CN100596011C - Coupling inductance dual-buck full bridge inverter - Google Patents
Coupling inductance dual-buck full bridge inverter Download PDFInfo
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- CN100596011C CN100596011C CN200710134541A CN200710134541A CN100596011C CN 100596011 C CN100596011 C CN 100596011C CN 200710134541 A CN200710134541 A CN 200710134541A CN 200710134541 A CN200710134541 A CN 200710134541A CN 100596011 C CN100596011 C CN 100596011C
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- coupling inductance
- power switch
- switch pipe
- winding
- fly
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Abstract
The invention relates to a coupling inductor dual buck full-bridge inverter, belonging to an electronic inverter. The inverter is composed of two buck circuits. One buck circuit comprises a first power switching tube (S1), a second power switching tube (S2), a first flywheel diode (D1), a second flywheel diode (D2), a first coupling inductor primary winding (L1A), a first coupling inductor secondary winding (L2A), a filtering capacitor (Cf) and a load (RL); and the other buck circuit comprises a third power switching tube (S3), a fourth power switching tube (S4), a third flywheel diode (D3), afourth flywheel diode (D4), a second coupling inductor primary winding (L1B), a second coupling inductor secondary winding (L2B), a filtering capacitor (Cf) and a load (RL). The inverter circuit adopts the coupling inductor to effectively reduce volume and loss of magnetic elements and improve inversion efficiency; and solves the direct connection of the power tube of the bridge arm of the bridgeinverter, so as to improve the reliability.
Description
Technical field
Coupling inductance dual-buck full bridge inverter of the present invention belongs to the Technics of Power Electronic Conversion topology.
Background technology
Along with to the improving constantly of inverter performance requirement, how to improve the reliability of converter, how to improve power density of transform and efficient, become the key issue of current research.Dual buck half bridge inverter owing to there is not the straight-through problem of the brachium pontis power tube of conventional bridge inverter, has improved the reliability of system, is particularly useful for the occasions high to reliability requirement such as Aero-Space, UPS.But there is the low shortcoming of input direct voltage utilance in it, i.e. brachium pontis output ceiling voltage has only half of input direct voltage.For the occasion of high pressure output, then require higher input direct voltage, increased the voltage stress of switching tube.For example: when output voltage was 220VAC, input direct voltage was wanted about 700V, and the voltage of the switching tube of then choosing quota will be greater than 700V, therefore for the very difficulty of choosing of switching tube.And for full-bridge inverter, its input direct voltage utilance height, when output voltage was 220VAC, as long as input direct voltage was about 350V, and switching tube is chosen easily.But full-bridge exists the brachium pontis switching tube to lead directly to problem, has reduced the reliability of system.
Summary of the invention
The objective of the invention is to defective at dual buck half bridge inverter and full-bridge inverter, from the reliability of raising system and the angle of efficient, develop a kind of no bias current, input DC bus-bar voltage utilance height, the straight-through problem that does not have conventional bridge inverter brachium pontis power tube, the coupling inductance double-step-down type full-bridge inverter of high efficiency and highly reliable operation (Coupled Inductor Dual-Buck Full Bridge Inverter).A kind of coupling inductance dual-buck full bridge inverter, it is characterized in that, comprise two buck circuits, the composition of first buck circuit is, be connected in the drain electrode of first power switch pipe by positive source, the first power switch pipe source electrode is connected in the former limit of first coupling inductance winding end of the same name, the former limit of first coupling inductance winding different name end is connected in the filter capacitor positive pole, the filter capacitor negative pole is connected in first coupling inductance secondary winding end of the same name, the first coupling inductance secondary winding different name end is connected in the drain electrode of second power switch pipe, the second power switch pipe source electrode is connected in power cathode and forms one tunnel series loop, and first the fly-wheel diode negative electrode be connected in the first power switch pipe source electrode, anode is connected in power cathode, the second fly-wheel diode negative electrode is connected in positive source, and anode is connected in the drain electrode of second power switch pipe; The composition of second buck circuit is, be connected in the drain electrode of the 3rd power switch pipe by positive source, the 3rd power switch pipe source electrode is connected in the former limit of second coupling inductance winding end of the same name, the former limit of second coupling inductance winding different name end is connected in the filter capacitor negative pole, the filter capacitor positive pole is connected in second coupling inductance secondary winding end of the same name, the second coupling inductance secondary winding different name end is connected in the drain electrode of the 4th power switch pipe, the 4th power switch pipe source electrode is connected in that power cathode is formed another road series loop and the 3rd fly-wheel diode negative electrode is connected in the 3rd power switch pipe source electrode, anode is connected in power cathode, the 4th fly-wheel diode negative electrode is connected in positive source, anode is connected in the 4th power switch pipe drain electrode, described filter capacitor shunt load two ends and connect " ".
