CN106602909A - T-shaped multi-level inversion circuit - Google Patents
T-shaped multi-level inversion circuit Download PDFInfo
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- CN106602909A CN106602909A CN201611203609.4A CN201611203609A CN106602909A CN 106602909 A CN106602909 A CN 106602909A CN 201611203609 A CN201611203609 A CN 201611203609A CN 106602909 A CN106602909 A CN 106602909A
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- Prior art keywords
- switching tube
- input power
- level
- centroid
- series
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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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a T-shaped multi-level inversion circuit, and the circuit comprises two T-shaped three-level circuits, two switching tubes, two pairs of reverse parallel switching tubes, and an LC filter circuit. The input power heteropolarity ends of the two T-shaped three-level circuits are connected through the two switching tubes, and the two pairs of reverse parallel switching tubes enables the homopolarity input power ends of the two T-shaped three-level circuits to be connected. The LC filter circuit is connected to central nodes of inversion bridge arms of the two T-shaped three-level circuits, and the ratio of the input power voltages of the two T-shaped three-level circuits is 5. The circuit generates more levels through fewer switching tubes, greatly reduces the number of power switching tubes, further reduces the cost of a multi-level inverter, improves the efficiency of the inverter, and reduces the switching frequency.
Description
Technical field
The present invention relates to a kind of T-shaped multi-level inverter circuit, belongs to electronic power inverter technical field.
Background technology
Inverter is requisite electric power conversion unit in industrialization society, and multi-electrical level inverter is even more all the time
Particularly important power electronic equipment, has obtained in-depth study and has been widely applied.Multi-electrical level inverter has output low humorous
Ripple content, height output level quantity, the low-voltage of device or current stress, high efficiency, modularization, compatibility are good etc. many excellent
Point so that it is widely applied in fields such as photovoltaic generation, wind-power electricity generation, active power filtering, electric automobiles, in mesohigh work(
Rate inversion occasion is even more has significant advantage than two-level inverter.But multi-electrical level inverter also has some inevitably to lack
Point, in order to produce more many level, needs to use more device for power switching, and this also results in multi-electrical level inverter cost
Increase, this also becomes the principal element of restriction multi-electrical level inverter development；So in the past few years every scholar proposes various electricity more
Flat inverter topology, it is desirable to less switching tube number, produce more level.
The content of the invention
The technical problem to be solved is：A kind of T-shaped multi-level inverter circuit is provided, it is T-shaped three electric using two
The optimum organization of flat circuit unit level goes out many level, realizes many level outputs of inverter.
The present invention is employed the following technical solutions to solve above-mentioned technical problem：
A kind of T-shaped multi-level inverter circuit, including many level blocks, load, wherein, many level blocks include first to the
Two T-shaped tri-level circuits, the 3rd to the 4th switching tube, the 3rd to the 4th pair of anti-series switching tube；
First T-shaped tri-level circuit includes the first input power, the first to second switch pipe, first pair of anti-series switch
Pipe, the first input power is formed by two equivalent voltage source sequential series, and the source electrode of first switch pipe connects the leakage of second switch pipe
Pole constitutes the first inverter bridge leg, and the drain electrode of first switch pipe, the source electrode of second switch pipe connect respectively the positive and negative of the first input power
Pole, first pair of anti-series switching tube connects the first input power Centroid and the first inverter bridge leg Centroid；Second T-shaped three
Level circuit includes the second input power, the 5th to the 6th switching tube, second pair of anti-series switching tube, and the second input power is by two
Individual equivalent voltage source sequential series are formed, and the drain electrode of the 5th switching tube connects source electrode second inverter bridge leg of composition of the 6th switching tube,
The drain electrode of the 6th switching tube, the source electrode of the 5th switching tube connect respectively the positive and negative electrode of the second input power, second pair of anti-series switch
Pipe connects the second input power Centroid and the second inverter bridge leg Centroid；Single voltage source voltage in second input power
It is worth for 5 times of single voltage source magnitude of voltage in the first input power；
The drain electrode of the 3rd switching tube connects the positive pole of the first input power, and the source electrode of the 3rd switching tube connects the second input power
Negative pole；The source electrode of the 4th switching tube connects the negative pole of the first input power, and the drain electrode of the 4th switching tube is connecing the second input power just
Pole；The two ends of the 3rd pair of anti-series switching tube connect respectively the positive pole of the first input power, the positive pole of the second input power, the 4th pair
The two ends of anti-series switching tube connect respectively the negative pole of the first input power, the negative pole of the second input power；In first inverter bridge leg
Connection load between heart node and the second inverter bridge leg Centroid.
