CN208128126U - High voltagehigh frequency DBD electric drive based on the more level of dual transformer - Google Patents
High voltagehigh frequency DBD electric drive based on the more level of dual transformer Download PDFInfo
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- CN208128126U CN208128126U CN201820624541.5U CN201820624541U CN208128126U CN 208128126 U CN208128126 U CN 208128126U CN 201820624541 U CN201820624541 U CN 201820624541U CN 208128126 U CN208128126 U CN 208128126U
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- switching tube
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- power supply
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Abstract
The utility model discloses a kind of high voltagehigh frequency DBD electric drives based on the more level of dual transformer comprising power supply Vin, switching tube S1, S2, S3, S4, S5, S6, transformer T1With transformer T2, the switching tube S1And S2, switching tube S3And S4, switching tube S5And S6It is serially connected two-by-two respectively, and the switching tube S after series connection1And S2, switching tube S after series connection3And S4, switching tube switching tube S after series connection5And S6It is connected in parallel on the power supply V respectivelyinBoth ends, the transformer T1With transformer T2Two full-bridge circuit structures, and transformer T are connected and composed with each switching tube1And T2Primary side winding is parallel with one another, vice-side winding is serially connected, and the concatenated connection load resistance R of vice-side winding.While the utility model simplifies circuit, and guarantee the electrical isolation of High voltage output and low pressure input, dual transformer use can reduce single transformer size, share operation power, and output voltage peak value reaches as high as 25kv.
Description
Technical field
The utility model belongs to electrical engineering field, and in particular to a kind of high voltagehigh frequency based on the more level of dual transformer
DBD power supply.
Background technique
Along with the fast development of China's economy, problem of environmental pollution more attracts attention.Environmental problem is for people's
Daily life has produced serious influence.Dielectric barrier discharge (DBD) is wide as a kind of novel environmental improvement technology
It is general to be applied to exhaust gas, wastewater treatment.
Traditional DBD power supply is by the way of power frequency boosting, but this kind of power supply be there are bulky, low efficiency and to power grid
The problems such as injecting a large amount of harmonic waves, being substituted by high frequency and high voltage power supply gradually.Most of high voltagehigh frequency power supplys are adopted at this stage
With full bridge structure, the form boosted through transformer.
The prior art proposes a kind of load resonant formula DBD power supply, and structure is boosted using full-bridge inverting through transformer defeated
Square wave out is positive string wave to make to load waveform, need to increase compensation inductance in load end, right since output voltage peak value is only 4kv
In the treatment effect of higher voltage demand be not very ideal.Furthermore, it is also proposed that a kind of height using cascade connection multi-level technology
Frequency high voltage power supply, compensates without inductance, but circuit is cascaded using 24 tunnel modules, and each module requires individual electricity
Source powers while transformer being needed to be isolated, various using device.It, need to due to big only with full bridge structure output harmonic wave content
Additional inductance is added to compensate.Although the circuit is using multilevel converter, it needs multiple input powers, Mei Yimo
Block requires isolating transformer, causes device various.
Summary of the invention
The purpose of this utility model is to provide a kind of high voltagehigh frequency DBD electric drive based on multilevel converter, will
Two full bridge structure fusions are combined in series and parallel using the secondary side of the original of transformer, not only ensure that electrical isolation but also realized that more level are defeated
Out, output voltage peak value is up to 25kv.
The technical scheme adopted by the utility model is that：A kind of high voltagehigh frequency DBD electric drive based on the more level of dual transformer
Device comprising power supply Vin, switching tube S1, switching tube S2, switching tube S3, switching tube S4, switching tube S5, switching tube S6, transformer T1
With transformer T2, the switching tube S1With switching tube S2, switching tube S3With switching tube S4, switching tube S5With switching tube S6Respectively two-by-two
It is serially connected, and the switching tube S after series connection1With switching tube S2, switching tube S after series connection3With switching tube S4, switch after series connection
Pipe switching tube S5With switching tube S6It is connected in parallel on the power supply V respectivelyinBoth ends, the transformer T1With transformer T2With respectively open
It closes pipe and connects and composes two full-bridge circuit structures, and transformer T1With transformer T2Primary side winding is parallel with one another, vice-side winding phase
Mutually series connection, and the concatenated route of vice-side winding is equipped with load resistance R.
Preferably, the power supply VinUsing DC power supply.