Compared with prior art, major technique characteristics of the present invention are: do not have the straight-through problem of power tube of conventional inverter brachium pontis, improved the reliability of system greatly, and the diode design that can be optimized, each switching tube does not need to establish Dead Time; Improved the utilance of input DC bus-bar voltage; The former limit winding and the secondary winding of coupling inductance forward connected on an iron core, adopts unity couping, reduced the volume and the loss of magnetic spare, improved conversion efficiency.
Coupling inductance dual-buck full bridge inverter of the present invention can adopt the control of SPWM sinusoidal pulse width modulation, and the ring control that stagnates waits control strategy.
Description of drawings
Fig. 1 is the main circuit schematic diagram of coupling inductance dual-buck full bridge inverter.
Designation among the figure: V
In---supply voltage, S
1～S
4---power switch pipe, D
1～D
4---fly-wheel diode, L
1A, L
2A---former limit of first coupling inductance and secondary winding, L
1B, L
2B---former limit of second coupling inductance and secondary winding, C
f---filter capacitor, R
L---load.v
o---output voltage.
Fig. 2 is the main waveform schematic diagram of coupling inductance dual-buck full bridge inverter.
Designation among the figure: S
1～S
4---power switch pipe drive signal separately, i
L1A, i
L2A---flow through the former limit of first coupling inductance winding L
1AWith the secondary winding L
2AElectric current, i
L1B, i
L2B---flow through the former limit of second coupling inductance winding L
1BWith the secondary winding L
2BElectric current, i
L---filter capacitor electric current and load current sum, v
o---output voltage.
Fig. 3～6th, the equivalent circuit structure schematic diagram of each switch mode.
Embodiment
Narrate the specific embodiment of the present invention with reference to the accompanying drawings.As shown in Figure 1, coupling inductance dual-buck full bridge inverter of the present invention is made up of two buck circuits.When filter capacitor electric current and load current sum are timing (reference direction as shown in Figure 1), by power supply V
In, power switch tube S
1And S
2, coupling inductance A, filter capacitor C
fWith load R
L, and sustained diode
1And D
2Form a buck circuit; When filter capacitor electric current and load current sum when negative, by power supply V
In, power switch tube S
3And S
4, coupling inductance B, filter capacitor C
fWith load R
L, and sustained diode
3And D
4Form another buck circuit.
Control method is as follows: definition output filter capacitor electric current and load current sum are i
L, the electric current and voltage reference direction as shown in Figure 1.Work as i
L＞0 o'clock, power switch tube S
3And S
4Turn-off power switch tube S
1And S
2Switch is copped wave pipe (corresponding to Fig. 3 and Fig. 4) simultaneously; Work as i
L＜0, power switch tube S
1And S
2Turn-off power switch tube S
3And S
4Switch is copped wave pipe (corresponding to Fig. 5 and Fig. 6) simultaneously.
In conjunction with Fig. 3～6 narrations concrete operation principle of the present invention, below the working condition of each switch mode is made a concrete analysis of.