Used as a preferred embodiment of the present invention, the inverter circuit also includes LC filter circuits, and LC filter circuits are connected to
Between first inverter bridge leg Centroid and the second inverter bridge leg Centroid.
Used as a preferred embodiment of the present invention, the described first to the 6th switching tube is managed using metal-oxide-semiconductor or IGBT, and often
It is parasitic two between the drain electrode of anti-paralleled diode or each switching tube and source electrode between the drain electrode of individual switching tube and source electrode
Pole pipe.
As a preferred embodiment of the present invention, first to fourth pair of anti-series switching tube be common drain series connection or
Common source is connected.
A kind of T-shaped multi-level inverter circuit, including at least two many level blocks as described above, LC filter circuits, load,
Load is in parallel with the electric capacity of LC filter circuits, by the inversion of previous many level blocks second between two neighboring many level blocks
Bridge arm Centroid is attached with latter many level blocks the first bridge arm Centroid, and level block first is inverse more than first
Become and connect between bridge arm Centroid and last many level blocks the second inverter bridge leg Centroid LC filter circuits.
The present invention adopts above technical scheme compared with prior art, with following technique effect：
1st, it is of the invention compared with traditional cascade bridge-type multi-level inverter circuit (CHB), the N number of level of identical is produced,
Switching tube number needed for CHB is 2 (N-1), and the switching tube number needed for Novel T-shaped multi-level inverter circuit of the invention is 7
(N-1)/12, the only about a quarter of the former switching tube sum, saves power switch pipe quantity；And the input that CHB needs
Dc bus level is (N-1)/2, and the present invention only needs to (N-1)/4, for the former half, so greatly save input
The cost of manufacture of power supply.
2nd, the present invention produces more level, i.e., with more compared with traditional multi-level inverter circuit under unit switching tube number
Few switching tube generates more level, and convenient using the composition staircase waveform analog AC output of many level, output harmonic wave contains
Amount is substantially reduced, and reducing output filter volume can even save wave filter, and high degree reduces multi-electrical level inverter manufacture
Cost and waste of material, in addition with the increase of output level number, the switching frequency of switching tube is also decreased, and reduces switch
Loss, improves inverter efficiency.Present invention is particularly suitable for photovoltaic power generation grid-connecting be so easily obtained several power levels into
The occasion of multiple proportion.
Description of the drawings
Fig. 1 is the schematic diagram of T-shaped multi-level inverter circuit of the invention.
Fig. 2 is the modular multilevel circuit diagram of T-shaped multi-level inverter circuit cascade composition of the invention.
Fig. 3 is tradition cascade full-bridge multi-level inverter circuit (CHB) topological diagram.
Fig. 4 is the circuit modal graph of T-shaped multi-level inverter circuit some of which switching tube conducting of the invention, wherein, (a) table
Show that node AB output levels are 1Vdc, (b) represent that node AB output levels are 2Vdc.
Fig. 5 is T-shaped multi-level inverter circuit control method schematic diagram of the invention.
Fig. 6 is T-shaped multi-level inverter circuit inverter bridge leg midpoint AB output waveform figures of the invention.
