CN1967999A - Double step-down inverter - Google Patents
Double step-down inverter Download PDFInfo
- Publication number
- CN1967999A CN1967999A CN 200610096869 CN200610096869A CN1967999A CN 1967999 A CN1967999 A CN 1967999A CN 200610096869 CN200610096869 CN 200610096869 CN 200610096869 A CN200610096869 A CN 200610096869A CN 1967999 A CN1967999 A CN 1967999A
- Authority
- CN
- China
- Prior art keywords
- power switch
- switch pipe
- inductance
- anode
- negative electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract description 10
- 230000009467 reduction Effects 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The invention relates to a dual-reduction inverter, which comprises capacitor divide circuit, the first reduction circuit and the second reduction circuit, wherein the divide circuit is formed by two serially connected first and second capacitors; the first reduction circuit has the first power switch tube, the third power switch tube and the first inductance; the second reduction circuit has the second power switch tube, the fourth power switch tube and the second inductance; the load is connected between the anode of first power diode and the cathode of second power diode. The invention has the advantages that: when the input bus voltage is lower than output voltage, the inverter also can operate invert operation, with simple structure and simple control.
Description
One, technical field
The present invention relates to the inverter in a kind of transformation of electrical energy device, relate in particular to a kind of not only can the step-down inversion but also the inverter of the inversion of can boosting.
Two, background technology
The conventional inverter topology nearly all can be summed up as buck type decompression transducer structure, for guaranteeing the inverter operate as normal, requirement DC side busbar voltage must be greater than the output voltage peak value, with the mains system is example, be output as 220VAC, then the DC side busbar voltage will reach 315VDC at least, and this all can't satisfy in most of application scenarios, thereby must before inverter, increase one-level DC/DC straight convertor, input voltage is boosted to the DC side busbar voltage of requirement.Relative single step arrangement, the two-stage type structure of DC/DC straight convertor+DC/AC inverter has increased system complexity, has strengthened expense, has increased machine volume weight, has reduced whole power conversion efficiency.Thereby need obtain a kind of single-stage inverter of can realize boosting inversion and excellent performance.
Three, summary of the invention
1, goal of the invention: the purpose of this invention is to provide a kind of not only can the step-down inversion but also the single-stage inverter of the inversion of can boosting.
2, technical scheme: in order to reach above-mentioned goal of the invention, double step-down inverter of the present invention, comprise capacitance partial pressure circuit, first step-up/step-down circuit and second step-up/step-down circuit, wherein, the capacitance partial pressure circuit is made of two first electric capacity that are in series and second electric capacity, a ground connection that is connected in series of first electric capacity and second electric capacity, the positive pole of another termination external power supply of first electric capacity, the negative pole of another termination external power supply of second electric capacity; In first step-up/step-down circuit, the anode of first power switch pipe connects the positive pole of external power supply, the negative electrode of first power switch pipe is connected with the negative electrode of the 3rd power switch pipe, the anode of the 3rd power switch pipe is connected with the negative electrode of first power diode, one of first inductance is terminated between the negative electrode of the negative electrode of first power switch pipe and the 3rd power switch pipe, other end ground connection; In second step-up/step-down circuit, the negative electrode of second power switch pipe connects the negative pole of external power supply, the anode of second power switch pipe is connected with the anode of the 4th power switch pipe, the negative electrode of the 4th power switch pipe is connected with the anode of second power diode, one of second inductance is terminated between the anode of the anode of second power switch pipe and the 4th power switch pipe, other end ground connection; Load is connected between the negative electrode of the anode of first power diode and second power diode.
First inductance and second inductance coupling high are on same secondary magnetic core, and the end of the same name of first inductance and second inductance is connected.
