CN107888104A - A kind of non-isolated three-phase Cuk inverters of monopole - Google Patents
A kind of non-isolated three-phase Cuk inverters of monopole Download PDFInfo
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- CN107888104A CN107888104A CN201711165566.XA CN201711165566A CN107888104A CN 107888104 A CN107888104 A CN 107888104A CN 201711165566 A CN201711165566 A CN 201711165566A CN 107888104 A CN107888104 A CN 107888104A
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- inductance
- electric capacity
- phase
- voltage
- switching tube
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
Abstract
The invention discloses a kind of monopole non-isolation type three-phase Cuk inverters, and it is made up of six switching tubes, nine diodes, four inductance and four electric capacity.Inverter circuit of the present invention can export peak value can also export three-phase output phase voltage of the peak value less than its DC voltage higher than its DC voltage, also be extended to three-level inverter.The present invention can be applied to buck-boost type occasion in the case of without transformer, can be relatively low in input voltage, also can normally complete inversion function in the case where DC voltage change scope is larger, and have stable exchange output.The advantages such as the present invention has small volume, efficiency high, cost is low, circuit structure is simple, control is easy, output voltage range is big, harmonic content is low.
Description
Technical field
The present invention relates to the inverter of converters technical field, and in particular to can be applied to buck occasion
A kind of non-isolated three-phase Cuk inverters of monopole.
Background technology
Inverter is the electrical energy changer that direct current is changed into alternating current.Relative to being mainly used in middle low power field
The single-phase inverter of conjunction, three-phase inverter are more suitably applied to large-power occasions, including new energy hair due to its design feature
The various industrial occasions such as electricity, motor driving and airplane power source.
Correlative study on traditional three-phase voltage-type inverter is highly developed, and application is also very extensive.But pass
System three-phase voltage-type inverter inverter side output AC voltage is less than DC side input voltage, i.e., only suitable in reduced output voltage state
Conjunction is less than applied to ac output voltage amplitudeThe voltage-dropping type occasion of times DC input voitage.If it is applied to buck-boost type
Occasion such as field of new energy generation, because its input side is by external environment such as wind intensity, intensity of illumination and battery surface
The factors such as temperature influence, and input voltage changes greatly, and outlet side either it is grid-connected still connect load be required to it is more stable
Exchange output.This characteristic causes traditional three-phase voltage-type inverter to need to connect transformer or become in its prime configuring direct current
The mode of parallel operation builds two-stage type inverter to adjust output voltage amplitude so that it meets the voltage need of threephase load or power network
Ask.But there is the problem of volume increase, cost increase and efficiency reduce in this two-stage type three-phase inverter.For two-stage type
The problem of inverter is present, some new monopole three-phase inverter topologys also propose in succession, including the structure passive storage of buck
The three-phase inverter and the three-phase inversion by the way that buck-boost type DC-DC converter topology is combined of energy real-time performance inversion
Device.But these new acyclic type three-phase inverters need more passive energy-storage travelling wave tube and buck is limited in one's ability, thus limit
Application of such inverter in buck occasion is made.Therefore, it is necessary to which development of new three-phase voltage boosting/reducing inverter solves
Above mentioned problem is so as to more conforming to the needs of high-power new energy power generation technology.A kind of monopole non-isolated three proposed by the invention
Phase Cuk inverters are exactly the new inversion scheme for meeting the demand.
The content of the invention
Instant invention overcomes in the prior art the shortcomings that, it is therefore intended that propose a kind of non-isolated three-phase Cuk inverters of monopole,
The non-isolated three-phase Cuk inverter circuits of monopole are simple in construction, output voltage range is big, can be applied to buck occasion.