Fig. 7 is the filter circuit output waveform figure of T-shaped multi-level inverter circuit of the invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio
Same or similar element is represented to same or similar label eventually or the element with same or like function.Below by ginseng
The embodiment for examining Description of Drawings is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
The present invention a kind of T-shaped multi-level inverter circuit as shown in figure 1, including：T-shaped tri-level circuit 1, switching tube 2, T
Type tri-level circuit 3, paired anti-series switching tube 4, filter circuit 5.Input power is suitable by two equivalences in T-shaped tri-level circuit
Sequence series electrical potential source is constituted, i.e. the negative pole of a voltage source connects the positive pole of another voltage source；With two switching tubes composition
Inverter bridge leg is connected to input power electrode two ends, paired anti-series switching tube connection input power Centroid and inverter bridge leg
Central node, constitutes two substantially T-shaped tri-level circuits 1 and 3, and 3 each input supply voltage value must be 5 times of 1.
The homopolar end of two input power electrodes is connected by paired anti-series switching tube 4, and its heteropolarity end is connected by switching tube 2
Connect, 2 breaker in middle Guan Jun are that drain electrode connects input power positive pole, and source electrode connects input power negative pole, the switch of T-shaped tri-level circuit 1 and 3
Pipe inverter bridge leg Centroid A and B connect output filter circuit 5, by the switching tube turn-on and turn-off for controlling particular combination, knot
Point A, B combination output up to 25 level, export after many level staircase waveforms filtering that filter circuit 5 is exported to AB nodes.
The input power of T-shaped tri-level circuit 1 and 3 is constituted by two equivalent voltage source sequential series, i.e., one voltage
The positive pole in source connects the negative pole of another voltage source, and the inverter bridge leg being composed in series with two switching tubes is connected to input power
The drain electrode of the switching tube of two ends, i.e., connects the source electrode of another switching tube, constitutes inverter bridge leg, the drain electrode one of this inverter bridge leg
Termination input power positive pole, the termination input power negative pole of source electrode one；In pairs anti-series switching tube connects input power Centroid
With inverter bridge leg midpoint node, substantially T-shaped tri-level circuit is constituted, in addition 1 and 3 input power can also use two equivalent capacitances
Series connection accesses voltage source two ends and constitutes tri-level circuit realization, originally connects input power Centroid and inverter bridge leg midpoint section
The paired anti-series switching tube of point now connects electric capacity Centroid and inverter bridge leg midpoint node, and other parts keep constant.
The inverter bridge leg center A and B connection output LC filter circuits 5 of T-shaped tri-level circuit 1 and 3, or directly with A and B
Two nodes connection load is used as inversion output.
Switching tube adopts metal-oxide-semiconductor, IGBT or other device for power switching, inverse parallel between the drain electrode of switching tube and source electrode
Diode or the diode for parasitism.
It can also be common source series connection that all paired anti-series switching tubes can be common drain series connection, i.e., two switching tubes
Drain electrode links together or source electrode links together.In pairs two switching tube break-make control ends are gate pole in anti-series switching tube
Link together, with control signal all the way its turn-on and turn-off is controlled；Can also be replaced with the paired inverse parallel of reverse blocking IGBT
The switching tube of paired anti-series.