The double step-down inverter that the present invention adopts comprises two step-down/up type bridge arm circuit unit, its input side joint dividing potential drop condenser network, its output side joint output filter capacitor and load circuit.Any two switching tubes are not directly to be connected to both ends of power behind the polyphone in this double step-down inverter circuit, do not have the danger of bridge circuit bridge arm direct pass; Freewheel current is passed through from power diode, and no switching device body diode reverse is recovered problem.This inverter has increased by two half periods and has often opened the switching tube (S of (closing)
3, S
4), be used for fly-wheel diode (D
1, D
2) electric current of branch road controls, possible the misleading of blocking-up fly-wheel diode, though increased device, but can select for use withstand voltage quota to be original half device, mean the reduction of break-over of device resistance and parasitic capacitance, whole on-state loss not necessarily increases, because the devices switch frequency can reduce, make the devices switch loss to reduce, add the reduction of filtering device loss, inverter efficiency can not reduce, and has realized reducing and more excellent output characteristic of machine volume weight, and the entire circuit structure is also uncomplicated.Controlling schemes is also simpler: adopt hysteresis current PWM control, guarantee that inverter circuit does not need any bias current when operate as normal, overcome the voltage distortion that inductive current intermittently causes simultaneously.Hysteresis current control scheme also has series of advantages such as inherent current limliting, dynamic property is fast, realization is simple.Because brachium pontis output becomes unipolarity by bipolarity, also make diode (D
1, D
2) the afterflow stage of working, the pressure drop size that is added on the inductance (L1, L2) reduces, and inductive current change rate diminishes, and the switching frequency that the ring modulation that stagnates obtains reduces, and keep the sense value that switching frequency can reduce filter inductance, and this also helps to reduce inductance.Two of this inverter inductance (L1, L2) can directly be integrated on the same secondary magnetic core in addition, further reduce the filter volume.
3, beneficial effect: the present invention is a kind of two step-down/up type one pole inverters of the inversion of promptly can the step-down inversion can boosting again, has following advantage:
(1) when the input side busbar voltage is lower than output voltage, two step-down/up type one pole inverters still can normally be finished invert function;
(2) entire circuit structure and controlling schemes are all comparatively simple, are easy to realize;
(3) entire circuit does not have the bridge arm direct pass problem, the reliability height;
(4) freewheel current makes power switch pipe and power diode can distinguish optimal design not by the body diode of switching tube.
Four, description of drawings
Fig. 1 is a double step-down inverter electrical block diagram of the present invention; Label title among Fig. 1: 1. capacitance partial pressure circuit; 2. step-up/step-down circuit 1; 3. output filter circuit and load; 4. step-up/step-down circuit 2.
Fig. 2 is each switch mode schematic diagram of double step-down inverter of the present invention;
Fig. 3 is the main waveform schematic diagram of double step-down inverter of the present invention;
Fig. 4 is the control block diagram that double step-down inverter of the present invention adopts.
Main designation in the above-mentioned accompanying drawing: C1～C2---the big electric capacity of input side dividing potential drop.Cf---output filter capacitor.D1～D2---power diode.Drv1～drv4---the drive waveforms of power switch tube S 1～S4.Ir---Voltage loop output is current reference.Il1---filter inductance L1 current waveform.Il2---filter inductance L2 current waveform.L1～L2---output inductor.R---load impedance.S1～S4---power switch pipe.2Ud---inverter input voltage is the DC side busbar voltage.Uo---inverter output voltage.
Five, embodiment
As shown in Figure 1, the double step-down inverter of the present embodiment, comprise capacitance partial pressure circuit 1, first step-up/step-down circuit 2 and second step-up/step-down circuit 4, wherein, capacitance partial pressure circuit 1 is made of two first capacitor C 1 that are in series and second capacitor C 2, a ground connection that is connected in series of first capacitor C 1 and second capacitor C 2, the positive pole of first capacitor C, 1 another termination external power supply, the negative pole of second capacitor C, 2 another termination external power supplys; In first step-up/step-down circuit 2, the anode of first power switch tube S 1 connects the positive pole of external power supply, the negative electrode of first power switch tube S 1 is connected with the negative electrode of the 3rd power switch tube S 3, the anode of the 3rd power switch tube S 3 is connected with the negative electrode of the first power diode D1, one of first inductance L 1 is terminated between the negative electrode of the negative electrode of first power switch tube S 1 and the 3rd power switch tube S 3, other end ground connection; In second step-up/step-down circuit 4, the negative electrode of second power switch tube S 2 connects the negative pole of external power supply, the anode of second power switch tube S 2 is connected with the anode of the 4th power switch tube S 4, the negative electrode of the 4th power switch tube S 4 is connected with the anode of the second power diode D2, one of second inductance L 2 is terminated between the anode of the anode of second power switch tube S 2 and the 4th power switch tube S 4, other end ground connection; Load circuit 3 is connected between the negative electrode of the anode of the first power diode D1 and the second power diode D2.