Preferably, the transformer T1Primary side winding one end be connected to switching tube S1With switching tube S2Between, the other end connects
It connects in switching tube S3With switching tube S4Between and the end on be also connected with capacitance C1。
Preferably, the transformer T2Primary side winding one end be connected to switching tube S5With switching tube S6Between, the other end connects
It connects in switching tube S3With switching tube S4Between and the end on be also connected with capacitance C2。
Preferably, the transformer T1With transformer T2The turn ratio it is identical, be n=N2/N1。
The utility model has the beneficial effects that：In order to meet plasma exhaust gas, wastewater treatment is to high voltagehigh frequency alternating current
The demand in source, this electric drive use multilevel converter, reduce harmonic content, reduce the demand to filter inductance, rely solely on
Dual transformer leakage inductance is filtered with load capacitive.Circuit is using two full bridge structure fusions, two transformer primary sides secondary side in parallel
Series connection, single power supply power supply.The use for reducing by 2 switching tubes in structure, simplifies circuit, while guaranteeing that High voltage output is defeated with low pressure
The electrical isolation entered, dual transformer use can reduce single transformer size, share operation power.Output voltage peak value highest can
Up to 25kv.
The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
Fig. 1 is the circuit connection diagram of the utility model.
Fig. 2 is working waveform figure.
Fig. 3 is operation mode figure；Wherein Fig. 3 (1) to (10) is respectively the modal graph for switching mode 1-10.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, a kind of high voltagehigh frequency DBD electric drive based on the more level of dual transformer comprising DC power supply
Vin, switching tube S1, switching tube S2, switching tube S3, switching tube S4, switching tube S5, switching tube S6, transformer T1With transformer T2, institute
State switching tube S1With switching tube S2, switching tube S3With switching tube S4, switching tube S5With switching tube S6It is serially connected, and goes here and there two-by-two respectively
Switching tube S after connection1With switching tube S2, switching tube S after series connection3With switching tube S4, switching tube switching tube S after series connection5With open
Close pipe S6It is connected in parallel on the power supply V respectivelyinBoth ends, the transformer T1With transformer T2Two are connected and composed with each switching tube
A full-bridge circuit structure, and transformer T1With transformer T2Primary side winding is parallel with one another, vice-side winding is serially connected, and secondary side
(load resistance R is extraneous component to the connection load resistance R of windings in series, itself composition portion not as electric drive
Point).
The transformer T1Primary side winding one end be connected to switching tube S1With switching tube S2Between, the other end is connected to out
Close pipe S3With switching tube S4Between and the end on be also connected with capacitance C1.The transformer T2Primary side winding one end connection
In switching tube S5With switching tube S6Between, the other end is connected to switching tube S3With switching tube S4Between and the end on be also connected with every
Straight capacitor C2。
The working principle of the utility model is as follows：
Fig. 1 is the circuit topology of the more level high-frequency inverters of dual transformer formula, by DC power supply, switching tube S1, S2, S3,
S4, S5, S6With transformer T1, T2, capacitance C1, C2, load resistance R composition.L1mFor transformer T1Magnetizing inductance, L2mTo become
Depressor T2Magnetizing inductance.Load voltage is the sum of two transformer secondary voltages.T1And T2The turn ratio is n=N2/N1。
For simplifying the analysis, it makes the following assumptions：All switching tubes, transformer are ideal component.Fig. 2 is main work
Waveform.
Switch 1 [t of mode0-t1]：Switching tube S at this time1, S3, S5Conducting, and S2, S4, S6Shutdown.Due to transformer T1Two
Hold voltage equal, so secondary voltage is zero, transformer T2Both end voltage is equal, so secondary voltage is zero, load is electric at this time
Pressure is zero.
Switch 2 [t of mode1-t2]：Switching tube S at this time2, S3, S5Conducting, and S1, S4, S6Shutdown.Through S3, transformer T1, S2To
Transmit energy, output voltage N in secondary side1Uin, T1Exciting current is by zero linear rising, and T2Transformer is coupled to primary side by secondary side
Electric current, through S5, S3, transformer T2Circuit circulation, T2It is zero that primary voltage of transformer, which is clamped,.Load voltage is N1Uin。
It switchs mode 3 [t2, t3]：Switching tube S2 at this time, S3, S6 conducting, two S1, S4, S5 shutdown, power supply pass through respectively
Energy, load voltage N1Uin+ are transmitted to secondary side jointly in S3, the transformer circuit T1, S2 and S3, the circuit transformer T2, S6
N2Uin.The exciting current of T1 continues linear rise.The exciting current of T2 linear rise by zero.