It is as follows that many level produce example：Paired each group of anti-series switching tube can be controlled with same switching signal in Fig. 1,
Such as tetra- groups of Q7, Q8, Q9 and Q10.When controlling switch pipe Q4, Q6, Q8 conducting, when rest switch pipe is turned off, now voltage source
1Vdc is 1Vdc in node AB output levels by Q4, Q6, Q8, and shown in (a) of circuit modal graph such as Fig. 4, black represents conducting
Switching tube in this circuit branch, grey represents the switching tube turned off on this branch road, and (b) of Fig. 4 is also so represented.Controlling switch
Pipe Q1, Q4, Q6 are turned on, the shut-off of rest switch pipe, and two voltage source 1Vdc are in node AB output levels by Q1, Q4, Q6
Shown in (b) of 2Vdc, circuit modal graph such as Fig. 4.Can obtain from -12Vdc to+12Vdc in the same manner amounting to 25 kinds of level, realization
Method is as shown in the switching tube turn-on logic of table 1：Its column is opened in " 1 " expression in the corresponding row of each output level in table 1
Corresponding switching tube, " 0 " represents and closes the corresponding switching tube of its column.As can be seen from the table, in each cycle, switch
The switching frequency of pipe Q3, Q4, Q5, Q6, Q7, Q9, Q10 is low, greatly reduces the switching loss of switching tube, the switch of Q1, Q2, Q8
Frequency is also in relatively low scope.
The switching tube turn-on logic chart of table 1
In addition with Novel T-shaped multi-level inverter circuit of the invention as basic module, cascade composition modular multilevel circuit
More level can be produced, as shown in Figure 2.Fig. 3 show tradition cascade full-bridge multi-level inverter circuit (CHB) topological diagram.
Inversion produces sinusoidal waveform example：According to nearest Automatic level control strategy (NLC), the first given base to wanting to export
Waveform is sampled, and the getable 25 kinds of level values of sampled value and institute is compared, with the level value approximate representation that both differences are minimum
Given benchmark sampled value, controls the corresponding switching tube turn-on and turn-off of now level value, as shown in Figure 5 with this；When to a week
Give in phase waveform sampling number of times it is enough when, plurality of level staircase waveform also just simulates the output of inversion waveform, for obtaining
Novel T-shaped multi-level inverter circuit AB nodes output level waveform is as shown in Figure 6 in cycle, it can be seen that output waveform is very
Close sine wave, output harmonic wave content is very low, it might even be possible to do not need filtration module directly to connect load output, after filtering electricity
The waveform exported after road LC filtering loads waveform U on RloadRloadAs shown in fig. 7, realizing the more preferable inversion output of effect.
Simultaneously this control method is simple, calculates rapid, also not high to controller hardware requirement, advantageously reduces cost.
Above example technological thought only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is every
According to technological thought proposed by the present invention, any change done on the basis of technical scheme, the scope of the present invention is each fallen within
Within.
Claims (5)
1. a kind of T-shaped multi-level inverter circuit, it is characterised in that including many level blocks, load, wherein, many level block bags
Include the first to the second T-shaped tri-level circuit, the 3rd to the 4th switching tube, the 3rd to the 4th pair of anti-series switching tube；
First T-shaped tri-level circuit includes the first input power, the first to second switch pipe, first pair of anti-series switching tube, the
One input power is formed by two equivalent voltage source sequential series, and the source electrode of first switch pipe connects the drain electrode composition of second switch pipe
First inverter bridge leg, the drain electrode of first switch pipe, the source electrode of second switch pipe connect respectively the positive and negative electrode of the first input power, the
A pair of anti-series switching tubes connect the first input power Centroid and the first inverter bridge leg Centroid；Second T-shaped three level
Circuit includes the second input power, the 5th to the 6th switching tube, second pair of anti-series switching tube, and the second input power is by two etc.
Threshold voltage source sequence is in series, and the drain electrode of the 5th switching tube connects the source electrode of the 6th switching tube and constitutes the second inverter bridge leg, and the 6th
The drain electrode of switching tube, the source electrode of the 5th switching tube connect respectively the positive and negative electrode of the second input power, and second pair of anti-series switching tube connects
Connect the second input power Centroid and the second inverter bridge leg Centroid；Single voltage source magnitude of voltage is in second input power
5 times of single voltage source magnitude of voltage in first input power；
The drain electrode of the 3rd switching tube connects the positive pole of the first input power, and the source electrode of the 3rd switching tube connects the negative of the second input power
Pole；The source electrode of the 4th switching tube connects the negative pole of the first input power, and the drain electrode of the 4th switching tube connects the positive pole of the second input power；
The two ends of the 3rd pair of anti-series switching tube connect respectively the positive pole of the first input power, the positive pole of the second input power, and the 4th pair anti-
The two ends of tandem tap pipe connect respectively the negative pole of the first input power, the negative pole of the second input power；First inverter bridge leg center
Connection load between node and the second inverter bridge leg Centroid.
