CN103825455B - The double Buck full-bridge inverter of single inductance - Google Patents
The double Buck full-bridge inverter of single inductance Download PDFInfo
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- CN103825455B CN103825455B CN201410047673.2A CN201410047673A CN103825455B CN 103825455 B CN103825455 B CN 103825455B CN 201410047673 A CN201410047673 A CN 201410047673A CN 103825455 B CN103825455 B CN 103825455B
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Abstract
A kind of double Buck full-bridge inverter of single inductance, including circuit for reversing, double Buck circuit, realizes inversion by circuit for reversing.The double Buck full-bridge inverter of list inductance of the present invention solves the bridge arm direct pass problem on traditional circuit, and compared with conventional half-bridge type inverter, the voltage stress of power device reduces, and is more suitable for high pressure, powerful occasion；Compared with dual buck inverter (DBI) circuit, it is only necessary to a filter inductance, reduce the volume and weight of whole circuit and be lost accordingly, there is higher conversion efficiency；Control program is simple, it is easy to accomplish, there is higher reliability.
Description
Technical field:
The present invention relates to a kind of double Buck full-bridge inverter of single inductance, belong to the inverter in electrical energy changer.
Background technology:
Along with the development of Power Electronic Technique, inverter has obtained studying widely and applying, dual buck inverter (Dual
Buck Inverter hereinafter referred to as DBI) it is to be suggested in recent years and the novel inverter topology of numerous studies.With tradition
Recommend, the inverter such as full-bridge is compared, DBI has without bridge arm direct pass with without switching tube parasitic diode reverse-recovery problems
Outstanding feature, power supply reliability is required that high occasion is especially suitable.DBI is the high efficiency simultaneously realizing inverter
Provide a kind of succinct approach with high reliability, there is the highest researching value and wide its development.DBI with
Conventional half-bridge inverter is the same, has the disadvantage in that DBI needs external positive and negative DC bus-bar voltage, and its amplitude exceedes defeated
Going out the twice of voltage max, DC voltage utilization rate is low, and device voltage stress is the twice of input voltage, is not suitable for height
Pressure input occasion；Brachium pontis can only export+1 and-1 binary states level, works in bipolar modulation mode, brachium pontis output waveform
Harmonic content is big, needs higher switching frequency and bigger wave filter.Additionally, DBI comprises two filter inductances,
And volume weight and the loss of magnetics occupies sizable ratio in Switching Power Supply, and along with its ratio of increase of power
Example also can become big.
Summary of the invention:
Single inductance that the present invention provides one can retain dual buck inverter (DBI) high reliability and high efficiency advantage is double
Buck full-bridge inverter.
The present invention adopts the following technical scheme that a kind of double Buck full-bridge inverter of single inductance, including external power supply U, instead
Shifting circuit and double Buck circuit, described circuit for reversing includes the first power triple-pole switch pipe S1, the second power triple-pole switch
Pipe S2, the 3rd power triple-pole switch pipe S3And the 4th power triple-pole switch pipe S4, described pair of Buck circuit includes the 5th merit
Rate triple-pole switch pipe S5, the 6th power triple-pole switch pipe S6, the first sustained diode1Negative electrode, the second afterflow two pole
Pipe D2, output inductor L, output filter capacitor C and load R, described first power triple-pole switch pipe S1Leakage
Pole is connected with the positive pole of external power supply U；First power triple-pole switch pipe S1Source electrode and the 3rd power triple-pole switch pipe S3
Drain electrode, be connected to the 5th power triple-pole switch pipe S5Drain electrode；3rd power triple-pole switch pipe S3Source electrode with external
The negative pole of power supply U connects；Second power triple-pole switch pipe S2Drain electrode be connected with the positive pole of external power supply U；4th merit
Rate triple-pole switch pipe S4Source electrode be connected with the negative pole of external power supply U；Second power triple-pole switch pipe S2Source electrode and
Four power triple-pole switch pipe S4Drain electrode, be connected to output filter capacitor C and one end of being connected of load R；Output filtering
Electric capacity C is also connected with the other end of load R, is connected to one end of output inductor L；First sustained diode1
Negative electrode and the second sustained diode2Anode, be connected to the other end of output inductor L；First afterflow two pole
Pipe D1Anode be connected with the negative pole of external power supply U；Second sustained diode2Negative electrode and external power supply U just
Pole connects；6th power triple-pole switch pipe S6Drain electrode be connected to the first sustained diode1Negative electrode and the second afterflow two
Pole pipe D2The junction point of anode；6th power triple-pole switch pipe S6Source electrode and the 5th power triple-pole switch pipe S5Source
Pole connects.
There is advantages that
(1) the bridge arm direct pass problem on traditional circuit is solved；
(2) compared with conventional half-bridge type inverter, the voltage stress of power device reduces, and is more suitable for high pressure, big merit
The occasion of rate；
(3) compared with DBI circuit, it is only necessary to a filter inductance, whole circuit volume and weight and phase are reduced
The loss answered, has higher conversion efficiency；
(4) control program is simple, it is easy to accomplish, there is higher reliability.
