CN206878720U - A kind of multi-level converter topology with coupling inductance - Google Patents
A kind of multi-level converter topology with coupling inductance Download PDFInfo
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- CN206878720U CN206878720U CN201720730449.2U CN201720730449U CN206878720U CN 206878720 U CN206878720 U CN 206878720U CN 201720730449 U CN201720730449 U CN 201720730449U CN 206878720 U CN206878720 U CN 206878720U
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Abstract
The utility model discloses a kind of multi-level converter topology with coupling inductance, including the bridge arm for being made itself to be in one of 7 kinds of operation modes according to the control instruction received, the bridge arm includes first, second bridge unit, first, second fly-wheel diode, first coupling inductance, bridge unit is provided with node G and node H, the node H of first bridge unit is connected by the first coupling inductance with the node G of the second bridge unit, the node G of second bridge unit is connected by the first fly-wheel diode with the node G of first bridge unit, the node H of second bridge unit is connected by the second fly-wheel diode with the node H of first bridge unit, the midpoint of first coupling inductance is provided with the output end for being used for connecing load.Relative to prior art, the utility model is created and can gone to approach sinusoidal waveform using 13 kinds of level to 13 kinds of level of multi output, can effectively reduce THD values, improves output waveform quality.
Description
Technical field
It the utility model is related to the technical field of electric energy conversion, more particularly to a kind of multi-level converter with coupling inductance
Topology.
Background technology
In recent years, the high-frequency harmonic content in output voltage or electric current can be reduced due to multi-level converter technology, is entered
And the volume and cost of output inductor device are reduced, therefore the technology that can produce more level outputs increasingly attracts attention.
With Large Copacity, new energy, particular surroundings transformation of electrical energy technology, particularly electric power electric transformer popular in recent years, sine
The development of AC voltage regulator, AC chopper and flexible AC transmitting system (FACTS), energy processing system become to power electronics
Performance, stability and the cost requirement of parallel operation are also increasingly harsh, and traditional multi-level converter requires output compared with voltage levels
Often to be controlled during number using more power device, improve while so as to add system complexity system into
This.
Therefore how the multi-level converter for obtaining exporting compared with voltage levels with less power device is always industry
The direction of interior research.
Utility model content
In order to solve the above problems, the utility model, which provides, solves multi-level converter topology use in the prior art
The problems such as device is more, and output level number is few.
The solution that the utility model solves its technical problem is：A kind of multi-level converter with coupling inductance is opened up
Flutter, including：Control instruction according to receiving makes the bridge arm for itself being in one of 7 kinds of operation modes, the bridge arm includes first,
Second bridge unit, first, second fly-wheel diode, the first coupling inductance, first, second bridge unit are equipped with node
G and node H, the node H of the first bridge unit are connected by the first coupling inductance with the node G of the second bridge unit, and described
The node G of two bridge units is connected by the first fly-wheel diode with the node G of first bridge unit, second bridge-type
The node H of unit is connected by the second fly-wheel diode with the node H of first bridge unit, first coupling inductance
Midpoint is provided with the output end for being used for connecing load.
Further, bridge unit includes first, second, third power switch pipe, the first diode, the first modular power source,
Positive pole, the colelctor electrode of the second power switch pipe of the emitter stage difference link block power supply of first power switch pipe, described first
The colelctor electrode of power switch pipe connects the colelctor electrode of the 3rd power switch pipe, the emitter stage connection of second power switch pipe the
The negative pole of one diode, the emitter stage of the 3rd power switch pipe connect the positive pole of the first diode, modular power source respectively
Negative pole, the node G are described between the colelctor electrode of first power switch pipe and the colelctor electrode of the 3rd power switch pipe
Node H is between the emitter stage of second power switch pipe and the negative pole of the first diode.
Further, in addition to filter inductance, the filter inductance are connected with the output end for being used to connect load.