2. T-shaped multi-level inverter circuit according to claim 1, it is characterised in that the inverter circuit also includes LC filtered electricals
Road, LC filter circuits are connected between the first inverter bridge leg Centroid and the second inverter bridge leg Centroid.
3. T-shaped multi-level inverter circuit according to claim 1, it is characterised in that the described first to the 6th switching tube is adopted
Managed with metal-oxide-semiconductor or IGBT, and the drain electrode and the drain electrode of anti-paralleled diode or each switching tube between source electrode of each switching tube
It is parasitic diode and source electrode between.
4. T-shaped multi-level inverter circuit according to claim 1, it is characterised in that first to fourth pair of anti-series are opened
Close pipe and be common drain series connection or common source series connection.
5. a kind of T-shaped multi-level inverter circuit, it is characterised in that including at least two many level blocks as claimed in claim 1,
LC filter circuits, load, load is in parallel with the electric capacity of LC filter circuits, by previous many between two neighboring many level blocks
Level block the second inverter bridge leg Centroid is attached with latter many level blocks the first bridge arm Centroid, first
Connect between many level blocks the first inverter bridge leg Centroid and last many level blocks the second inverter bridge leg Centroid
Connect LC filter circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611203609.4A CN106602909B (en) | 2016-12-23 | 2016-12-23 | A kind of T-type multi-level inverter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611203609.4A CN106602909B (en) | 2016-12-23 | 2016-12-23 | A kind of T-type multi-level inverter circuit |
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| Publication Number | Publication Date |
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| CN106602909A true CN106602909A (en) | 2017-04-26 |
| CN106602909B CN106602909B (en) | 2019-03-29 |
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| CN201611203609.4A Expired - Fee Related CN106602909B (en) | 2016-12-23 | 2016-12-23 | A kind of T-type multi-level inverter circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114978137A (en) * | 2022-05-05 | 2022-08-30 | 北京市科通电子继电器总厂有限公司 | Drive control circuit, system and integrated circuit of power switch device |
| CN115313890A (en) * | 2022-07-14 | 2022-11-08 | 江苏科曜能源科技有限公司 | Single-phase active clamping T-type 17-level inverter |
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| CN102594181A (en) * | 2012-02-20 | 2012-07-18 | 阳光电源股份有限公司 | Multilevel inversion topological unit and multilevel inverter |
| CN102624266A (en) * | 2012-03-16 | 2012-08-01 | 华为技术有限公司 | Three-level inverter circuit |
| CN104038090A (en) * | 2014-06-23 | 2014-09-10 | 威凡智能电气高科技有限公司 | T-shaped multi-level inverter circuit based on reverse blocking IGBT antiparallel connection |
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2016
- 2016-12-23 CN CN201611203609.4A patent/CN106602909B/en not_active Expired - Fee Related
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| CN102594181A (en) * | 2012-02-20 | 2012-07-18 | 阳光电源股份有限公司 | Multilevel inversion topological unit and multilevel inverter |
| CN102624266A (en) * | 2012-03-16 | 2012-08-01 | 华为技术有限公司 | Three-level inverter circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114978137A (en) * | 2022-05-05 | 2022-08-30 | 北京市科通电子继电器总厂有限公司 | Drive control circuit, system and integrated circuit of power switch device |
| CN115313890A (en) * | 2022-07-14 | 2022-11-08 | 江苏科曜能源科技有限公司 | Single-phase active clamping T-type 17-level inverter |
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| CN106602909B (en) | 2019-03-29 |
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