CN103825455A - Single-inductor dual-buck full-bridge inverter - Google Patents
Single-inductor dual-buck full-bridge inverter Download PDFInfo
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- CN103825455A CN103825455A CN201410047673.2A CN201410047673A CN103825455A CN 103825455 A CN103825455 A CN 103825455A CN 201410047673 A CN201410047673 A CN 201410047673A CN 103825455 A CN103825455 A CN 103825455A
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- switch pipe
- pole switch
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Abstract
The invention relates to a single-inductor dual-buck full-bridge inverter comprising a reversing circuit and a dual-buck circuit, so that inversion is realized by the reversing circuit. According to the invention, with the inverter, a bridge arm straight problem at the traditional circuit can be solved. Compared with the traditional half-bridge inverter, the provided single-inductor dual-buck full-bridge inverter enables the voltage stress of the power device to be reduced and thus is suitable for occasions with high voltage and high power. Compared with the dual-buck inverter (DBI) circuit, the circuit of the single-inductor dual-buck full-bridge inverter has the advantages that only one filter inductor is needed to reduce the size and the weight of the whole circuit and the corresponding loss and the conversion efficiency is high. The control scheme is simple and is easy to realize; and high reliability is realized.
Description
Technical field:
The present invention relates to the two Buck full-bridge inverters of a kind of single inductance, belong to the inverter in electrical energy changer.
Background technology:
Along with the development of power electronic technology, inverter has obtained studying widely and applying, and dual buck inverter (Dual Buck Inverter-hereinafter to be referred as DBI) be the novel inverter topology that is suggested in recent years and studies in a large number.With traditional recommend, compared with the inverter such as full-bridge, DBI has without bridge arm direct pass with without the outstanding feature of switching tube parasitic diode reverse-recovery problems, requires high occasion especially applicable for power supply reliability.DBI, for the high efficiency and the high reliability that realize inverter provide a kind of succinct approach simultaneously, has very high researching value and wide its development.DBI is the same with traditional half-bridge inverter, exist following shortcoming: DBI to need external positive and negative DC bus-bar voltage, its amplitude exceedes the peaked twice of output voltage, and direct voltage utilance is low, device voltage stress is the twice of input voltage, is not suitable for high input voltage occasion; Brachium pontis can only export+and 1 and-1 binary states level, work in bipolarity modulation system, brachium pontis output waveform harmonic content is large, needs higher switching frequency and larger filter.In addition, in DBI, comprise two filter inductances, and the volume weight of magnetic element and loss occupy sizable ratio in Switching Power Supply, and along with its ratio of increase of power also can become large.
Summary of the invention:
The invention provides the two Buck full-bridge inverters of single inductance that one can retain dual buck inverter (DBI) high reliability and high efficiency advantage.
The present invention adopts following technical scheme: the two Buck full-bridge inverters of a kind of single inductance, comprise external power supply U, circuit for reversing and two Buck circuit, and described circuit for reversing comprises the first power triple-pole switch pipe S
1, the second power triple-pole switch pipe S
2, the 3rd power triple-pole switch pipe S
3and the 4th power triple-pole switch pipe S
4, described pair of Buck circuit comprises the 5th power triple-pole switch pipe S
5, the 6th power triple-pole switch pipe S
6, the first sustained diode
1negative electrode, the second sustained diode
2, output inductor L, output filter capacitor C and load R, described the first power triple-pole switch pipe S
1drain electrode be connected with the positive pole of external power supply U; The first power triple-pole switch pipe S
1source electrode and the 3rd power triple-pole switch pipe S
3drain electrode, be connected to the 5th power triple-pole switch pipe S
5drain electrode; The 3rd power triple-pole switch pipe S
3source electrode be connected with the negative pole of external power supply U; The second power triple-pole switch pipe S
2drain electrode be connected with the positive pole of external power supply U; The 4th power triple-pole switch pipe S
4source electrode be connected with the negative pole of external power supply U; The second power triple-pole switch pipe S
2source electrode and the 4th power triple-pole switch pipe S
4drain electrode, be connected to one end that output filter capacitor C is connected with 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; The first sustained diode
1negative electrode and the second sustained diode
2anode, be connected to the other end of output inductor L; The first sustained diode
1anode be connected with the negative pole of external power supply U; The second sustained diode
2negative electrode be connected with the positive pole of external power supply U; The 6th power triple-pole switch pipe S
6drain electrode be connected to the first sustained diode
1negative electrode and the second sustained diode
2the tie point of anode; The 6th power triple-pole switch pipe S
6source electrode and the 5th power triple-pole switch pipe S
5source electrode connect.
The present invention has following beneficial effect:
(1) solved the bridge arm direct pass problem on traditional circuit;
(2) compared with traditional inverter of semibridge type, the voltage stress of power device reduces, and is more applicable to high pressure, powerful occasion;
(3) compared with DBI circuit, only need a filter inductance, reduce whole circuit volume and weight and corresponding loss, there is higher conversion efficiency;
(4) control program is simple, is easy to realize, and has higher reliability.