Foregoing invention purpose is realized to solve above-mentioned technical problem, the present invention is to be achieved through the following technical solutions
's：
A kind of non-isolated three-phase Cuk inverters of monopole, it is by dc source, six switching tubes, three diodes, four electricity
Sense and four electric capacity form；First inductance L1Lower end and dc source Uin"+" end connects；First inductance L1Upper end is respectively with first
Switching tube S1Colelctor electrode, the 3rd switching tube S3Colelctor electrode, the 5th switching tube S5Colelctor electrode and the first electric capacity C1Upper end connects；Direct current
Power supply Uin"-" end respectively with the first diode D1Negative electrode, the second diode D2Negative electrode and the 3rd diode D3Negative electrode connects；First
Diode D1Anode respectively with first switch pipe S1Emitter stage, second switch pipe S2Colelctor electrode and the second inductance left end L2Connection；The
Two diode D2Anode respectively with the 3rd switching tube S3Emitter stage, the 4th switching tube S4Colelctor electrode and the 3rd inductance L3Left end connects；
3rd diode D3Anode respectively with the 5th switching tube S5Emitter stage, the 6th switching tube S6Colelctor electrode and the 4th inductance L4Left end connects
Connect；First electric capacity C1Lower end is respectively at second switch pipe S2Emitter stage, the 4th switching tube S4Emitter stage and the 6th switching tube S6Transmitting
Pole connects；Second inductance L2Right-hand member respectively with the second electric capacity C2Upper end and the first load R1Left end connects；3rd inductance L3Right-hand member point
Not with the 3rd electric capacity C3Upper end and the second load R2Left end connects；4th inductance L4Right-hand member respectively with the 4th electric capacity C4Upper end and
Three load R3Left end connects；Second electric capacity C2Lower end, the 3rd electric capacity C3Lower end and the 4th electric capacity C4Lower end is connected to a bit；First
Load R1Right-hand member, the second load R2Right-hand member and the 3rd load R3Right-hand member is connected to a bit.
Inverter circuit of the present invention can export peak value and can also export peak value higher than its DC voltage and be less than its DC voltage
Three-phase output phase voltage.
Inverter circuit of the present invention is extended to three-level inverter.
Inverter of the present invention can only unidirectionally be carried due to the addition of three diodes, dc source and energy storage inductor to outlet side
Energy supply amount, meet the generation of electricity by new energy occasion such as photovoltaic cell and wind-power electricity generation.
Compared with prior art, the present invention has the advantages that：
1st, the present invention has the working characteristics of Cuk circuits, and buck inversion can be achieved, and circuit parameter design is simple；
2nd, inverter of the present invention is monopolar configuration, and circuit structure is simple, output voltage range is big, can be applied to buck
Occasion, inversion efficiency are high；
3rd, the inductive current in circuit of the present invention reduces switch element number by the body diode afterflow of power switch pipe
Amount, improve switch utilization rate；
4th, the circuit that the present invention exports widenable to three level, the output waveform of this inverter have more preferable harmonic wave frequency
Spectrum, the voltage stress that each switching tube is born is smaller, it is may apply to mesohigh occasion.
The present invention can be applied to buck-boost type occasion in the case of without transformer, can be relatively low in input voltage,
Also inversion function can be normally completed in the case where DC voltage change scope is larger, and has stable exchange output.The present invention
With small volume, efficiency high, that cost is low, circuit structure is simple, control is easy, output voltage range is big, harmonic content is low etc. is excellent
Point.