Accompanying drawing illustrates:
Fig. 1 is the double Buck full-bridge inverter circuit structural representation of single inductance of the present invention.
Fig. 2 is that the double Buck full-bridge inverter circuit of single inductance of the present invention respectively switchs mode schematic diagram.
Fig. 3 is the control block diagram of single inductance double Buck full-bridge inverter circuit employing of the present invention.
Wherein:
1 circuit for reversing；2 pairs of Buck circuit；S1～S6First～the 6th power triple-pole switch pipe；D1、D2
First, second fly-wheel diode；L output inductor；C output filter capacitor；The external electricity of U
Source；uoInverter output voltage；uofOutput voltage feeds back；urVoltage loop benchmark；ioInverter is defeated
Go out electric current；iofOutput current feedback；irVoltage loop output i.e. electric current loop benchmark；Drv1～drv6 power three
Pole switching tube S1～S6Driving.
Detailed description of the invention:
As it is shown in figure 1, the first power triple-pole switch pipe S in the double Buck full-bridge inverter of list inductance of the present invention1Drain electrode with
The positive pole of external power supply U connects；First power triple-pole switch pipe S1Source electrode and the 3rd power triple-pole switch pipe S3Leakage
Pole, is connected to the 5th power triple-pole switch pipe S5Drain electrode；3rd power triple-pole switch pipe S3Source electrode and external power supply
The negative pole of U connects；Second power triple-pole switch pipe S2Drain electrode be connected with the positive pole of external power supply U；4th power three
Pole switching tube S4Source electrode be connected with the negative pole of external power supply U；Second power triple-pole switch pipe S2Source electrode and the 4th merit
Rate triple-pole switch pipe S4Drain electrode, be connected to output filter capacitor C and one end of being connected of load R；Output filter capacitor
C is also connected with the other end of load R, is connected to one end of output inductor L；First sustained diode1The moon
Pole and the second sustained diode2Anode, be connected to the other end of output inductor L；First sustained diode1
Anode be connected with the negative pole of external power supply U；Second sustained diode2Negative electrode be connected with the positive pole of external power supply U；
6th power triple-pole switch pipe S6Drain electrode be connected to the first sustained diode1Negative electrode and the second sustained diode2
The junction point of anode；6th power triple-pole switch pipe S6Source electrode and the 5th power triple-pole switch pipe S5Source electrode connect.
The operation principle of the present invention is: be more than the positive half cycle of zero, the first power triple-pole switch pipe S at output voltage1With the 4th
Power triple-pole switch pipe S4Normally opened, the second power triple-pole switch pipe S2With the 3rd power triple-pole switch pipe S3Normally closed, defeated
Positive half cycle when going out electric current more than zero, by the 5th power triple-pole switch pipe S5, the 6th power triple-pole switch pipe S6Body two
Pole pipe, the first sustained diode1, output inductor L, output filter capacitor C composition buck circuit 1 work.
Positive half cycle when exporting electric current less than zero, by the 6th power triple-pole switch pipe S6, the 5th power triple-pole switch pipe S5's
Body diode, the second sustained diode2, output inductor L, output filter capacitor C composition buck circuit 2
Work；At the minus negative half period of output voltage, the second power triple-pole switch pipe S2With the 3rd power three pole S3It is normally opened,
First power triple-pole switch pipe S1With the 4th power triple-pole switch pipe S4Normally closed, when exporting electric current more than zero negative half period,
Buck circuit 1 works, and the negative half period when exporting electric current more than zero, buck circuit 2 works.Wherein, first,
Second, third, the 4th power triple-pole switch plumber's frequency modulation system, play circuit reversion effect, thus reach inversion purpose；Double
Five, the 6th power triple-pole switch pipe High ireguency SPWM modulation of Buck circuit part, to guarantee output voltage waveforms.
Due to only one of which filter inductance in the present invention, compared with DBI, it is not required to consider circulation problem, it is ensured that at buck electricity
It is not required to any bias current, it is ensured that inverter is at greater efficiency and operation at frequencies during the work of road.
Below with accompanying drawing 1 as main circuit structure, describe specific works principle and the operation mode of the present invention in conjunction with accompanying drawing 2.
1. output voltage is more than zero, and output electric current is more than zero, and now circuit includes two operation modes:
Operation mode I: as shown in Fig. 2 (a), the first power triple-pole switch pipe S1, the 4th power triple-pole switch pipe S4It is normally opened,
Second power triple-pole switch pipe S2, the 3rd power triple-pole switch pipe S3Normally closed, the 5th power triple-pole switch pipe S5Conducting,
6th power triple-pole switch pipe S6Turning off, buck circuit 1 works, and inductive current starts linear rise, supplies to load R
Electricity.
Operation mode II: as shown in Fig. 2 (b), the first power triple-pole switch pipe S1, the 4th power triple-pole switch pipe S4It is normally opened,
Second power triple-pole switch pipe S2, the 3rd power triple-pole switch pipe S3Normally closed, the 5th power triple-pole switch pipe S5Turn off,
6th power triple-pole switch pipe S6Turning off, inductive current is from the first sustained diode1Afterflow, linear decline.