The beneficial effects of the utility model are：Relative to prior art, the invention can be to 13 kinds of level of multi output, profit
Go to approach sinusoidal waveform with 13 kinds of level, can effectively reduce THD values, improve output waveform quality.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described.Obviously, described accompanying drawing is part of the embodiment of the present utility model, rather than entirely
Portion's embodiment, those skilled in the art on the premise of not paying creative work, can also obtain it according to these accompanying drawings
His design and accompanying drawing.
Fig. 1 is the multi-level converter topological structure schematic diagram with coupling inductance in embodiment 1；
Fig. 2 is the working state figure of the operation mode 1 of the first bridge arm；
Fig. 3 is the working state figure of the operation mode 2 of the first bridge arm；
Fig. 4 is the working state figure of the operation mode 3 of the first bridge arm；
Fig. 5 is the working state figure of the operation mode 4 of the first bridge arm；
Fig. 6 is the working state figure of the operation mode 5 of the first bridge arm；
Fig. 7 is the working state figure of the operation mode 6 of the first bridge arm；
Fig. 8 is the working state figure of the operation mode 7 of the first bridge arm；
Fig. 9 is the load voltage waveform figure of the multi-level converter output in embodiment 1；
Figure 10 be in embodiment 1 multi-level converter output load voltage it is filtered after oscillogram.
Embodiment
Design, concrete structure and caused technique effect of the present utility model are carried out below with reference to embodiment and accompanying drawing
Clearly and completely describe, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is part of the embodiment of the present utility model, rather than whole embodiments, based on embodiment of the present utility model, the skill of this area
The other embodiment that art personnel are obtained on the premise of not paying creative work, belong to the model of the utility model protection
Enclose.In addition, all connection/annexations being previously mentioned in text, not singly refer to component and directly connect, and refer to can be according to specific reality
Situation is applied, by adding or reducing couple auxiliary, to form more excellent draw bail.Each technology in the invention is special
Sign, can be with combination of interactions on the premise of not conflicting conflict.
Embodiment 1, with reference to figure 1, a kind of multi-level converter topology with coupling inductance, including 2 identical bridge arms, the
One bridge arm a1 mutually bridges with the second bridge arm, and the first bridge arm a1 includes first, second bridge unit a11, a12, first, the
Two sustained diodes5、D6, the first coupling inductance L2。
The first bridge unit a11 includes first, second, third power switch pipe T1、T2、T3, the first diode D1、
First modular power source C1, the first power switch pipe T1Emitter stage connect the first modular power source C respectively1Positive pole, the second power opens
Close pipe T2Colelctor electrode, the first power switch pipe T1Colelctor electrode connect the 3rd power switch pipe T3Colelctor electrode, described
Two power switch pipe T2Emitter stage connect the first diode D1Negative pole, the 3rd power switch pipe T3Emitter stage difference
Connect the first diode D1Positive pole, the first modular power source C1Negative pole, in the first power switch pipe T1Colelctor electrode and
Three power switch pipe T3Colelctor electrode between set node G, in the second power switch pipe T2Emitter stage and the first diode
D1Negative pole between node H is set；
The second bridge unit a12 includes the four, the five, the 6th power switch pipe T4、T5、T6, the second diode D2、
Second modular power source C2, the 4th power switch pipe T4Emitter stage connect the second modular power source C respectively2Positive pole, the 5th power opens
Close pipe T5Colelctor electrode, the 4th power switch pipe T4Colelctor electrode connect the 6th power switch pipe T6Colelctor electrode, described
Five power switch pipe T5Emitter stage connect the second diode D2Negative pole, the 6th power switch pipe T6Emitter stage difference
Connect the second diode D2Positive pole, the second modular power source C2Negative pole, in the 4th power switch pipe T4Colelctor electrode and
Six power switch pipe T6Colelctor electrode between set node G, in the 5th power switch pipe T5Emitter stage and the second diode
D2Negative pole between node H is set；
First bridge unit a11 node H passes through the first coupling inductance L2It is connected with the second bridge unit a12 node G,
Second bridge unit a12 node G passes through the first sustained diode5It is connected with the first bridge unit a11 node G, the second bridge
Formula unit a12 node H passes through the second sustained diode6It is connected with the first bridge unit a11 node H.