This double step-down inverter is at the minus negative half period of output current, and first buck circuit 2 is worked, and second buck circuit 4 is not worked, and power switch tube S 3 is often opened, and power switch tube S 4 is normally closed.This moment, circuit comprised two operation modes:
1. operation mode I
Shown in accompanying drawing 2 (a), power switch tube S 1 is open-minded, and the current i L1 of inductance L 1 is linear to rise, and the first afterflow branch road (S3 and D1) no current passes through, and sustained diode 1 is ended.
2. operation mode II
Shown in accompanying drawing 2 (b), power switch tube S 1 is turn-offed, and iL1 is from the first afterflow branch road (S3 and D1) afterflow, and linearity descends.
Greater than zero positive half cycle, second buck circuit 4 is worked at output current, and first buck circuit 2 is not worked, and power switch tube S 3 is normally closed, and power switch tube S 4 is often opened.This moment, circuit comprised two operation modes:
3. operation mode III
Shown in accompanying drawing 2 (c), power switch tube S 2 is open-minded, and the current i L2 of inductance L 2 is linear to rise, and the second afterflow branch road (S4 and D2) no current passes through, and sustained diode 2 is ended.
4. operation mode IV
Shown in accompanying drawing 2 (d), power switch tube S 2 is turn-offed, and iL2 is from the second afterflow branch road (S4 and D2) afterflow, and linearity descends.
More than four operation mode free lists 1 represent, the circuit key waveforms as shown in Figure 3, at output current zero passage place is the positions that 2,4 work of two step-up/step-down circuits are switched, and has a small amount of two reduction voltage circuits 2,4 and alternately nurses one's health the section of work, to keep output voltage waveforms.
The power tube switch combination state of table 1 double step-down inverter
| iL1 | iL2 | S1 | S2 | D1 | D2 | S3 | S4 | Respective figure 2 |
| ＞0 | ＝0 | 1 | 0 | 0 | 0 | 1 | 0 | (a) |
| ＞0 | ＝0 | 0 | 0 | 1 | 0 | 1 | 0 | (b) |
| ＝0 | ＞0 | 0 | 1 | 0 | 0 | 0 | 1 | (c) |
| ＝0 | ＞0 | 0 | 0 | 0 | 1 | 0 | 1 | (d) |
For realizing above operation principle, adopt controlling schemes as shown in Figure 4: output voltage and voltage reference obtain current reference ir through the Voltage loop computing.Inductance L 1 current i L1 and ir obtain the drive signal d1 of switching tube S1 through hysteresis comparator and drive circuit.D1 is a pwm signal in the positive half cycle modulation of current reference ir.Inductance L 2 current i L2 and ir obtain the drive signal d2 of switching tube S2 through hysteresis comparator and drive circuit.D2 is a pwm signal in the negative half period modulation of current reference ir.Current reference ir obtains drive signal d3 and the d4 of switching tube S3 and S4 through zero-crossing comparator and drive circuit.D3 and d4 are the square-wave signal of 180 ° of phase cross-overs substantially, only in the position that current reference ir zero passage is switched a small amount of saltus step are arranged.The level of d3 and d4 satisfies complementary relationship always, can only one be high another for low.The effect of control makes that at current reference greater than zero positive half cycle, switching tube S3 often opens, and switching tube S1 modulates work, and switching tube S2 and S34 do not work; At the minus negative half period of current reference, switching tube S4 often opens, and switching tube S2 modulates work, and switching tube S1 and S3 do not work.