Accompanying drawing explanation:
Fig. 1 is the two Buck full-bridge inverter circuit structural representations of single inductance of the present invention.
Fig. 2 is the two each switch mode of the Buck full-bridge inverter circuit schematic diagrames of single inductance of the present invention.
Fig. 3 is the control block diagram that the two Buck full-bridge inverter circuit of single inductance of the present invention adopt.
Wherein:
1---circuit for reversing; 2---two Buck circuit; S
1～S
6---the first～six power triple-pole switch pipe; D
1, D
2---first, second fly-wheel diode; L---output inductor; C---output filter capacitor; U---external power supply; u
o---inverter output voltage; u
of---output voltage feedback; u
r---Voltage loop benchmark; i
o---inverter output current; i
of---output current feedback; i
r---Voltage loop output is electric current loop benchmark; Drv1～drv6---power triple-pole switch pipe S
1～S
6driving.
Embodiment:
As shown in Figure 1, the first power triple-pole switch pipe S in the two Buck full-bridge inverters of list inductance of the present invention
1drain electrode be connected with the positive pole of external power supply U; The first power triple-pole switch pipe S
1source electrode and the 3rd power triple-pole switch pipe S
3drain electrode, be connected to the 5th power triple-pole switch pipe S
5drain electrode; The 3rd power triple-pole switch pipe S
3source electrode be connected with the negative pole of external power supply U; The second power triple-pole switch pipe S
2drain electrode be connected with the positive pole of external power supply U; The 4th power triple-pole switch pipe S
4source electrode be connected with the negative pole of external power supply U; The second power triple-pole switch pipe S
2source electrode and the 4th power triple-pole switch pipe S
4drain electrode, be connected to one end that output filter capacitor C is connected with 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; The first sustained diode
1negative electrode and the second sustained diode
2anode, be connected to the other end of output inductor L; The first sustained diode
1anode be connected with the negative pole of external power supply U; The second sustained diode
2negative electrode be connected with the positive pole of external power supply U; The 6th power triple-pole switch pipe S
6drain electrode be connected to the first sustained diode
1negative electrode and the second sustained diode
2the tie point of anode; The 6th power triple-pole switch pipe S
6source electrode and the 5th power triple-pole switch pipe S
5source electrode connect.
Operation principle of the present invention is: the positive half cycle that is greater than zero at output voltage, the first power triple-pole switch pipe S
1with the 4th power triple-pole switch pipe S
4often open the second power triple-pole switch pipe S
2with the 3rd power triple-pole switch pipe S
3normally closed, to be greater than at 1 o'clock at output current positive half cycle, by the 5th power triple-pole switch pipe S
5, the 6th power triple-pole switch pipe S
6body diode, the first sustained diode
1, output inductor L, output filter capacitor C composition buck circuit 1 work.The positive half cycle that is less than at 1 o'clock at output current, by the 6th power triple-pole switch pipe S
6, the 5th power triple-pole switch pipe S
5body diode, the second sustained diode
2, 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 S
2with the 3rd power three utmost point S
3often open the first power triple-pole switch pipe S
1with the 4th power triple-pole switch pipe S
4normally closed, to be greater than at 1 o'clock at output current negative half period, buck circuit 1 is worked, and the negative half period that is greater than at 1 o'clock at output current, buck circuit 2 is worked.Wherein, first, second, third, fourth power triple-pole switch plumber frequency modulation system, plays circuit reversion effect, thereby reaches inversion object; The the 5th, the 6th power triple-pole switch pipe High ireguency SPWM modulation of two Buck circuit parts, to guarantee output voltage waveforms.Owing to only having a filter inductance in the present invention, compared with DBI, do not need to consider circulation problem, can guarantee not need any bias current in the time of buck circuit working, assurance inverter is worked under greater efficiency and frequency.
Take accompanying drawing 1 as main circuit structure, 2 narrate specific works principle of the present invention and operation mode by reference to the accompanying drawings below.
1. output voltage is greater than zero, and output current is greater than zero, and now circuit comprises two operation modes:
Operation mode I: as shown in Fig. 2 (a), the first power triple-pole switch pipe S
1, the 4th power triple-pole switch pipe S
4often open the second power triple-pole switch pipe S
2, the 3rd power triple-pole switch pipe S
3normally closed, the 5th power triple-pole switch pipe S
5conducting, the 6th power triple-pole switch pipe S
6turn-off, buck circuit 1 is worked, and inductive current starts linear rising, gives load R power supply.
Operation mode II: as shown in Fig. 2 (b), the first power triple-pole switch pipe S
1, the 4th power triple-pole switch pipe S
4often open the second power triple-pole switch pipe S
2, the 3rd power triple-pole switch pipe S
3normally closed, the 5th power triple-pole switch pipe S
5turn-off the 6th power triple-pole switch pipe S
6turn-off, inductive current is from the first sustained diode
1afterflow, linear decline.