Before analyzing, make the following assumptions: 1. all power switch pipes and diode are desirable device, do not consider switching time, conduction voltage drop; 2. all inductance, electric capacity are ideal element.
1. switch mode 1[is corresponding to Fig. 3]
Power switch tube S
1, S
2Conducting is by supply voltage V
InPositive pole passes through power switch tube S
1, the former limit of first coupling inductance winding L
1A, load R
LWith filter capacitor C
f, the first coupling inductance secondary winding L
2A, power switch tube S
2Get back to the supply voltage negative pole, the first coupling inductance current i
L1AAnd i
L2ARise.
2. switch mode 2[is corresponding to Fig. 4]
Power switch tube S
1, S
2Turn-off sustained diode
1, D
2Conducting is by supply voltage V
InNegative pole passes through sustained diode
1, the former limit of first coupling inductance winding L
1A, load R
LWith filter capacitor C
f, the first coupling inductance secondary winding L
2A, sustained diode
2Get back to the supply voltage positive pole, the first coupling inductance current i
L1AAnd i
L2ADescend.
3. switch mode 3[is corresponding to Fig. 5]
Power switch tube S
3, S
4Conducting is by supply voltage V
InPositive pole passes through power switch tube S
3, the former limit of second coupling inductance winding L
1B, load R
LWith filter capacitor C
f, the second coupling inductance secondary winding L
2B, power switch tube S
4Get back to the supply voltage negative pole, the second coupling inductance current i
L1BAnd i
L2BRise.
4. switch mode 4[is corresponding to Fig. 6]
Power switch tube S
3, S
4Turn-off sustained diode
3, D
4Conducting is by supply voltage V
InNegative pole passes through sustained diode
3, the former limit of second coupling inductance winding L
1B, load R
LWith filter capacitor C
f, the second coupling inductance secondary winding L
2B, sustained diode
4Get back to the supply voltage positive pole, the second coupling inductance current i
L1BAnd i
L2BDescend.
As seen from the above description, the coupling inductance dual-buck full bridge inverter of the present invention's proposition has following advantage:
1. do not have the straight-through problem of bridge-type inverter brachium pontis power tube, switching tube does not need to establish Dead Time, The system reliability height has been eliminated the non-linear and wave distortion problem that the dead band causes;
2. input direct-current busbar voltage utilization rate height;
3. power switch pipe and fly-wheel diode can obtain respectively optimal design, and switching loss is low, can be real Existing higher switching frequency;
4. adopt coupling inductance, reduced magnetic spare volume and loss, improved conversion efficiency.
Claims (1)
1, a kind of coupling inductance dual-buck full bridge inverter is characterized in that, comprises two buck circuits, and first buck circuit comprises power supply (V
In), the first power switch pipe (S
1), the second power switch pipe (S
2), the former limit of first coupling inductance winding (L
1A), the first coupling inductance secondary winding (L
2A), filter capacitor (C
f), the first fly-wheel diode (D
1), the second fly-wheel diode (D
2), described first coupling inductance former limit winding (L
1A) comprise first end and second end, the described first coupling inductance secondary winding (L
2A) comprise first end and second end, the wherein former limit of first coupling inductance winding (L
1A) first end and the first coupling inductance secondary winding (L
2A) first end is end of the same name, power supply (V
In) positive pole is connected in the first power switch pipe (S
1) drain electrode, the first power switch pipe (S
1) source electrode is connected in the former limit of first coupling inductance winding (L
1A) first end, the former limit of first coupling inductance winding (L
1A) second end is connected in filter capacitor (C
f) positive pole, filter capacitor (C
f) negative pole is connected in the first coupling inductance secondary winding (L
2A) first end, the first coupling inductance secondary winding (L
2A) second end is connected in the second power switch pipe (S
2) drain electrode, the second power switch pipe (S
2) source electrode is connected in power supply (V
In) negative pole forms one tunnel series loop, the first fly-wheel diode (D
1) negative electrode is connected in the first power switch pipe (S