Claims (2)
1, a kind of double step-down inverter, it is characterized in that, comprise capacitance partial pressure circuit (1), first step-up/step-down circuit (2) and second step-up/step-down circuit (4), wherein, capacitance partial pressure circuit (1) is made of two first electric capacity (C1) that are in series and second electric capacity (C2), a ground connection that is connected in series of first electric capacity (C1) and second electric capacity (C2), the positive pole of another termination external power supply of first electric capacity (C1), the negative pole of another termination external power supply of second electric capacity (C2); In first step-up/step-down circuit (2), the anode of first power switch pipe (S1) connects the positive pole of external power supply, the negative electrode of first power switch pipe (S1) is connected with the negative electrode of the 3rd power switch pipe (S3), the anode of the 3rd power switch pipe (S3) is connected with the negative electrode of first power diode (D1), one of first inductance (L1) is terminated between the negative electrode of the negative electrode of first power switch pipe (S1) and the 3rd power switch pipe (S3), other end ground connection; In second step-up/step-down circuit (4), the negative electrode of second power switch pipe (S2) connects the negative pole of external power supply, the anode of second power switch pipe (S2) is connected with the anode of the 4th power switch pipe (S4), the negative electrode of the 4th power switch pipe (S4) is connected with the anode of second power diode (D2), one of second inductance (L2) is terminated between the anode of the anode of second power switch pipe (S2) and the 4th power switch pipe (S4), other end ground connection; Load is connected between the negative electrode of the anode of first power diode (D1) and second power diode (D2).
2, double step-down inverter as claimed in claim 1 is characterized in that, first inductance (L1) and second inductance (L2) are coupling on the same secondary magnetic core, and the end of the same name of first inductance (L1) and second inductance (L2) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100968696A CN100433527C (en) | 2006-10-23 | 2006-10-23 | Double step-down inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100968696A CN100433527C (en) | 2006-10-23 | 2006-10-23 | Double step-down inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1967999A true CN1967999A (en) | 2007-05-23 |
| CN100433527C CN100433527C (en) | 2008-11-12 |
Family
ID=38076597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100968696A Expired - Fee Related CN100433527C (en) | 2006-10-23 | 2006-10-23 | Double step-down inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100433527C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958660A (en) * | 2010-10-04 | 2011-01-26 | 燕山大学 | Dual-Sepic buck-boost output parallel combined inverter |
| CN105048840A (en) * | 2015-08-27 | 2015-11-11 | 无锡伊佩克科技有限公司 | Optocoupler-isolation single-stage boost-buck vehicle power supply inverter |
| CN106452144A (en) * | 2016-11-03 | 2017-02-22 | 燕山大学 | Buck-boost tri-level inverter based on Zeta |
| CN106487267A (en) * | 2016-12-26 | 2017-03-08 | 三峡大学 | A kind of single-phase grid-connected inverter topological structure and its control method |
| CN106849731A (en) * | 2017-04-13 | 2017-06-13 | 盐城工学院 | A kind of control method of buck-boost grid-connected inverter |
| CN106877722A (en) * | 2017-04-13 | 2017-06-20 | 盐城工学院 | A kind of highly reliable buck-boost grid-connected inverter |
| CN110399031A (en) * | 2019-06-28 | 2019-11-01 | 武汉高德红外股份有限公司 | The method and board of power consumption are reduced based on integrated form boost-buck power chip |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0937565A (en) * | 1995-07-24 | 1997-02-07 | Fuji Electric Co Ltd | Single-phase double-voltage inverter |