Brief description of the drawings
Fig. 1 is the electrical block diagram of the present invention；
Fig. 2 is a kind of on off state schematic diagram that the present invention works in energy storage inductor energy storage mode；
Fig. 3 is that the present invention works in the on off state schematic diagram that energy storage inductor releases energy mode；
Fig. 4 is the three-phase output phase voltage waveform figure of the present invention；
Fig. 5 is the energy storage inductor current waveform figure of the present invention；
Fig. 6 is the storage capacitor voltage oscillogram of the present invention；
Fig. 7 is the control circuit schematic diagram of the present invention；
Fig. 8 is the electrical block diagram that the present invention is extended to the output of three level；
Fig. 9 is the present invention three level waveforms of output and phase voltage waveform figure.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
The non-isolated three-phase Cuk inverters of a kind of monopole of the present invention, as shown in figure 1, being by dc source, six switches
Pipe, three diodes, four inductance and four electric capacity compositions；First inductance L1Lower end and dc source Uin"+" end connects；First
Inductance L1Upper end respectively with first switch pipe S1Colelctor electrode, the 3rd switching tube S3Colelctor electrode, the 5th switching tube S5Colelctor electrode and first
Electric capacity C1Upper end connects；Dc source Uin"-" end respectively with the first diode D1Negative electrode, the second diode D2Negative electrode and the three or two
Pole pipe D3Negative electrode connects；First diode D1Anode respectively with first switch pipe S1Emitter stage, second switch pipe S2Colelctor electrode and
Two inductance left end L2Connection；Second diode D2Anode respectively with the 3rd switching tube S3Emitter stage, the 4th switching tube S4Colelctor electrode and
3rd inductance L3Left end connects；3rd diode D3Anode respectively with the 5th switching tube S5Emitter stage, the 6th switching tube S6Colelctor electrode
With the 4th inductance L4Left end connects；First electric capacity C1Lower end is respectively at second switch pipe S2Emitter stage, the 4th switching tube S4Emitter stage
With the 6th switching tube S6Emitter stage connects；Second inductance L2Right-hand member respectively with the second electric capacity C2Upper end and the first load R1Left end connects
Connect；3rd inductance L3Right-hand member respectively with the 3rd electric capacity C3Upper end and the second load R2Left end connects；4th inductance L4Right-hand member respectively with
4th electric capacity C4Upper end and the 3rd load R3Left end connects；Second electric capacity C2Lower end, the 3rd electric capacity C3Lower end and the 4th electric capacity C4Under
End is connected to a bit；First load R1Right-hand member, the second load R2Right-hand member and the 3rd load R3Right-hand member is connected to a bit.
Because the present invention is the inverter based on Cuk circuits, input inductive current is synchronous with the holding of outputting inductance electric current to be become
Change.In order to release the coupled relation of input side inductance and outlet side inductance, outlet side inductive current is set to occur in input side electric current
Remain to keep continuous state when discontinuously, this topology adds three diodes in input side, reaches and reduces output voltage Zero-crossing Distortion
Purpose.
The inverter has the working characteristics of Cuk circuits, so the analysis to inverter can be reduced to Cuk circuits
Analysis.Hypothesis below is done to simplify the analysis：(1) all elements are all ideal component in circuit；(2) converter works in stabilization
State.
When three power switch tube Ss of upper bridge arm1, S3, S5In any one, two or all when opening, dc source Uin
To energy storage inductor L1Release energy, circuit operating pattern during one of which on off state is as shown in Figure 2；When three of upper bridge arm
Power switch tube S1, S3, S5When simultaneously turning off, dc source UinWith energy storage inductor L1To storage capacitor C1Release energy, the switch
Circuit operating pattern under state is as shown in Figure 3.
Take Three-phase SPWM modulation system to can obtain three-phase and export phase voltage as shown in figure 4, energy storage inductor L1Current waveform
As shown in figure 5, storage capacitor C1Voltage waveform is as shown in Figure 6.
As shown in fig. 7, the present invention uses traditional single closed loop output voltage control scheme, sampling three-phase exports phase voltage,
It is multiplied by after certain coefficient compared with three-phase given voltage, three-phase error signal is transformed to two-phase error signal by CLARK, through adjusting
Pass through CLARK after section device regulation-1Three-phase modulations signal is transformed to, opening for six power switch is then determined compared with triangular carrier
Logical and shut-off.The control structure is simple, and dynamic response is fast, and tracking performance is good, and make inverter input supply voltage fluctuation compared with
Remain to obtain the preferable output voltage of quality during big or load changing.
Circuit of the present invention is extended to the circuit of three level output as shown in figure 8, its output waveform has more as shown in Figure 9
Good harmonic spectrum, the voltage stress that each switching tube is born is smaller, may apply to mesohigh occasion.