1) source electrode, the first fly-wheel diode (D
1) anode is connected in power supply (V
In) negative pole, the second fly-wheel diode (D
2) negative electrode is connected in power supply (V
In) anodal, the second fly-wheel diode (D
2) anode is connected in the second power switch pipe (S
2) drain electrode; Second buck circuit comprises power supply (V
In), the 3rd power switch pipe (S
3), the 4th power switch pipe (S
4), the former limit of second coupling inductance winding (L
1B), the second coupling inductance secondary winding (L
2B), filter capacitor (C
f), the 3rd fly-wheel diode (D
3), the 4th fly-wheel diode (D
4), described second coupling inductance former limit winding (L
1B) comprise first end and second end, the described second coupling inductance secondary winding (L
2B) comprise first end and second end, the wherein former limit of second coupling inductance winding (L
1B) first end and the second coupling inductance secondary winding (L
2B) first end is end of the same name, power supply (V
In) positive pole is connected in the 3rd power switch pipe (S
3) drain electrode, the 3rd power switch pipe (S
3) source electrode is connected in the former limit of second coupling inductance winding (L
1B) first end, the former limit of second coupling inductance winding (L
1B) second end is connected in filter capacitor (C
f) negative pole, filter capacitor (C
f) positive pole is connected in the second coupling inductance secondary winding (L
2B) first end, the second coupling inductance secondary winding (L
2B) second end is connected in the 4th power switch pipe (S
4) drain electrode, the 4th power switch pipe (S
4) source electrode is connected in power supply (V
In) negative pole forms another road series loop, the 3rd fly-wheel diode (D
3) negative electrode is connected in the 3rd power switch pipe (S
3) source electrode, the 3rd fly-wheel diode (D
3) anode is connected in power supply (V
In) negative pole, the 4th fly-wheel diode (D
4) negative electrode is connected in power supply (V
In) anodal, the 4th fly-wheel diode (D
4) anode is connected in the 4th power switch pipe (S
4) drain electrode, described filter capacitor (C
f) be connected in parallel on load (R
L) two ends, wherein negativing ending grounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710134541A CN100596011C (en) | 2007-10-29 | 2007-10-29 | Coupling inductance dual-buck full bridge inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710134541A CN100596011C (en) | 2007-10-29 | 2007-10-29 | Coupling inductance dual-buck full bridge inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101145740A CN101145740A (en) | 2008-03-19 |
| CN100596011C true CN100596011C (en) | 2010-03-24 |
Family
ID=39208080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710134541A Expired - Fee Related CN100596011C (en) | 2007-10-29 | 2007-10-29 | Coupling inductance dual-buck full bridge inverter |
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| Country | Link |
|---|---|
| CN (1) | CN100596011C (en) |
Cited By (1)
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|---|---|---|---|---|
| TWI508424B (en) * | 2013-10-11 | 2015-11-11 | Delta Electronics Inc | Solar photovoltaic power conversion system and method of operating the same |
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-
2007
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|---|---|---|---|---|
| CN1411132A (en) * | 2002-10-21 | 2003-04-16 | 南京航空航天大学 | Lay loop current control type double dropping half bridge convertor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI508424B (en) * | 2013-10-11 | 2015-11-11 | Delta Electronics Inc | Solar photovoltaic power conversion system and method of operating the same |
| US9300225B2 (en) | 2013-10-11 | 2016-03-29 | Delta Electronics, Inc. | Solar photovoltaic power conversion system and method of operating the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101145740A (en) | 2008-03-19 |
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Application publication date: 20080319 Assignee: Yangzhou Shuanghong Electronics Co., Ltd. Assignor: Nanjing University of Aeronautics and Astronautics Contract record no.: 2013320000082 Denomination of invention: Coupling inductance dual-buck full bridge inverter Granted publication date: 20100324 License type: Exclusive License Record date: 20130314 |
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