.
U0=U2(1-D0)=U1(1-D0) (29)
Therefore, there is the voltage of the single-stage and-phase voltage-type ac-to-ac converter of series connection magnetic integrated switch L.C. network Transfer ratio is
By formula (30) it is found that the voltage transfer ratio of the single-stage and-phase ac-to-ac converter is in different 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).The big step-up ratio of this converter is by increasing magnetic integrated switch L.C. network Unit series is realized.
Three energy storage inductor L in the L.C. network of magnetic integrated switch shown in Figure 320、L1、L2Magnetic integrated morphology be three inductance Magnetic coupling, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement, such as Fig. 9,10,11 and 1 institute of table Show.Its operation principle and equivalent inductance relational expression are identical with formula (7)-(21).
Single-stage and-phase voltage-type ac-to-ac converter with series connection magnetic integrated switch L.C. network only has single stage power Transform part, control system need to realize the control of output AC voltage, and when wind-power electricity generation also needs to realize wind energy conversion system most High-power tracing control MPPT.Therefore, this single-stage and-phase ac-to-ac converter is anti-using output AC voltage instantaneous value PWM control strategies are presented, as shown in Figure 37,38.Output voltage feedback signal uofWith reference voltage urComparison, takes absolutely error amplification To obtaining signal u after valuee, ueWith triangular carrier ucThe signal intercepted and its inversion signal are handed over respectively as single-phase high frequency group Close modulation switch S1' four-quadrant power switch the S with magnetic integrated switch L.C. network1、S2Control signal.As input voltage ui Or output loading ZLDuring variation, by adjusting duty cycle signals D0To realize output voltage uoStabilization.Therefore, the single-stage Single phase ac-AC converter is practicable using output AC voltage instantaneous values feedback PWM control strategies.

Claims (4)

1. a kind of single-stage and-phase voltage source converter with series connection magnetic integrated switch L.C. network, it is characterised in that：This change Converter circuit structure be by input DC power, single-phase high frequency hybrid modulation switch, single phase filter and single phase ac load according to Sequence cascade is formed, and is in series with magnetic integrated switch LC net between input DC power and single-phase high frequency hybrid modulation switch Network；The magnetic integrated switch L.C. network is by energy storage inductor L0Sequentially cascade two identical SLCC type Two-port netwerks are opened Close the unit cascaded composition of L.C. network；Each SLCC types Two-port netwerk switch L.C. network unit is by a power diode Sj、 One energy storage inductor Lj, two storage capacitor CjAnd Cj' form, power diode SjCathode and energy storage inductor LjOne end, storage It can capacitance CjPositive ends be connected, energy storage inductor LjThe other end and storage capacitor Cj' positive ends be connected, power Diode SjAnode and storage capacitor Cj' negative polarity end be connected, storage capacitor C2Negative polarity end and first order SLCC types Two-port netwerk switchs the storage capacitor C of L.C. network unit1Positive ends be connected, power diode SjWith storage capacitor Cj' Connecting pin and storage capacitor CjNegative polarity end constitute the input terminal of j-th SLCC types Two-port netwerk switch L.C. network unit Mouthful, energy storage inductor LjWith storage capacitor Cj' connecting pin and storage capacitor CjPositive ends constitute j-th of two end of SLCC types The output port of mouth switch L.C. network unit, input DC power positive polarity and storage capacitor C1The connecting pin of negative polarity and work( Rate diode S1With storage capacitor C1' connecting pin between be connected with energy storage inductor L0, energy storage inductor L2With storage capacitor C2' company It connects end and is connected with the positive pole line end that single-phase high frequency hybrid modulation switchs, wherein j=1,2；The single-phase high frequency hybrid modulation Switch is to bear two quadrant power switch of unidirectional voltage stress and bidirectional current stress by four to form；The magnetic integrated switch Three energy storage inductor L in L.C. network0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, one Inductance respectively with other two inductance magnetic coupling arrangement, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20Table Show；Three inductance magnetic coupling arrangements use EE type magnetic cores, and three inductance coils are wound on magnetic core air-gap-free or have air gap Center pillar on, and magnetic core has on two side columns of air gap without winding, mutual inductance M01=M12=M20；Three inductance magnetic decoupling Structure uses four column type magnetic cores, and three inductance coils have rotating around in magnetic core on three columns of air gap, and on the 4th column of magnetic core Air-gap-free and without winding, mutual inductance M01=M12=M20=0；One inductance respectively with other two inductance magnetic coupling arrangement Using EE type magnetic cores, inductance coil N1Half and inductance coil N0Being wound on magnetic core has on a side column of air gap, inductance coil N1 The other half and inductance coil N2Being wound on magnetic core has on another side column of air gap, and magnetic core air-gap-free or has on the center pillar of air gap Without winding, mutual inductance M01=M12>>M20。