2. output voltage is less than zero, and output current is less than zero, and now circuit comprises two operation modes:
Operation mode III: as shown in Fig. 2 (c), the second power triple-pole switch pipe S
2, the 3rd power triple-pole switch pipe S
3often open the first power triple-pole switch pipe S
1, the 4th power triple-pole switch pipe S
4normally closed, the 6th power triple-pole switch pipe S
6conducting, the 5th power triple-pole switch pipe S
5turn-off, buck circuit 2 is worked, and inductive current starts linear rising, gives load R power supply.
Operation mode IV: as shown in Fig. 2 (d), the second power triple-pole switch pipe S
2, the 3rd power triple-pole switch pipe S
3often open the first power triple-pole switch pipe S
1, the 4th power triple-pole switch pipe S
4normally closed, the 6th power triple-pole switch pipe S
6turn-off the 5th power triple-pole switch pipe S
5turn-off, inductive current is from the second sustained diode
2afterflow, linear decline.
For realizing above operation principle, the control program of employing as shown in Figure 3: output voltage feedback u
ofwith Voltage loop benchmark u
rregulate and obtain electric current loop benchmark i through Voltage loop PI
r.Output current feedback i
ofwith electric current loop benchmark i
rregulate through electric current loop PI, then modulate and drive circuit obtains the 5th, the 6th power triple-pole switch pipe S by SPWM
5, S
6driving signal drv5, drv6.Voltage loop benchmark u
robtain first, second, third, fourth power triple-pole switch pipe S through overdriving with dead-zone circuit again through zero-crossing comparator computing
1, S
2, S
3, S
4driving signal drv1, drv2, drv3, drv4 because these four whole power frequency periods of switching tube all a switch once, dead band impact can be ignored.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, can also make under the premise without departing from the principles of the invention some improvement, and these improve and also should be considered as protection scope of the present invention.
Claims (1)
1. the two Buck full-bridge inverters of single inductance, comprise external power supply U, circuit for reversing (1) and two Buck circuit (2), it is characterized in that: described circuit for reversing (1) comprises the first power triple-pole switch pipe S
1, the second power triple-pole switch pipe S
2, the 3rd power triple-pole switch pipe S
3and the 4th power triple-pole switch pipe S
4, described pair of Buck circuit (2) comprises the 5th power triple-pole switch pipe S
5, the 6th power triple-pole switch pipe S
6, the first sustained diode
1negative electrode, the second sustained diode
2, output inductor L, output filter capacitor C and load R, described the first power triple-pole switch pipe S
1drain electrode be connected with the positive pole of external power supply U; The first power triple-pole switch pipe S
1source electrode and the 3rd power triple-pole switch pipe S
3drain electrode, be connected to the 5th power triple-pole switch pipe S
5drain electrode; The 3rd power triple-pole switch pipe S
3source electrode be connected with the negative pole of external power supply U; The second power triple-pole switch pipe S
2drain electrode be connected with the positive pole of external power supply U; The 4th power triple-pole switch pipe S
4source electrode be connected with the negative pole of external power supply U; The second power triple-pole switch pipe S
2source electrode and the 4th power triple-pole switch pipe S
4drain electrode, be connected to one end that output filter capacitor C is connected with 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; The first sustained diode
1negative electrode and the second sustained diode
2anode, be connected to the other end of output inductor L; The first sustained diode
1anode be connected with the negative pole of external power supply U; The second sustained diode
2negative electrode be connected with the positive pole of external power supply U; The 6th power triple-pole switch pipe S
6drain electrode be connected to the first sustained diode
1negative electrode and the second sustained diode
2the tie point of anode; The 6th power triple-pole switch pipe S
6source electrode and the 5th power triple-pole switch pipe S
5source electrode connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410047673.2A CN103825455B (en) | 2014-02-11 | 2014-02-11 | The double Buck full-bridge inverter of single inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410047673.2A CN103825455B (en) | 2014-02-11 | 2014-02-11 | The double Buck full-bridge inverter of single inductance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103825455A true CN103825455A (en) | 2014-05-28 |
| CN103825455B CN103825455B (en) | 2017-01-04 |
Family
ID=50760353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410047673.2A Expired - Fee Related CN103825455B (en) | 2014-02-11 | 2014-02-11 | The double Buck full-bridge inverter of single inductance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103825455B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071682A (en) * | 2015-08-04 | 2015-11-18 | 苏州弘鹏新能源有限公司 | High-reliability inverter |
| CN106159992A (en) * | 2015-04-28 | 2016-11-23 | 台达电子企业管理（上海）有限公司 | Electric power supply system and power-converting device |
| 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 |
| CN113296275A (en) * | 2021-06-01 | 2021-08-24 | 佳木斯大学 | Medical image observation lamp box for image department |
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2014
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159992A (en) * | 2015-04-28 | 2016-11-23 | 台达电子企业管理（上海）有限公司 | Electric power supply system and power-converting device |
| 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 |
| CN113296275A (en) * | 2021-06-01 | 2021-08-24 | 佳木斯大学 | Medical image observation lamp box for image department |
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| Publication number | Publication date |
|---|---|
| CN103825455B (en) | 2017-01-04 |
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Granted publication date: 20170104 Termination date: 20200211 |