The first bridge arm a1 can make according to control instruction and itself be in one of 7 kinds of operation modes, wherein 7 kinds of operation modes
Respectively：
With reference to figure 2, operation mode 1：The 3rd power switch pipe T3, the first modular power source C1, the second power switch pipe
T2, the first sustained diode5Conducting, the first power switch pipe T1, the first diode D1, the second sustained diode6,
4th, the five, the 6th power switch pipe T4、T5、T6, the second modular power source C2, the second diode D2Cut-off.
With reference to figure 3, operation mode 2：The 3rd power switch pipe T3, the first diode D1, the first sustained diode5Lead
It is logical, the second power switch pipe T2, the first power switch pipe T1, the first modular power source C1, the second sustained diode6, second
Modular power source C2, the second diode D2, the four, the five, the 6th power switch pipe T4、T5、T6Cut-off.
With reference to figure 4, operation mode 3：It is described second, third, the 6th power switch pipe T2、T3、T6, the first modular power source C1、
Second diode D2Conducting, described first, the four, the 5th power switch pipe T1、T4、T5, the second modular power source C2, the first diode
D1, first, second sustained diode5、D6Cut-off.
With reference to figure 5, operation mode 4：The first power switch pipe T1, the first diode D1, the first sustained diode5、
First modular power source C1Conducting, the second, third, fourth, fifth, the 6th power switch pipe T2、T3、T4、T5、T6, the two or two
Pole pipe D2, the second modular power source C2, the second sustained diode6Cut-off.
With reference to figure 6, operation mode 5：Firstth, the 6th power switch pipe T1、T6, first, second diode D1、D2, the first mould
Block power supply C1Conducting, the second, third, fourth, fifth power switch pipe T2、T3、T4、T5, the second modular power source C2, first,
Second sustained diode5、D6Cut-off.
With reference to figure 7, operation mode 6：The 6th power switch pipe T6, the second diode D2, the second sustained diode6Lead
It is logical, described first, second, third, fourth, the 5th power switch pipe T1、T2、T3、T4、T5, the first diode D1, first, second
Modular power source C1、C2, the first sustained diode5Cut-off.
With reference to figure 8, operation mode 7：Five, the 6th power switch pipe T5、T6, the second modular power source C2, the second afterflow
Diode D6Conducting, the first, second, third, fourth power switch pipe T1、T2、T3、T4, first, second diode D1、D2、
First modular power source C1, the first sustained diode5Cut-off.
Second bridge arm includes：6 power switch pipes, 2 diodes, 2 fly-wheel diodes, 2 modular power sources, the second coupling
Inductance L3, wherein the connected mode of the second bridge arm is similar with the first bridge arm a1, just it is not repeated here.
In the first coupling inductance L2Midpoint and the second coupling inductance L3Midpoint respectively draw node, load R1With the section
Point series connection, as optimization, load R1Also with filter inductance L1Series connection.
First bridge arm a1 topology is emulated, parallel connection power supply u1, wherein first, second modular power source C1、C2Voltage
It is worth for 100V, power supply u1Magnitude of voltage be 200V, the magnitude of voltage on A points is as shown in the table：
Table 1 (a)
| T1 | T2 | T3 | D1 | T4 | |
| Mode 1 | OFF | ON | ON | OFF | OFF |
| Mode 2 | OFF | OFF | ON | ON | OFF |
| Mode 3 | OFF | ON | ON | OFF | OFF |
| Mode 4 | ON | OFF | OFF | ON | OFF |
| Mode 5 | ON | OFF | OFF | ON | OFF |
| Mode 6 | OFF | OFF | OFF | OFF | OFF |
| Mode 7 | OFF | OFF | OFF | OFF | OFF |
Table 1 (b)
| T5 | T6 | D2 | D5 | D6 | Output voltage |
| OFF | OFF | OFF | ON | OFF | 300V |
| OFF | OFF | OFF | ON | OFF | 200V |
| OFF | ON | ON | OFF | OFF | 150V |
| OFF | OFF | OFF | ON | OFF | 100V |
| OFF | ON | ON | OFF | OFF | 50V |
| OFF | ON | ON | OFF | ON | 0 |
| ON | ON | OFF | OFF | ON | -100V |
ON：Power switch pipe is opened corresponding to referring to；OFF：Power switch pipe is closed corresponding to referring to；Output electricity
Pressure：Refer to the magnitude of voltage on A points.