Claims (3)
- A kind of 1. monopole non-isolation type three-phase Cuk inverters, by dc source, six switching tubes, three diodes, four inductance Formed with four electric capacity；It is characterized in that：First inductance L1Lower end and dc source Uin"+" end connects；First inductance L1Upper end respectively with first switch pipe S1Current collection Pole, the 3rd switching tube S3Colelctor electrode, the 5th switching tube S5Colelctor electrode and the first electric capacity C1Upper end connects；Dc source Uin"-" end point Not with the first diode D1Negative electrode, the second diode D2Negative electrode and the 3rd diode D3Negative electrode connects；First diode D1Anode point Not with first switch pipe S1Emitter stage, second switch pipe S2Colelctor electrode and the second inductance left end L2Connection；Second diode D2Anode Respectively with the 3rd switching tube S3Emitter stage, the 4th switching tube S4Colelctor electrode and the 3rd inductance L3Left end connects；3rd diode D3Sun Pole respectively with the 5th switching tube S5Emitter stage, the 6th switching tube S6Colelctor electrode and the 4th inductance L4Left end connects；First electric capacity C1Under End is respectively at second switch pipe S2Emitter stage, the 4th switching tube S4Emitter stage and the 6th switching tube S6Emitter stage connects；Second inductance L2Right-hand member respectively with the second electric capacity C2Upper end and the first load R1Left end connects；3rd inductance L3Right-hand member respectively with the 3rd electric capacity C3On End and the second load R2Left end connects；4th inductance L4Right-hand member respectively with the 4th electric capacity C4Upper end and the 3rd load R3Left end connects； Second electric capacity C2Lower end, the 3rd electric capacity C3Lower end and the 4th electric capacity C4Lower end is connected to a bit；First load R1It is right-hand member, second negative Carry R2Right-hand member and the 3rd load R3Right-hand member is connected to a bit.
- A kind of 2. non-isolated three-phase Cuk inverters of monopole according to claim 1, it is characterised in that：The inverter electricity Road can export peak value can also export three-phase output phase voltage of the peak value less than its DC voltage higher than its DC voltage.
- A kind of 3. non-isolated three-phase Cuk inverters of monopole according to claim 1 or 2, it is characterised in that：The inverter Circuit is extended to three-level inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711165566.XA CN107888104A (en) | 2017-11-21 | 2017-11-21 | A kind of non-isolated three-phase Cuk inverters of monopole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711165566.XA CN107888104A (en) | 2017-11-21 | 2017-11-21 | A kind of non-isolated three-phase Cuk inverters of monopole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107888104A true CN107888104A (en) | 2018-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711165566.XA Pending CN107888104A (en) | 2017-11-21 | 2017-11-21 | A kind of non-isolated three-phase Cuk inverters of monopole |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895223A (en) * | 2010-06-11 | 2010-11-24 | 燕山大学 | Double-Cuk buck-boost output parallel-type converter |
| US8472211B2 (en) * | 2009-09-28 | 2013-06-25 | International Business Machines Corporation | Single stage power conversion unit with circuit to smooth and holdup DC output voltage |
| CN103401465A (en) * | 2013-08-13 | 2013-11-20 | 青岛理工大学 | Wide range voltage adjustable buck-boost single-stage inverter circuit device |
| CN205647288U (en) * | 2016-04-29 | 2016-10-12 | 三峡大学 | Non - isolated form photovoltaic grid -connected inverter |
| CN107196548A (en) * | 2017-06-23 | 2017-09-22 | 南通大学 | Three-phase high-gain Buck Boost integrated form boosting inverters |
-
2017
- 2017-11-21 CN CN201711165566.XA patent/CN107888104A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8472211B2 (en) * | 2009-09-28 | 2013-06-25 | International Business Machines Corporation | Single stage power conversion unit with circuit to smooth and holdup DC output voltage |
| CN101895223A (en) * | 2010-06-11 | 2010-11-24 | 燕山大学 | Double-Cuk buck-boost output parallel-type converter |
| CN103401465A (en) * | 2013-08-13 | 2013-11-20 | 青岛理工大学 | Wide range voltage adjustable buck-boost single-stage inverter circuit device |
| CN205647288U (en) * | 2016-04-29 | 2016-10-12 | 三峡大学 | Non - isolated form photovoltaic grid -connected inverter |
| CN107196548A (en) * | 2017-06-23 | 2017-09-22 | 南通大学 | Three-phase high-gain Buck Boost integrated form boosting inverters |
Non-Patent Citations (1)
| Title |
|---|
| HUGO RIBEIRO ET AL.: "Single Stage Inverter for PV Applications with One Cycle Sampling Technique in the MPPT Algorithm", 《2009 35TH ANNUAL CONFERENCE OF IEEE INDUSTRIAL ELECTRONICS》 * |
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Application publication date: 20180406 |
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