Switch 4 [t of mode3-t4]：Switching tube S at this time2, S3, S5Conducting, S1, S4, S6Shutdown, power supply pass through S3, transformer
T1, S2Energy, output voltage N are transmitted to secondary side in circuit1Uin, exciting current continuation is linearly increasing, and transformer T2Excitation
The electric current that primary side is coupled on electric current and secondary side passes through S5, S3, transformer T2The circulation of this primary Ioops.Load voltage is N1Uin。
Switch 5 [t of mode4-t5]:Switching tube S at this time1, S3,S5Conducting, S2,S4,S6Shutdown.Transformer T1In excitation electricity
Stream passes through switching tube S3,S1, transformer T1Circuit carries out afterflow.Transformer T2In exciting current pass through switching tube S5, S3, transformation
Device T2Circuit carries out afterflow.Load voltage is zero at this time.
The state of negative half period is similar to positive half cycle, repeats no more.The equivalent circuit diagram of corresponding switch mode is as shown in Figure 3.
This electric drive by saber software carry out emulation may be implemented low harmony wave output more level waveforms, after pass through
Experiment also demonstrates the correctness of theory analysis and the feasibility of structure.It is used in dielectric barrier discharge test, output
The sinusoidal waveform of waveform high-frequency and high-voltage, meets the needs of dielectric barrier discharge.
The basic principles and main features and advantage of the utility model have been shown and described above.The ordinary skill of this field
Personnel are not it should be appreciated that above-described embodiment limits the protection scope of the utility model, all use equivalent replacements etc. in any form
Mode technical solution obtained, falls in the protection scope of the utility model.
The parts not involved in the utility model is the same as those in the prior art or can be realized by using the prior art.
Claims (5)
1. a kind of high voltagehigh frequency DBD electric drive based on the more level of dual transformer, it is characterised in that including power supply Vin, switching tube
S1, switching tube S2, switching tube S3, switching tube S4, switching tube S5, switching tube S6, transformer T1With transformer T2, the switching tube S1
With switching tube S2, switching tube S3With switching tube S4, switching tube S5With switching tube S6It is serially connected two-by-two respectively, and the switch after series connection
Pipe S1With switching tube S2, switching tube S after series connection3With switching tube S4, switching tube switching tube S after series connection5With switching tube S6Respectively
It is not connected in parallel on the power supply VinBoth ends, the transformer T1With transformer T2Two full-bridge circuits are connected and composed with each switching tube
Structure, and transformer T1With transformer T2Primary side winding is parallel with one another, vice-side winding is serially connected, and vice-side winding is concatenated
Connection load resistance R.
2. the high voltagehigh frequency DBD electric drive according to claim 1 based on the more level of dual transformer, it is characterised in that institute
State power supply VinUsing DC power supply.
3. the high voltagehigh frequency DBD electric drive according to claim 1 based on the more level of dual transformer, it is characterised in that institute
State transformer T1Primary side winding one end be connected to switching tube S1With switching tube S2Between, the other end is connected to switching tube S3With open
Close pipe S4Between and the end on be also connected with capacitance C1。
4. the high voltagehigh frequency DBD electric drive according to claim 1 based on the more level of dual transformer, it is characterised in that institute
State transformer T2Primary side winding one end be connected to switching tube S5With switching tube S6Between, the other end is connected to switching tube S3With open
Close pipe S4Between and the end on be also connected with capacitance C2。
5. special based on the high voltagehigh frequency DBD electric drive of the more level of dual transformer described according to claim 1 or 3 or 4
Sign is the transformer T1With transformer T2 The turn ratio it is identical, be n=N2/N1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820624541.5U CN208128126U (en) | 2018-04-28 | 2018-04-28 | High voltagehigh frequency DBD electric drive based on the more level of dual transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820624541.5U CN208128126U (en) | 2018-04-28 | 2018-04-28 | High voltagehigh frequency DBD electric drive based on the more level of dual transformer |
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| CN208128126U true CN208128126U (en) | 2018-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820624541.5U Active CN208128126U (en) | 2018-04-28 | 2018-04-28 | High voltagehigh frequency DBD electric drive based on the more level of dual transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113037095A (en) * | 2021-04-07 | 2021-06-25 | 湖北工业大学 | Hybrid DPS double full bridge LLC resonant converter with ultra-wide output range |
-
2018
- 2018-04-28 CN CN201820624541.5U patent/CN208128126U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113037095A (en) * | 2021-04-07 | 2021-06-25 | 湖北工业大学 | Hybrid DPS double full bridge LLC resonant converter with ultra-wide output range |
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