| CN100431255C (en) * | 2003-05-12 | 2008-11-05 | 南京航空航天大学 | Main circuit topology of tri-electrical-level double-dropping type semi-bridge inverter and control method thereof |
| CN100384072C (en) * | 2004-07-01 | 2008-04-23 | 南京航空航天大学 | Double output double step-down type half bridge inverter, and control and modulation method |
| CN100488019C (en) * | 2005-06-30 | 2009-05-13 | 南京航空航天大学 | Double smoothing inductance full-bridge inverter main circuit |
-
2006
- 2006-10-23 CN CNB2006100968696A patent/CN100433527C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958660A (en) * | 2010-10-04 | 2011-01-26 | 燕山大学 | Dual-Sepic buck-boost output parallel combined inverter |
| CN101958660B (en) * | 2010-10-04 | 2013-01-09 | 燕山大学 | Dual-Sepic buck-boost output parallel combined inverter |
| CN105048840A (en) * | 2015-08-27 | 2015-11-11 | 无锡伊佩克科技有限公司 | Optocoupler-isolation single-stage boost-buck vehicle power supply inverter |
| CN106452144A (en) * | 2016-11-03 | 2017-02-22 | 燕山大学 | Buck-boost tri-level inverter based on Zeta |
| CN106452144B (en) * | 2016-11-03 | 2019-02-01 | 燕山大学 | A kind of buck-boost type three-level inverter based on Zeta |
| CN106487267A (en) * | 2016-12-26 | 2017-03-08 | 三峡大学 | A kind of single-phase grid-connected inverter topological structure and its control method |
| CN106849731A (en) * | 2017-04-13 | 2017-06-13 | 盐城工学院 | A kind of control method of buck-boost grid-connected inverter |
| CN106877722A (en) * | 2017-04-13 | 2017-06-20 | 盐城工学院 | A kind of highly reliable buck-boost grid-connected inverter |
| CN110399031A (en) * | 2019-06-28 | 2019-11-01 | 武汉高德红外股份有限公司 | The method and board of power consumption are reduced based on integrated form boost-buck power chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100433527C (en) | 2008-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101860192B (en) | Three-state three-level PFC circuit and multi-state three-level PFC circuit | |
| CN100438303C (en) | Five-level double step-down full bridge inverter | |
| CN100433526C (en) | Three-level double step-down full bridge inverter | |
| CN100459402C (en) | Three level double voltage reducing type semi-bridge converter | |
| CN101895223B (en) | Double-Cuk buck-boost output parallel-type converter | |
| CN1588773A (en) | Boost type active interlaced parallel soft switch circuit | |
| CN100433527C (en) | Double step-down inverter | |
| CN108599564A (en) | A kind of capacitance voltage discontinuous mode capacitance series formula crisscross parallel Bcuk pfc converters | |
| CN1731661A (en) | Two stage boost converter topology | |
| CN1967994A (en) | Two-way AC chopper | |
| CN103001484B (en) | The modulator approach of low auxiliary voltage zero voltage switch Bridgeless Power Factor Corrector | |
| CN109067219A (en) | A kind of three-phase AC/DC conversion device and its control method | |
| CN1270438A (en) | Two stage three-phase separating voltage converter | |
| CN105281361B (en) | A kind of five-level double step-down combining inverter | |
| CN103391001A (en) | High-gain DCDC converter for MPPT link of photovoltaic inverter | |
| CN209134309U (en) | A kind of three-phase alternating current-direct current buck translation circuit | |
| CN1929278B (en) | Cascading multiple electrical level double decompression semi-bridge converter | |
| CN100488019C (en) | Double smoothing inductance full-bridge inverter main circuit | |
| CN113507226A (en) | Three-phase rectifier converter and control method thereof | |
| CN115833613A (en) | Alternating current converter for improving output gain and design method thereof | |
| CN102969885A (en) | Additional-voltage-free zero voltage switch bridge-free power factor corrector and modulation method | |
| CN100459400C (en) | Semiperiod control single polar double voltage reducing convertor | |
| CN209105056U (en) | A kind of three-phase AC/DC conversion device | |
| CN109687743A (en) | A kind of power converting circuit | |
| CN109412451A (en) | A kind of electric power conversion apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20091123 |