2. a kind of single-stage and-phase voltage source converter with series connection magnetic integrated switch L.C. network, it is characterised in that：This change Converter circuit structure is sequentially cascaded and is formed by input DC power, high frequency hybrid modulation switch, wave filter and DC load, and And it is in series with magnetic integrated switch L.C. network between input DC power and high frequency hybrid modulation switch；The magnetic integrates out It is by energy storage inductor L to close L.C. network0Sequentially cascade two identical SLCC types Two-port netwerk switch L.C. network cell levels Connection is formed；Each SLCC types Two-port netwerk switch L.C. network unit is by a power diode Sj, an energy storage inductor Lj, two A storage capacitor CjAnd Cj' form, power diode SjCathode and energy storage inductor LjOne end, storage capacitor CjPositive ends It is connected, energy storage inductor LjThe other end and storage capacitor Cj' positive ends be connected, power diode SjAnode and storage It can capacitance Cj' negative polarity end be connected, storage capacitor C2Negative polarity end and first order SLCC types Two-port netwerk switch L.C. network The storage capacitor C of unit1Positive ends be connected, power diode SjWith storage capacitor Cj' connecting pin and storage capacitor Cj Negative polarity end constitute the input port of j-th SLCC types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith energy storage Capacitance Cj' connecting pin and storage capacitor CjPositive ends constitute j-th SLCC types Two-port netwerk switch L.C. network unit Output port, input DC power positive polarity and storage capacitor C1The connecting pin of negative polarity and power diode S1With storage capacitor C1' connecting pin between be connected with energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin and high frequency hybrid modulation The positive pole line end of switch is connected, wherein j=1,2；The high frequency hybrid modulation switch is to bear unidirectional voltage by one to answer Two quadrant power switch of power and bidirectional current stress are formed；Three energy storage inductor L in the magnetic integrated switch L.C. network0、 L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic Coupled structure, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Three inductance magnetic couplings Structure uses EE type magnetic cores, and three inductance coils are wound on magnetic core air-gap-free or have on the center pillar of air gap, and magnetic core has air gap Without winding, mutual inductance M on two side columns01=M12=M20；Three inductance magnetic decoupling-structures use four column type magnetic cores, three Inductance coil has rotating around in magnetic core on three columns of air gap, and air-gap-free and without winding, mutual inductance M on the 4th column of magnetic core01= M12=M20=0；One inductance is respectively with other two inductance magnetic coupling arrangement using EE type magnetic cores, inductance coil N1's Half and inductance coil N0Being wound on magnetic core has on a side column of air gap, inductance coil N1The other half and inductance coil N2It is wound on Magnetic core has on another side column of air gap, and magnetic core air-gap-free or has on the center pillar of air gap without winding, mutual inductance M01=M12>>M20。
3. a kind of single-stage and-phase voltage source converter with series connection magnetic integrated switch L.C. network, it is characterised in that：This change Converter circuit structure is by input single-phase AC power, single-phase high frequency hybrid modulation switch, wave filter and DC load sequentially grade Connection is formed, and is in series with magnetic integrated switch LC net between input single-phase AC power and single-phase high frequency hybrid modulation switch Network；The magnetic integrated switch L.C. network is by energy storage inductor L0Sequentially cascade two identical SLCC type Two-port netwerks are opened Close the unit cascaded composition of L.C. network；Each SLCC types Two-port netwerk switch L.C. network unit is by a four-quadrant power switch Sj, an energy storage inductor Lj, two storage capacitor CjAnd Cj' form, four-quadrant power switch SjOne end and energy storage inductor Lj's One end, storage capacitor CjReference positive ends be connected, energy storage inductor LjThe other end and storage capacitor Cj' reference anode Property end is connected, four-quadrant power switch SjThe other end and storage capacitor Cj' reference negative polarity end be connected, storage capacitor C2Reference negative polarity end and the first order SLCC types Two-port netwerk switch L.C. network unit storage capacitor C1Reference positive ends It is connected, four-quadrant power switch SjWith storage capacitor Cj' connecting pin and storage capacitor CjReference negative polarity end constitute The input port of j SLCC types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith storage capacitor Cj' connecting pin and storage It can capacitance CjReference positive ends constitute the output port of j-th SLCC types Two-port netwerk switch L.C. network unit, input Single-phase alternating current source reference positive polarity and storage capacitor C1With reference to the connecting pin of negative polarity and four-quadrant power switch S1With energy storage electricity Hold C1' connecting pin between be connected with energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin and single-phase high frequency group The reference positive pole line end for closing modulation switch is connected, wherein j=1,2；The single-phase high frequency hybrid modulation switch is by four The two quadrant power switch for bearing unidirectional voltage stress and bidirectional current stress are formed；Three in the magnetic integrated switch L.C. network A energy storage inductor L0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with its Remaining two inductance magnetic coupling arrangements, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Described three A inductance magnetic coupling arrangement uses EE type magnetic cores, and three inductance coils are wound on magnetic core air-gap-free or have on the center pillar of air gap, and Magnetic core has on two side columns of air gap without winding, mutual inductance M01=M12=M20；Three inductance magnetic decoupling-structures use four columns Type magnetic core, three inductance coils have rotating around in magnetic core on three columns of air gap, and on the 4th column of magnetic core air-gap-free and without around Group, mutual inductance M01=M12=M20=0；One inductance uses EE type magnetic cores with other two inductance magnetic coupling arrangement respectively, Inductance coil N1Half and inductance coil N0Being wound on magnetic core has on a side column of air gap, inductance coil N1The other half and electricity Feel coil N2Being wound on magnetic core has on another side column of air gap, and magnetic core air-gap-free or has on the center pillar of air gap without winding, mutual inductance M01=M12>>M20。
4. a kind of single-stage and-phase voltage source converter with series connection magnetic integrated switch L.C. network, it is characterised in that：This change Converter circuit structure is born by input single-phase AC power, single-phase high frequency hybrid modulation switch, single phase filter and single phase ac It carries sequentially cascade to form, and is in series with magnetic between input single-phase AC power and single-phase high frequency hybrid modulation switch and integrates out Close L.C. network；The magnetic integrated switch L.C. network is by energy storage inductor L0Sequentially cascade two identical SLCC types Two-port netwerk switchs the unit cascaded composition of L.C. network；Each SLCC types Two-port netwerk switch L.C. network unit is by a four-quadrant Power switch Sj, an energy storage inductor Lj, two storage capacitor CjAnd Cj' form, four-quadrant power switch SjOne end and energy storage Inductance LjOne end, storage capacitor CjReference positive ends be connected, energy storage inductor LjThe other end and storage capacitor Cj' It is connected with reference to positive ends, four-quadrant power switch SjThe other end and storage capacitor Cj' reference negative polarity end be connected, Storage capacitor C2Reference negative polarity end and the first order SLCC types Two-port netwerk switch L.C. network unit storage capacitor C1Reference Positive ends are connected, four-quadrant power switch SjWith storage capacitor Cj' connecting pin and storage capacitor CjReference negative polarity end Constitute the input port of j-th of SLCC types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith storage capacitor Cj' company Connect end and storage capacitor CjReference positive ends constitute the output terminal of j-th SLCC types Two-port netwerk switch L.C. network unit Mouthful, input single-phase AC power is with reference to positive polarity and storage capacitor C1With reference to the connecting pin of negative polarity and four-quadrant power switch S1 With storage capacitor C1' connecting pin between be connected with energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin and list The reference positive pole line end of phase high frequency hybrid modulation switch is connected, wherein j=1,2；The single-phase high frequency hybrid modulation switch It is to bear the four-quadrant power switch of bi-directional voltage stress and bidirectional current stress by one to form；The magnetic integrated switch LC Three energy storage inductor L in network0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance Respectively with other two inductance magnetic coupling arrangement, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents； Three inductance magnetic coupling arrangements use EE type magnetic cores, and three inductance coils are wound on magnetic core air-gap-free or have in air gap On column, and magnetic core has on two side columns of air gap without winding, mutual inductance M01=M12=M20；Three inductance magnetic decoupling-structures Using four column type magnetic cores, three inductance coils have rotating around in magnetic core on three columns of air gap, and without gas on the 4th column of magnetic core Gap and without winding, mutual inductance M01=M12=M20=0；One inductance uses respectively with other two inductance magnetic coupling arrangement EE type magnetic cores, inductance coil N1Half and inductance coil N0Being wound on magnetic core has on a side column of air gap, inductance coil N1It is another Half and inductance coil N2Being wound on magnetic core has on another side column of air gap, and magnetic core air-gap-free or have on the center pillar of air gap without around Group, mutual inductance M01=M12>>M20。
CN201810019192.9A 2018-01-09 2018-01-09 Single-stage and-phase voltage source converter with series connection magnetic integrated switch L.C. network Withdrawn CN108134521A (en)

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Application publication date: 20180608