2. output voltage is less than zero, and output electric current is less than zero, and now circuit includes two operation modes:
Operation mode III: as shown in Fig. 2 (c), the second power triple-pole switch pipe S2, the 3rd power triple-pole switch pipe S3It is normally opened,
First power triple-pole switch pipe S1, the 4th power triple-pole switch pipe S4Normally closed, the 6th power triple-pole switch pipe S6Conducting,
5th power triple-pole switch pipe S5Turning off, buck circuit 2 works, and inductive current starts linear rise, supplies to load R
Electricity.
Operation mode IV: as shown in Fig. 2 (d), the second power triple-pole switch pipe S2, the 3rd power triple-pole switch pipe S3It is normally opened,
First power triple-pole switch pipe S1, the 4th power triple-pole switch pipe S4Normally closed, the 6th power triple-pole switch pipe S6Turn off,
5th power triple-pole switch pipe S5Turning off, inductive current is from the second sustained diode2Afterflow, linear decline.
For realizing above operation principle, the control program of employing as shown in Figure 3: output voltage feedback uofWith Voltage loop
Benchmark urElectric current loop benchmark i is obtained through the regulation of Voltage loop PIr.Output current feedback iofWith electric current loop benchmark irThrough electric current loop
PI regulates, then is modulated by SPWM and drive circuit obtains the five, the 6th power triple-pole switch pipe S5、S6Drive
Dynamic signal drv5, drv6.Voltage loop benchmark urThrough zero-crossing comparator computing again through overdrive and dead-zone circuit obtains first,
Second, third, the 4th power triple-pole switch pipe S1、S2、S3、S4Driving signal drv1, drv2, drv3, drv4,
Because these four whole power frequency periods of switching tube the most only switch once, dead band impact is negligible.
The above is only the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, some improvement can also be made under the premise without departing from the principles of the invention, these improvement also should be regarded as the present invention's
Protection domain.
Claims (1)
1. the double Buck full-bridge inverter of single inductance, including external power supply (U), circuit for reversing (1) and double Buck
Circuit (2), it is characterised in that: described circuit for reversing (1) includes the first power triple-pole switch pipe (S1), the second power
Triple-pole switch pipe (S2), the 3rd power triple-pole switch pipe (S3) and the 4th power triple-pole switch pipe (S4), described couple of Buck
Circuit (2) includes the 5th power triple-pole switch pipe (S5), the 6th power triple-pole switch pipe (S6), the first fly-wheel diode
(D1), the second fly-wheel diode (D2), output inductor (L), output filter capacitor (C) and load (R),
Described first power triple-pole switch pipe (S1) drain electrode be connected with the positive pole of external power supply (U)；First power three pole is opened
Close pipe (S1) source electrode and the 3rd power triple-pole switch pipe (S3) drain electrode, be connected to the 5th power triple-pole switch pipe (S5)
Drain electrode；3rd power triple-pole switch pipe (S3) source electrode be connected with the negative pole of external power supply (U)；Second power three
Pole switching tube (S2) drain electrode be connected with the positive pole of external power supply (U)；4th power triple-pole switch pipe (S4) source
Pole is connected with the negative pole of external power supply (U)；Second power triple-pole switch pipe (S2) source electrode and the 4th power three pole open
Close pipe (S4) drain electrode, be connected to output filter capacitor (C) and load (R) one end of being connected；Output filter capacitor
(C) other end with load (R) is also connected, and is connected to one end of output inductor (L)；First afterflow two pole
Pipe (D1) negative electrode and the second fly-wheel diode (D2) anode, be connected to the other end of output inductor (L)；
First fly-wheel diode (D1) anode be connected with the negative pole of external power supply (U)；Second fly-wheel diode (D2)
Negative electrode is connected with the positive pole of external power supply (U)；6th power triple-pole switch pipe (S6) drain electrode be connected to the first afterflow
Diode (D1) negative electrode and the second fly-wheel diode (D2) the junction point of anode；6th power triple-pole switch pipe (S6)
Source electrode and the 5th power triple-pole switch pipe (S5) source electrode connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410047673.2A CN103825455B (en) | 2014-02-11 | 2014-02-11 | The double Buck full-bridge inverter of single inductance |
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| CN201410047673.2A CN103825455B (en) | 2014-02-11 | 2014-02-11 | The double Buck full-bridge inverter of single inductance |
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| CN103825455B true CN103825455B (en) | 2017-01-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159992B (en) * | 2015-04-28 | 2019-02-12 | 台达电子企业管理（上海）有限公司 | Electric power supply system and power-converting device |
| CN105071682A (en) * | 2015-08-04 | 2015-11-18 | 苏州弘鹏新能源有限公司 | High-reliability inverter |
| CN106685251A (en) * | 2017-01-23 | 2017-05-17 | 福州大学 | Single-inductor dual-Buck full-bridge inverter with diode series and parallel structure and control method of single-inductor dual-Buck full-bridge inverter |
| CN113296275B (en) * | 2021-06-01 | 2022-08-16 | 佳木斯大学 | Medical image observation lamp box for image department |
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