The operation mode of second bridge arm is similar with the first bridge arm a1 operation mode, just not repeated description here.
By by the first bridge arm a1 or the second bridge arm be operated in respectively mode 1,2,3,4,5,6,7 one of them, A, B point with
Load R1Series connection, obtains 13 kinds of possible load voltages, goes to approach sinusoidal waveform using 13 kinds of voltages, obtains as shown in Figure 9
Voltage oscillogram.
As optimization, in load R1Upper series filtering inductance L1, so that load voltage is more smooth, as shown in Figure 10,
THD values are further reduced, improve the quality of output waveform.
Better embodiment of the present utility model is illustrated above, but the invention be not limited to it is described
Embodiment, those skilled in the art can also make a variety of equivalent changes on the premise of without prejudice to the utility model spirit
Type or replacement, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (3)
- A kind of 1. multi-level converter topology with coupling inductance, it is characterised in that including：Control instruction according to receiving makes The bridge arm of one of 7 kinds of operation modes itself is in, the bridge arm includes first, second bridge unit, the pole of first, second afterflow two Pipe, the first coupling inductance, first, second bridge unit are equipped with node G and node H, the section of first bridge unit Point H is connected by the first coupling inductance with the node G of the second bridge unit, and the node G of second bridge unit passes through first Fly-wheel diode is connected with the node G of first bridge unit, and the node H of second bridge unit passes through the second afterflow two Pole pipe is connected with the node H of first bridge unit, and the midpoint of first coupling inductance is provided with the output for being used for connecing load End.
- A kind of 2. multi-level converter topology with coupling inductance according to claim 1, it is characterised in that：Bridge unit Including first, second, third power switch pipe, the first diode, the first modular power source, the emitter stage point of the first power switch pipe Positive pole, the colelctor electrode of the second power switch pipe of other link block power supply, the colelctor electrode connection the of first power switch pipe The colelctor electrode of three power switch pipes, the negative pole of emitter stage the first diode of connection of second power switch pipe, the described 3rd The emitter stage of power switch pipe connects the negative pole of the positive pole of the first diode, modular power source respectively, and the node G is positioned at described the Between the colelctor electrode of the colelctor electrode of one power switch pipe and the 3rd power switch pipe, the node H is located at second power and opened Close between the emitter stage of pipe and the negative pole of the first diode.
- 3. a kind of multi-level converter topology with coupling inductance according to claim 1, it is characterised in that also include filter Ripple inductance, the filter inductance are connected with the output end for being used to connect load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720730449.2U CN206878720U (en) | 2017-06-21 | 2017-06-21 | A kind of multi-level converter topology with coupling inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720730449.2U CN206878720U (en) | 2017-06-21 | 2017-06-21 | A kind of multi-level converter topology with coupling inductance |
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| Publication Number | Publication Date |
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| CN206878720U true CN206878720U (en) | 2018-01-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040157A (en) * | 2017-06-21 | 2017-08-11 | 佛山科学技术学院 | A kind of multi-level converter topology with coupling inductance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040157A (en) * | 2017-06-21 | 2017-08-11 | 佛山科学技术学院 | A kind of multi-level converter topology with coupling inductance |
| CN107040157B (en) * | 2017-06-21 | 2023-08-08 | 佛山科学技术学院 | Multi-level converter topology with coupling inductor |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |